1 files changed, 67 insertions, 0 deletions
diff --git a/comm/third_party/botan/src/lib/mac/cmac/cmac.h b/comm/third_party/botan/src/lib/mac/cmac/cmac.h
new file mode 100644
index 0000000000..f73167590d
--- /dev/null
+++ b/comm/third_party/botan/src/lib/mac/cmac/cmac.h
@@ -0,0 +1,67 @@
+/*
+* CMAC
+* (C) 1999-2007,2014 Jack Lloyd
+*
+* Botan is released under the Simplified BSD License (see license.txt)
+*/
+
+#ifndef BOTAN_CMAC_H_
+#define BOTAN_CMAC_H_
+
+#include <botan/mac.h>
+#include <botan/block_cipher.h>
+
+BOTAN_FUTURE_INTERNAL_HEADER(cmac.h)
+
+namespace Botan {
+
+/**
+* CMAC, also known as OMAC1
+*/
+class BOTAN_PUBLIC_API(2,0) CMAC final : public MessageAuthenticationCode
+   {
+   public:
+      std::string name() const override;
+      size_t output_length() const override { return m_block_size; }
+      MessageAuthenticationCode* clone() const override;
+
+      void clear() override;
+
+      Key_Length_Specification key_spec() const override
+         {
+         return m_cipher->key_spec();
+         }
+
+      /**
+      * CMAC's polynomial doubling operation
+      *
+      * This function was only exposed for use elsewhere in the library, but it is not
+      * longer used. This function will be removed in a future release.
+      *
+      * @param in the input
+      */
+      static secure_vector<uint8_t>
+         BOTAN_DEPRECATED("This was only for internal use and is no longer used")
+         poly_double(const secure_vector<uint8_t>& in);
+
+      /**
+      * @param cipher the block cipher to use
+      */
+      explicit CMAC(BlockCipher* cipher);
+
+      CMAC(const CMAC&) = delete;
+      CMAC& operator=(const CMAC&) = delete;
+   private:
+      void add_data(const uint8_t[], size_t) override;
+      void final_result(uint8_t[]) override;
+      void key_schedule(const uint8_t[], size_t) override;
+
+      std::unique_ptr<BlockCipher> m_cipher;
+      secure_vector<uint8_t> m_buffer, m_state, m_B, m_P;
+      const size_t m_block_size;
+      size_t m_position;
+   };
+
+}
+
+#endif