lib/krb5/creds.c

   1 /*
   2  * Copyright (c) 1997 Kungliga Tekniska Högskolan
   3  * (Royal Institute of Technology, Stockholm, Sweden).
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  *
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  *
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * 3. All advertising materials mentioning features or use of this software
  18  *    must display the following acknowledgement:
  19  *      This product includes software developed by Kungliga Tekniska
  20  *      Högskolan and its contributors.
  21  *
  22  * 4. Neither the name of the Institute nor the names of its contributors
  23  *    may be used to endorse or promote products derived from this software
  24  *    without specific prior written permission.
  25  *
  26  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  28  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  29  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  30  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  31  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  32  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  33  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  34  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  35  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  36  * SUCH DAMAGE.
  37  */
  38
  39 #include "krb5_locl.h"
  40
  41 RCSID("$Id$");
  42
  43 krb5_error_code
  44 krb5_free_creds_contents (krb5_context context, krb5_creds *c)
  45 {
  46     krb5_free_principal (context, c->client);
  47     c->client = NULL;
  48     krb5_free_principal (context, c->server);
  49     c->server = NULL;
  50     krb5_free_keyblock_contents (context, &c->session);
  51     krb5_data_free (&c->ticket);
  52     krb5_data_free (&c->second_ticket);
  53     krb5_data_free (&c->authdata);
  54     krb5_free_addresses (context, &c->addresses);
  55     return 0;
  56 }
  57
  58 krb5_error_code
  59 krb5_copy_creds_contents (krb5_context context,
  60                           const krb5_creds *incred,
  61                           krb5_creds *c)
  62 {
  63     krb5_error_code ret;
  64
  65     memset(c, 0, sizeof(*c));
  66     ret = krb5_copy_principal (context, incred->client, &c->client);
  67     if (ret)
  68         goto fail;
  69     ret = krb5_copy_principal (context, incred->server, &c->server);
  70     if (ret)
  71         goto fail;
  72     ret = krb5_copy_keyblock_contents (context, &incred->session, &c->session);
  73     if (ret)
  74         goto fail;
  75     c->times = incred->times;
  76     ret = krb5_data_copy (&c->ticket,
  77                           incred->ticket.data,
  78                           incred->ticket.length);
  79     if (ret)
  80         goto fail;
  81     ret = krb5_data_copy (&c->second_ticket,
  82                           incred->second_ticket.data,
  83                           incred->second_ticket.length);
  84     if (ret)
  85         goto fail;
  86     ret = krb5_data_copy (&c->authdata,
  87                           incred->authdata.data,
  88                           incred->authdata.length);
  89     if (ret)
  90         goto fail;
  91     ret = krb5_copy_addresses (context,
  92                                &incred->addresses,
  93                                &c->addresses);
  94     if (ret)
  95         goto fail;
  96     c->flags = incred->flags;
  97     return 0;
  98
  99 fail:
 100     krb5_free_creds_contents (context, c);
 101     return ret;
 102 }
 103
 104 krb5_error_code
 105 krb5_copy_creds (krb5_context context,
 106                  const krb5_creds *incred,
 107                  krb5_creds **outcred)
 108 {
 109     krb5_creds *c;
 110
 111     c = malloc (sizeof (*c));
 112     if (c == NULL)
 113         return ENOMEM;
 114     memset (c, 0, sizeof(*c));
 115     *outcred = c;
 116     return krb5_copy_creds_contents (context, incred, c);
 117 }
 118
 119 krb5_error_code
 120 krb5_free_creds (krb5_context context, krb5_creds *c)
 121 {
 122     krb5_free_creds_contents (context, c);
 123     free (c);
 124     return 0;
 125 }
 126
 127 krb5_boolean
 128 krb5_compare_creds(krb5_context context, krb5_flags whichfields,
 129                    krb5_creds *mcreds, krb5_creds *creds)
 130 {
 131     krb5_boolean match;
 132     if(whichfields & KRB5_TC_DONT_MATCH_REALM)
 133         match = krb5_principal_compare_any_realm(context,
 134                                                  mcreds->server,
 135                                                  creds->server);
 136     else
 137         match = krb5_principal_compare(context, mcreds->server, creds->server);
 138     if(match && (whichfields & KRB5_TC_MATCH_KEYTYPE) &&
 139        mcreds->session.keytype != creds->session.keytype)
 140         match = FALSE;
 141     return match;
 142 }