mirror of
http://galexander.org/git/simplesshd.git
synced 2024-11-27 17:58:13 +00:00
305 lines
6.9 KiB
C
305 lines
6.9 KiB
C
/*
|
|
* RFC 1321 compliant MD5 implementation
|
|
*
|
|
* Copyright (C) 2001-2003 Christophe Devine
|
|
*
|
|
* 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 3 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, visit the http://fsf.org website.
|
|
*/
|
|
|
|
#include "rsync.h"
|
|
|
|
void md5_begin(md_context *ctx)
|
|
{
|
|
ctx->A = 0x67452301;
|
|
ctx->B = 0xEFCDAB89;
|
|
ctx->C = 0x98BADCFE;
|
|
ctx->D = 0x10325476;
|
|
|
|
ctx->totalN = ctx->totalN2 = 0;
|
|
}
|
|
|
|
static void md5_process(md_context *ctx, const uchar data[CSUM_CHUNK])
|
|
{
|
|
uint32 X[16], A, B, C, D;
|
|
|
|
A = ctx->A;
|
|
B = ctx->B;
|
|
C = ctx->C;
|
|
D = ctx->D;
|
|
|
|
X[0] = IVALu(data, 0);
|
|
X[1] = IVALu(data, 4);
|
|
X[2] = IVALu(data, 8);
|
|
X[3] = IVALu(data, 12);
|
|
X[4] = IVALu(data, 16);
|
|
X[5] = IVALu(data, 20);
|
|
X[6] = IVALu(data, 24);
|
|
X[7] = IVALu(data, 28);
|
|
X[8] = IVALu(data, 32);
|
|
X[9] = IVALu(data, 36);
|
|
X[10] = IVALu(data, 40);
|
|
X[11] = IVALu(data, 44);
|
|
X[12] = IVALu(data, 48);
|
|
X[13] = IVALu(data, 52);
|
|
X[14] = IVALu(data, 56);
|
|
X[15] = IVALu(data, 60);
|
|
|
|
#define S(x,n) ((x << n) | ((x & 0xFFFFFFFF) >> (32 - n)))
|
|
|
|
#define P(a,b,c,d,k,s,t) a += F(b,c,d) + X[k] + t, a = S(a,s) + b
|
|
|
|
#define F(x,y,z) (z ^ (x & (y ^ z)))
|
|
|
|
P(A, B, C, D, 0, 7, 0xD76AA478);
|
|
P(D, A, B, C, 1, 12, 0xE8C7B756);
|
|
P(C, D, A, B, 2, 17, 0x242070DB);
|
|
P(B, C, D, A, 3, 22, 0xC1BDCEEE);
|
|
P(A, B, C, D, 4, 7, 0xF57C0FAF);
|
|
P(D, A, B, C, 5, 12, 0x4787C62A);
|
|
P(C, D, A, B, 6, 17, 0xA8304613);
|
|
P(B, C, D, A, 7, 22, 0xFD469501);
|
|
P(A, B, C, D, 8, 7, 0x698098D8);
|
|
P(D, A, B, C, 9, 12, 0x8B44F7AF);
|
|
P(C, D, A, B, 10, 17, 0xFFFF5BB1);
|
|
P(B, C, D, A, 11, 22, 0x895CD7BE);
|
|
P(A, B, C, D, 12, 7, 0x6B901122);
|
|
P(D, A, B, C, 13, 12, 0xFD987193);
|
|
P(C, D, A, B, 14, 17, 0xA679438E);
|
|
P(B, C, D, A, 15, 22, 0x49B40821);
|
|
|
|
#undef F
|
|
#define F(x,y,z) (y ^ (z & (x ^ y)))
|
|
|
|
P(A, B, C, D, 1, 5, 0xF61E2562);
|
|
P(D, A, B, C, 6, 9, 0xC040B340);
|
|
P(C, D, A, B, 11, 14, 0x265E5A51);
|
|
P(B, C, D, A, 0, 20, 0xE9B6C7AA);
|
|
P(A, B, C, D, 5, 5, 0xD62F105D);
|
|
P(D, A, B, C, 10, 9, 0x02441453);
|
|
P(C, D, A, B, 15, 14, 0xD8A1E681);
|
|
P(B, C, D, A, 4, 20, 0xE7D3FBC8);
|
|
P(A, B, C, D, 9, 5, 0x21E1CDE6);
|
|
P(D, A, B, C, 14, 9, 0xC33707D6);
|
|
P(C, D, A, B, 3, 14, 0xF4D50D87);
|
|
P(B, C, D, A, 8, 20, 0x455A14ED);
|
|
P(A, B, C, D, 13, 5, 0xA9E3E905);
|
|
P(D, A, B, C, 2, 9, 0xFCEFA3F8);
|
|
P(C, D, A, B, 7, 14, 0x676F02D9);
|
|
P(B, C, D, A, 12, 20, 0x8D2A4C8A);
|
|
|
|
#undef F
|
|
#define F(x,y,z) (x ^ y ^ z)
|
|
|
|
P(A, B, C, D, 5, 4, 0xFFFA3942);
|
|
P(D, A, B, C, 8, 11, 0x8771F681);
|
|
P(C, D, A, B, 11, 16, 0x6D9D6122);
|
|
P(B, C, D, A, 14, 23, 0xFDE5380C);
|
|
P(A, B, C, D, 1, 4, 0xA4BEEA44);
|
|
P(D, A, B, C, 4, 11, 0x4BDECFA9);
|
|
P(C, D, A, B, 7, 16, 0xF6BB4B60);
|
|
P(B, C, D, A, 10, 23, 0xBEBFBC70);
|
|
P(A, B, C, D, 13, 4, 0x289B7EC6);
|
|
P(D, A, B, C, 0, 11, 0xEAA127FA);
|
|
P(C, D, A, B, 3, 16, 0xD4EF3085);
|
|
P(B, C, D, A, 6, 23, 0x04881D05);
|
|
P(A, B, C, D, 9, 4, 0xD9D4D039);
|
|
P(D, A, B, C, 12, 11, 0xE6DB99E5);
|
|
P(C, D, A, B, 15, 16, 0x1FA27CF8);
|
|
P(B, C, D, A, 2, 23, 0xC4AC5665);
|
|
|
|
#undef F
|
|
#define F(x,y,z) (y ^ (x | ~z))
|
|
|
|
P(A, B, C, D, 0, 6, 0xF4292244);
|
|
P(D, A, B, C, 7, 10, 0x432AFF97);
|
|
P(C, D, A, B, 14, 15, 0xAB9423A7);
|
|
P(B, C, D, A, 5, 21, 0xFC93A039);
|
|
P(A, B, C, D, 12, 6, 0x655B59C3);
|
|
P(D, A, B, C, 3, 10, 0x8F0CCC92);
|
|
P(C, D, A, B, 10, 15, 0xFFEFF47D);
|
|
P(B, C, D, A, 1, 21, 0x85845DD1);
|
|
P(A, B, C, D, 8, 6, 0x6FA87E4F);
|
|
P(D, A, B, C, 15, 10, 0xFE2CE6E0);
|
|
P(C, D, A, B, 6, 15, 0xA3014314);
|
|
P(B, C, D, A, 13, 21, 0x4E0811A1);
|
|
P(A, B, C, D, 4, 6, 0xF7537E82);
|
|
P(D, A, B, C, 11, 10, 0xBD3AF235);
|
|
P(C, D, A, B, 2, 15, 0x2AD7D2BB);
|
|
P(B, C, D, A, 9, 21, 0xEB86D391);
|
|
|
|
#undef F
|
|
|
|
ctx->A += A;
|
|
ctx->B += B;
|
|
ctx->C += C;
|
|
ctx->D += D;
|
|
}
|
|
|
|
void md5_update(md_context *ctx, const uchar *input, uint32 length)
|
|
{
|
|
uint32 left, fill;
|
|
|
|
if (!length)
|
|
return;
|
|
|
|
left = ctx->totalN & 0x3F;
|
|
fill = CSUM_CHUNK - left;
|
|
|
|
ctx->totalN += length;
|
|
ctx->totalN &= 0xFFFFFFFF;
|
|
|
|
if (ctx->totalN < length)
|
|
ctx->totalN2++;
|
|
|
|
if (left && length >= fill) {
|
|
memcpy(ctx->buffer + left, input, fill);
|
|
md5_process(ctx, ctx->buffer);
|
|
length -= fill;
|
|
input += fill;
|
|
left = 0;
|
|
}
|
|
|
|
while (length >= CSUM_CHUNK) {
|
|
md5_process(ctx, input);
|
|
length -= CSUM_CHUNK;
|
|
input += CSUM_CHUNK;
|
|
}
|
|
|
|
if (length)
|
|
memcpy(ctx->buffer + left, input, length);
|
|
}
|
|
|
|
static uchar md5_padding[CSUM_CHUNK] = { 0x80 };
|
|
|
|
void md5_result(md_context *ctx, uchar digest[MD5_DIGEST_LEN])
|
|
{
|
|
uint32 last, padn;
|
|
uint32 high, low;
|
|
uchar msglen[8];
|
|
|
|
high = (ctx->totalN >> 29)
|
|
| (ctx->totalN2 << 3);
|
|
low = (ctx->totalN << 3);
|
|
|
|
SIVALu(msglen, 0, low);
|
|
SIVALu(msglen, 4, high);
|
|
|
|
last = ctx->totalN & 0x3F;
|
|
padn = last < 56 ? 56 - last : 120 - last;
|
|
|
|
md5_update(ctx, md5_padding, padn);
|
|
md5_update(ctx, msglen, 8);
|
|
|
|
SIVALu(digest, 0, ctx->A);
|
|
SIVALu(digest, 4, ctx->B);
|
|
SIVALu(digest, 8, ctx->C);
|
|
SIVALu(digest, 12, ctx->D);
|
|
}
|
|
|
|
void get_md5(uchar *out, const uchar *input, int n)
|
|
{
|
|
md_context ctx;
|
|
md5_begin(&ctx);
|
|
md5_update(&ctx, input, n);
|
|
md5_result(&ctx, out);
|
|
}
|
|
|
|
#ifdef TEST_MD5
|
|
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
|
|
/*
|
|
* those are the standard RFC 1321 test vectors
|
|
*/
|
|
|
|
static struct {
|
|
char *str, *md5;
|
|
} tests[] = {
|
|
{ "",
|
|
"d41d8cd98f00b204e9800998ecf8427e" },
|
|
{ "a",
|
|
"0cc175b9c0f1b6a831c399e269772661" },
|
|
{ "abc",
|
|
"900150983cd24fb0d6963f7d28e17f72" },
|
|
{ "message digest",
|
|
"f96b697d7cb7938d525a2f31aaf161d0" },
|
|
{ "abcdefghijklmnopqrstuvwxyz",
|
|
"c3fcd3d76192e4007dfb496cca67e13b" },
|
|
{ "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789",
|
|
"d174ab98d277d9f5a5611c2c9f419d9f" },
|
|
{ "12345678901234567890123456789012345678901234567890123456789012345678901234567890",
|
|
"57edf4a22be3c955ac49da2e2107b67a" },
|
|
{ NULL, NULL }
|
|
};
|
|
|
|
int main(int argc, char *argv[])
|
|
{
|
|
FILE *f;
|
|
int i, j;
|
|
char output[33];
|
|
md_context ctx;
|
|
uchar buf[1000];
|
|
uchar md5sum[MD5_DIGEST_LEN];
|
|
|
|
if (argc < 2) {
|
|
printf("\nMD5 Validation Tests:\n\n");
|
|
|
|
for (i = 0; tests[i].str; i++) {
|
|
char *str = tests[i].str;
|
|
char *chk = tests[i].md5;
|
|
|
|
printf(" Test %d ", i + 1);
|
|
|
|
get_md5(md5sum, str, strlen(str));
|
|
|
|
for (j = 0; j < MD5_DIGEST_LEN; j++)
|
|
sprintf(output + j * 2, "%02x", md5sum[j]);
|
|
|
|
if (memcmp(output, chk, 32)) {
|
|
printf("failed!\n");
|
|
return 1;
|
|
}
|
|
|
|
printf("passed.\n");
|
|
}
|
|
|
|
printf("\n");
|
|
return 0;
|
|
}
|
|
|
|
while (--argc) {
|
|
if (!(f = fopen(*++argv, "rb"))) {
|
|
perror("fopen");
|
|
return 1;
|
|
}
|
|
|
|
md5_begin(&ctx);
|
|
|
|
while ((i = fread(buf, 1, sizeof buf, f)) > 0)
|
|
md5_update(&ctx, buf, i);
|
|
|
|
md5_result(&ctx, md5sum);
|
|
|
|
for (j = 0; j < MD5_DIGEST_LEN; j++)
|
|
printf("%02x", md5sum[j]);
|
|
|
|
printf(" %s\n", *argv);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
#endif
|