src/lib/krb5/krb/copy_creds.c

   1 /*
   2  * lib/krb5/krb/copy_creds.c
   3  *
   4  * Copyright 1990,1991 by the Massachusetts Institute of Technology.
   5  * All Rights Reserved.
   6  *
   7  * Export of this software from the United States of America may
   8  *   require a specific license from the United States Government.
   9  *   It is the responsibility of any person or organization contemplating
  10  *   export to obtain such a license before exporting.
  11  *
  12  * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
  13  * distribute this software and its documentation for any purpose and
  14  * without fee is hereby granted, provided that the above copyright
  15  * notice appear in all copies and that both that copyright notice and
  16  * this permission notice appear in supporting documentation, and that
  17  * the name of M.I.T. not be used in advertising or publicity pertaining
  18  * to distribution of the software without specific, written prior
  19  * permission.  M.I.T. makes no representations about the suitability of
  20  * this software for any purpose.  It is provided "as is" without express
  21  * or implied warranty.
  22  *
  23  *
  24  * krb5_copy_cred()
  25  */
  26
  27 #include "k5-int.h"
  28
  29 /*
  30  * Copy credentials, allocating fresh storage where needed.
  31  */
  32
  33 krb5_error_code INTERFACE
  34 krb5_copy_creds(context, incred, outcred)
  35     krb5_context context;
  36     const krb5_creds *incred;
  37     krb5_creds **outcred;
  38 {
  39     krb5_creds *tempcred;
  40     krb5_error_code retval;
  41     krb5_data *scratch;
  42
  43     if (!(tempcred = (krb5_creds *)malloc(sizeof(*tempcred))))
  44         return ENOMEM;
  45
  46     *tempcred = *incred;                /* copy everything quickly */
  47     retval = krb5_copy_principal(context, incred->client, &tempcred->client);
  48     if (retval)
  49         goto cleanlast;
  50     retval = krb5_copy_principal(context, incred->server, &tempcred->server);
  51     if (retval)
  52         goto cleanclient;
  53     retval = krb5_copy_keyblock_contents(context, &incred->keyblock,
  54                                          &tempcred->keyblock);
  55     if (retval)
  56         goto cleanserver;
  57     retval = krb5_copy_addresses(context, incred->addresses, &tempcred->addresses);
  58     if (retval)
  59         goto cleanblock;
  60     retval = krb5_copy_data(context, &incred->ticket, &scratch);
  61     if (retval)
  62         goto cleanaddrs;
  63     tempcred->ticket = *scratch;
  64     krb5_xfree(scratch);
  65     retval = krb5_copy_data(context, &incred->second_ticket, &scratch);
  66     if (retval)
  67         goto cleanticket;
  68
  69     tempcred->second_ticket = *scratch;
  70     krb5_xfree(scratch);
  71
  72     retval = krb5_copy_authdata(context, incred->authdata,&tempcred->authdata);
  73     if (retval)
  74         goto clearticket;
  75
  76     *outcred = tempcred;
  77     return 0;
  78
  79  clearticket:
  80     memset(tempcred->ticket.data,0,tempcred->ticket.length);
  81  cleanticket:
  82     free(tempcred->ticket.data);
  83  cleanaddrs:
  84     krb5_free_addresses(context, tempcred->addresses);
  85  cleanblock:
  86     krb5_xfree(tempcred->keyblock.contents);
  87  cleanserver:
  88     krb5_free_principal(context, tempcred->server);
  89  cleanclient:
  90     krb5_free_principal(context, tempcred->client);
  91  cleanlast:
  92     krb5_xfree(tempcred);
  93     return retval;
  94 }