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298 lines
9.9 KiB
C++
298 lines
9.9 KiB
C++
/**
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* @file sha512.hh
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* @author Stefan Wilhelm (stfwi)
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* @ccflags
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* @ldflags
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* @platform linux, bsd, windows
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* @standard >= c++98
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*
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* SHA512 calculation class template.
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*
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* -------------------------------------------------------------------------------------
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* +++ BSD license header +++
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* Copyright (c) 2010, 2012, Stefan Wilhelm (stfwi, <cerbero s@atwilly s.de>)
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* All rights reserved.
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met: (1) Redistributions
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* of source code must retain the above copyright notice, this list of conditions
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* and the following disclaimer. (2) Redistributions in binary form must reproduce
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* the above copyright notice, this list of conditions and the following disclaimer
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* in the documentation and/or other materials provided with the distribution.
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* (3) Neither the name of the project nor the names of its contributors may be
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* used to endorse or promote products derived from this software without specific
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* prior written permission. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS
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* AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER
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* OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
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* WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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* -------------------------------------------------------------------------------------
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* 01-2013: (stfwi) Class to template class, reformatting
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*/
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#ifndef SHA512_HH
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#define SHA512_HH
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#if defined(OS_WIN) || defined (_WINDOWS_) || defined(_WIN32) || defined(__MSC_VER)
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#include <inttypes.h>
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#else
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#include <stdint.h>
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#endif
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#include <sstream>
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#include <iomanip>
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#include <fstream>
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#include <iostream>
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#include <string>
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#include <cstdlib>
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#include <cstring>
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namespace sw { namespace detail {
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/**
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* @class basic_sha512
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* @template
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*/
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template <typename Char_Type=char>
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class basic_sha512
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{
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public:
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/**
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* Types
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*/
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typedef std::basic_string<Char_Type> str_t;
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public:
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/**
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* Constructor
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*/
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basic_sha512()
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{ clear(); }
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/**
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* Destructor
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*/
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~basic_sha512()
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{ ; }
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public:
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/**
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* Clear/reset all internal buffers and states.
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*/
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void clear()
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{
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sum_[0] = 0x6a09e667f3bcc908; sum_[1] = 0xbb67ae8584caa73b;
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sum_[2] = 0x3c6ef372fe94f82b; sum_[3] = 0xa54ff53a5f1d36f1;
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sum_[4] = 0x510e527fade682d1; sum_[5] = 0x9b05688c2b3e6c1f;
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sum_[6] = 0x1f83d9abfb41bd6b; sum_[7] = 0x5be0cd19137e2179;
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sz_ = 0; iterations_ = 0; memset(&block_, 0, sizeof(block_));
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}
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/**
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* Push new binary data into the internal buf_ and recalculate the checksum.
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* @param const void* data
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* @param size_t size
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*/
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void update(const void* data, size_t size)
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{
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unsigned nb, n, n_tail;
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const uint8_t *p;
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n = 128 - sz_;
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n_tail = size < n ? size : n;
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memcpy(&block_[sz_], data, n_tail);
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if (sz_ + size < 128) { sz_ += size; return; }
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n = size - n_tail;
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nb = n >> 7;
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p = (const uint8_t*) data + n_tail;
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transform(block_, 1);
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transform(p, nb);
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n_tail = n & 0x7f;
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memcpy(block_, &p[nb << 7], n_tail);
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sz_ = n_tail;
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iterations_ += (nb+1) << 7;
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}
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/**
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* Finanlise checksum, return hex string.
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* @return str_t
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*/
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str_t final_data()
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{
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#if (defined (BYTE_ORDER)) && (defined (BIG_ENDIAN)) && ((BYTE_ORDER == BIG_ENDIAN))
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#define U32_B(x,b) *((b)+0)=(uint8_t)((x)); *((b)+1)=(uint8_t)((x)>>8); \
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*((b)+2)=(uint8_t)((x)>>16); *((b)+3)=(uint8_t)((x)>>24);
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#else
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#define U32_B(x,b) *((b)+3)=(uint8_t)((x)); *((b)+2)=(uint8_t)((x)>>8); \
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*((b)+1)=(uint8_t)((x)>>16); *((b)+0)=(uint8_t)((x)>>24);
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#endif
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unsigned nb, n;
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uint64_t n_total;
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nb = 1 + ((0x80-17) < (sz_ & 0x7f));
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n_total = (iterations_ + sz_) << 3;
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n = nb << 7;
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memset(block_ + sz_, 0, n - sz_);
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block_[sz_] = 0x80;
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U32_B(n_total, block_ + n-4);
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transform(block_, nb);
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std::basic_stringstream<Char_Type> ss; // hex string
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for (unsigned i = 0; i < 8; ++i) {
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ss << std::hex << std::setfill('0') << std::setw(16) << (sum_[i]);
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}
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clear();
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return ss.str();
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#undef U32_B
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}
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public:
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/**
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* Calculates the SHA256 for a given string.
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* @param const str_t & s
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* @return str_t
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*/
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static str_t calculate(const str_t & s)
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{
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basic_sha512 r;
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r.update(s.data(), s.length());
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return r.final_data();
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}
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/**
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* Calculates the SHA256 for a given C-string.
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* @param const char* s
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* @return str_t
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*/
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static str_t calculate(const void* data, size_t size)
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{ basic_sha512 r; r.update(data, size); return r.final_data(); }
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/**
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* Calculates the SHA256 for a stream. Returns an empty string on error.
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* @param std::istream & is
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* @return str_t
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*/
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static str_t calculate(std::istream & is)
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{
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basic_sha512 r;
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char data[64];
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while(is.good() && is.read(data, sizeof(data)).good()) {
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r.update(data, sizeof(data));
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}
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if(!is.eof()) return str_t();
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if(is.gcount()) r.update(data, is.gcount());
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return r.final_data();
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}
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/**
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* Calculates the SHA256 checksum for a given file, either read binary or as text.
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* @param const str_t & path
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* @param bool binary = true
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* @return str_t
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*/
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static str_t file(const str_t & path, bool binary=true)
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{
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std::ifstream fs;
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fs.open(path.c_str(), binary ? (std::ios::in|std::ios::binary) : (std::ios::in));
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str_t s = calculate(fs);
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fs.close();
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return s;
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}
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private:
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/**
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* Performs the SHA256 transformation on a given block
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* @param uint32_t *block
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*/
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void transform(const uint8_t *data, size_t size)
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{
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#define SR(x, n) (x >> n)
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#define RR(x, n) ((x >> n) | (x << ((sizeof(x) << 3) - n)))
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#define RL(x, n) ((x << n) | (x >> ((sizeof(x) << 3) - n)))
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#define CH(x, y, z) ((x & y) ^ (~x & z))
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#define MJ(x, y, z) ((x & y) ^ (x & z) ^ (y & z))
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#define F1(x) (RR(x, 28) ^ RR(x, 34) ^ RR(x, 39))
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#define F2(x) (RR(x, 14) ^ RR(x, 18) ^ RR(x, 41))
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#define F3(x) (RR(x, 1) ^ RR(x, 8) ^ SR(x, 7))
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#define F4(x) (RR(x, 19) ^ RR(x, 61) ^ SR(x, 6))
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#if (defined (BYTE_ORDER)) && (defined (BIG_ENDIAN)) && ((BYTE_ORDER == BIG_ENDIAN))
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#define B_U64(b,x) *(x)=((uint64_t)*((b)+0))|((uint64_t)*((b)+1)<<8)|\
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((uint64_t)*((b)+2)<<16)|((uint64_t)*((b)+3)<<24)|((uint64_t)*((b)+4)<<32)|\
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((uint64_t)*((b)+5)<<40)|((uint64_t)*((b)+6)<<48)|((uint64_t)*((b)+7)<<56);
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#else
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#define B_U64(b,x) *(x)=((uint64_t)*((b)+7))|((uint64_t)*((b)+6)<<8)|\
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((uint64_t)*((b)+5)<<16)|((uint64_t)*((b)+4)<<24)|((uint64_t)*((b)+3)<<32)|\
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((uint64_t)*((b)+2)<<40)|((uint64_t)*((b)+1)<<48)|((uint64_t)*((b)+0)<<56);
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#endif
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uint64_t t, u, v[8], w[80];
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const uint8_t *tblock;
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unsigned j;
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for(unsigned i = 0; i < size; ++i) {
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tblock = data + (i << 7);
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for(j = 0; j < 16; ++j) B_U64(&tblock[j<<3], &w[j]);
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for(j = 16; j < 80; ++j) w[j] = F4(w[j-2]) + w[j-7] + F3(w[j-15]) + w[j-16];
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for(j = 0; j < 8; ++j) v[j] = sum_[j];
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for(j = 0; j < 80; ++j) {
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t = v[7] + F2(v[4]) + CH(v[4], v[5], v[6]) + lut_[j] + w[j];
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u = F1(v[0]) + MJ(v[0], v[1], v[2]); v[7] = v[6]; v[6] = v[5]; v[5] = v[4];
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v[4] = v[3] + t; v[3] = v[2]; v[2] = v[1]; v[1] = v[0]; v[0] = t + u;
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}
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for(j = 0; j < 8; ++j) sum_[j] += v[j];
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}
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#undef SR
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#undef RR
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#undef RL
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#undef CH
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#undef MJ
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#undef F1
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#undef F2
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#undef F3
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#undef F4
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#undef B_U64
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}
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private:
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uint64_t iterations_; // Number of iterations
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uint64_t sum_[8]; // Intermediate checksum buffer
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unsigned sz_; // Number of currently stored bytes in the block
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uint8_t block_[256];
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static const uint64_t lut_[80]; // Lookup table
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};
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template <typename CT>
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const uint64_t basic_sha512<CT>::lut_[80] = {
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0x428a2f98d728ae22, 0x7137449123ef65cd, 0xb5c0fbcfec4d3b2f, 0xe9b5dba58189dbbc,
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0x3956c25bf348b538, 0x59f111f1b605d019, 0x923f82a4af194f9b, 0xab1c5ed5da6d8118,
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0xd807aa98a3030242, 0x12835b0145706fbe, 0x243185be4ee4b28c, 0x550c7dc3d5ffb4e2,
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0x72be5d74f27b896f, 0x80deb1fe3b1696b1, 0x9bdc06a725c71235, 0xc19bf174cf692694,
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0xe49b69c19ef14ad2, 0xefbe4786384f25e3, 0x0fc19dc68b8cd5b5, 0x240ca1cc77ac9c65,
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0x2de92c6f592b0275, 0x4a7484aa6ea6e483, 0x5cb0a9dcbd41fbd4, 0x76f988da831153b5,
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0x983e5152ee66dfab, 0xa831c66d2db43210, 0xb00327c898fb213f, 0xbf597fc7beef0ee4,
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0xc6e00bf33da88fc2, 0xd5a79147930aa725, 0x06ca6351e003826f, 0x142929670a0e6e70,
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0x27b70a8546d22ffc, 0x2e1b21385c26c926, 0x4d2c6dfc5ac42aed, 0x53380d139d95b3df,
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0x650a73548baf63de, 0x766a0abb3c77b2a8, 0x81c2c92e47edaee6, 0x92722c851482353b,
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0xa2bfe8a14cf10364, 0xa81a664bbc423001, 0xc24b8b70d0f89791, 0xc76c51a30654be30,
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0xd192e819d6ef5218, 0xd69906245565a910, 0xf40e35855771202a, 0x106aa07032bbd1b8,
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0x19a4c116b8d2d0c8, 0x1e376c085141ab53, 0x2748774cdf8eeb99, 0x34b0bcb5e19b48a8,
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0x391c0cb3c5c95a63, 0x4ed8aa4ae3418acb, 0x5b9cca4f7763e373, 0x682e6ff3d6b2b8a3,
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0x748f82ee5defb2fc, 0x78a5636f43172f60, 0x84c87814a1f0ab72, 0x8cc702081a6439ec,
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0x90befffa23631e28, 0xa4506cebde82bde9, 0xbef9a3f7b2c67915, 0xc67178f2e372532b,
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0xca273eceea26619c, 0xd186b8c721c0c207, 0xeada7dd6cde0eb1e, 0xf57d4f7fee6ed178,
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0x06f067aa72176fba, 0x0a637dc5a2c898a6, 0x113f9804bef90dae, 0x1b710b35131c471b,
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0x28db77f523047d84, 0x32caab7b40c72493, 0x3c9ebe0a15c9bebc, 0x431d67c49c100d4c,
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0x4cc5d4becb3e42b6, 0x597f299cfc657e2a, 0x5fcb6fab3ad6faec, 0x6c44198c4a475817
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};
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}}
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namespace sw {
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typedef detail::basic_sha512<> sha512;
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}
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#endif |