moved iris-kit-esp8285 to subdir
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101
lib/Crypto/XTS.h
101
lib/Crypto/XTS.h
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/*
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* Copyright (C) 2016 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 CRYPTO_XTS_h
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#define CRYPTO_XTS_h
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#include "BlockCipher.h"
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class XTSSingleKeyCommon;
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class XTSCommon
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{
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public:
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virtual ~XTSCommon();
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virtual size_t keySize() const;
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size_t tweakSize() const;
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size_t sectorSize() const { return sectSize; }
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bool setSectorSize(size_t size);
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virtual bool setKey(const uint8_t *key, size_t len);
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bool setTweak(const uint8_t *tweak, size_t len);
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void encryptSector(uint8_t *output, const uint8_t *input);
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void decryptSector(uint8_t *output, const uint8_t *input);
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void clear();
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protected:
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XTSCommon();
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void setBlockCiphers(BlockCipher *cipher1, BlockCipher *cipher2)
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{
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blockCipher1 = cipher1;
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blockCipher2 = cipher2;
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}
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private:
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BlockCipher *blockCipher1;
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BlockCipher *blockCipher2;
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uint32_t twk[4];
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size_t sectSize;
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friend class XTSSingleKeyCommon;
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};
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class XTSSingleKeyCommon : public XTSCommon
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{
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public:
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virtual ~XTSSingleKeyCommon();
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size_t keySize() const;
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bool setKey(const uint8_t *key, size_t len);
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protected:
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XTSSingleKeyCommon() : XTSCommon() {}
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};
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template <typename T1, typename T2 = T1>
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class XTS : public XTSCommon
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{
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public:
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XTS() { setBlockCiphers(&cipher1, &cipher2); }
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~XTS() {}
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private:
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T1 cipher1;
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T2 cipher2;
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};
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template <typename T>
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class XTSSingleKey : public XTSSingleKeyCommon
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{
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public:
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XTSSingleKey() { setBlockCiphers(&cipher, &cipher); }
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~XTSSingleKey() {}
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private:
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T cipher;
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};
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#endif
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