224 lines
6.1 KiB
C++
224 lines
6.1 KiB
C++
/*
|
|
*
|
|
* TinySHA1 - a header only implementation of the SHA1 algorithm in C++. Based
|
|
* on the implementation in boost::uuid::details.
|
|
*
|
|
* SHA1 Wikipedia Page: http://en.wikipedia.org/wiki/SHA-1
|
|
*
|
|
* Copyright (c) 2012-22 SAURAV MOHAPATRA <mohaps@gmail.com>
|
|
*
|
|
* Permission to use, copy, modify, and distribute this software for any
|
|
* purpose with or without fee is hereby granted, provided that the above
|
|
* copyright notice and this permission notice appear in all copies.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
|
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
|
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
|
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
|
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
|
|
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
*
|
|
* Taken from https://github.com/mohaps/TinySHA1
|
|
* Modified for use by Xenia
|
|
*/
|
|
#ifndef _TINY_SHA1_HPP_
|
|
#define _TINY_SHA1_HPP_
|
|
|
|
#include <cstdio>
|
|
#include <cstdlib>
|
|
#include <cstring>
|
|
#include <stdint.h>
|
|
|
|
namespace sha1 {
|
|
class SHA1 {
|
|
public:
|
|
typedef uint32_t digest32_t[5];
|
|
typedef uint8_t digest8_t[20];
|
|
inline static uint32_t LeftRotate(uint32_t value, size_t count) {
|
|
return (value << count) ^ (value >> (32 - count));
|
|
}
|
|
SHA1() { reset(); }
|
|
virtual ~SHA1() {}
|
|
SHA1(const SHA1& s) { *this = s; }
|
|
const SHA1& operator=(const SHA1& s) {
|
|
memcpy(m_digest, s.m_digest, 5 * sizeof(uint32_t));
|
|
memcpy(m_block, s.m_block, 64);
|
|
m_blockByteIndex = s.m_blockByteIndex;
|
|
m_byteCount = s.m_byteCount;
|
|
|
|
return *this;
|
|
}
|
|
|
|
SHA1& init(const uint32_t digest[5], const uint8_t block[64],
|
|
uint32_t count) {
|
|
std::memcpy(m_digest, digest, 20);
|
|
std::memcpy(m_block, block, count % 64);
|
|
m_byteCount = count;
|
|
m_blockByteIndex = count % 64;
|
|
|
|
return *this;
|
|
}
|
|
|
|
const uint32_t* getDigest() const { return m_digest; }
|
|
const uint8_t* getBlock() const { return m_block; }
|
|
size_t getBlockByteIndex() const { return m_blockByteIndex; }
|
|
size_t getByteCount() const { return m_byteCount; }
|
|
|
|
SHA1& reset() {
|
|
m_digest[0] = 0x67452301;
|
|
m_digest[1] = 0xEFCDAB89;
|
|
m_digest[2] = 0x98BADCFE;
|
|
m_digest[3] = 0x10325476;
|
|
m_digest[4] = 0xC3D2E1F0;
|
|
m_blockByteIndex = 0;
|
|
m_byteCount = 0;
|
|
return *this;
|
|
}
|
|
|
|
SHA1& processByte(uint8_t octet) {
|
|
this->m_block[this->m_blockByteIndex++] = octet;
|
|
++this->m_byteCount;
|
|
if (m_blockByteIndex == 64) {
|
|
this->m_blockByteIndex = 0;
|
|
processBlock();
|
|
}
|
|
|
|
return *this;
|
|
}
|
|
|
|
SHA1& processBlock(const void* const start, const void* const end) {
|
|
const uint8_t* begin = static_cast<const uint8_t*>(start);
|
|
const uint8_t* finish = static_cast<const uint8_t*>(end);
|
|
while (begin != finish) {
|
|
processByte(*begin);
|
|
begin++;
|
|
}
|
|
return *this;
|
|
}
|
|
|
|
SHA1& processBytes(const void* const data, size_t len) {
|
|
const uint8_t* block = static_cast<const uint8_t*>(data);
|
|
processBlock(block, block + len);
|
|
return *this;
|
|
}
|
|
|
|
const uint32_t* finalize(digest32_t digest) {
|
|
size_t bitCount = this->m_byteCount * 8;
|
|
processByte(0x80);
|
|
if (this->m_blockByteIndex > 56) {
|
|
while (m_blockByteIndex != 0) {
|
|
processByte(0);
|
|
}
|
|
while (m_blockByteIndex < 56) {
|
|
processByte(0);
|
|
}
|
|
} else {
|
|
while (m_blockByteIndex < 56) {
|
|
processByte(0);
|
|
}
|
|
}
|
|
processByte(0);
|
|
processByte(0);
|
|
processByte(0);
|
|
processByte(0);
|
|
processByte(static_cast<unsigned char>((bitCount >> 24) & 0xFF));
|
|
processByte(static_cast<unsigned char>((bitCount >> 16) & 0xFF));
|
|
processByte(static_cast<unsigned char>((bitCount >> 8) & 0xFF));
|
|
processByte(static_cast<unsigned char>((bitCount)&0xFF));
|
|
|
|
memcpy(digest, m_digest, 5 * sizeof(uint32_t));
|
|
return digest;
|
|
}
|
|
|
|
const uint8_t* finalize(digest8_t digest) {
|
|
digest32_t d32;
|
|
finalize(d32);
|
|
size_t di = 0;
|
|
digest[di++] = ((d32[0] >> 24) & 0xFF);
|
|
digest[di++] = ((d32[0] >> 16) & 0xFF);
|
|
digest[di++] = ((d32[0] >> 8) & 0xFF);
|
|
digest[di++] = ((d32[0]) & 0xFF);
|
|
|
|
digest[di++] = ((d32[1] >> 24) & 0xFF);
|
|
digest[di++] = ((d32[1] >> 16) & 0xFF);
|
|
digest[di++] = ((d32[1] >> 8) & 0xFF);
|
|
digest[di++] = ((d32[1]) & 0xFF);
|
|
|
|
digest[di++] = ((d32[2] >> 24) & 0xFF);
|
|
digest[di++] = ((d32[2] >> 16) & 0xFF);
|
|
digest[di++] = ((d32[2] >> 8) & 0xFF);
|
|
digest[di++] = ((d32[2]) & 0xFF);
|
|
|
|
digest[di++] = ((d32[3] >> 24) & 0xFF);
|
|
digest[di++] = ((d32[3] >> 16) & 0xFF);
|
|
digest[di++] = ((d32[3] >> 8) & 0xFF);
|
|
digest[di++] = ((d32[3]) & 0xFF);
|
|
|
|
digest[di++] = ((d32[4] >> 24) & 0xFF);
|
|
digest[di++] = ((d32[4] >> 16) & 0xFF);
|
|
digest[di++] = ((d32[4] >> 8) & 0xFF);
|
|
digest[di++] = ((d32[4]) & 0xFF);
|
|
return digest;
|
|
}
|
|
|
|
protected:
|
|
void processBlock() {
|
|
uint32_t w[80];
|
|
for (size_t i = 0; i < 16; i++) {
|
|
w[i] = (m_block[i * 4 + 0] << 24);
|
|
w[i] |= (m_block[i * 4 + 1] << 16);
|
|
w[i] |= (m_block[i * 4 + 2] << 8);
|
|
w[i] |= (m_block[i * 4 + 3]);
|
|
}
|
|
for (size_t i = 16; i < 80; i++) {
|
|
w[i] = LeftRotate((w[i - 3] ^ w[i - 8] ^ w[i - 14] ^ w[i - 16]), 1);
|
|
}
|
|
|
|
uint32_t a = m_digest[0];
|
|
uint32_t b = m_digest[1];
|
|
uint32_t c = m_digest[2];
|
|
uint32_t d = m_digest[3];
|
|
uint32_t e = m_digest[4];
|
|
|
|
for (std::size_t i = 0; i < 80; ++i) {
|
|
uint32_t f = 0;
|
|
uint32_t k = 0;
|
|
|
|
if (i < 20) {
|
|
f = (b & c) | (~b & d);
|
|
k = 0x5A827999;
|
|
} else if (i < 40) {
|
|
f = b ^ c ^ d;
|
|
k = 0x6ED9EBA1;
|
|
} else if (i < 60) {
|
|
f = (b & c) | (b & d) | (c & d);
|
|
k = 0x8F1BBCDC;
|
|
} else {
|
|
f = b ^ c ^ d;
|
|
k = 0xCA62C1D6;
|
|
}
|
|
uint32_t temp = LeftRotate(a, 5) + f + e + k + w[i];
|
|
e = d;
|
|
d = c;
|
|
c = LeftRotate(b, 30);
|
|
b = a;
|
|
a = temp;
|
|
}
|
|
|
|
m_digest[0] += a;
|
|
m_digest[1] += b;
|
|
m_digest[2] += c;
|
|
m_digest[3] += d;
|
|
m_digest[4] += e;
|
|
}
|
|
|
|
private:
|
|
digest32_t m_digest;
|
|
uint8_t m_block[64];
|
|
size_t m_blockByteIndex;
|
|
size_t m_byteCount;
|
|
};
|
|
}
|
|
#endif
|