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matty |
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/* crypto/md5/md5_dgst.c */ |
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/* Copyright (C) 1995-1997 Eric Young (eay@cryptsoft.com) |
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* All rights reserved. |
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* |
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* This package is an SSL implementation written |
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* by Eric Young (eay@cryptsoft.com). |
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* The implementation was written so as to conform with Netscapes SSL. |
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* |
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* This library is free for commercial and non-commercial use as long as |
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* the following conditions are aheared to. The following conditions |
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* apply to all code found in this distribution, be it the RC4, RSA, |
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation |
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* included with this distribution is covered by the same copyright terms |
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* except that the holder is Tim Hudson (tjh@cryptsoft.com). |
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* |
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* Copyright remains Eric Young's, and as such any Copyright notices in |
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* the code are not to be removed. |
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* If this package is used in a product, Eric Young should be given attribution |
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* as the author of the parts of the library used. |
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* This can be in the form of a textual message at program startup or |
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* in documentation (online or textual) provided with the package. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. All advertising materials mentioning features or use of this software |
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* must display the following acknowledgement: |
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* "This product includes cryptographic software written by |
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* Eric Young (eay@cryptsoft.com)" |
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* The word 'cryptographic' can be left out if the rouines from the library |
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* being used are not cryptographic related :-). |
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* 4. If you include any Windows specific code (or a derivative thereof) from |
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* the apps directory (application code) you must include an acknowledgement: |
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" |
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* |
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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* |
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* The licence and distribution terms for any publically available version or |
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* derivative of this code cannot be changed. i.e. this code cannot simply be |
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* copied and put under another distribution licence |
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* [including the GNU Public Licence.] |
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*/ |
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#include <stdio.h> |
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#include "md5_locl.h" |
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/* char *MD5_version="MD5 part of SSLeay 0.8.2b 08-Jan-1998"; */ |
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/* Implemented from RFC1321 The MD5 Message-Digest Algorithm |
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*/ |
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#define INIT_DATA_A (unsigned long)0x67452301L |
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#define INIT_DATA_B (unsigned long)0xefcdab89L |
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#define INIT_DATA_C (unsigned long)0x98badcfeL |
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#define INIT_DATA_D (unsigned long)0x10325476L |
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#ifndef NOPROTO |
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# ifdef MD5_ASM |
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void md5_block_x86(MD5_CTX *c, unsigned long *p,int num); |
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# define md5_block md5_block_x86 |
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# else |
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static void md5_block(MD5_CTX *c, unsigned long *p,int num); |
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# endif |
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#else |
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# ifdef MD5_ASM |
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void md5_block_x86(); |
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# define md5_block md5_block_x86 |
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# else |
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static void md5_block(); |
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# endif |
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#endif |
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void MD5_Init(c) |
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MD5_CTX *c; |
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{ |
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c->A=INIT_DATA_A; |
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c->B=INIT_DATA_B; |
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c->C=INIT_DATA_C; |
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c->D=INIT_DATA_D; |
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c->Nl=0; |
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c->Nh=0; |
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c->num=0; |
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} |
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void MD5_Update(c, data, len) |
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MD5_CTX *c; |
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register unsigned char *data; |
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unsigned long len; |
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{ |
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register ULONG *p; |
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int sw,sc; |
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ULONG l; |
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if (len == 0) return; |
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l=(c->Nl+(len<<3))&0xffffffffL; |
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/* 95-05-24 eay Fixed a bug with the overflow handling, thanks to |
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* Wei Dai <weidai@eskimo.com> for pointing it out. */ |
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if (l < c->Nl) /* overflow */ |
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c->Nh++; |
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c->Nh+=(len>>29); |
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c->Nl=l; |
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if (c->num != 0) |
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{ |
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p=c->data; |
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sw=c->num>>2; |
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sc=c->num&0x03; |
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if ((c->num+len) >= MD5_CBLOCK) |
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{ |
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l= p[sw]; |
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p_c2l(data,l,sc); |
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p[sw++]=l; |
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for (; sw<MD5_LBLOCK; sw++) |
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{ |
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c2l(data,l); |
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p[sw]=l; |
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} |
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len-=(MD5_CBLOCK-c->num); |
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md5_block(c,p,64); |
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c->num=0; |
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/* drop through and do the rest */ |
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} |
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else |
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{ |
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int ew,ec; |
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c->num+=(int)len; |
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if ((sc+len) < 4) /* ugly, add char's to a word */ |
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{ |
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l= p[sw]; |
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p_c2l_p(data,l,sc,len); |
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p[sw]=l; |
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} |
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else |
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{ |
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ew=(c->num>>2); |
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ec=(c->num&0x03); |
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l= p[sw]; |
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p_c2l(data,l,sc); |
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p[sw++]=l; |
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for (; sw < ew; sw++) |
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{ c2l(data,l); p[sw]=l; } |
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if (ec) |
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{ |
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c2l_p(data,l,ec); |
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p[sw]=l; |
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} |
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} |
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return; |
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} |
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} |
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/* we now can process the input data in blocks of MD5_CBLOCK |
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* chars and save the leftovers to c->data. */ |
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#ifdef L_ENDIAN |
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if ((((unsigned long)data)%sizeof(ULONG)) == 0) |
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{ |
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sw=(int)len/MD5_CBLOCK; |
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if (sw > 0) |
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{ |
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sw*=MD5_CBLOCK; |
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md5_block(c,(ULONG *)data,sw); |
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data+=sw; |
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len-=sw; |
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} |
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} |
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#endif |
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p=c->data; |
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while (len >= MD5_CBLOCK) |
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{ |
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#if defined(L_ENDIAN) || defined(B_ENDIAN) |
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if (p != (unsigned long *)data) |
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memcpy(p,data,MD5_CBLOCK); |
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data+=MD5_CBLOCK; |
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#ifdef B_ENDIAN |
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for (sw=(MD5_LBLOCK/4); sw; sw--) |
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{ |
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Endian_Reverse32(p[0]); |
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Endian_Reverse32(p[1]); |
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Endian_Reverse32(p[2]); |
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Endian_Reverse32(p[3]); |
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p+=4; |
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} |
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#endif |
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#else |
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for (sw=(MD5_LBLOCK/4); sw; sw--) |
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{ |
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c2l(data,l); *(p++)=l; |
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c2l(data,l); *(p++)=l; |
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c2l(data,l); *(p++)=l; |
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c2l(data,l); *(p++)=l; |
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} |
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#endif |
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p=c->data; |
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md5_block(c,p,64); |
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len-=MD5_CBLOCK; |
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} |
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sc=(int)len; |
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c->num=sc; |
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if (sc) |
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{ |
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sw=sc>>2; /* words to copy */ |
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#ifdef L_ENDIAN |
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p[sw]=0; |
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memcpy(p,data,sc); |
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#else |
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sc&=0x03; |
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for ( ; sw; sw--) |
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{ c2l(data,l); *(p++)=l; } |
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c2l_p(data,l,sc); |
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*p=l; |
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#endif |
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} |
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} |
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void MD5_Transform(c,b) |
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MD5_CTX *c; |
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unsigned char *b; |
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{ |
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ULONG p[16]; |
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#if !defined(L_ENDIAN) |
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ULONG *q; |
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int i; |
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#endif |
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#if defined(B_ENDIAN) || defined(L_ENDIAN) |
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memcpy(p,b,64); |
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#ifdef B_ENDIAN |
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q=p; |
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for (i=(MD5_LBLOCK/4); i; i--) |
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{ |
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Endian_Reverse32(q[0]); |
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Endian_Reverse32(q[1]); |
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Endian_Reverse32(q[2]); |
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Endian_Reverse32(q[3]); |
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q+=4; |
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} |
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#endif |
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#else |
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q=p; |
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for (i=(MD5_LBLOCK/4); i; i--) |
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{ |
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ULONG l; |
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c2l(b,l); *(q++)=l; |
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c2l(b,l); *(q++)=l; |
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c2l(b,l); *(q++)=l; |
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c2l(b,l); *(q++)=l; |
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} |
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#endif |
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md5_block(c,p,64); |
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} |
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#ifndef MD5_ASM |
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static void md5_block(c, X, num) |
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MD5_CTX *c; |
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register ULONG *X; |
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int num; |
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{ |
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register ULONG A,B,C,D; |
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A=c->A; |
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B=c->B; |
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C=c->C; |
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D=c->D; |
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for (;;) |
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{ |
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/* Round 0 */ |
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R0(A,B,C,D,X[ 0], 7,0xd76aa478L); |
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R0(D,A,B,C,X[ 1],12,0xe8c7b756L); |
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R0(C,D,A,B,X[ 2],17,0x242070dbL); |
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R0(B,C,D,A,X[ 3],22,0xc1bdceeeL); |
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R0(A,B,C,D,X[ 4], 7,0xf57c0fafL); |
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R0(D,A,B,C,X[ 5],12,0x4787c62aL); |
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R0(C,D,A,B,X[ 6],17,0xa8304613L); |
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R0(B,C,D,A,X[ 7],22,0xfd469501L); |
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R0(A,B,C,D,X[ 8], 7,0x698098d8L); |
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R0(D,A,B,C,X[ 9],12,0x8b44f7afL); |
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R0(C,D,A,B,X[10],17,0xffff5bb1L); |
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R0(B,C,D,A,X[11],22,0x895cd7beL); |
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R0(A,B,C,D,X[12], 7,0x6b901122L); |
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R0(D,A,B,C,X[13],12,0xfd987193L); |
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R0(C,D,A,B,X[14],17,0xa679438eL); |
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R0(B,C,D,A,X[15],22,0x49b40821L); |
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/* Round 1 */ |
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R1(A,B,C,D,X[ 1], 5,0xf61e2562L); |
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R1(D,A,B,C,X[ 6], 9,0xc040b340L); |
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R1(C,D,A,B,X[11],14,0x265e5a51L); |
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R1(B,C,D,A,X[ 0],20,0xe9b6c7aaL); |
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R1(A,B,C,D,X[ 5], 5,0xd62f105dL); |
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R1(D,A,B,C,X[10], 9,0x02441453L); |
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R1(C,D,A,B,X[15],14,0xd8a1e681L); |
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R1(B,C,D,A,X[ 4],20,0xe7d3fbc8L); |
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R1(A,B,C,D,X[ 9], 5,0x21e1cde6L); |
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R1(D,A,B,C,X[14], 9,0xc33707d6L); |
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R1(C,D,A,B,X[ 3],14,0xf4d50d87L); |
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R1(B,C,D,A,X[ 8],20,0x455a14edL); |
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R1(A,B,C,D,X[13], 5,0xa9e3e905L); |
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R1(D,A,B,C,X[ 2], 9,0xfcefa3f8L); |
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R1(C,D,A,B,X[ 7],14,0x676f02d9L); |
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R1(B,C,D,A,X[12],20,0x8d2a4c8aL); |
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/* Round 2 */ |
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R2(A,B,C,D,X[ 5], 4,0xfffa3942L); |
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R2(D,A,B,C,X[ 8],11,0x8771f681L); |
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R2(C,D,A,B,X[11],16,0x6d9d6122L); |
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R2(B,C,D,A,X[14],23,0xfde5380cL); |
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R2(A,B,C,D,X[ 1], 4,0xa4beea44L); |
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R2(D,A,B,C,X[ 4],11,0x4bdecfa9L); |
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R2(C,D,A,B,X[ 7],16,0xf6bb4b60L); |
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R2(B,C,D,A,X[10],23,0xbebfbc70L); |
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R2(A,B,C,D,X[13], 4,0x289b7ec6L); |
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R2(D,A,B,C,X[ 0],11,0xeaa127faL); |
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R2(C,D,A,B,X[ 3],16,0xd4ef3085L); |
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R2(B,C,D,A,X[ 6],23,0x04881d05L); |
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R2(A,B,C,D,X[ 9], 4,0xd9d4d039L); |
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R2(D,A,B,C,X[12],11,0xe6db99e5L); |
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R2(C,D,A,B,X[15],16,0x1fa27cf8L); |
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R2(B,C,D,A,X[ 2],23,0xc4ac5665L); |
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/* Round 3 */ |
| 337 |
|
|
R3(A,B,C,D,X[ 0], 6,0xf4292244L); |
| 338 |
|
|
R3(D,A,B,C,X[ 7],10,0x432aff97L); |
| 339 |
|
|
R3(C,D,A,B,X[14],15,0xab9423a7L); |
| 340 |
|
|
R3(B,C,D,A,X[ 5],21,0xfc93a039L); |
| 341 |
|
|
R3(A,B,C,D,X[12], 6,0x655b59c3L); |
| 342 |
|
|
R3(D,A,B,C,X[ 3],10,0x8f0ccc92L); |
| 343 |
|
|
R3(C,D,A,B,X[10],15,0xffeff47dL); |
| 344 |
|
|
R3(B,C,D,A,X[ 1],21,0x85845dd1L); |
| 345 |
|
|
R3(A,B,C,D,X[ 8], 6,0x6fa87e4fL); |
| 346 |
|
|
R3(D,A,B,C,X[15],10,0xfe2ce6e0L); |
| 347 |
|
|
R3(C,D,A,B,X[ 6],15,0xa3014314L); |
| 348 |
|
|
R3(B,C,D,A,X[13],21,0x4e0811a1L); |
| 349 |
|
|
R3(A,B,C,D,X[ 4], 6,0xf7537e82L); |
| 350 |
|
|
R3(D,A,B,C,X[11],10,0xbd3af235L); |
| 351 |
|
|
R3(C,D,A,B,X[ 2],15,0x2ad7d2bbL); |
| 352 |
|
|
R3(B,C,D,A,X[ 9],21,0xeb86d391L); |
| 353 |
|
|
|
| 354 |
|
|
A+=c->A&0xffffffffL; |
| 355 |
|
|
B+=c->B&0xffffffffL; |
| 356 |
|
|
c->A=A; |
| 357 |
|
|
c->B=B; |
| 358 |
|
|
C+=c->C&0xffffffffL; |
| 359 |
|
|
D+=c->D&0xffffffffL; |
| 360 |
|
|
c->C=C; |
| 361 |
|
|
c->D=D; |
| 362 |
|
|
X+=16; |
| 363 |
|
|
num-=64; |
| 364 |
|
|
if (num <= 0) break; |
| 365 |
|
|
} |
| 366 |
|
|
} |
| 367 |
|
|
#endif |
| 368 |
|
|
|
| 369 |
|
|
void MD5_Final(md, c) |
| 370 |
|
|
unsigned char *md; |
| 371 |
|
|
MD5_CTX *c; |
| 372 |
|
|
{ |
| 373 |
|
|
register int i,j; |
| 374 |
|
|
register ULONG l; |
| 375 |
|
|
register ULONG *p; |
| 376 |
|
|
static unsigned char end[4]={0x80,0x00,0x00,0x00}; |
| 377 |
|
|
unsigned char *cp=end; |
| 378 |
|
|
|
| 379 |
|
|
/* c->num should definitly have room for at least one more byte. */ |
| 380 |
|
|
p=c->data; |
| 381 |
|
|
j=c->num; |
| 382 |
|
|
i=j>>2; |
| 383 |
|
|
|
| 384 |
|
|
/* purify often complains about the following line as an |
| 385 |
|
|
* Uninitialized Memory Read. While this can be true, the |
| 386 |
|
|
* following p_c2l macro will reset l when that case is true. |
| 387 |
|
|
* This is because j&0x03 contains the number of 'valid' bytes |
| 388 |
|
|
* already in p[i]. If and only if j&0x03 == 0, the UMR will |
| 389 |
|
|
* occur but this is also the only time p_c2l will do |
| 390 |
|
|
* l= *(cp++) instead of l|= *(cp++) |
| 391 |
|
|
* Many thanks to Alex Tang <altitude@cic.net> for pickup this |
| 392 |
|
|
* 'potential bug' */ |
| 393 |
|
|
#ifdef PURIFY |
| 394 |
|
|
if ((j&0x03) == 0) p[i]=0; |
| 395 |
|
|
#endif |
| 396 |
|
|
l=p[i]; |
| 397 |
|
|
p_c2l(cp,l,j&0x03); |
| 398 |
|
|
p[i]=l; |
| 399 |
|
|
i++; |
| 400 |
|
|
/* i is the next 'undefined word' */ |
| 401 |
|
|
if (c->num >= MD5_LAST_BLOCK) |
| 402 |
|
|
{ |
| 403 |
|
|
for (; i<MD5_LBLOCK; i++) |
| 404 |
|
|
p[i]=0; |
| 405 |
|
|
md5_block(c,p,64); |
| 406 |
|
|
i=0; |
| 407 |
|
|
} |
| 408 |
|
|
for (; i<(MD5_LBLOCK-2); i++) |
| 409 |
|
|
p[i]=0; |
| 410 |
|
|
p[MD5_LBLOCK-2]=c->Nl; |
| 411 |
|
|
p[MD5_LBLOCK-1]=c->Nh; |
| 412 |
|
|
md5_block(c,p,64); |
| 413 |
|
|
cp=md; |
| 414 |
|
|
l=c->A; l2c(l,cp); |
| 415 |
|
|
l=c->B; l2c(l,cp); |
| 416 |
|
|
l=c->C; l2c(l,cp); |
| 417 |
|
|
l=c->D; l2c(l,cp); |
| 418 |
|
|
|
| 419 |
|
|
/* clear stuff, md5_block may be leaving some stuff on the stack |
| 420 |
|
|
* but I'm not worried :-) */ |
| 421 |
|
|
c->num=0; |
| 422 |
|
|
/* memset((char *)&c,0,sizeof(c));*/ |
| 423 |
|
|
} |
| 424 |
|
|
|
| 425 |
|
|
#ifdef undef |
| 426 |
|
|
int printit(l) |
| 427 |
|
|
unsigned long *l; |
| 428 |
|
|
{ |
| 429 |
|
|
int i,ii; |
| 430 |
|
|
|
| 431 |
|
|
for (i=0; i<2; i++) |
| 432 |
|
|
{ |
| 433 |
|
|
for (ii=0; ii<8; ii++) |
| 434 |
|
|
{ |
| 435 |
|
|
fprintf(stderr,"%08lx ",l[i*8+ii]); |
| 436 |
|
|
} |
| 437 |
|
|
fprintf(stderr,"\n"); |
| 438 |
|
|
} |
| 439 |
|
|
} |
| 440 |
|
|
#endif |
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