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Use mbedtls_xor in DES

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Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
This commit is contained in:
Dave Rodgman
2022-11-22 16:43:29 +00:00
parent ffb5499988
commit 2e9db8e9bf
1 changed files with 4 additions and 10 deletions
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14
library/des.c
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@@ -635,7 +635,6 @@ int mbedtls_des_crypt_cbc( mbedtls_des_context *ctx,
const unsigned char *input,
unsigned char *output )
{
int i;
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
unsigned char temp[8];
@@ -646,8 +645,7 @@ int mbedtls_des_crypt_cbc( mbedtls_des_context *ctx,
{
while( length > 0 )
{
for( i = 0; i < 8; i++ )
output[i] = (unsigned char)( input[i] ^ iv[i] );
mbedtls_xor( output, input, iv, 8 );
ret = mbedtls_des_crypt_ecb( ctx, output, output );
if( ret != 0 )
@@ -668,8 +666,7 @@ int mbedtls_des_crypt_cbc( mbedtls_des_context *ctx,
if( ret != 0 )
goto exit;
for( i = 0; i < 8; i++ )
output[i] = (unsigned char)( output[i] ^ iv[i] );
mbedtls_xor( output, output, iv, 8 );
memcpy( iv, temp, 8 );
@@ -741,7 +738,6 @@ int mbedtls_des3_crypt_cbc( mbedtls_des3_context *ctx,
const unsigned char *input,
unsigned char *output )
{
int i;
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
unsigned char temp[8];
@@ -752,8 +748,7 @@ int mbedtls_des3_crypt_cbc( mbedtls_des3_context *ctx,
{
while( length > 0 )
{
for( i = 0; i < 8; i++ )
output[i] = (unsigned char)( input[i] ^ iv[i] );
mbedtls_xor( output, input, iv, 8 );
ret = mbedtls_des3_crypt_ecb( ctx, output, output );
if( ret != 0 )
@@ -774,8 +769,7 @@ int mbedtls_des3_crypt_cbc( mbedtls_des3_context *ctx,
if( ret != 0 )
goto exit;
for( i = 0; i < 8; i++ )
output[i] = (unsigned char)( output[i] ^ iv[i] );
mbedtls_xor( output, output, iv, 8 );
memcpy( iv, temp, 8 );