277 lines
7.6 KiB
Objective-C
277 lines
7.6 KiB
Objective-C
//
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// MGMSHA1.m
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// MGMMD
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//
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// Created by Mr. Gecko <GRMrGecko@gmail.com> on 8/23/10.
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// No Copyright Claimed. Public Domain.
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// C Algorithm created by Steve Reid <steve@edmweb.com>
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//
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#ifdef __NEXT_RUNTIME__
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#import "MGMSHA1.h"
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#import "MGMTypes.h"
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NSString * const MDNSHA1 = @"sha1";
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@implementation NSString (MGMSHA1)
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- (NSString *)SHA1 {
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NSData *MDData = [self dataUsingEncoding:NSUTF8StringEncoding];
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struct SHA1Context MDContext;
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unsigned char MDDigest[SHA1Length];
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SHA1Init(&MDContext);
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SHA1Update(&MDContext, [MDData bytes], [MDData length]);
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SHA1Final(MDDigest, &MDContext);
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char *stringBuffer = (char *)malloc(SHA1Length * 2 + 1);
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char *hexBuffer = stringBuffer;
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for (int i=0; i<SHA1Length; 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 *)pathSHA1 {
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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 SHA1Context MDContext;
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unsigned char MDDigest[SHA1Length];
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SHA1Init(&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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SHA1Update(&MDContext, [MDData bytes], length);
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[pool release];
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} while (length>0);
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SHA1Final(MDDigest, &MDContext);
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char *stringBuffer = (char *)malloc(SHA1Length * 2 + 1);
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char *hexBuffer = stringBuffer;
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for (int i=0; i<SHA1Length; 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 "MGMSHA1.h"
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#include "MGMTypes.h"
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#endif
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const struct MGMHashDescription SHA1Desc = {
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"sha1",
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sizeof(struct SHA1Context),
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(void(*)(void *))&SHA1Init,
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(void(*)(void *, const unsigned char *, unsigned))&SHA1Update,
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(void(*)(unsigned char *, void *))&SHA1Final,
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SHA1Length
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};
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char *SHA1String(const char *string, int length) {
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struct SHA1Context MDContext;
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unsigned char MDDigest[SHA1Length];
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SHA1Init(&MDContext);
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SHA1Update(&MDContext, (const unsigned char *)string, length);
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SHA1Final(MDDigest, &MDContext);
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char *stringBuffer = (char *)malloc(SHA1Length * 2 + 1);
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char *hexBuffer = stringBuffer;
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for (int i=0; i<SHA1Length; 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 *SHA1File(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 SHA1Context MDContext;
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unsigned char MDDigest[SHA1Length];
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SHA1Init(&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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SHA1Update(&MDContext, MDData, length);
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} while (length>0);
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SHA1Final(MDDigest, &MDContext);
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fclose(file);
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char *stringBuffer = (char *)malloc(SHA1Length * 2 + 1);
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char *hexBuffer = stringBuffer;
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for (int i=0; i<SHA1Length; 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 SHA1Init(struct SHA1Context *context) {
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context->state[0] = INT32(0x67452301);
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context->state[1] = INT32(0xEFCDAB89);
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context->state[2] = INT32(0x98BADCFE);
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context->state[3] = INT32(0x10325476);
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context->state[4] = INT32(0xC3D2E1F0);
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context->curlen = 0;
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context->length = 0;
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}
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void SHA1Update(struct SHA1Context *context, const unsigned char *buf, unsigned 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>=SHA1BufferSize) {
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SHA1Transform(context, (unsigned char *)buf);
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context->length += SHA1BufferSize * 8;
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buf += SHA1BufferSize;
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len -= SHA1BufferSize;
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} else {
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n = MIN(len, (SHA1BufferSize-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 == SHA1BufferSize) {
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SHA1Transform(context, context->buf);
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context->length += 8*SHA1BufferSize;
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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 SHA1Final(unsigned char digest[SHA1Length], struct SHA1Context *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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SHA1Transform(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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SHA1Transform(context, context->buf);
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for (int i=0; i<5; 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 SHA1Context));
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}
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#define SHA1_rol(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits))))
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#if BYTE_ORDER == LITTLE_ENDIAN
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#define SHA1_blk0(i) (block->l[i] = (SHA1_rol(block->l[i], 24)&INT32(0xFF00FF00)) |(SHA1_rol(block->l[i], 8)&INT32(0x00FF00FF)))
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#elif BYTE_ORDER == BIG_ENDIAN
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#define SHA1_blk0(i) block->l[i]
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#else
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#error "Endianness not defined!"
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#endif
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#define SHA1_blk(i) (block->l[i&15] = SHA1_rol(block->l[(i+13)&15]^block->l[(i+8)&15] ^block->l[(i+2)&15]^block->l[i&15], 1))
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#define SHA1_R0(v, w, x, y, z, i) z+=((w&(x^y))^y)+SHA1_blk0(i)+INT32(0x5A827999)+SHA1_rol(v, 5);w=SHA1_rol(w, 30);
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#define SHA1_R1(v, w, x, y, z, i) z+=((w&(x^y))^y)+SHA1_blk(i)+INT32(0x5A827999)+SHA1_rol(v, 5);w=SHA1_rol(w, 30);
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#define SHA1_R2(v, w, x, y, z, i) z+=(w^x^y)+SHA1_blk(i)+INT32(0x6ED9EBA1)+SHA1_rol(v, 5);w=SHA1_rol(w, 30);
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#define SHA1_R3(v, w, x, y, z, i) z+=(((w|x)&y)|(w&x))+SHA1_blk(i)+INT32(0x8F1BBCDC)+SHA1_rol(v, 5);w=SHA1_rol(w, 30);
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#define SHA1_R4(v, w, x, y, z, i) z+=(w^x^y)+SHA1_blk(i)+INT32(0xCA62C1D6)+SHA1_rol(v, 5);w=SHA1_rol(w, 30);
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#define SHA1STEP(v, w, x, y, z, i) \
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if (i<16) {SHA1_R0(v, w, x, y, z, i);} else \
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if (i<20) {SHA1_R1(v, w, x, y, z, i);} else \
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if (i<40) {SHA1_R2(v, w, x, y, z, i);} else \
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if (i<60) {SHA1_R3(v, w, x, y, z, i);} else \
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if (i<80) {SHA1_R4(v, w, x, y, z, i);}
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void SHA1Transform(struct SHA1Context *context, unsigned char *buf) {
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typedef union {
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char c[64];
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u_int32_t l[16];
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} SHA1LONG;
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SHA1LONG *block = (SHA1LONG *)buf;
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u_int32_t a = context->state[0];
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u_int32_t b = context->state[1];
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u_int32_t c = context->state[2];
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u_int32_t d = context->state[3];
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u_int32_t e = context->state[4];
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for (int i=0; i<79; i = i+5) {
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SHA1STEP(a, b, c, d, e, i);
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SHA1STEP(e, a, b, c, d, i + 1);
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SHA1STEP(d, e, a, b, c, i + 2);
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SHA1STEP(c, d, e, a, b, i + 3);
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SHA1STEP(b, c, d, e, a, i + 4);
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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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}
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int SHA1Test() {
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static const struct {
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char *msg;
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unsigned char hash[SHA1Length];
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} tests[] = {
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{
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"abc",
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{0xa9,0x99,0x3e,0x36,0x47,0x06,0x81,0x6a,0xba,0x3e,0x25,0x71,0x78,0x50,0xc2,0x6c,0x9c,0xd0,0xd8,0x9d}
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},
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{
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"abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq",
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{0x84,0x98,0x3E,0x44,0x1C,0x3B,0xD2,0x6E,0xBA,0xAE,0x4A,0xA1,0xF9,0x51,0x29,0xE5,0xE5,0x46,0x70,0xF1}
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},
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{NULL, {0}}
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};
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struct SHA1Context MDContext;
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unsigned char MDDigest[SHA1Length];
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for (int i=0; tests[i].msg!=NULL; i++) {
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SHA1Init(&MDContext);
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SHA1Update(&MDContext, (unsigned char *)tests[i].msg, (unsigned long)strlen(tests[i].msg));
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SHA1Final(MDDigest, &MDContext);
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if (memcmp(MDDigest, tests[i].hash, SHA1Length))
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return 0;
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}
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return 1;
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} |