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39 lines
1.8 KiB
C++
39 lines
1.8 KiB
C++
/*
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* All or portions of this file Copyright (c) Amazon.com, Inc. or its affiliates or
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* its licensors.
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*
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* For complete copyright and license terms please see the LICENSE at the root of this
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* distribution (the "License"). All use of this software is governed by the License,
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* or, if provided, by the license below or the license accompanying this file. Do not
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* remove or modify any license notices. This file is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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*
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*/
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/****************************************************
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A simple stream cipher based on RC4
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****************************************************/
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#ifndef CRYINCLUDE_CRYPTOGRAPHY_STREAMCIPHER_H
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#define CRYINCLUDE_CRYPTOGRAPHY_STREAMCIPHER_H
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#pragma once
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#include <ICrypto.h>
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class CStreamCipher
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: public IStreamCipher
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{
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public:
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StreamCipherState BeginCipher(const uint8* pKey, uint32 keyLength);
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void Init(StreamCipherState& state, const uint8* key, int keyLen);
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void Encrypt(StreamCipherState& state, const uint8* input, int inputLen, uint8* output) { ProcessBuffer(state, input, inputLen, output, true); }
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void Decrypt(StreamCipherState& state, const uint8* input, int inputLen, uint8* output) { ProcessBuffer(state, input, inputLen, output, true); }
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void EncryptStream(StreamCipherState& state, const uint8* input, int inputLen, uint8* output) { ProcessBuffer(state, input, inputLen, output, false); }
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void DecryptStream(StreamCipherState& state, const uint8* input, int inputLen, uint8* output) { ProcessBuffer(state, input, inputLen, output, false); }
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private:
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uint8 GetNext(StreamCipherState& state);
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void ProcessBuffer(StreamCipherState& state, const uint8* input, int inputLen, uint8* output, bool resetKey);
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};
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#endif // CRYINCLUDE_CRYPTOGRAPHY_STREAMCIPHER_H
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