ARMmbed
/
mbed-os
mirror of https://github.com/ARMmbed/mbed-os.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity

[NUC472/M487] Optimize AES alter. code

pull/4925/head
ccli8 2017-09-26 17:32:52 +08:00
parent 6cc3aa3e54
commit 7076675fec
2 changed files with 40 additions and 26 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

33
features/mbedtls/targets/TARGET_NUVOTON/TARGET_M480/aes/aes_alt.c
View File

@ -255,7 +255,6 @@ int mbedtls_aes_crypt_cbc( mbedtls_aes_context *ctx,
const unsigned char *input,
unsigned char *output )
{
unsigned char temp[16];
int length = len;
int blockChainLen;
@ -263,31 +262,39 @@ int mbedtls_aes_crypt_cbc( mbedtls_aes_context *ctx,
return( MBEDTLS_ERR_AES_INVALID_INPUT_LENGTH );
ctx->opMode = AES_MODE_CBC;
/* Fetch IV byte data in big-endian */
ctx->iv[0] = nu_get32_be(iv);
ctx->iv[1] = nu_get32_be(iv + 4);
ctx->iv[2] = nu_get32_be(iv + 8);
ctx->iv[3] = nu_get32_be(iv + 12);
if( mode == MBEDTLS_AES_ENCRYPT ) {
ctx->encDec = 1;
}
else {
ctx->encDec = 0;
}
while( length > 0 ) {
blockChainLen = (length > MAX_DMA_CHAIN_SIZE) ? MAX_DMA_CHAIN_SIZE : length;
ctx->opMode = AES_MODE_CBC;
/* Fetch IV byte data in big-endian */
ctx->iv[0] = nu_get32_be(iv);
ctx->iv[1] = nu_get32_be(iv + 4);
ctx->iv[2] = nu_get32_be(iv + 8);
ctx->iv[3] = nu_get32_be(iv + 12);
if( mode == MBEDTLS_AES_ENCRYPT ) {
ctx->encDec = 1;
__nvt_aes_crypt(ctx, input, output, blockChainLen);
memcpy( iv, output+blockChainLen-16, 16 );
} else {
memcpy( temp, input+blockChainLen-16, 16 );
ctx->encDec = 0;
__nvt_aes_crypt(ctx, input, output, blockChainLen);
memcpy( iv, temp, 16 );
}
length -= blockChainLen;
input += blockChainLen;
output += blockChainLen;
}
/* Save IV for next block cipher */
nu_set32_be(iv, ctx->iv[0]);
nu_set32_be(iv + 4, ctx->iv[1]);
nu_set32_be(iv + 8, ctx->iv[2]);
nu_set32_be(iv + 12, ctx->iv[3]);
return( 0 );
}
#endif /* MBEDTLS_CIPHER_MODE_CBC */

33
features/mbedtls/targets/TARGET_NUVOTON/TARGET_NUC472/aes/aes_alt.c
View File

@ -255,7 +255,6 @@ int mbedtls_aes_crypt_cbc( mbedtls_aes_context *ctx,
const unsigned char *input,
unsigned char *output )
{
unsigned char temp[16];
int length = len;
int blockChainLen;
@ -263,31 +262,39 @@ int mbedtls_aes_crypt_cbc( mbedtls_aes_context *ctx,
return( MBEDTLS_ERR_AES_INVALID_INPUT_LENGTH );
ctx->opMode = AES_MODE_CBC;
/* Fetch IV byte data in big-endian */
ctx->iv[0] = nu_get32_be(iv);
ctx->iv[1] = nu_get32_be(iv + 4);
ctx->iv[2] = nu_get32_be(iv + 8);
ctx->iv[3] = nu_get32_be(iv + 12);
if( mode == MBEDTLS_AES_ENCRYPT ) {
ctx->encDec = 1;
}
else {
ctx->encDec = 0;
}
while( length > 0 ) {
blockChainLen = (length > MAX_DMA_CHAIN_SIZE) ? MAX_DMA_CHAIN_SIZE : length;
ctx->opMode = AES_MODE_CBC;
/* Fetch IV byte data in big-endian */
ctx->iv[0] = nu_get32_be(iv);
ctx->iv[1] = nu_get32_be(iv + 4);
ctx->iv[2] = nu_get32_be(iv + 8);
ctx->iv[3] = nu_get32_be(iv + 12);
if( mode == MBEDTLS_AES_ENCRYPT ) {
ctx->encDec = 1;
__nvt_aes_crypt(ctx, input, output, blockChainLen);
memcpy( iv, output+blockChainLen-16, 16 );
} else {
memcpy( temp, input+blockChainLen-16, 16 );
ctx->encDec = 0;
__nvt_aes_crypt(ctx, input, output, blockChainLen);
memcpy( iv, temp, 16 );
}
length -= blockChainLen;
input += blockChainLen;
output += blockChainLen;
}
/* Save IV for next block cipher */
nu_set32_be(iv, ctx->iv[0]);
nu_set32_be(iv + 4, ctx->iv[1]);
nu_set32_be(iv + 8, ctx->iv[2]);
nu_set32_be(iv + 12, ctx->iv[3]);
return( 0 );
}
#endif /* MBEDTLS_CIPHER_MODE_CBC */