/*
* Verify a signature with options
*/
int pk_verify_ext( pk_type_t type, const void *options,
pk_context *ctx, md_type_t md_alg,
const unsigned char *hash, size_t hash_len,
const unsigned char *sig, size_t sig_len )
{
if( ctx == NULL || ctx->pk_info == NULL )
return( POLARSSL_ERR_PK_BAD_INPUT_DATA );
if( ! pk_can_do( ctx, type ) )
return( POLARSSL_ERR_PK_TYPE_MISMATCH );
if( type == POLARSSL_PK_RSASSA_PSS )
{
#if defined(POLARSSL_RSA_C) && defined(POLARSSL_PKCS1_V21)
int ret;
const pk_rsassa_pss_options *pss_opts;
if( options == NULL )
return( POLARSSL_ERR_PK_BAD_INPUT_DATA );
pss_opts = (const pk_rsassa_pss_options *) options;
if( sig_len < pk_get_len( ctx ) )
return( POLARSSL_ERR_RSA_VERIFY_FAILED );
ret = rsa_rsassa_pss_verify_ext( pk_rsa( *ctx ),
NULL, NULL, RSA_PUBLIC,
md_alg, hash_len, hash,
pss_opts->mgf1_hash_id,
pss_opts->expected_salt_len,
sig );
if( ret != 0 )
return( ret );
if( sig_len > pk_get_len( ctx ) )
return( POLARSSL_ERR_PK_SIG_LEN_MISMATCH );
return( 0 );
#else
return( POLARSSL_ERR_PK_FEATURE_UNAVAILABLE );
#endif
}
/* General case: no options */
if( options != NULL )
return( POLARSSL_ERR_PK_BAD_INPUT_DATA );
return( pk_verify( ctx, md_alg, hash, hash_len, sig, sig_len ) );
}
/*
* Simplified PKCS#1 v2.1 RSASSA-PSS-VERIFY function
*/
int rsa_rsassa_pss_verify( rsa_context *ctx,
int (*f_rng)(void *, unsigned char *, size_t),
void *p_rng,
int mode,
md_type_t md_alg,
unsigned int hashlen,
const unsigned char *hash,
const unsigned char *sig )
{
md_type_t mgf1_hash_id = ( ctx->hash_id != POLARSSL_MD_NONE )
? (md_type_t) ctx->hash_id
: md_alg;
return( rsa_rsassa_pss_verify_ext( ctx, f_rng, p_rng, mode,
md_alg, hashlen, hash,
mgf1_hash_id, RSA_SALT_LEN_ANY,
sig ) );
}
