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Optionally allow parameters in x509_get_tag()

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This commit is contained in:
Manuel Pégourié-Gonnard 2013-07-01 15:27:48 +02:00
parent 1bc6931f8c
commit 444b42710a
1 changed files with 32 additions and 8 deletions
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40
library/x509parse.c
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@ -164,16 +164,40 @@ static int x509_get_serial( unsigned char **p,
* AlgorithmIdentifier ::= SEQUENCE {
* algorithm OBJECT IDENTIFIER,
* parameters ANY DEFINED BY algorithm OPTIONAL }
*
* If params_end is NULL, then parameters must be absent or ANS.1 NULL
*/
static int x509_get_alg( unsigned char **p,
const unsigned char *end,
x509_buf *alg )
x509_buf *alg, const unsigned char **params_end )
{
int ret;
size_t len;
if( ( ret = asn1_get_alg_null( p, end, alg ) ) != 0 )
if( params_end == NULL ) {
if( ( ret = asn1_get_alg_null( p, end, alg ) ) != 0 )
return( POLARSSL_ERR_X509_CERT_INVALID_ALG + ret );
return( 0 );
}
/* TODO: use asn1_get_alg */
if( ( ret = asn1_get_tag( p, end, &len,
ASN1_CONSTRUCTED | ASN1_SEQUENCE ) ) != 0 )
{
return( POLARSSL_ERR_X509_CERT_INVALID_ALG + ret );
}
end = *p + len;
alg->tag = **p;
if( ( ret = asn1_get_tag( p, end, &alg->len, ASN1_OID ) ) != 0 )
return( POLARSSL_ERR_X509_CERT_INVALID_ALG + ret );
alg->p = *p;
*p += alg->len;
*params_end = end;
return( 0 );
}
@ -1146,9 +1170,9 @@ static int x509parse_crt_der_core( x509_cert *crt, const unsigned char *buf,
*
* signature AlgorithmIdentifier
*/
if( ( ret = x509_get_version( &p, end, &crt->version ) ) != 0 ||
( ret = x509_get_serial( &p, end, &crt->serial ) ) != 0 ||
( ret = x509_get_alg( &p, end, &crt->sig_oid1 ) ) != 0 )
if( ( ret = x509_get_version( &p, end, &crt->version ) ) != 0 ||
( ret = x509_get_serial( &p, end, &crt->serial ) ) != 0 ||
( ret = x509_get_alg( &p, end, &crt->sig_oid1, NULL ) ) != 0 )
{
x509_free( crt );
return( ret );
@ -1300,7 +1324,7 @@ static int x509parse_crt_der_core( x509_cert *crt, const unsigned char *buf,
* signatureAlgorithm AlgorithmIdentifier,
* signatureValue BIT STRING
*/
if( ( ret = x509_get_alg( &p, end, &crt->sig_oid2 ) ) != 0 )
if( ( ret = x509_get_alg( &p, end, &crt->sig_oid2, NULL ) ) != 0 )
{
x509_free( crt );
return( ret );
@ -1623,7 +1647,7 @@ int x509parse_crl( x509_crl *chain, const unsigned char *buf, size_t buflen )
* signature AlgorithmIdentifier
*/
if( ( ret = x509_crl_get_version( &p, end, &crl->version ) ) != 0 ||
( ret = x509_get_alg( &p, end, &crl->sig_oid1 ) ) != 0 )
( ret = x509_get_alg( &p, end, &crl->sig_oid1, NULL ) ) != 0 )
{
x509_crl_free( crl );
return( ret );
@ -1728,7 +1752,7 @@ int x509parse_crl( x509_crl *chain, const unsigned char *buf, size_t buflen )
* signatureAlgorithm AlgorithmIdentifier,
* signatureValue BIT STRING
*/
if( ( ret = x509_get_alg( &p, end, &crl->sig_oid2 ) ) != 0 )
if( ( ret = x509_get_alg( &p, end, &crl->sig_oid2, NULL ) ) != 0 )
{
x509_crl_free( crl );
return( ret );