296 lines
9.0 KiB
Objective-C
296 lines
9.0 KiB
Objective-C
//
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// MGMSHA256.m
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//
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// Created by Mr. Gecko <GRMrGecko@gmail.com> on 2/24/10.
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// No Copyright Claimed. Public Domain.
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// C Algorithm created by Tom St Denis <tomstdenis@gmail.com> <http://libtom.org>
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//
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#ifdef __NEXT_RUNTIME__
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#import "MGMSHA256.h"
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#import "MGMTypes.h"
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NSString * const MDNSHA256 = @"sha256";
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@implementation NSString (MGMSHA256)
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- (NSString *)SHA256 {
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NSData *MDData = [self dataUsingEncoding:NSUTF8StringEncoding];
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struct SHA256Context MDContext;
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unsigned char MDDigest[SHA256Length];
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SHA256Init(&MDContext);
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SHA256Update(&MDContext, [MDData bytes], [MDData length]);
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SHA256Final(MDDigest, &MDContext);
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char *stringBuffer = (char *)malloc(SHA256Length * 2 + 1);
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char *hexBuffer = stringBuffer;
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for (int i=0; i<SHA256Length; i++) {
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*hexBuffer++ = hexdigits[(MDDigest[i] >> 4) & 0xF];
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*hexBuffer++ = hexdigits[MDDigest[i] & 0xF];
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}
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*hexBuffer = '\0';
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NSString *hash = [NSString stringWithUTF8String:stringBuffer];
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free(stringBuffer);
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return hash;
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}
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- (NSString *)pathSHA256 {
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NSFileHandle *file = [NSFileHandle fileHandleForReadingAtPath:self];
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if (file==nil)
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return nil;
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struct SHA256Context MDContext;
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unsigned char MDDigest[SHA256Length];
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SHA256Init(&MDContext);
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int length;
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do {
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NSAutoreleasePool *pool = [NSAutoreleasePool new];
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NSData *MDData = [file readDataOfLength:MDFileReadLength];
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length = [MDData length];
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SHA256Update(&MDContext, [MDData bytes], length);
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[pool release];
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} while (length>0);
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SHA256Final(MDDigest, &MDContext);
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char *stringBuffer = (char *)malloc(SHA256Length * 2 + 1);
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char *hexBuffer = stringBuffer;
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for (int i=0; i<SHA256Length; i++) {
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*hexBuffer++ = hexdigits[(MDDigest[i] >> 4) & 0xF];
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*hexBuffer++ = hexdigits[MDDigest[i] & 0xF];
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}
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*hexBuffer = '\0';
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NSString *hash = [NSString stringWithUTF8String:stringBuffer];
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free(stringBuffer);
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return hash;
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}
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@end
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#else
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#include <stdio.h>
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#include <string.h>
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#include "MGMSHA256.h"
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#include "MGMTypes.h"
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#endif
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const struct MGMHashDescription SHA256Desc = {
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"sha256",
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sizeof(struct SHA256Context),
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(void(*)(void *))&SHA256Init,
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(void(*)(void *, const unsigned char *, unsigned))&SHA256Update,
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(void(*)(unsigned char *, void *))&SHA256Final,
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SHA256Length
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};
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char *SHA256String(const char *string, int length) {
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struct SHA256Context MDContext;
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unsigned char MDDigest[SHA256Length];
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SHA256Init(&MDContext);
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SHA256Update(&MDContext, (const unsigned char *)string, length);
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SHA256Final(MDDigest, &MDContext);
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char *stringBuffer = (char *)malloc(SHA256Length * 2 + 1);
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char *hexBuffer = stringBuffer;
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for (int i=0; i<SHA256Length; i++) {
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*hexBuffer++ = hexdigits[(MDDigest[i] >> 4) & 0xF];
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*hexBuffer++ = hexdigits[MDDigest[i] & 0xF];
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}
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*hexBuffer = '\0';
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return stringBuffer;
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}
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char *SHA256File(const char *path) {
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FILE *file = fopen(path, "r");
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if (file==NULL)
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return NULL;
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struct SHA256Context MDContext;
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unsigned char MDDigest[SHA256Length];
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SHA256Init(&MDContext);
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int length;
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do {
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unsigned char MDData[MDFileReadLength];
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length = fread(&MDData, 1, MDFileReadLength, file);
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SHA256Update(&MDContext, MDData, length);
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} while (length>0);
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SHA256Final(MDDigest, &MDContext);
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fclose(file);
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char *stringBuffer = (char *)malloc(SHA256Length * 2 + 1);
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char *hexBuffer = stringBuffer;
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for (int i=0; i<SHA256Length; i++) {
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*hexBuffer++ = hexdigits[(MDDigest[i] >> 4) & 0xF];
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*hexBuffer++ = hexdigits[MDDigest[i] & 0xF];
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}
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*hexBuffer = '\0';
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return stringBuffer;
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}
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void SHA256Init(struct SHA256Context *context) {
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context->state[0] = INT32(0x6a09e667);
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context->state[1] = INT32(0xbb67ae85);
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context->state[2] = INT32(0x3c6ef372);
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context->state[3] = INT32(0xa54ff53a);
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context->state[4] = INT32(0x510e527f);
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context->state[5] = INT32(0x9b05688c);
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context->state[6] = INT32(0x1f83d9ab);
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context->state[7] = INT32(0x5be0cd19);
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context->curlen = 0;
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context->length = 0;
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}
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void SHA256Update(struct SHA256Context *context, const unsigned char *buf, unsigned int len) {
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if (buf==NULL)
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return;
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unsigned long n;
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while (len>0) {
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if (context->curlen == 0 && len>=SHA256BufferSize) {
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SHA256Transform(context, (unsigned char *)buf);
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context->length += SHA256BufferSize * 8;
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buf += SHA256BufferSize;
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len -= SHA256BufferSize;
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} else {
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n = MIN(len, (SHA256BufferSize-context->curlen));
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memcpy(context->buf+context->curlen, buf, (size_t)n);
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context->curlen += n;
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buf += n;
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len -= n;
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if (context->curlen == SHA256BufferSize) {
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SHA256Transform(context, context->buf);
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context->length += 8*SHA256BufferSize;
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context->curlen = 0;
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}
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}
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}
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}
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void SHA256Final(unsigned char digest[SHA256Length], struct SHA256Context *context) {
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context->length += context->curlen * 8;
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context->buf[context->curlen++] = (unsigned char)0x80;
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if (context->curlen > 56) {
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while (context->curlen < 64) {
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context->buf[context->curlen++] = (unsigned char)0;
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}
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SHA256Transform(context, context->buf);
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context->curlen = 0;
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}
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while (context->curlen < 56) {
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context->buf[context->curlen++] = (unsigned char)0;
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}
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putu64(context->length, context->buf+56);
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SHA256Transform(context, context->buf);
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for (int i=0; i<8; i++) {
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putu32(context->state[i], digest+(4*i));
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}
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memset(context, 0, sizeof(struct SHA256Context));
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}
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/* #define SHA256_F1(x, y, z) (x & y | ~x & z) */
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#define SHA256_F1(x,y,z) (z ^ (x & (y ^ z)))
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#define SHA256_F2(x,y,z) (((x | y) & z) | (x & y))
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// SUM0
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#define SHA256_F3(x) (ROR32(x, 2) ^ ROR32(x, 13) ^ ROR32(x, 22))
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// SUM1
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#define SHA256_F4(x) (ROR32(x, 6) ^ ROR32(x, 11) ^ ROR32(x, 25))
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// OM0
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#define SHA256_F5(x) (ROR32(x, 7) ^ ROR32(x, 18) ^ SHR(x, 3))
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// OM1
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#define SHA256_F6(x) (ROR32(x, 17) ^ ROR32(x, 19) ^ SHR(x, 10))
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static const uint32_t SHA256_Key[64] = {
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INT32(0x428a2f98), INT32(0x71374491), INT32(0xb5c0fbcf), INT32(0xe9b5dba5), INT32(0x3956c25b), INT32(0x59f111f1), INT32(0x923f82a4), INT32(0xab1c5ed5),
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INT32(0xd807aa98), INT32(0x12835b01), INT32(0x243185be), INT32(0x550c7dc3), INT32(0x72be5d74), INT32(0x80deb1fe), INT32(0x9bdc06a7), INT32(0xc19bf174),
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INT32(0xe49b69c1), INT32(0xefbe4786), INT32(0x0fc19dc6), INT32(0x240ca1cc), INT32(0x2de92c6f), INT32(0x4a7484aa), INT32(0x5cb0a9dc), INT32(0x76f988da),
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INT32(0x983e5152), INT32(0xa831c66d), INT32(0xb00327c8), INT32(0xbf597fc7), INT32(0xc6e00bf3), INT32(0xd5a79147), INT32(0x06ca6351), INT32(0x14292967),
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INT32(0x27b70a85), INT32(0x2e1b2138), INT32(0x4d2c6dfc), INT32(0x53380d13), INT32(0x650a7354), INT32(0x766a0abb), INT32(0x81c2c92e), INT32(0x92722c85),
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INT32(0xa2bfe8a1), INT32(0xa81a664b), INT32(0xc24b8b70), INT32(0xc76c51a3), INT32(0xd192e819), INT32(0xd6990624), INT32(0xf40e3585), INT32(0x106aa070),
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INT32(0x19a4c116), INT32(0x1e376c08), INT32(0x2748774c), INT32(0x34b0bcb5), INT32(0x391c0cb3), INT32(0x4ed8aa4a), INT32(0x5b9cca4f), INT32(0x682e6ff3),
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INT32(0x748f82ee), INT32(0x78a5636f), INT32(0x84c87814), INT32(0x8cc70208), INT32(0x90befffa), INT32(0xa4506ceb), INT32(0xbef9a3f7), INT32(0xc67178f2)
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};
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#define SHA256STEP(a, b, c, d, e, f, g, h, s) \
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t1 = h + SHA256_F4(e) + SHA256_F1(e, f, g) + SHA256_Key[s] + x[s]; \
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t2 = SHA256_F3(a) + SHA256_F2(a, b, c); \
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d += t1; \
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h = t1 + t2;
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void SHA256Transform(struct SHA256Context *context, unsigned char *buf) {
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uint32_t x[64], t1, t2;
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int i;
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uint32_t a = context->state[0];
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uint32_t b = context->state[1];
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uint32_t c = context->state[2];
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uint32_t d = context->state[3];
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uint32_t e = context->state[4];
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uint32_t f = context->state[5];
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uint32_t g = context->state[6];
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uint32_t h = context->state[7];
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for (i = 0; i < 16; i++)
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x[i] = getu32(buf+(4*i));
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for (i = 16; i < 64; i++)
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x[i] = SHA256_F6(x[i - 2]) + x[i - 7] + SHA256_F5(x[i - 15]) + x[i - 16];
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for (int i=0; i<64; i = i + 8) {
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SHA256STEP(a, b, c, d, e, f, g, h, i);
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SHA256STEP(h, a, b, c, d, e, f, g, i + 1);
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SHA256STEP(g, h, a, b, c, d, e, f, i + 2);
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SHA256STEP(f, g, h, a, b, c, d, e, i + 3);
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SHA256STEP(e, f, g, h, a, b, c, d, i + 4);
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SHA256STEP(d, e, f, g, h, a, b, c, i + 5);
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SHA256STEP(c, d, e, f, g, h, a, b, i + 6);
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SHA256STEP(b, c, d, e, f, g, h, a, i + 7);
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}
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context->state[0] += a;
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context->state[1] += b;
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context->state[2] += c;
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context->state[3] += d;
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context->state[4] += e;
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context->state[5] += f;
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context->state[6] += g;
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context->state[7] += h;
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}
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int SHA256Test() {
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static const struct {
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char *msg;
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unsigned char hash[SHA256Length];
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} tests[] = {
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{
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"abc",
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{0xba,0x78,0x16,0xbf,0x8f,0x01,0xcf,0xea,0x41,0x41,0x40,0xde,0x5d,0xae,0x22,0x23,0xb0,0x03,0x61,0xa3,0x96,0x17,0x7a,0x9c,0xb4,0x10,0xff,0x61,0xf2,0x00,0x15,0xad}
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},
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{
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"abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq",
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{0x24,0x8d,0x6a,0x61,0xd2,0x06,0x38,0xb8,0xe5,0xc0,0x26,0x93,0x0c,0x3e,0x60,0x39,0xa3,0x3c,0xe4,0x59,0x64,0xff,0x21,0x67,0xf6,0xec,0xed,0xd4,0x19,0xdb,0x06,0xc1}
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},
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{NULL, {0}}
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};
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struct SHA256Context MDContext;
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unsigned char MDDigest[SHA256Length];
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for (int i=0; tests[i].msg!=NULL; i++) {
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SHA256Init(&MDContext);
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SHA256Update(&MDContext, (unsigned char *)tests[i].msg, (unsigned long)strlen(tests[i].msg));
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SHA256Final(MDDigest, &MDContext);
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if (memcmp(MDDigest, tests[i].hash, SHA256Length))
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return 0;
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}
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return 1;
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} |