GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libcrypto/crypto/../../libssl/src/crypto/idea/i_cbc.c Lines: 77 77 100.0 %
Date: 2016-12-06 Branches: 49 96 51.0 %

Line Branch Exec Source
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/* $OpenBSD: i_cbc.c,v 1.3 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/idea.h>
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#include "idea_lcl.h"
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void idea_cbc_encrypt(const unsigned char *in, unsigned char *out, long length,
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	     IDEA_KEY_SCHEDULE *ks, unsigned char *iv, int encrypt)
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3
	{
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	unsigned long tin0,tin1;
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	unsigned long tout0,tout1,xor0,xor1;
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3
	long l=length;
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	unsigned long tin[2];
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3
	if (encrypt)
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		{
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1
		n2l(iv,tout0);
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1
		n2l(iv,tout1);
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1
		iv-=8;
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4
		for (l-=8; l>=0; l-=8)
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			{
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3
			n2l(in,tin0);
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3
			n2l(in,tin1);
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3
			tin0^=tout0;
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3
			tin1^=tout1;
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3
			tin[0]=tin0;
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3
			tin[1]=tin1;
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			idea_encrypt(tin,ks);
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			tout0=tin[0]; l2n(tout0,out);
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			tout1=tin[1]; l2n(tout1,out);
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			}
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1
		if (l != -8)
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			{
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			n2ln(in,tin0,tin1,l+8);
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1
			tin0^=tout0;
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1
			tin1^=tout1;
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1
			tin[0]=tin0;
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1
			tin[1]=tin1;
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1
			idea_encrypt(tin,ks);
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1
			tout0=tin[0]; l2n(tout0,out);
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1
			tout1=tin[1]; l2n(tout1,out);
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			}
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1
		l2n(tout0,iv);
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1
		l2n(tout1,iv);
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		}
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	else
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		{
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2
		n2l(iv,xor0);
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2
		n2l(iv,xor1);
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2
		iv-=8;
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5
		for (l-=8; l>=0; l-=8)
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			{
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3
			n2l(in,tin0); tin[0]=tin0;
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3
			n2l(in,tin1); tin[1]=tin1;
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3
			idea_encrypt(tin,ks);
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3
			tout0=tin[0]^xor0;
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3
			tout1=tin[1]^xor1;
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3
			l2n(tout0,out);
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3
			l2n(tout1,out);
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3
			xor0=tin0;
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3
			xor1=tin1;
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			}
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2
		if (l != -8)
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			{
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1
			n2l(in,tin0); tin[0]=tin0;
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1
			n2l(in,tin1); tin[1]=tin1;
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1
			idea_encrypt(tin,ks);
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1
			tout0=tin[0]^xor0;
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1
			tout1=tin[1]^xor1;
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1
			l2nn(tout0,tout1,out,l+8);
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1
			xor0=tin0;
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1
			xor1=tin1;
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			}
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2
		l2n(xor0,iv);
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2
		l2n(xor1,iv);
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		}
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	tin0=tin1=tout0=tout1=xor0=xor1=0;
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3
	tin[0]=tin[1]=0;
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3
	}
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void idea_encrypt(unsigned long *d, IDEA_KEY_SCHEDULE *key)
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	{
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	IDEA_INT *p;
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	unsigned long x1,x2,x3,x4,t0,t1,ul;
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	x2=d[0];
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	x1=(x2>>16);
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	x4=d[1];
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	x3=(x4>>16);
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	p= &(key->data[0][0]);
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	E_IDEA(0);
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	E_IDEA(1);
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	E_IDEA(2);
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	E_IDEA(3);
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	E_IDEA(4);
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	E_IDEA(5);
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	E_IDEA(6);
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	E_IDEA(7);
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	x1&=0xffff;
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	idea_mul(x1,x1,*p,ul); p++;
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	t0= x3+ *(p++);
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	t1= x2+ *(p++);
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	x4&=0xffff;
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	idea_mul(x4,x4,*p,ul);
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	d[0]=(t0&0xffff)|((x1&0xffff)<<16);
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	d[1]=(x4&0xffff)|((t1&0xffff)<<16);
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	}