GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libcrypto/cast/c_enc.c Lines: 87 105 82.9 %
Date: 2017-11-13 Branches: 12 32 37.5 %

Line Branch Exec Source
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/* $OpenBSD: c_enc.c,v 1.7 2014/10/28 07:35:58 jsg Exp $ */
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/* Copyright (C) 1995-1998 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 <openssl/cast.h>
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#include "cast_lcl.h"
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#ifndef OPENBSD_CAST_ASM
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void CAST_encrypt(CAST_LONG *data, const CAST_KEY *key)
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	{
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	CAST_LONG l,r,t;
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	const CAST_LONG *k;
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24006298
	k= &(key->data[0]);
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12003149
	l=data[0];
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12003149
	r=data[1];
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12003149
	E_CAST( 0,k,l,r,+,^,-);
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12003149
	E_CAST( 1,k,r,l,^,-,+);
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12003149
	E_CAST( 2,k,l,r,-,+,^);
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12003149
	E_CAST( 3,k,r,l,+,^,-);
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12003149
	E_CAST( 4,k,l,r,^,-,+);
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12003149
	E_CAST( 5,k,r,l,-,+,^);
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12003149
	E_CAST( 6,k,l,r,+,^,-);
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12003149
	E_CAST( 7,k,r,l,^,-,+);
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12003149
	E_CAST( 8,k,l,r,-,+,^);
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12003149
	E_CAST( 9,k,r,l,+,^,-);
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12003149
	E_CAST(10,k,l,r,^,-,+);
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12003149
	E_CAST(11,k,r,l,-,+,^);
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12003149
	if(!key->short_key)
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	    {
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12003143
	    E_CAST(12,k,l,r,+,^,-);
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12003143
	    E_CAST(13,k,r,l,^,-,+);
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12003143
	    E_CAST(14,k,l,r,-,+,^);
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12003143
	    E_CAST(15,k,r,l,+,^,-);
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12003143
	    }
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12003149
	data[1]=l&0xffffffffL;
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12003149
	data[0]=r&0xffffffffL;
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12003149
	}
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void CAST_decrypt(CAST_LONG *data, const CAST_KEY *key)
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	{
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	CAST_LONG l,r,t;
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	const CAST_LONG *k;
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2794
	k= &(key->data[0]);
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1397
	l=data[0];
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1397
	r=data[1];
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1397
	if(!key->short_key)
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	    {
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1391
	    E_CAST(15,k,l,r,+,^,-);
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1391
	    E_CAST(14,k,r,l,-,+,^);
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1391
	    E_CAST(13,k,l,r,^,-,+);
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1391
	    E_CAST(12,k,r,l,+,^,-);
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1391
	    }
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1397
	E_CAST(11,k,l,r,-,+,^);
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1397
	E_CAST(10,k,r,l,^,-,+);
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1397
	E_CAST( 9,k,l,r,+,^,-);
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1397
	E_CAST( 8,k,r,l,-,+,^);
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1397
	E_CAST( 7,k,l,r,^,-,+);
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1397
	E_CAST( 6,k,r,l,+,^,-);
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1397
	E_CAST( 5,k,l,r,-,+,^);
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1397
	E_CAST( 4,k,r,l,^,-,+);
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1397
	E_CAST( 3,k,l,r,+,^,-);
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1397
	E_CAST( 2,k,r,l,-,+,^);
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1397
	E_CAST( 1,k,l,r,^,-,+);
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1397
	E_CAST( 0,k,r,l,+,^,-);
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1397
	data[1]=l&0xffffffffL;
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1397
	data[0]=r&0xffffffffL;
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1397
	}
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#endif
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void CAST_cbc_encrypt(const unsigned char *in, unsigned char *out, long length,
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	     const CAST_KEY *ks, unsigned char *iv, int enc)
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	{
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	CAST_LONG tin0,tin1;
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	CAST_LONG tout0,tout1,xor0,xor1;
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	long l=length;
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476
	CAST_LONG tin[2];
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	if (enc)
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		{
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		n2l(iv,tout0);
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		n2l(iv,tout1);
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		iv-=8;
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2184
		for (l-=8; l>=0; l-=8)
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			{
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950
			n2l(in,tin0);
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950
			n2l(in,tin1);
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950
			tin0^=tout0;
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950
			tin1^=tout1;
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950
			tin[0]=tin0;
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950
			tin[1]=tin1;
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950
			CAST_encrypt(tin,ks);
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950
			tout0=tin[0];
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950
			tout1=tin[1];
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950
			l2n(tout0,out);
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950
			l2n(tout1,out);
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			}
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		if (l != -8)
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			{
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			n2ln(in,tin0,tin1,l+8);
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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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			CAST_encrypt(tin,ks);
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			tout0=tin[0];
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			tout1=tin[1];
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			l2n(tout0,out);
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			l2n(tout1,out);
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			}
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		l2n(tout0,iv);
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		l2n(tout1,iv);
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		}
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	else
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		{
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		n2l(iv,xor0);
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		n2l(iv,xor1);
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		iv-=8;
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2092
		for (l-=8; l>=0; l-=8)
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			{
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950
			n2l(in,tin0);
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950
			n2l(in,tin1);
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950
			tin[0]=tin0;
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950
			tin[1]=tin1;
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950
			CAST_decrypt(tin,ks);
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950
			tout0=tin[0]^xor0;
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950
			tout1=tin[1]^xor1;
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950
			l2n(tout0,out);
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950
			l2n(tout1,out);
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			xor0=tin0;
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			xor1=tin1;
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			}
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		if (l != -8)
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			{
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			n2l(in,tin0);
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			n2l(in,tin1);
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			tin[0]=tin0;
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			tin[1]=tin1;
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			CAST_decrypt(tin,ks);
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			tout0=tin[0]^xor0;
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			tout1=tin[1]^xor1;
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			l2nn(tout0,tout1,out,l+8);
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			xor0=tin0;
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			xor1=tin1;
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			}
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		l2n(xor0,iv);
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		l2n(xor1,iv);
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		}
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	tin0=tin1=tout0=tout1=xor0=xor1=0;
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238
	tin[0]=tin[1]=0;
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238
	}