/* $NetBSD: change.c,v 1.2.22.1 2023/08/11 13:39:46 martin Exp $ */ /* * Copyright (c) 1997-2005 Kungliga Tekniska Högskolan * (Royal Institute of Technology, Stockholm, Sweden). * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * 3. Neither the name of the Institute nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include "ktutil_locl.h" __RCSID("$NetBSD: change.c,v 1.2.22.1 2023/08/11 13:39:46 martin Exp $"); static krb5_error_code change_entry (krb5_keytab keytab, krb5_principal principal, krb5_kvno kvno, const char *realm, const char *admin_server, int server_port) { krb5_error_code ret; kadm5_config_params conf; void *kadm_handle; char *client_name; krb5_keyblock *keys; int num_keys; int i; ret = krb5_unparse_name (context, principal, &client_name); if (ret) { krb5_warn (context, ret, "krb5_unparse_name"); return ret; } memset (&conf, 0, sizeof(conf)); if(realm == NULL) realm = krb5_principal_get_realm(context, principal); conf.realm = strdup(realm); if (conf.realm == NULL) { free (client_name); krb5_set_error_message(context, ENOMEM, "malloc failed"); return ENOMEM; } conf.mask |= KADM5_CONFIG_REALM; if (admin_server) { conf.admin_server = strdup(admin_server); if (conf.admin_server == NULL) { free(client_name); free(conf.realm); krb5_set_error_message(context, ENOMEM, "malloc failed"); return ENOMEM; } conf.mask |= KADM5_CONFIG_ADMIN_SERVER; } if (server_port) { conf.kadmind_port = htons(server_port); conf.mask |= KADM5_CONFIG_KADMIND_PORT; } ret = kadm5_init_with_skey_ctx (context, client_name, keytab_string, KADM5_ADMIN_SERVICE, &conf, 0, 0, &kadm_handle); free(conf.admin_server); free(conf.realm); if (ret) { krb5_warn (context, ret, "kadm5_c_init_with_skey_ctx: %s:", client_name); free (client_name); return ret; } ret = kadm5_randkey_principal (kadm_handle, principal, &keys, &num_keys); kadm5_destroy (kadm_handle); if (ret) { krb5_warn(context, ret, "kadm5_randkey_principal: %s:", client_name); free (client_name); return ret; } free (client_name); for (i = 0; i < num_keys; ++i) { krb5_keytab_entry new_entry; new_entry.principal = principal; new_entry.timestamp = time (NULL); new_entry.vno = kvno + 1; new_entry.keyblock = keys[i]; ret = krb5_kt_add_entry (context, keytab, &new_entry); if (ret) krb5_warn (context, ret, "krb5_kt_add_entry"); krb5_free_keyblock_contents (context, &keys[i]); } return ret; } /* * loop over all the entries in the keytab (or those given) and change * their keys, writing the new keys */ struct change_set { krb5_principal principal; krb5_kvno kvno; }; int kt_change (struct change_options *opt, int argc, char **argv) { krb5_error_code ret; krb5_keytab keytab; krb5_kt_cursor cursor; krb5_keytab_entry entry; int i, j, max; struct change_set *changeset; int errors = 0; if((keytab = ktutil_open_keytab()) == NULL) return 1; j = 0; max = 0; changeset = NULL; ret = krb5_kt_start_seq_get(context, keytab, &cursor); if(ret){ krb5_warn(context, ret, "%s", keytab_string); goto out; } while((ret = krb5_kt_next_entry(context, keytab, &entry, &cursor)) == 0) { int add = 0; for (i = 0; i < j; ++i) { if (krb5_principal_compare (context, changeset[i].principal, entry.principal)) { if (changeset[i].kvno < entry.vno) changeset[i].kvno = entry.vno; break; } } if (i < j) { krb5_kt_free_entry (context, &entry); continue; } if (argc == 0) { add = 1; } else { for (i = 0; i < argc; ++i) { krb5_principal princ; ret = krb5_parse_name (context, argv[i], &princ); if (ret) { krb5_warn (context, ret, "%s", argv[i]); continue; } if (krb5_principal_compare (context, princ, entry.principal)) add = 1; krb5_free_principal (context, princ); } } if (add) { if (j >= max) { void *tmp; max = max(max * 2, 1); tmp = realloc (changeset, max * sizeof(*changeset)); if (tmp == NULL) { krb5_kt_free_entry (context, &entry); krb5_warnx (context, "realloc: out of memory"); ret = ENOMEM; break; } changeset = tmp; } ret = krb5_copy_principal (context, entry.principal, &changeset[j].principal); if (ret) { krb5_warn (context, ret, "krb5_copy_principal"); krb5_kt_free_entry (context, &entry); break; } changeset[j].kvno = entry.vno; ++j; } krb5_kt_free_entry (context, &entry); } krb5_kt_end_seq_get(context, keytab, &cursor); if (ret == KRB5_KT_END) { for (i = 0; i < j; i++) { if (verbose_flag) { char *client_name; ret = krb5_unparse_name (context, changeset[i].principal, &client_name); if (ret) { krb5_warn (context, ret, "krb5_unparse_name"); } else { printf("Changing %s kvno %d\n", client_name, changeset[i].kvno); free(client_name); } } ret = change_entry (keytab, changeset[i].principal, changeset[i].kvno, opt->realm_string, opt->admin_server_string, opt->server_port_integer); if (ret != 0) errors = 1; } } else errors = 1; for (i = 0; i < j; i++) krb5_free_principal (context, changeset[i].principal); free (changeset); out: krb5_kt_close(context, keytab); return errors; }