Minor improvement and man pages for HMAC

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

1 files changed, 15 insertions, 0 deletions

diff --git a/hmac_state_output_size.c b/hmac_state_output_size.c
new file mode 100644
index 0000000..d1a94dd
--- /dev/null
+++ b/hmac_state_output_size.c
@@ -0,0 +1,15 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+
+
+/**
+ * Get the output size of the algorithm specified for a HMAC state
+ * 
+ * @param   state  The state
+ * @return         The number of bytes in the output, zero on error
+ */
+size_t
+libsha2_hmac_state_output_size(const struct libsha2_hmac_state *restrict state)
+{
+	return libsha2_algorithm_output_size(state->sha2_state.algorithm);
+}