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-rw-r--r--crypto/sha1.c23
1 files changed, 12 insertions, 11 deletions
diff --git a/crypto/sha1.c b/crypto/sha1.c
index 292dcc13ff9..7b1abca2936 100644
--- a/crypto/sha1.c
+++ b/crypto/sha1.c
@@ -49,32 +49,33 @@ static void sha1_init(void *ctx)
static void sha1_update(void *ctx, const u8 *data, unsigned int len)
{
struct sha1_ctx *sctx = ctx;
- unsigned int i, j;
+ unsigned int partial, done;
const u8 *src;
- j = (sctx->count >> 3) & 0x3f;
+ partial = (sctx->count >> 3) & 0x3f;
sctx->count += len << 3;
- i = 0;
+ done = 0;
src = data;
- if ((j + len) > 63) {
+ if ((partial + len) > 63) {
u32 temp[SHA_WORKSPACE_WORDS];
- if (j) {
- memcpy(&sctx->buffer[j], data, (i = 64-j));
+ if (partial) {
+ done = 64 - partial;
+ memcpy(sctx->buffer + partial, data, done);
src = sctx->buffer;
}
do {
sha_transform(sctx->state, src, temp);
- i += 64;
- src = &data[i];
- } while (i + 63 < len);
+ done += 64;
+ src = data + done;
+ } while (done + 63 < len);
memset(temp, 0, sizeof(temp));
- j = 0;
+ partial = 0;
}
- memcpy(&sctx->buffer[j], src, len - i);
+ memcpy(sctx->buffer + partial, src, len - done);
}