Return to bf_skey.c CVS log

Up to [truecrypt] / truecrypt / crypto

Annotation of truecrypt/crypto/bf_skey.c, revision 1.1.1.4

1.1.1.4 ! root        1: /* Deprecated/legacy */
        !             2: 
1.1       root        3: /* crypto/bf/bf_skey.c */
                      4: /* Copyright (C) 1995-1997 Eric Young ([email protected])
                      5:  * All rights reserved.
                      6:  *
                      7:  * This package is an SSL implementation written
                      8:  * by Eric Young ([email protected]).
                      9:  * The implementation was written so as to conform with Netscapes SSL.
                     10:  * 
                     11:  * This library is free for commercial and non-commercial use as long as
                     12:  * the following conditions are aheared to.  The following conditions
                     13:  * apply to all code found in this distribution, be it the RC4, RSA,
                     14:  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
                     15:  * included with this distribution is covered by the same copyright terms
                     16:  * except that the holder is Tim Hudson ([email protected]).
                     17:  * 
                     18:  * Copyright remains Eric Young's, and as such any Copyright notices in
                     19:  * the code are not to be removed.
                     20:  * If this package is used in a product, Eric Young should be given attribution
                     21:  * as the author of the parts of the library used.
                     22:  * This can be in the form of a textual message at program startup or
                     23:  * in documentation (online or textual) provided with the package.
                     24:  * 
                     25:  * Redistribution and use in source and binary forms, with or without
                     26:  * modification, are permitted provided that the following conditions
                     27:  * are met:
                     28:  * 1. Redistributions of source code must retain the copyright
                     29:  *    notice, this list of conditions and the following disclaimer.
                     30:  * 2. Redistributions in binary form must reproduce the above copyright
                     31:  *    notice, this list of conditions and the following disclaimer in the
                     32:  *    documentation and/or other materials provided with the distribution.
                     33:  * 3. All advertising materials mentioning features or use of this software
                     34:  *    must display the following acknowledgement:
                     35:  *    "This product includes cryptographic software written by
                     36:  *     Eric Young ([email protected])"
                     37:  *    The word 'cryptographic' can be left out if the rouines from the library
                     38:  *    being used are not cryptographic related :-).
                     39:  * 4. If you include any Windows specific code (or a derivative thereof) from 
                     40:  *    the apps directory (application code) you must include an acknowledgement:
                     41:  *    "This product includes software written by Tim Hudson ([email protected])"
                     42:  * 
                     43:  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
                     44:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     45:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     46:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
                     47:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     48:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     49:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     50:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     51:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     52:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     53:  * SUCH DAMAGE.
                     54:  * 
                     55:  * The licence and distribution terms for any publically available version or
                     56:  * derivative of this code cannot be changed.  i.e. this code cannot simply be
                     57:  * copied and put under another distribution licence
                     58:  * [including the GNU Public Licence.]
                     59:  */
                     60: 
1.1.1.2   root       61: #ifndef LINUX_DRIVER
1.1       root       62: #include <stdio.h>
                     63: #include <string.h>
1.1.1.2   root       64: #else
                     65: #include <linux/string.h>
                     66: #endif
                     67: 
                     68: #include "Blowfish.h"
                     69: #include "Bf_locl.h"
                     70: #include "Bf_pi.h"
1.1       root       71: 
1.1.1.3   root       72: void BF_set_key(key,len,data)
1.1       root       73: BF_KEY *key;
                     74: int len;
                     75: unsigned char *data;
                     76:        {
                     77:        int i;
                     78:        BF_LONG *p,ri,in[2];
                     79:        unsigned char *d,*end;
                     80: 
                     81: 
                     82:        memcpy((char *)key,(char *)&bf_init,sizeof(BF_KEY));
                     83:        p=key->P;
                     84: 
                     85:        if (len > ((BF_ROUNDS+2)*4)) len=(BF_ROUNDS+2)*4;
                     86: 
                     87:        d=data;
                     88:        end= &(data[len]);
                     89:        for (i=0; i<(BF_ROUNDS+2); i++)
                     90:                {
                     91:                ri= *(d++);
                     92:                if (d >= end) d=data;
                     93: 
                     94:                ri<<=8;
                     95:                ri|= *(d++);
                     96:                if (d >= end) d=data;
                     97: 
                     98:                ri<<=8;
                     99:                ri|= *(d++);
                    100:                if (d >= end) d=data;
                    101: 
                    102:                ri<<=8;
                    103:                ri|= *(d++);
                    104:                if (d >= end) d=data;
                    105: 
                    106:                p[i]^=ri;
                    107:                }
                    108: 
                    109:        in[0]=0L;
                    110:        in[1]=0L;
                    111:        for (i=0; i<(BF_ROUNDS+2); i+=2)
                    112:                {
                    113:                BF_encrypt(in,key);
                    114:                p[i  ]=in[0];
                    115:                p[i+1]=in[1];
                    116:                }
                    117: 
                    118:        p=key->S;
                    119:        for (i=0; i<4*256; i+=2)
                    120:                {
                    121:                BF_encrypt(in,key);
                    122:                p[i  ]=in[0];
                    123:                p[i+1]=in[1];
                    124:                }
                    125:        }
                    126: 

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.