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- Small code rewrite

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This commit is contained in:
Paul Bakker 2012-04-18 14:16:09 +00:00
parent 7890405856
commit 369e14bbf1
3 changed files with 16 additions and 26 deletions
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11
library/aes.c
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@ -888,7 +888,7 @@ int aes_crypt_ctr( aes_context *ctx,
const unsigned char *input,
unsigned char *output )
{
int c, i, cb;
int c, i;
size_t n = *nc_off;
while( length-- )
@ -896,12 +896,9 @@ int aes_crypt_ctr( aes_context *ctx,
if( n == 0 ) {
aes_crypt_ecb( ctx, AES_ENCRYPT, nonce_counter, stream_block );
i = 15;
do {
nonce_counter[i]++;
cb = nonce_counter[i] == 0;
} while( i-- && cb );
for( i = 16; i > 0; i-- )
if( ++nonce_counter[i - 1] != 0 )
break;
}
c = *input++;
*output++ = (unsigned char)( c ^ stream_block[n] );

11
library/camellia.c
View file

@ -633,7 +633,7 @@ int camellia_crypt_ctr( camellia_context *ctx,
const unsigned char *input,
unsigned char *output )
{
int c, i, cb;
int c, i;
size_t n = *nc_off;
while( length-- )
@ -641,12 +641,9 @@ int camellia_crypt_ctr( camellia_context *ctx,
if( n == 0 ) {
camellia_crypt_ecb( ctx, CAMELLIA_ENCRYPT, nonce_counter, stream_block );
i = 15;
do {
nonce_counter[i]++;
cb = nonce_counter[i] == 0;
} while( i-- && cb );
for( i = 16; i > 0; i-- )
if( ++nonce_counter[i - 1] != 0 )
break;
}
c = *input++;
*output++ = (unsigned char)( c ^ stream_block[n] );

20
library/ctr_drbg.c
View file

@ -185,7 +185,7 @@ int ctr_drbg_update_internal( ctr_drbg_context *ctx,
{
unsigned char tmp[CTR_DRBG_SEEDLEN];
unsigned char *p = tmp;
int cb, i, j;
int i, j;
memset( tmp, 0, CTR_DRBG_SEEDLEN );
@ -194,11 +194,9 @@ int ctr_drbg_update_internal( ctr_drbg_context *ctx,
/*
* Increase counter
*/
i = CTR_DRBG_BLOCKSIZE - 1;
do {
ctx->counter[i]++;
cb = ctx->counter[i] == 0;
} while( i-- && cb );
for( i = CTR_DRBG_BLOCKSIZE; i >= 0; i-- )
if( ++ctx->counter[i - 1] != 0 )
break;
/*
* Crypt counter block
@ -286,7 +284,7 @@ int ctr_drbg_random_with_add( void *p_rng,
unsigned char add_input[CTR_DRBG_SEEDLEN];
unsigned char *p = output;
unsigned char tmp[CTR_DRBG_BLOCKSIZE];
int cb, i;
int i;
size_t use_len;
if( output_len > CTR_DRBG_MAX_REQUEST )
@ -317,11 +315,9 @@ int ctr_drbg_random_with_add( void *p_rng,
/*
* Increase counter
*/
i = CTR_DRBG_BLOCKSIZE - 1;
do {
ctx->counter[i]++;
cb = ctx->counter[i] == 0;
} while( i-- && cb );
for( i = CTR_DRBG_BLOCKSIZE; i > 0; i-- )
if( ++ctx->counter[i - 1] != 0 )
break;
/*
* Crypt counter block