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/* coding: UTF-8 */
/* $Id: sha1.c,v 1.4 2007-07-20 23:00:50 wojtekka Exp $ */
/*
* (C) Copyright 2007 Wojtek Kaniewski <wojtekka@irc.pl>
*
* Public domain SHA-1 implementation by Steve Reid <steve@edmweb.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License Version
* 2.1 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307,
* USA.
*/
/**
* \file sha1.c
*
* \brief Funkcje wyznaczania skrĂłtu SHA1
*/
#include <string.h>
#include <sys/types.h>
#ifdef _WIN32
#include "win32.h"
#else
#include <unistd.h>
#endif
#include "libgadu.h"
/** \cond ignore */
#if defined(GG_CONFIG_HAVE_OPENSSL) && !defined(GG_CONFIG_MIRANDA)
#include <openssl/sha.h>
#else
/*
SHA-1 in C
By Steve Reid <steve@edmweb.com>
100% Public Domain
Modified by Wojtek Kaniewski <wojtekka@toxygen.net> for compatibility
with libgadu and OpenSSL API.
Test Vectors (from FIPS PUB 180-1)
"abc"
A9993E36 4706816A BA3E2571 7850C26C 9CD0D89D
"abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq"
84983E44 1C3BD26E BAAE4AA1 F95129E5 E54670F1
A million repetitions of "a"
34AA973C D4C4DAA4 F61EEB2B DBAD2731 6534016F
*/
/* #define LITTLE_ENDIAN * This should be #define'd if true. */
/* #define SHA1HANDSOFF * Copies data before messing with it. */
#include <string.h>
typedef struct {
uint32_t state[5];
uint32_t count[2];
unsigned char buffer[64];
} SHA_CTX;
static void SHA1_Transform(uint32_t state[5], const unsigned char buffer[64]);
static void SHA1_Init(SHA_CTX* context);
static void SHA1_Update(SHA_CTX* context, const unsigned char* data, unsigned int len);
static void SHA1_Final(unsigned char digest[20], SHA_CTX* context);
#define rol(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits))))
/* blk0() and blk() perform the initial expand. */
/* I got the idea of expanding during the round function from SSLeay */
#ifndef GG_CONFIG_BIGENDIAN
#define blk0(i) (block->l[i] = (rol(block->l[i],24)&0xFF00FF00) \
|(rol(block->l[i],8)&0x00FF00FF))
#else
#define blk0(i) block->l[i]
#endif
#define blk(i) (block->l[i&15] = rol(block->l[(i+13)&15]^block->l[(i+8)&15] \
^block->l[(i+2)&15]^block->l[i&15],1))
/* (R0+R1), R2, R3, R4 are the different operations used in SHA1 */
#define R0(v,w,x,y,z,i) z+=((w&(x^y))^y)+blk0(i)+0x5A827999+rol(v,5);w=rol(w,30);
#define R1(v,w,x,y,z,i) z+=((w&(x^y))^y)+blk(i)+0x5A827999+rol(v,5);w=rol(w,30);
#define R2(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0x6ED9EBA1+rol(v,5);w=rol(w,30);
#define R3(v,w,x,y,z,i) z+=(((w|x)&y)|(w&x))+blk(i)+0x8F1BBCDC+rol(v,5);w=rol(w,30);
#define R4(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0xCA62C1D6+rol(v,5);w=rol(w,30);
/* Hash a single 512-bit block. This is the core of the algorithm. */
static void SHA1_Transform(uint32_t state[5], const unsigned char buffer[64])
{
uint32_t a, b, c, d, e;
typedef union {
unsigned char c[64];
uint32_t l[16];
} CHAR64LONG16;
CHAR64LONG16* block;
static unsigned char workspace[64];
block = (CHAR64LONG16*)workspace;
memcpy(block, buffer, 64);
/* Copy context->state[] to working vars */
a = state[0];
b = state[1];
c = state[2];
d = state[3];
e = state[4];
/* 4 rounds of 20 operations each. Loop unrolled. */
R0(a,b,c,d,e, 0); R0(e,a,b,c,d, 1); R0(d,e,a,b,c, 2); R0(c,d,e,a,b, 3);
R0(b,c,d,e,a, 4); R0(a,b,c,d,e, 5); R0(e,a,b,c,d, 6); R0(d,e,a,b,c, 7);
R0(c,d,e,a,b, 8); R0(b,c,d,e,a, 9); R0(a,b,c,d,e,10); R0(e,a,b,c,d,11);
R0(d,e,a,b,c,12); R0(c,d,e,a,b,13); R0(b,c,d,e,a,14); R0(a,b,c,d,e,15);
R1(e,a,b,c,d,16); R1(d,e,a,b,c,17); R1(c,d,e,a,b,18); R1(b,c,d,e,a,19);
R2(a,b,c,d,e,20); R2(e,a,b,c,d,21); R2(d,e,a,b,c,22); R2(c,d,e,a,b,23);
R2(b,c,d,e,a,24); R2(a,b,c,d,e,25); R2(e,a,b,c,d,26); R2(d,e,a,b,c,27);
R2(c,d,e,a,b,28); R2(b,c,d,e,a,29); R2(a,b,c,d,e,30); R2(e,a,b,c,d,31);
R2(d,e,a,b,c,32); R2(c,d,e,a,b,33); R2(b,c,d,e,a,34); R2(a,b,c,d,e,35);
R2(e,a,b,c,d,36); R2(d,e,a,b,c,37); R2(c,d,e,a,b,38); R2(b,c,d,e,a,39);
R3(a,b,c,d,e,40); R3(e,a,b,c,d,41); R3(d,e,a,b,c,42); R3(c,d,e,a,b,43);
R3(b,c,d,e,a,44); R3(a,b,c,d,e,45); R3(e,a,b,c,d,46); R3(d,e,a,b,c,47);
R3(c,d,e,a,b,48); R3(b,c,d,e,a,49); R3(a,b,c,d,e,50); R3(e,a,b,c,d,51);
R3(d,e,a,b,c,52); R3(c,d,e,a,b,53); R3(b,c,d,e,a,54); R3(a,b,c,d,e,55);
R3(e,a,b,c,d,56); R3(d,e,a,b,c,57); R3(c,d,e,a,b,58); R3(b,c,d,e,a,59);
R4(a,b,c,d,e,60); R4(e,a,b,c,d,61); R4(d,e,a,b,c,62); R4(c,d,e,a,b,63);
R4(b,c,d,e,a,64); R4(a,b,c,d,e,65); R4(e,a,b,c,d,66); R4(d,e,a,b,c,67);
R4(c,d,e,a,b,68); R4(b,c,d,e,a,69); R4(a,b,c,d,e,70); R4(e,a,b,c,d,71);
R4(d,e,a,b,c,72); R4(c,d,e,a,b,73); R4(b,c,d,e,a,74); R4(a,b,c,d,e,75);
R4(e,a,b,c,d,76); R4(d,e,a,b,c,77); R4(c,d,e,a,b,78); R4(b,c,d,e,a,79);
/* Add the working vars back into context.state[] */
state[0] += a;
state[1] += b;
state[2] += c;
state[3] += d;
state[4] += e;
/* Wipe variables */
a = b = c = d = e = 0;
}
/* SHA1_Init - Initialize new context */
static void SHA1_Init(SHA_CTX* context)
{
/* SHA1 initialization constants */
context->state[0] = 0x67452301;
context->state[1] = 0xEFCDAB89;
context->state[2] = 0x98BADCFE;
context->state[3] = 0x10325476;
context->state[4] = 0xC3D2E1F0;
context->count[0] = context->count[1] = 0;
}
/* Run your data through this. */
static void SHA1_Update(SHA_CTX* context, const unsigned char* data, unsigned int len)
{
unsigned int i, j;
j = (context->count[0] >> 3) & 63;
if ((context->count[0] += len << 3) < (len << 3)) context->count[1]++;
context->count[1] += (len >> 29);
if ((j + len) > 63) {
memcpy(&context->buffer[j], data, (i = 64-j));
SHA1_Transform(context->state, context->buffer);
for ( ; i + 63 < len; i += 64) {
SHA1_Transform(context->state, &data[i]);
}
j = 0;
}
else i = 0;
memcpy(&context->buffer[j], &data[i], len - i);
}
/* Add padding and return the message digest. */
static void SHA1_Final(unsigned char digest[20], SHA_CTX* context)
{
uint32_t i, j;
unsigned char finalcount[8];
for (i = 0; i < 8; i++) {
finalcount[i] = (unsigned char)((context->count[(i >= 4 ? 0 : 1)]
>> ((3-(i & 3)) * 8) ) & 255); /* Endian independent */
}
SHA1_Update(context, (unsigned char *)"\200", 1);
while ((context->count[0] & 504) != 448) {
SHA1_Update(context, (unsigned char *)"\0", 1);
}
SHA1_Update(context, finalcount, 8); /* Should cause a SHA1_Transform() */
for (i = 0; i < 20; i++) {
digest[i] = (unsigned char)
((context->state[i>>2] >> ((3-(i & 3)) * 8) ) & 255);
}
/* Wipe variables */
i = j = 0;
memset(context->buffer, 0, 64);
memset(context->state, 0, 20);
memset(context->count, 0, 8);
memset(&finalcount, 0, 8);
#ifdef SHA1HANDSOFF /* make SHA1_Transform overwrite it's own static vars */
SHA1_Transform(context->state, context->buffer);
#endif
}
#endif /* GG_CONFIG_HAVE_OPENSSL */
/** \endcond */
/** \cond internal */
/**
* \internal Liczy skrĂłt SHA1 z ziarna i hasĹa.
*
* \param password HasĹo
* \param seed Ziarno
* \param result Bufor na wynik funkcji skrĂłtu (20 bajtĂłw)
*/
void gg_login_hash_sha1(const char *password, uint32_t seed, uint8_t *result)
{
SHA_CTX ctx;
SHA1_Init(&ctx);
SHA1_Update(&ctx, (const unsigned char*) password, (unsigned int)strlen(password));
seed = gg_fix32(seed);
SHA1_Update(&ctx, (uint8_t*) &seed, 4);
SHA1_Final(result, &ctx);
}
/**
* \internal Liczy skrĂłt SHA1 z pliku.
*
* \param fd Deskryptor pliku
* \param result WskaĹşnik na skrĂłt
*
* \return 0 lub -1
*/
int gg_file_hash_sha1(int fd, uint8_t *result)
{
unsigned char buf[4096];
SHA_CTX ctx;
off_t pos, len;
int res;
if ((pos = lseek(fd, 0, SEEK_CUR)) == (off_t) -1)
return -1;
if ((len = lseek(fd, 0, SEEK_END)) == (off_t) -1)
return -1;
if (lseek(fd, 0, SEEK_SET) == (off_t) -1)
return -1;
SHA1_Init(&ctx);
if (len <= 10485760) {
while ((res = read(fd, buf, sizeof(buf))) > 0)
SHA1_Update(&ctx, buf, res);
} else {
int i;
for (i = 0; i < 9; i++) {
int j;
if (lseek(fd, (len - 1048576) / 9 * i, SEEK_SET) == (off_t) - 1)
return -1;
for (j = 0; j < 1048576 / sizeof(buf); j++) {
if ((res = read(fd, buf, sizeof(buf))) != sizeof(buf)) {
res = -1;
break;
}
SHA1_Update(&ctx, buf, res);
}
if (res == -1)
break;
}
}
if (res == -1)
return -1;
SHA1_Final(result, &ctx);
if (lseek(fd, pos, SEEK_SET) == (off_t) -1)
return -1;
return 0;
}
/** \endcond */
|
