randombit / botan / 4834822395

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0.0
/src/lib/mac/hmac/hmac.h
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/*
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* HMAC
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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_HMAC_H_










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#define BOTAN_HMAC_H_










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#include <botan/mac.h>










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#include <botan/hash.h>










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namespace Botan {










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/**










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* HMAC










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*/










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class HMAC final : public MessageAuthenticationCode




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   {










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   public:










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      void clear() override;










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      std::string name() const override;










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      std::unique_ptr<MessageAuthenticationCode> new_object() const override;










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      size_t output_length() const override;










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      Key_Length_Specification key_spec() const override;










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      bool has_keying_material() const override;










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      /**










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      * @param hash the hash to use for HMACing










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      */










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      explicit HMAC(std::unique_ptr<HashFunction> hash);










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      HMAC(const HMAC&) = delete;










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      HMAC& operator=(const HMAC&) = 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<HashFunction> m_hash;










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      secure_vector<uint8_t> m_ikey, m_okey;










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      size_t m_hash_output_length;










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      size_t m_hash_block_size;










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   };










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}










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#endif
























    

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