admin/copy.c

   1 /*
   2  * Copyright (c) 1997-2004 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 "ktutil_locl.h"
  35
  36 RCSID("$Id$");
  37
  38
  39 static krb5_boolean
  40 compare_keyblock(const krb5_keyblock *a, const krb5_keyblock *b)
  41 {
  42     if(a->keytype != b->keytype ||
  43        a->keyvalue.length != b->keyvalue.length ||
  44        memcmp(a->keyvalue.data, b->keyvalue.data, a->keyvalue.length) != 0)
  45         return FALSE;
  46     return TRUE;
  47 }
  48
  49 int
  50 kt_copy (struct copy_options *opt, int argc, char **argv)
  51 {
  52     krb5_error_code ret;
  53     krb5_keytab src_keytab, dst_keytab;
  54     krb5_kt_cursor cursor;
  55     krb5_keytab_entry entry, dummy;
  56     const char *from = argv[0];
  57     const char *to = argv[1];
  58
  59     ret = krb5_kt_resolve (context, from, &src_keytab);
  60     if (ret) {
  61         krb5_warn (context, ret, "resolving src keytab `%s'", from);
  62         return 1;
  63     }
  64
  65     ret = krb5_kt_resolve (context, to, &dst_keytab);
  66     if (ret) {
  67         krb5_kt_close (context, src_keytab);
  68         krb5_warn (context, ret, "resolving dst keytab `%s'", to);
  69         return 1;
  70     }
  71
  72     ret = krb5_kt_start_seq_get (context, src_keytab, &cursor);
  73     if (ret) {
  74         krb5_warn (context, ret, "krb5_kt_start_seq_get %s", keytab_string);
  75         goto out;
  76     }
  77
  78     if (verbose_flag)
  79         fprintf(stderr, "copying %s to %s\n", from, to);
  80
  81     while((ret = krb5_kt_next_entry(context, src_keytab,
  82                                     &entry, &cursor)) == 0) {
  83         char *name_str;
  84         char *etype_str;
  85         ret = krb5_unparse_name (context, entry.principal, &name_str);
  86         if(ret) {
  87             krb5_warn(context, ret, "krb5_unparse_name");
  88             name_str = NULL; /* XXX */
  89         }
  90         ret = krb5_enctype_to_string(context, entry.keyblock.keytype, &etype_str);
  91         if(ret) {
  92             krb5_warn(context, ret, "krb5_enctype_to_string");
  93             etype_str = NULL; /* XXX */
  94         }
  95         ret = krb5_kt_get_entry(context, dst_keytab,
  96                                 entry.principal,
  97                                 entry.vno,
  98                                 entry.keyblock.keytype,
  99                                 &dummy);
 100         if(ret == 0) {
 101             /* this entry is already in the new keytab, so no need to
 102                copy it; if the keyblocks are not the same, something
 103                is weird, so complain about that */
 104             if(!compare_keyblock(&entry.keyblock, &dummy.keyblock)) {
 105                 krb5_warnx(context, "entry with different keyvalue "
 106                            "already exists for %s, keytype %s, kvno %d",
 107                            name_str, etype_str, entry.vno);
 108             }
 109             if (!opt->copy_duplicates_flag) {
 110                 krb5_kt_free_entry(context, &dummy);
 111                 krb5_kt_free_entry (context, &entry);
 112                 free(name_str);
 113                 free(etype_str);
 114                 continue;
 115             }
 116             /*
 117              * Because we can end up trying all keys that match the enctype,
 118              * copying entries with duplicate principal, vno, and enctype, but
 119              * different keys, can be useful.
 120              */
 121         } else if(ret != KRB5_KT_NOTFOUND) {
 122             krb5_warn (context, ret, "%s: fetching %s/%s/%u",
 123                        to, name_str, etype_str, entry.vno);
 124             krb5_kt_free_entry (context, &entry);
 125             free(name_str);
 126             free(etype_str);
 127             break;
 128         }
 129         if (verbose_flag)
 130             fprintf (stderr, "copying %s, keytype %s, kvno %d\n", name_str,
 131                      etype_str, entry.vno);
 132         ret = krb5_kt_add_entry (context, dst_keytab, &entry);
 133         krb5_kt_free_entry (context, &entry);
 134         if (ret) {
 135             krb5_warn (context, ret, "%s: adding %s/%s/%u",
 136                        to, name_str, etype_str, entry.vno);
 137             free(name_str);
 138             free(etype_str);
 139             break;
 140         }
 141         free(name_str);
 142         free(etype_str);
 143     }
 144     krb5_kt_end_seq_get (context, src_keytab, &cursor);
 145
 146   out:
 147     krb5_kt_close (context, src_keytab);
 148     krb5_kt_close (context, dst_keytab);
 149     return ret != 0;
 150 }