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/* $Id$ */
/*
* Extract and test URIs from certificates. This is a unit test of
* rcynic code, a utility, or both, depending on how it turns out.
*
* NB: OpenSSL insures that IA5 strings are null-terminated, so it's safe
* for us to ignore the length count.
*/
#include <stdio.h>
#include <string.h>
#include <unistd.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>
static const unsigned char id_ad_caIssuers[] = {0x2b, 0x6, 0x1, 0x5, 0x5, 0x7, 0x30, 0x2}; /* 1.3.6.1.5.5.7.48.2 */
static const unsigned char id_ad_caRepository[] = {0x2b, 0x6, 0x1, 0x5, 0x5, 0x7, 0x30, 0x5}; /* 1.3.6.1.5.5.7.48.5 */
static const unsigned char id_ad_signedObjectRepository[] = {0x2b, 0x6, 0x1, 0x5, 0x5, 0x7, 0x30, 0x9}; /* 1.3.6.1.5.5.7.48.9 */
static const unsigned char id_ad_rpkiManifest[] = {0x2b, 0x6, 0x1, 0x5, 0x5, 0x7, 0x30, 0xa}; /* 1.3.6.1.5.5.7.48.10 */
static const unsigned char id_ad_signedObject[] = {0x2b, 0x6, 0x1, 0x5, 0x5, 0x7, 0x30, 0xb}; /* 1.3.6.1.5.5.7.48.11 */
static X509 *read_cert(const char *filename, int format, int verbose)
{
X509 *x = NULL;
BIO *b;
if ((b = BIO_new_file(filename, "r")) != NULL) {
switch (format) {
case 'p':
x = PEM_read_bio_X509_AUX(b, NULL, NULL, NULL);
break;
case 'd':
x = d2i_X509_bio(b, NULL);
break;
}
if (verbose && x != NULL) {
X509_print_fp(stdout, x);
printf("\n");
}
}
BIO_free(b);
return x;
}
enum decode_errors {
decode_ok,
decode_no_extension,
decode_not_exactly_one_DistributionPointName,
decode_has_reasons,
decode_has_CRLissuer,
decode_no_distributionPoint,
decode_not_GeneralName,
decode_not_URI,
};
static enum decode_errors decode_crldp(X509 *x, int verbose)
{
enum decode_errors err = decode_ok;
STACK_OF(DIST_POINT) *ds = X509_get_ext_d2i(x, NID_crl_distribution_points, NULL, NULL);
DIST_POINT *d;
GENERAL_NAME *n;
int i;
if (!ds) {
err = decode_no_extension;
} else if (sk_DIST_POINT_num(ds) != 1) {
err = decode_not_exactly_one_DistributionPointName;
} else if ((d = sk_DIST_POINT_value(ds, 0))->reasons) {
err = decode_has_reasons;
} else if (d->CRLissuer) {
err = decode_has_CRLissuer;
} else if (!d->distpoint) {
err = decode_no_distributionPoint;
} else if (d->distpoint->type != 0) {
err = decode_not_GeneralName;
} else {
for (i = 0; i < sk_GENERAL_NAME_num(d->distpoint->name.fullname); i++) {
n = sk_GENERAL_NAME_value(d->distpoint->name.fullname, i);
if (n->type != GEN_URI) {
err = decode_not_GeneralName;
break;
}
printf(" CRLDP: %s\n", n->d.uniformResourceIdentifier->data);
}
}
sk_DIST_POINT_pop_free(ds, DIST_POINT_free);
return err;
}
#define decode_xia(_x_, _v_, _tag_, _nid_, _oid_) _decode_xia(_x_, _v_, _tag_, _nid_, _oid_, sizeof(_oid_))
static enum decode_errors _decode_xia(X509 *x,
int verbose,
char *tag,
int nid,
const unsigned char *oid,
int oidlen)
{
enum decode_errors err = decode_ok;
AUTHORITY_INFO_ACCESS *as = X509_get_ext_d2i(x, nid, NULL, NULL);
ACCESS_DESCRIPTION *a;
int i;
if (!as) {
err = decode_no_extension;
} else {
for (i = 0; i < sk_ACCESS_DESCRIPTION_num(as); i++) {
a = sk_ACCESS_DESCRIPTION_value(as, i);
if (a->location->type != GEN_URI) {
err = decode_not_URI;
break;
}
if (a->method->length == oidlen && !memcmp(a->method->data, oid, oidlen))
printf(" %s: %s\n", tag, a->location->d.uniformResourceIdentifier->data);
}
}
sk_ACCESS_DESCRIPTION_pop_free(as, ACCESS_DESCRIPTION_free);
return err;
}
int main(int argc, char *argv[])
{
int c, format = 'd', ret = 0, verbose = 0;
X509 *x;
OpenSSL_add_all_algorithms();
ERR_load_crypto_strings();
while ((c = getopt(argc, argv, "pdv")) > 0) {
switch (c) {
case 'v':
verbose = 1;
break;
case 'p':
case 'd':
format = c;
break;
default:
fprintf(stderr, "usage: %s [-p | -d] cert [cert...]\n", argv[0]);
ret = 1;
}
}
if (ret == 0) {
argc -= optind;
argv += optind;
while (argc-- > 0) {
printf("File: %s\n", *argv);
if ((x = read_cert(*argv++, format, verbose)) == NULL) {
printf("Couldn't read certificate, skipping\n");
continue;
}
decode_xia(x, verbose, "AIA:caIssuers", NID_info_access, id_ad_caIssuers);
decode_xia(x, verbose, "SIA:caRepository", NID_sinfo_access, id_ad_caRepository);
decode_xia(x, verbose, "SIA:signedObjectRepository", NID_sinfo_access, id_ad_signedObjectRepository);
decode_xia(x, verbose, "SIA:rpkiManifest", NID_sinfo_access, id_ad_rpkiManifest);
decode_xia(x, verbose, "SIA:signedObject", NID_sinfo_access, id_ad_signedObject);
decode_crldp(x, verbose);
X509_free(x);
}
}
EVP_cleanup();
ERR_free_strings();
return ret;
}
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