Minor improvement and man pages for HMAC

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

1 files changed, 8 insertions, 12 deletions

diff --git a/hmac_digest.c b/hmac_digest.c
index caee756..9cc4271 100644
--- a/hmac_digest.c
+++ b/hmac_digest.c
@@ -10,28 +10,24 @@
  * `libsha2_hmac_update` and `libsha2_hmac_update`
  * can be called again
  * 
- * @param   state   The state of the algorithm
- * @param   data    Data to feed into the algorithm
- * @param   n       The number of bytes to feed into the algorithm
- * @param   output  The output buffer for the hash, it will be as
- *                  large as for the underlaying hash algorithm
- * @return          Zero on success, -1 on error
+ * @param  state   The state of the algorithm
+ * @param  data    Data to feed into the algorithm
+ * @param  n       The number of bytes to feed into the algorithm
+ * @param  output  The output buffer for the hash, it will be as
+ *                 large as for the underlaying hash algorithm
  */
-int
+void
 libsha2_hmac_digest(struct libsha2_hmac_state *restrict state, const void *data, size_t n, void *output)
 {
 	if (!state->inited) {
-		if (libsha2_init(&state->sha2_state, state->sha2_state.algorithm))
-			return -1;
+		libsha2_init(&state->sha2_state, state->sha2_state.algorithm);
 		libsha2_update(&state->sha2_state, state->ipad, state->sha2_state.chunk_size * 8);
 	}
 
 	libsha2_digest(&state->sha2_state, data, n, output);
-	if (libsha2_init(&state->sha2_state, state->sha2_state.algorithm))
-		return -1;
+	libsha2_init(&state->sha2_state, state->sha2_state.algorithm);
 
 	libsha2_update(&state->sha2_state, state->opad, state->sha2_state.chunk_size * 8);
 	libsha2_digest(&state->sha2_state, output, state->outsize, output);
 	state->inited = 0;
-	return 0;
 }