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Extendable output functions: SHAKE128 and SHAKE256
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,137 @@ | ||
| /* | ||
| * Copyright (C) 2016 Southern Storm Software, Pty Ltd. | ||
| * | ||
| * Permission is hereby granted, free of charge, to any person obtaining a | ||
| * copy of this software and associated documentation files (the "Software"), | ||
| * to deal in the Software without restriction, including without limitation | ||
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, | ||
| * and/or sell copies of the Software, and to permit persons to whom the | ||
| * Software is furnished to do so, subject to the following conditions: | ||
| * | ||
| * The above copyright notice and this permission notice shall be included | ||
| * in all copies or substantial portions of the Software. | ||
| * | ||
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS | ||
| * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
| * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING | ||
| * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER | ||
| * DEALINGS IN THE SOFTWARE. | ||
| */ | ||
|
|
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| #include "SHAKE.h" | ||
|
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| /** | ||
| * \class SHAKE SHAKE.h <SHAKE.h> | ||
| * \brief Abstract base class for the SHAKE Extendable-Output Functions (XOFs). | ||
| * | ||
| * Reference: http://en.wikipedia.org/wiki/SHA-3 | ||
| * | ||
| * \sa SHAKE256, SHAKE128, SHA3_256 | ||
| */ | ||
|
|
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| /** | ||
| * \brief Constructs a SHAKE object. | ||
| * | ||
| * \param capacity The capacity of the Keccak sponge function in bits which | ||
| * should be a multiple of 64 and between 64 and 1536. | ||
| */ | ||
| SHAKE::SHAKE(size_t capacity) | ||
| : finalized(false) | ||
| { | ||
| core.setCapacity(capacity); | ||
| } | ||
|
|
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| /** | ||
| * \brief Destroys this SHAKE object after clearing all sensitive information. | ||
| */ | ||
| SHAKE::~SHAKE() | ||
| { | ||
| } | ||
|
|
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| size_t SHAKE::blockSize() const | ||
| { | ||
| return core.blockSize(); | ||
| } | ||
|
|
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| void SHAKE::reset() | ||
| { | ||
| core.reset(); | ||
| finalized = false; | ||
| } | ||
|
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| void SHAKE::update(const void *data, size_t len) | ||
| { | ||
| if (finalized) | ||
| reset(); | ||
| core.update(data, len); | ||
| } | ||
|
|
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| void SHAKE::extend(uint8_t *data, size_t len) | ||
| { | ||
| if (!finalized) { | ||
| core.pad(0x1F); | ||
| finalized = true; | ||
| } | ||
| core.extract(data, len); | ||
| } | ||
|
|
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| void SHAKE::encrypt(uint8_t *output, const uint8_t *input, size_t len) | ||
| { | ||
| if (!finalized) { | ||
| core.pad(0x1F); | ||
| finalized = true; | ||
| } | ||
| core.encrypt(output, input, len); | ||
| } | ||
|
|
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| void SHAKE::clear() | ||
| { | ||
| core.clear(); | ||
| finalized = false; | ||
| } | ||
|
|
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| /** | ||
| * \class SHAKE128 SHAKE.h <SHAKE.h> | ||
| * \brief SHAKE Extendable-Output Function (XOF) with 128-bit security. | ||
| * | ||
| * Reference: http://en.wikipedia.org/wiki/SHA-3 | ||
| * | ||
| * \sa SHAKE256, SHAKE, SHA3_256 | ||
| */ | ||
|
|
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| /** | ||
| * \fn SHAKE128::SHAKE128() | ||
| * \brief Constructs a SHAKE object with 128-bit security. | ||
| */ | ||
|
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| /** | ||
| * \brief Destroys this SHAKE128 object after clearing all sensitive | ||
| * information. | ||
| */ | ||
| SHAKE128::~SHAKE128() | ||
| { | ||
| } | ||
|
|
||
| /** | ||
| * \class SHAKE256 SHAKE.h <SHAKE.h> | ||
| * \brief SHAKE Extendable-Output Function (XOF) with 256-bit security. | ||
| * | ||
| * Reference: http://en.wikipedia.org/wiki/SHA-3 | ||
| * | ||
| * \sa SHAKE128, SHAKE, SHA3_256 | ||
| */ | ||
|
|
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| /** | ||
| * \fn SHAKE256::SHAKE256() | ||
| * \brief Constructs a SHAKE object with 256-bit security. | ||
| */ | ||
|
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| /** | ||
| * \brief Destroys this SHAKE256 object after clearing all sensitive | ||
| * information. | ||
| */ | ||
| SHAKE256::~SHAKE256() | ||
| { | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,66 @@ | ||
| /* | ||
| * Copyright (C) 2016 Southern Storm Software, Pty Ltd. | ||
| * | ||
| * Permission is hereby granted, free of charge, to any person obtaining a | ||
| * copy of this software and associated documentation files (the "Software"), | ||
| * to deal in the Software without restriction, including without limitation | ||
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, | ||
| * and/or sell copies of the Software, and to permit persons to whom the | ||
| * Software is furnished to do so, subject to the following conditions: | ||
| * | ||
| * The above copyright notice and this permission notice shall be included | ||
| * in all copies or substantial portions of the Software. | ||
| * | ||
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS | ||
| * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
| * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING | ||
| * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER | ||
| * DEALINGS IN THE SOFTWARE. | ||
| */ | ||
|
|
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| #ifndef CRYPTO_SHAKE_h | ||
| #define CRYPTO_SHAKE_h | ||
|
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| #include "XOF.h" | ||
| #include "KeccakCore.h" | ||
|
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| class SHAKE : public XOF | ||
| { | ||
| public: | ||
| virtual ~SHAKE(); | ||
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| size_t blockSize() const; | ||
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| void reset(); | ||
| void update(const void *data, size_t len); | ||
|
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| void extend(uint8_t *data, size_t len); | ||
| void encrypt(uint8_t *output, const uint8_t *input, size_t len); | ||
|
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| void clear(); | ||
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| protected: | ||
| SHAKE(size_t capacity); | ||
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| private: | ||
| KeccakCore core; | ||
| bool finalized; | ||
| }; | ||
|
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| class SHAKE128 : public SHAKE | ||
| { | ||
| public: | ||
| SHAKE128() : SHAKE(256) {} | ||
| virtual ~SHAKE128(); | ||
| }; | ||
|
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| class SHAKE256 : public SHAKE | ||
| { | ||
| public: | ||
| SHAKE256() : SHAKE(512) {} | ||
| virtual ~SHAKE256(); | ||
| }; | ||
|
|
||
| #endif |
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