1 /* crypto/des/rpc_enc.c */

     2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)

     3  * All rights reserved.

     4  *

     5  * This package is an SSL implementation written

     6  * by Eric Young (eay@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@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@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@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 "rpc_des.h"

    60 #include "des_locl.h"

    61 #include "des_ver.h"

    62 

    63 EXPORT_C int _des_crypt(char *buf,int len,struct desparams *desp);

    64 EXPORT_C int _des_crypt(char *buf, int len, struct desparams *desp)

    65 	{

    66 	DES_key_schedule ks;

    67 	int enc;

    68 

    69 	DES_set_key_unchecked(&desp->des_key,&ks);

    70 	enc=(desp->des_dir == ENCRYPT)?DES_ENCRYPT:DES_DECRYPT;

    71 

    72 	if (desp->des_mode == CBC)

    73 		DES_ecb_encrypt((const_DES_cblock *)desp->UDES.UDES_buf,

    74 				(DES_cblock *)desp->UDES.UDES_buf,&ks,

    75 				enc);

    76 	else

    77 		{

    78 		DES_ncbc_encrypt(desp->UDES.UDES_buf,desp->UDES.UDES_buf,

    79 				len,&ks,&desp->des_ivec,enc);

    80 #ifdef undef

    81 		/* len will always be %8 if called from common_crypt

    82 		 * in secure_rpc.

    83 		 * Libdes's cbc encrypt does not copy back the iv,

    84 		 * so we have to do it here. */

    85 		/* It does now :-) eay 20/09/95 */

    86 

    87 		a=(char *)&(desp->UDES.UDES_buf[len-8]);

    88 		b=(char *)&(desp->des_ivec[0]);

    89 

    90 		*(a++)= *(b++); *(a++)= *(b++);

    91 		*(a++)= *(b++); *(a++)= *(b++);

    92 		*(a++)= *(b++); *(a++)= *(b++);

    93 		*(a++)= *(b++); *(a++)= *(b++);

    94 #endif

    95 		}

    96 	return(1);	

    97 	}

    98