зеркало из https://github.com/mozilla/gecko-dev.git
261 строка
6.4 KiB
C++
261 строка
6.4 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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*/
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/*
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* MD5 digest implementation
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*
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* contributed by mrsam@geocities.com
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*
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*/
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/* for endian-ness */
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//#include "prtypes.h"
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#include "string.h"
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//#include "nsMsgMD5.h"
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#define MD5_BYTE unsigned char
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#define MD5_WORD unsigned int
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extern "C" const void *nsMsgMD5Digest(const void *msg, unsigned int len);
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typedef union md5_endian {
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//#ifdef IS_LITTLE_ENDIAN
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MD5_WORD m_word;
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struct {
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MD5_BYTE m_0, m_1, m_2, m_3;
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} m_bytes;
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//#endif
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/*#ifdef IS_BIG_ENDIAN
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MD5_WORD m_word;
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struct {
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MD5_BYTE m_3, m_2, m_1, m_0;
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} m_bytes;
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#endif
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*/ } ;
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static const MD5_BYTE *m_msg;
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static MD5_WORD m_msglen;
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static MD5_WORD m_msgpaddedlen;
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static MD5_BYTE m_pad[72];
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static MD5_BYTE m_digest[16];
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#define MD5_MSGBYTE(n) ((MD5_BYTE)((n) < m_msglen?m_msg[n]:m_pad[n-m_msglen]))
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inline void MD5_MSGWORD(MD5_WORD &n, MD5_WORD i)
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{
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union md5_endian e;
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i *= 4;
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e.m_bytes.m_0=MD5_MSGBYTE(i); ++i;
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e.m_bytes.m_1=MD5_MSGBYTE(i); ++i;
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e.m_bytes.m_2=MD5_MSGBYTE(i); ++i;
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e.m_bytes.m_3=MD5_MSGBYTE(i);
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n=e.m_word;
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}
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inline MD5_WORD MD5_ROL(MD5_WORD w, int n)
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{
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return ( w << n | ( (w) >> (32-n) ) );
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}
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static MD5_WORD T[64]={
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0xd76aa478, 0xe8c7b756, 0x242070db, 0xc1bdceee,
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0xf57c0faf, 0x4787c62a, 0xa8304613, 0xfd469501,
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0x698098d8, 0x8b44f7af, 0xffff5bb1, 0x895cd7be,
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0x6b901122, 0xfd987193, 0xa679438e, 0x49b40821,
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0xf61e2562, 0xc040b340, 0x265e5a51, 0xe9b6c7aa,
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0xd62f105d, 0x2441453, 0xd8a1e681, 0xe7d3fbc8,
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0x21e1cde6, 0xc33707d6, 0xf4d50d87, 0x455a14ed,
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0xa9e3e905, 0xfcefa3f8, 0x676f02d9, 0x8d2a4c8a,
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0xfffa3942, 0x8771f681, 0x6d9d6122, 0xfde5380c,
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0xa4beea44, 0x4bdecfa9, 0xf6bb4b60, 0xbebfbc70,
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0x289b7ec6, 0xeaa127fa, 0xd4ef3085, 0x4881d05,
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0xd9d4d039, 0xe6db99e5, 0x1fa27cf8, 0xc4ac5665,
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0xf4292244, 0x432aff97, 0xab9423a7, 0xfc93a039,
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0x655b59c3, 0x8f0ccc92, 0xffeff47d, 0x85845dd1,
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0x6fa87e4f, 0xfe2ce6e0, 0xa3014314, 0x4e0811a1,
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0xf7537e82, 0xbd3af235, 0x2ad7d2bb, 0xeb86d391};
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const void *nsMsgMD5Digest(const void *msg, unsigned int len)
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{
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MD5_WORD i,j;
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union md5_endian e;
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MD5_WORD hilen, lolen;
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MD5_BYTE padlen[8];
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m_msg=(const MD5_BYTE *)msg;
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m_msglen=len;
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m_msgpaddedlen = len+72;
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m_msgpaddedlen &= ~63;
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for (i=0; i<72; i++) m_pad[i]=0;
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m_pad[0]=0x80;
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lolen=len << 3;
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hilen=len >> 29;
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e.m_word=lolen;
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padlen[0]=e.m_bytes.m_0;
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padlen[1]=e.m_bytes.m_1;
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padlen[2]=e.m_bytes.m_2;
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padlen[3]=e.m_bytes.m_3;
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e.m_word=hilen;
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padlen[4]=e.m_bytes.m_0;
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padlen[5]=e.m_bytes.m_1;
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padlen[6]=e.m_bytes.m_2;
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padlen[7]=e.m_bytes.m_3;
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memcpy( &m_pad[m_msgpaddedlen - m_msglen - 8], padlen, 8);
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MD5_WORD A=0x67452301;
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MD5_WORD B=0xefcdab89;
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MD5_WORD C=0x98badcfe;
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MD5_WORD D=0x10325476;
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#define F(X,Y,Z) ( ((X) & (Y)) | ( (~(X)) & (Z)))
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#define G(X,Y,Z) ( ((X) & (Z)) | ( (Y) & (~(Z))))
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#define H(X,Y,Z) ( (X) ^ (Y) ^ (Z) )
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#define I(X,Y,Z) ( (Y) ^ ( (X) | (~(Z))))
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MD5_WORD nwords= m_msgpaddedlen / 4, k=0;
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MD5_WORD x[16];
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for (i=0; i<nwords; i += 16)
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{
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for (j=0; j<16; j++)
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{
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MD5_MSGWORD(x[j],k);
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++k;
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}
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MD5_WORD AA=A, BB=B, CC=C, DD=D;
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#define ROUND1(a,b,c,d,k,s,i) \
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a = b + MD5_ROL((a + F(b,c,d) + x[k] + T[i]),s)
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ROUND1(A,B,C,D,0,7,0);
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ROUND1(D,A,B,C,1,12,1);
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ROUND1(C,D,A,B,2,17,2);
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ROUND1(B,C,D,A,3,22,3);
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ROUND1(A,B,C,D,4,7,4);
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ROUND1(D,A,B,C,5,12,5);
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ROUND1(C,D,A,B,6,17,6);
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ROUND1(B,C,D,A,7,22,7);
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ROUND1(A,B,C,D,8,7,8);
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ROUND1(D,A,B,C,9,12,9);
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ROUND1(C,D,A,B,10,17,10);
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ROUND1(B,C,D,A,11,22,11);
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ROUND1(A,B,C,D,12,7,12);
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ROUND1(D,A,B,C,13,12,13);
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ROUND1(C,D,A,B,14,17,14);
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ROUND1(B,C,D,A,15,22,15);
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#define ROUND2(a,b,c,d,k,s,i) \
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a = b + MD5_ROL((a + G(b,c,d) + x[k] + T[i]),s)
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ROUND2(A,B,C,D,1,5,16);
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ROUND2(D,A,B,C,6,9,17);
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ROUND2(C,D,A,B,11,14,18);
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ROUND2(B,C,D,A,0,20,19);
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ROUND2(A,B,C,D,5,5,20);
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ROUND2(D,A,B,C,10,9,21);
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ROUND2(C,D,A,B,15,14,22);
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ROUND2(B,C,D,A,4,20,23);
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ROUND2(A,B,C,D,9,5,24);
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ROUND2(D,A,B,C,14,9,25);
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ROUND2(C,D,A,B,3,14,26);
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ROUND2(B,C,D,A,8,20,27);
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ROUND2(A,B,C,D,13,5,28);
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ROUND2(D,A,B,C,2,9,29);
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ROUND2(C,D,A,B,7,14,30);
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ROUND2(B,C,D,A,12,20,31);
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#define ROUND3(a,b,c,d,k,s,i) \
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a = b + MD5_ROL((a + H(b,c,d) + x[k] + T[i]),s)
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ROUND3(A,B,C,D,5,4,32);
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ROUND3(D,A,B,C,8,11,33);
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ROUND3(C,D,A,B,11,16,34);
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ROUND3(B,C,D,A,14,23,35);
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ROUND3(A,B,C,D,1,4,36);
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ROUND3(D,A,B,C,4,11,37);
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ROUND3(C,D,A,B,7,16,38);
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ROUND3(B,C,D,A,10,23,39);
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ROUND3(A,B,C,D,13,4,40);
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ROUND3(D,A,B,C,0,11,41);
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ROUND3(C,D,A,B,3,16,42);
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ROUND3(B,C,D,A,6,23,43);
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ROUND3(A,B,C,D,9,4,44);
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ROUND3(D,A,B,C,12,11,45);
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ROUND3(C,D,A,B,15,16,46);
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ROUND3(B,C,D,A,2,23,47);
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#define ROUND4(a,b,c,d,k,s,i) \
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a = b + MD5_ROL((a + I(b,c,d) + x[k] + T[i]),s)
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ROUND4(A,B,C,D,0,6,48);
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ROUND4(D,A,B,C,7,10,49);
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ROUND4(C,D,A,B,14,15,50);
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ROUND4(B,C,D,A,5,21,51);
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ROUND4(A,B,C,D,12,6,52);
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ROUND4(D,A,B,C,3,10,53);
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ROUND4(C,D,A,B,10,15,54);
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ROUND4(B,C,D,A,1,21,55);
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ROUND4(A,B,C,D,8,6,56);
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ROUND4(D,A,B,C,15,10,57);
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ROUND4(C,D,A,B,6,15,58);
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ROUND4(B,C,D,A,13,21,59);
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ROUND4(A,B,C,D,4,6,60);
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ROUND4(D,A,B,C,11,10,61);
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ROUND4(C,D,A,B,2,15,62);
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ROUND4(B,C,D,A,9,21,63);
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A += AA;
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B += BB;
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C += CC;
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D += DD;
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}
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union md5_endian ea, eb, ec, ed;
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ea.m_word=A;
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eb.m_word=B;
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ec.m_word=C;
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ed.m_word=D;
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m_digest[0]=ea.m_bytes.m_0;
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m_digest[1]=ea.m_bytes.m_1;
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m_digest[2]=ea.m_bytes.m_2;
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m_digest[3]=ea.m_bytes.m_3;
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m_digest[4]=eb.m_bytes.m_0;
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m_digest[5]=eb.m_bytes.m_1;
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m_digest[6]=eb.m_bytes.m_2;
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m_digest[7]=eb.m_bytes.m_3;
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m_digest[8]=ec.m_bytes.m_0;
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m_digest[9]=ec.m_bytes.m_1;
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m_digest[10]=ec.m_bytes.m_2;
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m_digest[11]=ec.m_bytes.m_3;
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m_digest[12]=ed.m_bytes.m_0;
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m_digest[13]=ed.m_bytes.m_1;
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m_digest[14]=ed.m_bytes.m_2;
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m_digest[15]=ed.m_bytes.m_3;
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return (m_digest);
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}
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