* added key derivation functions

1 files changed, 30 insertions, 0 deletions

diff --git a/authAlgo.cpp b/authAlgo.cpp
index 57c9ee6..206d335 100644
--- a/authAlgo.cpp
+++ b/authAlgo.cpp
@@ -30,7 +30,37 @@
 
 #include "authAlgo.h"
 
+extern "C" {
+#include <srtp/crypto_kernel.h>
+}
+
+
 auth_tag_t NullAuthAlgo::calc(const Buffer& buf)
 {
   return 0;
 }
+
+
+// HMAC_SHA1
+auth_tag_t HmacAuthAlgo::calc(const Buffer& buf)
+{
+  extern auth_type_t hmac;
+  err_status_t status = err_status_ok;
+  auth_t *auth = NULL;
+
+  uint8_t key[] = {
+    0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
+    0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
+    0x10, 0x11, 0x12, 0x13
+  };
+
+  // auth_type_alloc(auth_type, auth, key_len, out_len)
+  status = auth_type_alloc(&hmac, &auth, 94, 4);
+  status = auth_init(auth, key);
+
+  status = auth_dealloc(auth);
+
+  return 0;
+}
+
+