/* $OpenBSD: md4_dgst.c,v 1.16 2015/09/14 01:45:03 doug Exp $ */

/* Copyright (C) 1995-1998 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.]

 */

#include <stdio.h>

#include <openssl/opensslv.h>

#include <openssl/crypto.h>

#include "md4_locl.h"

/* Implemented from RFC1186 The MD4 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

int MD4_Init(MD4_CTX *c)

  {

  memset (c,0,sizeof(*c));

  c->A=INIT_DATA_A;

  c->B=INIT_DATA_B;

  c->C=INIT_DATA_C;

  c->D=INIT_DATA_D;

  return 1;

  }

#ifndef md4_block_data_order

#ifdef X

#undef X

#endif

void md4_block_data_order (MD4_CTX *c, const void *data_, size_t num)

  {

  const unsigned char *data=data_;

  unsigned MD32_REG_T A,B,C,D,l;

#ifndef MD32_XARRAY

  /* See comment in crypto/sha/sha_locl.h for details. */

  unsigned MD32_REG_T XX0, XX1, XX2, XX3, XX4, XX5, XX6, XX7,

        XX8, XX9,XX10,XX11,XX12,XX13,XX14,XX15;

# define X(i) XX##i

#else

  MD4_LONG XX[MD4_LBLOCK];

# define X(i) XX[i]

#endif

  A=c->A;

  B=c->B;

  C=c->C;

  D=c->D;

  for (;num--;)

    {

  HOST_c2l(data,l); X( 0)=l;

  HOST_c2l(data,l); X( 1)=l;

  /* Round 0 */

  R0(A,B,C,D,X( 0), 3,0); HOST_c2l(data,l); X( 2)=l;

  R0(D,A,B,C,X( 1), 7,0); HOST_c2l(data,l); X( 3)=l;

  R0(C,D,A,B,X( 2),11,0); HOST_c2l(data,l); X( 4)=l;

  R0(B,C,D,A,X( 3),19,0); HOST_c2l(data,l); X( 5)=l;

  R0(A,B,C,D,X( 4), 3,0); HOST_c2l(data,l); X( 6)=l;

  R0(D,A,B,C,X( 5), 7,0); HOST_c2l(data,l); X( 7)=l;

  R0(C,D,A,B,X( 6),11,0); HOST_c2l(data,l); X( 8)=l;

  R0(B,C,D,A,X( 7),19,0); HOST_c2l(data,l); X( 9)=l;

  R0(A,B,C,D,X( 8), 3,0); HOST_c2l(data,l); X(10)=l;

  R0(D,A,B,C,X( 9), 7,0); HOST_c2l(data,l); X(11)=l;

  R0(C,D,A,B,X(10),11,0); HOST_c2l(data,l); X(12)=l;

  R0(B,C,D,A,X(11),19,0); HOST_c2l(data,l); X(13)=l;

  R0(A,B,C,D,X(12), 3,0); HOST_c2l(data,l); X(14)=l;

  R0(D,A,B,C,X(13), 7,0); HOST_c2l(data,l); X(15)=l;

  R0(C,D,A,B,X(14),11,0);

  R0(B,C,D,A,X(15),19,0);

  /* Round 1 */

  R1(A,B,C,D,X( 0), 3,0x5A827999L);

  R1(D,A,B,C,X( 4), 5,0x5A827999L);

  R1(C,D,A,B,X( 8), 9,0x5A827999L);

  R1(B,C,D,A,X(12),13,0x5A827999L);

  R1(A,B,C,D,X( 1), 3,0x5A827999L);

  R1(D,A,B,C,X( 5), 5,0x5A827999L);

  R1(C,D,A,B,X( 9), 9,0x5A827999L);

  R1(B,C,D,A,X(13),13,0x5A827999L);

  R1(A,B,C,D,X( 2), 3,0x5A827999L);

  R1(D,A,B,C,X( 6), 5,0x5A827999L);

  R1(C,D,A,B,X(10), 9,0x5A827999L);

  R1(B,C,D,A,X(14),13,0x5A827999L);

  R1(A,B,C,D,X( 3), 3,0x5A827999L);

  R1(D,A,B,C,X( 7), 5,0x5A827999L);

  R1(C,D,A,B,X(11), 9,0x5A827999L);

  R1(B,C,D,A,X(15),13,0x5A827999L);

  /* Round 2 */

  R2(A,B,C,D,X( 0), 3,0x6ED9EBA1L);

  R2(D,A,B,C,X( 8), 9,0x6ED9EBA1L);

  R2(C,D,A,B,X( 4),11,0x6ED9EBA1L);

  R2(B,C,D,A,X(12),15,0x6ED9EBA1L);

  R2(A,B,C,D,X( 2), 3,0x6ED9EBA1L);

  R2(D,A,B,C,X(10), 9,0x6ED9EBA1L);

  R2(C,D,A,B,X( 6),11,0x6ED9EBA1L);

  R2(B,C,D,A,X(14),15,0x6ED9EBA1L);

  R2(A,B,C,D,X( 1), 3,0x6ED9EBA1L);

  R2(D,A,B,C,X( 9), 9,0x6ED9EBA1L);

  R2(C,D,A,B,X( 5),11,0x6ED9EBA1L);

  R2(B,C,D,A,X(13),15,0x6ED9EBA1L);

  R2(A,B,C,D,X( 3), 3,0x6ED9EBA1L);

  R2(D,A,B,C,X(11), 9,0x6ED9EBA1L);

  R2(C,D,A,B,X( 7),11,0x6ED9EBA1L);

  R2(B,C,D,A,X(15),15,0x6ED9EBA1L);

  A = c->A += A;

  B = c->B += B;

  C = c->C += C;

  D = c->D += D;

    }

  }

#endif