diff options
| -rw-r--r-- | crypto/sha1.c | 25 |
1 files changed, 17 insertions, 8 deletions
diff --git a/crypto/sha1.c b/crypto/sha1.c index c686e7826174..292dcc13ff92 100644 --- a/crypto/sha1.c +++ b/crypto/sha1.c @@ -50,22 +50,31 @@ static void sha1_update(void *ctx, const u8 *data, unsigned int len) { struct sha1_ctx *sctx = ctx; unsigned int i, j; - u32 temp[SHA_WORKSPACE_WORDS]; + const u8 *src; j = (sctx->count >> 3) & 0x3f; sctx->count += len << 3; + i = 0; + src = data; if ((j + len) > 63) { - memcpy(&sctx->buffer[j], data, (i = 64-j)); - sha_transform(sctx->state, sctx->buffer, temp); - for ( ; i + 63 < len; i += 64) { - sha_transform(sctx->state, &data[i], temp); + u32 temp[SHA_WORKSPACE_WORDS]; + + if (j) { + memcpy(&sctx->buffer[j], data, (i = 64-j)); + src = sctx->buffer; } + + do { + sha_transform(sctx->state, src, temp); + i += 64; + src = &data[i]; + } while (i + 63 < len); + + memset(temp, 0, sizeof(temp)); j = 0; } - else i = 0; - memset(temp, 0, sizeof(temp)); - memcpy(&sctx->buffer[j], &data[i], len - i); + memcpy(&sctx->buffer[j], src, len - i); } |