mirror of
https://github.com/taigrr/arduinolibs
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77 lines
2.5 KiB
C++
77 lines
2.5 KiB
C++
/*
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* Copyright (C) 2018 Southern Storm Software, Pty Ltd.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#ifndef NOISE_SYMMETRIC_STATE_CHACHAPOLY_SHA256_H
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#define NOISE_SYMMETRIC_STATE_CHACHAPOLY_SHA256_H
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#include "NoiseSymmetricState.h"
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#include "SHA256.h"
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class NoiseSymmetricState_ChaChaPoly_SHA256 : public NoiseSymmetricState
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{
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public:
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NoiseSymmetricState_ChaChaPoly_SHA256();
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virtual ~NoiseSymmetricState_ChaChaPoly_SHA256();
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void initialize(const char *protocolName);
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bool hasKey() const;
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bool mixPrologue(const void *data, size_t size);
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void mixKey(const void *data, size_t size);
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void mixHash(const void *data, size_t size);
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void mixKeyAndHash(const void *data, size_t size);
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void getHandshakeHash(void *data, size_t size);
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int encryptAndHash
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(uint8_t *output, size_t outputSize,
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const uint8_t *input, size_t inputSize);
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int decryptAndHash
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(uint8_t *output, size_t outputSize,
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const uint8_t *input, size_t inputSize);
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void split(NoiseCipherState **c1, NoiseCipherState **c2);
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void clear();
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private:
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SHA256 hash;
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struct {
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uint8_t ck[32];
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uint8_t h[32];
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uint8_t key[32];
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uint64_t n;
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bool hasKey;
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bool inPrologue;
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} st;
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void doEndPrologue();
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void endPrologue() { if (st.inPrologue) doEndPrologue(); }
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void hmac(uint8_t *output, const uint8_t *key,
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const void *data, size_t size, uint8_t tag);
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};
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#endif
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