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+/* crypto/md/md5_dgst.c */
+/* Copyright (C) 1995-1997 Eric Young (eay@cryptsoft.com)
+ * All rights reserved.
+ *
+ * This package is an SSL implementation written
+ * by Eric Young (eay@cryptsoft.com).
+ * The implementation was written so as to conform with Netscapes SSL.
+ *
+ * This library is free for commercial and non-commercial use as long as
+ * the following conditions are aheared to. The following conditions
+ * apply to all code found in this distribution, be it the RC4, RSA,
+ * lhash, DES, etc., code; not just the SSL code. The SSL documentation
+ * included with this distribution is covered by the same copyright terms
+ * except that the holder is Tim Hudson (tjh@cryptsoft.com).
+ *
+ * Copyright remains Eric Young's, and as such any Copyright notices in
+ * the code are not to be removed.
+ * If this package is used in a product, Eric Young should be given attribution
+ * as the author of the parts of the library used.
+ * This can be in the form of a textual message at program startup or
+ * in documentation (online or textual) provided with the package.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * "This product includes cryptographic software written by
+ * Eric Young (eay@cryptsoft.com)"
+ * The word 'cryptographic' can be left out if the rouines from the library
+ * being used are not cryptographic related :-).
+ * 4. If you include any Windows specific code (or a derivative thereof) from
+ * the apps directory (application code) you must include an acknowledgement:
+ * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * The licence and distribution terms for any publically available version or
+ * derivative of this code cannot be changed. i.e. this code cannot simply be
+ * copied and put under another distribution licence
+ * [including the GNU Public Licence.]
+ */
+
+#ifdef USE_MD5 /*%< Added by ogud@tis.com 1998/1/26 */
+#include <port_before.h>
+#ifndef HAVE_MD5
+#include <stdio.h>
+#include "md5_locl.h"
+#include <port_after.h>
+
+const char *MD5_version="MD5 part of SSLeay 0.8.1 19-Jul-1997";
+
+/*! \file
+ * \brief
+ * Implemented from RFC1321 The MD5 Message-Digest Algorithm
+ */
+
+#define INIT_DATA_A (unsigned long)0x67452301L
+#define INIT_DATA_B (unsigned long)0xefcdab89L
+#define INIT_DATA_C (unsigned long)0x98badcfeL
+#define INIT_DATA_D (unsigned long)0x10325476L
+
+#ifndef NOPROTO
+static void md5_block(MD5_CTX *c, unsigned long *p);
+#else
+static void md5_block();
+#endif
+
+void MD5_Init(c)
+MD5_CTX *c;
+ {
+ c->A=INIT_DATA_A;
+ c->B=INIT_DATA_B;
+ c->C=INIT_DATA_C;
+ c->D=INIT_DATA_D;
+ c->Nl=0;
+ c->Nh=0;
+ c->num=0;
+ }
+
+void MD5_Update(c, data, len)
+MD5_CTX *c;
+register const unsigned char *data;
+unsigned long len;
+ {
+ register ULONG *p;
+ int sw,sc;
+ ULONG l;
+
+ if (len == 0U) return;
+
+ l=(c->Nl+(len<<3))&0xffffffffL;
+ /* 95-05-24 eay Fixed a bug with the overflow handling, thanks to
+ * Wei Dai <weidai@eskimo.com> for pointing it out. */
+ if (l < c->Nl) /*%< overflow */
+ c->Nh++;
+ c->Nh+=(len>>29);
+ c->Nl=l;
+
+ if (c->num != 0)
+ {
+ p=c->data;
+ sw=c->num>>2;
+ sc=c->num&0x03;
+
+ if ((c->num+len) >= (size_t)MD5_CBLOCK)
+ {
+ l= p[sw];
+ p_c2l(data,l,sc);
+ p[sw++]=l;
+ for (; sw<MD5_LBLOCK; sw++)
+ {
+ c2l(data,l);
+ p[sw]=l;
+ }
+ len-=(MD5_CBLOCK-c->num);
+
+ md5_block(c,p);
+ c->num=0;
+ /* drop through and do the rest */
+ }
+ else
+ {
+ int ew,ec;
+
+ c->num+=(int)len;
+ if ((sc+len) < 4U) /*%< ugly, add char's to a word */
+ {
+ l= p[sw];
+ p_c2l_p(data,l,sc,len);
+ p[sw]=l;
+ }
+ else
+ {
+ ew=(c->num>>2);
+ ec=(c->num&0x03);
+ l= p[sw];
+ p_c2l(data,l,sc);
+ p[sw++]=l;
+ for (; sw < ew; sw++)
+ { c2l(data,l); p[sw]=l; }
+ if (ec)
+ {
+ c2l_p(data,l,ec);
+ p[sw]=l;
+ }
+ }
+ return;
+ }
+ }
+ /* we now can process the input data in blocks of MD5_CBLOCK
+ * chars and save the leftovers to c->data. */
+ p=c->data;
+ while (len >= (size_t)MD5_CBLOCK)
+ {
+#if defined(L_ENDIAN) || defined(B_ENDIAN)
+ memcpy(p,data,MD5_CBLOCK);
+ data+=MD5_CBLOCK;
+#ifdef B_ENDIAN
+ for (sw=(MD5_LBLOCK/4); sw; sw--)
+ {
+ Endian_Reverse32(p[0]);
+ Endian_Reverse32(p[1]);
+ Endian_Reverse32(p[2]);
+ Endian_Reverse32(p[3]);
+ p+=4;
+ }
+#endif
+#else
+ for (sw=(MD5_LBLOCK/4); sw; sw--)
+ {
+ c2l(data,l); *(p++)=l;
+ c2l(data,l); *(p++)=l;
+ c2l(data,l); *(p++)=l;
+ c2l(data,l); *(p++)=l;
+ }
+#endif
+ p=c->data;
+ md5_block(c,p);
+ len-=MD5_CBLOCK;
+ }
+ sc=(int)len;
+ c->num=sc;
+ if (sc)
+ {
+ sw=sc>>2; /*%< words to copy */
+#ifdef L_ENDIAN
+ p[sw]=0;
+ memcpy(p,data,sc);
+#else
+ sc&=0x03;
+ for ( ; sw; sw--)
+ { c2l(data,l); *(p++)=l; }
+ c2l_p(data,l,sc);
+ *p=l;
+#endif
+ }
+ }
+
+static void md5_block(c, X)
+MD5_CTX *c;
+register ULONG *X;
+ {
+ register ULONG A,B,C,D;
+
+ A=c->A;
+ B=c->B;
+ C=c->C;
+ D=c->D;
+
+ /* Round 0 */
+ R0(A,B,C,D,X[ 0], 7,0xd76aa478L);
+ R0(D,A,B,C,X[ 1],12,0xe8c7b756L);
+ R0(C,D,A,B,X[ 2],17,0x242070dbL);
+ R0(B,C,D,A,X[ 3],22,0xc1bdceeeL);
+ R0(A,B,C,D,X[ 4], 7,0xf57c0fafL);
+ R0(D,A,B,C,X[ 5],12,0x4787c62aL);
+ R0(C,D,A,B,X[ 6],17,0xa8304613L);
+ R0(B,C,D,A,X[ 7],22,0xfd469501L);
+ R0(A,B,C,D,X[ 8], 7,0x698098d8L);
+ R0(D,A,B,C,X[ 9],12,0x8b44f7afL);
+ R0(C,D,A,B,X[10],17,0xffff5bb1L);
+ R0(B,C,D,A,X[11],22,0x895cd7beL);
+ R0(A,B,C,D,X[12], 7,0x6b901122L);
+ R0(D,A,B,C,X[13],12,0xfd987193L);
+ R0(C,D,A,B,X[14],17,0xa679438eL);
+ R0(B,C,D,A,X[15],22,0x49b40821L);
+ /* Round 1 */
+ R1(A,B,C,D,X[ 1], 5,0xf61e2562L);
+ R1(D,A,B,C,X[ 6], 9,0xc040b340L);
+ R1(C,D,A,B,X[11],14,0x265e5a51L);
+ R1(B,C,D,A,X[ 0],20,0xe9b6c7aaL);
+ R1(A,B,C,D,X[ 5], 5,0xd62f105dL);
+ R1(D,A,B,C,X[10], 9,0x02441453L);
+ R1(C,D,A,B,X[15],14,0xd8a1e681L);
+ R1(B,C,D,A,X[ 4],20,0xe7d3fbc8L);
+ R1(A,B,C,D,X[ 9], 5,0x21e1cde6L);
+ R1(D,A,B,C,X[14], 9,0xc33707d6L);
+ R1(C,D,A,B,X[ 3],14,0xf4d50d87L);
+ R1(B,C,D,A,X[ 8],20,0x455a14edL);
+ R1(A,B,C,D,X[13], 5,0xa9e3e905L);
+ R1(D,A,B,C,X[ 2], 9,0xfcefa3f8L);
+ R1(C,D,A,B,X[ 7],14,0x676f02d9L);
+ R1(B,C,D,A,X[12],20,0x8d2a4c8aL);
+ /* Round 2 */
+ R2(A,B,C,D,X[ 5], 4,0xfffa3942L);
+ R2(D,A,B,C,X[ 8],11,0x8771f681L);
+ R2(C,D,A,B,X[11],16,0x6d9d6122L);
+ R2(B,C,D,A,X[14],23,0xfde5380cL);
+ R2(A,B,C,D,X[ 1], 4,0xa4beea44L);
+ R2(D,A,B,C,X[ 4],11,0x4bdecfa9L);
+ R2(C,D,A,B,X[ 7],16,0xf6bb4b60L);
+ R2(B,C,D,A,X[10],23,0xbebfbc70L);
+ R2(A,B,C,D,X[13], 4,0x289b7ec6L);
+ R2(D,A,B,C,X[ 0],11,0xeaa127faL);
+ R2(C,D,A,B,X[ 3],16,0xd4ef3085L);
+ R2(B,C,D,A,X[ 6],23,0x04881d05L);
+ R2(A,B,C,D,X[ 9], 4,0xd9d4d039L);
+ R2(D,A,B,C,X[12],11,0xe6db99e5L);
+ R2(C,D,A,B,X[15],16,0x1fa27cf8L);
+ R2(B,C,D,A,X[ 2],23,0xc4ac5665L);
+ /* Round 3 */
+ R3(A,B,C,D,X[ 0], 6,0xf4292244L);
+ R3(D,A,B,C,X[ 7],10,0x432aff97L);
+ R3(C,D,A,B,X[14],15,0xab9423a7L);
+ R3(B,C,D,A,X[ 5],21,0xfc93a039L);
+ R3(A,B,C,D,X[12], 6,0x655b59c3L);
+ R3(D,A,B,C,X[ 3],10,0x8f0ccc92L);
+ R3(C,D,A,B,X[10],15,0xffeff47dL);
+ R3(B,C,D,A,X[ 1],21,0x85845dd1L);
+ R3(A,B,C,D,X[ 8], 6,0x6fa87e4fL);
+ R3(D,A,B,C,X[15],10,0xfe2ce6e0L);
+ R3(C,D,A,B,X[ 6],15,0xa3014314L);
+ R3(B,C,D,A,X[13],21,0x4e0811a1L);
+ R3(A,B,C,D,X[ 4], 6,0xf7537e82L);
+ R3(D,A,B,C,X[11],10,0xbd3af235L);
+ R3(C,D,A,B,X[ 2],15,0x2ad7d2bbL);
+ R3(B,C,D,A,X[ 9],21,0xeb86d391L);
+
+ c->A+=A&0xffffffffL;
+ c->B+=B&0xffffffffL;
+ c->C+=C&0xffffffffL;
+ c->D+=D&0xffffffffL;
+ }
+
+void MD5_Final(md, c)
+unsigned char *md;
+MD5_CTX *c;
+ {
+ register int i,j;
+ register ULONG l;
+ register ULONG *p;
+ static unsigned char end[4]={0x80,0x00,0x00,0x00};
+ unsigned char *cp=end;
+
+ /* c->num should definitly have room for at least one more byte. */
+ p=c->data;
+ j=c->num;
+ i=j>>2;
+
+ /* purify often complains about the following line as an
+ * Uninitialized Memory Read. While this can be true, the
+ * following p_c2l macro will reset l when that case is true.
+ * This is because j&0x03 contains the number of 'valid' bytes
+ * already in p[i]. If and only if j&0x03 == 0, the UMR will
+ * occur but this is also the only time p_c2l will do
+ * l= *(cp++) instead of l|= *(cp++)
+ * Many thanks to Alex Tang <altitude@cic.net> for pickup this
+ * 'potential bug' */
+#ifdef PURIFY
+ if ((j&0x03) == 0) p[i]=0;
+#endif
+ l=p[i];
+ p_c2l(cp,l,j&0x03);
+ p[i]=l;
+ i++;
+ /* i is the next 'undefined word' */
+ if (c->num >= MD5_LAST_BLOCK)
+ {
+ for (; i<MD5_LBLOCK; i++)
+ p[i]=0;
+ md5_block(c,p);
+ i=0;
+ }
+ for (; i<(MD5_LBLOCK-2); i++)
+ p[i]=0;
+ p[MD5_LBLOCK-2]=c->Nl;
+ p[MD5_LBLOCK-1]=c->Nh;
+ md5_block(c,p);
+ cp=md;
+ l=c->A; l2c(l,cp);
+ l=c->B; l2c(l,cp);
+ l=c->C; l2c(l,cp);
+ l=c->D; l2c(l,cp);
+
+ /* clear stuff, md5_block may be leaving some stuff on the stack
+ * but I'm not worried :-) */
+ c->num=0;
+/* memset((char *)&c,0,sizeof(c));*/
+ }
+
+#ifdef undef
+int printit(l)
+unsigned long *l;
+ {
+ int i,ii;
+
+ for (i=0; i<2; i++)
+ {
+ for (ii=0; ii<8; ii++)
+ {
+ fprintf(stderr,"%08lx ",l[i*8+ii]);
+ }
+ fprintf(stderr,"\n");
+ }
+ }
+#endif
+#endif /* HAVE_MD5 */
+#endif /* USE_MD5 */
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