[apple/xnu.git] / bsd / crypto / blowfish / bf_skey.c

/*	$FreeBSD: src/sys/crypto/blowfish/bf_skey.c,v 1.1.2.2 2001/07/03 11:01:28 ume Exp $	*/
/*	$KAME: bf_skey.c,v 1.5 2000/11/06 13:58:08 itojun Exp $	*/

/* crypto/bf/bf_skey.c */
/* Copyright (C) 1995-1997 Eric Young (eay@mincom.oz.au)
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young (eay@mincom.oz.au).
 * 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@mincom.oz.au).
 *
 * 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@mincom.oz.au)"
 *    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@mincom.oz.au)"
 *
 * 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 <sys/time.h>
#include <sys/systm.h>
#include <crypto/blowfish/blowfish.h>
#include <crypto/blowfish/bf_locl.h>
#include <crypto/blowfish/bf_pi.h>

void
BF_set_key(key, len, data)
	BF_KEY *key;
	int len;
	unsigned char *data;
{
	int i;
	BF_LONG *p, ri, in[2];
	unsigned char *d, *end;

	memcpy((char *)key, (char *)&bf_init, sizeof(BF_KEY));
	p = key->P;

	if (len > ((BF_ROUNDS + 2) * 4))
		len = (BF_ROUNDS + 2) * 4;

	d = data;
	end= &(data[len]);
	for (i = 0; i < BF_ROUNDS + 2; i++) {
		ri = *(d++);
		if (d >= end) d = data;

		ri <<= 8;
		ri |= *(d++);
		if (d >= end) d = data;

		ri <<= 8;
		ri |= *(d++);
		if (d >= end) d = data;

		ri <<= 8;
		ri |= *(d++);
		if (d >= end) d = data;

		p[i] ^= ri;
	}

	in[0] = 0L;
	in[1] = 0L;
	for (i = 0; i < BF_ROUNDS + 2; i += 2) {
		BF_encrypt(in, key, BF_ENCRYPT);
		p[i  ] = in[0];
		p[i+1] = in[1];
	}

	p = key->S;
	for (i = 0; i < 4 * 256; i += 2) {
		BF_encrypt(in, key, BF_ENCRYPT);
		p[i  ] = in[0];
		p[i+1] = in[1];
	}
}
Commit	Line	Data
9bccf70c A	1	/* $FreeBSD: src/sys/crypto/blowfish/bf_skey.c,v 1.1.2.2 2001/07/03 11:01:28 ume Exp $ */
	2	/* $KAME: bf_skey.c,v 1.5 2000/11/06 13:58:08 itojun Exp $ */
	3
1c79356b A	4	/* crypto/bf/bf_skey.c */
	5	/* Copyright (C) 1995-1997 Eric Young (eay@mincom.oz.au)
	6	* All rights reserved.
	7	*
	8	* This package is an SSL implementation written
	9	* by Eric Young (eay@mincom.oz.au).
	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@mincom.oz.au).
	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@mincom.oz.au)"
	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@mincom.oz.au)"
	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 <sys/time.h>
	64	#include <sys/systm.h>
	65	#include <crypto/blowfish/blowfish.h>
	66	#include <crypto/blowfish/bf_locl.h>
	67	#include <crypto/blowfish/bf_pi.h>
68
9bccf70c A	69	void
	70	BF_set_key(key, len, data)
	71	BF_KEY *key;
	72	int len;
	73	unsigned char *data;
	74	{
1c79356b	75	int i;
9bccf70c A	76	BF_LONG *p, ri, in[2];
9bccf70c A	77	unsigned char d, end;
1c79356b	78
9bccf70c A	79	memcpy((char )key, (char )&bf_init, sizeof(BF_KEY));
9bccf70c A	80	p = key->P;
1c79356b	81
9bccf70c A	82	if (len > ((BF_ROUNDS + 2) * 4))
9bccf70c A	83	len = (BF_ROUNDS + 2) * 4;
1c79356b	84
9bccf70c	85	d = data;
1c79356b	86	end= &(data[len]);
9bccf70c A	87	for (i = 0; i < BF_ROUNDS + 2; i++) {
	88	ri = *(d++);
	89	if (d >= end) d = data;
1c79356b	90
9bccf70c A	91	ri <<= 8;
	92	ri \|= *(d++);
	93	if (d >= end) d = data;
1c79356b	94
9bccf70c A	95	ri <<= 8;
	96	ri \|= *(d++);
	97	if (d >= end) d = data;
1c79356b	98
9bccf70c A	99	ri <<= 8;
	100	ri \|= *(d++);
	101	if (d >= end) d = data;
1c79356b	102
9bccf70c A	103	p[i] ^= ri;
9bccf70c A	104	}
1c79356b	105
9bccf70c A	106	in[0] = 0L;
	107	in[1] = 0L;
	108	for (i = 0; i < BF_ROUNDS + 2; i += 2) {
	109	BF_encrypt(in, key, BF_ENCRYPT);
	110	p[i ] = in[0];
	111	p[i+1] = in[1];
1c79356b A	112	}
1c79356b A	113
9bccf70c A	114	p = key->S;
	115	for (i = 0; i < 4 * 256; i += 2) {
	116	BF_encrypt(in, key, BF_ENCRYPT);
	117	p[i ] = in[0];
	118	p[i+1] = in[1];
	119	}
	120	}