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#ifndef BOOST_HASH2_BLAKE2_HPP_INCLUDED #define BOOST_HASH2_BLAKE2_HPP_INCLUDED // Copyright 2025 Christian Mazakas. // Distributed under the Boost Software License, Version 1.0. // https://www.boost.org/LICENSE_1_0.txt // #include #include #include #include #include #include #include #include #include #include #include #include #if !defined(BOOST_HASH2_BLAKE2_CONSTEXPR) #if BOOST_WORKAROUND(BOOST_GCC, >= 50000 && BOOST_GCC < 60000) #define BOOST_HASH2_BLAKE2_CONSTEXPR #else #define BOOST_HASH2_BLAKE2_CONSTEXPR BOOST_CXX14_CONSTEXPR #endif #endif namespace boost { namespace hash2 { namespace detail { template struct blake2b_constants { constexpr static const std::uint64_t iv[ 8 ] = { 0x6a09e667f3bcc908, 0xbb67ae8584caa73b, 0x3c6ef372fe94f82b, 0xa54ff53a5f1d36f1, 0x510e527fade682d1, 0x9b05688c2b3e6c1f, 0x1f83d9abfb41bd6b, 0x5be0cd19137e2179, }; }; template struct blake2s_constants { constexpr static const std::uint32_t iv[ 8 ] = { 0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a, 0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19, }; }; // copy-paste from Boost.Unordered's prime_fmod approach #if defined(BOOST_NO_CXX17_INLINE_VARIABLES) // https://en.cppreference.com/w/cpp/language/static#Constant_static_members // If a const non-inline (since C++17) static data member or a constexpr // static data member (since C++11)(until C++17) is odr-used, a definition // at namespace scope is still required, but it cannot have an // initializer. template constexpr std::uint64_t blake2b_constants::iv[ 8 ]; template constexpr std::uint32_t blake2s_constants::iv[ 8 ]; #endif } // namespace detail class blake2b_512 { private: unsigned char b_[ 128 ] = {}; std::uint64_t h_[ 8 ] = {}; std::uint64_t t_[ 2 ] = {}; std::size_t m_ = 0; BOOST_HASH2_BLAKE2_CONSTEXPR void init( std::uint64_t keylen = 0 ) { for( int i = 0; i < 8; ++i ) { h_[ i ] = detail::blake2b_constants<>::iv[ i ]; } std::uint64_t const outlen = 64; h_[ 0 ] ^= 0x01010000 ^ ( keylen << 8 ) ^ outlen; } BOOST_HASH2_BLAKE2_CONSTEXPR BOOST_FORCEINLINE static void G( std::uint64_t v[ 16 ], int a, int b, int c, int d, std::uint64_t x, std::uint64_t y ) { v[ a ] = v[ a ] + v[ b ] + x; v[ d ] = detail::rotr( v[ d ] ^ v[ a ], 32 ); v[ c ] = v[ c ] + v[ d ]; v[ b ] = detail::rotr( v[ b ] ^ v[ c ], 24 ); v[ a ] = v[ a ] + v[ b ] + y; v[ d ] = detail::rotr( v[ d ] ^ v[ a ], 16 ); v[ c ] = v[ c ] + v[ d ]; v[ b ] = detail::rotr( v[ b ] ^ v[ c ], 63 ); } BOOST_HASH2_BLAKE2_CONSTEXPR void transform( unsigned char const block[ 128 ], bool is_final = false ) { auto iv = detail::blake2b_constants<>::iv; std::uint64_t v[ 16 ] = {}; std::uint64_t m[ 16 ] = {}; v[ 0 ] = h_[ 0 ]; v[ 1 ] = h_[ 1 ]; v[ 2 ] = h_[ 2 ]; v[ 3 ] = h_[ 3 ]; v[ 4 ] = h_[ 4 ]; v[ 5 ] = h_[ 5 ]; v[ 6 ] = h_[ 6 ]; v[ 7 ] = h_[ 7 ]; v[ 8 ] = iv[ 0 ]; v[ 9 ] = iv[ 1 ]; v[ 10 ] = iv[ 2 ]; v[ 11 ] = iv[ 3 ]; v[ 12 ] = iv[ 4 ]; v[ 13 ] = iv[ 5 ]; v[ 14 ] = iv[ 6 ]; v[ 15 ] = iv[ 7 ]; v[ 12 ] ^= t_[ 0 ]; v[ 13 ] ^= t_[ 1 ]; if( is_final ) { v[ 14 ] = ~v[ 14 ]; } for( int i = 0; i < 16; ++i ) { m[ i ] = detail::read64le( block + 8 * i ); } // round 0 G( v, 0, 4, 8, 12, m[ 0 ], m[ 1 ] ); G( v, 1, 5, 9, 13, m[ 2 ], m[ 3 ] ); G( v, 2, 6, 10, 14, m[ 4 ], m[ 5 ] ); G( v, 3, 7, 11, 15, m[ 6 ], m[ 7 ] ); G( v, 0, 5, 10, 15, m[ 8 ], m[ 9 ] ); G( v, 1, 6, 11, 12, m[ 10 ], m[ 11 ] ); G( v, 2, 7, 8, 13, m[ 12 ], m[ 13 ] ); G( v, 3, 4, 9, 14, m[ 14 ], m[ 15 ] ); // round 1 G( v, 0, 4, 8, 12, m[ 14 ], m[ 10 ] ); G( v, 1, 5, 9, 13, m[ 4 ], m[ 8 ] ); G( v, 2, 6, 10, 14, m[ 9 ], m[ 15 ] ); G( v, 3, 7, 11, 15, m[ 13 ], m[ 6 ] ); G( v, 0, 5, 10, 15, m[ 1 ], m[ 12 ] ); G( v, 1, 6, 11, 12, m[ 0 ], m[ 2 ] ); G( v, 2, 7, 8, 13, m[ 11 ], m[ 7 ] ); G( v, 3, 4, 9, 14, m[ 5 ], m[ 3 ] ); // round 2 G( v, 0, 4, 8, 12, m[ 11 ], m[ 8 ] ); G( v, 1, 5, 9, 13, m[ 12 ], m[ 0 ] ); G( v, 2, 6, 10, 14, m[ 5 ], m[ 2 ] ); G( v, 3, 7, 11, 15, m[ 15 ], m[ 13 ] ); G( v, 0, 5, 10, 15, m[ 10 ], m[ 14 ] ); G( v, 1, 6, 11, 12, m[ 3 ], m[ 6 ] ); G( v, 2, 7, 8, 13, m[ 7 ], m[ 1 ] ); G( v, 3, 4, 9, 14, m[ 9 ], m[ 4 ] ); // round 3 G( v, 0, 4, 8, 12, m[ 7 ], m[ 9 ] ); G( v, 1, 5, 9, 13, m[ 3 ], m[ 1 ] ); G( v, 2, 6, 10, 14, m[ 13 ], m[ 12 ] ); G( v, 3, 7, 11, 15, m[ 11 ], m[ 14 ] ); G( v, 0, 5, 10, 15, m[ 2 ], m[ 6 ] ); G( v, 1, 6, 11, 12, m[ 5 ], m[ 10 ] ); G( v, 2, 7, 8, 13, m[ 4 ], m[ 0 ] ); G( v, 3, 4, 9, 14, m[ 15 ], m[ 8 ] ); // round 4 G( v, 0, 4, 8, 12, m[ 9 ], m[ 0 ] ); G( v, 1, 5, 9, 13, m[ 5 ], m[ 7 ] ); G( v, 2, 6, 10, 14, m[ 2 ], m[ 4 ] ); G( v, 3, 7, 11, 15, m[ 10 ], m[ 15 ] ); G( v, 0, 5, 10, 15, m[ 14 ], m[ 1 ] ); G( v, 1, 6, 11, 12, m[ 11 ], m[ 12 ] ); G( v, 2, 7, 8, 13, m[ 6 ], m[ 8 ] ); G( v, 3, 4, 9, 14, m[ 3 ], m[ 13 ] ); // round 5 G( v, 0, 4, 8, 12, m[ 2 ], m[ 12 ] ); G( v, 1, 5, 9, 13, m[ 6 ], m[ 10 ] ); G( v, 2, 6, 10, 14, m[ 0 ], m[ 11 ] ); G( v, 3, 7, 11, 15, m[ 8 ], m[ 3 ] ); G( v, 0, 5, 10, 15, m[ 4 ], m[ 13 ] ); G( v, 1, 6, 11, 12, m[ 7 ], m[ 5 ] ); G( v, 2, 7, 8, 13, m[ 15 ], m[ 14 ] ); G( v, 3, 4, 9, 14, m[ 1 ], m[ 9 ] ); // round 6 G( v, 0, 4, 8, 12, m[ 12 ], m[ 5 ] ); G( v, 1, 5, 9, 13, m[ 1 ], m[ 15 ] ); G( v, 2, 6, 10, 14, m[ 14 ], m[ 13 ] ); G( v, 3, 7, 11, 15, m[ 4 ], m[ 10 ] ); G( v, 0, 5, 10, 15, m[ 0 ], m[ 7 ] ); G( v, 1, 6, 11, 12, m[ 6 ], m[ 3 ] ); G( v, 2, 7, 8, 13, m[ 9 ], m[ 2 ] ); G( v, 3, 4, 9, 14, m[ 8 ], m[ 11 ] ); // round 7 G( v, 0, 4, 8, 12, m[ 13 ], m[ 11 ] ); G( v, 1, 5, 9, 13, m[ 7 ], m[ 14 ] ); G( v, 2, 6, 10, 14, m[ 12 ], m[ 1 ] ); G( v, 3, 7, 11, 15, m[ 3 ], m[ 9 ] ); G( v, 0, 5, 10, 15, m[ 5 ], m[ 0 ] ); G( v, 1, 6, 11, 12, m[ 15 ], m[ 4 ] ); G( v, 2, 7, 8, 13, m[ 8 ], m[ 6 ] ); G( v, 3, 4, 9, 14, m[ 2 ], m[ 10 ] ); // round 8 G( v, 0, 4, 8, 12, m[ 6 ], m[ 15 ] ); G( v, 1, 5, 9, 13, m[ 14 ], m[ 9 ] ); G( v, 2, 6, 10, 14, m[ 11 ], m[ 3 ] ); G( v, 3, 7, 11, 15, m[ 0 ], m[ 8 ] ); G( v, 0, 5, 10, 15, m[ 12 ], m[ 2 ] ); G( v, 1, 6, 11, 12, m[ 13 ], m[ 7 ] ); G( v, 2, 7, 8, 13, m[ 1 ], m[ 4 ] ); G( v, 3, 4, 9, 14, m[ 10 ], m[ 5 ] ); // round 9 G( v, 0, 4, 8, 12, m[ 10 ], m[ 2 ] ); G( v, 1, 5, 9, 13, m[ 8 ], m[ 4 ] ); G( v, 2, 6, 10, 14, m[ 7 ], m[ 6 ] ); G( v, 3, 7, 11, 15, m[ 1 ], m[ 5 ] ); G( v, 0, 5, 10, 15, m[ 15 ], m[ 11 ] ); G( v, 1, 6, 11, 12, m[ 9 ], m[ 14 ] ); G( v, 2, 7, 8, 13, m[ 3 ], m[ 12 ] ); G( v, 3, 4, 9, 14, m[ 13 ], m[ 0 ] ); // round 10 G( v, 0, 4, 8, 12, m[ 0 ], m[ 1 ] ); G( v, 1, 5, 9, 13, m[ 2 ], m[ 3 ] ); G( v, 2, 6, 10, 14, m[ 4 ], m[ 5 ] ); G( v, 3, 7, 11, 15, m[ 6 ], m[ 7 ] ); G( v, 0, 5, 10, 15, m[ 8 ], m[ 9 ] ); G( v, 1, 6, 11, 12, m[ 10 ], m[ 11 ] ); G( v, 2, 7, 8, 13, m[ 12 ], m[ 13 ] ); G( v, 3, 4, 9, 14, m[ 14 ], m[ 15 ] ); // round 11 G( v, 0, 4, 8, 12, m[ 14 ], m[ 10 ] ); G( v, 1, 5, 9, 13, m[ 4 ], m[ 8 ] ); G( v, 2, 6, 10, 14, m[ 9 ], m[ 15 ] ); G( v, 3, 7, 11, 15, m[ 13 ], m[ 6 ] ); G( v, 0, 5, 10, 15, m[ 1 ], m[ 12 ] ); G( v, 1, 6, 11, 12, m[ 0 ], m[ 2 ] ); G( v, 2, 7, 8, 13, m[ 11 ], m[ 7 ] ); G( v, 3, 4, 9, 14, m[ 5 ], m[ 3 ] ); h_[ 0 ] ^= v[ 0 ] ^ v[ 0 + 8 ]; h_[ 1 ] ^= v[ 1 ] ^ v[ 1 + 8 ]; h_[ 2 ] ^= v[ 2 ] ^ v[ 2 + 8 ]; h_[ 3 ] ^= v[ 3 ] ^ v[ 3 + 8 ]; h_[ 4 ] ^= v[ 4 ] ^ v[ 4 + 8 ]; h_[ 5 ] ^= v[ 5 ] ^ v[ 5 + 8 ]; h_[ 6 ] ^= v[ 6 ] ^ v[ 6 + 8 ]; h_[ 7 ] ^= v[ 7 ] ^ v[ 7 + 8 ]; } BOOST_HASH2_BLAKE2_CONSTEXPR BOOST_FORCEINLINE void incr_len( std::size_t n ) { t_[ 0 ] += n; t_[ 1 ] += ( t_[ 0 ] < n ); // overflowed } public: using result_type = digest<64>; static constexpr std::size_t block_size = 128; BOOST_HASH2_BLAKE2_CONSTEXPR blake2b_512() { init(); } BOOST_HASH2_BLAKE2_CONSTEXPR explicit blake2b_512( std::uint64_t seed ) { if( seed == 0 ) { init(); return; } unsigned char tmp[ 8 ] = {}; detail::write64le( tmp, seed ); init( 8 ); update( tmp, 8 ); m_ = block_size; } blake2b_512( void const* p, std::size_t n ) : blake2b_512( static_cast( p ), n ) { } BOOST_HASH2_BLAKE2_CONSTEXPR blake2b_512( unsigned char const* p, std::size_t n ) { if( n == 0 ) { init(); return; } auto k = n; if( k > block_size / 2 ) { k = block_size / 2; } init( k ); update( p, k ); m_ = block_size; p += k; n -= k; if( n != 0 ) { update( p, n ); result(); } } void update( void const* pv, std::size_t n ) { unsigned char const* p = reinterpret_cast( pv ); update( p, n ); } BOOST_HASH2_BLAKE2_CONSTEXPR void update( unsigned char const* p, std::size_t n ) { if( n > 0 ) { std::size_t k = block_size - m_; if( n > k ) { detail::memcpy( b_ + m_, p, k ); incr_len( block_size ); transform( b_ ); detail::memset( b_ , 0, block_size ); p += k; n -= k; m_ = 0; while( n > block_size ) { incr_len( block_size ); transform( p ); p += block_size; n -= block_size; } } detail::memcpy( b_ + m_, p, n ); m_ += n; } } BOOST_HASH2_BLAKE2_CONSTEXPR result_type result() { result_type digest; incr_len( m_ ); for( auto i = m_; i < block_size; ++i ) { b_[ i ] = 0; } transform( b_, true ); detail::memset( b_ , 0, block_size ); m_ = 0; for( int i = 0; i < 8; ++i ) { detail::write64le( digest.data() + i * 8, h_[ i ] ); } return digest; } }; class blake2s_256 { private: unsigned char b_[ 64 ] = {}; std::uint32_t h_[ 8 ] = {}; std::uint32_t t_[ 2 ] = {}; std::size_t m_ = 0; BOOST_HASH2_BLAKE2_CONSTEXPR void init( std::uint32_t keylen = 0 ) { for( int i = 0; i < 8; ++i ) { h_[ i ] = detail::blake2s_constants<>::iv[ i ]; } std::uint32_t const outlen = 32; h_[ 0 ] ^= 0x01010000 ^ ( keylen << 8 ) ^ outlen; } BOOST_HASH2_BLAKE2_CONSTEXPR BOOST_FORCEINLINE static void G( std::uint32_t v[ 16 ], int a, int b, int c, int d, std::uint32_t x, std::uint32_t y ) { v[ a ] = v[ a ] + v[ b ] + x; v[ d ] = detail::rotr( v[ d ] ^ v[ a ], 16 ); v[ c ] = v[ c ] + v[ d ]; v[ b ] = detail::rotr( v[ b ] ^ v[ c ], 12 ); v[ a ] = v[ a ] + v[ b ] + y; v[ d ] = detail::rotr( v[ d ] ^ v[ a ], 8 ); v[ c ] = v[ c ] + v[ d ]; v[ b ] = detail::rotr( v[ b ] ^ v[ c ], 7 ); } BOOST_HASH2_BLAKE2_CONSTEXPR void transform( unsigned char const block[ 64 ], bool is_final = false ) { auto iv = detail::blake2s_constants<>::iv; std::uint32_t v[ 16 ] = {}; std::uint32_t m[ 16 ] = {}; v[ 0 ] = h_[ 0 ]; v[ 1 ] = h_[ 1 ]; v[ 2 ] = h_[ 2 ]; v[ 3 ] = h_[ 3 ]; v[ 4 ] = h_[ 4 ]; v[ 5 ] = h_[ 5 ]; v[ 6 ] = h_[ 6 ]; v[ 7 ] = h_[ 7 ]; v[ 8 ] = iv[ 0 ]; v[ 9 ] = iv[ 1 ]; v[ 10 ] = iv[ 2 ]; v[ 11 ] = iv[ 3 ]; v[ 12 ] = iv[ 4 ]; v[ 13 ] = iv[ 5 ]; v[ 14 ] = iv[ 6 ]; v[ 15 ] = iv[ 7 ]; v[ 12 ] ^= t_[ 0 ]; v[ 13 ] ^= t_[ 1 ]; if( is_final ) { v[ 14 ] = ~v[ 14 ]; } for( int i = 0; i < 16; ++i ) { m[ i ] = detail::read32le( block + 4 * i ); } // round 0 G( v, 0, 4, 8, 12, m[ 0 ], m[ 1 ] ); G( v, 1, 5, 9, 13, m[ 2 ], m[ 3 ] ); G( v, 2, 6, 10, 14, m[ 4 ], m[ 5 ] ); G( v, 3, 7, 11, 15, m[ 6 ], m[ 7 ] ); G( v, 0, 5, 10, 15, m[ 8 ], m[ 9 ] ); G( v, 1, 6, 11, 12, m[ 10 ], m[ 11 ] ); G( v, 2, 7, 8, 13, m[ 12 ], m[ 13 ] ); G( v, 3, 4, 9, 14, m[ 14 ], m[ 15 ] ); // round 1 G( v, 0, 4, 8, 12, m[ 14 ], m[ 10 ] ); G( v, 1, 5, 9, 13, m[ 4 ], m[ 8 ] ); G( v, 2, 6, 10, 14, m[ 9 ], m[ 15 ] ); G( v, 3, 7, 11, 15, m[ 13 ], m[ 6 ] ); G( v, 0, 5, 10, 15, m[ 1 ], m[ 12 ] ); G( v, 1, 6, 11, 12, m[ 0 ], m[ 2 ] ); G( v, 2, 7, 8, 13, m[ 11 ], m[ 7 ] ); G( v, 3, 4, 9, 14, m[ 5 ], m[ 3 ] ); // round 2 G( v, 0, 4, 8, 12, m[ 11 ], m[ 8 ] ); G( v, 1, 5, 9, 13, m[ 12 ], m[ 0 ] ); G( v, 2, 6, 10, 14, m[ 5 ], m[ 2 ] ); G( v, 3, 7, 11, 15, m[ 15 ], m[ 13 ] ); G( v, 0, 5, 10, 15, m[ 10 ], m[ 14 ] ); G( v, 1, 6, 11, 12, m[ 3 ], m[ 6 ] ); G( v, 2, 7, 8, 13, m[ 7 ], m[ 1 ] ); G( v, 3, 4, 9, 14, m[ 9 ], m[ 4 ] ); // round 3 G( v, 0, 4, 8, 12, m[ 7 ], m[ 9 ] ); G( v, 1, 5, 9, 13, m[ 3 ], m[ 1 ] ); G( v, 2, 6, 10, 14, m[ 13 ], m[ 12 ] ); G( v, 3, 7, 11, 15, m[ 11 ], m[ 14 ] ); G( v, 0, 5, 10, 15, m[ 2 ], m[ 6 ] ); G( v, 1, 6, 11, 12, m[ 5 ], m[ 10 ] ); G( v, 2, 7, 8, 13, m[ 4 ], m[ 0 ] ); G( v, 3, 4, 9, 14, m[ 15 ], m[ 8 ] ); // round 4 G( v, 0, 4, 8, 12, m[ 9 ], m[ 0 ] ); G( v, 1, 5, 9, 13, m[ 5 ], m[ 7 ] ); G( v, 2, 6, 10, 14, m[ 2 ], m[ 4 ] ); G( v, 3, 7, 11, 15, m[ 10 ], m[ 15 ] ); G( v, 0, 5, 10, 15, m[ 14 ], m[ 1 ] ); G( v, 1, 6, 11, 12, m[ 11 ], m[ 12 ] ); G( v, 2, 7, 8, 13, m[ 6 ], m[ 8 ] ); G( v, 3, 4, 9, 14, m[ 3 ], m[ 13 ] ); // round 5 G( v, 0, 4, 8, 12, m[ 2 ], m[ 12 ] ); G( v, 1, 5, 9, 13, m[ 6 ], m[ 10 ] ); G( v, 2, 6, 10, 14, m[ 0 ], m[ 11 ] ); G( v, 3, 7, 11, 15, m[ 8 ], m[ 3 ] ); G( v, 0, 5, 10, 15, m[ 4 ], m[ 13 ] ); G( v, 1, 6, 11, 12, m[ 7 ], m[ 5 ] ); G( v, 2, 7, 8, 13, m[ 15 ], m[ 14 ] ); G( v, 3, 4, 9, 14, m[ 1 ], m[ 9 ] ); // round 6 G( v, 0, 4, 8, 12, m[ 12 ], m[ 5 ] ); G( v, 1, 5, 9, 13, m[ 1 ], m[ 15 ] ); G( v, 2, 6, 10, 14, m[ 14 ], m[ 13 ] ); G( v, 3, 7, 11, 15, m[ 4 ], m[ 10 ] ); G( v, 0, 5, 10, 15, m[ 0 ], m[ 7 ] ); G( v, 1, 6, 11, 12, m[ 6 ], m[ 3 ] ); G( v, 2, 7, 8, 13, m[ 9 ], m[ 2 ] ); G( v, 3, 4, 9, 14, m[ 8 ], m[ 11 ] ); // round 7 G( v, 0, 4, 8, 12, m[ 13 ], m[ 11 ] ); G( v, 1, 5, 9, 13, m[ 7 ], m[ 14 ] ); G( v, 2, 6, 10, 14, m[ 12 ], m[ 1 ] ); G( v, 3, 7, 11, 15, m[ 3 ], m[ 9 ] ); G( v, 0, 5, 10, 15, m[ 5 ], m[ 0 ] ); G( v, 1, 6, 11, 12, m[ 15 ], m[ 4 ] ); G( v, 2, 7, 8, 13, m[ 8 ], m[ 6 ] ); G( v, 3, 4, 9, 14, m[ 2 ], m[ 10 ] ); // round 8 G( v, 0, 4, 8, 12, m[ 6 ], m[ 15 ] ); G( v, 1, 5, 9, 13, m[ 14 ], m[ 9 ] ); G( v, 2, 6, 10, 14, m[ 11 ], m[ 3 ] ); G( v, 3, 7, 11, 15, m[ 0 ], m[ 8 ] ); G( v, 0, 5, 10, 15, m[ 12 ], m[ 2 ] ); G( v, 1, 6, 11, 12, m[ 13 ], m[ 7 ] ); G( v, 2, 7, 8, 13, m[ 1 ], m[ 4 ] ); G( v, 3, 4, 9, 14, m[ 10 ], m[ 5 ] ); // round 9 G( v, 0, 4, 8, 12, m[ 10 ], m[ 2 ] ); G( v, 1, 5, 9, 13, m[ 8 ], m[ 4 ] ); G( v, 2, 6, 10, 14, m[ 7 ], m[ 6 ] ); G( v, 3, 7, 11, 15, m[ 1 ], m[ 5 ] ); G( v, 0, 5, 10, 15, m[ 15 ], m[ 11 ] ); G( v, 1, 6, 11, 12, m[ 9 ], m[ 14 ] ); G( v, 2, 7, 8, 13, m[ 3 ], m[ 12 ] ); G( v, 3, 4, 9, 14, m[ 13 ], m[ 0 ] ); h_[ 0 ] ^= v[ 0 ] ^ v[ 0 + 8 ]; h_[ 1 ] ^= v[ 1 ] ^ v[ 1 + 8 ]; h_[ 2 ] ^= v[ 2 ] ^ v[ 2 + 8 ]; h_[ 3 ] ^= v[ 3 ] ^ v[ 3 + 8 ]; h_[ 4 ] ^= v[ 4 ] ^ v[ 4 + 8 ]; h_[ 5 ] ^= v[ 5 ] ^ v[ 5 + 8 ]; h_[ 6 ] ^= v[ 6 ] ^ v[ 6 + 8 ]; h_[ 7 ] ^= v[ 7 ] ^ v[ 7 + 8 ]; } BOOST_HASH2_BLAKE2_CONSTEXPR void incr_len( std::size_t n ) { auto m = static_cast( n ); t_[ 0 ] += m; t_[ 1 ] += ( t_[ 0 ] < m ); // overflowed } public: using result_type = digest<32>; static constexpr std::size_t block_size = 64; BOOST_HASH2_BLAKE2_CONSTEXPR blake2s_256() { init(); } BOOST_HASH2_BLAKE2_CONSTEXPR explicit blake2s_256( std::uint64_t seed ) { if( seed == 0 ) { init(); return; } unsigned char tmp[ 8 ] = {}; detail::write64le( tmp, seed ); init( 8 ); update( tmp, 8 ); m_ = block_size; } blake2s_256( void const* p, std::size_t n ) : blake2s_256( static_cast( p ), n ) { } BOOST_HASH2_BLAKE2_CONSTEXPR blake2s_256( unsigned char const* p, std::size_t n ) { if( n == 0 ) { init(); return; } auto k = n; if( k > block_size / 2 ) { k = block_size / 2; } init( static_cast( k ) ); update( p, k ); m_ = block_size; p += k; n -= k; if( n != 0 ) { update( p, n ); result(); } } void update( void const* pv, std::size_t n ) { unsigned char const* p = reinterpret_cast( pv ); update( p, n ); } BOOST_HASH2_BLAKE2_CONSTEXPR void update( unsigned char const* p, std::size_t n ) { if( n > 0 ) { std::size_t k = block_size - m_; if( n > k ) { detail::memcpy( b_ + m_, p, k ); incr_len( block_size ); transform( b_ ); detail::memset( b_ , 0, block_size ); p += k; n -= k; m_ = 0; while( n > block_size ) { incr_len( block_size ); transform( p ); p += block_size; n -= block_size; } } detail::memcpy( b_ + m_, p, n ); m_ += n; } } BOOST_HASH2_BLAKE2_CONSTEXPR result_type result() { result_type digest; incr_len( m_ ); for( auto i = m_; i < block_size; ++i ) { b_[ i ] = 0; } transform( b_, true ); detail::memset( b_ , 0, block_size ); m_ = 0; for( int i = 0; i < 8; ++i ) { detail::write32le( digest.data() + i * 4, h_[ i ] ); } return digest; } }; using hmac_blake2b_512 = hmac; using hmac_blake2s_256 = hmac; } // namespace hash2 } // namespace boost #endif // BOOST_HASH2_BLAKE2_HPP_INCLUDED