GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libcrypto/crypto/../../libssl/src/crypto/des/ede_cbcm_enc.c Lines: 82 82 100.0 %
Date: 2016-12-06 Branches: 12 28 42.9 %

Line Branch Exec Source
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/* $OpenBSD: ede_cbcm_enc.c,v 1.6 2014/10/28 07:35:58 jsg Exp $ */
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/* Written by Ben Laurie <ben@algroup.co.uk> for the OpenSSL
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 * project 13 Feb 1999.
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 */
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/* ====================================================================
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 * Copyright (c) 1999 The OpenSSL Project.  All rights reserved.
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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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 *
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 * 1. Redistributions of source code must retain the above copyright
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 *    notice, this list of conditions and the following disclaimer.
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 *
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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
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 *    the documentation and/or other materials provided with the
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 *    distribution.
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 *
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 * 3. All advertising materials mentioning features or use of this
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 *    software must display the following acknowledgment:
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 *    "This product includes software developed by the OpenSSL Project
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 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
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 *
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 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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 *    endorse or promote products derived from this software without
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 *    prior written permission. For written permission, please contact
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 *    licensing@OpenSSL.org.
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 *
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 * 5. Products derived from this software may not be called "OpenSSL"
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 *    nor may "OpenSSL" appear in their names without prior written
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 *    permission of the OpenSSL Project.
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 *
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 * 6. Redistributions of any form whatsoever must retain the following
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 *    acknowledgment:
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 *    "This product includes software developed by the OpenSSL Project
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 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
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 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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 * OF THE POSSIBILITY OF SUCH DAMAGE.
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 * ====================================================================
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 *
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 * This product includes cryptographic software written by Eric Young
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 * (eay@cryptsoft.com).  This product includes software written by Tim
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 * Hudson (tjh@cryptsoft.com).
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 *
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 */
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/*
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This is an implementation of Triple DES Cipher Block Chaining with Output
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Feedback Masking, by Coppersmith, Johnson and Matyas, (IBM and Certicom).
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Note that there is a known attack on this by Biham and Knudsen but it takes
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a lot of work:
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http://www.cs.technion.ac.il/users/wwwb/cgi-bin/tr-get.cgi/1998/CS/CS0928.ps.gz
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*/
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#include <openssl/opensslconf.h> /* To see if OPENSSL_NO_DESCBCM is defined */
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#ifndef OPENSSL_NO_DESCBCM
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#include "des_locl.h"
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void DES_ede3_cbcm_encrypt(const unsigned char *in, unsigned char *out,
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	     long length, DES_key_schedule *ks1, DES_key_schedule *ks2,
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	     DES_key_schedule *ks3, DES_cblock *ivec1, DES_cblock *ivec2,
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	     int enc)
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    {
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    DES_LONG tin0,tin1;
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    DES_LONG tout0,tout1,xor0,xor1,m0,m1;
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3
    long l=length;
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    DES_LONG tin[2];
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    unsigned char *iv1,*iv2;
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    iv1 = &(*ivec1)[0];
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3
    iv2 = &(*ivec2)[0];
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    if (enc)
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	{
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2
	c2l(iv1,m0);
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2
	c2l(iv1,m1);
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2
	c2l(iv2,tout0);
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	c2l(iv2,tout1);
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	for (l-=8; l>=-7; l-=8)
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	    {
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	    tin[0]=m0;
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	    tin[1]=m1;
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	    DES_encrypt1(tin,ks3,1);
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	    m0=tin[0];
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	    m1=tin[1];
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	    if(l < 0)
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		{
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		c2ln(in,tin0,tin1,l+8);
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		}
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	    else
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		{
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		c2l(in,tin0);
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		c2l(in,tin1);
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		}
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	    tin0^=tout0;
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	    tin1^=tout1;
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	    tin[0]=tin0;
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	    tin[1]=tin1;
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	    DES_encrypt1(tin,ks1,1);
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	    tin[0]^=m0;
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	    tin[1]^=m1;
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	    DES_encrypt1(tin,ks2,0);
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	    tin[0]^=m0;
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	    tin[1]^=m1;
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	    DES_encrypt1(tin,ks1,1);
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	    tout0=tin[0];
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	    tout1=tin[1];
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	    l2c(tout0,out);
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	    l2c(tout1,out);
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	    }
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	iv1=&(*ivec1)[0];
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	l2c(m0,iv1);
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	l2c(m1,iv1);
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	iv2=&(*ivec2)[0];
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	l2c(tout0,iv2);
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	l2c(tout1,iv2);
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	}
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    else
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	{
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	DES_LONG t0,t1;
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	c2l(iv1,m0);
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1
	c2l(iv1,m1);
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1
	c2l(iv2,xor0);
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1
	c2l(iv2,xor1);
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	for (l-=8; l>=-7; l-=8)
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	    {
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	    tin[0]=m0;
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	    tin[1]=m1;
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	    DES_encrypt1(tin,ks3,1);
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	    m0=tin[0];
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	    m1=tin[1];
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	    c2l(in,tin0);
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	    c2l(in,tin1);
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	    t0=tin0;
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	    t1=tin1;
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	    tin[0]=tin0;
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	    tin[1]=tin1;
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	    DES_encrypt1(tin,ks1,0);
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	    tin[0]^=m0;
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	    tin[1]^=m1;
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	    DES_encrypt1(tin,ks2,1);
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	    tin[0]^=m0;
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	    tin[1]^=m1;
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	    DES_encrypt1(tin,ks1,0);
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	    tout0=tin[0];
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	    tout1=tin[1];
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	    tout0^=xor0;
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	    tout1^=xor1;
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	    if(l < 0)
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		{
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		l2cn(tout0,tout1,out,l+8);
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		}
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	    else
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		{
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		l2c(tout0,out);
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		l2c(tout1,out);
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		}
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	    xor0=t0;
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	    xor1=t1;
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	    }
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	iv1=&(*ivec1)[0];
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1
	l2c(m0,iv1);
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1
	l2c(m1,iv1);
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	iv2=&(*ivec2)[0];
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	l2c(xor0,iv2);
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1
	l2c(xor1,iv2);
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	}
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    tin0=tin1=tout0=tout1=xor0=xor1=0;
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    tin[0]=tin[1]=0;
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    }
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#endif