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/*
* Copyright (C) 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 notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND ARIN DISCLAIMS ALL WARRANTIES WITH
* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS. IN NO EVENT SHALL 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.
*/
/* $Id$ */
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.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>
#include <openssl/conf.h>
#include <openssl/rand.h>
#include <openssl/asn1.h>
#include <openssl/asn1t.h>
#include <openssl/cms.h>
/*
* ASN.1 templates for signed manifests. Not sure that ASN1_EXP_OPT()
* is the right macro for "version", but it's what the examples for
* this construction use. Probably doesn't matter since this program
* only decodes manifests, never encodes them.
*/
typedef struct FileAndHash_st {
ASN1_IA5STRING *file;
ASN1_BIT_STRING *hash;
} FileAndHash;
ASN1_SEQUENCE(FileAndHash) = {
ASN1_SIMPLE(FileAndHash, file, ASN1_IA5STRING),
ASN1_SIMPLE(FileAndHash, hash, ASN1_BIT_STRING)
} ASN1_SEQUENCE_END(FileAndHash)
DECLARE_STACK_OF(FileAndHash)
DECLARE_ASN1_FUNCTIONS(FileAndHash)
#define sk_FileAndHash_num(st) SKM_sk_num(FileAndHash, (st))
#define sk_FileAndHash_value(st, i) SKM_sk_value(FileAndHash, (st), (i))
typedef struct Manifest_st {
ASN1_INTEGER *version, *manifestNumber;
ASN1_GENERALIZEDTIME *thisUpdate, *nextUpdate;
ASN1_OBJECT *fileHashAlg;
STACK_OF(FileAndHash) *fileList;
} Manifest;
ASN1_SEQUENCE(Manifest) = {
ASN1_EXP_OPT(Manifest, version, ASN1_INTEGER, 0),
ASN1_SIMPLE(Manifest, manifestNumber, ASN1_INTEGER),
ASN1_SIMPLE(Manifest, thisUpdate, ASN1_GENERALIZEDTIME),
ASN1_SIMPLE(Manifest, nextUpdate, ASN1_GENERALIZEDTIME),
ASN1_SIMPLE(Manifest, fileHashAlg, ASN1_OBJECT),
ASN1_SEQUENCE_OF(Manifest, fileList, FileAndHash)
} ASN1_SEQUENCE_END(Manifest)
/*
* Read certificate in DER format.
*/
static X509 *read_cert(const char *filename)
{
X509 *x = NULL;
BIO *b;
if ((b = BIO_new_file(filename, "r")) != NULL)
x = d2i_X509_bio(b, NULL);
BIO_free(b);
return x;
}
/*
* Read CRL in DER format.
*/
static X509_CRL *read_crl(const char *filename)
{
X509_CRL *crl = NULL;
BIO *b;
if ((b = BIO_new_file(filename, "r")) != NULL)
crl = d2i_X509_CRL_bio(b, NULL);
BIO_free(b);
return crl;
}
/*
* Read manifest (CMS object) in DER format.
*/
static Manifest *read_manifest(const char *filename)
{
CMS_ContentInfo *cms = NULL;
Manifest *m = NULL;
char buf[512];
BIO *b;
int i, j;
if ((b = BIO_new_file(filename, "r")) == NULL ||
(cms = d2i_CMS_bio(b, NULL)) == NULL)
goto done;
BIO_free(b);
#if 0
if ((b = BIO_new(BIO_s_fd())) == NULL)
goto done;
BIO_set_fd(b, 1, BIO_NOCLOSE);
CMS_ContentInfo_print_ctx(b, cms, 0, NULL);
BIO_free(b);
#endif
if ((b = BIO_new(BIO_s_mem())) == NULL ||
CMS_verify(cms, NULL, NULL, NULL, b, CMS_NOCRL | CMS_NO_SIGNER_CERT_VERIFY | CMS_NO_ATTR_VERIFY | CMS_NO_CONTENT_VERIFY) <= 0 ||
(m = ASN1_item_d2i_bio(ASN1_ITEM_rptr(Manifest), b, NULL)) == NULL)
goto done;
if (m->version)
printf("version: %ld\n", ASN1_INTEGER_get(m->version));
else
printf("version: 0 [defaulted]\n");
printf("manifestNumber: %ld\n", ASN1_INTEGER_get(m->manifestNumber));
printf("thisUpdate: %s\n", m->thisUpdate->data);
printf("nextUpdate: %s\n", m->nextUpdate->data);
OBJ_obj2txt(buf, sizeof(buf), m->fileHashAlg, 0);
printf("fileHashAlg: %s\n", buf);
for (i = 0; i < sk_FileAndHash_num(m->fileList); i++) {
FileAndHash *fah = sk_FileAndHash_value(m->fileList, i);
printf(" file[%2d]: %s\n", i, fah->file->data);
printf(" hash[%2d]: ", i);
for (j = 0; j < fah->hash->length; j++)
printf("%02x%s", fah->hash->data[j], j == fah->hash->length - 1 ? "\n" : ":");
}
if (X509_cmp_current_time(m->nextUpdate) < 0)
printf("MANIFEST HAS EXPIRED\n");
done:
if (ERR_peek_error())
ERR_print_errors_fp(stderr);
BIO_free(b);
CMS_ContentInfo_free(cms);
return m;
}
/*
* Main program.
*/
int main (int argc, char *argv[])
{
Manifest *m;
OpenSSL_add_all_algorithms();
ERR_load_crypto_strings();
m = read_manifest(argv[1]);
return m == NULL;
}
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