1 files changed, 63 insertions, 0 deletions
diff --git a/src/lib/mac/cmac/cmac.h b/src/lib/mac/cmac/cmac.h
new file mode 100644
index 000000000..c1b75cfa5
--- /dev/null
+++ b/src/lib/mac/cmac/cmac.h
@@ -0,0 +1,63 @@
+/*
+* CMAC
+* (C) 1999-2007 Jack Lloyd
+*
+* Distributed under the terms of the Botan license
+*/
+
+#ifndef BOTAN_CMAC_H__
+#define BOTAN_CMAC_H__
+
+#include <botan/mac.h>
+#include <botan/block_cipher.h>
+
+namespace Botan {
+
+/**
+* CMAC, also known as OMAC1
+*/
+class BOTAN_DLL CMAC : public MessageAuthenticationCode
+   {
+   public:
+      std::string name() const;
+      size_t output_length() const { return e->block_size(); }
+      MessageAuthenticationCode* clone() const;
+
+      void clear();
+
+      Key_Length_Specification key_spec() const
+         {
+         return e->key_spec();
+         }
+
+      /**
+      * CMAC's polynomial doubling operation
+      * @param in the input
+      * @param polynomial the byte value of the polynomial
+      */
+      static secure_vector<byte> poly_double(const secure_vector<byte>& in,
+                                             byte polynomial);
+
+      /**
+      * @param cipher the underlying block cipher to use
+      */
+      CMAC(BlockCipher* cipher);
+
+      CMAC(const CMAC&) = delete;
+      CMAC& operator=(const CMAC&) = delete;
+
+      ~CMAC();
+   private:
+      void add_data(const byte[], size_t);
+      void final_result(byte[]);
+      void key_schedule(const byte[], size_t);
+
+      BlockCipher* e;
+      secure_vector<byte> buffer, state, B, P;
+      size_t position;
+      byte polynomial;
+   };
+
+}
+
+#endif