[apple/xnu.git] / bsd / crypto / des / des_enc.c

/*	$KAME: kame/kame/sys/crypto/des/des_enc.c,v 1.1 2001/09/10 04:03:58 itojun Exp $	*/
/*	$FreeBSD: src/sys/crypto/des/des_enc.c,v 1.1.2.1 2002/03/26 10:12:24 ume Exp $	*/

/* crypto/des/des_enc.c */
/* 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 <sys/types.h>
#include <crypto/des/des_locl.h>

extern	const DES_LONG des_SPtrans[8][64];

void des_encrypt1(DES_LONG *data, des_key_schedule ks, int enc)
{
	register DES_LONG l,r,t,u;
#ifdef DES_PTR
	register const unsigned char *des_SP=(const unsigned char *)des_SPtrans;
#endif
#ifndef DES_UNROLL
	register int i;
#endif
	register DES_LONG *s;

	r=data[0];
	l=data[1];

	IP(r,l);
	/* Things have been modified so that the initial rotate is
	 * done outside the loop.  This required the
	 * des_SPtrans values in sp.h to be rotated 1 bit to the right.
	 * One perl script later and things have a 5% speed up on a sparc2.
	 * Thanks to Richard Outerbridge <71755.204@CompuServe.COM>
	 * for pointing this out. */
	/* clear the top bits on machines with 8byte longs */
	/* shift left by 2 */
	r=ROTATE(r,29)&0xffffffffL;
	l=ROTATE(l,29)&0xffffffffL;

	s=ks->ks.deslong;
	/* I don't know if it is worth the effort of loop unrolling the
	 * inner loop */
	if (enc)
		{
#ifdef DES_UNROLL
		D_ENCRYPT(l,r, 0); /*  1 */
		D_ENCRYPT(r,l, 2); /*  2 */
		D_ENCRYPT(l,r, 4); /*  3 */
		D_ENCRYPT(r,l, 6); /*  4 */
		D_ENCRYPT(l,r, 8); /*  5 */
		D_ENCRYPT(r,l,10); /*  6 */
		D_ENCRYPT(l,r,12); /*  7 */
		D_ENCRYPT(r,l,14); /*  8 */
		D_ENCRYPT(l,r,16); /*  9 */
		D_ENCRYPT(r,l,18); /*  10 */
		D_ENCRYPT(l,r,20); /*  11 */
		D_ENCRYPT(r,l,22); /*  12 */
		D_ENCRYPT(l,r,24); /*  13 */
		D_ENCRYPT(r,l,26); /*  14 */
		D_ENCRYPT(l,r,28); /*  15 */
		D_ENCRYPT(r,l,30); /*  16 */
#else
		for (i=0; i<32; i+=8)
			{
			D_ENCRYPT(l,r,i+0); /*  1 */
			D_ENCRYPT(r,l,i+2); /*  2 */
			D_ENCRYPT(l,r,i+4); /*  3 */
			D_ENCRYPT(r,l,i+6); /*  4 */
			}
#endif
		}
	else
		{
#ifdef DES_UNROLL
		D_ENCRYPT(l,r,30); /* 16 */
		D_ENCRYPT(r,l,28); /* 15 */
		D_ENCRYPT(l,r,26); /* 14 */
		D_ENCRYPT(r,l,24); /* 13 */
		D_ENCRYPT(l,r,22); /* 12 */
		D_ENCRYPT(r,l,20); /* 11 */
		D_ENCRYPT(l,r,18); /* 10 */
		D_ENCRYPT(r,l,16); /*  9 */
		D_ENCRYPT(l,r,14); /*  8 */
		D_ENCRYPT(r,l,12); /*  7 */
		D_ENCRYPT(l,r,10); /*  6 */
		D_ENCRYPT(r,l, 8); /*  5 */
		D_ENCRYPT(l,r, 6); /*  4 */
		D_ENCRYPT(r,l, 4); /*  3 */
		D_ENCRYPT(l,r, 2); /*  2 */
		D_ENCRYPT(r,l, 0); /*  1 */
#else
		for (i=30; i>0; i-=8)
			{
			D_ENCRYPT(l,r,i-0); /* 16 */
			D_ENCRYPT(r,l,i-2); /* 15 */
			D_ENCRYPT(l,r,i-4); /* 14 */
			D_ENCRYPT(r,l,i-6); /* 13 */
			}
#endif
		}

	/* rotate and clear the top bits on machines with 8byte longs */
	l=ROTATE(l,3)&0xffffffffL;
	r=ROTATE(r,3)&0xffffffffL;

	FP(r,l);
	data[0]=l;
	data[1]=r;
	l=r=t=u=0;
}

void des_encrypt2(DES_LONG *data, des_key_schedule ks, int enc)
{
	register DES_LONG l,r,t,u;
#ifdef DES_PTR
	register const unsigned char *des_SP=(const unsigned char *)des_SPtrans;
#endif
#ifndef DES_UNROLL
	register int i;
#endif
	register DES_LONG *s;

	r=data[0];
	l=data[1];

	/* Things have been modified so that the initial rotate is
	 * done outside the loop.  This required the
	 * des_SPtrans values in sp.h to be rotated 1 bit to the right.
	 * One perl script later and things have a 5% speed up on a sparc2.
	 * Thanks to Richard Outerbridge <71755.204@CompuServe.COM>
	 * for pointing this out. */
	/* clear the top bits on machines with 8byte longs */
	r=ROTATE(r,29)&0xffffffffL;
	l=ROTATE(l,29)&0xffffffffL;

	s=ks->ks.deslong;
	/* I don't know if it is worth the effort of loop unrolling the
	 * inner loop */
	if (enc)
		{
#ifdef DES_UNROLL
		D_ENCRYPT(l,r, 0); /*  1 */
		D_ENCRYPT(r,l, 2); /*  2 */
		D_ENCRYPT(l,r, 4); /*  3 */
		D_ENCRYPT(r,l, 6); /*  4 */
		D_ENCRYPT(l,r, 8); /*  5 */
		D_ENCRYPT(r,l,10); /*  6 */
		D_ENCRYPT(l,r,12); /*  7 */
		D_ENCRYPT(r,l,14); /*  8 */
		D_ENCRYPT(l,r,16); /*  9 */
		D_ENCRYPT(r,l,18); /*  10 */
		D_ENCRYPT(l,r,20); /*  11 */
		D_ENCRYPT(r,l,22); /*  12 */
		D_ENCRYPT(l,r,24); /*  13 */
		D_ENCRYPT(r,l,26); /*  14 */
		D_ENCRYPT(l,r,28); /*  15 */
		D_ENCRYPT(r,l,30); /*  16 */
#else
		for (i=0; i<32; i+=8)
			{
			D_ENCRYPT(l,r,i+0); /*  1 */
			D_ENCRYPT(r,l,i+2); /*  2 */
			D_ENCRYPT(l,r,i+4); /*  3 */
			D_ENCRYPT(r,l,i+6); /*  4 */
			}
#endif
		}
	else
		{
#ifdef DES_UNROLL
		D_ENCRYPT(l,r,30); /* 16 */
		D_ENCRYPT(r,l,28); /* 15 */
		D_ENCRYPT(l,r,26); /* 14 */
		D_ENCRYPT(r,l,24); /* 13 */
		D_ENCRYPT(l,r,22); /* 12 */
		D_ENCRYPT(r,l,20); /* 11 */
		D_ENCRYPT(l,r,18); /* 10 */
		D_ENCRYPT(r,l,16); /*  9 */
		D_ENCRYPT(l,r,14); /*  8 */
		D_ENCRYPT(r,l,12); /*  7 */
		D_ENCRYPT(l,r,10); /*  6 */
		D_ENCRYPT(r,l, 8); /*  5 */
		D_ENCRYPT(l,r, 6); /*  4 */
		D_ENCRYPT(r,l, 4); /*  3 */
		D_ENCRYPT(l,r, 2); /*  2 */
		D_ENCRYPT(r,l, 0); /*  1 */
#else
		for (i=30; i>0; i-=8)
			{
			D_ENCRYPT(l,r,i-0); /* 16 */
			D_ENCRYPT(r,l,i-2); /* 15 */
			D_ENCRYPT(l,r,i-4); /* 14 */
			D_ENCRYPT(r,l,i-6); /* 13 */
			}
#endif
		}
	/* rotate and clear the top bits on machines with 8byte longs */
	data[0]=ROTATE(l,3)&0xffffffffL;
	data[1]=ROTATE(r,3)&0xffffffffL;
	l=r=t=u=0;
}

void des_encrypt3(DES_LONG *data, des_key_schedule ks1, des_key_schedule ks2,
	     des_key_schedule ks3)
{
	register DES_LONG l,r;

	l=data[0];
	r=data[1];
	IP(l,r);
	data[0]=l;
	data[1]=r;
	des_encrypt2((DES_LONG *)data,ks1,DES_ENCRYPT);
	des_encrypt2((DES_LONG *)data,ks2,DES_DECRYPT);
	des_encrypt2((DES_LONG *)data,ks3,DES_ENCRYPT);
	l=data[0];
	r=data[1];
	FP(r,l);
	data[0]=l;
	data[1]=r;
}

void des_decrypt3(DES_LONG *data, des_key_schedule ks1, des_key_schedule ks2,
	     des_key_schedule ks3)
{
	register DES_LONG l,r;

	l=data[0];
	r=data[1];
	IP(l,r);
	data[0]=l;
	data[1]=r;
	des_encrypt2((DES_LONG *)data,ks3,DES_DECRYPT);
	des_encrypt2((DES_LONG *)data,ks2,DES_ENCRYPT);
	des_encrypt2((DES_LONG *)data,ks1,DES_DECRYPT);
	l=data[0];
	r=data[1];
	FP(r,l);
	data[0]=l;
	data[1]=r;
}
Commit	Line	Data
55e303ae A	1	/* $KAME: kame/kame/sys/crypto/des/des_enc.c,v 1.1 2001/09/10 04:03:58 itojun Exp $ */
	2	/* $FreeBSD: src/sys/crypto/des/des_enc.c,v 1.1.2.1 2002/03/26 10:12:24 ume Exp $ */
	3
	4	/* crypto/des/des_enc.c */
	5	/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
	6	* All rights reserved.
	7	*
	8	* This package is an SSL implementation written
	9	* by Eric Young (eay@cryptsoft.com).
	10	* The implementation was written so as to conform with Netscapes SSL.
	11	*
	12	* This library is free for commercial and non-commercial use as long as
	13	* the following conditions are aheared to. The following conditions
	14	* apply to all code found in this distribution, be it the RC4, RSA,
	15	* lhash, DES, etc., code; not just the SSL code. The SSL documentation
	16	* included with this distribution is covered by the same copyright terms
	17	* except that the holder is Tim Hudson (tjh@cryptsoft.com).
	18	*
	19	* Copyright remains Eric Young's, and as such any Copyright notices in
	20	* the code are not to be removed.
	21	* If this package is used in a product, Eric Young should be given attribution
	22	* as the author of the parts of the library used.
	23	* This can be in the form of a textual message at program startup or
	24	* in documentation (online or textual) provided with the package.
	25	*
	26	* Redistribution and use in source and binary forms, with or without
	27	* modification, are permitted provided that the following conditions
	28	* are met:
	29	* 1. Redistributions of source code must retain the copyright
	30	* notice, this list of conditions and the following disclaimer.
	31	* 2. Redistributions in binary form must reproduce the above copyright
	32	* notice, this list of conditions and the following disclaimer in the
	33	* documentation and/or other materials provided with the distribution.
	34	* 3. All advertising materials mentioning features or use of this software
	35	* must display the following acknowledgement:
	36	* "This product includes cryptographic software written by
	37	* Eric Young (eay@cryptsoft.com)"
	38	* The word 'cryptographic' can be left out if the rouines from the library
	39	* being used are not cryptographic related :-).
	40	* 4. If you include any Windows specific code (or a derivative thereof) from
	41	* the apps directory (application code) you must include an acknowledgement:
	42	* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
	43	*
	44	* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
	45	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	46	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	47	* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
	48	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	49	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	50	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	51	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	52	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	53	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	54	* SUCH DAMAGE.
	55	*
	56	* The licence and distribution terms for any publically available version or
	57	* derivative of this code cannot be changed. i.e. this code cannot simply be
	58	* copied and put under another distribution licence
	59	* [including the GNU Public Licence.]
	60	*/
	61
	62	#include <sys/types.h>
	63	#include <crypto/des/des_locl.h>
	64
65	extern const DES_LONG des_SPtrans[8][64];
66
67	void des_encrypt1(DES_LONG *data, des_key_schedule ks, int enc)
68	{
69	register DES_LONG l,r,t,u;
70	#ifdef DES_PTR
71	register const unsigned char des_SP=(const unsigned char )des_SPtrans;
72	#endif
73	#ifndef DES_UNROLL
74	register int i;
75	#endif
76	register DES_LONG *s;
77
78	r=data[0];
79	l=data[1];
80
81	IP(r,l);
82	/* Things have been modified so that the initial rotate is
83	* done outside the loop. This required the
84	* des_SPtrans values in sp.h to be rotated 1 bit to the right.
85	* One perl script later and things have a 5% speed up on a sparc2.
86	* Thanks to Richard Outerbridge <71755.204@CompuServe.COM>
87	* for pointing this out. */
88	/* clear the top bits on machines with 8byte longs */
89	/* shift left by 2 */
90	r=ROTATE(r,29)&0xffffffffL;
91	l=ROTATE(l,29)&0xffffffffL;
92
93	s=ks->ks.deslong;
94	/* I don't know if it is worth the effort of loop unrolling the
95	* inner loop */
96	if (enc)
97	{
98	#ifdef DES_UNROLL
99	D_ENCRYPT(l,r, 0); /* 1 */
100	D_ENCRYPT(r,l, 2); /* 2 */
101	D_ENCRYPT(l,r, 4); /* 3 */
102	D_ENCRYPT(r,l, 6); /* 4 */
103	D_ENCRYPT(l,r, 8); /* 5 */
104	D_ENCRYPT(r,l,10); /* 6 */
105	D_ENCRYPT(l,r,12); /* 7 */
106	D_ENCRYPT(r,l,14); /* 8 */
107	D_ENCRYPT(l,r,16); /* 9 */
108	D_ENCRYPT(r,l,18); /* 10 */
109	D_ENCRYPT(l,r,20); /* 11 */
110	D_ENCRYPT(r,l,22); /* 12 */
111	D_ENCRYPT(l,r,24); /* 13 */
112	D_ENCRYPT(r,l,26); /* 14 */
113	D_ENCRYPT(l,r,28); /* 15 */
114	D_ENCRYPT(r,l,30); /* 16 */
115	#else
116	for (i=0; i<32; i+=8)
117	{
118	D_ENCRYPT(l,r,i+0); /* 1 */
119	D_ENCRYPT(r,l,i+2); /* 2 */
120	D_ENCRYPT(l,r,i+4); /* 3 */
121	D_ENCRYPT(r,l,i+6); /* 4 */
122	}
123	#endif
124	}
125	else
126	{
127	#ifdef DES_UNROLL
128	D_ENCRYPT(l,r,30); /* 16 */
129	D_ENCRYPT(r,l,28); /* 15 */
130	D_ENCRYPT(l,r,26); /* 14 */
131	D_ENCRYPT(r,l,24); /* 13 */
132	D_ENCRYPT(l,r,22); /* 12 */
133	D_ENCRYPT(r,l,20); /* 11 */
134	D_ENCRYPT(l,r,18); /* 10 */
135	D_ENCRYPT(r,l,16); /* 9 */
136	D_ENCRYPT(l,r,14); /* 8 */
137	D_ENCRYPT(r,l,12); /* 7 */
138	D_ENCRYPT(l,r,10); /* 6 */
139	D_ENCRYPT(r,l, 8); /* 5 */
140	D_ENCRYPT(l,r, 6); /* 4 */
141	D_ENCRYPT(r,l, 4); /* 3 */
142	D_ENCRYPT(l,r, 2); /* 2 */
143	D_ENCRYPT(r,l, 0); /* 1 */
144	#else
145	for (i=30; i>0; i-=8)
146	{
147	D_ENCRYPT(l,r,i-0); /* 16 */
148	D_ENCRYPT(r,l,i-2); /* 15 */
149	D_ENCRYPT(l,r,i-4); /* 14 */
150	D_ENCRYPT(r,l,i-6); /* 13 */
151	}
152	#endif
153	}
154
155	/* rotate and clear the top bits on machines with 8byte longs */
156	l=ROTATE(l,3)&0xffffffffL;
157	r=ROTATE(r,3)&0xffffffffL;
158
159	FP(r,l);
160	data[0]=l;
161	data[1]=r;
162	l=r=t=u=0;
163	}
164
165	void des_encrypt2(DES_LONG *data, des_key_schedule ks, int enc)
166	{
167	register DES_LONG l,r,t,u;
168	#ifdef DES_PTR
169	register const unsigned char des_SP=(const unsigned char )des_SPtrans;
170	#endif
171	#ifndef DES_UNROLL
172	register int i;
173	#endif
174	register DES_LONG *s;
175
176	r=data[0];
177	l=data[1];
178
179	/* Things have been modified so that the initial rotate is
180	* done outside the loop. This required the
181	* des_SPtrans values in sp.h to be rotated 1 bit to the right.
182	* One perl script later and things have a 5% speed up on a sparc2.
183	* Thanks to Richard Outerbridge <71755.204@CompuServe.COM>
184	* for pointing this out. */
185	/* clear the top bits on machines with 8byte longs */
186	r=ROTATE(r,29)&0xffffffffL;
187	l=ROTATE(l,29)&0xffffffffL;
188
189	s=ks->ks.deslong;
190	/* I don't know if it is worth the effort of loop unrolling the
191	* inner loop */
192	if (enc)
193	{
194	#ifdef DES_UNROLL
195	D_ENCRYPT(l,r, 0); /* 1 */
196	D_ENCRYPT(r,l, 2); /* 2 */
197	D_ENCRYPT(l,r, 4); /* 3 */
198	D_ENCRYPT(r,l, 6); /* 4 */
199	D_ENCRYPT(l,r, 8); /* 5 */
200	D_ENCRYPT(r,l,10); /* 6 */
201	D_ENCRYPT(l,r,12); /* 7 */
202	D_ENCRYPT(r,l,14); /* 8 */
203	D_ENCRYPT(l,r,16); /* 9 */
204	D_ENCRYPT(r,l,18); /* 10 */
205	D_ENCRYPT(l,r,20); /* 11 */
206	D_ENCRYPT(r,l,22); /* 12 */
207	D_ENCRYPT(l,r,24); /* 13 */
208	D_ENCRYPT(r,l,26); /* 14 */
209	D_ENCRYPT(l,r,28); /* 15 */
210	D_ENCRYPT(r,l,30); /* 16 */
211	#else
212	for (i=0; i<32; i+=8)
213	{
214	D_ENCRYPT(l,r,i+0); /* 1 */
215	D_ENCRYPT(r,l,i+2); /* 2 */
216	D_ENCRYPT(l,r,i+4); /* 3 */
217	D_ENCRYPT(r,l,i+6); /* 4 */
218	}
219	#endif
220	}
221	else
222	{
223	#ifdef DES_UNROLL
224	D_ENCRYPT(l,r,30); /* 16 */
225	D_ENCRYPT(r,l,28); /* 15 */
226	D_ENCRYPT(l,r,26); /* 14 */
227	D_ENCRYPT(r,l,24); /* 13 */
228	D_ENCRYPT(l,r,22); /* 12 */
229	D_ENCRYPT(r,l,20); /* 11 */
230	D_ENCRYPT(l,r,18); /* 10 */
231	D_ENCRYPT(r,l,16); /* 9 */
232	D_ENCRYPT(l,r,14); /* 8 */
233	D_ENCRYPT(r,l,12); /* 7 */
234	D_ENCRYPT(l,r,10); /* 6 */
235	D_ENCRYPT(r,l, 8); /* 5 */
236	D_ENCRYPT(l,r, 6); /* 4 */
237	D_ENCRYPT(r,l, 4); /* 3 */
238	D_ENCRYPT(l,r, 2); /* 2 */
239	D_ENCRYPT(r,l, 0); /* 1 */
240	#else
241	for (i=30; i>0; i-=8)
242	{
243	D_ENCRYPT(l,r,i-0); /* 16 */
244	D_ENCRYPT(r,l,i-2); /* 15 */
245	D_ENCRYPT(l,r,i-4); /* 14 */
246	D_ENCRYPT(r,l,i-6); /* 13 */
247	}
248	#endif
249	}
250	/* rotate and clear the top bits on machines with 8byte longs */
251	data[0]=ROTATE(l,3)&0xffffffffL;
252	data[1]=ROTATE(r,3)&0xffffffffL;
253	l=r=t=u=0;
254	}
255
256	void des_encrypt3(DES_LONG *data, des_key_schedule ks1, des_key_schedule ks2,
257	des_key_schedule ks3)
258	{
259	register DES_LONG l,r;
260
261	l=data[0];
262	r=data[1];
263	IP(l,r);
264	data[0]=l;
265	data[1]=r;
266	des_encrypt2((DES_LONG *)data,ks1,DES_ENCRYPT);
267	des_encrypt2((DES_LONG *)data,ks2,DES_DECRYPT);
268	des_encrypt2((DES_LONG *)data,ks3,DES_ENCRYPT);
269	l=data[0];
270	r=data[1];
271	FP(r,l);
272	data[0]=l;
273	data[1]=r;
274	}
275
276	void des_decrypt3(DES_LONG *data, des_key_schedule ks1, des_key_schedule ks2,
277	des_key_schedule ks3)
278	{
279	register DES_LONG l,r;
280
281	l=data[0];
282	r=data[1];
283	IP(l,r);
284	data[0]=l;
285	data[1]=r;
286	des_encrypt2((DES_LONG *)data,ks3,DES_DECRYPT);
287	des_encrypt2((DES_LONG *)data,ks2,DES_ENCRYPT);
288	des_encrypt2((DES_LONG *)data,ks1,DES_DECRYPT);
289	l=data[0];
290	r=data[1];
291	FP(r,l);
292	data[0]=l;
293	data[1]=r;
294	}