1 /* $NetBSD: kpasswd.c,v 1.1.1.2 2014/04/24 12:45:28 pettai 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"); 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 70 krb5_data_zero (&result_code_string); 71 krb5_data_zero (&result_string); 72 73 name = msg = NULL; 74 if (principal == NULL) 75 asprintf(&msg, "New password: "); 76 else { 77 ret = krb5_unparse_name(context, principal, &name); 78 if (ret) 79 krb5_err(context, 1, ret, "krb5_unparse_name"); 80 81 asprintf(&msg, "New password for %s: ", name); 82 } 83 84 if (msg == NULL) 85 krb5_errx (context, 1, "out of memory"); 86 87 ret = UI_UTIL_read_pw_string (pwbuf, sizeof(pwbuf), msg, 1); 88 free(msg); 89 if (name) 90 free(name); 91 if (ret != 0) { 92 return 1; 93 } 94 95 ret = krb5_set_password_using_ccache (context, id, pwbuf, 96 principal, 97 &result_code, 98 &result_code_string, 99 &result_string); 100 if (ret) { 101 krb5_warn (context, ret, "krb5_set_password_using_ccache"); 102 return 1; 103 } 104 105 printf ("%s%s%.*s\n", krb5_passwd_result_to_string(context, result_code), 106 result_string.length > 0 ? " : " : "", 107 (int)result_string.length, 108 result_string.length > 0 ? (char *)result_string.data : ""); 109 110 krb5_data_free (&result_code_string); 111 krb5_data_free (&result_string); 112 113 return ret != 0; 114 } 115 116 117 int 118 main (int argc, char **argv) 119 { 120 krb5_error_code ret; 121 krb5_context context; 122 krb5_principal principal; 123 krb5_get_init_creds_opt *opt; 124 krb5_ccache id = NULL; 125 int exit_value; 126 int optidx = 0; 127 128 setprogname(argv[0]); 129 130 if(getarg(args, sizeof(args) / sizeof(args[0]), argc, argv, &optidx)) 131 usage(1, args, sizeof(args) / sizeof(args[0])); 132 if (help_flag) 133 usage(0, args, sizeof(args) / sizeof(args[0])); 134 if (version_flag) { 135 print_version(NULL); 136 return 0; 137 } 138 argc -= optidx; 139 argv += optidx; 140 141 ret = krb5_init_context (&context); 142 if (ret) 143 errx (1, "krb5_init_context failed: %d", ret); 144 145 ret = krb5_get_init_creds_opt_alloc (context, &opt); 146 if (ret) 147 krb5_err(context, 1, ret, "krb5_get_init_creds_opt_alloc"); 148 149 krb5_get_init_creds_opt_set_tkt_life (opt, 300); 150 krb5_get_init_creds_opt_set_forwardable (opt, FALSE); 151 krb5_get_init_creds_opt_set_proxiable (opt, FALSE); 152 153 if (cred_cache_str) { 154 ret = krb5_cc_resolve(context, cred_cache_str, &id); 155 if (ret) 156 krb5_err (context, 1, ret, "krb5_cc_resolve"); 157 } else { 158 ret = krb5_cc_new_unique(context, krb5_cc_type_memory, NULL, &id); 159 if (ret) 160 krb5_err (context, 1, ret, "krb5_cc_new_unique"); 161 } 162 163 if (cred_cache_str == NULL) { 164 krb5_principal admin_principal = NULL; 165 krb5_creds cred; 166 167 if (admin_principal_str) { 168 ret = krb5_parse_name (context, admin_principal_str, 169 &admin_principal); 170 if (ret) 171 krb5_err (context, 1, ret, "krb5_parse_name"); 172 } else if (argc == 1) { 173 ret = krb5_parse_name (context, argv[0], &admin_principal); 174 if (ret) 175 krb5_err (context, 1, ret, "krb5_parse_name"); 176 } else { 177 ret = krb5_get_default_principal (context, &admin_principal); 178 if (ret) 179 krb5_err (context, 1, ret, "krb5_get_default_principal"); 180 } 181 182 ret = krb5_get_init_creds_password (context, 183 &cred, 184 admin_principal, 185 NULL, 186 krb5_prompter_posix, 187 NULL, 188 0, 189 "kadmin/changepw", 190 opt); 191 switch (ret) { 192 case 0: 193 break; 194 case KRB5_LIBOS_PWDINTR : 195 return 1; 196 case KRB5KRB_AP_ERR_BAD_INTEGRITY : 197 case KRB5KRB_AP_ERR_MODIFIED : 198 krb5_errx(context, 1, "Password incorrect"); 199 break; 200 default: 201 krb5_err(context, 1, ret, "krb5_get_init_creds"); 202 } 203 204 krb5_get_init_creds_opt_free(context, opt); 205 206 ret = krb5_cc_initialize(context, id, admin_principal); 207 krb5_free_principal(context, admin_principal); 208 if (ret) 209 krb5_err(context, 1, ret, "krb5_cc_initialize"); 210 211 ret = krb5_cc_store_cred(context, id, &cred); 212 if (ret) 213 krb5_err(context, 1, ret, "krb5_cc_store_cred"); 214 215 krb5_free_cred_contents (context, &cred); 216 } 217 218 if (argc == 0) { 219 exit_value = change_password(context, NULL, id); 220 } else { 221 exit_value = 0; 222 223 while (argc-- > 0) { 224 225 ret = krb5_parse_name (context, argv[0], &principal); 226 if (ret) 227 krb5_err (context, 1, ret, "krb5_parse_name"); 228 229 ret = change_password(context, principal, id); 230 if (ret) 231 exit_value = 1; 232 krb5_free_principal(context, principal); 233 argv++; 234 } 235 } 236 237 if (cred_cache_str == NULL) { 238 ret = krb5_cc_destroy(context, id); 239 if (ret) 240 krb5_err (context, 1, ret, "krb5_cc_destroy"); 241 } else { 242 ret = krb5_cc_close(context, id); 243 if (ret) 244 krb5_err (context, 1, ret, "krb5_cc_close"); 245 } 246 247 krb5_free_context (context); 248 return exit_value; 249 } 250