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62 lines
2.7 KiB
C++
62 lines
2.7 KiB
C++
// sm3.h - written and placed in the public domain by Jeffrey Walton and Han Lulu
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// Based on the specification provided by Sean Shen and Xiaodong Lee.
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// Based on code by Krzysztof Kwiatkowski and Jack Lloyd.
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// Also see https://tools.ietf.org/html/draft-shen-sm3-hash.
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/// \file sm3.h
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/// \brief Classes for the SM3 hash function
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/// \details SM3 is a hash function designed by Xiaoyun Wang, et al. The hash is part of the
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/// Chinese State Cryptography Administration portfolio.
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/// \sa <A HREF="https://tools.ietf.org/html/draft-shen-sm3-hash">SM3 Hash Function</A> and
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/// <A HREF="http://github.com/guanzhi/GmSSL">Reference implementation using OpenSSL</A>.
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/// \since Crypto++ 6.0
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#ifndef CRYPTOPP_SM3_H
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#define CRYPTOPP_SM3_H
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#include "config.h"
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#include "iterhash.h"
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NAMESPACE_BEGIN(CryptoPP)
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/// \brief SM3 hash function
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/// \details SM3 is a hash function designed by Xiaoyun Wang, et al. The hash is part of the
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/// Chinese State Cryptography Administration portfolio.
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/// \sa <A HREF="https://tools.ietf.org/html/draft-shen-sm3-hash">SM3 Hash Function</A>
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/// \since Crypto++ 6.0
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class SM3 : public IteratedHashWithStaticTransform<word32, BigEndian, 64, 32, SM3, 32, true>
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{
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public:
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/// \brief Initialize state array
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/// \param state the state of the hash
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/// \details InitState sets a state array to SHA256 initial values
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/// \details Hashes which derive from IteratedHashWithStaticTransform provide static
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/// member functions InitState() and Transform(). External classes, like SEAL and MDC,
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/// can initialize state with a user provided key and operate the hash on the data
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/// with the user supplied state.
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static void InitState(HashWordType *state);
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/// \brief Operate the hash
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/// \param digest the state of the hash
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/// \param data the data to be digested
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/// \details Transform() operates the hash on <tt>data</tt>. When the call is invoked
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/// <tt>digest</tt> holds initial or current state. Upon return <tt>digest</tt> holds
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/// the hash or updated state.
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/// \details Hashes which derive from IteratedHashWithStaticTransform provide static
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/// member functions InitState() and Transform(). External classes, like SEAL and MDC,
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/// can initialize state with a user provided key and operate the hash on the data
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/// with the user supplied state.
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static void Transform(HashWordType *digest, const HashWordType *data);
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/// \brief The algorithm name
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/// \returns C-style string "SM3"
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CRYPTOPP_STATIC_CONSTEXPR const char* StaticAlgorithmName() { return "SM3"; }
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protected:
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size_t HashMultipleBlocks(const HashWordType *input, size_t length);
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};
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NAMESPACE_END
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#endif // CRYPTOPP_SM3_H
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