Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libcrypto/idea/i_skey.c	Lines:	52	53	98.1 %
Date:	2017-11-13	Branches:	13	16	81.3 %


/* $OpenBSD: i_skey.c,v 1.4 2014/10/28 07:35:58 jsg 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 <openssl/crypto.h>
#include <openssl/idea.h>
#include "idea_lcl.h"

static IDEA_INT inverse(unsigned int xin);
void idea_set_encrypt_key(const unsigned char *key, IDEA_KEY_SCHEDULE *ks)
	{
	int i;
	IDEA_INT *kt,*kf,r0,r1,r2;

	kt= &(ks->data[0][0]);
	n2s(key,kt[0]); n2s(key,kt[1]); n2s(key,kt[2]); n2s(key,kt[3]);
	n2s(key,kt[4]); n2s(key,kt[5]); n2s(key,kt[6]); n2s(key,kt[7]);

	kf=kt;
	kt+=8;
	for (i=0; i<6; i++)
		{
		r2= kf[1];
		r1= kf[2];
		*(kt++)= ((r2<<9) | (r1>>7))&0xffff;
		r0= kf[3];
		*(kt++)= ((r1<<9) | (r0>>7))&0xffff;
		r1= kf[4];
		*(kt++)= ((r0<<9) | (r1>>7))&0xffff;
		r0= kf[5];
		*(kt++)= ((r1<<9) | (r0>>7))&0xffff;
		r1= kf[6];
		*(kt++)= ((r0<<9) | (r1>>7))&0xffff;
		r0= kf[7];
		*(kt++)= ((r1<<9) | (r0>>7))&0xffff;
		r1= kf[0];
		if (i >= 5) break;
		*(kt++)= ((r0<<9) | (r1>>7))&0xffff;
		*(kt++)= ((r1<<9) | (r2>>7))&0xffff;
		kf+=8;
		}
	}

void idea_set_decrypt_key(IDEA_KEY_SCHEDULE *ek, IDEA_KEY_SCHEDULE *dk)
	{
	int r;
	IDEA_INT *fp,*tp,t;

	tp= &(dk->data[0][0]);
	fp= &(ek->data[8][0]);
	for (r=0; r<9; r++)
		{
		*(tp++)=inverse(fp[0]);
		*(tp++)=((int)(0x10000L-fp[2])&0xffff);
		*(tp++)=((int)(0x10000L-fp[1])&0xffff);
		*(tp++)=inverse(fp[3]);
		if (r == 8) break;
		fp-=6;
		*(tp++)=fp[4];
		*(tp++)=fp[5];
		}

	tp= &(dk->data[0][0]);
	t=tp[1];
	tp[1]=tp[2];
	tp[2]=t;

	t=tp[49];
	tp[49]=tp[50];
	tp[50]=t;
	}

/* taken directly from the 'paper' I'll have a look at it later */
static IDEA_INT inverse(unsigned int xin)
	{
	long n1,n2,q,r,b1,b2,t;

	if (xin == 0)
		b2=0;
	else
		{
		n1=0x10001;
		n2=xin;
		b2=1;
		b1=0;

		do	{
			r=(n1%n2);
			q=(n1-r)/n2;
			if (r == 0)
				{ if (b2 < 0) b2=0x10001+b2; }
			else
				{
				n1=n2;
				n2=r;
				t=b2;
				b2=b1-q*b2;
				b1=t;
				}
			} while (r != 0);
		}
	return((IDEA_INT)b2);
	}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: i_skey.c,v 1.4 2014/10/28 07:35:58 jsg Exp $ */
2			/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3			* All rights reserved.
4			*
5			* This package is an SSL implementation written
6			* by Eric Young (eay@cryptsoft.com).
7			* The implementation was written so as to conform with Netscapes SSL.
8			*
9			* This library is free for commercial and non-commercial use as long as
10			* the following conditions are aheared to. The following conditions
11			* apply to all code found in this distribution, be it the RC4, RSA,
12			* lhash, DES, etc., code; not just the SSL code. The SSL documentation
13			* included with this distribution is covered by the same copyright terms
14			* except that the holder is Tim Hudson (tjh@cryptsoft.com).
15			*
16			* Copyright remains Eric Young's, and as such any Copyright notices in
17			* the code are not to be removed.
18			* If this package is used in a product, Eric Young should be given attribution
19			* as the author of the parts of the library used.
20			* This can be in the form of a textual message at program startup or
21			* in documentation (online or textual) provided with the package.
22			*
23			* Redistribution and use in source and binary forms, with or without
24			* modification, are permitted provided that the following conditions
25			* are met:
26			* 1. Redistributions of source code must retain the copyright
27			* notice, this list of conditions and the following disclaimer.
28			* 2. Redistributions in binary form must reproduce the above copyright
29			* notice, this list of conditions and the following disclaimer in the
30			* documentation and/or other materials provided with the distribution.
31			* 3. All advertising materials mentioning features or use of this software
32			* must display the following acknowledgement:
33			* "This product includes cryptographic software written by
34			* Eric Young (eay@cryptsoft.com)"
35			* The word 'cryptographic' can be left out if the rouines from the library
36			* being used are not cryptographic related :-).
37			* 4. If you include any Windows specific code (or a derivative thereof) from
38			* the apps directory (application code) you must include an acknowledgement:
39			* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40			*
41			* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42			* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44			* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45			* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46			* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47			* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51			* SUCH DAMAGE.
52			*
53			* The licence and distribution terms for any publically available version or
54			* derivative of this code cannot be changed. i.e. this code cannot simply be
55			* copied and put under another distribution licence
56			* [including the GNU Public Licence.]
57			*/
58
59			#include <openssl/crypto.h>
60			#include <openssl/idea.h>
61			#include "idea_lcl.h"
62
63			static IDEA_INT inverse(unsigned int xin);
64			void idea_set_encrypt_key(const unsigned char key, IDEA_KEY_SCHEDULE ks)
65			{
66			int i;
67			IDEA_INT kt,kf,r0,r1,r2;
68
69		60	kt= &(ks->data[0][0]);
70		30	n2s(key,kt[0]); n2s(key,kt[1]); n2s(key,kt[2]); n2s(key,kt[3]);
71		30	n2s(key,kt[4]); n2s(key,kt[5]); n2s(key,kt[6]); n2s(key,kt[7]);
72
73			kf=kt;
74		30	kt+=8;
75	✓✗	360	for (i=0; i<6; i++)
76			{
77		180	r2= kf[1];
78		180	r1= kf[2];
79		180	*(kt++)= ((r2<<9) \| (r1>>7))&0xffff;
80		180	r0= kf[3];
81		180	*(kt++)= ((r1<<9) \| (r0>>7))&0xffff;
82		180	r1= kf[4];
83		180	*(kt++)= ((r0<<9) \| (r1>>7))&0xffff;
84		180	r0= kf[5];
85		180	*(kt++)= ((r1<<9) \| (r0>>7))&0xffff;
86		180	r1= kf[6];
87		180	*(kt++)= ((r0<<9) \| (r1>>7))&0xffff;
88		180	r0= kf[7];
89		180	*(kt++)= ((r1<<9) \| (r0>>7))&0xffff;
90		180	r1= kf[0];
91	✓✓	180	if (i >= 5) break;
92		150	*(kt++)= ((r0<<9) \| (r1>>7))&0xffff;
93		150	*(kt++)= ((r1<<9) \| (r2>>7))&0xffff;
94		150	kf+=8;
95			}
96		30	}
97
98			void idea_set_decrypt_key(IDEA_KEY_SCHEDULE ek, IDEA_KEY_SCHEDULE dk)
99			{
100			int r;
101			IDEA_INT fp,tp,t;
102
103		24	tp= &(dk->data[0][0]);
104		12	fp= &(ek->data[8][0]);
105	✓✗	216	for (r=0; r<9; r++)
106			{
107		108	*(tp++)=inverse(fp[0]);
108		108	*(tp++)=((int)(0x10000L-fp[2])&0xffff);
109		108	*(tp++)=((int)(0x10000L-fp[1])&0xffff);
110		108	*(tp++)=inverse(fp[3]);
111	✓✓	108	if (r == 8) break;
112		96	fp-=6;
113		96	*(tp++)=fp[4];
114		96	*(tp++)=fp[5];
115			}
116
117			tp= &(dk->data[0][0]);
118		12	t=tp[1];
119		12	tp[1]=tp[2];
120		12	tp[2]=t;
121
122		12	t=tp[49];
123		12	tp[49]=tp[50];
124		12	tp[50]=t;
125		12	}
126
127			/* taken directly from the 'paper' I'll have a look at it later */
128			static IDEA_INT inverse(unsigned int xin)
129			{
130			long n1,n2,q,r,b1,b2,t;
131
132	✗✓	432	if (xin == 0)
133			b2=0;
134			else
135			{
136			n1=0x10001;
137		216	n2=xin;
138			b2=1;
139			b1=0;
140
141		216	do {
142		1883	r=(n1%n2);
143		1883	q=(n1-r)/n2;
144	✓✓	1883	if (r == 0)
145	✓✓	339	{ if (b2 < 0) b2=0x10001+b2; }
146			else
147			{
148			n1=n2;
149			n2=r;
150			t=b2;
151		1667	b2=b1-q*b2;
152			b1=t;
153			}
154	✓✓	1883	} while (r != 0);
155			}
156		216	return((IDEA_INT)b2);
157			}