1 /* $NetBSD: kpasswd.c,v 1.3 2023/06/19 21:41:42 christos Exp $ */ 2 3 /* 4 * Copyright (c) 1997-2004 Kungliga Tekniska Hgskolan 5 * (Royal Institute of Technology, Stockholm, Sweden). 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * 3. Neither the name of the Institute nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include "kpasswd_locl.h" 37 __RCSID("$NetBSD: kpasswd.c,v 1.3 2023/06/19 21:41:42 christos Exp $"); 38 39 static int version_flag; 40 static int help_flag; 41 static char *admin_principal_str; 42 static char *cred_cache_str; 43 44 static struct getargs args[] = { 45 { "admin-principal", 0, arg_string, &admin_principal_str, NULL, 46 NULL }, 47 { "cache", 'c', arg_string, &cred_cache_str, NULL, NULL }, 48 { "version", 0, arg_flag, &version_flag, NULL, NULL }, 49 { "help", 0, arg_flag, &help_flag, NULL, NULL } 50 }; 51 52 static void 53 usage (int ret, struct getargs *a, int num_args) 54 { 55 arg_printusage (a, num_args, NULL, "[principal ...]"); 56 exit (ret); 57 } 58 59 static int 60 change_password(krb5_context context, 61 krb5_principal principal, 62 krb5_ccache id) 63 { 64 krb5_data result_code_string, result_string; 65 int result_code; 66 krb5_error_code ret; 67 char pwbuf[BUFSIZ]; 68 char *msg, *name; 69 int aret; 70 71 krb5_data_zero (&result_code_string); 72 krb5_data_zero (&result_string); 73 74 name = msg = NULL; 75 if (principal == NULL) 76 aret = asprintf(&msg, "New password: "); 77 else { 78 ret = krb5_unparse_name(context, principal, &name); 79 if (ret) 80 krb5_err(context, 1, ret, "krb5_unparse_name"); 81 82 aret = asprintf(&msg, "New password for %s: ", name); 83 } 84 85 if (aret == -1 || msg == NULL) 86 krb5_errx (context, 1, "out of memory"); 87 88 ret = UI_UTIL_read_pw_string (pwbuf, sizeof(pwbuf), msg, 89 UI_UTIL_FLAG_VERIFY); 90 free(msg); 91 if (name) 92 free(name); 93 if (ret != 0) { 94 return 1; 95 } 96 97 ret = krb5_set_password_using_ccache (context, id, pwbuf, 98 principal, 99 &result_code, 100 &result_code_string, 101 &result_string); 102 if (ret) { 103 krb5_warn (context, ret, "krb5_set_password_using_ccache"); 104 return 1; 105 } 106 107 printf ("%s%s%.*s\n", krb5_passwd_result_to_string(context, result_code), 108 result_string.length > 0 ? " : " : "", 109 (int)result_string.length, 110 result_string.length > 0 ? (char *)result_string.data : ""); 111 112 krb5_data_free (&result_code_string); 113 krb5_data_free (&result_string); 114 115 return ret != 0; 116 } 117 118 119 int 120 main (int argc, char **argv) 121 { 122 krb5_error_code ret; 123 krb5_context context; 124 krb5_principal principal; 125 krb5_get_init_creds_opt *opt; 126 krb5_ccache id = NULL; 127 int exit_value; 128 int optidx = 0; 129 130 setprogname(argv[0]); 131 132 if(getarg(args, sizeof(args) / sizeof(args[0]), argc, argv, &optidx)) 133 usage(1, args, sizeof(args) / sizeof(args[0])); 134 if (help_flag) 135 usage(0, args, sizeof(args) / sizeof(args[0])); 136 if (version_flag) { 137 print_version(NULL); 138 return 0; 139 } 140 argc -= optidx; 141 argv += optidx; 142 143 ret = krb5_init_context (&context); 144 if (ret) 145 errx (1, "krb5_init_context failed: %d", ret); 146 147 ret = krb5_get_init_creds_opt_alloc (context, &opt); 148 if (ret) 149 krb5_err(context, 1, ret, "krb5_get_init_creds_opt_alloc"); 150 151 krb5_get_init_creds_opt_set_tkt_life (opt, 300); 152 krb5_get_init_creds_opt_set_forwardable (opt, FALSE); 153 krb5_get_init_creds_opt_set_proxiable (opt, FALSE); 154 155 if (cred_cache_str) { 156 ret = krb5_cc_resolve(context, cred_cache_str, &id); 157 if (ret) 158 krb5_err (context, 1, ret, "krb5_cc_resolve"); 159 } else { 160 ret = krb5_cc_new_unique(context, krb5_cc_type_memory, NULL, &id); 161 if (ret) 162 krb5_err (context, 1, ret, "krb5_cc_new_unique"); 163 } 164 165 if (cred_cache_str == NULL) { 166 krb5_principal admin_principal = NULL; 167 krb5_creds cred; 168 169 if (admin_principal_str) { 170 ret = krb5_parse_name (context, admin_principal_str, 171 &admin_principal); 172 if (ret) 173 krb5_err (context, 1, ret, "krb5_parse_name"); 174 } else if (argc == 1) { 175 ret = krb5_parse_name (context, argv[0], &admin_principal); 176 if (ret) 177 krb5_err (context, 1, ret, "krb5_parse_name"); 178 } else { 179 ret = krb5_get_default_principal (context, &admin_principal); 180 if (ret) 181 krb5_err (context, 1, ret, "krb5_get_default_principal"); 182 } 183 184 ret = krb5_get_init_creds_password (context, 185 &cred, 186 admin_principal, 187 NULL, 188 krb5_prompter_posix, 189 NULL, 190 0, 191 "kadmin/changepw", 192 opt); 193 switch (ret) { 194 case 0: 195 break; 196 case KRB5_LIBOS_PWDINTR : 197 return 1; 198 case KRB5KRB_AP_ERR_BAD_INTEGRITY : 199 case KRB5KRB_AP_ERR_MODIFIED : 200 krb5_errx(context, 1, "Password incorrect"); 201 break; 202 default: 203 krb5_err(context, 1, ret, "krb5_get_init_creds"); 204 } 205 206 krb5_get_init_creds_opt_free(context, opt); 207 208 ret = krb5_cc_initialize(context, id, admin_principal); 209 krb5_free_principal(context, admin_principal); 210 if (ret) 211 krb5_err(context, 1, ret, "krb5_cc_initialize"); 212 213 ret = krb5_cc_store_cred(context, id, &cred); 214 if (ret) 215 krb5_err(context, 1, ret, "krb5_cc_store_cred"); 216 217 krb5_free_cred_contents (context, &cred); 218 } 219 220 if (argc == 0) { 221 exit_value = change_password(context, NULL, id); 222 } else { 223 exit_value = 0; 224 225 while (argc-- > 0) { 226 227 ret = krb5_parse_name (context, argv[0], &principal); 228 if (ret) 229 krb5_err (context, 1, ret, "krb5_parse_name"); 230 231 ret = change_password(context, principal, id); 232 if (ret) 233 exit_value = 1; 234 krb5_free_principal(context, principal); 235 argv++; 236 } 237 } 238 239 if (cred_cache_str == NULL) { 240 ret = krb5_cc_destroy(context, id); 241 if (ret) 242 krb5_err (context, 1, ret, "krb5_cc_destroy"); 243 } else { 244 ret = krb5_cc_close(context, id); 245 if (ret) 246 krb5_err (context, 1, ret, "krb5_cc_close"); 247 } 248 249 krb5_free_context (context); 250 return exit_value; 251 } 252
Indexes created Sat Feb 28 05:31:39 UTC 2026