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      1 /*
      2  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
      3  * Use is subject to license terms.
      4  */
      5 
      6 
      7 /*
      8  * Copyright (C) 2001 by the Massachusetts Institute of Technology.
      9  * All rights reserved.
     10  *
     11  * Export of this software from the United States of America may
     12  *   require a specific license from the United States Government.
     13  *   It is the responsibility of any person or organization contemplating
     14  *   export to obtain such a license before exporting.
     15  *
     16  * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
     17  * distribute this software and its documentation for any purpose and
     18  * without fee is hereby granted, provided that the above copyright
     19  * notice appear in all copies and that both that copyright notice and
     20  * this permission notice appear in supporting documentation, and that
     21  * the name of M.I.T. not be used in advertising or publicity pertaining
     22  * to distribution of the software without specific, written prior
     23  * permission.  Furthermore if you modify this software you must label
     24  * your software as modified software and not distribute it in such a
     25  * fashion that it might be confused with the original M.I.T. software.
     26  * M.I.T. makes no representations about the suitability of
     27  * this software for any purpose.  It is provided "as is" without express
     28  * or implied warranty.
     29  *
     30  * Section 6 (Encryption) of the Kerberos revisions document defines
     31  * cipher states to be used to chain encryptions and decryptions
     32  * together.  Examples of cipher states include initialization vectors
     33  * for CBC encription.  Most Kerberos encryption systems can share
     34  * code for initializing and freeing cipher states.  This file
     35  * contains that default code.
     36  */
     37 
     38 #include "k5-int.h"
     39 
     40 /* ARGSUSED */
     41 krb5_error_code krb5int_des_init_state
     42 (krb5_context context, const krb5_keyblock *key,
     43 	krb5_keyusage usage, krb5_data *new_state )
     44 {
     45   new_state->length = 8;
     46   new_state->data = (void *) MALLOC(8);
     47   if (new_state->data) {
     48     /* Solaris Kerberos */
     49     (void) memset (new_state->data, 0, new_state->length);
     50     /* We need to copy in the key for des-cbc-cr--ick, but that's how it works*/
     51     if (key->enctype == ENCTYPE_DES_CBC_CRC) {
     52       /* Solaris Kerberos */
     53       (void) memcpy (new_state->data, key->contents, new_state->length);
     54   }
     55   } else {
     56     return ENOMEM;
     57   }
     58   return 0;
     59 }
     60 
     61 /* ARGSUSED */
     62 krb5_error_code krb5int_default_free_state
     63 (krb5_context context, krb5_data *state)
     64 {
     65   if (state->data) {
     66     FREE (state->data, state->length);
     67     state-> data = NULL;
     68     state->length = 0;
     69   }
     70   return 0;
     71 }
     72 
     73 
     74 
     75