cheng/libsodium
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Reindent

Browse Source
This commit is contained in:
Frank Denis 2013-04-26 22:19:24 -07:00
parent 77d96e79b7
commit 6ec9828b9f
1 changed files with 88 additions and 100 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

52
src/libsodium/crypto_stream/aes256estream/hongjun/aes256-ctr.c
View File

@ -13,22 +13,15 @@
/* ------------------------------------------------------------------------- */
/* key setup for AES-256*/
static void ECRYPT_keysetup(
ECRYPT_ctx* ctx,
const u8* key,
u32 keysize,
u32 ivsize)
static void
ECRYPT_keysetup(ECRYPT_ctx* ctx, const u8* key, u32 keysize, u32 ivsize)
{
unsigned int w[Nk*(Nr+1)], temp;
int i, j;
(void) sizeof(char[sizeof *ctx == crypto_stream_BEFORENMBYTES ? 1 : -1]);
i = 0;
for( i = 0; i < Nk; i++ )
{
for( i = 0; i < Nk; i++ ) {
w[i] = key[(i << 2)];
w[i] |= key[(i << 2)+1] << 8;
w[i] |= key[(i << 2)+2] << 16;
@ -37,8 +30,7 @@ static void ECRYPT_keysetup(
i = Nk;
while( i < Nb*(Nr+1) )
{
while( i < Nb*(Nr+1) ) {
temp = w[i-1];
temp = Sbox[ temp & 0xFF] << 24 ^
@ -82,19 +74,17 @@ static void ECRYPT_keysetup(
i++;
}
for (i = 0; i <= Nr; i++)
for (j = 0; j < Nb; j++)
for (i = 0; i <= Nr; i++) {
for (j = 0; j < Nb; j++) {
ctx->round_key[i][j] = w[(i<<2)+j];
}
}
}
/* ------------------------------------------------------------------------- */
static void ECRYPT_ivsetup(
ECRYPT_ctx* ctx,
const u8* iv)
static void
ECRYPT_ivsetup(ECRYPT_ctx* ctx, const u8* iv)
{
(void) sizeof(char[(sizeof ctx->counter) == crypto_stream_NONCEBYTES ? 1 : -1]);
memcpy(ctx->counter, iv, crypto_stream_NONCEBYTES);
@ -102,20 +92,17 @@ static void ECRYPT_ivsetup(
/* ------------------------------------------------------------------------- */
static void ECRYPT_process_bytes(
int action,
ECRYPT_ctx* ctx,
const u8* input,
u8* output,
static void
ECRYPT_process_bytes(int action, ECRYPT_ctx* ctx, const u8* input, u8* output,
u32 msglen)
{
u8 keystream[16];
u32 i;
memset(keystream, 0, sizeof keystream);
partial_precompute_tworounds(ctx);
for ( ; msglen >= 16; msglen -= 16, input += 16, output += 16)
{
for ( ; msglen >= 16; msglen -= 16, input += 16, output += 16) {
aes256_enc_block(ctx->counter, keystream, ctx);
((u32*)output)[0] = ((u32*)input)[0] ^ ((u32*)keystream)[0] ^ ctx->round_key[Nr][0];
@ -125,22 +112,23 @@ static void ECRYPT_process_bytes(
ctx->counter[0]++;
if ((ctx->counter[0] & 0xff)== 0) partial_precompute_tworounds(ctx);
if ((ctx->counter[0] & 0xff)== 0) {
partial_precompute_tworounds(ctx);
}
}
if (msglen > 0)
{
if (msglen > 0) {
aes256_enc_block(ctx->counter, keystream, ctx);
((u32*)keystream)[0] ^= ctx->round_key[Nr][0];
((u32*)keystream)[1] ^= ctx->round_key[Nr][1];
((u32*)keystream)[2] ^= ctx->round_key[Nr][2];
((u32*)keystream)[3] ^= ctx->round_key[Nr][3];
for (i = 0; i < msglen; i ++)
for (i = 0; i < msglen; i ++) {
output[i] = input[i] ^ keystream[i];
}
}
}
/* ------------------------------------------------------------------------- */