1 /* $NetBSD: kpasswd.c,v 1.1.1.1 2011/04/13 18:14:38 elric Exp $ */ 2 3 /* 4 * Copyright (c) 1997-2004 Kungliga Tekniska Högskolan 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 1.1.1.1 2011/04/13 18:14:38 elric 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 }, 46 { "cache", 'c', arg_string, &cred_cache_str }, 47 { "version", 0, arg_flag, &version_flag }, 48 { "help", 0, arg_flag, &help_flag } 49 }; 50 51 static void 52 usage (int ret, struct getargs *a, int num_args) 53 { 54 arg_printusage (a, num_args, NULL, "[principal ...]"); 55 exit (ret); 56 } 57 58 static int 59 change_password(krb5_context context, 60 krb5_principal principal, 61 krb5_ccache id) 62 { 63 krb5_data result_code_string, result_string; 64 int result_code; 65 krb5_error_code ret; 66 char pwbuf[BUFSIZ]; 67 char *msg, *name; 68 69 krb5_data_zero (&result_code_string); 70 krb5_data_zero (&result_string); 71 72 name = msg = NULL; 73 if (principal == NULL) 74 asprintf(&msg, "New password: "); 75 else { 76 ret = krb5_unparse_name(context, principal, &name); 77 if (ret) 78 krb5_err(context, 1, ret, "krb5_unparse_name"); 79 80 asprintf(&msg, "New password for %s: ", name); 81 } 82 83 if (msg == NULL) 84 krb5_errx (context, 1, "out of memory"); 85 86 ret = UI_UTIL_read_pw_string (pwbuf, sizeof(pwbuf), msg, 1); 87 free(msg); 88 if (name) 89 free(name); 90 if (ret != 0) { 91 return 1; 92 } 93 94 ret = krb5_set_password_using_ccache (context, id, pwbuf, 95 principal, 96 &result_code, 97 &result_code_string, 98 &result_string); 99 if (ret) { 100 krb5_warn (context, ret, "krb5_set_password_using_ccache"); 101 return 1; 102 } 103 104 printf ("%s%s%.*s\n", krb5_passwd_result_to_string(context, result_code), 105 result_string.length > 0 ? " : " : "", 106 (int)result_string.length, 107 result_string.length > 0 ? (char *)result_string.data : ""); 108 109 krb5_data_free (&result_code_string); 110 krb5_data_free (&result_string); 111 112 return ret != 0; 113 } 114 115 116 int 117 main (int argc, char **argv) 118 { 119 krb5_error_code ret; 120 krb5_context context; 121 krb5_principal principal; 122 krb5_get_init_creds_opt *opt; 123 krb5_ccache id = NULL; 124 int exit_value; 125 int optidx = 0; 126 127 setprogname(argv[0]); 128 129 if(getarg(args, sizeof(args) / sizeof(args[0]), argc, argv, &optidx)) 130 usage(1, args, sizeof(args) / sizeof(args[0])); 131 if (help_flag) 132 usage(0, args, sizeof(args) / sizeof(args[0])); 133 if (version_flag) { 134 print_version(NULL); 135 return 0; 136 } 137 argc -= optidx; 138 argv += optidx; 139 140 ret = krb5_init_context (&context); 141 if (ret) 142 errx (1, "krb5_init_context failed: %d", ret); 143 144 ret = krb5_get_init_creds_opt_alloc (context, &opt); 145 if (ret) 146 krb5_err(context, 1, ret, "krb5_get_init_creds_opt_alloc"); 147 148 krb5_get_init_creds_opt_set_tkt_life (opt, 300); 149 krb5_get_init_creds_opt_set_forwardable (opt, FALSE); 150 krb5_get_init_creds_opt_set_proxiable (opt, FALSE); 151 152 if (cred_cache_str) { 153 ret = krb5_cc_resolve(context, cred_cache_str, &id); 154 if (ret) 155 krb5_err (context, 1, ret, "krb5_cc_resolve"); 156 } else { 157 ret = krb5_cc_new_unique(context, krb5_cc_type_memory, NULL, &id); 158 if (ret) 159 krb5_err (context, 1, ret, "krb5_cc_new_unique"); 160 } 161 162 if (cred_cache_str == NULL) { 163 krb5_principal admin_principal = NULL; 164 krb5_creds cred; 165 166 if (admin_principal_str) { 167 ret = krb5_parse_name (context, admin_principal_str, 168 &admin_principal); 169 if (ret) 170 krb5_err (context, 1, ret, "krb5_parse_name"); 171 } else if (argc == 1) { 172 ret = krb5_parse_name (context, argv[0], &admin_principal); 173 if (ret) 174 krb5_err (context, 1, ret, "krb5_parse_name"); 175 } else { 176 ret = krb5_get_default_principal (context, &admin_principal); 177 if (ret) 178 krb5_err (context, 1, ret, "krb5_get_default_principal"); 179 } 180 181 ret = krb5_get_init_creds_password (context, 182 &cred, 183 admin_principal, 184 NULL, 185 krb5_prompter_posix, 186 NULL, 187 0, 188 "kadmin/changepw", 189 opt); 190 switch (ret) { 191 case 0: 192 break; 193 case KRB5_LIBOS_PWDINTR : 194 return 1; 195 case KRB5KRB_AP_ERR_BAD_INTEGRITY : 196 case KRB5KRB_AP_ERR_MODIFIED : 197 krb5_errx(context, 1, "Password incorrect"); 198 break; 199 default: 200 krb5_err(context, 1, ret, "krb5_get_init_creds"); 201 } 202 203 krb5_get_init_creds_opt_free(context, opt); 204 205 ret = krb5_cc_initialize(context, id, admin_principal); 206 krb5_free_principal(context, admin_principal); 207 if (ret) 208 krb5_err(context, 1, ret, "krb5_cc_initialize"); 209 210 ret = krb5_cc_store_cred(context, id, &cred); 211 if (ret) 212 krb5_err(context, 1, ret, "krb5_cc_store_cred"); 213 214 krb5_free_cred_contents (context, &cred); 215 } 216 217 if (argc == 0) { 218 exit_value = change_password(context, NULL, id); 219 } else { 220 exit_value = 0; 221 222 while (argc-- > 0) { 223 224 ret = krb5_parse_name (context, argv[0], &principal); 225 if (ret) 226 krb5_err (context, 1, ret, "krb5_parse_name"); 227 228 ret = change_password(context, principal, id); 229 if (ret) 230 exit_value = 1; 231 krb5_free_principal(context, principal); 232 argv++; 233 } 234 } 235 236 if (cred_cache_str == NULL) { 237 ret = krb5_cc_destroy(context, id); 238 if (ret) 239 krb5_err (context, 1, ret, "krb5_cc_destroy"); 240 } else { 241 ret = krb5_cc_close(context, id); 242 if (ret) 243 krb5_err (context, 1, ret, "krb5_cc_close"); 244 } 245 246 krb5_free_context (context); 247 return exit_value; 248 } 249