Nick Child 2022-09-14 14:51:23 -05:00
parent 34d5e931cf
commit 8ce1b1afc8
3 changed files with 18 additions and 19 deletions

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@ -22,23 +22,22 @@
*/ */
/** /**
* Note: For the time being, this application of the PKCS7 cryptographic * Note: For the time being, this implementation of the PKCS7 cryptographic
* message syntax is a partial implementation of RFC 2315. * message syntax is a partial implementation of RFC 2315.
* Differences include: * Differences include:
* - The RFC specifies 6 different content types. The only type currently * - The RFC specifies 6 different content types. The only type currently
* supported in Mbed TLS is the signed data content type. * supported in Mbed TLS is the signed data content type.
* - The only supported PKCS7 Signed Data syntax version is version 1 * - The only supported PKCS7 Signed Data syntax version is version 1
* - The RFC specifies support for BER. This application is limited to * - The RFC specifies support for BER. This implementation is limited to
* DER only. * DER only.
* - The RFC specifies that multiple digest algorithms can be specified * - The RFC specifies that multiple digest algorithms can be specified
* in the Signed Data type. Only one digest algorithm is supported in Mbed TLS. * in the Signed Data type. Only one digest algorithm is supported in Mbed TLS.
* - The RFC specifies the Signed Data certificate format can be * - The RFC specifies the Signed Data type can contain multiple X509 or PKCS6
* X509 or PKCS6. The only type currently supported in MbedTLS is X509. * certificates. In Mbed TLS, this list can only contain 0 or 1 certificates
* and they must be in X509 format.
* - The RFC specifies the Signed Data type can contain * - The RFC specifies the Signed Data type can contain
* certificate-revocation lists (crls). This application has no support * certificate-revocation lists (crls). This implementation has no support
* for crls so it is assumed to be an empty list. * for crls so it is assumed to be an empty list.
* - The RFC specifies support for multiple signers. This application only
* supports the Signed Data type with a single signer.
*/ */
#ifndef MBEDTLS_PKCS7_H #ifndef MBEDTLS_PKCS7_H

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@ -58,8 +58,7 @@
*/ */
void mbedtls_pkcs7_init( mbedtls_pkcs7 *pkcs7 ) void mbedtls_pkcs7_init( mbedtls_pkcs7 *pkcs7 )
{ {
memset( pkcs7, 0, sizeof( mbedtls_pkcs7 ) ); memset( pkcs7, 0, sizeof( *pkcs7 ) );
pkcs7->raw.p = NULL;
} }
static int pkcs7_get_next_content_len( unsigned char **p, unsigned char *end, static int pkcs7_get_next_content_len( unsigned char **p, unsigned char *end,
@ -702,7 +701,8 @@ out:
int mbedtls_pkcs7_signed_hash_verify( mbedtls_pkcs7 *pkcs7, int mbedtls_pkcs7_signed_hash_verify( mbedtls_pkcs7 *pkcs7,
const mbedtls_x509_crt *cert, const mbedtls_x509_crt *cert,
const unsigned char *hash, size_t hashlen) const unsigned char *hash,
size_t hashlen )
{ {
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
const mbedtls_md_info_t *md_info; const mbedtls_md_info_t *md_info;

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@ -84,7 +84,7 @@ void pkcs7_verify( char *pkcs7_file, char *crt, char *filetobesigned, int do_has
if( do_hash_alg ) if( do_hash_alg )
{ {
res = mbedtls_oid_get_md_alg( &(pkcs7.signed_data.digest_alg_identifiers), &md_alg ); res = mbedtls_oid_get_md_alg( &pkcs7.signed_data.digest_alg_identifiers, &md_alg );
TEST_ASSERT( res == 0 ); TEST_ASSERT( res == 0 );
TEST_ASSERT( md_alg == (mbedtls_md_type_t) do_hash_alg ); TEST_ASSERT( md_alg == (mbedtls_md_type_t) do_hash_alg );
md_info = mbedtls_md_info_from_type( md_alg ); md_info = mbedtls_md_info_from_type( md_alg );
@ -162,7 +162,7 @@ void pkcs7_verify_multiple_signers( char *pkcs7_file, char *crt1, char *crt2, ch
if( do_hash_alg ) if( do_hash_alg )
{ {
res = mbedtls_oid_get_md_alg( &(pkcs7.signed_data.digest_alg_identifiers), &md_alg ); res = mbedtls_oid_get_md_alg( &pkcs7.signed_data.digest_alg_identifiers, &md_alg );
TEST_ASSERT( res == 0 ); TEST_ASSERT( res == 0 );
TEST_ASSERT( md_alg == MBEDTLS_MD_SHA256 ); TEST_ASSERT( md_alg == MBEDTLS_MD_SHA256 );