Coverage Report

Created: 2020-06-30 13:58

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