mirror of https://gitee.com/openkylin/swig.git
285 lines
6.0 KiB
C
285 lines
6.0 KiB
C
/*
|
|
a implementation of MD4 designed for use in the SMB authentication protocol
|
|
Copyright (C) Andrew Tridgell 1997-1998.
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
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 General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*/
|
|
|
|
#include "ccache.h"
|
|
|
|
/* NOTE: This code makes no attempt to be fast!
|
|
|
|
It assumes that a int is at least 32 bits long
|
|
*/
|
|
|
|
static struct mdfour *m;
|
|
|
|
#define MASK32 (0xffffffff)
|
|
|
|
#define F(X,Y,Z) ((((X)&(Y)) | ((~(X))&(Z))))
|
|
#define G(X,Y,Z) ((((X)&(Y)) | ((X)&(Z)) | ((Y)&(Z))))
|
|
#define H(X,Y,Z) (((X)^(Y)^(Z)))
|
|
#define lshift(x,s) (((((x)<<(s))&MASK32) | (((x)>>(32-(s)))&MASK32)))
|
|
|
|
#define ROUND1(a,b,c,d,k,s) a = lshift((a + F(b,c,d) + M[k])&MASK32, s)
|
|
#define ROUND2(a,b,c,d,k,s) a = lshift((a + G(b,c,d) + M[k] + 0x5A827999)&MASK32,s)
|
|
#define ROUND3(a,b,c,d,k,s) a = lshift((a + H(b,c,d) + M[k] + 0x6ED9EBA1)&MASK32,s)
|
|
|
|
/* this applies md4 to 64 byte chunks */
|
|
static void mdfour64(uint32 *M)
|
|
{
|
|
uint32 AA, BB, CC, DD;
|
|
uint32 A,B,C,D;
|
|
|
|
A = m->A; B = m->B; C = m->C; D = m->D;
|
|
AA = A; BB = B; CC = C; DD = D;
|
|
|
|
ROUND1(A,B,C,D, 0, 3); ROUND1(D,A,B,C, 1, 7);
|
|
ROUND1(C,D,A,B, 2, 11); ROUND1(B,C,D,A, 3, 19);
|
|
ROUND1(A,B,C,D, 4, 3); ROUND1(D,A,B,C, 5, 7);
|
|
ROUND1(C,D,A,B, 6, 11); ROUND1(B,C,D,A, 7, 19);
|
|
ROUND1(A,B,C,D, 8, 3); ROUND1(D,A,B,C, 9, 7);
|
|
ROUND1(C,D,A,B, 10, 11); ROUND1(B,C,D,A, 11, 19);
|
|
ROUND1(A,B,C,D, 12, 3); ROUND1(D,A,B,C, 13, 7);
|
|
ROUND1(C,D,A,B, 14, 11); ROUND1(B,C,D,A, 15, 19);
|
|
|
|
|
|
ROUND2(A,B,C,D, 0, 3); ROUND2(D,A,B,C, 4, 5);
|
|
ROUND2(C,D,A,B, 8, 9); ROUND2(B,C,D,A, 12, 13);
|
|
ROUND2(A,B,C,D, 1, 3); ROUND2(D,A,B,C, 5, 5);
|
|
ROUND2(C,D,A,B, 9, 9); ROUND2(B,C,D,A, 13, 13);
|
|
ROUND2(A,B,C,D, 2, 3); ROUND2(D,A,B,C, 6, 5);
|
|
ROUND2(C,D,A,B, 10, 9); ROUND2(B,C,D,A, 14, 13);
|
|
ROUND2(A,B,C,D, 3, 3); ROUND2(D,A,B,C, 7, 5);
|
|
ROUND2(C,D,A,B, 11, 9); ROUND2(B,C,D,A, 15, 13);
|
|
|
|
ROUND3(A,B,C,D, 0, 3); ROUND3(D,A,B,C, 8, 9);
|
|
ROUND3(C,D,A,B, 4, 11); ROUND3(B,C,D,A, 12, 15);
|
|
ROUND3(A,B,C,D, 2, 3); ROUND3(D,A,B,C, 10, 9);
|
|
ROUND3(C,D,A,B, 6, 11); ROUND3(B,C,D,A, 14, 15);
|
|
ROUND3(A,B,C,D, 1, 3); ROUND3(D,A,B,C, 9, 9);
|
|
ROUND3(C,D,A,B, 5, 11); ROUND3(B,C,D,A, 13, 15);
|
|
ROUND3(A,B,C,D, 3, 3); ROUND3(D,A,B,C, 11, 9);
|
|
ROUND3(C,D,A,B, 7, 11); ROUND3(B,C,D,A, 15, 15);
|
|
|
|
A += AA; B += BB;
|
|
C += CC; D += DD;
|
|
|
|
A &= MASK32; B &= MASK32;
|
|
C &= MASK32; D &= MASK32;
|
|
|
|
m->A = A; m->B = B; m->C = C; m->D = D;
|
|
}
|
|
|
|
static void copy64(uint32 *M, const unsigned char *in)
|
|
{
|
|
int i;
|
|
|
|
for (i=0;i<16;i++)
|
|
M[i] = (in[i*4+3]<<24) | (in[i*4+2]<<16) |
|
|
(in[i*4+1]<<8) | (in[i*4+0]<<0);
|
|
}
|
|
|
|
static void copy4(unsigned char *out,uint32 x)
|
|
{
|
|
out[0] = x&0xFF;
|
|
out[1] = (x>>8)&0xFF;
|
|
out[2] = (x>>16)&0xFF;
|
|
out[3] = (x>>24)&0xFF;
|
|
}
|
|
|
|
void mdfour_begin(struct mdfour *md)
|
|
{
|
|
md->A = 0x67452301;
|
|
md->B = 0xefcdab89;
|
|
md->C = 0x98badcfe;
|
|
md->D = 0x10325476;
|
|
md->totalN = 0;
|
|
md->tail_len = 0;
|
|
}
|
|
|
|
|
|
static void mdfour_tail(const unsigned char *in, int n)
|
|
{
|
|
unsigned char buf[128];
|
|
uint32 M[16];
|
|
uint32 b;
|
|
|
|
m->totalN += n;
|
|
|
|
b = m->totalN * 8;
|
|
|
|
memset(buf, 0, 128);
|
|
if (n) memcpy(buf, in, n);
|
|
buf[n] = 0x80;
|
|
|
|
if (n <= 55) {
|
|
copy4(buf+56, b);
|
|
copy64(M, buf);
|
|
mdfour64(M);
|
|
} else {
|
|
copy4(buf+120, b);
|
|
copy64(M, buf);
|
|
mdfour64(M);
|
|
copy64(M, buf+64);
|
|
mdfour64(M);
|
|
}
|
|
}
|
|
|
|
void mdfour_update(struct mdfour *md, const unsigned char *in, int n)
|
|
{
|
|
uint32 M[16];
|
|
|
|
m = md;
|
|
|
|
if (in == NULL) {
|
|
mdfour_tail(md->tail, md->tail_len);
|
|
return;
|
|
}
|
|
|
|
if (md->tail_len) {
|
|
int len = 64 - md->tail_len;
|
|
if (len > n) len = n;
|
|
memcpy(md->tail+md->tail_len, in, len);
|
|
md->tail_len += len;
|
|
n -= len;
|
|
in += len;
|
|
if (md->tail_len == 64) {
|
|
copy64(M, md->tail);
|
|
mdfour64(M);
|
|
m->totalN += 64;
|
|
md->tail_len = 0;
|
|
}
|
|
}
|
|
|
|
while (n >= 64) {
|
|
copy64(M, in);
|
|
mdfour64(M);
|
|
in += 64;
|
|
n -= 64;
|
|
m->totalN += 64;
|
|
}
|
|
|
|
if (n) {
|
|
memcpy(md->tail, in, n);
|
|
md->tail_len = n;
|
|
}
|
|
}
|
|
|
|
|
|
void mdfour_result(struct mdfour *md, unsigned char *out)
|
|
{
|
|
m = md;
|
|
|
|
copy4(out, m->A);
|
|
copy4(out+4, m->B);
|
|
copy4(out+8, m->C);
|
|
copy4(out+12, m->D);
|
|
}
|
|
|
|
|
|
void mdfour(unsigned char *out, const unsigned char *in, int n)
|
|
{
|
|
struct mdfour md;
|
|
mdfour_begin(&md);
|
|
mdfour_update(&md, in, n);
|
|
mdfour_update(&md, NULL, 0);
|
|
mdfour_result(&md, out);
|
|
}
|
|
|
|
#ifdef TEST_MDFOUR
|
|
static void file_checksum1(char *fname)
|
|
{
|
|
int fd, i;
|
|
struct mdfour md;
|
|
unsigned char buf[1024], sum[16];
|
|
unsigned chunk;
|
|
|
|
fd = open(fname,O_RDONLY|O_BINARY);
|
|
if (fd == -1) {
|
|
perror("fname");
|
|
exit(1);
|
|
}
|
|
|
|
chunk = 1 + random() % (sizeof(buf) - 1);
|
|
|
|
mdfour_begin(&md);
|
|
|
|
while (1) {
|
|
int n = read(fd, buf, chunk);
|
|
if (n >= 0) {
|
|
mdfour_update(&md, buf, n);
|
|
}
|
|
if (n < chunk) break;
|
|
}
|
|
|
|
close(fd);
|
|
|
|
mdfour_update(&md, NULL, 0);
|
|
|
|
mdfour_result(&md, sum);
|
|
|
|
for (i=0;i<16;i++)
|
|
printf("%02x", sum[i]);
|
|
printf("\n");
|
|
}
|
|
|
|
#if 0
|
|
#include "../md4.h"
|
|
|
|
static void file_checksum2(char *fname)
|
|
{
|
|
int fd, i;
|
|
MDstruct md;
|
|
unsigned char buf[64], sum[16];
|
|
|
|
fd = open(fname,O_RDONLY|O_BINARY);
|
|
if (fd == -1) {
|
|
perror("fname");
|
|
exit(1);
|
|
}
|
|
|
|
MDbegin(&md);
|
|
|
|
while (1) {
|
|
int n = read(fd, buf, sizeof(buf));
|
|
if (n <= 0) break;
|
|
MDupdate(&md, buf, n*8);
|
|
}
|
|
|
|
if (!md.done) {
|
|
MDupdate(&md, buf, 0);
|
|
}
|
|
|
|
close(fd);
|
|
|
|
memcpy(sum, md.buffer, 16);
|
|
|
|
for (i=0;i<16;i++)
|
|
printf("%02x", sum[i]);
|
|
printf("\n");
|
|
}
|
|
#endif
|
|
|
|
int main(int argc, char *argv[])
|
|
{
|
|
file_checksum1(argv[1]);
|
|
#if 0
|
|
file_checksum2(argv[1]);
|
|
#endif
|
|
return 0;
|
|
}
|
|
#endif
|