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  • Committer: Bazaar Package Importer
  • Author(s): Christoph Martin
  • Date: 2004-05-24 17:02:29 UTC
  • Revision ID: james.westby@ubuntu.com-20040524170229-ixlo08bbbly0xied
Tags: upstream-0.9.7d
Import upstream version 0.9.7d

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crypto/rc2/rc2_skey.c
 
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/* crypto/rc2/rc2_skey.c */
 
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
 
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 * All rights reserved.
 
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 *
 
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 * This package is an SSL implementation written
 
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 * by Eric Young (eay@cryptsoft.com).
 
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 * The implementation was written so as to conform with Netscapes SSL.
 
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 * 
 
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 * This library is free for commercial and non-commercial use as long as
 
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 * the following conditions are aheared to.  The following conditions
 
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 * apply to all code found in this distribution, be it the RC4, RSA,
 
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 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
 
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 * included with this distribution is covered by the same copyright terms
 
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 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
 
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 * 
 
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 * Copyright remains Eric Young's, and as such any Copyright notices in
 
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 * the code are not to be removed.
 
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 * If this package is used in a product, Eric Young should be given attribution
 
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 * as the author of the parts of the library used.
 
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 * This can be in the form of a textual message at program startup or
 
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 * in documentation (online or textual) provided with the package.
 
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 * 
 
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 * Redistribution and use in source and binary forms, with or without
 
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 * modification, are permitted provided that the following conditions
 
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 * are met:
 
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 * 1. Redistributions of source code must retain the copyright
 
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 *    notice, this list of conditions and the following disclaimer.
 
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 * 2. Redistributions in binary form must reproduce the above copyright
 
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 *    notice, this list of conditions and the following disclaimer in the
 
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 *    documentation and/or other materials provided with the distribution.
 
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 * 3. All advertising materials mentioning features or use of this software
 
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 *    must display the following acknowledgement:
 
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 *    "This product includes cryptographic software written by
 
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 *     Eric Young (eay@cryptsoft.com)"
 
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 *    The word 'cryptographic' can be left out if the rouines from the library
 
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 *    being used are not cryptographic related :-).
 
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 * 4. If you include any Windows specific code (or a derivative thereof) from 
 
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 *    the apps directory (application code) you must include an acknowledgement:
 
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 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
 
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 * 
 
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 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
 
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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 
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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 
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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 
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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 
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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 
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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 
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 * SUCH DAMAGE.
 
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 * 
 
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 * The licence and distribution terms for any publically available version or
 
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 * derivative of this code cannot be changed.  i.e. this code cannot simply be
 
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 * copied and put under another distribution licence
 
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 * [including the GNU Public Licence.]
 
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 */
 
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#include <openssl/rc2.h>
 
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#include "rc2_locl.h"
 
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static unsigned char key_table[256]={
 
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        0xd9,0x78,0xf9,0xc4,0x19,0xdd,0xb5,0xed,0x28,0xe9,0xfd,0x79,
 
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        0x4a,0xa0,0xd8,0x9d,0xc6,0x7e,0x37,0x83,0x2b,0x76,0x53,0x8e,
 
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        0x62,0x4c,0x64,0x88,0x44,0x8b,0xfb,0xa2,0x17,0x9a,0x59,0xf5,
 
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        0x87,0xb3,0x4f,0x13,0x61,0x45,0x6d,0x8d,0x09,0x81,0x7d,0x32,
 
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        0xbd,0x8f,0x40,0xeb,0x86,0xb7,0x7b,0x0b,0xf0,0x95,0x21,0x22,
 
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        0x5c,0x6b,0x4e,0x82,0x54,0xd6,0x65,0x93,0xce,0x60,0xb2,0x1c,
 
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        0x73,0x56,0xc0,0x14,0xa7,0x8c,0xf1,0xdc,0x12,0x75,0xca,0x1f,
 
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        0x3b,0xbe,0xe4,0xd1,0x42,0x3d,0xd4,0x30,0xa3,0x3c,0xb6,0x26,
 
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        0x6f,0xbf,0x0e,0xda,0x46,0x69,0x07,0x57,0x27,0xf2,0x1d,0x9b,
 
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        0xbc,0x94,0x43,0x03,0xf8,0x11,0xc7,0xf6,0x90,0xef,0x3e,0xe7,
 
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        0x06,0xc3,0xd5,0x2f,0xc8,0x66,0x1e,0xd7,0x08,0xe8,0xea,0xde,
 
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        0x80,0x52,0xee,0xf7,0x84,0xaa,0x72,0xac,0x35,0x4d,0x6a,0x2a,
 
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        0x96,0x1a,0xd2,0x71,0x5a,0x15,0x49,0x74,0x4b,0x9f,0xd0,0x5e,
 
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        0x04,0x18,0xa4,0xec,0xc2,0xe0,0x41,0x6e,0x0f,0x51,0xcb,0xcc,
 
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        0x24,0x91,0xaf,0x50,0xa1,0xf4,0x70,0x39,0x99,0x7c,0x3a,0x85,
 
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        0x23,0xb8,0xb4,0x7a,0xfc,0x02,0x36,0x5b,0x25,0x55,0x97,0x31,
 
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        0x2d,0x5d,0xfa,0x98,0xe3,0x8a,0x92,0xae,0x05,0xdf,0x29,0x10,
 
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        0x67,0x6c,0xba,0xc9,0xd3,0x00,0xe6,0xcf,0xe1,0x9e,0xa8,0x2c,
 
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        0x63,0x16,0x01,0x3f,0x58,0xe2,0x89,0xa9,0x0d,0x38,0x34,0x1b,
 
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        0xab,0x33,0xff,0xb0,0xbb,0x48,0x0c,0x5f,0xb9,0xb1,0xcd,0x2e,
 
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        0xc5,0xf3,0xdb,0x47,0xe5,0xa5,0x9c,0x77,0x0a,0xa6,0x20,0x68,
 
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        0xfe,0x7f,0xc1,0xad,
 
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        };
 
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/* It has come to my attention that there are 2 versions of the RC2
 
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 * key schedule.  One which is normal, and anther which has a hook to
 
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 * use a reduced key length.
 
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 * BSAFE uses the 'retarded' version.  What I previously shipped is
 
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 * the same as specifying 1024 for the 'bits' parameter.  Bsafe uses
 
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 * a version where the bits parameter is the same as len*8 */
 
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void RC2_set_key(RC2_KEY *key, int len, const unsigned char *data, int bits)
 
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        {
 
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        int i,j;
 
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        unsigned char *k;
 
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        RC2_INT *ki;
 
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        unsigned int c,d;
 
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        k= (unsigned char *)&(key->data[0]);
 
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        *k=0; /* for if there is a zero length key */
 
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        if (len > 128) len=128;
 
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        if (bits <= 0) bits=1024;
 
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        if (bits > 1024) bits=1024;
 
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        for (i=0; i<len; i++)
 
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                k[i]=data[i];
 
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        /* expand table */
 
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        d=k[len-1];
 
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        j=0;
 
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        for (i=len; i < 128; i++,j++)
 
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                {
 
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                d=key_table[(k[j]+d)&0xff];
 
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                k[i]=d;
 
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                }
 
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        /* hmm.... key reduction to 'bits' bits */
 
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        j=(bits+7)>>3;
 
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        i=128-j;
 
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        c= (0xff>>(-bits & 0x07));
 
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        d=key_table[k[i]&c];
 
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        k[i]=d;
 
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        while (i--)
 
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                {
 
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                d=key_table[k[i+j]^d];
 
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                k[i]=d;
 
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                }
 
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        /* copy from bytes into RC2_INT's */
 
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        ki= &(key->data[63]);
 
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        for (i=127; i>=0; i-=2)
 
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                *(ki--)=((k[i]<<8)|k[i-1])&0xffff;
 
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        }
 
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