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Use mbedtls_xor in md

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Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
This commit is contained in:
Dave Rodgman 2022-11-22 16:54:54 +00:00
parent d22fb73e3e
commit 99a507ee55
1 changed files with 2 additions and 6 deletions
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8
library/md.c
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@ -633,7 +633,6 @@ int mbedtls_md_hmac_starts( mbedtls_md_context_t *ctx, const unsigned char *key,
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
unsigned char sum[MBEDTLS_MD_MAX_SIZE]; unsigned char sum[MBEDTLS_MD_MAX_SIZE];
unsigned char *ipad, *opad; unsigned char *ipad, *opad;
size_t i;
if( ctx == NULL || ctx->md_info == NULL || ctx->hmac_ctx == NULL ) if( ctx == NULL || ctx->md_info == NULL || ctx->hmac_ctx == NULL )
return( MBEDTLS_ERR_MD_BAD_INPUT_DATA ); return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
@ -657,11 +656,8 @@ int mbedtls_md_hmac_starts( mbedtls_md_context_t *ctx, const unsigned char *key,
memset( ipad, 0x36, ctx->md_info->block_size ); memset( ipad, 0x36, ctx->md_info->block_size );
memset( opad, 0x5C, ctx->md_info->block_size ); memset( opad, 0x5C, ctx->md_info->block_size );
for( i = 0; i < keylen; i++ ) mbedtls_xor( ipad, ipad, key, keylen );
{ mbedtls_xor( opad, opad, key, keylen );
ipad[i] = (unsigned char)( ipad[i] ^ key[i] );
opad[i] = (unsigned char)( opad[i] ^ key[i] );
}
if( ( ret = mbedtls_md_starts( ctx ) ) != 0 ) if( ( ret = mbedtls_md_starts( ctx ) ) != 0 )
goto cleanup; goto cleanup;