Use SHA extensions1.1

Signed-off-by: Mattias Andrée <maandree@kth.se>

1 files changed, 5 insertions, 9 deletions

diff --git a/update.c b/update.c
index 4cf31a5..3c46f28 100644
--- a/update.c
+++ b/update.c
@@ -16,17 +16,13 @@ libsha2_update(struct libsha2_state *restrict state, const void *restrict messag
 		n = msglen < state->chunk_size - off ? msglen : state->chunk_size - off;
 		memcpy(&state->chunk[off], message, n);
 		if (off + n == state->chunk_size)
-			libsha2_process(state, state->chunk);
-		message += n;
+			libsha2_process(state, state->chunk, state->chunk_size);
+		message = &message[n];
 		msglen -= n;
 	}
 
-	while (msglen >= state->chunk_size) {
-		libsha2_process(state, (const unsigned char *)message);
-		message += state->chunk_size;
-		msglen -= state->chunk_size;
-	}
+	off = libsha2_process(state, (const unsigned char *)message, msglen);
 
-	if (msglen)
-		memcpy(state->chunk, message, msglen);
+	if (msglen > off)
+		memcpy(state->chunk, &message[off], msglen - off);
 }