crypto/dist/heimdal/lib/krb5/copy_host_realm.c

   1 /*
   2  * Copyright (c) 1999 - 2001 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. Neither the name of the Institute nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #include "krb5_locl.h"
  35
  36 __RCSID("$Heimdal: copy_host_realm.c 22057 2007-11-11 15:13:13Z lha $"
  37         "$NetBSD$");
  38
  39 /**
  40  * Copy the list of realms from `from' to `to'.
  41  *
  42  * @param context Kerberos 5 context.
  43  * @param from list of realms to copy from.
  44  * @param to list of realms to copy to, free list of krb5_free_host_realm().
  45  *
  46  * @return Returns 0 to indicate success. Otherwise an kerberos et
  47  * error code is returned, see krb5_get_error_message().
  48  *
  49  * @ingroup krb5
  50  */
  51
  52 krb5_error_code KRB5_LIB_FUNCTION
  53 krb5_copy_host_realm(krb5_context context,
  54                      const krb5_realm *from,
  55                      krb5_realm **to)
  56 {
  57     int n, i;
  58     const krb5_realm *p;
  59
  60     for (n = 0, p = from; *p != NULL; ++p)
  61         ++n;
  62     ++n;
  63     *to = malloc (n * sizeof(**to));
  64     if (*to == NULL) {
  65         krb5_set_error_string (context, "malloc: out of memory");
  66         return ENOMEM;
  67     }
  68     for (i = 0; i < n; ++i)
  69         (*to)[i] = NULL;
  70     for (i = 0, p = from; *p != NULL; ++p, ++i) {
  71         (*to)[i] = strdup(*p);
  72         if ((*to)[i] == NULL) {
  73             krb5_free_host_realm (context, *to);
  74             krb5_set_error_string (context, "malloc: out of memory");
  75             return ENOMEM;
  76         }
  77     }
  78     return 0;
  79 }