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OpenFPGA/libs/libvtrutil/src/picosha2.h

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/*
* The MIT License (MIT)
*
* Copyright (C) 2014 okdshin
*
* 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.
*/
#ifndef PICOSHA2_H
#define PICOSHA2_H
//picosha2:20140213
#include <iostream>
#include <vector>
#include <iterator>
#include <cassert>
#include <sstream>
#include <algorithm>
namespace picosha2 {
typedef unsigned long word_t;
typedef unsigned char byte_t;
namespace detail {
inline byte_t mask_8bit(byte_t x) {
return x & 0xff;
}
inline word_t mask_32bit(word_t x) {
return x & 0xffffffff;
}
const word_t add_constant[64] = {
0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5,
0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,
0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3,
0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,
0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc,
0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7,
0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967,
0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13,
0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,
0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3,
0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,
0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5,
0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3,
0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208,
0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2};
const word_t initial_message_digest[8] = {
0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a,
0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19};
inline word_t ch(word_t x, word_t y, word_t z) {
return (x & y) ^ ((~x) & z);
}
inline word_t maj(word_t x, word_t y, word_t z) {
return (x & y) ^ (x & z) ^ (y & z);
}
inline word_t rotr(word_t x, std::size_t n) {
assert(n < 32);
return mask_32bit((x >> n) | (x << (32 - n)));
}
inline word_t bsig0(word_t x) {
return rotr(x, 2) ^ rotr(x, 13) ^ rotr(x, 22);
}
inline word_t bsig1(word_t x) {
return rotr(x, 6) ^ rotr(x, 11) ^ rotr(x, 25);
}
inline word_t shr(word_t x, std::size_t n) {
assert(n < 32);
return x >> n;
}
inline word_t ssig0(word_t x) {
return rotr(x, 7) ^ rotr(x, 18) ^ shr(x, 3);
}
inline word_t ssig1(word_t x) {
return rotr(x, 17) ^ rotr(x, 19) ^ shr(x, 10);
}
template<typename RaIter1, typename RaIter2>
void hash256_block(RaIter1 message_digest, RaIter2 first, RaIter2 /*last*/) {
word_t w[64];
std::fill(w, w + 64, 0);
for (std::size_t i = 0; i < 16; ++i) {
w[i] = (static_cast<word_t>(mask_8bit(*(first + i * 4))) << 24)
| (static_cast<word_t>(mask_8bit(*(first + i * 4 + 1))) << 16)
| (static_cast<word_t>(mask_8bit(*(first + i * 4 + 2))) << 8)
| (static_cast<word_t>(mask_8bit(*(first + i * 4 + 3))));
}
for (std::size_t i = 16; i < 64; ++i) {
w[i] = mask_32bit(ssig1(w[i - 2]) + w[i - 7] + ssig0(w[i - 15]) + w[i - 16]);
}
word_t a = *message_digest;
word_t b = *(message_digest + 1);
word_t c = *(message_digest + 2);
word_t d = *(message_digest + 3);
word_t e = *(message_digest + 4);
word_t f = *(message_digest + 5);
word_t g = *(message_digest + 6);
word_t h = *(message_digest + 7);
for (std::size_t i = 0; i < 64; ++i) {
word_t temp1 = h + bsig1(e) + ch(e, f, g) + add_constant[i] + w[i];
word_t temp2 = bsig0(a) + maj(a, b, c);
h = g;
g = f;
f = e;
e = mask_32bit(d + temp1);
d = c;
c = b;
b = a;
a = mask_32bit(temp1 + temp2);
}
*message_digest += a;
*(message_digest + 1) += b;
*(message_digest + 2) += c;
*(message_digest + 3) += d;
*(message_digest + 4) += e;
*(message_digest + 5) += f;
*(message_digest + 6) += g;
*(message_digest + 7) += h;
for (std::size_t i = 0; i < 8; ++i) {
*(message_digest + i) = mask_32bit(*(message_digest + i));
}
}
} //namespace detail
template<typename InIter>
void output_hex(InIter first, InIter last, std::ostream& os) {
std::ios::fmtflags orig_flags = os.flags();
std::streamsize orig_width = os.width();
char orig_fill = os.fill();
os.setf(std::ios::hex, std::ios::basefield);
while (first != last) {
os.width(2);
os.fill('0');
os << static_cast<unsigned int>(*first);
++first;
}
os.flags(orig_flags);
os.fill(orig_fill);
os.width(orig_width);
}
template<typename InIter>
void bytes_to_hex_string(InIter first, InIter last, std::string& hex_str) {
std::ostringstream oss;
output_hex(first, last, oss);
hex_str.assign(oss.str());
}
template<typename InContainer>
void bytes_to_hex_string(const InContainer& bytes, std::string& hex_str) {
bytes_to_hex_string(bytes.begin(), bytes.end(), hex_str);
}
template<typename InIter>
std::string bytes_to_hex_string(InIter first, InIter last) {
std::string hex_str;
bytes_to_hex_string(first, last, hex_str);
return hex_str;
}
template<typename InContainer>
std::string bytes_to_hex_string(const InContainer& bytes) {
std::string hex_str;
bytes_to_hex_string(bytes, hex_str);
return hex_str;
}
class hash256_one_by_one {
public:
hash256_one_by_one() {
init();
}
void init() {
buffer_.clear();
std::fill(data_length_digits_, data_length_digits_ + 4, 0);
std::copy(detail::initial_message_digest, detail::initial_message_digest + 8, h_);
}
template<typename RaIter>
void process(RaIter first, RaIter last) {
add_to_data_length(std::distance(first, last));
std::copy(first, last, std::back_inserter(buffer_));
std::size_t i = 0;
for (; i + 64 <= buffer_.size(); i += 64) {
detail::hash256_block(h_, buffer_.begin() + i, buffer_.begin() + i + 64);
}
buffer_.erase(buffer_.begin(), buffer_.begin() + i);
}
void finish() {
byte_t temp[64];
std::fill(temp, temp + 64, 0);
std::size_t remains = buffer_.size();
std::copy(buffer_.begin(), buffer_.end(), temp);
temp[remains] = 0x80;
if (remains > 55) {
std::fill(temp + remains + 1, temp + 64, 0);
detail::hash256_block(h_, temp, temp + 64);
std::fill(temp, temp + 64 - 4, 0);
} else {
std::fill(temp + remains + 1, temp + 64 - 4, 0);
}
write_data_bit_length(&(temp[56]));
detail::hash256_block(h_, temp, temp + 64);
}
template<typename OutIter>
void get_hash_bytes(OutIter first, OutIter last) const {
for (const word_t* iter = h_; iter != h_ + 8; ++iter) {
for (std::size_t i = 0; i < 4 && first != last; ++i) {
*(first++) = detail::mask_8bit(static_cast<byte_t>((*iter >> (24 - 8 * i))));
}
}
}
private:
void add_to_data_length(word_t n) {
word_t carry = 0;
data_length_digits_[0] += n;
for (std::size_t i = 0; i < 4; ++i) {
data_length_digits_[i] += carry;
if (data_length_digits_[i] >= 65536u) {
carry = data_length_digits_[i] >> 16;
data_length_digits_[i] &= 65535u;
} else {
break;
}
}
}
void write_data_bit_length(byte_t* begin) {
word_t data_bit_length_digits[4];
std::copy(
data_length_digits_, data_length_digits_ + 4,
data_bit_length_digits);
// convert byte length to bit length (multiply 8 or shift 3 times left)
word_t carry = 0;
for (std::size_t i = 0; i < 4; ++i) {
word_t before_val = data_bit_length_digits[i];
data_bit_length_digits[i] <<= 3;
data_bit_length_digits[i] |= carry;
data_bit_length_digits[i] &= 65535u;
carry = (before_val >> (16 - 3)) & 65535u;
}
// write data_bit_length
for (int i = 3; i >= 0; --i) {
(*begin++) = static_cast<byte_t>(data_bit_length_digits[i] >> 8);
(*begin++) = static_cast<byte_t>(data_bit_length_digits[i]);
}
}
std::vector<byte_t> buffer_;
word_t data_length_digits_[4]; //as 64bit integer (16bit x 4 integer)
word_t h_[8];
};
inline void get_hash_hex_string(const hash256_one_by_one& hasher, std::string& hex_str) {
byte_t hash[32];
hasher.get_hash_bytes(hash, hash + 32);
return bytes_to_hex_string(hash, hash + 32, hex_str);
}
inline std::string get_hash_hex_string(const hash256_one_by_one& hasher) {
std::string hex_str;
get_hash_hex_string(hasher, hex_str);
return hex_str;
}
template<typename RaIter, typename OutIter>
void hash256(RaIter first, RaIter last, OutIter first2, OutIter last2) {
hash256_one_by_one hasher;
//hasher.init();
hasher.process(first, last);
hasher.finish();
hasher.get_hash_bytes(first2, last2);
}
template<typename RaIter, typename OutContainer>
void hash256(RaIter first, RaIter last, OutContainer& dst) {
hash256(first, last, dst.begin(), dst.end());
}
template<typename RaContainer, typename OutIter>
void hash256(const RaContainer& src, OutIter first, OutIter last) {
hash256(src.begin(), src.end(), first, last);
}
template<typename RaContainer, typename OutContainer>
void hash256(const RaContainer& src, OutContainer& dst) {
hash256(src.begin(), src.end(), dst.begin(), dst.end());
}
template<typename RaIter>
void hash256_hex_string(RaIter first, RaIter last, std::string& hex_str) {
byte_t hashed[32];
hash256(first, last, hashed, hashed + 32);
std::ostringstream oss;
output_hex(hashed, hashed + 32, oss);
hex_str.assign(oss.str());
}
template<typename RaIter>
std::string hash256_hex_string(RaIter first, RaIter last) {
std::string hex_str;
hash256_hex_string(first, last, hex_str);
return hex_str;
}
inline void hash256_hex_string(const std::string& src, std::string& hex_str) {
hash256_hex_string(src.begin(), src.end(), hex_str);
}
template<typename RaContainer>
void hash256_hex_string(const RaContainer& src, std::string& hex_str) {
hash256_hex_string(src.begin(), src.end(), hex_str);
}
template<typename RaContainer>
std::string hash256_hex_string(const RaContainer& src) {
return hash256_hex_string(src.begin(), src.end());
}
} //namespace picosha2
#endif //PICOSHA2_H
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