Add crypto sources for future use.add/crypto

 * the goal is to support AES-CBC-HMAC-SHA as AEAD cipher

Signed-off-by: Toni Uhlig <matzeton@googlemail.com>

1 files changed, 22 insertions, 0 deletions

diff --git a/crypto/hmac.h b/crypto/hmac.h
new file mode 100644
index 0000000..2c2d437
--- /dev/null
+++ b/crypto/hmac.h
@@ -0,0 +1,22 @@
+#ifndef __HMAC_H__
+#define __HMAC_H__
+
+#include <stdint.h>
+#include "sha1.h"
+
+#define HMAC_SHA1_HASH_SIZE 20
+
+/***********************************************************************'
+ * HMAC(K,m)      : HMAC SHA1
+ * @param key     : secret key
+ * @param keysize : key-length ín bytes
+ * @param msg     : msg to calculate HMAC over
+ * @param msgsize : msg-length in bytes
+ * @param output  : writeable buffer with at least 20 bytes available
+ */
+void hmac_sha1(const uint8_t* key, const uint32_t keysize, const uint8_t* msg, const uint32_t msgsize, uint8_t* output);
+
+
+#endif /* __HMAC_H__ */
+
+