Coverage Report

Created: 2021-05-04 09:02

/src/botan/build/include/botan/internal/cascade.h
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/*
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* Block Cipher Cascade
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* (C) 2010 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_CASCADE_H_
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#define BOTAN_CASCADE_H_
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#include <botan/block_cipher.h>
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namespace Botan {
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/**
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* Block Cipher Cascade
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*/
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class Cascade_Cipher final : public BlockCipher
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   {
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   public:
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      void encrypt_n(const uint8_t in[], uint8_t out[], size_t blocks) const override;
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      void decrypt_n(const uint8_t in[], uint8_t out[], size_t blocks) const override;
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      size_t block_size() const override { return m_block_size; }
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      Key_Length_Specification key_spec() const override
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         {
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         return Key_Length_Specification(m_cipher1->maximum_keylength() +
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                                         m_cipher2->maximum_keylength());
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         }
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      void clear() override;
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      std::string name() const override;
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      std::unique_ptr<BlockCipher> new_object() const override;
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      /**
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      * Create a cascade of two block ciphers
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      * @param cipher1 the first cipher
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      * @param cipher2 the second cipher
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      */
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      Cascade_Cipher(std::unique_ptr<BlockCipher> cipher1,
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                     std::unique_ptr<BlockCipher> cipher2);
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      Cascade_Cipher(const Cascade_Cipher&) = delete;
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      Cascade_Cipher& operator=(const Cascade_Cipher&) = delete;
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   private:
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      void key_schedule(const uint8_t[], size_t) override;
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      std::unique_ptr<BlockCipher> m_cipher1, m_cipher2;
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      size_t m_block_size;
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   };
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}
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#endif