Fix libsha2_digest + minor improvements

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

1 files changed, 12 insertions, 0 deletions

diff --git a/common.h b/common.h
index 746cf36..e6e15d5 100644
--- a/common.h
+++ b/common.h
@@ -7,3 +7,15 @@
 #include <stddef.h>
 #include <string.h>
 #include <unistd.h>
+
+
+/**
+ * Process a chunk using SHA-2
+ * 
+ * @param  state  The hashing state
+ * @param  chunk  The data to process
+ */
+#if defined(__GNUC__)
+__attribute__((__nonnull__, __nothrow__))
+#endif
+void libsha2_process(struct libsha2_state *restrict, const unsigned char *restrict);