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Minor improvements

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This commit is contained in:
Hanno Becker 2017-09-27 17:09:00 +01:00
parent 2b2f898cbd
commit e58d38c66f
1 changed files with 8 additions and 8 deletions
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16
library/rsa.c
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@ -1167,26 +1167,26 @@ int mbedtls_rsa_rsassa_pss_sign( mbedtls_rsa_context *ctx,
*
* Parameters:
* - md_alg: Identifies the hash algorithm used to generate the given hash;
* MBEDTLS_MD_NONE if raw data are signed.
* MBEDTLS_MD_NONE if raw data is signed.
* - hashlen: Length of hash in case hashlen is MBEDTLS_MD_NONE.
* - hash: Buffer containing the hashed message.
* - sig_len: Length of the encoded message.
* - hash: Buffer containing the hashed message or the raw data.
* - dst_len: Length of the encoded message.
* - dst: Buffer to hold the encoded message.
*
* Assumptions:
* - hash has size hashlen if md_alg == MBEDTLS_MD_NONE.
* - hash has size corresponding to md_alg if md_alg != MBEDTLS_MD_NONE.
* - dst points to a buffer of size at least sig_len.
* - dst points to a buffer of size at least dst_len.
*
*/
static int rsa_rsassa_pkcs1_v15_encode( mbedtls_md_type_t md_alg,
unsigned int hashlen,
const unsigned char *hash,
size_t sig_len,
size_t dst_len,
unsigned char *dst )
{
size_t oid_size = 0;
size_t nb_pad = sig_len;
size_t nb_pad = dst_len;
unsigned char *p = dst;
const char *oid = NULL;
@ -1282,9 +1282,9 @@ static int rsa_rsassa_pkcs1_v15_encode( mbedtls_md_type_t md_alg,
/* Just a sanity-check, should be automatic
* after the initial bounds check. */
if( p != dst + sig_len )
if( p != dst + dst_len )
{
mbedtls_zeroize( dst, sig_len );
mbedtls_zeroize( dst, dst_len );
return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
}