1 /* 2 * Copyright (c) 1997-2004 Kungliga Tekniska H�gskolan 3 * (Royal Institute of Technology, Stockholm, Sweden). 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * 3. Neither the name of the Institute nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #include "kpasswd_locl.h" 35 RCSID("$Id: kpasswd.c 19078 2006-11-20 18:12:41Z lha $"); 36 37 static int version_flag; 38 static int help_flag; 39 static char *admin_principal_str; 40 static char *cred_cache_str; 41 42 static struct getargs args[] = { 43 { "admin-principal", 0, arg_string, &admin_principal_str }, 44 { "cache", 'c', arg_string, &cred_cache_str }, 45 { "version", 0, arg_flag, &version_flag }, 46 { "help", 0, arg_flag, &help_flag } 47 }; 48 49 static void 50 usage (int ret, struct getargs *a, int num_args) 51 { 52 arg_printusage (a, num_args, NULL, "[principal ...]"); 53 exit (ret); 54 } 55 56 static int 57 change_password(krb5_context context, 58 krb5_principal principal, 59 krb5_ccache id) 60 { 61 krb5_data result_code_string, result_string; 62 int result_code; 63 krb5_error_code ret; 64 char pwbuf[BUFSIZ]; 65 char *msg, *name; 66 67 krb5_data_zero (&result_code_string); 68 krb5_data_zero (&result_string); 69 70 name = msg = NULL; 71 if (principal == NULL) 72 asprintf(&msg, "New password: "); 73 else { 74 ret = krb5_unparse_name(context, principal, &name); 75 if (ret) 76 krb5_err(context, 1, ret, "krb5_unparse_name"); 77 78 asprintf(&msg, "New password for %s: ", name); 79 } 80 81 if (msg == NULL) 82 krb5_errx (context, 1, "out of memory"); 83 84 ret = UI_UTIL_read_pw_string (pwbuf, sizeof(pwbuf), msg, 1); 85 free(msg); 86 if (name) 87 free(name); 88 if (ret != 0) { 89 return 1; 90 } 91 92 ret = krb5_set_password_using_ccache (context, id, pwbuf, 93 principal, 94 &result_code, 95 &result_code_string, 96 &result_string); 97 if (ret) { 98 krb5_warn (context, ret, "krb5_set_password_using_ccache"); 99 return 1; 100 } 101 102 printf ("%s%s%.*s\n", krb5_passwd_result_to_string(context, result_code), 103 result_string.length > 0 ? " : " : "", 104 (int)result_string.length, 105 result_string.length > 0 ? (char *)result_string.data : ""); 106 107 krb5_data_free (&result_code_string); 108 krb5_data_free (&result_string); 109 110 return ret != 0; 111 } 112 113 114 int 115 main (int argc, char **argv) 116 { 117 krb5_error_code ret; 118 krb5_context context; 119 krb5_principal principal; 120 int optind = 0; 121 krb5_get_init_creds_opt *opt; 122 krb5_ccache id = NULL; 123 int exit_value; 124 125 optind = krb5_program_setup(&context, argc, argv, 126 args, sizeof(args) / sizeof(args[0]), usage); 127 128 if (help_flag) 129 usage (0, args, sizeof(args) / sizeof(args[0])); 130 131 if(version_flag){ 132 print_version (NULL); 133 exit(0); 134 } 135 136 argc -= optind; 137 argv += optind; 138 139 ret = krb5_init_context (&context); 140 if (ret) 141 errx (1, "krb5_init_context failed: %d", ret); 142 143 ret = krb5_get_init_creds_opt_alloc (context, &opt); 144 if (ret) 145 krb5_err(context, 1, ret, "krb5_get_init_creds_opt_alloc"); 146 147 krb5_get_init_creds_opt_set_tkt_life (opt, 300); 148 krb5_get_init_creds_opt_set_forwardable (opt, FALSE); 149 krb5_get_init_creds_opt_set_proxiable (opt, FALSE); 150 151 if (cred_cache_str) { 152 ret = krb5_cc_resolve(context, cred_cache_str, &id); 153 if (ret) 154 krb5_err (context, 1, ret, "krb5_cc_resolve"); 155 } else { 156 ret = krb5_cc_gen_new(context, &krb5_mcc_ops, &id); 157 if (ret) 158 krb5_err (context, 1, ret, "krb5_cc_gen_new"); 159 } 160 161 if (cred_cache_str == NULL) { 162 krb5_principal admin_principal = NULL; 163 krb5_creds cred; 164 165 if (admin_principal_str) { 166 ret = krb5_parse_name (context, admin_principal_str, 167 &admin_principal); 168 if (ret) 169 krb5_err (context, 1, ret, "krb5_parse_name"); 170 } else if (argc == 1) { 171 ret = krb5_parse_name (context, argv[0], &admin_principal); 172 if (ret) 173 krb5_err (context, 1, ret, "krb5_parse_name"); 174 } else { 175 ret = krb5_get_default_principal (context, &admin_principal); 176 if (ret) 177 krb5_err (context, 1, ret, "krb5_get_default_principal"); 178 } 179 180 ret = krb5_get_init_creds_password (context, 181 &cred, 182 admin_principal, 183 NULL, 184 krb5_prompter_posix, 185 NULL, 186 0, 187 "kadmin/changepw", 188 opt); 189 switch (ret) { 190 case 0: 191 break; 192 case KRB5_LIBOS_PWDINTR : 193 return 1; 194 case KRB5KRB_AP_ERR_BAD_INTEGRITY : 195 case KRB5KRB_AP_ERR_MODIFIED : 196 krb5_errx(context, 1, "Password incorrect"); 197 break; 198 default: 199 krb5_err(context, 1, ret, "krb5_get_init_creds"); 200 } 201 202 krb5_get_init_creds_opt_free(context, opt); 203 204 ret = krb5_cc_initialize(context, id, admin_principal); 205 krb5_free_principal(context, admin_principal); 206 if (ret) 207 krb5_err(context, 1, ret, "krb5_cc_initialize"); 208 209 ret = krb5_cc_store_cred(context, id, &cred); 210 if (ret) 211 krb5_err(context, 1, ret, "krb5_cc_store_cred"); 212 213 krb5_free_cred_contents (context, &cred); 214 } 215 216 if (argc == 0) { 217 exit_value = change_password(context, NULL, id); 218 } else { 219 exit_value = 0; 220 221 while (argc-- > 0) { 222 223 ret = krb5_parse_name (context, argv[0], &principal); 224 if (ret) 225 krb5_err (context, 1, ret, "krb5_parse_name"); 226 227 ret = change_password(context, principal, id); 228 if (ret) 229 exit_value = 1; 230 krb5_free_principal(context, principal); 231 argv++; 232 } 233 } 234 235 if (cred_cache_str == NULL) { 236 ret = krb5_cc_destroy(context, id); 237 if (ret) 238 krb5_err (context, 1, ret, "krb5_cc_destroy"); 239 } else { 240 ret = krb5_cc_close(context, id); 241 if (ret) 242 krb5_err (context, 1, ret, "krb5_cc_close"); 243 } 244 245 krb5_free_context (context); 246 return ret; 247 } 248