mirror of
https://github.com/ossrs/srs.git
synced 2025-03-09 15:49:59 +00:00
126 lines
3.3 KiB
C
126 lines
3.3 KiB
C
/*
|
|
* Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
|
|
*
|
|
* Licensed under the OpenSSL license (the "License"). You may not use
|
|
* this file except in compliance with the License. You can obtain a copy
|
|
* in the file LICENSE in the source distribution or at
|
|
* https://www.openssl.org/source/license.html
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <openssl/crypto.h>
|
|
#include <openssl/des.h>
|
|
#include <openssl/mdc2.h>
|
|
|
|
#undef c2l
|
|
#define c2l(c,l) (l =((DES_LONG)(*((c)++))) , \
|
|
l|=((DES_LONG)(*((c)++)))<< 8L, \
|
|
l|=((DES_LONG)(*((c)++)))<<16L, \
|
|
l|=((DES_LONG)(*((c)++)))<<24L)
|
|
|
|
#undef l2c
|
|
#define l2c(l,c) (*((c)++)=(unsigned char)(((l) )&0xff), \
|
|
*((c)++)=(unsigned char)(((l)>> 8L)&0xff), \
|
|
*((c)++)=(unsigned char)(((l)>>16L)&0xff), \
|
|
*((c)++)=(unsigned char)(((l)>>24L)&0xff))
|
|
|
|
static void mdc2_body(MDC2_CTX *c, const unsigned char *in, size_t len);
|
|
int MDC2_Init(MDC2_CTX *c)
|
|
{
|
|
c->num = 0;
|
|
c->pad_type = 1;
|
|
memset(&(c->h[0]), 0x52, MDC2_BLOCK);
|
|
memset(&(c->hh[0]), 0x25, MDC2_BLOCK);
|
|
return 1;
|
|
}
|
|
|
|
int MDC2_Update(MDC2_CTX *c, const unsigned char *in, size_t len)
|
|
{
|
|
size_t i, j;
|
|
|
|
i = c->num;
|
|
if (i != 0) {
|
|
if (len < MDC2_BLOCK - i) {
|
|
/* partial block */
|
|
memcpy(&(c->data[i]), in, len);
|
|
c->num += (int)len;
|
|
return 1;
|
|
} else {
|
|
/* filled one */
|
|
j = MDC2_BLOCK - i;
|
|
memcpy(&(c->data[i]), in, j);
|
|
len -= j;
|
|
in += j;
|
|
c->num = 0;
|
|
mdc2_body(c, &(c->data[0]), MDC2_BLOCK);
|
|
}
|
|
}
|
|
i = len & ~((size_t)MDC2_BLOCK - 1);
|
|
if (i > 0)
|
|
mdc2_body(c, in, i);
|
|
j = len - i;
|
|
if (j > 0) {
|
|
memcpy(&(c->data[0]), &(in[i]), j);
|
|
c->num = (int)j;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static void mdc2_body(MDC2_CTX *c, const unsigned char *in, size_t len)
|
|
{
|
|
register DES_LONG tin0, tin1;
|
|
register DES_LONG ttin0, ttin1;
|
|
DES_LONG d[2], dd[2];
|
|
DES_key_schedule k;
|
|
unsigned char *p;
|
|
size_t i;
|
|
|
|
for (i = 0; i < len; i += 8) {
|
|
c2l(in, tin0);
|
|
d[0] = dd[0] = tin0;
|
|
c2l(in, tin1);
|
|
d[1] = dd[1] = tin1;
|
|
c->h[0] = (c->h[0] & 0x9f) | 0x40;
|
|
c->hh[0] = (c->hh[0] & 0x9f) | 0x20;
|
|
|
|
DES_set_odd_parity(&c->h);
|
|
DES_set_key_unchecked(&c->h, &k);
|
|
DES_encrypt1(d, &k, 1);
|
|
|
|
DES_set_odd_parity(&c->hh);
|
|
DES_set_key_unchecked(&c->hh, &k);
|
|
DES_encrypt1(dd, &k, 1);
|
|
|
|
ttin0 = tin0 ^ dd[0];
|
|
ttin1 = tin1 ^ dd[1];
|
|
tin0 ^= d[0];
|
|
tin1 ^= d[1];
|
|
|
|
p = c->h;
|
|
l2c(tin0, p);
|
|
l2c(ttin1, p);
|
|
p = c->hh;
|
|
l2c(ttin0, p);
|
|
l2c(tin1, p);
|
|
}
|
|
}
|
|
|
|
int MDC2_Final(unsigned char *md, MDC2_CTX *c)
|
|
{
|
|
unsigned int i;
|
|
int j;
|
|
|
|
i = c->num;
|
|
j = c->pad_type;
|
|
if ((i > 0) || (j == 2)) {
|
|
if (j == 2)
|
|
c->data[i++] = 0x80;
|
|
memset(&(c->data[i]), 0, MDC2_BLOCK - i);
|
|
mdc2_body(c, c->data, MDC2_BLOCK);
|
|
}
|
|
memcpy(md, (char *)c->h, MDC2_BLOCK);
|
|
memcpy(&(md[MDC2_BLOCK]), (char *)c->hh, MDC2_BLOCK);
|
|
return 1;
|
|
}
|