Coverage Report

Created: 2020-05-23 13:54

/src/botan/build/include/botan/rc4.h
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/*
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* RC4
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* (C) 1999-2008 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_RC4_H_
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#define BOTAN_RC4_H_
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#include <botan/stream_cipher.h>
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#include <botan/types.h>
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BOTAN_FUTURE_INTERNAL_HEADER(rc4.h)
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namespace Botan {
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/**
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* RC4 stream cipher
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*/
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class BOTAN_PUBLIC_API(2,0) RC4 final : public StreamCipher
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   {
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   public:
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      void cipher(const uint8_t in[], uint8_t out[], size_t length) override;
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      void set_iv(const uint8_t iv[], size_t iv_len) override;
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      void clear() override;
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      std::string name() const override;
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      StreamCipher* clone() const override;
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      Key_Length_Specification key_spec() const override;
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      /**
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      * @param skip skip this many initial bytes in the keystream
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      */
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      explicit RC4(size_t skip = 0);
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      ~RC4() { clear(); }
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      void seek(uint64_t offset) override;
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   private:
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      void key_schedule(const uint8_t[], size_t) override;
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      void generate();
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      const size_t m_SKIP;
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      uint8_t m_X = 0;
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      uint8_t m_Y = 0;
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      secure_vector<uint8_t> m_state;
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      secure_vector<uint8_t> m_buffer;
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      size_t m_position = 0;
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   };
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}
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#endif