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* Copyright (c) 1997-2004 Kungliga Tekniska Högskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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#include "kpasswd_locl.h"
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static int version_flag;
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static char *admin_principal_str;
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static char *cred_cache_str;
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static struct getargs args[] = {
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{ "admin-principal", 0, arg_string, &admin_principal_str },
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{ "cache", 'c', arg_string, &cred_cache_str },
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{ "version", 0, arg_flag, &version_flag },
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{ "help", 0, arg_flag, &help_flag }
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usage (int ret, struct getargs *a, int num_args)
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arg_printusage (a, num_args, NULL, "[principal ...]");
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change_password(krb5_context context,
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krb5_principal principal,
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krb5_data result_code_string, result_string;
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krb5_data_zero (&result_code_string);
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krb5_data_zero (&result_string);
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if (principal == NULL)
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asprintf(&msg, "New password: ");
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ret = krb5_unparse_name(context, principal, &name);
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krb5_err(context, 1, ret, "krb5_unparse_name");
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asprintf(&msg, "New password for %s: ", name);
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krb5_errx (context, 1, "out of memory");
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ret = UI_UTIL_read_pw_string (pwbuf, sizeof(pwbuf), msg, 1);
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ret = krb5_set_password_using_ccache (context, id, pwbuf,
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krb5_warn (context, ret, "krb5_set_password_using_ccache");
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printf ("%s%s%.*s\n", krb5_passwd_result_to_string(context, result_code),
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result_string.length > 0 ? " : " : "",
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(int)result_string.length,
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result_string.length > 0 ? (char *)result_string.data : "");
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krb5_data_free (&result_code_string);
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krb5_data_free (&result_string);
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main (int argc, char **argv)
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krb5_context context;
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krb5_principal principal;
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krb5_get_init_creds_opt *opt;
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krb5_ccache id = NULL;
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optind = krb5_program_setup(&context, argc, argv,
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args, sizeof(args) / sizeof(args[0]), usage);
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usage (0, args, sizeof(args) / sizeof(args[0]));
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print_version (NULL);
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ret = krb5_init_context (&context);
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errx (1, "krb5_init_context failed: %d", ret);
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ret = krb5_get_init_creds_opt_alloc (context, &opt);
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krb5_err(context, 1, ret, "krb5_get_init_creds_opt_alloc");
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krb5_get_init_creds_opt_set_tkt_life (opt, 300);
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krb5_get_init_creds_opt_set_forwardable (opt, FALSE);
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krb5_get_init_creds_opt_set_proxiable (opt, FALSE);
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if (cred_cache_str) {
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ret = krb5_cc_resolve(context, cred_cache_str, &id);
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krb5_err (context, 1, ret, "krb5_cc_resolve");
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ret = krb5_cc_gen_new(context, &krb5_mcc_ops, &id);
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krb5_err (context, 1, ret, "krb5_cc_gen_new");
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if (cred_cache_str == NULL) {
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krb5_principal admin_principal = NULL;
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if (admin_principal_str) {
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ret = krb5_parse_name (context, admin_principal_str,
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krb5_err (context, 1, ret, "krb5_parse_name");
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} else if (argc == 1) {
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ret = krb5_parse_name (context, argv[0], &admin_principal);
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krb5_err (context, 1, ret, "krb5_parse_name");
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ret = krb5_get_default_principal (context, &admin_principal);
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krb5_err (context, 1, ret, "krb5_get_default_principal");
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ret = krb5_get_init_creds_password (context,
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case KRB5_LIBOS_PWDINTR :
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case KRB5KRB_AP_ERR_BAD_INTEGRITY :
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case KRB5KRB_AP_ERR_MODIFIED :
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krb5_errx(context, 1, "Password incorrect");
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krb5_err(context, 1, ret, "krb5_get_init_creds");
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krb5_get_init_creds_opt_free(context, opt);
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ret = krb5_cc_initialize(context, id, admin_principal);
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krb5_free_principal(context, admin_principal);
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krb5_err(context, 1, ret, "krb5_cc_initialize");
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ret = krb5_cc_store_cred(context, id, &cred);
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krb5_err(context, 1, ret, "krb5_cc_store_cred");
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krb5_free_cred_contents (context, &cred);
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exit_value = change_password(context, NULL, id);
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ret = krb5_parse_name (context, argv[0], &principal);
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krb5_err (context, 1, ret, "krb5_parse_name");
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ret = change_password(context, principal, id);
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krb5_free_principal(context, principal);
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if (cred_cache_str == NULL) {
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ret = krb5_cc_destroy(context, id);
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krb5_err (context, 1, ret, "krb5_cc_destroy");
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ret = krb5_cc_close(context, id);
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krb5_err (context, 1, ret, "krb5_cc_close");
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krb5_free_context (context);