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pk_{sign,verify}() now accept hash_len = 0

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This commit is contained in:
Manuel Pégourié-Gonnard
2013-08-22 14:55:30 +02:00
parent a20c58c6f1
commit bfe32efb9b
4 changed files with 48 additions and 45 deletions
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23
library/pk.c
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@ -149,6 +149,23 @@ int pk_can_do( pk_context *ctx, pk_type_t type )
return( ctx->pk_info->can_do( type ) );
}
/*
* Helper for pk_sign and pk_verify
*/
static inline int pk_hashlen_helper( md_type_t md_alg, size_t *hash_len )
{
const md_info_t *md_info;
if( *hash_len != 0 )
return( 0 );
if( ( md_info = md_info_from_type( md_alg ) ) == NULL )
return( -1 );
*hash_len = md_info->size;
return( 0 );
}
/*
* Verify a signature
*/
@ -156,7 +173,8 @@ int pk_verify( 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 )
if( ctx == NULL || ctx->pk_info == NULL ||
pk_hashlen_helper( md_alg, &hash_len ) != 0 )
return( POLARSSL_ERR_PK_BAD_INPUT_DATA );
if( ctx->pk_info->verify_func == NULL )
@ -174,7 +192,8 @@ int pk_sign( pk_context *ctx, md_type_t md_alg,
unsigned char *sig, size_t *sig_len,
int (*f_rng)(void *, unsigned char *, size_t), void *p_rng )
{
if( ctx == NULL || ctx->pk_info == NULL )
if( ctx == NULL || ctx->pk_info == NULL ||
pk_hashlen_helper( md_alg, &hash_len ) != 0 )
return( POLARSSL_ERR_PK_BAD_INPUT_DATA );
if( ctx->pk_info->sign_func == NULL )