/*
* RFC 1321 compliant MD5 implementation
*
* Copyright (C) 2001-2003 Christophe Devine
* Copyright (C) 2007-2020 Wayne Davison
*
* 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"
#ifndef USE_OPENSSL
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;
}
#if defined HAVE_ASM && CSUM_CHUNK == 64
extern void md5_process_asm(md_context *ctx, const void *data, size_t num);
#endif
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;
}
#if defined HAVE_ASM && CSUM_CHUNK == 64
if (length >= CSUM_CHUNK) {
uint32 chunks = length / CSUM_CHUNK;
md5_process_asm(ctx, input, chunks);
length -= chunks * CSUM_CHUNK;
input += chunks * CSUM_CHUNK;
}
#else
while (length >= CSUM_CHUNK) {
md5_process(ctx, input);
length -= CSUM_CHUNK;
input += CSUM_CHUNK;
}
#endif
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);
}
#endif
#ifdef TEST_MD5
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);
}
#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
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