usr/src/uts/common/gssapi/mechs/krb5/crypto/default_state.c

   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