Gav Wood
11 years ago
3 changed files with 231 additions and 1 deletions
@ -0,0 +1,171 @@ |
|||||
|
/*
|
||||
|
* Updated to C++, zedwood.com 2012 |
||||
|
* Based on Olivier Gay's version |
||||
|
* See Modified BSD License below: |
||||
|
* |
||||
|
* FIPS 180-2 SHA-224/256/384/512 implementation |
||||
|
* Issue date: 04/30/2005 |
||||
|
* http://www.ouah.org/ogay/sha2/
|
||||
|
* |
||||
|
* Copyright (C) 2005, 2007 Olivier Gay <olivier.gay@a3.epfl.ch> |
||||
|
* All rights reserved. |
||||
|
* |
||||
|
* Redistribution and use in source and binary forms, with or without |
||||
|
* modification, are permitted provided that the following conditions |
||||
|
* are met: |
||||
|
* 1. Redistributions of source code must retain the above copyright |
||||
|
* notice, this list of conditions and the following disclaimer. |
||||
|
* 2. Redistributions in binary form must reproduce the above copyright |
||||
|
* notice, this list of conditions and the following disclaimer in the |
||||
|
* documentation and/or other materials provided with the distribution. |
||||
|
* 3. Neither the name of the project nor the names of its contributors |
||||
|
* may be used to endorse or promote products derived from this software |
||||
|
* without specific prior written permission. |
||||
|
* |
||||
|
* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND |
||||
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
||||
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
||||
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE |
||||
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
||||
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
||||
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
||||
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
||||
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
||||
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
||||
|
* SUCH DAMAGE. |
||||
|
*/ |
||||
|
|
||||
|
#include <cstring> |
||||
|
#include <fstream> |
||||
|
#include "sha256.h" |
||||
|
using namespace std; |
||||
|
using namespace eth; |
||||
|
|
||||
|
const unsigned long SHA256::sha256_k[64] = //UL = uint32
|
||||
|
{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}; |
||||
|
|
||||
|
void SHA256::transform(const unsigned char *message, unsigned int block_nb) |
||||
|
{ |
||||
|
uint32 w[64]; |
||||
|
uint32 wv[8]; |
||||
|
uint32 t1, t2; |
||||
|
const unsigned char *sub_block; |
||||
|
int i; |
||||
|
int j; |
||||
|
for (i = 0; i < (int) block_nb; i++) { |
||||
|
sub_block = message + (i << 6); |
||||
|
for (j = 0; j < 16; j++) { |
||||
|
SHA2_PACK32(&sub_block[j << 2], &w[j]); |
||||
|
} |
||||
|
for (j = 16; j < 64; j++) { |
||||
|
w[j] = SHA256_F4(w[j - 2]) + w[j - 7] + SHA256_F3(w[j - 15]) + w[j - 16]; |
||||
|
} |
||||
|
for (j = 0; j < 8; j++) { |
||||
|
wv[j] = m_h[j]; |
||||
|
} |
||||
|
for (j = 0; j < 64; j++) { |
||||
|
t1 = wv[7] + SHA256_F2(wv[4]) + SHA2_CH(wv[4], wv[5], wv[6]) |
||||
|
+ sha256_k[j] + w[j]; |
||||
|
t2 = SHA256_F1(wv[0]) + SHA2_MAJ(wv[0], wv[1], wv[2]); |
||||
|
wv[7] = wv[6]; |
||||
|
wv[6] = wv[5]; |
||||
|
wv[5] = wv[4]; |
||||
|
wv[4] = wv[3] + t1; |
||||
|
wv[3] = wv[2]; |
||||
|
wv[2] = wv[1]; |
||||
|
wv[1] = wv[0]; |
||||
|
wv[0] = t1 + t2; |
||||
|
} |
||||
|
for (j = 0; j < 8; j++) { |
||||
|
m_h[j] += wv[j]; |
||||
|
} |
||||
|
} |
||||
|
} |
||||
|
|
||||
|
void SHA256::init() |
||||
|
{ |
||||
|
m_h[0] = 0x6a09e667; |
||||
|
m_h[1] = 0xbb67ae85; |
||||
|
m_h[2] = 0x3c6ef372; |
||||
|
m_h[3] = 0xa54ff53a; |
||||
|
m_h[4] = 0x510e527f; |
||||
|
m_h[5] = 0x9b05688c; |
||||
|
m_h[6] = 0x1f83d9ab; |
||||
|
m_h[7] = 0x5be0cd19; |
||||
|
m_len = 0; |
||||
|
m_tot_len = 0; |
||||
|
} |
||||
|
|
||||
|
void SHA256::update(const unsigned char *message, unsigned int len) |
||||
|
{ |
||||
|
unsigned int block_nb; |
||||
|
unsigned int new_len, rem_len, tmp_len; |
||||
|
const unsigned char *shifted_message; |
||||
|
tmp_len = SHA224_256_BLOCK_SIZE - m_len; |
||||
|
rem_len = len < tmp_len ? len : tmp_len; |
||||
|
memcpy(&m_block[m_len], message, rem_len); |
||||
|
if (m_len + len < SHA224_256_BLOCK_SIZE) { |
||||
|
m_len += len; |
||||
|
return; |
||||
|
} |
||||
|
new_len = len - rem_len; |
||||
|
block_nb = new_len / SHA224_256_BLOCK_SIZE; |
||||
|
shifted_message = message + rem_len; |
||||
|
transform(m_block, 1); |
||||
|
transform(shifted_message, block_nb); |
||||
|
rem_len = new_len % SHA224_256_BLOCK_SIZE; |
||||
|
memcpy(m_block, &shifted_message[block_nb << 6], rem_len); |
||||
|
m_len = rem_len; |
||||
|
m_tot_len += (block_nb + 1) << 6; |
||||
|
} |
||||
|
|
||||
|
void SHA256::final(unsigned char *digest) |
||||
|
{ |
||||
|
unsigned int block_nb; |
||||
|
unsigned int pm_len; |
||||
|
unsigned int len_b; |
||||
|
int i; |
||||
|
block_nb = (1 + ((SHA224_256_BLOCK_SIZE - 9) |
||||
|
< (m_len % SHA224_256_BLOCK_SIZE))); |
||||
|
len_b = (m_tot_len + m_len) << 3; |
||||
|
pm_len = block_nb << 6; |
||||
|
memset(m_block + m_len, 0, pm_len - m_len); |
||||
|
m_block[m_len] = 0x80; |
||||
|
SHA2_UNPACK32(len_b, m_block + pm_len - 4); |
||||
|
transform(m_block, block_nb); |
||||
|
for (i = 0 ; i < 8; i++) { |
||||
|
SHA2_UNPACK32(m_h[i], &digest[i << 2]); |
||||
|
} |
||||
|
} |
||||
|
|
||||
|
std::string sha256(std::string input) |
||||
|
{ |
||||
|
unsigned char digest[SHA256::DIGEST_SIZE]; |
||||
|
memset(digest,0,SHA256::DIGEST_SIZE); |
||||
|
|
||||
|
SHA256 ctx = SHA256(); |
||||
|
ctx.init(); |
||||
|
ctx.update( (unsigned char*)input.c_str(), input.length()); |
||||
|
ctx.final(digest); |
||||
|
|
||||
|
char buf[2*SHA256::DIGEST_SIZE+1]; |
||||
|
buf[2*SHA256::DIGEST_SIZE] = 0; |
||||
|
for (unsigned int i = 0; i < SHA256::DIGEST_SIZE; i++) |
||||
|
sprintf(buf+i*2, "%02x", digest[i]); |
||||
|
return std::string(buf); |
||||
|
} |
||||
@ -0,0 +1,59 @@ |
|||||
|
#pragma once |
||||
|
|
||||
|
#include <string> |
||||
|
|
||||
|
namespace eth |
||||
|
{ |
||||
|
|
||||
|
class SHA256 |
||||
|
{ |
||||
|
protected: |
||||
|
typedef unsigned char uint8; |
||||
|
typedef unsigned long uint32; |
||||
|
typedef unsigned long long uint64; |
||||
|
|
||||
|
const static uint32 sha256_k[]; |
||||
|
static const unsigned int SHA224_256_BLOCK_SIZE = (512/8); |
||||
|
public: |
||||
|
void init(); |
||||
|
void update(const unsigned char *message, unsigned int len); |
||||
|
void final(unsigned char *digest); |
||||
|
static const unsigned int DIGEST_SIZE = ( 256 / 8); |
||||
|
|
||||
|
protected: |
||||
|
void transform(const unsigned char *message, unsigned int block_nb); |
||||
|
unsigned int m_tot_len; |
||||
|
unsigned int m_len; |
||||
|
unsigned char m_block[2*SHA224_256_BLOCK_SIZE]; |
||||
|
uint32 m_h[8]; |
||||
|
}; |
||||
|
|
||||
|
std::string sha256(std::string input); |
||||
|
|
||||
|
#define SHA2_SHFR(x, n) (x >> n) |
||||
|
#define SHA2_ROTR(x, n) ((x >> n) | (x << ((sizeof(x) << 3) - n))) |
||||
|
#define SHA2_ROTL(x, n) ((x << n) | (x >> ((sizeof(x) << 3) - n))) |
||||
|
#define SHA2_CH(x, y, z) ((x & y) ^ (~x & z)) |
||||
|
#define SHA2_MAJ(x, y, z) ((x & y) ^ (x & z) ^ (y & z)) |
||||
|
#define SHA256_F1(x) (SHA2_ROTR(x, 2) ^ SHA2_ROTR(x, 13) ^ SHA2_ROTR(x, 22)) |
||||
|
#define SHA256_F2(x) (SHA2_ROTR(x, 6) ^ SHA2_ROTR(x, 11) ^ SHA2_ROTR(x, 25)) |
||||
|
#define SHA256_F3(x) (SHA2_ROTR(x, 7) ^ SHA2_ROTR(x, 18) ^ SHA2_SHFR(x, 3)) |
||||
|
#define SHA256_F4(x) (SHA2_ROTR(x, 17) ^ SHA2_ROTR(x, 19) ^ SHA2_SHFR(x, 10)) |
||||
|
#define SHA2_UNPACK32(x, str) \ |
||||
|
{ \ |
||||
|
*((str) + 3) = (uint8) ((x) ); \ |
||||
|
*((str) + 2) = (uint8) ((x) >> 8); \ |
||||
|
*((str) + 1) = (uint8) ((x) >> 16); \ |
||||
|
*((str) + 0) = (uint8) ((x) >> 24); \ |
||||
|
} |
||||
|
#define SHA2_PACK32(str, x) \ |
||||
|
{ \ |
||||
|
*(x) = ((uint32) *((str) + 3) ) \ |
||||
|
| ((uint32) *((str) + 2) << 8) \ |
||||
|
| ((uint32) *((str) + 1) << 16) \ |
||||
|
| ((uint32) *((str) + 0) << 24); \ |
||||
|
} |
||||
|
|
||||
|
} |
||||
|
|
||||
|
|
||||
Loading…
Reference in new issue