mirror/mbedtls
1
0
Fork 0
mirror of https://github.com/Mbed-TLS/mbedtls.git synced 2025-03-29 13:20:21 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

Consume input in 8-byte chunks

Browse Source 
Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
This commit is contained in:
Dave Rodgman 2023-05-29 22:04:18 +01:00 committed by Dave Rodgman
parent 2d8076978a
commit bcfd79c699
1 changed files with 28 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

28
library/sha3.c
View File

@ -70,6 +70,8 @@ static const uint8_t pi[24] = {
#define ROT64(x, y) (((x) << (y)) | ((x) >> (64U - (y))))
#define ABSORB(ctx, idx, v) do { ctx->state[(idx) >> 3] ^= ((uint64_t) (v)) << (((idx) & 0x7) << 3); \
} while (0)
#define ABSORB8(ctx, idx, v) do { ctx->state[(idx) >> 3] ^= ((uint64_t) (v)) << ((idx) << 3); \
} while (0)
#define SQUEEZE(ctx, idx) ((uint8_t) (ctx->state[(idx) >> 3] >> (((idx) & 0x7) << 3)))
#define SWAP(x, y) do { uint64_t tmp = (x); (x) = (y); (y) = tmp; } while (0)
@ -232,6 +234,32 @@ int mbedtls_sha3_update(mbedtls_sha3_context *ctx,
return 0;
}
if (ilen >= 8) {
// 8-byte align index
int align_bytes = 8 - (ctx->index % 8);
if (align_bytes) {
for (; align_bytes > 0; align_bytes--) {
ABSORB(ctx, ctx->index, *input++);
ilen--;
ctx->index++;
}
if ((ctx->index = ctx->index % ctx->max_block_size) == 0) {
keccak_f1600(ctx);
}
}
// process input in 8-byte chunks
while (ilen >= 8) {
ABSORB8(ctx, ctx->index, mbedtls_get_unaligned_uint64(input));
input += 8;
ilen -= 8;
if ((ctx->index = (ctx->index + 8) % ctx->max_block_size) == 0) {
keccak_f1600(ctx);
}
}
}
// handle remaining bytes
while (ilen-- > 0) {
ABSORB(ctx, ctx->index, *input++);
if ((ctx->index = (ctx->index + 1) % ctx->max_block_size) == 0) {