1 /* 2 * Copyright (c) 1997-2001 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 "hprop.h" 35 36 RCSID("$Id: hpropd.c,v 1.32 2001/02/20 01:44:50 assar Exp $"); 37 38 #ifdef KRB4 39 static des_cblock mkey4; 40 static des_key_schedule msched4; 41 42 static char * 43 time2str(time_t t) 44 { 45 static char buf[128]; 46 strftime(buf, sizeof(buf), "%Y%m%d%H%M", gmtime(&t)); 47 return buf; 48 } 49 50 static int 51 dump_krb4(krb5_context context, hdb_entry *ent, int fd) 52 { 53 char name[ANAME_SZ]; 54 char instance[INST_SZ]; 55 char realm[REALM_SZ]; 56 char buf[1024]; 57 char *p; 58 int i; 59 int ret; 60 char *princ_name; 61 Event *modifier; 62 krb5_realm *realms; 63 int cmp; 64 65 ret = krb5_524_conv_principal(context, ent->principal, 66 name, instance, realm); 67 if (ret) { 68 krb5_unparse_name(context, ent->principal, &princ_name); 69 krb5_warn(context, ret, "%s", princ_name); 70 free(princ_name); 71 return -1; 72 } 73 74 ret = krb5_get_default_realms (context, &realms); 75 if (ret) { 76 krb5_warn(context, ret, "krb5_get_default_realms"); 77 return -1; 78 } 79 80 cmp = strcmp (realms[0], ent->principal->realm); 81 krb5_free_host_realm (context, realms); 82 if (cmp != 0) 83 return -1; 84 85 snprintf (buf, sizeof(buf), "%s %s ", name, 86 (strlen(instance) != 0) ? instance : "*"); 87 88 if (ent->max_life) { 89 asprintf(&p, "%d", krb_time_to_life(0, *ent->max_life)); 90 strcat(buf, p); 91 free(p); 92 } else 93 strcat(buf, "255"); 94 strcat(buf, " "); 95 96 i = 0; 97 while (i < ent->keys.len && 98 ent->keys.val[i].key.keytype != KEYTYPE_DES) 99 ++i; 100 101 if (i == ent->keys.len) { 102 krb5_warnx(context, "No DES key for %s.%s", name, instance); 103 return -1; 104 } 105 106 if (ent->keys.val[i].mkvno) 107 asprintf(&p, "%d ", *ent->keys.val[i].mkvno); 108 else 109 asprintf(&p, "%d ", 1); 110 strcat(buf, p); 111 free(p); 112 113 asprintf(&p, "%d ", ent->kvno); 114 strcat(buf, p); 115 free(p); 116 117 asprintf(&p, "%d ", 0); /* Attributes are always 0*/ 118 strcat(buf, p); 119 free(p); 120 121 { 122 u_int32_t *key = ent->keys.val[i].key.keyvalue.data; 123 kdb_encrypt_key((des_cblock*)key, (des_cblock*)key, 124 &mkey4, msched4, DES_ENCRYPT); 125 asprintf(&p, "%x %x ", (int)htonl(*key), (int)htonl(*(key+1))); 126 strcat(buf, p); 127 free(p); 128 } 129 130 if (ent->valid_end == NULL) 131 strcat(buf, time2str(60*60*24*365*50)); /* no expiration */ 132 else 133 strcat(buf, time2str(*ent->valid_end)); 134 strcat(buf, " "); 135 136 if (ent->modified_by == NULL) 137 modifier = &ent->created_by; 138 else 139 modifier = ent->modified_by; 140 141 ret = krb5_524_conv_principal(context, modifier->principal, 142 name, instance, realm); 143 if (ret) { 144 krb5_unparse_name(context, modifier->principal, &princ_name); 145 krb5_warn(context, ret, "%s", princ_name); 146 free(princ_name); 147 return -1; 148 } 149 asprintf(&p, "%s %s %s\n", time2str(modifier->time), 150 (strlen(name) != 0) ? name : "*", 151 (strlen(instance) != 0) ? instance : "*"); 152 strcat(buf, p); 153 free(p); 154 155 ret = write(fd, buf, strlen(buf)); 156 if (ret == -1) 157 krb5_warnx(context, "write"); 158 return 0; 159 } 160 #endif /* KRB4 */ 161 162 static int inetd_flag = -1; 163 static int help_flag; 164 static int version_flag; 165 static int print_dump; 166 static char *database = HDB_DEFAULT_DB; 167 static int from_stdin; 168 #ifdef KRB4 169 static int v4dump; 170 #endif 171 static char *ktname = NULL; 172 173 struct getargs args[] = { 174 { "database", 'd', arg_string, &database, "database", "file" }, 175 { "stdin", 'n', arg_flag, &from_stdin, "read from stdin" }, 176 { "print", 0, arg_flag, &print_dump, "print dump to stdout" }, 177 { "inetd", 'i', arg_negative_flag, &inetd_flag, 178 "Not started from inetd" }, 179 { "keytab", 'k', arg_string, &ktname, "keytab to use for authentication", "keytab" }, 180 #ifdef KRB4 181 { "v4dump", '4', arg_flag, &v4dump, "create v4 type DB" }, 182 #endif 183 { "version", 0, arg_flag, &version_flag, NULL, NULL }, 184 { "help", 'h', arg_flag, &help_flag, NULL, NULL} 185 }; 186 187 static int num_args = sizeof(args) / sizeof(args[0]); 188 189 static void 190 usage(int ret) 191 { 192 arg_printusage (args, num_args, NULL, ""); 193 exit (ret); 194 } 195 196 int 197 main(int argc, char **argv) 198 { 199 krb5_error_code ret; 200 krb5_context context; 201 krb5_auth_context ac = NULL; 202 krb5_principal c1, c2; 203 krb5_authenticator authent; 204 krb5_keytab keytab; 205 int fd; 206 HDB *db; 207 int optind = 0; 208 char *tmp_db; 209 krb5_log_facility *fac; 210 int nprincs; 211 #ifdef KRB4 212 int e; 213 int fd_out = -1; 214 #endif 215 216 setprogname(argv[0]); 217 218 ret = krb5_init_context(&context); 219 if(ret) 220 exit(1); 221 222 ret = krb5_openlog(context, "hpropd", &fac); 223 if(ret) 224 ; 225 krb5_set_warn_dest(context, fac); 226 227 if(getarg(args, num_args, argc, argv, &optind)) 228 usage(1); 229 230 #ifdef KRB4 231 if (v4dump && database == HDB_DEFAULT_DB) 232 database = "/var/kerberos/524_dump"; 233 #endif /* KRB4 */ 234 235 if(help_flag) 236 usage(0); 237 if(version_flag) { 238 print_version(NULL); 239 exit(0); 240 } 241 242 argc -= optind; 243 argv += optind; 244 245 if (argc != 0) 246 usage(1); 247 248 if(from_stdin) 249 fd = STDIN_FILENO; 250 else { 251 struct sockaddr_storage ss; 252 struct sockaddr *sa = (struct sockaddr *)&ss; 253 socklen_t sin_len = sizeof(ss); 254 char addr_name[256]; 255 krb5_ticket *ticket; 256 char *server; 257 258 fd = STDIN_FILENO; 259 if (inetd_flag == -1) { 260 if (getpeername (fd, sa, &sin_len) < 0) 261 inetd_flag = 0; 262 else 263 inetd_flag = 1; 264 } 265 if (!inetd_flag) { 266 mini_inetd (krb5_getportbyname (context, "hprop", "tcp", 267 HPROP_PORT)); 268 } 269 sin_len = sizeof(ss); 270 if(getpeername(fd, sa, &sin_len) < 0) 271 krb5_err(context, 1, errno, "getpeername"); 272 273 if (inet_ntop(sa->sa_family, 274 socket_get_address (sa), 275 addr_name, 276 sizeof(addr_name)) == NULL) 277 strlcpy (addr_name, "unknown address", 278 sizeof(addr_name)); 279 280 krb5_log(context, fac, 0, "Connection from %s", addr_name); 281 282 ret = krb5_kt_register(context, &hdb_kt_ops); 283 if(ret) 284 krb5_err(context, 1, ret, "krb5_kt_register"); 285 286 if (ktname != NULL) { 287 ret = krb5_kt_resolve(context, ktname, &keytab); 288 if (ret) 289 krb5_err (context, 1, ret, "krb5_kt_resolve %s", ktname); 290 } else { 291 ret = krb5_kt_default (context, &keytab); 292 if (ret) 293 krb5_err (context, 1, ret, "krb5_kt_default"); 294 } 295 296 ret = krb5_recvauth(context, &ac, &fd, HPROP_VERSION, NULL, 297 0, keytab, &ticket); 298 if(ret) 299 krb5_err(context, 1, ret, "krb5_recvauth"); 300 301 ret = krb5_unparse_name(context, ticket->server, &server); 302 if (ret) 303 krb5_err(context, 1, ret, "krb5_unparse_name"); 304 if (strncmp(server, "hprop/", 5) != 0) 305 krb5_errx(context, 1, "ticket not for hprop (%s)", server); 306 307 free(server); 308 krb5_free_ticket (context, ticket); 309 310 ret = krb5_auth_getauthenticator(context, ac, &authent); 311 if(ret) 312 krb5_err(context, 1, ret, "krb5_auth_getauthenticator"); 313 314 ret = krb5_make_principal(context, &c1, NULL, "kadmin", "hprop", NULL); 315 if(ret) 316 krb5_err(context, 1, ret, "krb5_make_principal"); 317 principalname2krb5_principal(&c2, authent->cname, authent->crealm); 318 if(!krb5_principal_compare(context, c1, c2)) { 319 char *s; 320 krb5_unparse_name(context, c2, &s); 321 krb5_errx(context, 1, "Unauthorized connection from %s", s); 322 } 323 krb5_free_principal(context, c1); 324 krb5_free_principal(context, c2); 325 326 ret = krb5_kt_close(context, keytab); 327 if(ret) 328 krb5_err(context, 1, ret, "krb5_kt_close"); 329 } 330 331 if(!print_dump) { 332 asprintf(&tmp_db, "%s~", database); 333 #ifdef KRB4 334 if (v4dump) { 335 fd_out = open(tmp_db, O_WRONLY | O_CREAT | O_TRUNC, 0600); 336 if (fd_out == -1) 337 krb5_errx(context, 1, "%s", strerror(errno)); 338 } 339 else 340 #endif /* KRB4 */ 341 { 342 ret = hdb_create(context, &db, tmp_db); 343 if(ret) 344 krb5_err(context, 1, ret, "hdb_create(%s)", tmp_db); 345 ret = db->open(context, db, O_RDWR | O_CREAT | O_TRUNC, 0600); 346 if(ret) 347 krb5_err(context, 1, ret, "hdb_open(%s)", tmp_db); 348 } 349 } 350 351 #ifdef KRB4 352 if (v4dump) { 353 e = kdb_get_master_key(0, &mkey4, msched4); 354 if(e) 355 krb5_errx(context, 1, "kdb_get_master_key: %s", 356 krb_get_err_text(e)); 357 } 358 #endif /* KRB4 */ 359 360 nprincs = 0; 361 while(1){ 362 krb5_data data; 363 hdb_entry entry; 364 365 if(from_stdin) { 366 ret = krb5_read_message(context, &fd, &data); 367 if(ret != 0 && ret != HEIM_ERR_EOF) 368 krb5_err(context, 1, ret, "krb5_read_message"); 369 } else { 370 ret = krb5_read_priv_message(context, ac, &fd, &data); 371 if(ret) 372 krb5_err(context, 1, ret, "krb5_read_priv_message"); 373 } 374 375 if(ret == HEIM_ERR_EOF || data.length == 0) { 376 if(!from_stdin) { 377 data.data = NULL; 378 data.length = 0; 379 krb5_write_priv_message(context, ac, &fd, &data); 380 } 381 if(!print_dump) { 382 #ifdef KRB4 383 if (v4dump) { 384 ret = rename(tmp_db, database); 385 if (ret) 386 krb5_errx(context, 1, "rename"); 387 ret = close(fd_out); 388 if (ret) 389 krb5_errx(context, 1, "close"); 390 } else 391 #endif /* KRB4 */ 392 { 393 ret = db->rename(context, db, database); 394 if(ret) 395 krb5_err(context, 1, ret, "db_rename"); 396 ret = db->close(context, db); 397 if(ret) 398 krb5_err(context, 1, ret, "db_close"); 399 } 400 } 401 break; 402 } 403 ret = hdb_value2entry(context, &data, &entry); 404 if(ret) 405 krb5_err(context, 1, ret, "hdb_value2entry"); 406 if(print_dump) 407 hdb_print_entry(context, db, &entry, stdout); 408 else { 409 #ifdef KRB4 410 if (v4dump) { 411 ret = dump_krb4(context, &entry, fd_out); 412 if(!ret) nprincs++; 413 } 414 else 415 #endif /* KRB4 */ 416 { 417 ret = db->store(context, db, 0, &entry); 418 if(ret == HDB_ERR_EXISTS) { 419 char *s; 420 krb5_unparse_name(context, entry.principal, &s); 421 krb5_warnx(context, "Entry exists: %s", s); 422 free(s); 423 } else if(ret) 424 krb5_err(context, 1, ret, "db_store"); 425 else 426 nprincs++; 427 } 428 } 429 hdb_free_entry(context, &entry); 430 } 431 if (!print_dump) 432 krb5_log(context, fac, 0, "Received %d principals", nprincs); 433 exit(0); 434 } 435