1 files changed, 13 insertions, 0 deletions
diff --git a/libblake_blake2s_digest_get_required_input_size.c b/libblake_blake2s_digest_get_required_input_size.c
new file mode 100644
index 0000000..c356822
--- /dev/null
+++ b/libblake_blake2s_digest_get_required_input_size.c
@@ -0,0 +1,13 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+
+size_t
+libblake_blake2s_digest_get_required_input_size(size_t len)
+{
+	size_t blocks, rem;
+	blocks = len >> 6;
+	rem = len & 63;
+	if (rem)
+		blocks += 1;
+	return blocks << 6;
+}