1 /* 2 * Copyright (c) 1997 - 2001, 2003 Kungliga Tekniska H�gskolan 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: change.c,v 1.5 2003/04/01 15:04:49 lha Exp $"); 37 38 static void 39 change_entry (krb5_context context, krb5_keytab keytab, 40 krb5_principal principal, krb5_kvno kvno, 41 const char *realm, const char *admin_server, int server_port) 42 { 43 krb5_error_code ret; 44 kadm5_config_params conf; 45 void *kadm_handle; 46 char *client_name; 47 krb5_keyblock *keys; 48 int num_keys; 49 int i; 50 51 ret = krb5_unparse_name (context, principal, &client_name); 52 if (ret) { 53 krb5_warn (context, ret, "krb5_unparse_name"); 54 return; 55 } 56 57 memset (&conf, 0, sizeof(conf)); 58 59 if(realm) 60 conf.realm = (char *)realm; 61 else 62 conf.realm = *krb5_princ_realm (context, principal); 63 conf.mask |= KADM5_CONFIG_REALM; 64 65 if (admin_server) { 66 conf.admin_server = (char *)admin_server; 67 conf.mask |= KADM5_CONFIG_ADMIN_SERVER; 68 } 69 70 if (server_port) { 71 conf.kadmind_port = htons(server_port); 72 conf.mask |= KADM5_CONFIG_KADMIND_PORT; 73 } 74 75 ret = kadm5_init_with_skey_ctx (context, 76 client_name, 77 keytab_string, 78 KADM5_ADMIN_SERVICE, 79 &conf, 0, 0, 80 &kadm_handle); 81 free (client_name); 82 if (ret) { 83 krb5_warn (context, ret, "kadm5_c_init_with_skey_ctx"); 84 return; 85 } 86 ret = kadm5_randkey_principal (kadm_handle, principal, &keys, &num_keys); 87 kadm5_destroy (kadm_handle); 88 if (ret) { 89 krb5_warn(context, ret, "kadm5_randkey_principal"); 90 return; 91 } 92 for (i = 0; i < num_keys; ++i) { 93 krb5_keytab_entry new_entry; 94 95 new_entry.principal = principal; 96 new_entry.timestamp = time (NULL); 97 new_entry.vno = kvno + 1; 98 new_entry.keyblock = keys[i]; 99 100 ret = krb5_kt_add_entry (context, keytab, &new_entry); 101 if (ret) 102 krb5_warn (context, ret, "krb5_kt_add_entry"); 103 krb5_free_keyblock_contents (context, &keys[i]); 104 } 105 } 106 107 /* 108 * loop over all the entries in the keytab (or those given) and change 109 * their keys, writing the new keys 110 */ 111 112 struct change_set { 113 krb5_principal principal; 114 krb5_kvno kvno; 115 }; 116 117 int 118 kt_change (int argc, char **argv) 119 { 120 krb5_error_code ret; 121 krb5_keytab keytab; 122 krb5_kt_cursor cursor; 123 krb5_keytab_entry entry; 124 char *realm = NULL; 125 char *admin_server = NULL; 126 int server_port = 0; 127 int help_flag = 0; 128 int optind = 0; 129 int i, j, max; 130 struct change_set *changeset; 131 132 struct getargs args[] = { 133 { "realm", 'r', arg_string, NULL, 134 "realm to use", "realm" 135 }, 136 { "admin-server", 'a', arg_string, NULL, 137 "server to contact", "host" 138 }, 139 { "server-port", 's', arg_integer, NULL, 140 "port to contact", "port number" 141 }, 142 { "help", 'h', arg_flag, NULL } 143 }; 144 145 args[0].value = &realm; 146 args[1].value = &admin_server; 147 args[2].value = &server_port; 148 args[3].value = &help_flag; 149 150 if(getarg(args, sizeof(args) / sizeof(args[0]), argc, argv, &optind) 151 || help_flag) { 152 arg_printusage(args, sizeof(args) / sizeof(args[0]), 153 "ktutil change", "principal..."); 154 return 1; 155 } 156 157 if((keytab = ktutil_open_keytab()) == NULL) 158 return 1; 159 160 j = 0; 161 max = 0; 162 changeset = NULL; 163 164 ret = krb5_kt_start_seq_get(context, keytab, &cursor); 165 if(ret){ 166 krb5_warn(context, ret, "krb5_kt_start_seq_get %s", keytab_string); 167 goto out; 168 } 169 170 while((ret = krb5_kt_next_entry(context, keytab, &entry, &cursor)) == 0) { 171 int add = 0; 172 173 for (i = 0; i < j; ++i) { 174 if (krb5_principal_compare (context, changeset[i].principal, 175 entry.principal)) { 176 if (changeset[i].kvno < entry.vno) 177 changeset[i].kvno = entry.vno; 178 break; 179 } 180 } 181 if (i < j) 182 continue; 183 184 if (optind == argc) { 185 add = 1; 186 } else { 187 for (i = optind; i < argc; ++i) { 188 krb5_principal princ; 189 190 ret = krb5_parse_name (context, argv[i], &princ); 191 if (ret) { 192 krb5_warn (context, ret, "krb5_parse_name %s", argv[i]); 193 continue; 194 } 195 if (krb5_principal_compare (context, princ, entry.principal)) 196 add = 1; 197 198 krb5_free_principal (context, princ); 199 } 200 } 201 202 if (add) { 203 if (j >= max) { 204 void *tmp; 205 206 max = max(max * 2, 1); 207 tmp = realloc (changeset, max * sizeof(*changeset)); 208 if (tmp == NULL) { 209 krb5_kt_free_entry (context, &entry); 210 krb5_warnx (context, "realloc: out of memory"); 211 ret = ENOMEM; 212 break; 213 } 214 changeset = tmp; 215 } 216 ret = krb5_copy_principal (context, entry.principal, 217 &changeset[j].principal); 218 if (ret) { 219 krb5_warn (context, ret, "krb5_copy_principal"); 220 krb5_kt_free_entry (context, &entry); 221 break; 222 } 223 changeset[j].kvno = entry.vno; 224 ++j; 225 } 226 krb5_kt_free_entry (context, &entry); 227 } 228 229 if (ret == KRB5_KT_END) { 230 for (i = 0; i < j; i++) { 231 if (verbose_flag) { 232 char *client_name; 233 234 ret = krb5_unparse_name (context, changeset[i].principal, 235 &client_name); 236 if (ret) { 237 krb5_warn (context, ret, "krb5_unparse_name"); 238 } else { 239 printf("Changing %s kvno %d\n", 240 client_name, changeset[i].kvno); 241 free(client_name); 242 } 243 } 244 change_entry (context, keytab, 245 changeset[i].principal, changeset[i].kvno, 246 realm, admin_server, server_port); 247 } 248 } 249 for (i = 0; i < j; i++) 250 krb5_free_principal (context, changeset[i].principal); 251 free (changeset); 252 253 ret = krb5_kt_end_seq_get(context, keytab, &cursor); 254 out: 255 krb5_kt_close(context, keytab); 256 return 0; 257 } 258