1  /*
  2   * Copyright (c) 2001-2004 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  int
 39  kt_rename(struct rename_options *opt, int argc, char **argv)
 40  {
 41      krb5_error_code ret = 0;
 42      krb5_keytab_entry entry;
 43      krb5_keytab keytab;
 44      krb5_kt_cursor cursor;
 45      krb5_principal from_princ, to_princ;
 46  
 47      ret = krb5_parse_name(context, argv[0], &from_princ);
 48      if(ret != 0) {
 49  	krb5_warn(context, ret, "%s", argv[0]);
 50  	return 1;
 51      }
 52  
 53      ret = krb5_parse_name(context, argv[1], &to_princ);
 54      if(ret != 0) {
 55  	krb5_free_principal(context, from_princ);
 56  	krb5_warn(context, ret, "%s", argv[1]);
 57  	return 1;
 58      }
 59  
 60      if((keytab = ktutil_open_keytab()) == NULL) {
 61  	krb5_free_principal(context, from_princ);
 62  	krb5_free_principal(context, to_princ);
 63  	return 1;
 64      }
 65  
 66      ret = krb5_kt_start_seq_get(context, keytab, &cursor);
 67      if(ret) {
 68  	krb5_kt_close(context, keytab);
 69  	krb5_free_principal(context, from_princ);
 70  	krb5_free_principal(context, to_princ);
 71  	return 1;
 72      }
 73      while(1) {
 74  	ret = krb5_kt_next_entry(context, keytab, &entry, &cursor);
 75  	if(ret != 0) {
 76  	    if(ret != KRB5_CC_END && ret != KRB5_KT_END)
 77  		krb5_warn(context, ret, "getting entry from keytab");
 78  	    else
 79  		ret = 0;
 80  	    break;
 81  	}
 82  	if(krb5_principal_compare(context, entry.principal, from_princ)) {
 83  	    krb5_free_principal(context, entry.principal);
 84  	    entry.principal = to_princ;
 85  	    ret = krb5_kt_add_entry(context, keytab, &entry);
 86  	    if(ret) {
 87  		entry.principal = NULL;
 88  		krb5_kt_free_entry(context, &entry);
 89  		krb5_warn(context, ret, "adding entry");
 90  		break;
 91  	    }
 92  	    if (opt->delete_flag) {
 93  		entry.principal = from_princ;
 94  		ret = krb5_kt_remove_entry(context, keytab, &entry);
 95  		if(ret) {
 96  		    entry.principal = NULL;
 97  		    krb5_kt_free_entry(context, &entry);
 98  		    krb5_warn(context, ret, "removing entry");
 99  		    break;
100  		}
101  	    }
102  	    entry.principal = NULL;
103  	}
104  	krb5_kt_free_entry(context, &entry);
105      }
106      krb5_kt_end_seq_get(context, keytab, &cursor);
107  
108      krb5_free_principal(context, from_princ);
109      krb5_free_principal(context, to_princ);
110  
111      return ret != 0;
112  }
113