1 files changed, 11 insertions, 0 deletions
diff --git a/src/hmac.h b/src/hmac.h
new file mode 100644
index 0000000..3c3e8e7
--- /dev/null
+++ b/src/hmac.h
@@ -0,0 +1,11 @@
+#ifndef TOTP_HMAC_H
+#define TOTP_HMAC_H
+
+#include <stddef.h>
+#include <stdint.h>
+
+void hmac_sha1(uint8_t *restrict,
+               const uint8_t *restrict, size_t,
+               const uint8_t *restrict, size_t);
+
+#endif /* !TOTP_HMAC_H */