pjs/cck/cckwiz/ConfigEditor/nsMsgMD5.cpp

257 строки
6.3 KiB
C++

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
/*
* MD5 digest implementation
*
* contributed by mrsam@geocities.com
*
*/
/* for endian-ness */
//#include "prtypes.h"
#include "string.h"
//#include "nsMsgMD5.h"
#define MD5_BYTE unsigned char
#define MD5_WORD unsigned int
extern "C" const void *nsMsgMD5Digest(const void *msg, unsigned int len);
typedef union md5_endian {
//#ifdef IS_LITTLE_ENDIAN
MD5_WORD m_word;
struct {
MD5_BYTE m_0, m_1, m_2, m_3;
} m_bytes;
//#endif
/*#ifdef IS_BIG_ENDIAN
MD5_WORD m_word;
struct {
MD5_BYTE m_3, m_2, m_1, m_0;
} m_bytes;
#endif
*/ } ;
static const MD5_BYTE *m_msg;
static MD5_WORD m_msglen;
static MD5_WORD m_msgpaddedlen;
static MD5_BYTE m_pad[72];
static MD5_BYTE m_digest[16];
#define MD5_MSGBYTE(n) ((MD5_BYTE)((n) < m_msglen?m_msg[n]:m_pad[n-m_msglen]))
inline void MD5_MSGWORD(MD5_WORD &n, MD5_WORD i)
{
union md5_endian e;
i *= 4;
e.m_bytes.m_0=MD5_MSGBYTE(i); ++i;
e.m_bytes.m_1=MD5_MSGBYTE(i); ++i;
e.m_bytes.m_2=MD5_MSGBYTE(i); ++i;
e.m_bytes.m_3=MD5_MSGBYTE(i);
n=e.m_word;
}
inline MD5_WORD MD5_ROL(MD5_WORD w, int n)
{
return ( w << n | ( (w) >> (32-n) ) );
}
static MD5_WORD T[64]={
0xd76aa478, 0xe8c7b756, 0x242070db, 0xc1bdceee,
0xf57c0faf, 0x4787c62a, 0xa8304613, 0xfd469501,
0x698098d8, 0x8b44f7af, 0xffff5bb1, 0x895cd7be,
0x6b901122, 0xfd987193, 0xa679438e, 0x49b40821,
0xf61e2562, 0xc040b340, 0x265e5a51, 0xe9b6c7aa,
0xd62f105d, 0x2441453, 0xd8a1e681, 0xe7d3fbc8,
0x21e1cde6, 0xc33707d6, 0xf4d50d87, 0x455a14ed,
0xa9e3e905, 0xfcefa3f8, 0x676f02d9, 0x8d2a4c8a,
0xfffa3942, 0x8771f681, 0x6d9d6122, 0xfde5380c,
0xa4beea44, 0x4bdecfa9, 0xf6bb4b60, 0xbebfbc70,
0x289b7ec6, 0xeaa127fa, 0xd4ef3085, 0x4881d05,
0xd9d4d039, 0xe6db99e5, 0x1fa27cf8, 0xc4ac5665,
0xf4292244, 0x432aff97, 0xab9423a7, 0xfc93a039,
0x655b59c3, 0x8f0ccc92, 0xffeff47d, 0x85845dd1,
0x6fa87e4f, 0xfe2ce6e0, 0xa3014314, 0x4e0811a1,
0xf7537e82, 0xbd3af235, 0x2ad7d2bb, 0xeb86d391};
const void *nsMsgMD5Digest(const void *msg, unsigned int len)
{
MD5_WORD i,j;
union md5_endian e;
MD5_WORD hilen, lolen;
MD5_BYTE padlen[8];
m_msg=(const MD5_BYTE *)msg;
m_msglen=len;
m_msgpaddedlen = len+72;
m_msgpaddedlen &= ~63;
for (i=0; i<72; i++) m_pad[i]=0;
m_pad[0]=0x80;
lolen=len << 3;
hilen=len >> 29;
e.m_word=lolen;
padlen[0]=e.m_bytes.m_0;
padlen[1]=e.m_bytes.m_1;
padlen[2]=e.m_bytes.m_2;
padlen[3]=e.m_bytes.m_3;
e.m_word=hilen;
padlen[4]=e.m_bytes.m_0;
padlen[5]=e.m_bytes.m_1;
padlen[6]=e.m_bytes.m_2;
padlen[7]=e.m_bytes.m_3;
memcpy( &m_pad[m_msgpaddedlen - m_msglen - 8], padlen, 8);
MD5_WORD A=0x67452301;
MD5_WORD B=0xefcdab89;
MD5_WORD C=0x98badcfe;
MD5_WORD D=0x10325476;
#define F(X,Y,Z) ( ((X) & (Y)) | ( (~(X)) & (Z)))
#define G(X,Y,Z) ( ((X) & (Z)) | ( (Y) & (~(Z))))
#define H(X,Y,Z) ( (X) ^ (Y) ^ (Z) )
#define I(X,Y,Z) ( (Y) ^ ( (X) | (~(Z))))
MD5_WORD nwords= m_msgpaddedlen / 4, k=0;
MD5_WORD x[16];
for (i=0; i<nwords; i += 16)
{
for (j=0; j<16; j++)
{
MD5_MSGWORD(x[j],k);
++k;
}
MD5_WORD AA=A, BB=B, CC=C, DD=D;
#define ROUND1(a,b,c,d,k,s,i) \
a = b + MD5_ROL((a + F(b,c,d) + x[k] + T[i]),s)
ROUND1(A,B,C,D,0,7,0);
ROUND1(D,A,B,C,1,12,1);
ROUND1(C,D,A,B,2,17,2);
ROUND1(B,C,D,A,3,22,3);
ROUND1(A,B,C,D,4,7,4);
ROUND1(D,A,B,C,5,12,5);
ROUND1(C,D,A,B,6,17,6);
ROUND1(B,C,D,A,7,22,7);
ROUND1(A,B,C,D,8,7,8);
ROUND1(D,A,B,C,9,12,9);
ROUND1(C,D,A,B,10,17,10);
ROUND1(B,C,D,A,11,22,11);
ROUND1(A,B,C,D,12,7,12);
ROUND1(D,A,B,C,13,12,13);
ROUND1(C,D,A,B,14,17,14);
ROUND1(B,C,D,A,15,22,15);
#define ROUND2(a,b,c,d,k,s,i) \
a = b + MD5_ROL((a + G(b,c,d) + x[k] + T[i]),s)
ROUND2(A,B,C,D,1,5,16);
ROUND2(D,A,B,C,6,9,17);
ROUND2(C,D,A,B,11,14,18);
ROUND2(B,C,D,A,0,20,19);
ROUND2(A,B,C,D,5,5,20);
ROUND2(D,A,B,C,10,9,21);
ROUND2(C,D,A,B,15,14,22);
ROUND2(B,C,D,A,4,20,23);
ROUND2(A,B,C,D,9,5,24);
ROUND2(D,A,B,C,14,9,25);
ROUND2(C,D,A,B,3,14,26);
ROUND2(B,C,D,A,8,20,27);
ROUND2(A,B,C,D,13,5,28);
ROUND2(D,A,B,C,2,9,29);
ROUND2(C,D,A,B,7,14,30);
ROUND2(B,C,D,A,12,20,31);
#define ROUND3(a,b,c,d,k,s,i) \
a = b + MD5_ROL((a + H(b,c,d) + x[k] + T[i]),s)
ROUND3(A,B,C,D,5,4,32);
ROUND3(D,A,B,C,8,11,33);
ROUND3(C,D,A,B,11,16,34);
ROUND3(B,C,D,A,14,23,35);
ROUND3(A,B,C,D,1,4,36);
ROUND3(D,A,B,C,4,11,37);
ROUND3(C,D,A,B,7,16,38);
ROUND3(B,C,D,A,10,23,39);
ROUND3(A,B,C,D,13,4,40);
ROUND3(D,A,B,C,0,11,41);
ROUND3(C,D,A,B,3,16,42);
ROUND3(B,C,D,A,6,23,43);
ROUND3(A,B,C,D,9,4,44);
ROUND3(D,A,B,C,12,11,45);
ROUND3(C,D,A,B,15,16,46);
ROUND3(B,C,D,A,2,23,47);
#define ROUND4(a,b,c,d,k,s,i) \
a = b + MD5_ROL((a + I(b,c,d) + x[k] + T[i]),s)
ROUND4(A,B,C,D,0,6,48);
ROUND4(D,A,B,C,7,10,49);
ROUND4(C,D,A,B,14,15,50);
ROUND4(B,C,D,A,5,21,51);
ROUND4(A,B,C,D,12,6,52);
ROUND4(D,A,B,C,3,10,53);
ROUND4(C,D,A,B,10,15,54);
ROUND4(B,C,D,A,1,21,55);
ROUND4(A,B,C,D,8,6,56);
ROUND4(D,A,B,C,15,10,57);
ROUND4(C,D,A,B,6,15,58);
ROUND4(B,C,D,A,13,21,59);
ROUND4(A,B,C,D,4,6,60);
ROUND4(D,A,B,C,11,10,61);
ROUND4(C,D,A,B,2,15,62);
ROUND4(B,C,D,A,9,21,63);
A += AA;
B += BB;
C += CC;
D += DD;
}
union md5_endian ea, eb, ec, ed;
ea.m_word=A;
eb.m_word=B;
ec.m_word=C;
ed.m_word=D;
m_digest[0]=ea.m_bytes.m_0;
m_digest[1]=ea.m_bytes.m_1;
m_digest[2]=ea.m_bytes.m_2;
m_digest[3]=ea.m_bytes.m_3;
m_digest[4]=eb.m_bytes.m_0;
m_digest[5]=eb.m_bytes.m_1;
m_digest[6]=eb.m_bytes.m_2;
m_digest[7]=eb.m_bytes.m_3;
m_digest[8]=ec.m_bytes.m_0;
m_digest[9]=ec.m_bytes.m_1;
m_digest[10]=ec.m_bytes.m_2;
m_digest[11]=ec.m_bytes.m_3;
m_digest[12]=ed.m_bytes.m_0;
m_digest[13]=ed.m_bytes.m_1;
m_digest[14]=ed.m_bytes.m_2;
m_digest[15]=ed.m_bytes.m_3;
return (m_digest);
}