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263 lines
9.7 KiB
C++
263 lines
9.7 KiB
C++
// lsh.h - written and placed in the public domain by Jeffrey Walton
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// Based on the specification and source code provided by
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// Korea Internet & Security Agency (KISA) website. Also
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// see https://seed.kisa.or.kr/kisa/algorithm/EgovLSHInfo.do
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// and https://seed.kisa.or.kr/kisa/Board/22/detailView.do.
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// We are hitting some sort of GCC bug in the LSH AVX2 code path.
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// Clang is OK on the AVX2 code path. We believe it is GCC Issue
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// 82735, https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82735. It
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// makes using zeroupper a little tricky.
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/// \file lsh.h
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/// \brief Classes for the LSH hash functions
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/// \since Crypto++ 8.6
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/// \sa <A HREF="https://seed.kisa.or.kr/kisa/algorithm/EgovLSHInfo.do">LSH</A>
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/// on the Korea Internet & Security Agency (KISA) website.
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#ifndef CRYPTOPP_LSH_H
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#define CRYPTOPP_LSH_H
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#include "cryptlib.h"
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#include "secblock.h"
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// Enable SSE2 and AVX2 for 64-bit machines.
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// 32-bit machines slow down with SSE2.
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#if (CRYPTOPP_BOOL_X32) || (CRYPTOPP_BOOL_X64)
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# define CRYPTOPP_ENABLE_64BIT_SSE 1
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#endif
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NAMESPACE_BEGIN(CryptoPP)
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/// \brief LSH-224 and LSH-256 hash base class
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/// \details LSH256_Base is the base class for both LSH-224 and LSH-256
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/// \since Crypto++ 8.6
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class LSH256_Base : public HashTransformation
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{
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public:
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/// \brief Block size, in bytes
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/// \details LSH_256 uses LSH256_MSG_BLK_BYTE_LEN for block size, which is 128
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CRYPTOPP_CONSTANT(BLOCKSIZE = 128);
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virtual ~LSH256_Base() {}
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unsigned int BlockSize() const { return BLOCKSIZE; }
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unsigned int DigestSize() const { return m_digestSize; }
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unsigned int OptimalDataAlignment() const { return GetAlignmentOf<word32>(); }
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void Restart();
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void Update(const byte *input, size_t size);
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void TruncatedFinal(byte *hash, size_t size);
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std::string AlgorithmProvider() const;
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protected:
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LSH256_Base(unsigned int algType, unsigned int digestSize)
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: m_digestSize(digestSize) { m_state[80] = algType; }
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protected:
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// Working state is:
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// * cv_l = 8 32-bit words
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// * cv_r = 8 32-bit words
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// * submsg_e_l = 8 32-bit words
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// * submsg_e_r = 8 32-bit words
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// * submsg_o_l = 8 32-bit words
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// * submsg_o_r = 8 32-bit words
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// * last_block = 32 32-bit words (128 bytes)
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// * algType
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// * remainingBitLength
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FixedSizeSecBlock<word32, 80+2> m_state;
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// word32 m_algType, m_remainingBitLength;
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word32 m_digestSize;
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};
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/// \brief LSH-224 hash function
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/// \sa <A HREF="https://seed.kisa.or.kr/kisa/algorithm/EgovLSHInfo.do">LSH</A>
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/// on the Korea Internet & Security Agency (KISA) website.
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/// \since Crypto++ 8.6
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class LSH224 : public LSH256_Base
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{
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public:
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/// \brief Digest size, in bytes
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/// \details LSH_256 uses LSH_GET_HASHBYTE(algType) for digest size, which is 28
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CRYPTOPP_CONSTANT(DIGESTSIZE = 28);
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/// \brief Block size, in bytes
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/// \details LSH_256 uses LSH256_MSG_BLK_BYTE_LEN for block size, which is 128
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CRYPTOPP_CONSTANT(BLOCKSIZE = LSH256_Base::BLOCKSIZE);
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/// \brief The algorithm's name
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/// \return the standard algorithm name
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/// \details The standard algorithm name can be a name like <tt>AES</tt> or <tt>AES/GCM</tt>.
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/// Some algorithms do not have standard names yet. For example, there is no standard
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/// algorithm name for Shoup's ECIES.
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/// \note StaticAlgorithmName is not universally implemented yet.
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static std::string StaticAlgorithmName() { return "LSH-224"; }
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/// \brief Construct a LSH-224
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/// \details LSH_TYPE_224 is the magic value 0x000001C defined in lsh.cpp.
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LSH224() : LSH256_Base(0x000001C, DIGESTSIZE) { Restart(); }
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std::string AlgorithmName() const { return StaticAlgorithmName(); }
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};
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/// \brief LSH-256 hash function
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/// \sa <A HREF="https://seed.kisa.or.kr/kisa/algorithm/EgovLSHInfo.do">LSH</A>
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/// on the Korea Internet & Security Agency (KISA) website.
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/// \since Crypto++ 8.6
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class LSH256 : public LSH256_Base
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{
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public:
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/// \brief Digest size, in bytes
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/// \details LSH_256 uses LSH_GET_HASHBYTE(algType) for digest size, which is 32
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CRYPTOPP_CONSTANT(DIGESTSIZE = 32);
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/// \brief Block size, in bytes
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/// \details LSH_256 uses LSH256_MSG_BLK_BYTE_LEN for block size, which is 128
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CRYPTOPP_CONSTANT(BLOCKSIZE = LSH256_Base::BLOCKSIZE);
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/// \brief The algorithm's name
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/// \return the standard algorithm name
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/// \details The standard algorithm name can be a name like <tt>AES</tt> or <tt>AES/GCM</tt>.
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/// Some algorithms do not have standard names yet. For example, there is no standard
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/// algorithm name for Shoup's ECIES.
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/// \note StaticAlgorithmName is not universally implemented yet.
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static std::string StaticAlgorithmName() { return "LSH-256"; }
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/// \brief Construct a LSH-256
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/// \details LSH_TYPE_256 is the magic value 0x0000020 defined in lsh.cpp.
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LSH256() : LSH256_Base(0x0000020, DIGESTSIZE) { Restart(); }
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std::string AlgorithmName() const { return StaticAlgorithmName(); }
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};
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/// \brief LSH-384 and LSH-512 hash base class
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/// \details LSH512_Base is the base class for both LSH-384 and LSH-512
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/// \since Crypto++ 8.6
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class LSH512_Base : public HashTransformation
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{
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public:
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/// \brief Block size, in bytes
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/// \details LSH_512 uses LSH512_MSG_BLK_BYTE_LEN for block size, which is 256
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CRYPTOPP_CONSTANT(BLOCKSIZE = 256);
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virtual ~LSH512_Base() {}
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unsigned int BlockSize() const { return BLOCKSIZE; }
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unsigned int DigestSize() const { return m_digestSize; }
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unsigned int OptimalDataAlignment() const { return GetAlignmentOf<word64>(); }
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void Restart();
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void Update(const byte *input, size_t size);
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void TruncatedFinal(byte *hash, size_t size);
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std::string AlgorithmProvider() const;
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protected:
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LSH512_Base(unsigned int algType, unsigned int digestSize)
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: m_digestSize(digestSize) { m_state[80] = algType; }
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protected:
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// Working state is:
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// * cv_l = 8 64-bit words
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// * cv_r = 8 64-bit words
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// * submsg_e_l = 8 64-bit words
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// * submsg_e_r = 8 64-bit words
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// * submsg_o_l = 8 64-bit words
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// * submsg_o_r = 8 64-bit words
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// * last_block = 32 64-bit words (256 bytes)
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// * algType
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// * remainingBitLength
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FixedSizeSecBlock<word64, 80+2> m_state;
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// word32 m_algType, m_remainingBitLength;
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word32 m_digestSize;
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};
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/// \brief LSH-384 hash function
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/// \sa <A HREF="https://seed.kisa.or.kr/kisa/algorithm/EgovLSHInfo.do">LSH</A>
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/// on the Korea Internet & Security Agency (KISA) website.
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/// \since Crypto++ 8.6
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class LSH384 : public LSH512_Base
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{
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public:
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/// \brief Digest size, in bytes
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/// \details LSH_512 uses LSH_GET_HASHBYTE(algType) for digest size, which is 48
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CRYPTOPP_CONSTANT(DIGESTSIZE = 48);
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/// \brief Block size, in bytes
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/// \details LSH_512 uses LSH512_MSG_BLK_BYTE_LEN for block size, which is 256
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CRYPTOPP_CONSTANT(BLOCKSIZE = LSH512_Base::BLOCKSIZE);
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/// \brief The algorithm's name
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/// \return the standard algorithm name
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/// \details The standard algorithm name can be a name like <tt>AES</tt> or <tt>AES/GCM</tt>.
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/// Some algorithms do not have standard names yet. For example, there is no standard
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/// algorithm name for Shoup's ECIES.
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/// \note StaticAlgorithmName is not universally implemented yet.
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static std::string StaticAlgorithmName() { return "LSH-384"; }
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/// \brief Construct a LSH-384
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/// \details LSH_TYPE_384 is the magic value 0x0010030 defined in lsh.cpp.
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LSH384() : LSH512_Base(0x0010030, DIGESTSIZE) { Restart(); }
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std::string AlgorithmName() const { return StaticAlgorithmName(); }
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};
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/// \brief LSH-512 hash function
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/// \sa <A HREF="https://seed.kisa.or.kr/kisa/algorithm/EgovLSHInfo.do">LSH</A>
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/// on the Korea Internet & Security Agency (KISA) website.
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/// \since Crypto++ 8.6
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class LSH512 : public LSH512_Base
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{
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public:
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/// \brief Digest size, in bytes
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/// \details LSH_512 uses LSH_GET_HASHBYTE(algType) for digest size, which is 64
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CRYPTOPP_CONSTANT(DIGESTSIZE = 64);
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/// \brief Block size, in bytes
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/// \details LSH_512 uses LSH512_MSG_BLK_BYTE_LEN for block size, which is 256
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CRYPTOPP_CONSTANT(BLOCKSIZE = LSH512_Base::BLOCKSIZE);
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/// \brief The algorithm's name
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/// \return the standard algorithm name
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/// \details The standard algorithm name can be a name like <tt>AES</tt> or <tt>AES/GCM</tt>.
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/// Some algorithms do not have standard names yet. For example, there is no standard
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/// algorithm name for Shoup's ECIES.
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/// \note StaticAlgorithmName is not universally implemented yet.
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static std::string StaticAlgorithmName() { return "LSH-512"; }
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/// \brief Construct a LSH-512
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/// \details LSH_TYPE_512 is the magic value 0x0010040 defined in lsh.cpp.
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LSH512() : LSH512_Base(0x0010040, DIGESTSIZE) { Restart(); }
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std::string AlgorithmName() const { return StaticAlgorithmName(); }
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};
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/// \brief LSH-512-256 hash function
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/// \sa <A HREF="https://seed.kisa.or.kr/kisa/algorithm/EgovLSHInfo.do">LSH</A>
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/// on the Korea Internet & Security Agency (KISA) website.
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/// \since Crypto++ 8.6
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class LSH512_256 : public LSH512_Base
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{
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public:
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/// \brief Digest size, in bytes
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/// \details LSH_512 uses LSH_GET_HASHBYTE(algType) for digest size, which is 32
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CRYPTOPP_CONSTANT(DIGESTSIZE = 32);
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/// \brief Block size, in bytes
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/// \details LSH_512 uses LSH512_MSG_BLK_BYTE_LEN for block size, which is 256
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CRYPTOPP_CONSTANT(BLOCKSIZE = LSH512_Base::BLOCKSIZE);
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/// \brief The algorithm's name
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/// \return the standard algorithm name
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/// \details The standard algorithm name can be a name like <tt>AES</tt> or <tt>AES/GCM</tt>.
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/// Some algorithms do not have standard names yet. For example, there is no standard
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/// algorithm name for Shoup's ECIES.
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/// \note StaticAlgorithmName is not universally implemented yet.
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static std::string StaticAlgorithmName() { return "LSH-512-256"; }
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/// \brief Construct a LSH-512-256
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/// \details LSH_TYPE_512_256 is the magic value 0x0010020 defined in lsh.cpp.
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LSH512_256() : LSH512_Base(0x0010020, DIGESTSIZE) { Restart(); }
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std::string AlgorithmName() const { return StaticAlgorithmName(); }
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};
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NAMESPACE_END
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#endif // CRYPTOPP_LSH_H
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