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Diffstat (limited to 'rcynic/rcynic.c')
| -rw-r--r-- | rcynic/rcynic.c | 6070 |
1 files changed, 0 insertions, 6070 deletions
diff --git a/rcynic/rcynic.c b/rcynic/rcynic.c deleted file mode 100644 index dea9c48f..00000000 --- a/rcynic/rcynic.c +++ /dev/null @@ -1,6070 +0,0 @@ -/* - * Copyright (C) 2013--2014 Dragon Research Labs ("DRL") - * Portions copyright (C) 2009--2012 Internet Systems Consortium ("ISC") - * Portions copyright (C) 2006--2008 American Registry for Internet Numbers ("ARIN") - * - * Permission to use, copy, modify, and distribute this software for any - * purpose with or without fee is hereby granted, provided that the above - * copyright notices and this permission notice appear in all copies. - * - * THE SOFTWARE IS PROVIDED "AS IS" AND DRL, ISC, AND ARIN DISCLAIM ALL - * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED - * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DRL, - * ISC, OR ARIN BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR - * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS - * OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, - * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION - * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. - */ - -/* $Id$ */ - -/** - * @mainpage - * - * "Cynical rsync": Recursively walk RPKI tree using rsync to pull - * data from remote sites, validating certificates and CRLs as we go. - * - * Doxygen doesn't quite know what to make of a one-file C program, - * and ends up putting most of the interesting data @link rcynic.c - * here. @endlink - */ - -#include <assert.h> -#include <stdio.h> -#include <stdlib.h> -#include <stdarg.h> -#include <unistd.h> -#include <sys/types.h> -#include <sys/time.h> -#include <sys/file.h> -#include <errno.h> -#include <sys/signal.h> -#include <sys/wait.h> -#include <time.h> -#include <string.h> -#include <sys/stat.h> -#include <dirent.h> -#include <limits.h> -#include <fcntl.h> -#include <signal.h> -#include <utime.h> -#include <glob.h> -#include <sys/param.h> -#include <getopt.h> - -#define SYSLOG_NAMES /* defines CODE prioritynames[], facilitynames[] */ -#include <syslog.h> - -#include <openssl/bio.h> -#include <openssl/pem.h> -#include <openssl/err.h> -#include <openssl/x509.h> -#include <openssl/x509v3.h> -#include <openssl/safestack.h> -#include <openssl/conf.h> -#include <openssl/rand.h> -#include <openssl/asn1t.h> -#include <openssl/cms.h> - -#include <rpki/roa.h> -#include <rpki/manifest.h> - -#include "bio_f_linebreak.h" - -#include "defstack.h" - -#if !defined(FILENAME_MAX) && defined(PATH_MAX) && PATH_MAX > 1024 -#define FILENAME_MAX PATH_MAX -#elif !defined(FILENAME_MAX) -#define FILENAME_MAX 1024 -#endif - -#define SCHEME_RSYNC ("rsync://") -#define SIZEOF_RSYNC (sizeof(SCHEME_RSYNC) - 1) - -/** - * Maximum length of a hostname. - */ -#ifndef HOSTNAME_MAX -#define HOSTNAME_MAX 256 -#endif - -/** - * Maximum length of an URI. - */ -#define URI_MAX (SIZEOF_RSYNC + HOSTNAME_MAX + 1 + FILENAME_MAX) - -/** - * Maximum number of times we try to kill an inferior process before - * giving up. - */ -#define KILL_MAX 10 - -/** - * Version number of XML summary output. - */ -#define XML_SUMMARY_VERSION 1 - -/** - * How much buffer space do we need for a raw address? - */ -#define ADDR_RAW_BUF_LEN 16 - -/** - * How many bytes is a SHA256 digest? - */ -#define HASH_SHA256_LEN 32 - -/** - * Logging levels. Same general idea as syslog(), but our own - * catagories based on what makes sense for this program. Default - * mappings to syslog() priorities are here because it's the easiest - * way to make sure that we assign a syslog level to each of ours. - */ - -#define LOG_LEVELS \ - QQ(log_sys_err, LOG_ERR) /* Error from OS or library */ \ - QQ(log_usage_err, LOG_ERR) /* Bad usage (local error) */ \ - QQ(log_data_err, LOG_NOTICE) /* Bad data, no biscuit */ \ - QQ(log_telemetry, LOG_INFO) /* Normal progress chatter */ \ - QQ(log_verbose, LOG_INFO) /* Extra chatter */ \ - QQ(log_debug, LOG_DEBUG) /* Only useful when debugging */ - -#define QQ(x,y) x , -typedef enum log_level { LOG_LEVELS LOG_LEVEL_T_MAX } log_level_t; -#undef QQ - -#define QQ(x,y) { #x , x }, -static const struct { - const char *name; - log_level_t value; -} log_levels[] = { - LOG_LEVELS -}; -#undef QQ - -/** - * MIB counters derived from OpenSSL. Long list of validation failure - * codes from OpenSSL (crypto/x509/x509_vfy.h). - */ - -#define MIB_COUNTERS_FROM_OPENSSL \ - QV(X509_V_ERR_UNABLE_TO_GET_CRL) \ - QV(X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE) \ - QV(X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE) \ - QV(X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY) \ - QV(X509_V_ERR_CERT_SIGNATURE_FAILURE) \ - QV(X509_V_ERR_CRL_SIGNATURE_FAILURE) \ - QV(X509_V_ERR_CERT_NOT_YET_VALID) \ - QV(X509_V_ERR_CERT_HAS_EXPIRED) \ - QV(X509_V_ERR_CRL_NOT_YET_VALID) \ - QV(X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD) \ - QV(X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD) \ - QV(X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD) \ - QV(X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD) \ - QV(X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT) \ - QV(X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN) \ - QV(X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY) \ - QV(X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE) \ - QV(X509_V_ERR_CERT_CHAIN_TOO_LONG) \ - QV(X509_V_ERR_CERT_REVOKED) \ - QV(X509_V_ERR_INVALID_CA) \ - QV(X509_V_ERR_PATH_LENGTH_EXCEEDED) \ - QV(X509_V_ERR_INVALID_PURPOSE) \ - QV(X509_V_ERR_CERT_UNTRUSTED) \ - QV(X509_V_ERR_CERT_REJECTED) \ - QV(X509_V_ERR_AKID_SKID_MISMATCH) \ - QV(X509_V_ERR_AKID_ISSUER_SERIAL_MISMATCH) \ - QV(X509_V_ERR_KEYUSAGE_NO_CERTSIGN) \ - QV(X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER) \ - QV(X509_V_ERR_UNHANDLED_CRITICAL_EXTENSION) \ - QV(X509_V_ERR_KEYUSAGE_NO_CRL_SIGN) \ - QV(X509_V_ERR_UNHANDLED_CRITICAL_CRL_EXTENSION) \ - QV(X509_V_ERR_INVALID_NON_CA) \ - QV(X509_V_ERR_PROXY_PATH_LENGTH_EXCEEDED) \ - QV(X509_V_ERR_KEYUSAGE_NO_DIGITAL_SIGNATURE) \ - QV(X509_V_ERR_PROXY_CERTIFICATES_NOT_ALLOWED) \ - QV(X509_V_ERR_INVALID_EXTENSION) \ - QV(X509_V_ERR_INVALID_POLICY_EXTENSION) \ - QV(X509_V_ERR_NO_EXPLICIT_POLICY) \ - QV(X509_V_ERR_UNNESTED_RESOURCE) - -/** - * MIB counters specific to rcynic. - */ - -#define MIB_COUNTERS \ - MIB_COUNTERS_FROM_OPENSSL \ - QB(aia_extension_missing, "AIA extension missing") \ - QB(aia_extension_forbidden, "AIA extension forbidden") \ - QB(aia_uri_missing, "AIA URI missing") \ - QB(aki_extension_issuer_mismatch, "AKI extension issuer mismatch") \ - QB(aki_extension_missing, "AKI extension missing") \ - QB(aki_extension_wrong_format, "AKI extension is wrong format") \ - QB(bad_asidentifiers, "Bad ASIdentifiers extension") \ - QB(bad_certificate_policy, "Bad certificate policy") \ - QB(bad_cms_econtenttype, "Bad CMS eContentType") \ - QB(bad_cms_si_contenttype, "Bad CMS SI ContentType") \ - QB(bad_cms_signer, "Bad CMS signer") \ - QB(bad_cms_signer_infos, "Bad CMS signerInfos") \ - QB(bad_crl, "Bad CRL") \ - QB(bad_ipaddrblocks, "Bad IPAddrBlocks extension") \ - QB(bad_key_usage, "Bad keyUsage") \ - QB(bad_manifest_digest_length, "Bad manifest digest length") \ - QB(bad_public_key, "Bad public key") \ - QB(bad_roa_asID, "Bad ROA asID") \ - QB(bad_certificate_serial_number, "Bad certificate serialNumber") \ - QB(bad_manifest_number, "Bad manifestNumber") \ - QB(certificate_bad_signature, "Bad certificate signature") \ - QB(certificate_failed_validation, "Certificate failed validation") \ - QB(cms_econtent_decode_error, "CMS eContent decode error") \ - QB(cms_includes_crls, "CMS includes CRLs") \ - QB(cms_signer_missing, "CMS signer missing") \ - QB(cms_ski_mismatch, "CMS SKI mismatch") \ - QB(cms_validation_failure, "CMS validation failure") \ - QB(crl_issuer_name_mismatch, "CRL issuer name mismatch") \ - QB(crl_not_in_manifest, "CRL not listed in manifest") \ - QB(crl_not_yet_valid, "CRL not yet valid") \ - QB(crl_number_extension_missing, "CRL number extension missing") \ - QB(crl_number_is_negative, "CRL number is negative") \ - QB(crl_number_out_of_range, "CRL number out of range") \ - QB(crldp_doesnt_match_issuer_sia, "CRLDP doesn't match issuer's SIA") \ - QB(crldp_uri_missing, "CRLDP URI missing") \ - QB(disallowed_x509v3_extension, "Disallowed X.509v3 extension") \ - QB(duplicate_name_in_manifest, "Duplicate name in manifest") \ - QB(inappropriate_eku_extension, "Inappropriate EKU extension") \ - QB(malformed_aia_extension, "Malformed AIA extension") \ - QB(malformed_sia_extension, "Malformed SIA extension") \ - QB(malformed_basic_constraints, "Malformed basicConstraints") \ - QB(malformed_trust_anchor, "Malformed trust anchor") \ - QB(malformed_cadirectory_uri, "Malformed caDirectory URI") \ - QB(malformed_crldp_extension, "Malformed CRDLP extension") \ - QB(malformed_crldp_uri, "Malformed CRDLP URI") \ - QB(malformed_roa_addressfamily, "Malformed ROA addressFamily") \ - QB(malformed_tal_uri, "Malformed TAL URI") \ - QB(manifest_carepository_mismatch, "Manifest caRepository mismatch") \ - QB(manifest_interval_overruns_cert, "Manifest interval overruns certificate") \ - QB(manifest_lists_missing_object, "Manifest lists missing object") \ - QB(manifest_not_yet_valid, "Manifest not yet valid") \ - QB(missing_resources, "Missing resources") \ - QB(nonconformant_asn1_time_value, "Nonconformant ASN.1 time value") \ - QB(nonconformant_public_key_algorithm,"Nonconformant public key algorithm")\ - QB(nonconformant_signature_algorithm, "Nonconformant signature algorithm")\ - QB(nonconformant_digest_algorithm, "Nonconformant digest algorithm") \ - QB(nonconformant_certificate_uid, "Nonconformant certificate UID") \ - QB(object_rejected, "Object rejected") \ - QB(rfc3779_inheritance_required, "RFC 3779 inheritance required") \ - QB(roa_contains_bad_afi_value, "ROA contains bad AFI value") \ - QB(roa_max_prefixlen_too_short, "ROA maxPrefixlen too short") \ - QB(roa_resource_not_in_ee, "ROA resource not in EE") \ - QB(roa_resources_malformed, "ROA resources malformed") \ - QB(rsync_transfer_failed, "rsync transfer failed") \ - QB(rsync_transfer_timed_out, "rsync transfer timed out") \ - QB(safi_not_allowed, "SAFI not allowed") \ - QB(sia_cadirectory_uri_missing, "SIA caDirectory URI missing") \ - QB(sia_extension_missing, "SIA extension missing") \ - QB(sia_manifest_uri_missing, "SIA manifest URI missing") \ - QB(ski_extension_missing, "SKI extension missing") \ - QB(ski_public_key_mismatch, "SKI public key mismatch") \ - QB(trust_anchor_key_mismatch, "Trust anchor key mismatch") \ - QB(trust_anchor_with_crldp, "Trust anchor can't have CRLDP") \ - QB(unknown_afi, "Unknown AFI") \ - QB(unknown_openssl_verify_error, "Unknown OpenSSL verify error") \ - QB(unreadable_trust_anchor, "Unreadable trust anchor") \ - QB(unreadable_trust_anchor_locator, "Unreadable trust anchor locator") \ - QB(wrong_object_version, "Wrong object version") \ - QW(aia_doesnt_match_issuer, "AIA doesn't match issuer") \ - QW(backup_thisupdate_newer_than_current, "Backup thisUpdate newer than current") \ - QW(backup_number_higher_than_current, "Backup number higher than current") \ - QW(bad_thisupdate, "Bad CRL thisUpdate") \ - QW(bad_cms_si_signed_attributes, "Bad CMS SI signed attributes") \ - QW(bad_signed_object_uri, "Bad signedObject URI") \ - QW(crldp_names_newer_crl, "CRLDP names newer CRL") \ - QW(digest_mismatch, "Digest mismatch") \ - QW(ee_certificate_with_1024_bit_key, "EE certificate with 1024 bit key") \ - QW(issuer_uses_multiple_crldp_values, "Issuer uses multiple CRLDP values")\ - QW(multiple_rsync_uris_in_extension, "Multiple rsync URIs in extension") \ - QW(nonconformant_issuer_name, "Nonconformant X.509 issuer name") \ - QW(nonconformant_subject_name, "Nonconformant X.509 subject name") \ - QW(policy_qualifier_cps, "Policy Qualifier CPS") \ - QW(rsync_partial_transfer, "rsync partial transfer") \ - QW(rsync_transfer_skipped, "rsync transfer skipped") \ - QW(sia_extension_missing_from_ee, "SIA extension missing from EE") \ - QW(skipped_because_not_in_manifest, "Skipped because not in manifest") \ - QW(stale_crl_or_manifest, "Stale CRL or manifest") \ - QW(tainted_by_stale_crl, "Tainted by stale CRL") \ - QW(tainted_by_stale_manifest, "Tainted by stale manifest") \ - QW(tainted_by_not_being_in_manifest, "Tainted by not being in manifest") \ - QW(trust_anchor_not_self_signed, "Trust anchor not self-signed") \ - QW(trust_anchor_skipped, "Trust anchor skipped") \ - QW(unknown_object_type_skipped, "Unknown object type skipped") \ - QW(uri_too_long, "URI too long") \ - QW(wrong_cms_si_signature_algorithm, "Wrong CMS SI signature algorithm") \ - QW(wrong_cms_si_digest_algorithm, "Wrong CMS SI digest algorithm") \ - QG(non_rsync_uri_in_extension, "Non-rsync URI in extension") \ - QG(object_accepted, "Object accepted") \ - QG(rechecking_object, "Rechecking object") \ - QG(rsync_transfer_succeeded, "rsync transfer succeeded") \ - QG(validation_ok, "OK") - -#define QV(x) QB(mib_openssl_##x, 0) - -static const char - mib_counter_kind_good[] = "good", - mib_counter_kind_warn[] = "warn", - mib_counter_kind_bad[] = "bad"; - -#define QG(x,y) mib_counter_kind_good , -#define QW(x,y) mib_counter_kind_warn , -#define QB(x,y) mib_counter_kind_bad , -static const char * const mib_counter_kind[] = { MIB_COUNTERS NULL }; -#undef QB -#undef QW -#undef QG - -#define QG(x,y) QQ(x,y) -#define QW(x,y) QQ(x,y) -#define QB(x,y) QQ(x,y) - -#define QQ(x,y) x , -typedef enum mib_counter { MIB_COUNTERS MIB_COUNTER_T_MAX } mib_counter_t; -#undef QQ - -#define QQ(x,y) y , -static const char * const mib_counter_desc[] = { MIB_COUNTERS NULL }; -#undef QQ - -#define QQ(x,y) #x , -static const char * const mib_counter_label[] = { MIB_COUNTERS NULL }; -#undef QQ - -#undef QV - -#define QQ(x,y) 0 , -#define QV(x) x , -static const long mib_counter_openssl[] = { MIB_COUNTERS 0 }; -#undef QV -#undef QQ - -/** - * Object sources. We always try to get fresh copies of objects using - * rsync, but if that fails we try using backup copies from what - * worked the last time we were run. This means that a URI - * potentially represents two different objects, so we need to - * distinguish them for tracking purposes in our validation log. - */ - -#define OBJECT_GENERATIONS \ - QQ(null) \ - QQ(current) \ - QQ(backup) - -#define QQ(x) object_generation_##x , -typedef enum object_generation { OBJECT_GENERATIONS OBJECT_GENERATION_MAX } object_generation_t; -#undef QQ - -#define QQ(x) #x , -static const char * const object_generation_label[] = { OBJECT_GENERATIONS NULL }; -#undef QQ - -/** - * Type-safe string wrapper for URIs. - */ -typedef struct { char s[URI_MAX]; } uri_t; - -/** - * Type-safe string wrapper for filename paths. - */ -typedef struct { char s[FILENAME_MAX]; } path_t; - -/** - * Type-safe wrapper for hash buffers. - */ -typedef struct { unsigned char h[EVP_MAX_MD_SIZE]; } hashbuf_t; - -/** - * Type-safe wrapper for timestamp strings. - */ -typedef struct { char s[sizeof("2001-01-01T00:00:00Z") + 1]; } timestamp_t; - -/** - * Per-URI validation status object. - * uri must be first element. - */ -typedef struct validation_status { - uri_t uri; - object_generation_t generation; - time_t timestamp; - unsigned char events[(MIB_COUNTER_T_MAX + 7) / 8]; - short balance; - struct validation_status *left_child; - struct validation_status *right_child; -} validation_status_t; - -DECLARE_STACK_OF(validation_status_t) - -/** - * Structure to hold data parsed out of a certificate. - */ -typedef struct certinfo { - int ca, ta; - object_generation_t generation; - uri_t uri, sia, aia, crldp, manifest, signedobject; -} certinfo_t; - -typedef struct rcynic_ctx rcynic_ctx_t; - -/** - * States that a walk_ctx_t can be in. - */ -typedef enum { - walk_state_initial, /**< Initial state */ - walk_state_rsync, /**< rsyncing certinfo.sia */ - walk_state_ready, /**< Ready to traverse outputs */ - walk_state_current, /**< prefix = rc->unauthenticated */ - walk_state_backup, /**< prefix = rc->old_authenticated */ - walk_state_done /**< Done walking this cert's outputs */ -} walk_state_t; - -/** - * Context for certificate tree walks. This includes all the stuff - * that we would keep as automatic variables on the call stack if we - * didn't have to use callbacks to support multiple rsync processes. - */ -typedef struct walk_ctx { - unsigned refcount; - certinfo_t certinfo; - X509 *cert; - Manifest *manifest; - object_generation_t manifest_generation; - STACK_OF(OPENSSL_STRING) *filenames; - int manifest_iteration, filename_iteration, stale_manifest; - walk_state_t state; - uri_t crldp; - STACK_OF(X509) *certs; - STACK_OF(X509_CRL) *crls; -} walk_ctx_t; - -DECLARE_STACK_OF(walk_ctx_t) - -/** - * Return codes from rsync functions. - */ -typedef enum { - rsync_status_done, /* Request completed */ - rsync_status_failed, /* Request failed */ - rsync_status_timed_out, /* Request timed out */ - rsync_status_pending, /* Request in progress */ - rsync_status_skipped /* Request not attempted */ -} rsync_status_t; - -/** - * States for asynchronous rsync. - * "initial" must be first. - */ - -#define RSYNC_STATES \ - QQ(initial) \ - QQ(running) \ - QQ(conflict_wait) \ - QQ(retry_wait) \ - QQ(closed) \ - QQ(terminating) - -#define QQ(x) rsync_state_##x, -typedef enum { RSYNC_STATES RSYNC_STATE_T_MAX } rsync_state_t; -#undef QQ - -#define QQ(x) #x , -static const char * const rsync_state_label[] = { RSYNC_STATES NULL }; -#undef QQ - -/** - * Context for asyncronous rsync. - */ -typedef struct rsync_ctx { - uri_t uri; - void (*handler)(rcynic_ctx_t *, const struct rsync_ctx *, const rsync_status_t, const uri_t *, void *); - void *cookie; - rsync_state_t state; - enum { - rsync_problem_none, /* Must be first */ - rsync_problem_timed_out, - rsync_problem_refused - } problem; - unsigned tries; - pid_t pid; - int fd; - time_t started, deadline; - char buffer[URI_MAX * 4]; - size_t buflen; -} rsync_ctx_t; - -DECLARE_STACK_OF(rsync_ctx_t) - -/** - * Record of rsync attempts. - */ -typedef struct rsync_history { - uri_t uri; - time_t started, finished; - rsync_status_t status; - int final_slash; -} rsync_history_t; - -DECLARE_STACK_OF(rsync_history_t) - -/** - * Deferred task. - */ -typedef struct task { - void (*handler)(rcynic_ctx_t *, void *); - void *cookie; -} task_t; - -DECLARE_STACK_OF(task_t) - -/** - * Trust anchor locator (TAL) fetch context. - */ -typedef struct tal_ctx { - uri_t uri; - path_t path; - EVP_PKEY *pkey; -} tal_ctx_t; - -/** - * Extended context for verify callbacks. This is a wrapper around - * OpenSSL's X509_STORE_CTX, and the embedded X509_STORE_CTX @em must be - * the first element of this structure in order for the evil cast to - * do the right thing. This is ugly but safe, as the C language - * promises us that the address of the first element of a structure is - * the same as the address of the structure. - */ -typedef struct rcynic_x509_store_ctx { - X509_STORE_CTX ctx; /* Must be first */ - rcynic_ctx_t *rc; - const certinfo_t *subject; -} rcynic_x509_store_ctx_t; - -/** - * Program context that would otherwise be a mess of global variables. - */ -struct rcynic_ctx { - path_t authenticated, old_authenticated, new_authenticated, unauthenticated; - char *jane, *rsync_program; - STACK_OF(validation_status_t) *validation_status; - STACK_OF(rsync_history_t) *rsync_history; - STACK_OF(rsync_ctx_t) *rsync_queue; - STACK_OF(task_t) *task_queue; - int use_syslog, allow_stale_crl, allow_stale_manifest, use_links; - int require_crl_in_manifest, rsync_timeout, priority[LOG_LEVEL_T_MAX]; - int allow_non_self_signed_trust_anchor, allow_object_not_in_manifest; - int max_parallel_fetches, max_retries, retry_wait_min, run_rsync; - int allow_digest_mismatch, allow_crl_digest_mismatch; - int allow_nonconformant_name, allow_ee_without_signedObject; - int allow_1024_bit_ee_key, allow_wrong_cms_si_attributes; - int rsync_early; - unsigned max_select_time; - validation_status_t *validation_status_in_waiting; - validation_status_t *validation_status_root; - log_level_t log_level; - X509_STORE *x509_store; -}; - - - -/* - * Handle NIDs we wish OpenSSL knew about. This is carefully (we - * hope) written to do nothing at all for any NID that OpenSSL knows - * about; the intent is just to add definitions for things OpenSSL - * doesn't know about yet. Of necessity, this is a bit gross, since - * it confounds runtime static variables with predefined macro names, - * but we try to put all the magic associated with this in one place. - * - * In the long run it might be cleaner to generate this with a trivial - * script and put the result in a shared .h file, but this will do for - * the moment. - */ - -#ifndef NID_ad_rpkiManifest -static int NID_ad_rpkiManifest; -#endif - -#ifndef NID_ad_signedObject -static int NID_ad_signedObject; -#endif - -#ifndef NID_ct_ROA -static int NID_ct_ROA; -#endif - -#ifndef NID_ct_rpkiManifest -static int NID_ct_rpkiManifest; -#endif - -#ifndef NID_ct_rpkiGhostbusters -static int NID_ct_rpkiGhostbusters; -#endif - -#ifndef NID_cp_ipAddr_asNumber -static int NID_cp_ipAddr_asNumber; -#endif - -#ifndef NID_id_kp_bgpsec_router -static int NID_id_kp_bgpsec_router; -#endif - -/** - * Missing NIDs, if any. - */ -static const struct { - int *nid; - const char *oid; - const char *sn; - const char *ln; -} missing_nids[] = { - -#ifndef NID_ad_rpkiManifest - {&NID_ad_rpkiManifest, "1.3.6.1.5.5.7.48.10", "id-ad-rpkiManifest", "RPKI Manifest"}, -#endif - -#ifndef NID_ad_signedObject - {&NID_ad_signedObject, "1.3.6.1.5.5.7.48.11", "id-ad-signedObject", "Signed Object"}, -#endif - -#ifndef NID_ct_ROA - {&NID_ct_ROA, "1.2.840.113549.1.9.16.1.24", "id-ct-routeOriginAttestation", "ROA eContent"}, -#endif - -#ifndef NID_ct_rpkiManifest - {&NID_ct_rpkiManifest, "1.2.840.113549.1.9.16.1.26", "id-ct-rpkiManifest", "RPKI Manifest eContent"}, -#endif - -#ifndef NID_ct_rpkiGhostbusters - {&NID_ct_rpkiGhostbusters, "1.2.840.113549.1.9.16.1.35", "id-ct-rpkiGhostbusters", "RPKI Ghostbusters eContent"}, -#endif - -#ifndef NID_cp_ipAddr_asNumber - {&NID_cp_ipAddr_asNumber, "1.3.6.1.5.5.7.14.2", "id-cp-ipAddr-asNumber", "RPKI Certificate Policy"}, -#endif - -#ifndef NID_id_kp_bgpsec_router - {&NID_id_kp_bgpsec_router, "1.3.6.1.5.5.7.3.30", "id-kp-bgpsec-router", "BGPSEC Router Certificate"}, -#endif - -}; - - - -/** - * Subversion ID data. - */ -static const char svn_id[] = "$Id$"; - -/** - * Suffix we use temporarily during the symlink shuffle. Could be - * almost anything, but we want to do the length check early, before - * we waste a lot of work we'll just have to throw away, so we just - * wire in something short and obvious. - */ -static const char authenticated_symlink_suffix[] = ".new"; - -/** - * Constants for comparisions. We can't build these at compile time, - * so they can't be const, but treat them as if they were once - * allocated. - * - * We probably need both a better scheme for naming NID_ replacements - * and a more comprehensive rewrite of how we handle OIDs OpenSSL - * doesn't know about, so that we neither conflict with defined - * symbols nor duplicate effort nor explode if and when OpenSSL adds - * new OIDs (with or without the names we would have used). - */ - -static const ASN1_INTEGER *asn1_zero, *asn1_four_octets, *asn1_twenty_octets; -static int NID_binary_signing_time; - - - -/** - * Handle missing NIDs. - */ -static int -create_missing_nids(void) -{ - int i; - - for (i = 0; i < (int) (sizeof(missing_nids) / sizeof(*missing_nids)); i++) - if ((*missing_nids[i].nid = OBJ_txt2nid(missing_nids[i].oid)) == NID_undef && - (*missing_nids[i].nid = OBJ_create(missing_nids[i].oid, - missing_nids[i].sn, - missing_nids[i].ln)) == NID_undef) - return 0; - - return 1; -} - - - -/** - * Type-safe wrapper around free() to keep safestack macros happy. - */ -static void OPENSSL_STRING_free(OPENSSL_STRING s) -{ - if (s) - free(s); -} - -/** - * Wrapper around an idiom we use with OPENSSL_STRING stacks. There's - * a bug in the current sk_OPENSSL_STRING_delete() macro that casts - * the return value to the wrong type, so we cast it to something - * innocuous here and avoid using that macro elsewhere. - */ -static void sk_OPENSSL_STRING_remove(STACK_OF(OPENSSL_STRING) *sk, const char *str) -{ - OPENSSL_STRING_free((void *) sk_OPENSSL_STRING_delete(sk, sk_OPENSSL_STRING_find(sk, str))); -} - -/** - * Allocate a new validation_status_t object. - */ -static validation_status_t *validation_status_t_new(void) -{ - validation_status_t *v = malloc(sizeof(*v)); - if (v) - memset(v, 0, sizeof(*v)); - return v; -} - -/** - * Type-safe wrapper around free() to keep safestack macros happy. - */ -static void validation_status_t_free(validation_status_t *v) -{ - if (v) - free(v); -} - - - -/** - * Allocate a new rsync_history_t object. - */ -static rsync_history_t *rsync_history_t_new(void) -{ - rsync_history_t *h = malloc(sizeof(*h)); - if (h) - memset(h, 0, sizeof(*h)); - return h; -} - -/** - * Type-safe wrapper around free() to keep safestack macros happy. - */ -static void rsync_history_t_free(rsync_history_t *h) -{ - if (h) - free(h); -} - -/** - * Compare two rsync_history_t objects. - */ -static int rsync_history_cmp(const rsync_history_t * const *a, const rsync_history_t * const *b) -{ - return strcmp((*a)->uri.s, (*b)->uri.s); -} - - - -/** - * Convert a time_t to a printable string in UTC format. - */ -static const char *time_to_string(timestamp_t *ts, const time_t *t) -{ - time_t now; - size_t n; - - assert(ts != NULL); - - if (t == NULL) { - now = time(0); - t = &now; - } - - n = strftime(ts->s, sizeof(ts->s), "%Y-%m-%dT%H:%M:%SZ", gmtime(t)); - assert(n > 0); - - return ts->s; -} - -/* - * GCC attributes to help catch format string errors. - */ - -#ifdef __GNUC__ - -static void logmsg(const rcynic_ctx_t *rc, - const log_level_t level, - const char *fmt, ...) - __attribute__ ((format (printf, 3, 4))); -#endif - -/** - * Logging. - */ -static void vlogmsg(const rcynic_ctx_t *rc, - const log_level_t level, - const char *fmt, - va_list ap) -{ - assert(rc && fmt); - - if (rc->log_level < level) - return; - - if (rc->use_syslog) { - vsyslog(rc->priority[level], fmt, ap); - } else { - char ts[sizeof("00:00:00")+1]; - time_t t = time(0); - strftime(ts, sizeof(ts), "%H:%M:%S", localtime(&t)); - fprintf(stderr, "%s: ", ts); - if (rc->jane) - fprintf(stderr, "%s: ", rc->jane); - vfprintf(stderr, fmt, ap); - putc('\n', stderr); - } -} - -/** - * Logging. - */ -static void logmsg(const rcynic_ctx_t *rc, - const log_level_t level, - const char *fmt, ...) -{ - va_list ap; - va_start(ap, fmt); - vlogmsg(rc, level, fmt, ap); - va_end(ap); -} - -/** - * Print OpenSSL library errors. - */ -static void log_openssl_errors(const rcynic_ctx_t *rc) -{ - const char *data, *file; - unsigned long code; - char error[256]; - int flags, line; - - if (!rc->log_level < log_verbose) - return; - - while ((code = ERR_get_error_line_data(&file, &line, &data, &flags))) { - ERR_error_string_n(code, error, sizeof(error)); - if (data && (flags & ERR_TXT_STRING)) - logmsg(rc, log_sys_err, "OpenSSL error %s:%d: %s: %s", file, line, error, data); - else - logmsg(rc, log_sys_err, "OpenSSL error %s:%d: %s", file, line, error); - } -} - -/** - * Configure logging. - */ -static int configure_logmsg(rcynic_ctx_t *rc, const char *name) -{ - int i; - - assert(rc && name); - - for (i = 0; i < sizeof(log_levels)/sizeof(*log_levels); i++) { - if (!strcmp(name, log_levels[i].name)) { - rc->log_level = log_levels[i].value; - return 1; - } - } - - logmsg(rc, log_usage_err, "Bad log level %s", name); - return 0; -} - -/** - * Configure syslog. - */ -static int configure_syslog(const rcynic_ctx_t *rc, - int *result, - const CODE *table, - const char *name) -{ - assert(result && table && name); - - while (table->c_name && strcmp(table->c_name, name)) - table++; - - if (table->c_name) { - *result = table->c_val; - return 1; - } else { - logmsg(rc, log_usage_err, "Bad syslog code %s", name); - return 0; - } -} - -/** - * Configure boolean variable. - */ -static int configure_boolean(const rcynic_ctx_t *rc, - int *result, - const char *val) -{ - assert(rc && result && val); - - switch (*val) { - case 'y': case 'Y': case 't': case 'T': case '1': - *result = 1; - return 1; - case 'n': case 'N': case 'f': case 'F': case '0': - *result = 0; - return 1; - default: - logmsg(rc, log_usage_err, "Bad boolean value %s", val); - return 0; - } -} - -/** - * Configure integer variable. - */ -static int configure_integer(const rcynic_ctx_t *rc, - int *result, - const char *val) -{ - long res; - char *p; - - assert(rc && result && val); - - res = strtol(val, &p, 10); - - if (*val != '\0' && *p == '\0') { - *result = (int) res; - return 1; - } else { - logmsg(rc, log_usage_err, "Bad integer value %s", val); - return 0; - } -} - -/** - * Configure unsigned integer variable. - */ -static int configure_unsigned_integer(const rcynic_ctx_t *rc, - unsigned *result, - const char *val) -{ - unsigned long res; - char *p; - - assert(rc && result && val); - - res = strtoul(val, &p, 10); - - if (*val != '\0' && *p == '\0') { - *result = (unsigned) res; - return 1; - } else { - logmsg(rc, log_usage_err, "Bad integer value %s", val); - return 0; - } -} - - - -/** - * Make a directory if it doesn't already exist. - */ -static int mkdir_maybe(const rcynic_ctx_t *rc, const path_t *name) -{ - path_t path; - char *s; - - assert(name != NULL); - if (strlen(name->s) >= sizeof(path.s)) { - logmsg(rc, log_data_err, "Pathname %s too long", name->s); - return 0; - } - strcpy(path.s, name->s); - s = path.s[0] == '/' ? path.s + 1 : path.s; - if ((s = strrchr(s, '/')) == NULL) - return 1; - *s = '\0'; - if (!mkdir_maybe(rc, &path)) { - logmsg(rc, log_sys_err, "Failed to make directory %s", path.s); - return 0; - } - if (!access(path.s, F_OK)) - return 1; - logmsg(rc, log_verbose, "Creating directory %s", path.s); - return mkdir(path.s, 0777) == 0; -} - -/** - * strdup() a string and push it onto a stack. - */ -static int sk_OPENSSL_STRING_push_strdup(STACK_OF(OPENSSL_STRING) *sk, const char *str) -{ - OPENSSL_STRING s = strdup(str); - - if (s && sk_OPENSSL_STRING_push(sk, s)) - return 1; - if (s) - free(s); - return 0; -} - -/** - * Compare two URI strings, for OpenSSL STACK operations. - */ - -static int uri_cmp(const char * const *a, const char * const *b) -{ - return strcmp(*a, *b); -} - -/** - * Is string an rsync URI? - */ -static int is_rsync(const char *uri) -{ - return uri && !strncmp(uri, SCHEME_RSYNC, SIZEOF_RSYNC); -} - -/** - * Convert an rsync URI to a filename, checking for evil character - * sequences. NB: This routine can't call mib_increment(), because - * mib_increment() calls it, so errors detected here only go into - * the log, not the MIB. - */ -static int uri_to_filename(const rcynic_ctx_t *rc, - const uri_t *uri, - path_t *path, - const path_t *prefix) -{ - const char *u; - size_t n; - - path->s[0] = '\0'; - - if (!is_rsync(uri->s)) { - logmsg(rc, log_telemetry, "%s is not an rsync URI, not converting to filename", uri->s); - return 0; - } - - u = uri->s + SIZEOF_RSYNC; - n = strlen(u); - - if (u[0] == '/' || u[0] == '.' || strstr(u, "/../") || - (n >= 3 && !strcmp(u + n - 3, "/.."))) { - logmsg(rc, log_data_err, "Dangerous URI %s, not converting to filename", uri->s); - return 0; - } - - if (prefix) - n += strlen(prefix->s); - - if (n >= sizeof(path->s)) { - logmsg(rc, log_data_err, "URI %s too long, not converting to filename", uri->s); - return 0; - } - - if (prefix) { - strcpy(path->s, prefix->s); - strcat(path->s, u); - } else { - strcpy(path->s, u); - } - - return 1; -} - -/** - * Compare filename fields of two FileAndHash structures. - */ -static int FileAndHash_name_cmp(const FileAndHash * const *a, const FileAndHash * const *b) -{ - return strcmp((char *) (*a)->file->data, (char *) (*b)->file->data); -} - -/** - * Get value of code in a validation_status_t. - */ -static int validation_status_get_code(const validation_status_t *v, - const mib_counter_t code) -{ - assert(v && code < MIB_COUNTER_T_MAX); - return (v->events[code / 8] & (1 << (code % 8))) != 0; -} - -/** - * Set value of code in a validation_status_t. - */ -static void validation_status_set_code(validation_status_t *v, - const mib_counter_t code, - int value) -{ - assert(v && code < MIB_COUNTER_T_MAX); - if (value) - v->events[code / 8] |= (1 << (code % 8)); - else - v->events[code / 8] &= ~(1 << (code % 8)); -} - -/** - * validation_status object comparison, for AVL tree rather than - * OpenSSL stacks. - */ -static int -validation_status_cmp(const validation_status_t *node, - const uri_t *uri, - const object_generation_t generation) -{ - int cmp = ((int) node->generation) - ((int) generation); - if (cmp) - return cmp; - else - return strcmp(uri->s, node->uri.s); -} - -/** - * validation_status AVL tree insertion. Adapted from code written by - * Paul Vixie and explictly placed in the public domain using examples - * from the book: "Algorithms & Data Structures," Niklaus Wirth, - * Prentice-Hall, 1986, ISBN 0-13-022005-1. Thanks, Paul! - */ -static validation_status_t * -validation_status_sprout(validation_status_t **node, - int *needs_balancing, - validation_status_t *new_node) -{ -#ifdef AVL_DEBUG -#define AVL_MSG(msg) sprintf(stderr, "AVL_DEBUG: '%s'\n", msg) -#else -#define AVL_MSG(msg) -#endif - - validation_status_t *p1, *p2, *result; - int cmp; - - /* - * Are we grounded? If so, add the node "here" and set the - * rebalance flag, then exit. - */ - if (*node == NULL) { - AVL_MSG("Grounded, adding new node"); - new_node->left_child = NULL; - new_node->right_child = NULL; - new_node->balance = 0; - *node = new_node; - *needs_balancing = 1; - return *node; - } - - /* - * Compare the data. - */ - cmp = validation_status_cmp(*node, &new_node->uri, new_node->generation); - - /* - * If LESS, prepare to move to the left. - */ - if (cmp < 0) { - - AVL_MSG("LESS. sprouting left."); - result = validation_status_sprout(&(*node)->left_child, needs_balancing, new_node); - - if (*needs_balancing) { - AVL_MSG("LESS: left branch has grown longer"); - - switch ((*node)->balance) { - - case 1: - /* - * Right branch WAS longer; balance is ok now. - */ - AVL_MSG("LESS: case 1.. balance restored implicitly"); - (*node)->balance = 0; - *needs_balancing = 0; - break; - - case 0: - /* - * Balance WAS okay; now left branch longer. - */ - AVL_MSG("LESS: case 0.. balnce bad but still ok"); - (*node)->balance = -1; - break; - - case -1: - /* - * Left branch was already too long. Rebalance. - */ - AVL_MSG("LESS: case -1: rebalancing"); - p1 = (*node)->left_child; - - if (p1->balance == -1) { - AVL_MSG("LESS: single LL"); - (*node)->left_child = p1->right_child; - p1->right_child = *node; - (*node)->balance = 0; - *node = p1; - } - - else { - AVL_MSG("LESS: double LR"); - - p2 = p1->right_child; - p1->right_child = p2->left_child; - p2->left_child = p1; - - (*node)->left_child = p2->right_child; - p2->right_child = *node; - - if (p2->balance == -1) - (*node)->balance = 1; - else - (*node)->balance = 0; - - if (p2->balance == 1) - p1->balance = -1; - else - p1->balance = 0; - *node = p2; - } - - (*node)->balance = 0; - *needs_balancing = 0; - } - } - return result; - } - - /* - * If MORE, prepare to move to the right. - */ - if (cmp > 0) { - - AVL_MSG("MORE: sprouting to the right"); - result = validation_status_sprout(&(*node)->right_child, needs_balancing, new_node); - - if (*needs_balancing) { - AVL_MSG("MORE: right branch has grown longer"); - - switch ((*node)->balance) { - - case -1:AVL_MSG("MORE: balance was off, fixed implicitly"); - (*node)->balance = 0; - *needs_balancing = 0; - break; - - case 0: AVL_MSG("MORE: balance was okay, now off but ok"); - (*node)->balance = 1; - break; - - case 1: AVL_MSG("MORE: balance was off, need to rebalance"); - p1 = (*node)->right_child; - - if (p1->balance == 1) { - AVL_MSG("MORE: single RR"); - (*node)->right_child = p1->left_child; - p1->left_child = *node; - (*node)->balance = 0; - *node = p1; - } - - else { - AVL_MSG("MORE: double RL"); - - p2 = p1->left_child; - p1->left_child = p2->right_child; - p2->right_child = p1; - - (*node)->right_child = p2->left_child; - p2->left_child = *node; - - if (p2->balance == 1) - (*node)->balance = -1; - else - (*node)->balance = 0; - - if (p2->balance == -1) - p1->balance = 1; - else - p1->balance = 0; - - *node = p2; - } /*else*/ - (*node)->balance = 0; - *needs_balancing = 0; - } - } - return result; - } - - /* - * Neither more nor less, found existing node matching key, return it. - */ - AVL_MSG("I found it!"); - *needs_balancing = 0; - return *node; - -#undef AVL_MSG -} - -/** - * Add a validation status entry to internal log. - */ -static void log_validation_status(rcynic_ctx_t *rc, - const uri_t *uri, - const mib_counter_t code, - const object_generation_t generation) -{ - validation_status_t *v = NULL; - int needs_balancing = 0; - - assert(rc && uri && code < MIB_COUNTER_T_MAX && generation < OBJECT_GENERATION_MAX); - - if (!rc->validation_status) - return; - - if (code == rsync_transfer_skipped && !rc->run_rsync) - return; - - if (rc->validation_status_in_waiting == NULL && - (rc->validation_status_in_waiting = validation_status_t_new()) == NULL) { - logmsg(rc, log_sys_err, "Couldn't allocate validation status entry for %s", uri->s); - return; - } - - v = rc->validation_status_in_waiting; - memset(v, 0, sizeof(*v)); - v->uri = *uri; - v->generation = generation; - - v = validation_status_sprout(&rc->validation_status_root, &needs_balancing, v); - if (v == rc->validation_status_in_waiting) - rc->validation_status_in_waiting = NULL; - - if (rc->validation_status_in_waiting == NULL && - !sk_validation_status_t_push(rc->validation_status, v)) { - logmsg(rc, log_sys_err, "Couldn't store validation status entry for %s", uri->s); - return; - } - - v->timestamp = time(0); - - if (validation_status_get_code(v, code)) - return; - - validation_status_set_code(v, code, 1); - - logmsg(rc, log_verbose, "Recording \"%s\" for %s%s%s", - (mib_counter_desc[code] - ? mib_counter_desc[code] - : X509_verify_cert_error_string(mib_counter_openssl[code])), - (generation != object_generation_null ? object_generation_label[generation] : ""), - (generation != object_generation_null ? " " : ""), - uri->s); -} - -/** - * Copy or link a file, as the case may be. - */ -static int cp_ln(const rcynic_ctx_t *rc, const path_t *source, const path_t *target) -{ - struct stat statbuf; - struct utimbuf utimebuf; - FILE *in = NULL, *out = NULL; - int c, ok = 0; - - if (rc->use_links) { - (void) unlink(target->s); - ok = link(source->s, target->s) == 0; - if (!ok) - logmsg(rc, log_sys_err, "Couldn't link %s to %s: %s", - source->s, target->s, strerror(errno)); - return ok; - } - - if ((in = fopen(source->s, "rb")) == NULL || - (out = fopen(target->s, "wb")) == NULL) - goto done; - - while ((c = getc(in)) != EOF) - if (putc(c, out) == EOF) - goto done; - - ok = 1; - - done: - ok &= !(in != NULL && fclose(in) == EOF); - ok &= !(out != NULL && fclose(out) == EOF); - - if (!ok) { - logmsg(rc, log_sys_err, "Couldn't copy %s to %s: %s", - source->s, target->s, strerror(errno)); - return ok; - } - - /* - * Perserve the file modification time to allow for detection of - * changed objects in the authenticated directory. Failure to reset - * the times is not optimal, but is also not critical, thus no - * failure return. - */ - if (stat(source->s, &statbuf) < 0 || - (utimebuf.actime = statbuf.st_atime, - utimebuf.modtime = statbuf.st_mtime, - utime(target->s, &utimebuf) < 0)) - logmsg(rc, log_sys_err, "Couldn't copy inode timestamp from %s to %s: %s", - source->s, target->s, strerror(errno)); - - return ok; -} - -/** - * Install an object. - */ -static int install_object(rcynic_ctx_t *rc, - const uri_t *uri, - const path_t *source, - const object_generation_t generation) -{ - path_t target; - - if (!uri_to_filename(rc, uri, &target, &rc->new_authenticated)) { - logmsg(rc, log_data_err, "Couldn't generate installation name for %s", uri->s); - return 0; - } - - if (!mkdir_maybe(rc, &target)) { - logmsg(rc, log_sys_err, "Couldn't create directory for %s", target.s); - return 0; - } - - if (!cp_ln(rc, source, &target)) - return 0; - log_validation_status(rc, uri, object_accepted, generation); - return 1; -} - -/** - * AVL tree lookup for validation status objects. - */ -static validation_status_t * -validation_status_find(validation_status_t *node, - const uri_t *uri, - const object_generation_t generation) -{ - int cmp; - - while (node != NULL && (cmp = validation_status_cmp(node, uri, generation)) != 0) - node = cmp < 0 ? node->left_child : node->right_child; - - return node; -} - -/** - * Check whether we have a validation status entry corresponding to a - * given filename. This is intended for use during pruning the - * unauthenticated tree, so it only checks the current generation. - */ -static int -validation_status_find_filename(const rcynic_ctx_t *rc, - const char *filename) -{ - uri_t uri; - - if (strlen(filename) + SIZEOF_RSYNC >= sizeof(uri.s)) - return 0; - - strcpy(uri.s, SCHEME_RSYNC); - strcat(uri.s, filename); - - return validation_status_find(rc->validation_status_root, &uri, object_generation_current) != NULL; -} - -/** - * Figure out whether we already have a good copy of an object. This - * is a little more complicated than it sounds, because we might have - * failed the current generation and accepted the backup due to having - * followed the old CA certificate chain first during a key rollover. - * So if this check is of the current object and we have not already - * accepted the current object for this URI, we need to recheck. - * - * We also handle logging when we decide that we do need to check, so - * that the caller doesn't need to concern itself with why we thought - * the check was necessary. - */ -static int skip_checking_this_object(rcynic_ctx_t *rc, - const uri_t *uri, - const object_generation_t generation) -{ - validation_status_t *v = NULL; - path_t path; - - assert(rc && uri && rc->validation_status); - - if (!uri_to_filename(rc, uri, &path, &rc->new_authenticated)) - return 1; - - if (access(path.s, R_OK)) { - logmsg(rc, log_telemetry, "Checking %s", uri->s); - return 0; - } - - if (generation != object_generation_current) - return 1; - - v = validation_status_find(rc->validation_status_root, uri, generation); - - if (v != NULL && validation_status_get_code(v, object_accepted)) - return 1; - - log_validation_status(rc, uri, rechecking_object, generation); - logmsg(rc, log_telemetry, "Rechecking %s", uri->s); - return 0; -} - - - -/** - * Check str for a suffix. - */ -static int endswith(const char *str, const char *suffix) -{ - size_t len_str, len_suffix; - assert(str != NULL && suffix != NULL); - len_str = strlen(str); - len_suffix = strlen(suffix); - return len_str >= len_suffix && !strcmp(str + len_str - len_suffix, suffix); -} - -/** - * Check str for a prefix. - */ -static int startswith(const char *str, const char *prefix) -{ - size_t len_str, len_prefix; - assert(str != NULL && prefix != NULL); - len_str = strlen(str); - len_prefix = strlen(prefix); - return len_str >= len_prefix && !strncmp(str, prefix, len_prefix); -} - -/** - * Convert a filename to a file:// URI, for logging. - */ -static void filename_to_uri(uri_t *uri, - const char *fn) -{ - assert(sizeof("file://") < sizeof(uri->s)); - strcpy(uri->s, "file://"); - if (*fn != '/') { - if (getcwd(uri->s + strlen(uri->s), sizeof(uri->s) - strlen(uri->s)) == NULL || - (!endswith(uri->s, "/") && strlen(uri->s) >= sizeof(uri->s) - 1)) - uri->s[0] = '\0'; - else - strcat(uri->s, "/"); - } - if (uri->s[0] != '\0' && strlen(uri->s) + strlen(fn) < sizeof(uri->s)) - strcat(uri->s, fn); - else - uri->s[0] = '\0'; -} - -/** - * Set a directory name, adding or stripping trailing slash as needed. - */ -static int set_directory(const rcynic_ctx_t *rc, path_t *out, const char *in, const int want_slash) -{ - int has_slash, need_slash; - size_t n; - - assert(rc && in && out); - - n = strlen(in); - - if (n == 0) { - logmsg(rc, log_usage_err, "Empty path"); - return 0; - } - - has_slash = in[n - 1] == '/'; - - need_slash = want_slash && !has_slash; - - if (n + need_slash + 1 > sizeof(out->s)) { - logmsg(rc, log_usage_err, "Path \"%s\" too long", in); - return 0; - } - - strcpy(out->s, in); - if (need_slash) - strcat(out->s, "/"); - else if (has_slash && !want_slash) - out->s[n - 1] = '\0'; - - return 1; -} - -/** - * Test whether a filesystem path points to a directory. - */ -static int is_directory(const path_t *name) -{ - struct stat st; - - assert(name); - return lstat(name->s, &st) == 0 && S_ISDIR(st.st_mode); -} - -/** - * Remove a directory tree, like rm -rf. - */ -static int rm_rf(const path_t *name) -{ - path_t path; - struct dirent *d; - DIR *dir; - int ret = 0; - - assert(name); - - if (!is_directory(name)) - return unlink(name->s) == 0; - - if ((dir = opendir(name->s)) == NULL) - return 0; - - while ((d = readdir(dir)) != NULL) { - if (!strcmp(d->d_name, ".") || !strcmp(d->d_name, "..")) - continue; - if (snprintf(path.s, sizeof(path.s), "%s/%s", name->s, d->d_name) >= sizeof(path.s)) - goto done; - if (unlink(path.s) == 0) - continue; - else if (rm_rf(&path)) - continue; - else - goto done; - } - - ret = rmdir(name->s) == 0; - - done: - closedir(dir); - return ret; -} - -/** - * Construct names for the directories not directly settable by the - * user. - * - * This function also checks for an old-style rc->authenticated - * directory, to simplify upgrade from older versions of rcynic. - */ -static int construct_directory_names(rcynic_ctx_t *rc) -{ - struct stat st; - ssize_t n; - path_t p; - time_t t = time(0); - - p = rc->authenticated; - - n = strlen(p.s); - - if (n + sizeof(authenticated_symlink_suffix) >= sizeof(p.s)) { - logmsg(rc, log_usage_err, "Symlink name would be too long"); - return 0; - } - - if (strftime(p.s + n, sizeof(p.s) - n - 1, ".%Y-%m-%dT%H:%M:%SZ", gmtime(&t)) == 0) { - logmsg(rc, log_usage_err, "Generated path with timestamp would be too long"); - return 0; - } - - if (!set_directory(rc, &rc->new_authenticated, p.s, 1)) - return 0; - - if (!set_directory(rc, &rc->old_authenticated, rc->authenticated.s, 1)) - return 0; - - if (lstat(rc->authenticated.s, &st) == 0 && S_ISDIR((st.st_mode)) && - strlen(rc->authenticated.s) + sizeof(".old") < sizeof(p.s)) { - p = rc->authenticated; - strcat(p.s, ".old"); - rm_rf(&p); - (void) rename(rc->authenticated.s, p.s); - } - - if (lstat(rc->authenticated.s, &st) == 0 && S_ISDIR(st.st_mode)) { - logmsg(rc, log_usage_err, - "Existing %s directory is in the way, please remove it", - rc->authenticated.s); - return 0; - } - - return 1; -} - -/** - * Do final symlink shuffle and cleanup of output directories. - */ -static int finalize_directories(const rcynic_ctx_t *rc) -{ - path_t path, real_old, real_new; - const char *dir; - glob_t g; - int i; - - if (!realpath(rc->old_authenticated.s, real_old.s)) - real_old.s[0] = '\0'; - - if (!realpath(rc->new_authenticated.s, real_new.s)) - real_new.s[0] = '\0'; - - assert(real_new.s[0] && real_new.s[strlen(real_new.s) - 1] != '/'); - - if ((dir = strrchr(real_new.s, '/')) == NULL) - dir = real_new.s; - else - dir++; - - path = rc->authenticated; - - if (strlen(path.s) + sizeof(authenticated_symlink_suffix) >= sizeof(path.s)) - return 0; - strcat(path.s, authenticated_symlink_suffix); - - (void) unlink(path.s); - - if (symlink(dir, path.s) < 0) { - logmsg(rc, log_sys_err, "Couldn't link %s to %s: %s", - path.s, dir, strerror(errno)); - return 0; - } - - if (rename(path.s, rc->authenticated.s) < 0) { - logmsg(rc, log_sys_err, "Couldn't rename %s to %s: %s", - path.s, rc->authenticated.s, strerror(errno)); - return 0; - } - - if (real_old.s[0] && strlen(rc->authenticated.s) + sizeof(".old") < sizeof(path.s)) { - assert(real_old.s[strlen(real_old.s) - 1] != '/'); - - path = rc->authenticated; - strcat(path.s, ".old"); - - (void) unlink(path.s); - - if ((dir = strrchr(real_old.s, '/')) == NULL) - dir = real_old.s; - else - dir++; - - (void) symlink(dir, path.s); - } - - path = rc->authenticated; - assert(strlen(path.s) + sizeof(".*") < sizeof(path.s)); - strcat(path.s, ".*"); - - memset(&g, 0, sizeof(g)); - - if (real_new.s[0] && glob(path.s, 0, 0, &g) == 0) { - for (i = 0; i < g.gl_pathc; i++) - if (realpath(g.gl_pathv[i], path.s) && - strcmp(path.s, real_old.s) && - strcmp(path.s, real_new.s)) - rm_rf(&path); - globfree(&g); - } - - return 1; -} - - - -/** - * Test whether a pair of URIs "conflict", that is, whether attempting - * to rsync both of them at the same time in parallel might cause - * unpredictable behavior. Might need a better name for this test. - * - * Returns non-zero iff the two URIs "conflict". - */ -static int conflicting_uris(const uri_t *a, const uri_t *b) -{ - size_t len_a, len_b; - - assert(a && is_rsync(a->s) && b && is_rsync(b->s)); - - len_a = strlen(a->s); - len_b = strlen(b->s); - - assert(len_a < sizeof(a->s) && len_b < sizeof(b->s)); - - return !strncmp(a->s, b->s, len_a < len_b ? len_a : len_b); -} - - - -/** - * Read non-directory filenames from a directory, so we can check to - * see what's missing from a manifest. - */ -static STACK_OF(OPENSSL_STRING) *directory_filenames(const rcynic_ctx_t *rc, - const walk_state_t state, - const uri_t *uri) -{ - STACK_OF(OPENSSL_STRING) *result = NULL; - path_t dpath, fpath; - const path_t *prefix = NULL; - DIR *dir = NULL; - struct dirent *d; - int ok = 0; - - assert(rc && uri); - - switch (state) { - case walk_state_current: - prefix = &rc->unauthenticated; - break; - case walk_state_backup: - prefix = &rc->old_authenticated; - break; - default: - goto done; - } - - if (!uri_to_filename(rc, uri, &dpath, prefix) || - (dir = opendir(dpath.s)) == NULL || - (result = sk_OPENSSL_STRING_new(uri_cmp)) == NULL) - goto done; - - while ((d = readdir(dir)) != NULL) - if (snprintf(fpath.s, sizeof(fpath.s), "%s/%s", dpath.s, d->d_name) >= sizeof(fpath.s)) { - logmsg(rc, log_data_err, "Local path name %s/%s too long", dpath.s, d->d_name); - goto done; - } - else if (!is_directory(&fpath) && !sk_OPENSSL_STRING_push_strdup(result, d->d_name)) { - logmsg(rc, log_sys_err, "sk_OPENSSL_STRING_push_strdup() failed, probably memory exhaustion"); - goto done; - } - - ok = 1; - - done: - if (dir != NULL) - closedir(dir); - - if (ok) - return result; - - sk_OPENSSL_STRING_pop_free(result, OPENSSL_STRING_free); - return NULL; -} - - - -/** - * Increment walk context reference count. - */ -static void walk_ctx_attach(walk_ctx_t *w) -{ - if (w != NULL) { - w->refcount++; - assert(w->refcount != 0); - } -} - -/** - * Decrement walk context reference count; freeing the context if the - * reference count is now zero. - */ -static void walk_ctx_detach(walk_ctx_t *w) -{ - if (w != NULL && --(w->refcount) == 0) { - assert(w->refcount == 0); - X509_free(w->cert); - Manifest_free(w->manifest); - sk_X509_free(w->certs); - sk_X509_CRL_pop_free(w->crls, X509_CRL_free); - sk_OPENSSL_STRING_pop_free(w->filenames, OPENSSL_STRING_free); - free(w); - } -} - -/** - * Return top context of a walk context stack. - */ -static walk_ctx_t *walk_ctx_stack_head(STACK_OF(walk_ctx_t) *wsk) -{ - return sk_walk_ctx_t_value(wsk, sk_walk_ctx_t_num(wsk) - 1); -} - -/** - * Whether we're done iterating over a walk context. Think of this as - * the thing you call (negated) in the second clause of a conceptual - * "for" loop. - */ -static int walk_ctx_loop_done(STACK_OF(walk_ctx_t) *wsk) -{ - walk_ctx_t *w = walk_ctx_stack_head(wsk); - return wsk == NULL || w == NULL || w->state >= walk_state_done; -} - -/** - * Walk context iterator. Think of this as the thing you call in the - * third clause of a conceptual "for" loop: this reinitializes as - * necessary for the next pass through the loop. - * - * General idea here is that we have several state variables in a walk - * context which collectively define the current pass, product URI, - * etc, and we want to be able to iterate through this sequence via - * the event system. So this function steps to the next state. - * - * Conceptually, w->manifest->fileList and w->filenames form a single - * array with index w->manifest_iteration + w->filename_iteration. - * Beware of fencepost errors, I've gotten this wrong once already. - * Slightly odd coding here is to make it easier to check this. - */ -static void walk_ctx_loop_next(const rcynic_ctx_t *rc, STACK_OF(walk_ctx_t) *wsk) -{ - walk_ctx_t *w = walk_ctx_stack_head(wsk); - int n_manifest, n_filenames; - - assert(rc && wsk && w); - - assert(w->manifest_iteration >= 0 && w->filename_iteration >= 0); - - n_manifest = w->manifest ? sk_FileAndHash_num(w->manifest->fileList) : 0; - n_filenames = w->filenames ? sk_OPENSSL_STRING_num(w->filenames) : 0; - - if (w->manifest_iteration + w->filename_iteration < n_manifest + n_filenames) { - if (w->manifest_iteration < n_manifest) - w->manifest_iteration++; - else - w->filename_iteration++; - } - - assert(w->manifest_iteration <= n_manifest && w->filename_iteration <= n_filenames); - - if (w->manifest_iteration + w->filename_iteration < n_manifest + n_filenames) - return; - - while (!walk_ctx_loop_done(wsk)) { - w->state++; - w->manifest_iteration = 0; - w->filename_iteration = 0; - sk_OPENSSL_STRING_pop_free(w->filenames, OPENSSL_STRING_free); - w->filenames = directory_filenames(rc, w->state, &w->certinfo.sia); - if (w->manifest != NULL || w->filenames != NULL) - return; - } -} - -static int check_manifest(rcynic_ctx_t *rc, STACK_OF(walk_ctx_t) *wsk); - -/** - * Loop initializer for walk context. Think of this as the thing you - * call in the first clause of a conceptual "for" loop. - */ -static void walk_ctx_loop_init(rcynic_ctx_t *rc, STACK_OF(walk_ctx_t) *wsk) -{ - walk_ctx_t *w = walk_ctx_stack_head(wsk); - - assert(rc && wsk && w && w->state == walk_state_ready); - - if (!w->manifest && !check_manifest(rc, wsk)) { - /* - * Simple failure to find a manifest doesn't get here. This is - * for manifest failures that cause us to reject all of this - * certificate's products due to policy knob settings. - */ - w->state = walk_state_done; - return; - } - - if (!w->manifest) - logmsg(rc, log_telemetry, "Couldn't get manifest %s, blundering onward", w->certinfo.manifest.s); - - w->manifest_iteration = 0; - w->filename_iteration = 0; - w->state++; - assert(w->state == walk_state_current); - - assert(w->filenames == NULL); - w->filenames = directory_filenames(rc, w->state, &w->certinfo.sia); - - w->stale_manifest = w->manifest != NULL && X509_cmp_current_time(w->manifest->nextUpdate) < 0; - - while (!walk_ctx_loop_done(wsk) && - (w->manifest == NULL || w->manifest_iteration >= sk_FileAndHash_num(w->manifest->fileList)) && - (w->filenames == NULL || w->filename_iteration >= sk_OPENSSL_STRING_num(w->filenames))) - walk_ctx_loop_next(rc, wsk); -} - -/** - * Extract URI and hash values from walk context. - */ -static int walk_ctx_loop_this(const rcynic_ctx_t *rc, - STACK_OF(walk_ctx_t) *wsk, - uri_t *uri, - const unsigned char **hash, - size_t *hashlen) -{ - const walk_ctx_t *w = walk_ctx_stack_head(wsk); - const char *name = NULL; - FileAndHash *fah = NULL; - - assert(rc && wsk && w && uri && hash && hashlen); - - if (w->manifest != NULL && w->manifest_iteration < sk_FileAndHash_num(w->manifest->fileList)) { - fah = sk_FileAndHash_value(w->manifest->fileList, w->manifest_iteration); - name = (const char *) fah->file->data; - } else if (w->filenames != NULL && w->filename_iteration < sk_OPENSSL_STRING_num(w->filenames)) { - name = sk_OPENSSL_STRING_value(w->filenames, w->filename_iteration); - } - - if (name == NULL) { - logmsg(rc, log_sys_err, "Can't find a URI in walk context, this shouldn't happen: state %d, manifest_iteration %d, filename_iteration %d", - (int) w->state, w->manifest_iteration, w->filename_iteration); - return 0; - } - - if (strlen(w->certinfo.sia.s) + strlen(name) >= sizeof(uri->s)) { - logmsg(rc, log_data_err, "URI %s%s too long, skipping", w->certinfo.sia.s, uri->s); - return 0; - } - - strcpy(uri->s, w->certinfo.sia.s); - strcat(uri->s, name); - - if (fah != NULL) { - sk_OPENSSL_STRING_remove(w->filenames, name); - *hash = fah->hash->data; - *hashlen = fah->hash->length; - } else { - *hash = NULL; - *hashlen = 0; - } - - return 1; -} - -/** - * Create a new walk context stack. - */ -static STACK_OF(walk_ctx_t) *walk_ctx_stack_new(void) -{ - return sk_walk_ctx_t_new_null(); -} - -/** - * Push a walk context onto a walk context stack, return the new context. - */ -static walk_ctx_t *walk_ctx_stack_push(STACK_OF(walk_ctx_t) *wsk, - X509 *x, - const certinfo_t *certinfo) -{ - walk_ctx_t *w; - - if (x == NULL || - (certinfo == NULL) != (sk_walk_ctx_t_num(wsk) == 0) || - (w = malloc(sizeof(*w))) == NULL) - return NULL; - - memset(w, 0, sizeof(*w)); - w->cert = x; - if (certinfo != NULL) - w->certinfo = *certinfo; - else - memset(&w->certinfo, 0, sizeof(w->certinfo)); - - if (!sk_walk_ctx_t_push(wsk, w)) { - free(w); - return NULL; - } - - walk_ctx_attach(w); - return w; -} - -/** - * Pop and discard a walk context from a walk context stack. - */ -static void walk_ctx_stack_pop(STACK_OF(walk_ctx_t) *wsk) -{ - walk_ctx_detach(sk_walk_ctx_t_pop(wsk)); -} - -/** - * Clone a stack of walk contexts. - */ -static STACK_OF(walk_ctx_t) *walk_ctx_stack_clone(STACK_OF(walk_ctx_t) *old_wsk) -{ - STACK_OF(walk_ctx_t) *new_wsk; - int i; - if (old_wsk == NULL || (new_wsk = sk_walk_ctx_t_dup(old_wsk)) == NULL) - return NULL; - for (i = 0; i < sk_walk_ctx_t_num(new_wsk); i++) - walk_ctx_attach(sk_walk_ctx_t_value(new_wsk, i)); - return new_wsk; -} - -/** - * Extract certificate stack from walk context stack. Returns a newly - * created STACK_OF(X509) pointing to the existing cert objects. - * - * NB: This is a shallow copy, so use sk_X509_free() to free it, not - * sk_X509_pop_free(). - */ -static STACK_OF(X509) *walk_ctx_stack_certs(const rcynic_ctx_t *rc, - STACK_OF(walk_ctx_t) *wsk) -{ - STACK_OF(X509) *xsk = sk_X509_new_null(); - walk_ctx_t *w; - int i; - - assert(rc); - - for (i = 0; i < sk_walk_ctx_t_num(wsk); i++) - if ((w = sk_walk_ctx_t_value(wsk, i)) == NULL || - (w->cert != NULL && !sk_X509_push(xsk, w->cert))) - goto fail; - - return xsk; - - fail: - logmsg(rc, log_sys_err, "Couldn't clone walk_ctx_stack, memory exhausted?"); - sk_X509_free(xsk); - return NULL; -} - -/** - * Free a walk context stack, decrementing reference counts of each - * frame on it. - */ -static void walk_ctx_stack_free(STACK_OF(walk_ctx_t) *wsk) -{ - sk_walk_ctx_t_pop_free(wsk, walk_ctx_detach); -} - - - -static int rsync_count_running(const rcynic_ctx_t *); - -/** - * Add a task to the task queue. - */ -static int task_add(const rcynic_ctx_t *rc, - void (*handler)(rcynic_ctx_t *, void *), - void *cookie) -{ - task_t *t = malloc(sizeof(*t)); - - assert(rc && rc->task_queue && handler); - - assert(rsync_count_running(rc) <= rc->max_parallel_fetches); - - if (!t) - return 0; - - t->handler = handler; - t->cookie = cookie; - - if (sk_task_t_push(rc->task_queue, t)) - return 1; - - free(t); - return 0; -} - -/** - * Run tasks until queue is empty. - */ -static void task_run_q(rcynic_ctx_t *rc) -{ - task_t *t; - assert(rc && rc->task_queue); - while ((t = sk_task_t_shift(rc->task_queue)) != NULL) { - t->handler(rc, t->cookie); - free(t); - } -} - - - -/** - * Check cache of whether we've already fetched a particular URI. - */ -static rsync_history_t *rsync_history_uri(const rcynic_ctx_t *rc, - const uri_t *uri) -{ - rsync_history_t h; - char *s; - int i; - - assert(rc && uri && rc->rsync_history); - - if (!is_rsync(uri->s)) - return NULL; - - h.uri = *uri; - - while ((s = strrchr(h.uri.s, '/')) != NULL && s[1] == '\0') - *s = '\0'; - - while ((i = sk_rsync_history_t_find(rc->rsync_history, &h)) < 0) { - if ((s = strrchr(h.uri.s, '/')) == NULL || - (s - h.uri.s) < SIZEOF_RSYNC) - return NULL; - *s = '\0'; - } - - return sk_rsync_history_t_value(rc->rsync_history, i); -} - -/** - * Record that we've already attempted to synchronize a particular - * rsync URI. - */ -static void rsync_history_add(const rcynic_ctx_t *rc, - const rsync_ctx_t *ctx, - const rsync_status_t status) -{ - int final_slash = 0; - rsync_history_t *h; - uri_t uri; - size_t n; - char *s; - - assert(rc && ctx && rc->rsync_history && is_rsync(ctx->uri.s)); - - uri = ctx->uri; - - while ((s = strrchr(uri.s, '/')) != NULL && s[1] == '\0') { - final_slash = 1; - *s = '\0'; - } - - if (status != rsync_status_done) { - - n = SIZEOF_RSYNC + strcspn(uri.s + SIZEOF_RSYNC, "/"); - assert(n < sizeof(uri.s)); - uri.s[n] = '\0'; - final_slash = 1; - - if ((h = rsync_history_uri(rc, &uri)) != NULL) { - assert(h->status != rsync_status_done); - return; - } - } - - if ((h = rsync_history_t_new()) != NULL) { - h->uri = uri; - h->status = status; - h->started = ctx->started; - h->finished = time(0); - h->final_slash = final_slash; - } - - if (h == NULL || !sk_rsync_history_t_push(rc->rsync_history, h)) { - rsync_history_t_free(h); - logmsg(rc, log_sys_err, - "Couldn't add %s to rsync_history, blundering onwards", uri.s); - } -} - - - -/** - * Return count of how many rsync contexts are in running. - */ -static int rsync_count_running(const rcynic_ctx_t *rc) -{ - const rsync_ctx_t *ctx; - int i, n = 0; - - assert(rc && rc->rsync_queue); - - for (i = 0; (ctx = sk_rsync_ctx_t_value(rc->rsync_queue, i)) != NULL; ++i) { - switch (ctx->state) { - case rsync_state_running: - case rsync_state_closed: - case rsync_state_terminating: - n++; - default: - continue; - } - } - - return n; -} - -/** - * Test whether an rsync context conflicts with anything that's - * currently runable. - */ -static int rsync_conflicts(const rcynic_ctx_t *rc, - const rsync_ctx_t *ctx) -{ - const rsync_ctx_t *c; - int i; - - assert(rc && ctx && rc->rsync_queue); - - for (i = 0; (c = sk_rsync_ctx_t_value(rc->rsync_queue, i)) != NULL; ++i) - if (c != ctx && - (c->state == rsync_state_initial || - c->state == rsync_state_running) && - conflicting_uris(&c->uri, &ctx->uri)) - return 1; - - return 0; -} - -/** - * Test whether a rsync context is runable at this time. - */ -static int rsync_runable(const rcynic_ctx_t *rc, - const rsync_ctx_t *ctx) -{ - assert(rc && ctx); - - switch (ctx->state) { - - case rsync_state_initial: - case rsync_state_running: - return 1; - - case rsync_state_retry_wait: - return ctx->deadline <= time(0); - - case rsync_state_closed: - case rsync_state_terminating: - return 0; - - case rsync_state_conflict_wait: - return !rsync_conflicts(rc, ctx); - - default: - break; - } - - return 0; -} - -/** - * Return count of runable rsync contexts. - */ -static int rsync_count_runable(const rcynic_ctx_t *rc) -{ - const rsync_ctx_t *ctx; - int i, n = 0; - - assert(rc && rc->rsync_queue); - - for (i = 0; (ctx = sk_rsync_ctx_t_value(rc->rsync_queue, i)) != NULL; ++i) - if (rsync_runable(rc, ctx)) - n++; - - return n; -} - -/** - * Call rsync context handler, if one is set. - */ -static void rsync_call_handler(rcynic_ctx_t *rc, - rsync_ctx_t *ctx, - const rsync_status_t status) -{ - if (!ctx) - return; - - switch (status) { - - case rsync_status_pending: - case rsync_status_done: - break; - - case rsync_status_failed: - log_validation_status(rc, &ctx->uri, rsync_transfer_failed, object_generation_null); - break; - - case rsync_status_timed_out: - log_validation_status(rc, &ctx->uri, rsync_transfer_timed_out, object_generation_null); - break; - - case rsync_status_skipped: - log_validation_status(rc, &ctx->uri, rsync_transfer_skipped, object_generation_null); - break; - } - - if (ctx->handler) - ctx->handler(rc, ctx, status, &ctx->uri, ctx->cookie); -} - -/** - * Run an rsync process. - */ -static void rsync_run(rcynic_ctx_t *rc, - rsync_ctx_t *ctx) -{ - static const char * const rsync_cmd[] = { - "rsync", "--update", "--times", "--copy-links", "--itemize-changes" - }; - static const char * const rsync_tree_args[] = { - "--recursive", "--delete" - }; - - const char *argv[10]; - path_t path; - int i, argc = 0, flags, pipe_fds[2]; - - pipe_fds[0] = pipe_fds[1] = -1; - - assert(rc && ctx && ctx->pid == 0 && ctx->state != rsync_state_running && rsync_runable(rc, ctx)); - - if (rsync_history_uri(rc, &ctx->uri)) { - logmsg(rc, log_verbose, "Late rsync cache hit for %s", ctx->uri.s); - rsync_call_handler(rc, ctx, rsync_status_done); - (void) sk_rsync_ctx_t_delete_ptr(rc->rsync_queue, ctx); - free(ctx); - return; - } - - assert(rsync_count_running(rc) < rc->max_parallel_fetches); - - logmsg(rc, log_telemetry, "Fetching %s", ctx->uri.s); - - memset(argv, 0, sizeof(argv)); - - for (i = 0; i < sizeof(rsync_cmd)/sizeof(*rsync_cmd); i++) { - assert(argc < sizeof(argv)/sizeof(*argv)); - argv[argc++] = rsync_cmd[i]; - } - if (endswith(ctx->uri.s, "/")) { - for (i = 0; i < sizeof(rsync_tree_args)/sizeof(*rsync_tree_args); i++) { - assert(argc < sizeof(argv)/sizeof(*argv)); - argv[argc++] = rsync_tree_args[i]; - } - } - - if (rc->rsync_program) - argv[0] = rc->rsync_program; - - if (!uri_to_filename(rc, &ctx->uri, &path, &rc->unauthenticated)) { - logmsg(rc, log_data_err, "Couldn't extract filename from URI: %s", ctx->uri.s); - goto lose; - } - - assert(argc < sizeof(argv)/sizeof(*argv)); - argv[argc++] = ctx->uri.s; - - assert(argc < sizeof(argv)/sizeof(*argv)); - argv[argc++] = path.s; - - if (!mkdir_maybe(rc, &path)) { - logmsg(rc, log_sys_err, "Couldn't make target directory: %s", path.s); - goto lose; - } - - for (i = 0; i < argc; i++) - logmsg(rc, log_debug, "rsync argv[%d]: %s", i, argv[i]); - - if (pipe(pipe_fds) < 0) { - logmsg(rc, log_sys_err, "pipe() failed: %s", strerror(errno)); - goto lose; - } - - switch ((ctx->pid = vfork())) { - - case -1: - logmsg(rc, log_sys_err, "vfork() failed: %s", strerror(errno)); - goto lose; - - case 0: - /* - * Child - */ -#define whine(msg) ((void) write(2, msg, sizeof(msg) - 1)) - if (close(pipe_fds[0]) < 0) - whine("close(pipe_fds[0]) failed\n"); - else if (dup2(pipe_fds[1], 1) < 0) - whine("dup2(pipe_fds[1], 1) failed\n"); - else if (dup2(pipe_fds[1], 2) < 0) - whine("dup2(pipe_fds[1], 2) failed\n"); - else if (close(pipe_fds[1]) < 0) - whine("close(pipe_fds[1]) failed\n"); - else if (execvp(argv[0], (char * const *) argv) < 0) - whine("execvp(argv[0], (char * const *) argv) failed\n"); - whine("last system error: "); - write(2, strerror(errno), strlen(strerror(errno))); - whine("\n"); - _exit(1); -#undef whine - - default: - /* - * Parent - */ - ctx->fd = pipe_fds[0]; - if ((flags = fcntl(ctx->fd, F_GETFL, 0)) == -1 || - fcntl(ctx->fd, F_SETFL, flags | O_NONBLOCK) == -1) { - logmsg(rc, log_sys_err, "fcntl(ctx->fd, F_[GS]ETFL, O_NONBLOCK) failed: %s", - strerror(errno)); - goto lose; - } - (void) close(pipe_fds[1]); - ctx->state = rsync_state_running; - ctx->problem = rsync_problem_none; - if (!ctx->started) - ctx->started = time(0); - if (rc->rsync_timeout) - ctx->deadline = time(0) + rc->rsync_timeout; - logmsg(rc, log_verbose, "Subprocess %u started, queued %d, runable %d, running %d, max %d, URI %s", - (unsigned) ctx->pid, sk_rsync_ctx_t_num(rc->rsync_queue), rsync_count_runable(rc), rsync_count_running(rc), rc->max_parallel_fetches, ctx->uri.s); - rsync_call_handler(rc, ctx, rsync_status_pending); - return; - - } - - lose: - if (pipe_fds[0] != -1) - (void) close(pipe_fds[0]); - if (pipe_fds[1] != -1) - (void) close(pipe_fds[1]); - if (rc->rsync_queue && ctx) - (void) sk_rsync_ctx_t_delete_ptr(rc->rsync_queue, ctx); - rsync_call_handler(rc, ctx, rsync_status_failed); - if (ctx->pid > 0) { - (void) kill(ctx->pid, SIGKILL); - ctx->pid = 0; - } -} - -/** - * Process one line of rsync's output. This is a separate function - * primarily to centralize scraping for magic error strings. - */ -static void do_one_rsync_log_line(const rcynic_ctx_t *rc, - rsync_ctx_t *ctx) -{ - unsigned u; - char *s; - - /* - * Send line to our log unless it's empty. - */ - if (ctx->buffer[strspn(ctx->buffer, " \t\n\r")] != '\0') - logmsg(rc, log_telemetry, "rsync[%u]: %s", ctx->pid, ctx->buffer); - - /* - * Check for magic error strings - */ - if ((s = strstr(ctx->buffer, "@ERROR: max connections")) != NULL) { - ctx->problem = rsync_problem_refused; - if (sscanf(s, "@ERROR: max connections (%u) reached -- try again later", &u) == 1) - logmsg(rc, log_verbose, "Subprocess %u reported limit of %u for %s", ctx->pid, u, ctx->uri.s); - } -} - -/** - * Construct select() arguments. - */ -static int rsync_construct_select(const rcynic_ctx_t *rc, - const time_t now, - fd_set *rfds, - struct timeval *tv) -{ - rsync_ctx_t *ctx; - time_t when = 0; - int i, n = 0; - - assert(rc && rc->rsync_queue && rfds && tv && rc->max_select_time >= 0); - - FD_ZERO(rfds); - - for (i = 0; (ctx = sk_rsync_ctx_t_value(rc->rsync_queue, i)) != NULL; ++i) { - -#if 0 - logmsg(rc, log_debug, "+++ ctx[%d] pid %d fd %d state %s started %lu deadline %lu", - i, ctx->pid, ctx->fd, rsync_state_label[ctx->state], - (unsigned long) ctx->started, (unsigned long) ctx->deadline); -#endif - - switch (ctx->state) { - - case rsync_state_running: - assert(ctx->fd >= 0); - FD_SET(ctx->fd, rfds); - if (ctx->fd > n) - n = ctx->fd; - if (!rc->rsync_timeout) - continue; - /* Fall through */ - - case rsync_state_retry_wait: - if (when == 0 || ctx->deadline < when) - when = ctx->deadline; - /* Fall through */ - - default: - continue; - } - } - - if (!when) - tv->tv_sec = rc->max_select_time; - else if (when < now) - tv->tv_sec = 0; - else if (when < now + rc->max_select_time) - tv->tv_sec = when - now; - else - tv->tv_sec = rc->max_select_time; - tv->tv_usec = 0; - return n; -} - -/** - * Convert rsync_status_t to mib_counter_t. - * - * Maybe some day this will go away and we won't be carrying - * essentially the same information in two different databases, but - * for now I'll settle for cleaning up the duplicate code logic. - */ -static mib_counter_t rsync_status_to_mib_counter(rsync_status_t status) -{ - switch (status) { - case rsync_status_done: return rsync_transfer_succeeded; - case rsync_status_timed_out: return rsync_transfer_timed_out; - case rsync_status_failed: return rsync_transfer_failed; - case rsync_status_skipped: return rsync_transfer_skipped; - default: - /* - * Keep GCC from whining about untested cases. - */ - assert(status == rsync_status_done || - status == rsync_status_timed_out || - status == rsync_status_failed || - status == rsync_status_skipped); - return rsync_transfer_failed; - } -} - -/** - * Manager for queue of rsync tasks in progress. - * - * General plan here is to process one completed child, or output - * accumulated from children, or block if there is absolutely nothing - * to do, on the theory that caller had nothing to do either or would - * not have called us. Once we've done something allegedly useful, we - * return, because this is not the event loop; if and when the event - * loop has nothing more important to do, we'll be called again. - * - * So this is the only place where the program blocks waiting for - * children, but we only do it when we know there's nothing else - * useful that we could be doing while we wait. - */ -static void rsync_mgr(rcynic_ctx_t *rc) -{ - rsync_status_t rsync_status; - int i, n, pid_status = -1; - rsync_ctx_t *ctx = NULL; - time_t now = time(0); - struct timeval tv; - fd_set rfds; - pid_t pid; - char *s; - - assert(rc && rc->rsync_queue); - - /* - * Check for exited subprocesses. - */ - - while ((pid = waitpid(-1, &pid_status, WNOHANG)) > 0) { - - /* - * Child exited, handle it. - */ - - logmsg(rc, log_verbose, "Subprocess %u exited with status %d", - (unsigned) pid, WEXITSTATUS(pid_status)); - - for (i = 0; (ctx = sk_rsync_ctx_t_value(rc->rsync_queue, i)) != NULL; ++i) - if (ctx->pid == pid) - break; - if (ctx == NULL) { - assert(i == sk_rsync_ctx_t_num(rc->rsync_queue)); - logmsg(rc, log_sys_err, "Couldn't find rsync context for pid %d", pid); - continue; - } - - close(ctx->fd); - ctx->fd = -1; - - if (ctx->buflen > 0) { - assert(ctx->buflen < sizeof(ctx->buffer)); - ctx->buffer[ctx->buflen] = '\0'; - do_one_rsync_log_line(rc, ctx); - ctx->buflen = 0; - } - - switch (WEXITSTATUS(pid_status)) { - - case 0: - rsync_status = rsync_status_done; - break; - - case 5: /* "Error starting client-server protocol" */ - /* - * Handle remote rsyncd refusing to talk to us because we've - * exceeded its connection limit. Back off for a short - * interval, then retry. - */ - if (ctx->problem == rsync_problem_refused && ctx->tries < rc->max_retries) { - unsigned char r; - if (!RAND_bytes(&r, sizeof(r))) - r = 60; - ctx->deadline = time(0) + rc->retry_wait_min + r; - ctx->state = rsync_state_retry_wait; - ctx->problem = rsync_problem_none; - ctx->pid = 0; - ctx->tries++; - logmsg(rc, log_telemetry, "Scheduling retry for %s", ctx->uri.s); - continue; - } - goto failure; - - case 23: /* "Partial transfer due to error" */ - /* - * This appears to be a catch-all for "something bad happened - * trying to do what you asked me to do". In the cases I've - * seen to date, this is things like "the directory you - * requested isn't there" or "NFS exploded when I tried to touch - * the directory". These aren't network layer failures, so we - * (probably) shouldn't give up on the repository host. - */ - rsync_status = rsync_status_done; - log_validation_status(rc, &ctx->uri, rsync_partial_transfer, object_generation_null); - break; - - default: - failure: - rsync_status = rsync_status_failed; - logmsg(rc, log_data_err, "rsync %u exited with status %d fetching %s", - (unsigned) pid, WEXITSTATUS(pid_status), ctx->uri.s); - break; - } - - if (rc->rsync_timeout && now >= ctx->deadline) - rsync_status = rsync_status_timed_out; - log_validation_status(rc, &ctx->uri, - rsync_status_to_mib_counter(rsync_status), - object_generation_null); - rsync_history_add(rc, ctx, rsync_status); - rsync_call_handler(rc, ctx, rsync_status); - (void) sk_rsync_ctx_t_delete_ptr(rc->rsync_queue, ctx); - free(ctx); - ctx = NULL; - } - - if (pid == -1 && errno != EINTR && errno != ECHILD) - logmsg(rc, log_sys_err, "waitpid() returned error: %s", strerror(errno)); - - assert(rsync_count_running(rc) <= rc->max_parallel_fetches); - - /* - * Look for rsync contexts that have become runable. Odd loop - * structure is because rsync_run() might decide to remove the - * specified rsync task from the queue instead of running it. - */ - for (i = 0; (ctx = sk_rsync_ctx_t_value(rc->rsync_queue, i)) != NULL; i++) { - n = sk_rsync_ctx_t_num(rc->rsync_queue); - if (ctx->state != rsync_state_running && - rsync_runable(rc, ctx) && - rsync_count_running(rc) < rc->max_parallel_fetches) - rsync_run(rc, ctx); - if (n > sk_rsync_ctx_t_num(rc->rsync_queue)) - i--; - } - - assert(rsync_count_running(rc) <= rc->max_parallel_fetches); - - /* - * Check for log text from subprocesses. - */ - - n = rsync_construct_select(rc, now, &rfds, &tv); - - if (n > 0 && tv.tv_sec) - logmsg(rc, log_verbose, "Waiting up to %u seconds for rsync, queued %d, runable %d, running %d, max %d", - (unsigned) tv.tv_sec, sk_rsync_ctx_t_num(rc->rsync_queue), rsync_count_runable(rc), - rsync_count_running(rc), rc->max_parallel_fetches); - - if (n > 0) { -#if 0 - logmsg(rc, log_debug, "++ select(%d, %u)", n, tv.tv_sec); -#endif - n = select(n + 1, &rfds, NULL, NULL, &tv); - } - - if (n > 0) { - - for (i = 0; (ctx = sk_rsync_ctx_t_value(rc->rsync_queue, i)) != NULL; ++i) { - if (ctx->fd <= 0 || !FD_ISSET(ctx->fd, &rfds)) - continue; - - assert(ctx->buflen < sizeof(ctx->buffer) - 1); - - while ((n = read(ctx->fd, ctx->buffer + ctx->buflen, sizeof(ctx->buffer) - 1 - ctx->buflen)) > 0) { - ctx->buflen += n; - assert(ctx->buflen < sizeof(ctx->buffer)); - ctx->buffer[ctx->buflen] = '\0'; - - while ((s = strchr(ctx->buffer, '\n')) != NULL) { - *s++ = '\0'; - do_one_rsync_log_line(rc, ctx); - assert(s > ctx->buffer && s < ctx->buffer + sizeof(ctx->buffer)); - ctx->buflen -= s - ctx->buffer; - assert(ctx->buflen < sizeof(ctx->buffer)); - if (ctx->buflen > 0) - memmove(ctx->buffer, s, ctx->buflen); - ctx->buffer[ctx->buflen] = '\0'; - } - - if (ctx->buflen == sizeof(ctx->buffer) - 1) { - ctx->buffer[sizeof(ctx->buffer) - 1] = '\0'; - do_one_rsync_log_line(rc, ctx); - ctx->buflen = 0; - } - } - - if (n == 0) { - (void) close(ctx->fd); - ctx->fd = -1; - ctx->state = rsync_state_closed; - } - } - } - - assert(rsync_count_running(rc) <= rc->max_parallel_fetches); - - /* - * Deal with children that have been running too long. - */ - if (rc->rsync_timeout) { - for (i = 0; (ctx = sk_rsync_ctx_t_value(rc->rsync_queue, i)) != NULL; ++i) { - int sig; - if (ctx->pid <= 0 || now < ctx->deadline) - continue; - sig = ctx->tries++ < KILL_MAX ? SIGTERM : SIGKILL; - if (ctx->state != rsync_state_terminating) { - ctx->problem = rsync_problem_timed_out; - ctx->state = rsync_state_terminating; - ctx->tries = 0; - logmsg(rc, log_telemetry, "Subprocess %u is taking too long fetching %s, whacking it", (unsigned) ctx->pid, ctx->uri.s); - rsync_history_add(rc, ctx, rsync_status_timed_out); - } else if (sig == SIGTERM) { - logmsg(rc, log_verbose, "Whacking subprocess %u again", (unsigned) ctx->pid); - } else { - logmsg(rc, log_verbose, "Whacking subprocess %u with big hammer", (unsigned) ctx->pid); - } - (void) kill(ctx->pid, sig); - ctx->deadline = now + 1; - } - } -} - -/** - * Set up rsync context and attempt to start it. - */ -static void rsync_init(rcynic_ctx_t *rc, - const uri_t *uri, - void *cookie, - void (*handler)(rcynic_ctx_t *, const rsync_ctx_t *, const rsync_status_t, const uri_t *, void *)) -{ - rsync_ctx_t *ctx = NULL; - - assert(rc && uri && strlen(uri->s) > SIZEOF_RSYNC); - - if (!rc->run_rsync) { - logmsg(rc, log_verbose, "rsync disabled, skipping %s", uri->s); - if (handler) - handler(rc, NULL, rsync_status_skipped, uri, cookie); - return; - } - - if (rsync_history_uri(rc, uri)) { - logmsg(rc, log_verbose, "rsync cache hit for %s", uri->s); - if (handler) - handler(rc, NULL, rsync_status_done, uri, cookie); - return; - } - - if ((ctx = malloc(sizeof(*ctx))) == NULL) { - logmsg(rc, log_sys_err, "malloc(rsync_ctxt_t) failed"); - if (handler) - handler(rc, NULL, rsync_status_failed, uri, cookie); - return; - } - - memset(ctx, 0, sizeof(*ctx)); - ctx->uri = *uri; - ctx->handler = handler; - ctx->cookie = cookie; - ctx->fd = -1; - - if (!sk_rsync_ctx_t_push(rc->rsync_queue, ctx)) { - logmsg(rc, log_sys_err, "Couldn't push rsync state object onto queue, punting %s", ctx->uri.s); - rsync_call_handler(rc, ctx, rsync_status_failed); - free(ctx); - return; - } - - if (rsync_conflicts(rc, ctx)) { - logmsg(rc, log_debug, "New rsync context %s is feeling conflicted", ctx->uri.s); - ctx->state = rsync_state_conflict_wait; - } -} - -/** - * rsync a trust anchor. - */ -static void rsync_ta(rcynic_ctx_t *rc, - const uri_t *uri, - tal_ctx_t *tctx, - void (*handler)(rcynic_ctx_t *, const rsync_ctx_t *, - const rsync_status_t, const uri_t *, void *)) -{ - assert(endswith(uri->s, ".cer")); - rsync_init(rc, uri, tctx, handler); -} - -/** - * rsync an entire subtree, generally rooted at a SIA collection. - */ -static void rsync_tree(rcynic_ctx_t *rc, - const uri_t *uri, - STACK_OF(walk_ctx_t) *wsk, - void (*handler)(rcynic_ctx_t *, const rsync_ctx_t *, - const rsync_status_t, const uri_t *, void *)) -{ - assert(endswith(uri->s, "/")); - rsync_init(rc, uri, wsk, handler); -} - - - -/** - * Clean up old stuff from previous rsync runs. --delete doesn't help - * if the URI changes and we never visit the old URI again. - */ -static int prune_unauthenticated(const rcynic_ctx_t *rc, - const path_t *name, - const size_t baselen) -{ - path_t path; - struct dirent *d; - DIR *dir; - const char *slash; - - assert(rc && name && baselen > 0 && strlen(name->s) >= baselen); - - if (!is_directory(name)) { - logmsg(rc, log_usage_err, "prune: %s is not a directory", name->s); - return 0; - } - - if ((dir = opendir(name->s)) == NULL) { - logmsg(rc, log_sys_err, "prune: opendir() failed on %s: %s", name->s, strerror(errno)); - return 0; - } - - slash = endswith(name->s, "/") ? "" : "/"; - - while ((d = readdir(dir)) != NULL) { - if (!strcmp(d->d_name, ".") || !strcmp(d->d_name, "..")) - continue; - - if (snprintf(path.s, sizeof(path.s), "%s%s%s", name->s, slash, d->d_name) >= sizeof(path.s)) { - logmsg(rc, log_debug, "prune: %s%s%s too long", name->s, slash, d->d_name); - goto done; - } - - if (validation_status_find_filename(rc, path.s + baselen)) { - logmsg(rc, log_debug, "prune: cache hit %s", path.s); - continue; - } - - if (unlink(path.s) == 0) { - logmsg(rc, log_debug, "prune: removed %s", path.s); - continue; - } - - if (prune_unauthenticated(rc, &path, baselen)) - continue; - - logmsg(rc, log_sys_err, "prune: removing %s failed: %s", path.s, strerror(errno)); - goto done; - } - - if (rmdir(name->s) == 0) - logmsg(rc, log_debug, "prune: removed %s", name->s); - else if (errno != ENOTEMPTY) - logmsg(rc, log_sys_err, "prune: couldn't remove %s: %s", name->s, strerror(errno)); - - done: - closedir(dir); - return !d; -} - - - -/** - * Read a DER object using a BIO pipeline that hashes the file content - * as we read it. Returns the internal form of the parsed DER object, - * sets the hash buffer (if specified) as a side effect. The default - * hash algorithm is SHA-256. - */ -static void *read_file_with_hash(const path_t *filename, - const ASN1_ITEM *it, - const EVP_MD *md, - hashbuf_t *hash) -{ - void *result = NULL; - BIO *b; - - if ((b = BIO_new_file(filename->s, "rb")) == NULL) - goto error; - - if (hash != NULL) { - BIO *b2 = BIO_new(BIO_f_md()); - if (b2 == NULL) - goto error; - if (md == NULL) - md = EVP_sha256(); - if (!BIO_set_md(b2, md)) { - BIO_free(b2); - goto error; - } - BIO_push(b2, b); - b = b2; - } - - if ((result = ASN1_item_d2i_bio(it, b, NULL)) == NULL) - goto error; - - if (hash != NULL) { - memset(hash, 0, sizeof(*hash)); - BIO_gets(b, (char *) hash, sizeof(hash->h)); - } - - error: - BIO_free_all(b); - return result; -} - -/** - * Read and hash a certificate. - */ -static X509 *read_cert(const path_t *filename, hashbuf_t *hash) -{ - return read_file_with_hash(filename, ASN1_ITEM_rptr(X509), NULL, hash); -} - -/** - * Read and hash a CRL. - */ -static X509_CRL *read_crl(const path_t *filename, hashbuf_t *hash) -{ - return read_file_with_hash(filename, ASN1_ITEM_rptr(X509_CRL), NULL, hash); -} - -/** - * Read and hash a CMS message. - */ -static CMS_ContentInfo *read_cms(const path_t *filename, hashbuf_t *hash) -{ - return read_file_with_hash(filename, ASN1_ITEM_rptr(CMS_ContentInfo), NULL, hash); -} - - - -/** - * Extract CRLDP data from a certificate. Stops looking after finding - * the first rsync URI. - */ -static int extract_crldp_uri(rcynic_ctx_t *rc, - const uri_t *uri, - const object_generation_t generation, - const STACK_OF(DIST_POINT) *crldp, - uri_t *result) -{ - DIST_POINT *d; - int i; - - assert(rc && uri && crldp && result); - - if (sk_DIST_POINT_num(crldp) != 1) - goto bad; - - d = sk_DIST_POINT_value(crldp, 0); - - if (d->reasons || d->CRLissuer || !d->distpoint || d->distpoint->type != 0) - goto bad; - - for (i = 0; i < sk_GENERAL_NAME_num(d->distpoint->name.fullname); i++) { - GENERAL_NAME *n = sk_GENERAL_NAME_value(d->distpoint->name.fullname, i); - if (n == NULL || n->type != GEN_URI) - goto bad; - if (!is_rsync((char *) n->d.uniformResourceIdentifier->data)) - log_validation_status(rc, uri, non_rsync_uri_in_extension, generation); - else if (sizeof(result->s) <= n->d.uniformResourceIdentifier->length) - log_validation_status(rc, uri, uri_too_long, generation); - else if (result->s[0]) - log_validation_status(rc, uri, multiple_rsync_uris_in_extension, generation); - else - strcpy(result->s, (char *) n->d.uniformResourceIdentifier->data); - } - - return result->s[0]; - - bad: - log_validation_status(rc, uri, malformed_crldp_extension, generation); - return 0; -} - -/** - * Extract SIA or AIA data from a certificate. - */ -static int extract_access_uri(rcynic_ctx_t *rc, - const uri_t *uri, - const object_generation_t generation, - const AUTHORITY_INFO_ACCESS *xia, - const int nid, - uri_t *result, - int *count) -{ - int i; - - assert(rc && uri && xia && result && count); - - for (i = 0; i < sk_ACCESS_DESCRIPTION_num(xia); i++) { - ACCESS_DESCRIPTION *a = sk_ACCESS_DESCRIPTION_value(xia, i); - if (a == NULL || a->location->type != GEN_URI) - return 0; - if (OBJ_obj2nid(a->method) != nid) - continue; - ++*count; - if (!is_rsync((char *) a->location->d.uniformResourceIdentifier->data)) - log_validation_status(rc, uri, non_rsync_uri_in_extension, generation); - else if (sizeof(result->s) <= a->location->d.uniformResourceIdentifier->length) - log_validation_status(rc, uri, uri_too_long, generation); - else if (result->s[0]) - log_validation_status(rc, uri, multiple_rsync_uris_in_extension, generation); - else - strcpy(result->s, (char *) a->location->d.uniformResourceIdentifier->data); - } - return 1; -} - - - -/** - * Check to see whether an AKI extension is present, is of the right - * form, and matches the issuer. - */ -static int check_aki(rcynic_ctx_t *rc, - const uri_t *uri, - const X509 *issuer, - const AUTHORITY_KEYID *aki, - const object_generation_t generation) -{ - assert(rc && uri && issuer && issuer->skid); - - if (aki == NULL) { - log_validation_status(rc, uri, aki_extension_missing, generation); - return 0; - } - - if (!aki->keyid || aki->serial || aki->issuer) { - log_validation_status(rc, uri, aki_extension_wrong_format, generation); - return 0; - } - - if (ASN1_OCTET_STRING_cmp(aki->keyid, issuer->skid)) { - log_validation_status(rc, uri, aki_extension_issuer_mismatch, generation); - return 0; - } - - return 1; -} - - - -/** - * Check whether a Distinguished Name conforms to the rescert profile. - * The profile is very restrictive: it only allows one mandatory - * CommonName field and one optional SerialNumber field, both of which - * must be of type PrintableString. - */ -static int check_allowed_dn(X509_NAME *dn) -{ - X509_NAME_ENTRY *ne; - ASN1_STRING *s; - int loc; - - if (dn == NULL) - return 0; - - switch (X509_NAME_entry_count(dn)) { - - case 2: - if ((loc = X509_NAME_get_index_by_NID(dn, NID_serialNumber, -1)) < 0 || - (ne = X509_NAME_get_entry(dn, loc)) == NULL || - (s = X509_NAME_ENTRY_get_data(ne)) == NULL || - ASN1_STRING_type(s) != V_ASN1_PRINTABLESTRING) - return 0; - - /* Fall through */ - - case 1: - if ((loc = X509_NAME_get_index_by_NID(dn, NID_commonName, -1)) < 0 || - (ne = X509_NAME_get_entry(dn, loc)) == NULL || - (s = X509_NAME_ENTRY_get_data(ne)) == NULL || - ASN1_STRING_type(s) != V_ASN1_PRINTABLESTRING) - return 0; - - return 1; - - default: - return 0; - } -} - -/** - * Check whether an ASN.1 TIME value conforms to RFC 5280 4.1.2.5. - */ -static int check_allowed_time_encoding(ASN1_TIME *t) -{ - switch (t->type) { - - case V_ASN1_UTCTIME: - return t->length == sizeof("yymmddHHMMSSZ") - 1; - - case V_ASN1_GENERALIZEDTIME: - return (t->length == sizeof("yyyymmddHHMMSSZ") - 1 && - strcmp("205", (char *) t->data) <= 0); - - } - return 0; -} - -/** - * Compare ASN1_TIME values. - */ -static int asn1_time_cmp(ASN1_TIME *t1, ASN1_TIME *t2) -{ - ASN1_GENERALIZEDTIME *g1 = ASN1_TIME_to_generalizedtime(t1, NULL); - ASN1_GENERALIZEDTIME *g2 = ASN1_TIME_to_generalizedtime(t2, NULL); - - int cmp = ASN1_STRING_cmp(g1, g2); - - ASN1_GENERALIZEDTIME_free(g1); - ASN1_GENERALIZEDTIME_free(g2); - - return cmp; -} - - - -/** - * Attempt to read and check one CRL from disk. - */ - -static X509_CRL *check_crl_1(rcynic_ctx_t *rc, - const uri_t *uri, - path_t *path, - const path_t *prefix, - X509 *issuer, - const object_generation_t generation) -{ - STACK_OF(X509_REVOKED) *revoked; - X509_CRL *crl = NULL; - EVP_PKEY *pkey; - int i, ret; - - assert(uri && path && issuer); - - if (!uri_to_filename(rc, uri, path, prefix) || - (crl = read_crl(path, NULL)) == NULL) - goto punt; - - if (X509_CRL_get_version(crl) != 1) { - log_validation_status(rc, uri, wrong_object_version, generation); - goto punt; - } - - if (!crl->crl || !crl->crl->sig_alg || !crl->crl->sig_alg->algorithm || - OBJ_obj2nid(crl->crl->sig_alg->algorithm) != NID_sha256WithRSAEncryption) { - log_validation_status(rc, uri, nonconformant_signature_algorithm, generation); - goto punt; - } - - if (!check_allowed_time_encoding(X509_CRL_get_lastUpdate(crl)) || - !check_allowed_time_encoding(X509_CRL_get_nextUpdate(crl))) { - log_validation_status(rc, uri, nonconformant_asn1_time_value, generation); - goto punt; - } - - if (X509_cmp_current_time(X509_CRL_get_lastUpdate(crl)) > 0) { - log_validation_status(rc, uri, crl_not_yet_valid, generation); - goto punt; - } - - if (X509_cmp_current_time(X509_CRL_get_nextUpdate(crl)) < 0) { - log_validation_status(rc, uri, stale_crl_or_manifest, generation); - if (!rc->allow_stale_crl) - goto punt; - } - - if (!check_aki(rc, uri, issuer, crl->akid, generation)) - goto punt; - - if (crl->crl_number == NULL) { - log_validation_status(rc, uri, crl_number_extension_missing, generation); - goto punt; - } - - if (ASN1_INTEGER_cmp(crl->crl_number, asn1_zero) < 0) { - log_validation_status(rc, uri, crl_number_is_negative, generation); - goto punt; - } - - if (ASN1_INTEGER_cmp(crl->crl_number, asn1_twenty_octets) > 0) { - log_validation_status(rc, uri, crl_number_out_of_range, generation); - goto punt; - } - - if (X509_CRL_get_ext_count(crl) != 2) { - log_validation_status(rc, uri, disallowed_x509v3_extension, generation); - goto punt; - } - - if (X509_NAME_cmp(X509_CRL_get_issuer(crl), X509_get_subject_name(issuer))) { - log_validation_status(rc, uri, crl_issuer_name_mismatch, generation); - goto punt; - } - - if (!check_allowed_dn(X509_CRL_get_issuer(crl))) { - log_validation_status(rc, uri, nonconformant_issuer_name, generation); - if (!rc->allow_nonconformant_name) - goto punt; - } - - if ((revoked = X509_CRL_get_REVOKED(crl)) != NULL) { - for (i = sk_X509_REVOKED_num(revoked) - 1; i >= 0; --i) { - if (X509_REVOKED_get_ext_count(sk_X509_REVOKED_value(revoked, i)) > 0) { - log_validation_status(rc, uri, disallowed_x509v3_extension, generation); - goto punt; - } - } - } - - if ((pkey = X509_get_pubkey(issuer)) == NULL) - goto punt; - ret = X509_CRL_verify(crl, pkey); - EVP_PKEY_free(pkey); - - if (ret > 0) - return crl; - - punt: - X509_CRL_free(crl); - return NULL; -} - -/** - * Check whether we already have a particular CRL, attempt to fetch it - * and check issuer's signature if we don't. - * - * General plan here is to do basic checks on both current and backup - * generation CRLs, then, if both generations pass all of our other - * tests, pick the generation with the highest CRL number, to protect - * against replay attacks. - */ -static X509_CRL *check_crl(rcynic_ctx_t *rc, - const uri_t *uri, - X509 *issuer) -{ - X509_CRL *old_crl, *new_crl, *result = NULL; - path_t old_path, new_path; - - if (uri_to_filename(rc, uri, &new_path, &rc->new_authenticated) && - (new_crl = read_crl(&new_path, NULL)) != NULL) - return new_crl; - - logmsg(rc, log_telemetry, "Checking CRL %s", uri->s); - - new_crl = check_crl_1(rc, uri, &new_path, &rc->unauthenticated, - issuer, object_generation_current); - - old_crl = check_crl_1(rc, uri, &old_path, &rc->old_authenticated, - issuer, object_generation_backup); - - if (!new_crl) - result = old_crl; - - else if (!old_crl) - result = new_crl; - - else { - ASN1_GENERALIZEDTIME *g_old = ASN1_TIME_to_generalizedtime(X509_CRL_get_lastUpdate(old_crl), NULL); - ASN1_GENERALIZEDTIME *g_new = ASN1_TIME_to_generalizedtime(X509_CRL_get_lastUpdate(new_crl), NULL); - int num_cmp = ASN1_INTEGER_cmp(old_crl->crl_number, new_crl->crl_number); - int date_cmp = (!g_old || !g_new) ? 0 : ASN1_STRING_cmp(g_old, g_new); - - if (!g_old) - log_validation_status(rc, uri, bad_thisupdate, object_generation_backup); - if (!g_new) - log_validation_status(rc, uri, bad_thisupdate, object_generation_current); - if (num_cmp > 0) - log_validation_status(rc, uri, backup_number_higher_than_current, object_generation_current); - if (g_old && g_new && date_cmp > 0) - log_validation_status(rc, uri, backup_thisupdate_newer_than_current, object_generation_current); - - if (num_cmp > 0 && (!g_old || !g_new || date_cmp > 0)) - result = old_crl; - else - result = new_crl; - - ASN1_GENERALIZEDTIME_free(g_old); - ASN1_GENERALIZEDTIME_free(g_new); - } - - if (result && result == new_crl) - install_object(rc, uri, &new_path, object_generation_current); - else if (!access(new_path.s, F_OK)) - log_validation_status(rc, uri, object_rejected, object_generation_current); - - if (result && result == old_crl) - install_object(rc, uri, &old_path, object_generation_backup); - else if (!result && !access(old_path.s, F_OK)) - log_validation_status(rc, uri, object_rejected, object_generation_backup); - - if (result != new_crl) - X509_CRL_free(new_crl); - - if (result != old_crl) - X509_CRL_free(old_crl); - - return result; -} - - -/** - * Check digest of a CRL we've already accepted. - */ -static int check_crl_digest(const rcynic_ctx_t *rc, - const uri_t *uri, - const unsigned char *hash, - const size_t hashlen) -{ - X509_CRL *crl = NULL; - hashbuf_t hashbuf; - path_t path; - int result; - - assert(rc && uri && hash); - - if (!uri_to_filename(rc, uri, &path, &rc->new_authenticated) || - (crl = read_crl(&path, &hashbuf)) == NULL) - return 0; - - result = hashlen <= sizeof(hashbuf.h) && !memcmp(hashbuf.h, hash, hashlen); - - X509_CRL_free(crl); - - return result; -} - - - -/** - * Validation callback function for use with x509_verify_cert(). - */ -static int check_x509_cb(int ok, X509_STORE_CTX *ctx) -{ - rcynic_x509_store_ctx_t *rctx = (rcynic_x509_store_ctx_t *) ctx; - mib_counter_t code; - - assert(rctx != NULL); - - switch (ctx->error) { - case X509_V_OK: - return ok; - - case X509_V_ERR_SUBJECT_ISSUER_MISMATCH: - /* - * Informational events, not really errors. ctx->check_issued() - * is called in many places where failure to find an issuer is not - * a failure for the calling function. Just leave these alone. - */ - return ok; - - case X509_V_ERR_CRL_HAS_EXPIRED: - /* - * This isn't really an error, exactly. CRLs don't really - * "expire". What OpenSSL really means by this error is just - * "it's now later than the issuer said it intended to publish a - * new CRL". Whether we treat this as an error or not is - * configurable, see the allow_stale_crl parameter. - * - * Deciding whether to allow stale CRLs is check_crl_1()'s job, - * not ours. By the time this callback occurs, we've already - * accepted the CRL; this callback is just notifying us that the - * object being checked is tainted by a stale CRL. So we mark the - * object as tainted and carry on. - */ - log_validation_status(rctx->rc, &rctx->subject->uri, tainted_by_stale_crl, rctx->subject->generation); - ok = 1; - return ok; - - case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT: - /* - * This is another error that's only an error in the strange world - * of OpenSSL, but a more serious one. By default, OpenSSL - * expects all trust anchors to be self-signed. This is not a - * PKIX requirement, it's just an OpenSSL thing, but one violates - * it at one's peril, because the only way to convince OpenSSL to - * allow a non-self-signed trust anchor is to intercept this - * "error" in the verify callback handler. - * - * So this program supports non-self-signed trust anchors, but be - * warned that enabling this feature may cause this program's - * output not to work with other OpenSSL-based applications. - */ - if (rctx->rc->allow_non_self_signed_trust_anchor) - ok = 1; - log_validation_status(rctx->rc, &rctx->subject->uri, trust_anchor_not_self_signed, rctx->subject->generation); - return ok; - - /* - * Select correct MIB counter for every known OpenSSL verify errors - * except the ones we handle explicitly above, then fall through to - * common handling for all of these. - */ -#define QV(x) \ - case x: \ - code = mib_openssl_##x; \ - break; - MIB_COUNTERS_FROM_OPENSSL; -#undef QV - - default: - code = unknown_openssl_verify_error; - break; - } - - log_validation_status(rctx->rc, &rctx->subject->uri, code, rctx->subject->generation); - return ok; -} - -/** - * Check crypto aspects of a certificate, policy OID, RFC 3779 path - * validation, and conformance to the RPKI certificate profile. - */ -static int check_x509(rcynic_ctx_t *rc, - STACK_OF(walk_ctx_t) *wsk, - const uri_t *uri, - X509 *x, - certinfo_t *certinfo, - const object_generation_t generation) -{ - walk_ctx_t *w = walk_ctx_stack_head(wsk); - rcynic_x509_store_ctx_t rctx; - EVP_PKEY *issuer_pkey = NULL, *subject_pkey = NULL; - unsigned long flags = (X509_V_FLAG_POLICY_CHECK | X509_V_FLAG_EXPLICIT_POLICY | X509_V_FLAG_X509_STRICT); - AUTHORITY_INFO_ACCESS *sia = NULL, *aia = NULL; - STACK_OF(POLICYINFO) *policies = NULL; - ASN1_BIT_STRING *ski_pubkey = NULL; - STACK_OF(DIST_POINT) *crldp = NULL; - EXTENDED_KEY_USAGE *eku = NULL; - BASIC_CONSTRAINTS *bc = NULL; - hashbuf_t ski_hashbuf; - unsigned ski_hashlen, afi; - int i, ok, crit, loc, ex_count, routercert = 0, ret = 0; - - assert(rc && wsk && w && uri && x && w->cert); - - /* - * Cleanup logic will explode if rctx.ctx hasn't been initialized, - * so we need to do this before running any test that can fail. - */ - if (!X509_STORE_CTX_init(&rctx.ctx, rc->x509_store, x, NULL)) - return 0; - - /* - * certinfo == NULL means x is a self-signed trust anchor. - */ - if (certinfo == NULL) - certinfo = &w->certinfo; - - memset(certinfo, 0, sizeof(*certinfo)); - - certinfo->uri = *uri; - certinfo->generation = generation; - - if (ASN1_INTEGER_cmp(X509_get_serialNumber(x), asn1_zero) <= 0 || - ASN1_INTEGER_cmp(X509_get_serialNumber(x), asn1_twenty_octets) > 0) { - log_validation_status(rc, uri, bad_certificate_serial_number, generation); - goto done; - } - - if (!check_allowed_time_encoding(X509_get_notBefore(x)) || - !check_allowed_time_encoding(X509_get_notAfter(x))) { - log_validation_status(rc, uri, nonconformant_asn1_time_value, generation); - goto done; - } - - /* - * Apparently nothing ever looks at these fields, so there are no - * API functions for them. We wouldn't bother either if they - * weren't forbidden by the RPKI certificate profile. - */ - if (!x->cert_info || x->cert_info->issuerUID || x->cert_info->subjectUID) { - log_validation_status(rc, uri, nonconformant_certificate_uid, generation); - goto done; - } - - /* - * Keep track of allowed extensions we've seen. Once we've - * processed all the ones we expect, anything left is an error. - */ - ex_count = X509_get_ext_count(x); - - /* - * We don't use X509_check_ca() to set certinfo->ca anymore, because - * it's not paranoid enough to enforce the RPKI certificate profile, - * but we still call it because we need it (or something) to invoke - * x509v3_cache_extensions() for us. - */ - (void) X509_check_ca(x); - - if ((bc = X509_get_ext_d2i(x, NID_basic_constraints, &crit, NULL)) != NULL) { - ex_count--; - if (!crit || bc->ca <= 0 || bc->pathlen != NULL) { - log_validation_status(rc, uri, malformed_basic_constraints, generation); - goto done; - } - } - - certinfo->ca = bc != NULL; - - if (certinfo == &w->certinfo) { - certinfo->ta = 1; - if (!certinfo->ca) { - log_validation_status(rc, uri, malformed_trust_anchor, generation); - goto done; - } - } - - if ((aia = X509_get_ext_d2i(x, NID_info_access, NULL, NULL)) != NULL) { - int n_caIssuers = 0; - ex_count--; - if (!extract_access_uri(rc, uri, generation, aia, NID_ad_ca_issuers, - &certinfo->aia, &n_caIssuers) || - !certinfo->aia.s[0] || - sk_ACCESS_DESCRIPTION_num(aia) != n_caIssuers) { - log_validation_status(rc, uri, malformed_aia_extension, generation); - goto done; - } - } - - if (certinfo->ta && aia) { - log_validation_status(rc, uri, aia_extension_forbidden, generation); - goto done; - } - - if (!certinfo->ta && !aia) { - log_validation_status(rc, uri, aia_extension_missing, generation); - goto done; - } - - if ((eku = X509_get_ext_d2i(x, NID_ext_key_usage, &crit, NULL)) != NULL) { - ex_count--; - if (crit || certinfo->ca || !endswith(uri->s, ".cer") || sk_ASN1_OBJECT_num(eku) == 0) { - log_validation_status(rc, uri, inappropriate_eku_extension, generation); - goto done; - } - for (i = 0; i < sk_ASN1_OBJECT_num(eku); i++) - routercert |= OBJ_obj2nid(sk_ASN1_OBJECT_value(eku, i)) == NID_id_kp_bgpsec_router; - } - - if ((sia = X509_get_ext_d2i(x, NID_sinfo_access, NULL, NULL)) != NULL) { - int got_caDirectory, got_rpkiManifest, got_signedObject; - int n_caDirectory = 0, n_rpkiManifest = 0, n_signedObject = 0; - ex_count--; - ok = (extract_access_uri(rc, uri, generation, sia, NID_caRepository, - &certinfo->sia, &n_caDirectory) && - extract_access_uri(rc, uri, generation, sia, NID_ad_rpkiManifest, - &certinfo->manifest, &n_rpkiManifest) && - extract_access_uri(rc, uri, generation, sia, NID_ad_signedObject, - &certinfo->signedobject, &n_signedObject)); - got_caDirectory = certinfo->sia.s[0] != '\0'; - got_rpkiManifest = certinfo->manifest.s[0] != '\0'; - got_signedObject = certinfo->signedobject.s[0] != '\0'; - ok &= sk_ACCESS_DESCRIPTION_num(sia) == n_caDirectory + n_rpkiManifest + n_signedObject; - if (certinfo->ca) - ok &= got_caDirectory && got_rpkiManifest && !got_signedObject; - else if (rc->allow_ee_without_signedObject) - ok &= !got_caDirectory && !got_rpkiManifest; - else - ok &= !got_caDirectory && !got_rpkiManifest && got_signedObject; - if (!ok) { - log_validation_status(rc, uri, malformed_sia_extension, generation); - goto done; - } - } else if (certinfo->ca || !rc->allow_ee_without_signedObject) { - log_validation_status(rc, uri, sia_extension_missing, generation); - goto done; - } else if (!routercert) { - log_validation_status(rc, uri, sia_extension_missing_from_ee, generation); - } - - if (certinfo->signedobject.s[0] && strcmp(uri->s, certinfo->signedobject.s)) - log_validation_status(rc, uri, bad_signed_object_uri, generation); - - if ((crldp = X509_get_ext_d2i(x, NID_crl_distribution_points, NULL, NULL)) != NULL) { - ex_count--; - if (!extract_crldp_uri(rc, uri, generation, crldp, &certinfo->crldp)) - goto done; - } - - rctx.rc = rc; - rctx.subject = certinfo; - - if (w->certs == NULL && (w->certs = walk_ctx_stack_certs(rc, wsk)) == NULL) - goto done; - - if (X509_get_version(x) != 2) { - log_validation_status(rc, uri, wrong_object_version, generation); - goto done; - } - - if (!x->cert_info || !x->cert_info->signature || !x->cert_info->signature->algorithm || - OBJ_obj2nid(x->cert_info->signature->algorithm) != NID_sha256WithRSAEncryption) { - log_validation_status(rc, uri, nonconformant_signature_algorithm, generation); - goto done; - } - - if (certinfo->sia.s[0] && certinfo->sia.s[strlen(certinfo->sia.s) - 1] != '/') { - log_validation_status(rc, uri, malformed_cadirectory_uri, generation); - goto done; - } - - if (!w->certinfo.ta && strcmp(w->certinfo.uri.s, certinfo->aia.s)) - log_validation_status(rc, uri, aia_doesnt_match_issuer, generation); - - if (certinfo->ca && !certinfo->sia.s[0]) { - log_validation_status(rc, uri, sia_cadirectory_uri_missing, generation); - goto done; - } - - if (certinfo->ca && !certinfo->manifest.s[0]) { - log_validation_status(rc, uri, sia_manifest_uri_missing, generation); - goto done; - } - - if (certinfo->ca && !startswith(certinfo->manifest.s, certinfo->sia.s)) { - log_validation_status(rc, uri, manifest_carepository_mismatch, generation); - goto done; - } - - if (x->skid) { - ex_count--; - } else { - log_validation_status(rc, uri, ski_extension_missing, generation); - goto done; - } - - if (!check_allowed_dn(X509_get_subject_name(x))) { - log_validation_status(rc, uri, nonconformant_subject_name, generation); - if (!rc->allow_nonconformant_name) - goto done; - } - - if (!check_allowed_dn(X509_get_issuer_name(x))) { - log_validation_status(rc, uri, nonconformant_issuer_name, generation); - if (!rc->allow_nonconformant_name) - goto done; - } - - if ((policies = X509_get_ext_d2i(x, NID_certificate_policies, &crit, NULL)) != NULL) { - POLICYQUALINFO *qualifier = NULL; - POLICYINFO *policy = NULL; - ex_count--; - if (!crit || sk_POLICYINFO_num(policies) != 1 || - (policy = sk_POLICYINFO_value(policies, 0)) == NULL || - OBJ_obj2nid(policy->policyid) != NID_cp_ipAddr_asNumber || - sk_POLICYQUALINFO_num(policy->qualifiers) > 1 || - (sk_POLICYQUALINFO_num(policy->qualifiers) == 1 && - ((qualifier = sk_POLICYQUALINFO_value(policy->qualifiers, 0)) == NULL || - OBJ_obj2nid(qualifier->pqualid) != NID_id_qt_cps))) { - log_validation_status(rc, uri, bad_certificate_policy, generation); - goto done; - } - if (qualifier) - log_validation_status(rc, uri, policy_qualifier_cps, generation); - } - - if (!X509_EXTENSION_get_critical(X509_get_ext(x, X509_get_ext_by_NID(x, NID_key_usage, -1))) || - (x->ex_flags & EXFLAG_KUSAGE) == 0 || - x->ex_kusage != (certinfo->ca ? KU_KEY_CERT_SIGN | KU_CRL_SIGN : KU_DIGITAL_SIGNATURE)) { - log_validation_status(rc, uri, bad_key_usage, generation); - goto done; - } - ex_count--; - - if (x->rfc3779_addr) { - ex_count--; - if (routercert || - (loc = X509_get_ext_by_NID(x, NID_sbgp_ipAddrBlock, -1)) < 0 || - !X509_EXTENSION_get_critical(X509_get_ext(x, loc)) || - !v3_addr_is_canonical(x->rfc3779_addr) || - sk_IPAddressFamily_num(x->rfc3779_addr) == 0) { - log_validation_status(rc, uri, bad_ipaddrblocks, generation); - goto done; - } - for (i = 0; i < sk_IPAddressFamily_num(x->rfc3779_addr); i++) { - IPAddressFamily *f = sk_IPAddressFamily_value(x->rfc3779_addr, i); - afi = v3_addr_get_afi(f); - if (afi != IANA_AFI_IPV4 && afi != IANA_AFI_IPV6) { - log_validation_status(rc, uri, unknown_afi, generation); - goto done; - } - if (f->addressFamily->length != 2) { - log_validation_status(rc, uri, safi_not_allowed, generation); - goto done; - } - } - } - - if (x->rfc3779_asid) { - ex_count--; - if ((loc = X509_get_ext_by_NID(x, NID_sbgp_autonomousSysNum, -1)) < 0 || - !X509_EXTENSION_get_critical(X509_get_ext(x, loc)) || - !v3_asid_is_canonical(x->rfc3779_asid) || - x->rfc3779_asid->asnum == NULL || - x->rfc3779_asid->rdi != NULL || - (routercert && x->rfc3779_asid->asnum->type == ASIdentifierChoice_inherit)) { - log_validation_status(rc, uri, bad_asidentifiers, generation); - goto done; - } - } - - if (!x->rfc3779_addr && !x->rfc3779_asid) { - log_validation_status(rc, uri, missing_resources, generation); - goto done; - } - - subject_pkey = X509_get_pubkey(x); - ok = subject_pkey != NULL; - if (ok) { - ASN1_OBJECT *algorithm; - - (void) X509_PUBKEY_get0_param(&algorithm, NULL, NULL, NULL, X509_get_X509_PUBKEY(x)); - - switch (OBJ_obj2nid(algorithm)) { - - case NID_rsaEncryption: - ok = (EVP_PKEY_type(subject_pkey->type) == EVP_PKEY_RSA && - BN_get_word(subject_pkey->pkey.rsa->e) == 65537); - if (!ok) - break; - if (!certinfo->ca && rc->allow_1024_bit_ee_key && - BN_num_bits(subject_pkey->pkey.rsa->n) == 1024) - log_validation_status(rc, uri, ee_certificate_with_1024_bit_key, generation); - else - ok = BN_num_bits(subject_pkey->pkey.rsa->n) == 2048; - break; - - case NID_X9_62_id_ecPublicKey: - ok = !certinfo->ca && routercert; - break; - - default: - ok = 0; - } - } - if (!ok) { - log_validation_status(rc, uri, bad_public_key, generation); - goto done; - } - - if (x->skid == NULL || - (ski_pubkey = X509_get0_pubkey_bitstr(x)) == NULL || - !EVP_Digest(ski_pubkey->data, ski_pubkey->length, - ski_hashbuf.h, &ski_hashlen, EVP_sha1(), NULL) || - ski_hashlen != 20 || - ski_hashlen != x->skid->length || - memcmp(ski_hashbuf.h, x->skid->data, ski_hashlen)) { - log_validation_status(rc, uri, ski_public_key_mismatch, generation); - goto done; - } - - if (x->akid) { - ex_count--; - if (!check_aki(rc, uri, w->cert, x->akid, generation)) - goto done; - } - - if (!x->akid && !certinfo->ta) { - log_validation_status(rc, uri, aki_extension_missing, generation); - goto done; - } - - if ((issuer_pkey = X509_get_pubkey(w->cert)) == NULL || X509_verify(x, issuer_pkey) <= 0) { - log_validation_status(rc, uri, certificate_bad_signature, generation); - goto done; - } - - if (certinfo->ta) { - - if (certinfo->crldp.s[0]) { - log_validation_status(rc, uri, trust_anchor_with_crldp, generation); - goto done; - } - - } else { - - if (!certinfo->crldp.s[0]) { - log_validation_status(rc, uri, crldp_uri_missing, generation); - goto done; - } - - if (!certinfo->ca && !startswith(certinfo->crldp.s, w->certinfo.sia.s)) { - log_validation_status(rc, uri, crldp_doesnt_match_issuer_sia, generation); - goto done; - } - - if (w->crls == NULL && ((w->crls = sk_X509_CRL_new_null()) == NULL || - !sk_X509_CRL_push(w->crls, NULL))) { - logmsg(rc, log_sys_err, "Internal allocation error setting up CRL for validation"); - goto done; - } - - assert(sk_X509_CRL_num(w->crls) == 1); - assert((w->crldp.s[0] == '\0') == (sk_X509_CRL_value(w->crls, 0) == NULL)); - - if (strcmp(w->crldp.s, certinfo->crldp.s)) { - X509_CRL *old_crl = sk_X509_CRL_value(w->crls, 0); - X509_CRL *new_crl = check_crl(rc, &certinfo->crldp, w->cert); - - if (w->crldp.s[0]) - log_validation_status(rc, uri, issuer_uses_multiple_crldp_values, generation); - - if (new_crl == NULL) { - log_validation_status(rc, uri, bad_crl, generation); - goto done; - } - - if (old_crl && new_crl && ASN1_INTEGER_cmp(old_crl->crl_number, new_crl->crl_number) < 0) { - log_validation_status(rc, uri, crldp_names_newer_crl, generation); - X509_CRL_free(old_crl); - old_crl = NULL; - } - - if (old_crl == NULL) { - sk_X509_CRL_set(w->crls, 0, new_crl); - w->crldp = certinfo->crldp; - } else { - X509_CRL_free(new_crl); - } - } - - assert(sk_X509_CRL_value(w->crls, 0)); - flags |= X509_V_FLAG_CRL_CHECK; - X509_STORE_CTX_set0_crls(&rctx.ctx, w->crls); - } - - if (ex_count > 0) { - log_validation_status(rc, uri, disallowed_x509v3_extension, generation); - goto done; - } - - assert(w->certs != NULL); - X509_STORE_CTX_trusted_stack(&rctx.ctx, w->certs); - X509_STORE_CTX_set_verify_cb(&rctx.ctx, check_x509_cb); - - X509_VERIFY_PARAM_set_flags(rctx.ctx.param, flags); - - X509_VERIFY_PARAM_add0_policy(rctx.ctx.param, OBJ_nid2obj(NID_cp_ipAddr_asNumber)); - - if (X509_verify_cert(&rctx.ctx) <= 0) { - log_validation_status(rc, uri, certificate_failed_validation, generation); - goto done; - } - - ret = 1; - - done: - X509_STORE_CTX_cleanup(&rctx.ctx); - EVP_PKEY_free(issuer_pkey); - EVP_PKEY_free(subject_pkey); - BASIC_CONSTRAINTS_free(bc); - sk_ACCESS_DESCRIPTION_pop_free(sia, ACCESS_DESCRIPTION_free); - sk_ACCESS_DESCRIPTION_pop_free(aia, ACCESS_DESCRIPTION_free); - sk_DIST_POINT_pop_free(crldp, DIST_POINT_free); - sk_POLICYINFO_pop_free(policies, POLICYINFO_free); - sk_ASN1_OBJECT_pop_free(eku, ASN1_OBJECT_free); - - return ret; -} - -/** - * Extract one datum from a CMS_SignerInfo. - */ -static void *extract_si_datum(CMS_SignerInfo *si, - int *n, - const int optional, - const int nid, - const int asn1_type) -{ - int i = CMS_signed_get_attr_by_NID(si, nid, -1); - void *result = NULL; - X509_ATTRIBUTE *a; - - assert(si && n); - - if (i < 0 && optional) - return NULL; - - if (i >= 0 && - CMS_signed_get_attr_by_NID(si, nid, i) < 0 && - (a = CMS_signed_get_attr(si, i)) != NULL && - X509_ATTRIBUTE_count(a) == 1 && - (result = X509_ATTRIBUTE_get0_data(a, 0, asn1_type, NULL)) != NULL) - --*n; - else - *n = -1; - - return result; -} - -/** - * Check a signed CMS object. - */ -static int check_cms(rcynic_ctx_t *rc, - STACK_OF(walk_ctx_t) *wsk, - const uri_t *uri, - path_t *path, - const path_t *prefix, - CMS_ContentInfo **pcms, - X509 **px, - certinfo_t *certinfo, - BIO *bio, - const unsigned char *hash, - const size_t hashlen, - const int expected_eContentType_nid, - const int require_inheritance, - const object_generation_t generation) -{ - STACK_OF(CMS_SignerInfo) *signer_infos = NULL; - CMS_ContentInfo *cms = NULL; - CMS_SignerInfo *si = NULL; - ASN1_OCTET_STRING *sid = NULL; - X509_NAME *si_issuer = NULL; - ASN1_INTEGER *si_serial = NULL; - STACK_OF(X509_CRL) *crls = NULL; - STACK_OF(X509) *certs = NULL; - X509_ALGOR *signature_alg = NULL, *digest_alg = NULL; - ASN1_OBJECT *oid = NULL; - hashbuf_t hashbuf; - X509 *x = NULL; - certinfo_t certinfo_; - int i, result = 0; - - assert(rc && wsk && uri && path && prefix); - - if (!certinfo) - certinfo = &certinfo_; - - if (!uri_to_filename(rc, uri, path, prefix)) - goto error; - - if (hash) - cms = read_cms(path, &hashbuf); - else - cms = read_cms(path, NULL); - - if (!cms) - goto error; - - if (hash && (hashlen > sizeof(hashbuf.h) || - memcmp(hashbuf.h, hash, hashlen))) { - log_validation_status(rc, uri, digest_mismatch, generation); - if (!rc->allow_digest_mismatch) - goto error; - } - - if (OBJ_obj2nid(CMS_get0_eContentType(cms)) != expected_eContentType_nid) { - log_validation_status(rc, uri, bad_cms_econtenttype, generation); - goto error; - } - - if (CMS_verify(cms, NULL, NULL, NULL, bio, CMS_NO_SIGNER_CERT_VERIFY) <= 0) { - log_validation_status(rc, uri, cms_validation_failure, generation); - goto error; - } - - if ((crls = CMS_get1_crls(cms)) != NULL) { - log_validation_status(rc, uri, cms_includes_crls, generation); - goto error; - } - - if ((signer_infos = CMS_get0_SignerInfos(cms)) == NULL || - sk_CMS_SignerInfo_num(signer_infos) != 1 || - (si = sk_CMS_SignerInfo_value(signer_infos, 0)) == NULL || - !CMS_SignerInfo_get0_signer_id(si, &sid, &si_issuer, &si_serial) || - sid == NULL || si_issuer != NULL || si_serial != NULL || - CMS_unsigned_get_attr_count(si) != -1) { - log_validation_status(rc, uri, bad_cms_signer_infos, generation); - goto error; - } - - CMS_SignerInfo_get0_algs(si, NULL, &x, &digest_alg, &signature_alg); - - if (x == NULL) { - log_validation_status(rc, uri, cms_signer_missing, generation); - goto error; - } - - if ((certs = CMS_get1_certs(cms)) == NULL || - sk_X509_num(certs) != 1 || - X509_cmp(x, sk_X509_value(certs, 0))) { - log_validation_status(rc, uri, bad_cms_signer, generation); - goto error; - } - - X509_ALGOR_get0(&oid, NULL, NULL, signature_alg); - i = OBJ_obj2nid(oid); - if (i != NID_sha256WithRSAEncryption && i != NID_rsaEncryption) { - log_validation_status(rc, uri, wrong_cms_si_signature_algorithm, generation); - goto error; - } - - X509_ALGOR_get0(&oid, NULL, NULL, digest_alg); - if (OBJ_obj2nid(oid) != NID_sha256) { - log_validation_status(rc, uri, wrong_cms_si_digest_algorithm, generation); - goto error; - } - - i = CMS_signed_get_attr_count(si); - - (void) extract_si_datum(si, &i, 1, NID_pkcs9_signingTime, V_ASN1_UTCTIME); - (void) extract_si_datum(si, &i, 1, NID_binary_signing_time, V_ASN1_INTEGER); - oid = extract_si_datum(si, &i, 0, NID_pkcs9_contentType, V_ASN1_OBJECT); - (void) extract_si_datum(si, &i, 0, NID_pkcs9_messageDigest, V_ASN1_OCTET_STRING); - - if (i != 0) { - log_validation_status(rc, uri, bad_cms_si_signed_attributes, generation); - if (!rc->allow_wrong_cms_si_attributes) - goto error; - } - - if (OBJ_obj2nid(oid) != expected_eContentType_nid) { - log_validation_status(rc, uri, bad_cms_si_contenttype, generation); - goto error; - } - - if (CMS_SignerInfo_cert_cmp(si, x)) { - log_validation_status(rc, uri, cms_ski_mismatch, generation); - goto error; - } - - if (!check_x509(rc, wsk, uri, x, certinfo, generation)) - goto error; - - if (require_inheritance && x->rfc3779_addr) { - for (i = 0; i < sk_IPAddressFamily_num(x->rfc3779_addr); i++) { - IPAddressFamily *f = sk_IPAddressFamily_value(x->rfc3779_addr, i); - if (f->ipAddressChoice->type != IPAddressChoice_inherit) { - log_validation_status(rc, uri, rfc3779_inheritance_required, generation); - goto error; - } - } - } - - if (require_inheritance && x->rfc3779_asid && x->rfc3779_asid->asnum && - x->rfc3779_asid->asnum->type != ASIdentifierChoice_inherit) { - log_validation_status(rc, uri, rfc3779_inheritance_required, generation); - goto error; - } - - if (pcms) { - *pcms = cms; - cms = NULL; - } - - if (px) - *px = x; - - result = 1; - - error: - CMS_ContentInfo_free(cms); - sk_X509_CRL_pop_free(crls, X509_CRL_free); - sk_X509_pop_free(certs, X509_free); - - return result; -} - - - -/** - * Load certificate, check against manifest, then run it through all - * the check_x509() tests. - */ -static X509 *check_cert_1(rcynic_ctx_t *rc, - STACK_OF(walk_ctx_t) *wsk, - const uri_t *uri, - path_t *path, - const path_t *prefix, - certinfo_t *certinfo, - const unsigned char *hash, - const size_t hashlen, - object_generation_t generation) -{ - hashbuf_t hashbuf; - X509 *x = NULL; - - assert(uri && path && wsk && certinfo); - - if (!uri_to_filename(rc, uri, path, prefix)) - return NULL; - - if (access(path->s, R_OK)) - return NULL; - - if (hash) - x = read_cert(path, &hashbuf); - else - x = read_cert(path, NULL); - - if (!x) { - logmsg(rc, log_sys_err, "Can't read certificate %s", path->s); - goto punt; - } - - if (hash && (hashlen > sizeof(hashbuf.h) || - memcmp(hashbuf.h, hash, hashlen))) { - log_validation_status(rc, uri, digest_mismatch, generation); - if (!rc->allow_digest_mismatch) - goto punt; - } - - if (check_x509(rc, wsk, uri, x, certinfo, generation)) - return x; - - punt: - X509_free(x); - return NULL; -} - -/** - * Try to find a good copy of a certificate either in fresh data or in - * backup data from a previous run of this program. - */ -static X509 *check_cert(rcynic_ctx_t *rc, - STACK_OF(walk_ctx_t) *wsk, - uri_t *uri, - certinfo_t *certinfo, - const unsigned char *hash, - const size_t hashlen) -{ - walk_ctx_t *w = walk_ctx_stack_head(wsk); - object_generation_t generation; - const path_t *prefix = NULL; - path_t path; - X509 *x; - - assert(rc && uri && wsk && w && certinfo); - - switch (w->state) { - case walk_state_current: - prefix = &rc->unauthenticated; - generation = object_generation_current; - break; - case walk_state_backup: - prefix = &rc->old_authenticated; - generation = object_generation_backup; - break; - default: - return NULL; - } - - if (skip_checking_this_object(rc, uri, generation)) - return NULL; - - if ((x = check_cert_1(rc, wsk, uri, &path, prefix, certinfo, - hash, hashlen, generation)) != NULL) - install_object(rc, uri, &path, generation); - else if (!access(path.s, F_OK)) - log_validation_status(rc, uri, object_rejected, generation); - else if (hash && generation == w->manifest_generation) - log_validation_status(rc, uri, manifest_lists_missing_object, generation); - - return x; -} - - - -/** - * Read and check one manifest from disk. - */ -static Manifest *check_manifest_1(rcynic_ctx_t *rc, - STACK_OF(walk_ctx_t) *wsk, - const uri_t *uri, - path_t *path, - const path_t *prefix, - certinfo_t *certinfo, - const object_generation_t generation) -{ - STACK_OF(FileAndHash) *sorted_fileList = NULL; - Manifest *manifest = NULL, *result = NULL; - CMS_ContentInfo *cms = NULL; - FileAndHash *fah = NULL, *fah2 = NULL; - BIO *bio = NULL; - X509 *x; - int i; - - assert(rc && wsk && uri && path && prefix); - - if ((bio = BIO_new(BIO_s_mem())) == NULL) { - logmsg(rc, log_sys_err, "Couldn't allocate BIO for manifest %s", uri->s); - goto done; - } - - if (!check_cms(rc, wsk, uri, path, prefix, &cms, &x, certinfo, bio, NULL, 0, - NID_ct_rpkiManifest, 1, generation)) - goto done; - - if ((manifest = ASN1_item_d2i_bio(ASN1_ITEM_rptr(Manifest), bio, NULL)) == NULL) { - log_validation_status(rc, uri, cms_econtent_decode_error, generation); - goto done; - } - - if (manifest->version) { - log_validation_status(rc, uri, wrong_object_version, generation); - goto done; - } - - if (X509_cmp_current_time(manifest->thisUpdate) > 0) { - log_validation_status(rc, uri, manifest_not_yet_valid, generation); - goto done; - } - - if (X509_cmp_current_time(manifest->nextUpdate) < 0) { - log_validation_status(rc, uri, stale_crl_or_manifest, generation); - if (!rc->allow_stale_manifest) - goto done; - } - - if (asn1_time_cmp(manifest->thisUpdate, X509_get_notBefore(x)) < 0 || - asn1_time_cmp(manifest->nextUpdate, X509_get_notAfter(x)) > 0) { - log_validation_status(rc, uri, manifest_interval_overruns_cert, generation); - goto done; - } - - if (ASN1_INTEGER_cmp(manifest->manifestNumber, asn1_zero) < 0 || - ASN1_INTEGER_cmp(manifest->manifestNumber, asn1_twenty_octets) > 0) { - log_validation_status(rc, uri, bad_manifest_number, generation); - goto done; - } - - if (OBJ_obj2nid(manifest->fileHashAlg) != NID_sha256) { - log_validation_status(rc, uri, nonconformant_digest_algorithm, generation); - goto done; - } - - if ((sorted_fileList = sk_FileAndHash_dup(manifest->fileList)) == NULL) { - logmsg(rc, log_sys_err, "Couldn't allocate shallow copy of fileList for manifest %s", uri->s); - goto done; - } - - (void) sk_FileAndHash_set_cmp_func(sorted_fileList, FileAndHash_name_cmp); - sk_FileAndHash_sort(sorted_fileList); - - for (i = 0; (fah = sk_FileAndHash_value(sorted_fileList, i)) != NULL && (fah2 = sk_FileAndHash_value(sorted_fileList, i + 1)) != NULL; i++) { - if (!strcmp((char *) fah->file->data, (char *) fah2->file->data)) { - log_validation_status(rc, uri, duplicate_name_in_manifest, generation); - goto done; - } - } - - for (i = 0; (fah = sk_FileAndHash_value(manifest->fileList, i)) != NULL; i++) { - if (fah->hash->length != HASH_SHA256_LEN || - (fah->hash->flags & (ASN1_STRING_FLAG_BITS_LEFT | 7)) > ASN1_STRING_FLAG_BITS_LEFT) { - log_validation_status(rc, uri, bad_manifest_digest_length, generation); - goto done; - } - } - - result = manifest; - manifest = NULL; - - done: - BIO_free(bio); - Manifest_free(manifest); - CMS_ContentInfo_free(cms); - sk_FileAndHash_free(sorted_fileList); - return result; -} - -/** - * Check whether we already have a particular manifest, attempt to fetch it - * and check issuer's signature if we don't. - * - * General plan here is to do basic checks on both current and backup - * generation manifests, then, if both generations pass all of our - * other tests, pick the generation with the highest manifest number, - * to protect against replay attacks. - * - * Once we've picked the manifest we're going to use, we need to check - * it against the CRL we've chosen. Not much we can do if they don't - * match besides whine about it, but we do need to whine in this case. - */ -static int check_manifest(rcynic_ctx_t *rc, - STACK_OF(walk_ctx_t) *wsk) -{ - walk_ctx_t *w = walk_ctx_stack_head(wsk); - Manifest *old_manifest, *new_manifest, *result = NULL; - certinfo_t old_certinfo, new_certinfo; - const uri_t *uri, *crldp = NULL; - object_generation_t generation = object_generation_null; - path_t old_path, new_path; - FileAndHash *fah = NULL; - const char *crl_tail; - int i, ok = 1; - - assert(rc && wsk && w && !w->manifest); - - uri = &w->certinfo.manifest; - - logmsg(rc, log_telemetry, "Checking manifest %s", uri->s); - - new_manifest = check_manifest_1(rc, wsk, uri, &new_path, - &rc->unauthenticated, &new_certinfo, - object_generation_current); - - old_manifest = check_manifest_1(rc, wsk, uri, &old_path, - &rc->old_authenticated, &old_certinfo, - object_generation_backup); - - if (!new_manifest) - result = old_manifest; - - else if (!old_manifest) - result = new_manifest; - - else { - int num_cmp = ASN1_INTEGER_cmp(old_manifest->manifestNumber, new_manifest->manifestNumber); - int date_cmp = ASN1_STRING_cmp(old_manifest->thisUpdate, new_manifest->thisUpdate); - - if (num_cmp > 0) - log_validation_status(rc, uri, backup_number_higher_than_current, object_generation_current); - if (date_cmp > 0) - log_validation_status(rc, uri, backup_thisupdate_newer_than_current, object_generation_current); - - if (num_cmp > 0 && date_cmp > 0) - result = old_manifest; - else - result = new_manifest; - } - - if (result && result == new_manifest) { - generation = object_generation_current; - install_object(rc, uri, &new_path, generation); - crldp = &new_certinfo.crldp; - } - - if (result && result == old_manifest) { - generation = object_generation_backup; - install_object(rc, uri, &old_path, generation); - crldp = &old_certinfo.crldp; - } - - if (result) { - crl_tail = strrchr(crldp->s, '/'); - assert(crl_tail != NULL); - crl_tail++; - - for (i = 0; (fah = sk_FileAndHash_value(result->fileList, i)) != NULL; i++) - if (!strcmp((char *) fah->file->data, crl_tail)) - break; - - if (!fah) { - log_validation_status(rc, uri, crl_not_in_manifest, generation); - if (rc->require_crl_in_manifest) - ok = 0; - } - - else if (!check_crl_digest(rc, crldp, fah->hash->data, fah->hash->length)) { - log_validation_status(rc, uri, digest_mismatch, generation); - if (!rc->allow_crl_digest_mismatch) - ok = 0; - } - } - - if ((!result || result != new_manifest) && !access(new_path.s, F_OK)) - log_validation_status(rc, uri, object_rejected, object_generation_current); - - if (!result && !access(old_path.s, F_OK)) - log_validation_status(rc, uri, object_rejected, object_generation_backup); - - if (result != new_manifest) - Manifest_free(new_manifest); - - if (result != old_manifest) - Manifest_free(old_manifest); - - w->manifest = result; - if (crldp) - w->crldp = *crldp; - w->manifest_generation = generation; - - return ok; -} - - - -/** - * Mark CRL or manifest that we're rechecking so XML report makes more sense. - */ -static void rsync_needed_mark_recheck(rcynic_ctx_t *rc, - const uri_t *uri) -{ - validation_status_t *v = NULL; - - if (uri->s[0] != '\0') - v = validation_status_find(rc->validation_status_root, - uri, object_generation_current); - - if (v) { - validation_status_set_code(v, stale_crl_or_manifest, 0); - log_validation_status(rc, uri, rechecking_object, - object_generation_current); - } -} - -/** - * Check whether we need to rsync a particular tree. This depends on - * the setting of rc->rsync_early, whether we have a valid manifest on - * file, and whether that manifest is stale yet. - */ -static int rsync_needed(rcynic_ctx_t *rc, - STACK_OF(walk_ctx_t) *wsk) -{ - walk_ctx_t *w = walk_ctx_stack_head(wsk); - int needed; - - assert(rc && wsk && w); - - needed = (rc->rsync_early || - !check_manifest(rc, wsk) || - w->manifest == NULL || - X509_cmp_current_time(w->manifest->nextUpdate) < 0); - - if (needed && w->manifest != NULL) { - rsync_needed_mark_recheck(rc, &w->certinfo.manifest); - rsync_needed_mark_recheck(rc, &w->certinfo.crldp); - Manifest_free(w->manifest); - w->manifest = NULL; - } - - return needed; -} - - - -/** - * Extract a ROA prefix from the ASN.1 bitstring encoding. - */ -static int extract_roa_prefix(const ROAIPAddress *ra, - const unsigned afi, - unsigned char *addr, - unsigned *prefixlen, - unsigned *max_prefixlen) -{ - unsigned length; - long maxlen; - - assert(ra && addr && prefixlen && max_prefixlen); - - maxlen = ASN1_INTEGER_get(ra->maxLength); - - switch (afi) { - case IANA_AFI_IPV4: length = 4; break; - case IANA_AFI_IPV6: length = 16; break; - default: return 0; - } - - if (ra->IPAddress->length < 0 || ra->IPAddress->length > length || - maxlen < 0 || maxlen > (long) length * 8) - return 0; - - if (ra->IPAddress->length > 0) { - memcpy(addr, ra->IPAddress->data, ra->IPAddress->length); - if ((ra->IPAddress->flags & 7) != 0) { - unsigned char mask = 0xFF >> (8 - (ra->IPAddress->flags & 7)); - addr[ra->IPAddress->length - 1] &= ~mask; - } - } - - memset(addr + ra->IPAddress->length, 0, length - ra->IPAddress->length); - *prefixlen = (ra->IPAddress->length * 8) - (ra->IPAddress->flags & 7); - *max_prefixlen = ra->maxLength ? (unsigned) maxlen : *prefixlen; - - return 1; -} - -/** - * Read and check one ROA from disk. - */ -static int check_roa_1(rcynic_ctx_t *rc, - STACK_OF(walk_ctx_t) *wsk, - const uri_t *uri, - path_t *path, - const path_t *prefix, - const unsigned char *hash, - const size_t hashlen, - const object_generation_t generation) -{ - STACK_OF(IPAddressFamily) *roa_resources = NULL, *ee_resources = NULL; - unsigned char addrbuf[ADDR_RAW_BUF_LEN]; - CMS_ContentInfo *cms = NULL; - BIO *bio = NULL; - ROA *roa = NULL; - X509 *x = NULL; - int i, j, result = 0; - unsigned afi, *safi = NULL, safi_, prefixlen, max_prefixlen; - ROAIPAddressFamily *rf; - ROAIPAddress *ra; - - assert(rc && wsk && uri && path && prefix); - - if ((bio = BIO_new(BIO_s_mem())) == NULL) { - logmsg(rc, log_sys_err, "Couldn't allocate BIO for ROA %s", uri->s); - goto error; - } - - if (!check_cms(rc, wsk, uri, path, prefix, &cms, &x, NULL, bio, NULL, 0, - NID_ct_ROA, 0, generation)) - goto error; - - if (!(roa = ASN1_item_d2i_bio(ASN1_ITEM_rptr(ROA), bio, NULL))) { - log_validation_status(rc, uri, cms_econtent_decode_error, generation); - goto error; - } - - if (roa->version) { - log_validation_status(rc, uri, wrong_object_version, generation); - goto error; - } - - if (ASN1_INTEGER_cmp(roa->asID, asn1_zero) < 0 || - ASN1_INTEGER_cmp(roa->asID, asn1_four_octets) > 0) { - log_validation_status(rc, uri, bad_roa_asID, generation); - goto error; - } - - ee_resources = X509_get_ext_d2i(x, NID_sbgp_ipAddrBlock, NULL, NULL); - - /* - * Extract prefixes from ROA and convert them into a resource set. - */ - - if (!(roa_resources = sk_IPAddressFamily_new_null())) - goto error; - - for (i = 0; i < sk_ROAIPAddressFamily_num(roa->ipAddrBlocks); i++) { - rf = sk_ROAIPAddressFamily_value(roa->ipAddrBlocks, i); - if (!rf || !rf->addressFamily || rf->addressFamily->length < 2 || rf->addressFamily->length > 3) { - log_validation_status(rc, uri, malformed_roa_addressfamily, generation); - goto error; - } - afi = (rf->addressFamily->data[0] << 8) | (rf->addressFamily->data[1]); - if (rf->addressFamily->length == 3) - *(safi = &safi_) = rf->addressFamily->data[2]; - for (j = 0; j < sk_ROAIPAddress_num(rf->addresses); j++) { - ra = sk_ROAIPAddress_value(rf->addresses, j); - if (!ra || - !extract_roa_prefix(ra, afi, addrbuf, &prefixlen, &max_prefixlen) || - !v3_addr_add_prefix(roa_resources, afi, safi, addrbuf, prefixlen)) { - log_validation_status(rc, uri, roa_resources_malformed, generation); - goto error; - } - if (max_prefixlen < prefixlen) { - log_validation_status(rc, uri, roa_max_prefixlen_too_short, generation); - goto error; - } - } - } - - /* - * ROAs can include nested prefixes, so direct translation to - * resource sets could include overlapping ranges, which is illegal. - * So we have to remove nested stuff before whacking into canonical - * form. Fortunately, this is relatively easy, since we know these - * are just prefixes, not ranges: in a list of prefixes sorted by - * the RFC 3779 rules, the first element of a set of nested prefixes - * will always be the least specific. - */ - - for (i = 0; i < sk_IPAddressFamily_num(roa_resources); i++) { - IPAddressFamily *f = sk_IPAddressFamily_value(roa_resources, i); - - if ((afi = v3_addr_get_afi(f)) == 0) { - log_validation_status(rc, uri, roa_contains_bad_afi_value, generation); - goto error; - } - - if (f->ipAddressChoice->type == IPAddressChoice_addressesOrRanges) { - IPAddressOrRanges *aors = f->ipAddressChoice->u.addressesOrRanges; - - sk_IPAddressOrRange_sort(aors); - - for (j = 0; j < sk_IPAddressOrRange_num(aors) - 1; j++) { - IPAddressOrRange *a = sk_IPAddressOrRange_value(aors, j); - IPAddressOrRange *b = sk_IPAddressOrRange_value(aors, j + 1); - unsigned char a_min[ADDR_RAW_BUF_LEN], a_max[ADDR_RAW_BUF_LEN]; - unsigned char b_min[ADDR_RAW_BUF_LEN], b_max[ADDR_RAW_BUF_LEN]; - int length; - - if ((length = v3_addr_get_range(a, afi, a_min, a_max, ADDR_RAW_BUF_LEN)) == 0 || - (length = v3_addr_get_range(b, afi, b_min, b_max, ADDR_RAW_BUF_LEN)) == 0) { - log_validation_status(rc, uri, roa_resources_malformed, generation); - goto error; - } - - if (memcmp(a_max, b_max, length) >= 0) { - (void) sk_IPAddressOrRange_delete(aors, j + 1); - IPAddressOrRange_free(b); - --j; - } - } - } - } - - if (!v3_addr_canonize(roa_resources)) { - log_validation_status(rc, uri, roa_resources_malformed, generation); - goto error; - } - - if (!v3_addr_subset(roa_resources, ee_resources)) { - log_validation_status(rc, uri, roa_resource_not_in_ee, generation); - goto error; - } - - result = 1; - - error: - BIO_free(bio); - ROA_free(roa); - CMS_ContentInfo_free(cms); - sk_IPAddressFamily_pop_free(roa_resources, IPAddressFamily_free); - sk_IPAddressFamily_pop_free(ee_resources, IPAddressFamily_free); - - return result; -} - -/** - * Check whether we already have a particular ROA, attempt to fetch it - * and check issuer's signature if we don't. - */ -static void check_roa(rcynic_ctx_t *rc, - STACK_OF(walk_ctx_t) *wsk, - const uri_t *uri, - const unsigned char *hash, - const size_t hashlen) -{ - walk_ctx_t *w = walk_ctx_stack_head(wsk); - path_t path; - - assert(rc && wsk && w && uri); - - if (uri_to_filename(rc, uri, &path, &rc->new_authenticated) && - !access(path.s, F_OK)) - return; - - logmsg(rc, log_telemetry, "Checking ROA %s", uri->s); - - if (check_roa_1(rc, wsk, uri, &path, &rc->unauthenticated, - hash, hashlen, object_generation_current)) { - install_object(rc, uri, &path, object_generation_current); - return; - } - - if (!access(path.s, F_OK)) - log_validation_status(rc, uri, object_rejected, object_generation_current); - else if (hash) - log_validation_status(rc, uri, manifest_lists_missing_object, object_generation_current); - - if (check_roa_1(rc, wsk, uri, &path, &rc->old_authenticated, - hash, hashlen, object_generation_backup)) { - install_object(rc, uri, &path, object_generation_backup); - return; - } - - if (!access(path.s, F_OK)) - log_validation_status(rc, uri, object_rejected, object_generation_backup); - else if (hash && w->manifest_generation == object_generation_backup) - log_validation_status(rc, uri, manifest_lists_missing_object, object_generation_backup); -} - - - -/** - * Read and check one Ghostbuster record from disk. - */ -static int check_ghostbuster_1(rcynic_ctx_t *rc, - STACK_OF(walk_ctx_t) *wsk, - const uri_t *uri, - path_t *path, - const path_t *prefix, - const unsigned char *hash, - const size_t hashlen, - const object_generation_t generation) -{ - CMS_ContentInfo *cms = NULL; - BIO *bio = NULL; - X509 *x; - int result = 0; - - assert(rc && wsk && uri && path && prefix); - -#if 0 - /* - * May want this later if we're going to inspect the VCard. For now, - * just leave this NULL and the right thing should happen. - */ - if ((bio = BIO_new(BIO_s_mem())) == NULL) { - logmsg(rc, log_sys_err, "Couldn't allocate BIO for Ghostbuster record %s", uri->s); - goto error; - } -#endif - - if (!check_cms(rc, wsk, uri, path, prefix, &cms, &x, NULL, bio, NULL, 0, - NID_ct_rpkiGhostbusters, 1, generation)) - goto error; - -#if 0 - /* - * Here is where we would read the VCard from the bio returned by - * CMS_verify() so that we could check the VCard. - */ -#endif - - result = 1; - - error: - BIO_free(bio); - CMS_ContentInfo_free(cms); - - return result; -} - -/** - * Check whether we already have a particular Ghostbuster record, - * attempt to fetch it and check issuer's signature if we don't. - */ -static void check_ghostbuster(rcynic_ctx_t *rc, - STACK_OF(walk_ctx_t) *wsk, - const uri_t *uri, - const unsigned char *hash, - const size_t hashlen) -{ - walk_ctx_t *w = walk_ctx_stack_head(wsk); - path_t path; - - assert(rc && wsk && w && uri); - - if (uri_to_filename(rc, uri, &path, &rc->new_authenticated) && - !access(path.s, F_OK)) - return; - - logmsg(rc, log_telemetry, "Checking Ghostbuster record %s", uri->s); - - if (check_ghostbuster_1(rc, wsk, uri, &path, &rc->unauthenticated, - hash, hashlen, object_generation_current)) { - install_object(rc, uri, &path, object_generation_current); - return; - } - - if (!access(path.s, F_OK)) - log_validation_status(rc, uri, object_rejected, object_generation_current); - else if (hash) - log_validation_status(rc, uri, manifest_lists_missing_object, object_generation_current); - - if (check_ghostbuster_1(rc, wsk, uri, &path, &rc->old_authenticated, - hash, hashlen, object_generation_backup)) { - install_object(rc, uri, &path, object_generation_backup); - return; - } - - if (!access(path.s, F_OK)) - log_validation_status(rc, uri, object_rejected, object_generation_backup); - else if (hash && w->manifest_generation == object_generation_backup) - log_validation_status(rc, uri, manifest_lists_missing_object, object_generation_backup); -} - - - -static void walk_cert(rcynic_ctx_t *, void *); - -/** - * rsync callback for fetching SIA tree. - */ -static void rsync_sia_callback(rcynic_ctx_t *rc, - const rsync_ctx_t *ctx, - const rsync_status_t status, - const uri_t *uri, - void *cookie) -{ - STACK_OF(walk_ctx_t) *wsk = cookie; - walk_ctx_t *w = walk_ctx_stack_head(wsk); - - assert(rc && wsk); - - if (status != rsync_status_pending) { - w->state++; - task_add(rc, walk_cert, wsk); - return; - } - - if (rsync_count_runable(rc) >= rc->max_parallel_fetches) - return; - - if ((wsk = walk_ctx_stack_clone(wsk)) == NULL) { - logmsg(rc, log_sys_err, - "walk_ctx_stack_clone() failed, probably memory exhaustion, blundering onwards without forking stack"); - return; - } - - walk_ctx_stack_pop(wsk); - task_add(rc, walk_cert, wsk); -} - -/** - * Recursive walk of certificate hierarchy (core of the program). - * - * Walk all products of the current certificate, starting with the - * ones named in the manifest and continuing with any that we find in - * the publication directory but which are not named in the manifest. - * - * Dispatch to correct checking code for the object named by URI, - * based on the filename extension in the uri. CRLs are a special - * case because we've already checked them by the time we get here, so - * we just ignore them. Other objects are either certificates or - * CMS-signed objects of one kind or another. - */ -static void walk_cert(rcynic_ctx_t *rc, void *cookie) -{ - STACK_OF(walk_ctx_t) *wsk = cookie; - const unsigned char *hash = NULL; - object_generation_t generation; - size_t hashlen; - walk_ctx_t *w; - uri_t uri; - - assert(rc && wsk); - - while ((w = walk_ctx_stack_head(wsk)) != NULL) { - - switch (w->state) { - case walk_state_current: - generation = object_generation_current; - break; - case walk_state_backup: - generation = object_generation_backup; - break; - default: - generation = object_generation_null; - break; - } - - switch (w->state) { - - case walk_state_initial: - - if (!w->certinfo.sia.s[0] || !w->certinfo.ca) { - w->state = walk_state_done; - continue; - } - - if (!w->certinfo.manifest.s[0]) { - log_validation_status(rc, &w->certinfo.uri, sia_manifest_uri_missing, w->certinfo.generation); - w->state = walk_state_done; - continue; - } - - w->state++; - continue; - - case walk_state_rsync: - - if (rsync_needed(rc, wsk)) { - rsync_tree(rc, &w->certinfo.sia, wsk, rsync_sia_callback); - return; - } - log_validation_status(rc, &w->certinfo.sia, rsync_transfer_skipped, object_generation_null); - w->state++; - continue; - - case walk_state_ready: - - walk_ctx_loop_init(rc, wsk); /* sets w->state */ - continue; - - case walk_state_current: - case walk_state_backup: - - if (!walk_ctx_loop_this(rc, wsk, &uri, &hash, &hashlen)) { - walk_ctx_loop_next(rc, wsk); - continue; - } - - if (endswith(uri.s, ".crl") || endswith(uri.s, ".mft") || endswith(uri.s, ".mnf")) { - walk_ctx_loop_next(rc, wsk); - continue; /* CRLs and manifests checked elsewhere */ - } - - if (hash == NULL && !rc->allow_object_not_in_manifest) { - log_validation_status(rc, &uri, skipped_because_not_in_manifest, generation); - walk_ctx_loop_next(rc, wsk); - continue; - } - - if (hash == NULL) - log_validation_status(rc, &uri, tainted_by_not_being_in_manifest, generation); - else if (w->stale_manifest) - log_validation_status(rc, &uri, tainted_by_stale_manifest, generation); - - if (endswith(uri.s, ".roa")) { - check_roa(rc, wsk, &uri, hash, hashlen); - walk_ctx_loop_next(rc, wsk); - continue; - } - - if (endswith(uri.s, ".gbr")) { - check_ghostbuster(rc, wsk, &uri, hash, hashlen); - walk_ctx_loop_next(rc, wsk); - continue; - } - - if (endswith(uri.s, ".cer")) { - certinfo_t certinfo; - X509 *x = check_cert(rc, wsk, &uri, &certinfo, hash, hashlen); - if (!walk_ctx_stack_push(wsk, x, &certinfo)) - walk_ctx_loop_next(rc, wsk); - continue; - } - - log_validation_status(rc, &uri, unknown_object_type_skipped, object_generation_null); - walk_ctx_loop_next(rc, wsk); - continue; - - case walk_state_done: - - walk_ctx_stack_pop(wsk); /* Resume our issuer's state */ - continue; - - } - } - - assert(walk_ctx_stack_head(wsk) == NULL); - walk_ctx_stack_free(wsk); -} - -/** - * Check a trust anchor. Yes, we trust it, by definition, but it - * still needs to conform to the certificate profile, the - * self-signature must be correct, etcetera. - * - * Ownership of the TA certificate object passes to this function when - * called (ie, freeing "x" is our responsibility). - */ -static int check_ta(rcynic_ctx_t *rc, X509 *x, const uri_t *uri, - const path_t *path1, const path_t *path2, - const object_generation_t generation) -{ - STACK_OF(walk_ctx_t) *wsk = NULL; - walk_ctx_t *w = NULL; - - assert(rc && x && uri && path1 && path2); - - if (x == NULL) - return 1; - - if ((wsk = walk_ctx_stack_new()) == NULL) { - logmsg(rc, log_sys_err, "Couldn't allocate walk context stack"); - X509_free(x); - return 0; - } - - if ((w = walk_ctx_stack_push(wsk, x, NULL)) == NULL) { - logmsg(rc, log_sys_err, "Couldn't push walk context stack"); - walk_ctx_stack_free(wsk); - X509_free(x); - return 0; - } - - if (!check_x509(rc, wsk, uri, x, NULL, generation)) { - log_validation_status(rc, uri, object_rejected, generation); - walk_ctx_stack_free(wsk); - return 1; - } - - logmsg(rc, log_telemetry, "Copying trust anchor %s to %s", path1->s, path2->s); - - if (!mkdir_maybe(rc, path2) || !cp_ln(rc, path1, path2)) { - walk_ctx_stack_free(wsk); - return 0; - } - - log_validation_status(rc, uri, object_accepted, generation); - task_add(rc, walk_cert, wsk); - return 1; -} - - - -/** - * Check a trust anchor read from a local file. - */ -static int check_ta_cer(rcynic_ctx_t *rc, - const char *fn) - -{ - path_t path1, path2; - unsigned long hash; - X509 *x = NULL; - uri_t uri; - int i; - - assert(rc && fn); - - logmsg(rc, log_telemetry, "Processing trust anchor from file %s", fn); - - if (strlen(fn) >= sizeof(path1.s)) { - logmsg(rc, log_usage_err, "Trust anchor path name too long %s", fn); - return 0; - } - strcpy(path1.s, fn); - filename_to_uri(&uri, path1.s); - - if ((x = read_cert(&path1, NULL)) == NULL) { - logmsg(rc, log_usage_err, "Couldn't read trust anchor from file %s", fn); - log_validation_status(rc, &uri, unreadable_trust_anchor, object_generation_null); - goto lose; - } - - hash = X509_subject_name_hash(x); - - for (i = 0; i < INT_MAX; i++) { - if (snprintf(path2.s, sizeof(path2.s), "%s%lx.%d.cer", - rc->new_authenticated.s, hash, i) >= sizeof(path2.s)) { - logmsg(rc, log_sys_err, - "Couldn't construct path name for trust anchor %s", path1.s); - goto lose; - } - if (access(path2.s, F_OK)) - break; - } - if (i == INT_MAX) { - logmsg(rc, log_sys_err, "Couldn't find a free name for trust anchor %s", path1.s); - goto lose; - } - - return check_ta(rc, x, &uri, &path1, &path2, object_generation_null); - - lose: - log_validation_status(rc, &uri, trust_anchor_skipped, object_generation_null); - X509_free(x); - return 0; -} - - - -/** - * Allocate a new tal_ctx_t. - */ -static tal_ctx_t *tal_ctx_t_new(void) -{ - tal_ctx_t *tctx = malloc(sizeof(*tctx)); - if (tctx) - memset(tctx, 0, sizeof(*tctx)); - return tctx; -} - -/** - * Free a tal_ctx_t. - */ -static void tal_ctx_t_free(tal_ctx_t *tctx) -{ - if (tctx) { - EVP_PKEY_free(tctx->pkey); - free(tctx); - } -} - -/** - * Read a trust anchor from disk and compare with known public key. - * - * NB: EVP_PKEY_cmp() returns 1 for match, not 0 like every other - * xyz_cmp() function in the entire OpenSSL library. Go figure. - */ -static int check_ta_tal_callback_1(rcynic_ctx_t *rc, - const tal_ctx_t *tctx, - object_generation_t generation) - -{ - const path_t *prefix = NULL; - EVP_PKEY *pkey = NULL; - X509 *x = NULL; - path_t path; - int ret = 0; - - switch (generation) { - case object_generation_current: - prefix = &rc->unauthenticated; - break; - case object_generation_backup: - prefix = &rc->old_authenticated; - break; - default: - goto done; - } - - if (!uri_to_filename(rc, &tctx->uri, &path, prefix)) { - log_validation_status(rc, &tctx->uri, unreadable_trust_anchor_locator, generation); - goto done; - } - - if ((x = read_cert(&path, NULL)) == NULL || (pkey = X509_get_pubkey(x)) == NULL) { - log_validation_status(rc, &tctx->uri, unreadable_trust_anchor, generation); - goto done; - } - - if (EVP_PKEY_cmp(tctx->pkey, pkey) != 1) { - log_validation_status(rc, &tctx->uri, trust_anchor_key_mismatch, generation); - goto done; - } - - ret = check_ta(rc, x, &tctx->uri, &path, &tctx->path, generation); - x = NULL; - - done: - if (!ret) - log_validation_status(rc, &tctx->uri, object_rejected, generation); - EVP_PKEY_free(pkey); - X509_free(x); - return ret; -} - -/** - * rsync callback for fetching a TAL. - */ -static void rsync_tal_callback(rcynic_ctx_t *rc, - const rsync_ctx_t *ctx, - const rsync_status_t status, - const uri_t *uri, - void *cookie) -{ - tal_ctx_t *tctx = cookie; - - assert(rc && tctx); - - if (status == rsync_status_pending) - return; - - if (!check_ta_tal_callback_1(rc, tctx, object_generation_current) && - !check_ta_tal_callback_1(rc, tctx, object_generation_backup)) - log_validation_status(rc, &tctx->uri, trust_anchor_skipped, object_generation_null); - - tal_ctx_t_free(tctx); -} - -/** - * Check a trust anchor read from a trust anchor locator (TAL). - */ -static int check_ta_tal(rcynic_ctx_t *rc, - const char *fn) - -{ - tal_ctx_t *tctx = NULL; - BIO *bio = NULL; - int ret = 1; - - assert(rc && fn); - - logmsg(rc, log_telemetry, "Processing trust anchor locator from file %s", fn); - - if ((tctx = tal_ctx_t_new()) == NULL) { - logmsg(rc, log_sys_err, "malloc(tal_ctxt_t) failed"); - goto done; - } - - bio = BIO_new_file(fn, "r"); - - if (!bio) - logmsg(rc, log_usage_err, "Couldn't open trust anchor locator file %s", fn); - - if (!bio || BIO_gets(bio, tctx->uri.s, sizeof(tctx->uri.s)) <= 0) { - uri_t furi; - filename_to_uri(&furi, fn); - log_validation_status(rc, &furi, unreadable_trust_anchor_locator, object_generation_null); - goto done; - } - - tctx->uri.s[strcspn(tctx->uri.s, " \t\r\n")] = '\0'; - - if (!uri_to_filename(rc, &tctx->uri, &tctx->path, &rc->new_authenticated)) { - log_validation_status(rc, &tctx->uri, unreadable_trust_anchor_locator, object_generation_null); - goto done; - } - - if (!endswith(tctx->uri.s, ".cer")) { - log_validation_status(rc, &tctx->uri, malformed_tal_uri, object_generation_null); - goto done; - } - - bio = BIO_push(BIO_new(BIO_f_linebreak()), bio); - bio = BIO_push(BIO_new(BIO_f_base64()), bio); - if (bio) - tctx->pkey = d2i_PUBKEY_bio(bio, NULL); - if (!tctx->pkey) { - log_validation_status(rc, &tctx->uri, unreadable_trust_anchor_locator, object_generation_null); - goto done; - } - - logmsg(rc, log_telemetry, "Processing trust anchor from URI %s", tctx->uri.s); - - rsync_ta(rc, &tctx->uri, tctx, rsync_tal_callback); - tctx = NULL; /* Control has passed */ - - done: - tal_ctx_t_free(tctx); - BIO_free_all(bio); - return ret; -} - -/** - * Check a directory of trust anchors and trust anchor locators. - */ -static int check_ta_dir(rcynic_ctx_t *rc, - const char *dn) -{ - DIR *dir = NULL; - struct dirent *d; - path_t path; - int is_cer, is_tal; - - assert(rc && dn); - - if ((dir = opendir(dn)) == NULL) { - logmsg(rc, log_sys_err, "Couldn't open trust anchor directory %s: %s", - dn, strerror(errno)); - return 0; - } - - while ((d = readdir(dir)) != NULL) { - if (snprintf(path.s, sizeof(path.s), "%s/%s", dn, d->d_name) >= sizeof(path.s)) { - logmsg(rc, log_data_err, "Pathname %s/%s too long", dn, d->d_name); - break; - } - is_cer = endswith(path.s, ".cer"); - is_tal = endswith(path.s, ".tal"); - if (is_cer && !check_ta_cer(rc, path.s)) - break; - if (is_tal && !check_ta_tal(rc, path.s)) - break; - if (!is_cer && !is_tal) - logmsg(rc, log_verbose, "Skipping non-trust-anchor %s", path.s); - } - - if (dir != NULL) - closedir(dir); - - return !d;; -} - - - -/** - * Write detailed log of what we've done as an XML file. - */ -static int write_xml_file(const rcynic_ctx_t *rc, - const char *xmlfile) -{ - int i, j, use_stdout, ok; - char hostname[HOSTNAME_MAX]; - mib_counter_t code; - timestamp_t ts; - FILE *f = NULL; - path_t xmltemp; - - if (xmlfile == NULL) - return 1; - - use_stdout = !strcmp(xmlfile, "-"); - - logmsg(rc, log_telemetry, "Writing XML summary to %s", - (use_stdout ? "standard output" : xmlfile)); - - if (use_stdout) { - f = stdout; - ok = 1; - } else if (snprintf(xmltemp.s, sizeof(xmltemp.s), "%s.%u.tmp", xmlfile, (unsigned) getpid()) >= sizeof(xmltemp.s)) { - logmsg(rc, log_usage_err, "Filename \"%s\" is too long, not writing XML", xmlfile); - return 0; - } else { - ok = (f = fopen(xmltemp.s, "w")) != NULL; - } - - ok &= gethostname(hostname, sizeof(hostname)) == 0; - - if (ok) - ok &= fprintf(f, "<?xml version=\"1.0\" ?>\n" - "<rcynic-summary date=\"%s\" rcynic-version=\"%s\"" - " summary-version=\"%d\" reporting-hostname=\"%s\">\n" - " <labels>\n", - time_to_string(&ts, NULL), - svn_id, XML_SUMMARY_VERSION, hostname) != EOF; - - for (j = 0; ok && j < MIB_COUNTER_T_MAX; ++j) - ok &= fprintf(f, " <%s kind=\"%s\">%s</%s>\n", - mib_counter_label[j], mib_counter_kind[j], - (mib_counter_desc[j] - ? mib_counter_desc[j] - : X509_verify_cert_error_string(mib_counter_openssl[j])), - mib_counter_label[j]) != EOF; - - if (ok) - ok &= fprintf(f, " </labels>\n") != EOF; - - for (i = 0; ok && i < sk_validation_status_t_num(rc->validation_status); i++) { - validation_status_t *v = sk_validation_status_t_value(rc->validation_status, i); - assert(v); - - (void) time_to_string(&ts, &v->timestamp); - - for (code = (mib_counter_t) 0; ok && code < MIB_COUNTER_T_MAX; code++) { - if (validation_status_get_code(v, code)) { - if (ok) - ok &= fprintf(f, " <validation_status timestamp=\"%s\" status=\"%s\"", - ts.s, mib_counter_label[code]) != EOF; - if (ok && (v->generation == object_generation_current || - v->generation == object_generation_backup)) - ok &= fprintf(f, " generation=\"%s\"", - object_generation_label[v->generation]) != EOF; - if (ok) - ok &= fprintf(f, ">%s</validation_status>\n", v->uri.s) != EOF; - } - } - } - - for (i = 0; ok && i < sk_rsync_history_t_num(rc->rsync_history); i++) { - rsync_history_t *h = sk_rsync_history_t_value(rc->rsync_history, i); - assert(h); - - if (ok) - ok &= fprintf(f, " <rsync_history") != EOF; - if (ok && h->started) - ok &= fprintf(f, " started=\"%s\"", - time_to_string(&ts, &h->started)) != EOF; - if (ok && h->finished) - ok &= fprintf(f, " finished=\"%s\"", - time_to_string(&ts, &h->finished)) != EOF; - if (ok && h->status != rsync_status_done) - ok &= fprintf(f, " error=\"%u\"", (unsigned) h->status) != EOF; - if (ok) - ok &= fprintf(f, ">%s%s</rsync_history>\n", - h->uri.s, (h->final_slash ? "/" : "")) != EOF; - } - - if (ok) - ok &= fprintf(f, "</rcynic-summary>\n") != EOF; - - if (f && !use_stdout) - ok &= fclose(f) != EOF; - - if (ok && !use_stdout) - ok &= rename(xmltemp.s, xmlfile) == 0; - - if (!ok) - logmsg(rc, log_sys_err, "Couldn't write XML summary to %s: %s", - (use_stdout ? "standard output" : xmlfile), strerror(errno)); - - if (!ok && !use_stdout) - (void) unlink(xmltemp.s); - - return ok; -} - - - -/** - * Long options. - */ -#define OPTIONS \ - QA('a', "authenticated", "root of authenticated data tree") \ - QA('c', "config", "override default name of config file") \ - QF('h', "help", "print this help message") \ - QA('j', "jitter", "set jitter value") \ - QA('l', "log-level", "set log level") \ - QA('u', "unauthenticated", "root of unauthenticated data tree") \ - QF('e', "use-stderr", "log to syslog") \ - QF('s', "use-syslog", "log to stderr") \ - QF('V', "version", "print program version") \ - QA('x', "xml-file", "set XML output file location") - -const static struct option longopts[] = { - { "authenticated", required_argument, NULL, 'a' }, - { "config", required_argument, NULL, 'c' }, - { "help", no_argument, NULL, 'h' }, - { "jitter", required_argument, NULL, 'j' }, - { "log-level", required_argument, NULL, 'l' }, - { "unauthenticated", required_argument, NULL, 'u' }, - { "use-stderr", no_argument, NULL, 'e' }, - { "use-syslog", no_argument, NULL, 's' }, - { "version", no_argument, NULL, 'V' }, - { "xml-file", required_argument, NULL, 'x' }, - { NULL } -}; - -/** - * Wrapper around printf() to take arguments like logmsg(). - * If C had closures, usage() would use them instead of this silliness. - */ -static void logmsg_printf(const rcynic_ctx_t *rc, - const log_level_t level, - const char *fmt, ...) -{ - va_list ap; - va_start(ap, fmt); - vprintf(fmt, ap); - putchar('\n'); - va_end(ap); -} - -/** - * Log usage message, either to stdout (for --help) or via logmsg(). - */ -static void usage (const rcynic_ctx_t *rc, const char *jane) -{ - void (*log)(const rcynic_ctx_t *, const log_level_t, const char *, ...) = rc ? logmsg : logmsg_printf; - char left[80]; - - if (rc && !jane) - jane = rc->jane; - - log(rc, log_usage_err, "usage: %s [options]", jane); - log(rc, log_usage_err, "options:"); - -#define QF(_s_, _l_, _d_) \ - (void) snprintf(left, sizeof(left), "-%c --%-32s", _s_, _l_); \ - log(rc, log_usage_err, " %s%s", left, _d_); - -#define QA(_s_, _l_, _d_) \ - (void) snprintf(left, sizeof(left), "-%c ARG --%-32s", _s_, _l_ " ARG"); \ - log(rc, log_usage_err, " %s%s", left, _d_); - - OPTIONS; - -#undef QA -#undef QF -} - -/** - * Main program. Parse command line, read config file, iterate over - * trust anchors found via config file and do a tree walk for each - * trust anchor. - */ -int main(int argc, char *argv[]) -{ - int opt_jitter = 0, use_syslog = 0, use_stderr = 0, syslog_facility = 0; - int opt_syslog = 0, opt_stderr = 0, opt_level = 0, prune = 1; - int opt_auth = 0, opt_unauth = 0, keep_lockfile = 0; - char *lockfile = NULL, *xmlfile = NULL; - char *cfg_file = "rcynic.conf"; - int c, i, ret = 1, jitter = 600, lockfd = -1; - STACK_OF(CONF_VALUE) *cfg_section = NULL; - CONF *cfg_handle = NULL; - time_t start = 0, finish; - rcynic_ctx_t rc; - unsigned delay; - long eline = 0; - path_t ta_dir; - -#define QF(_s_, _l_, _d_) _s_, -#define QA(_s_, _l_, _d_) _s_, ':', - - const static char short_opts[] = { OPTIONS '\0' }; - -#undef QA -#undef QF - -#define QF(_s_, _l_, _d_) { _l_, no_argument, NULL, _s_ }, -#define QA(_s_, _l_, _d_) { _l_, required_argument, NULL, _s_ }, - - static struct option long_opts[] = { OPTIONS { NULL } }; - -#undef QA -#undef QF - - memset(&rc, 0, sizeof(rc)); - - if ((rc.jane = strrchr(argv[0], '/')) == NULL) - rc.jane = argv[0]; - else - rc.jane++; - - rc.log_level = log_data_err; - rc.allow_stale_crl = 1; - rc.allow_stale_manifest = 1; - rc.allow_digest_mismatch = 1; - rc.allow_crl_digest_mismatch = 1; - rc.allow_nonconformant_name = 1; - rc.allow_ee_without_signedObject = 1; - rc.allow_1024_bit_ee_key = 1; - rc.allow_wrong_cms_si_attributes = 1; - rc.max_parallel_fetches = 1; - rc.max_retries = 3; - rc.retry_wait_min = 30; - rc.run_rsync = 1; - rc.rsync_timeout = 300; - rc.max_select_time = 30; - rc.rsync_early = 1; - -#define QQ(x,y) rc.priority[x] = y; - LOG_LEVELS; -#undef QQ - - if (!set_directory(&rc, &rc.authenticated, "rcynic-data/authenticated", 0) || - !set_directory(&rc, &rc.unauthenticated, "rcynic-data/unauthenticated/", 1)) - goto done; - - OpenSSL_add_all_algorithms(); - ERR_load_crypto_strings(); - - if (!create_missing_nids()) { - logmsg(&rc, log_sys_err, "Couldn't initialize missing OIDs!"); - goto done; - } - - memset(&ta_dir, 0, sizeof(ta_dir)); - - opterr = 0; - - while ((c = getopt_long(argc, argv, short_opts, long_opts, NULL)) > 0) { - switch (c) { - case 'a': - opt_auth = 1; - if (!set_directory(&rc, &rc.authenticated, optarg, 0)) - goto done; - break; - case 'c': - cfg_file = optarg; - break; - case 'l': - opt_level = 1; - if (!configure_logmsg(&rc, optarg)) - goto done; - break; - case 's': - use_syslog = opt_syslog = 1; - break; - case 'e': - use_stderr = opt_stderr = 1; - break; - case 'h': - usage(NULL, rc.jane); - ret = 0; - goto done; - case 'j': - if (!configure_integer(&rc, &jitter, optarg)) - goto done; - opt_jitter = 1; - break; - case 'u': - opt_unauth = 1; - if (!set_directory(&rc, &rc.unauthenticated, optarg, 1)) - goto done; - break; - case 'V': - puts(svn_id); - ret = 0; - goto done; - case 'x': - xmlfile = strdup(optarg); - break; - default: - usage(&rc, NULL); - goto done; - } - } - - if (!(asn1_zero = s2i_ASN1_INTEGER(NULL, "0x0")) || - !(asn1_four_octets = s2i_ASN1_INTEGER(NULL, "0xFFFFFFFF")) || - !(asn1_twenty_octets = s2i_ASN1_INTEGER(NULL, "0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF")) || - !(NID_binary_signing_time = OBJ_create("1.2.840.113549.1.9.16.2.46", - "id-aa-binarySigningTime", - "id-aa-binarySigningTime"))) { - logmsg(&rc, log_sys_err, "Couldn't initialize ASN.1 constants!"); - goto done; - } - - if ((cfg_handle = NCONF_new(NULL)) == NULL) { - logmsg(&rc, log_sys_err, "Couldn't create CONF opbject"); - goto done; - } - - if (NCONF_load(cfg_handle, cfg_file, &eline) <= 0) { - if (eline <= 0) - logmsg(&rc, log_usage_err, "Couldn't load config file %s", cfg_file); - else - logmsg(&rc, log_usage_err, "Error on line %ld of config file %s", eline, cfg_file); - goto done; - } - - if (CONF_modules_load(cfg_handle, NULL, 0) <= 0) { - logmsg(&rc, log_sys_err, "Couldn't configure OpenSSL"); - goto done; - } - - if ((cfg_section = NCONF_get_section(cfg_handle, "rcynic")) == NULL) { - logmsg(&rc, log_usage_err, "Couldn't load rcynic section from config file"); - goto done; - } - - for (i = 0; i < sk_CONF_VALUE_num(cfg_section); i++) { - CONF_VALUE *val = sk_CONF_VALUE_value(cfg_section, i); - - assert(val && val->name && val->value); - - if (!opt_auth && - !name_cmp(val->name, "authenticated") && - !set_directory(&rc, &rc.authenticated, val->value, 0)) - goto done; - - else if (!opt_unauth && - !name_cmp(val->name, "unauthenticated") && - !set_directory(&rc, &rc.unauthenticated, val->value, 1)) - goto done; - - else if (!name_cmp(val->name, "trust-anchor-directory") && - !set_directory(&rc, &ta_dir, val->value, 0)) - goto done; - - else if (!name_cmp(val->name, "rsync-timeout") && - !configure_integer(&rc, &rc.rsync_timeout, val->value)) - goto done; - - else if (!name_cmp(val->name, "max-parallel-fetches") && - !configure_integer(&rc, &rc.max_parallel_fetches, val->value)) - goto done; - - else if (!name_cmp(val->name, "max-select-time") && - !configure_unsigned_integer(&rc, &rc.max_select_time, val->value)) - goto done; - - else if (!name_cmp(val->name, "rsync-program")) - rc.rsync_program = strdup(val->value); - - else if (!name_cmp(val->name, "lockfile")) - lockfile = strdup(val->value); - - else if (!name_cmp(val->name, "keep-lockfile") && - !configure_boolean(&rc, &keep_lockfile, val->value)) - goto done; - - else if (!opt_jitter && - !name_cmp(val->name, "jitter") && - !configure_integer(&rc, &jitter, val->value)) - goto done; - - else if (!opt_level && - !name_cmp(val->name, "log-level") && - !configure_logmsg(&rc, val->value)) - goto done; - - else if (!opt_syslog && - !name_cmp(val->name, "use-syslog") && - !configure_boolean(&rc, &use_syslog, val->value)) - goto done; - - else if (!opt_stderr && - !name_cmp(val->name, "use-stderr") && - !configure_boolean(&rc, &use_stderr, val->value)) - goto done; - - else if (!name_cmp(val->name, "syslog-facility") && - !configure_syslog(&rc, &syslog_facility, - facilitynames, val->value)) - goto done; - - else if (!xmlfile && - (!name_cmp(val->name, "xml-file") || - !name_cmp(val->name, "xml-summary"))) - xmlfile = strdup(val->value); - - else if (!name_cmp(val->name, "allow-stale-crl") && - !configure_boolean(&rc, &rc.allow_stale_crl, val->value)) - goto done; - - else if (!name_cmp(val->name, "allow-stale-manifest") && - !configure_boolean(&rc, &rc.allow_stale_manifest, val->value)) - goto done; - - else if (!name_cmp(val->name, "allow-non-self-signed-trust-anchor") && - !configure_boolean(&rc, &rc.allow_non_self_signed_trust_anchor, val->value)) - goto done; - - else if (!name_cmp(val->name, "require-crl-in-manifest") && - !configure_boolean(&rc, &rc.require_crl_in_manifest, val->value)) - goto done; - - else if (!name_cmp(val->name, "allow-object-not-in-manifest") && - !configure_boolean(&rc, &rc.allow_object_not_in_manifest, val->value)) - goto done; - - else if (!name_cmp(val->name, "allow-digest-mismatch") && - !configure_boolean(&rc, &rc.allow_digest_mismatch, val->value)) - goto done; - - else if (!name_cmp(val->name, "allow-crl-digest-mismatch") && - !configure_boolean(&rc, &rc.allow_crl_digest_mismatch, val->value)) - goto done; - - else if (!name_cmp(val->name, "use-links") && - !configure_boolean(&rc, &rc.use_links, val->value)) - goto done; - - else if (!name_cmp(val->name, "prune") && - !configure_boolean(&rc, &prune, val->value)) - goto done; - - else if (!name_cmp(val->name, "run-rsync") && - !configure_boolean(&rc, &rc.run_rsync, val->value)) - goto done; - - else if (!name_cmp(val->name, "allow-nonconformant-name") && - !configure_boolean(&rc, &rc.allow_nonconformant_name, val->value)) - goto done; - - else if (!name_cmp(val->name, "allow-ee-without-signedObject") && - !configure_boolean(&rc, &rc.allow_ee_without_signedObject, val->value)) - goto done; - - else if (!name_cmp(val->name, "allow-1024-bit-ee-key") && - !configure_boolean(&rc, &rc.allow_1024_bit_ee_key, val->value)) - goto done; - - else if (!name_cmp(val->name, "allow-wrong-cms-si-attributes") && - !configure_boolean(&rc, &rc.allow_wrong_cms_si_attributes, val->value)) - goto done; - - else if (!name_cmp(val->name, "rsync-early") && - !configure_boolean(&rc, &rc.rsync_early, val->value)) - goto done; - - /* - * Ugly, but the easiest way to handle all these strings. - */ - -#define QQ(x,y) \ - else if (!name_cmp(val->name, "syslog-priority-" #x) && \ - !configure_syslog(&rc, &rc.priority[x], \ - prioritynames, val->value)) \ - goto done; - - LOG_LEVELS; /* the semicolon is for emacs */ - -#undef QQ - - } - - if ((rc.rsync_history = sk_rsync_history_t_new(rsync_history_cmp)) == NULL) { - logmsg(&rc, log_sys_err, "Couldn't allocate rsync_history stack"); - goto done; - } - - if ((rc.validation_status = sk_validation_status_t_new_null()) == NULL) { - logmsg(&rc, log_sys_err, "Couldn't allocate validation_status stack"); - goto done; - } - - if ((rc.x509_store = X509_STORE_new()) == NULL) { - logmsg(&rc, log_sys_err, "Couldn't allocate X509_STORE"); - goto done; - } - - if ((rc.rsync_queue = sk_rsync_ctx_t_new_null()) == NULL) { - logmsg(&rc, log_sys_err, "Couldn't allocate rsync_queue"); - goto done; - } - - if ((rc.task_queue = sk_task_t_new_null()) == NULL) { - logmsg(&rc, log_sys_err, "Couldn't allocate task_queue"); - goto done; - } - - rc.use_syslog = use_syslog; - - if (use_syslog) - openlog(rc.jane, - LOG_PID | (use_stderr ? LOG_PERROR : 0), - (syslog_facility ? syslog_facility : LOG_LOCAL0)); - - if (jitter > 0) { - if (RAND_bytes((unsigned char *) &delay, sizeof(delay)) <= 0) { - logmsg(&rc, log_sys_err, "Couldn't read random bytes"); - goto done; - } - delay %= jitter; - logmsg(&rc, log_telemetry, "Delaying %u seconds before startup", delay); - while (delay > 0) - delay = sleep(delay); - } - - if (lockfile && - ((lockfd = open(lockfile, O_RDWR|O_CREAT|O_NONBLOCK, 0666)) < 0 || - lockf(lockfd, F_TLOCK, 0) < 0)) { - if (lockfd >= 0 && errno == EAGAIN) - logmsg(&rc, log_telemetry, "Lock %s held by another process", lockfile); - else - logmsg(&rc, log_sys_err, "Problem locking %s: %s", lockfile, strerror(errno)); - lockfd = -1; - goto done; - } - - start = time(0); - logmsg(&rc, log_telemetry, "Starting"); - - if (!construct_directory_names(&rc)) - goto done; - - if (!access(rc.new_authenticated.s, F_OK)) { - logmsg(&rc, log_sys_err, - "Timestamped output directory %s already exists! Clock went backwards?", - rc.new_authenticated.s); - goto done; - } - - if (!mkdir_maybe(&rc, &rc.new_authenticated)) { - logmsg(&rc, log_sys_err, "Couldn't prepare directory %s: %s", - rc.new_authenticated.s, strerror(errno)); - goto done; - } - - for (i = 0; i < sk_CONF_VALUE_num(cfg_section); i++) { - CONF_VALUE *val = sk_CONF_VALUE_value(cfg_section, i); - - assert(val && val->name && val->value); - - if (!name_cmp(val->name, "trust-anchor-uri-with-key") || - !name_cmp(val->name, "indirect-trust-anchor")) { - logmsg(&rc, log_usage_err, - "Directive \"%s\" is obsolete -- please use \"trust-anchor-locator\" instead", - val->name); - goto done; - } - - if ((!name_cmp(val->name, "trust-anchor") && !check_ta_cer(&rc, val->value)) || - (!name_cmp(val->name, "trust-anchor-locator") && !check_ta_tal(&rc, val->value))) - goto done; - } - - if (*ta_dir.s != '\0' && !check_ta_dir(&rc, ta_dir.s)) - goto done; - - while (sk_task_t_num(rc.task_queue) > 0 || sk_rsync_ctx_t_num(rc.rsync_queue) > 0) { - task_run_q(&rc); - rsync_mgr(&rc); - } - - logmsg(&rc, log_telemetry, "Event loop done, beginning final output and cleanup"); - - if (!finalize_directories(&rc)) - goto done; - - if (prune && rc.run_rsync && - !prune_unauthenticated(&rc, &rc.unauthenticated, - strlen(rc.unauthenticated.s))) { - logmsg(&rc, log_sys_err, "Trouble pruning old unauthenticated data"); - goto done; - } - - if (!write_xml_file(&rc, xmlfile)) - goto done; - - ret = 0; - - done: - log_openssl_errors(&rc); - - /* - * Do NOT free cfg_section, NCONF_free() takes care of that - */ - sk_validation_status_t_pop_free(rc.validation_status, validation_status_t_free); - sk_rsync_history_t_pop_free(rc.rsync_history, rsync_history_t_free); - validation_status_t_free(rc.validation_status_in_waiting); - X509_STORE_free(rc.x509_store); - NCONF_free(cfg_handle); - CONF_modules_free(); - EVP_cleanup(); - ERR_free_strings(); - if (rc.rsync_program) - free(rc.rsync_program); - if (lockfile && lockfd >= 0 && !keep_lockfile) - unlink(lockfile); - if (lockfile) - free(lockfile); - if (xmlfile) - free(xmlfile); - - if (start) { - finish = time(0); - logmsg(&rc, log_telemetry, - "Finished, elapsed time %u:%02u:%02u", - (unsigned) ((finish - start) / 3600), - (unsigned) ((finish - start) / 60 % 60), - (unsigned) ((finish - start) % 60)); - } - - return ret; -} |