/* $NetBSD: kpasswd.c,v 1.2.22.1 2023/08/11 13:39:56 martin Exp $ */ /* * Copyright (c) 1997-2004 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 "kpasswd_locl.h" __RCSID("$NetBSD: kpasswd.c,v 1.2.22.1 2023/08/11 13:39:56 martin Exp $"); static int version_flag; static int help_flag; static char *admin_principal_str; static char *cred_cache_str; static struct getargs args[] = { { "admin-principal", 0, arg_string, &admin_principal_str, NULL, NULL }, { "cache", 'c', arg_string, &cred_cache_str, NULL, NULL }, { "version", 0, arg_flag, &version_flag, NULL, NULL }, { "help", 0, arg_flag, &help_flag, NULL, NULL } }; static void usage (int ret, struct getargs *a, int num_args) { arg_printusage (a, num_args, NULL, "[principal ...]"); exit (ret); } static int change_password(krb5_context context, krb5_principal principal, krb5_ccache id) { krb5_data result_code_string, result_string; int result_code; krb5_error_code ret; char pwbuf[BUFSIZ]; char *msg, *name; int aret; krb5_data_zero (&result_code_string); krb5_data_zero (&result_string); name = msg = NULL; if (principal == NULL) aret = asprintf(&msg, "New password: "); else { ret = krb5_unparse_name(context, principal, &name); if (ret) krb5_err(context, 1, ret, "krb5_unparse_name"); aret = asprintf(&msg, "New password for %s: ", name); } if (aret == -1 || msg == NULL) krb5_errx (context, 1, "out of memory"); ret = UI_UTIL_read_pw_string (pwbuf, sizeof(pwbuf), msg, UI_UTIL_FLAG_VERIFY); free(msg); if (name) free(name); if (ret != 0) { return 1; } ret = krb5_set_password_using_ccache (context, id, pwbuf, principal, &result_code, &result_code_string, &result_string); if (ret) { krb5_warn (context, ret, "krb5_set_password_using_ccache"); return 1; } printf ("%s%s%.*s\n", krb5_passwd_result_to_string(context, result_code), result_string.length > 0 ? " : " : "", (int)result_string.length, result_string.length > 0 ? (char *)result_string.data : ""); krb5_data_free (&result_code_string); krb5_data_free (&result_string); return ret != 0; } int main (int argc, char **argv) { krb5_error_code ret; krb5_context context; krb5_principal principal; krb5_get_init_creds_opt *opt; krb5_ccache id = NULL; int exit_value; int optidx = 0; setprogname(argv[0]); if(getarg(args, sizeof(args) / sizeof(args[0]), argc, argv, &optidx)) usage(1, args, sizeof(args) / sizeof(args[0])); if (help_flag) usage(0, args, sizeof(args) / sizeof(args[0])); if (version_flag) { print_version(NULL); return 0; } argc -= optidx; argv += optidx; ret = krb5_init_context (&context); if (ret) errx (1, "krb5_init_context failed: %d", ret); ret = krb5_get_init_creds_opt_alloc (context, &opt); if (ret) krb5_err(context, 1, ret, "krb5_get_init_creds_opt_alloc"); krb5_get_init_creds_opt_set_tkt_life (opt, 300); krb5_get_init_creds_opt_set_forwardable (opt, FALSE); krb5_get_init_creds_opt_set_proxiable (opt, FALSE); if (cred_cache_str) { ret = krb5_cc_resolve(context, cred_cache_str, &id); if (ret) krb5_err (context, 1, ret, "krb5_cc_resolve"); } else { ret = krb5_cc_new_unique(context, krb5_cc_type_memory, NULL, &id); if (ret) krb5_err (context, 1, ret, "krb5_cc_new_unique"); } if (cred_cache_str == NULL) { krb5_principal admin_principal = NULL; krb5_creds cred; if (admin_principal_str) { ret = krb5_parse_name (context, admin_principal_str, &admin_principal); if (ret) krb5_err (context, 1, ret, "krb5_parse_name"); } else if (argc == 1) { ret = krb5_parse_name (context, argv[0], &admin_principal); if (ret) krb5_err (context, 1, ret, "krb5_parse_name"); } else { ret = krb5_get_default_principal (context, &admin_principal); if (ret) krb5_err (context, 1, ret, "krb5_get_default_principal"); } ret = krb5_get_init_creds_password (context, &cred, admin_principal, NULL, krb5_prompter_posix, NULL, 0, "kadmin/changepw", opt); switch (ret) { case 0: break; case KRB5_LIBOS_PWDINTR : return 1; case KRB5KRB_AP_ERR_BAD_INTEGRITY : case KRB5KRB_AP_ERR_MODIFIED : krb5_errx(context, 1, "Password incorrect"); break; default: krb5_err(context, 1, ret, "krb5_get_init_creds"); } krb5_get_init_creds_opt_free(context, opt); ret = krb5_cc_initialize(context, id, admin_principal); krb5_free_principal(context, admin_principal); if (ret) krb5_err(context, 1, ret, "krb5_cc_initialize"); ret = krb5_cc_store_cred(context, id, &cred); if (ret) krb5_err(context, 1, ret, "krb5_cc_store_cred"); krb5_free_cred_contents (context, &cred); } if (argc == 0) { exit_value = change_password(context, NULL, id); } else { exit_value = 0; while (argc-- > 0) { ret = krb5_parse_name (context, argv[0], &principal); if (ret) krb5_err (context, 1, ret, "krb5_parse_name"); ret = change_password(context, principal, id); if (ret) exit_value = 1; krb5_free_principal(context, principal); argv++; } } if (cred_cache_str == NULL) { ret = krb5_cc_destroy(context, id); if (ret) krb5_err (context, 1, ret, "krb5_cc_destroy"); } else { ret = krb5_cc_close(context, id); if (ret) krb5_err (context, 1, ret, "krb5_cc_close"); } krb5_free_context (context); return exit_value; }