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      1 /* crypto/bf/bf_skey.c */
      2 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com)
      3  * All rights reserved.
      4  *
      5  * This package is an SSL implementation written
      6  * by Eric Young (eay (at) 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 (at) 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 (at) 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 (at) 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 <stdio.h>
     60 #include <string.h>
     61 #include <openssl/crypto.h>
     62 #include <openssl/blowfish.h>
     63 #include "bf_locl.h"
     64 #include "bf_pi.h"
     65 
     66 void BF_set_key(BF_KEY *key, int len, const unsigned char *data)
     67 #ifdef OPENSSL_FIPS
     68 	{
     69 	fips_cipher_abort(BLOWFISH);
     70 	private_BF_set_key(key, len, data);
     71 	}
     72 void private_BF_set_key(BF_KEY *key, int len, const unsigned char *data)
     73 #endif
     74 	{
     75 	int i;
     76 	BF_LONG *p,ri,in[2];
     77 	const unsigned char *d,*end;
     78 
     79 
     80 	memcpy(key,&bf_init,sizeof(BF_KEY));
     81 	p=key->P;
     82 
     83 	if (len > ((BF_ROUNDS+2)*4)) len=(BF_ROUNDS+2)*4;
     84 
     85 	d=data;
     86 	end= &(data[len]);
     87 	for (i=0; i<(BF_ROUNDS+2); i++)
     88 		{
     89 		ri= *(d++);
     90 		if (d >= end) d=data;
     91 
     92 		ri<<=8;
     93 		ri|= *(d++);
     94 		if (d >= end) d=data;
     95 
     96 		ri<<=8;
     97 		ri|= *(d++);
     98 		if (d >= end) d=data;
     99 
    100 		ri<<=8;
    101 		ri|= *(d++);
    102 		if (d >= end) d=data;
    103 
    104 		p[i]^=ri;
    105 		}
    106 
    107 	in[0]=0L;
    108 	in[1]=0L;
    109 	for (i=0; i<(BF_ROUNDS+2); i+=2)
    110 		{
    111 		BF_encrypt(in,key);
    112 		p[i  ]=in[0];
    113 		p[i+1]=in[1];
    114 		}
    115 
    116 	p=key->S;
    117 	for (i=0; i<4*256; i+=2)
    118 		{
    119 		BF_encrypt(in,key);
    120 		p[i  ]=in[0];
    121 		p[i+1]=in[1];
    122 		}
    123 	}
    124 
    125