crypto/external/bsd/heimdal/dist/kdc/hpropd.c

   1 /*      $NetBSD: hpropd.c,v 1.1.1.2 2014/04/24 12:45:27 pettai Exp $    */
   2
   3 /*
   4  * Copyright (c) 1997-2006 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 "hprop.h"
  37
  38 static int inetd_flag = -1;
  39 static int help_flag;
  40 static int version_flag;
  41 static int print_dump;
  42 static const char *database;
  43 static int from_stdin;
  44 static char *local_realm;
  45 static char *ktname = NULL;
  46
  47 struct getargs args[] = {
  48     { "database", 'd', arg_string, rk_UNCONST(&database), "database", "file" },
  49     { "stdin",    'n', arg_flag, &from_stdin, "read from stdin", NULL },
  50     { "print",      0, arg_flag, &print_dump, "print dump to stdout", NULL },
  51 #ifdef SUPPORT_INETD
  52     { "inetd",     'i', arg_negative_flag,      &inetd_flag,
  53       "Not started from inetd", NULL },
  54 #endif
  55     { "keytab",   'k',  arg_string, &ktname,    "keytab to use for authentication", "keytab" },
  56     { "realm",   'r',   arg_string, &local_realm, "realm to use", NULL },
  57     { "version",    0, arg_flag, &version_flag, NULL, NULL },
  58     { "help",    'h',  arg_flag, &help_flag, NULL, NULL}
  59 };
  60
  61 static int num_args = sizeof(args) / sizeof(args[0]);
  62 static char unparseable_name[] = "unparseable name";
  63
  64 static void
  65 usage(int ret)
  66 {
  67     arg_printusage (args, num_args, NULL, "");
  68     exit (ret);
  69 }
  70
  71 int
  72 main(int argc, char **argv)
  73 {
  74     krb5_error_code ret;
  75     krb5_context context;
  76     krb5_auth_context ac = NULL;
  77     krb5_principal c1, c2;
  78     krb5_authenticator authent;
  79     krb5_keytab keytab;
  80     krb5_socket_t sock = rk_INVALID_SOCKET;
  81     HDB *db = NULL;
  82     int optidx = 0;
  83     char *tmp_db;
  84     krb5_log_facility *fac;
  85     int nprincs;
  86
  87     setprogname(argv[0]);
  88
  89     ret = krb5_init_context(&context);
  90     if(ret)
  91         exit(1);
  92
  93     ret = krb5_openlog(context, "hpropd", &fac);
  94     if(ret)
  95         errx(1, "krb5_openlog");
  96     krb5_set_warn_dest(context, fac);
  97
  98     if(getarg(args, num_args, argc, argv, &optidx))
  99         usage(1);
 100
 101     if(local_realm != NULL)
 102         krb5_set_default_realm(context, local_realm);
 103
 104     if(help_flag)
 105         usage(0);
 106     if(version_flag) {
 107         print_version(NULL);
 108         exit(0);
 109     }
 110
 111     argc -= optidx;
 112     argv += optidx;
 113
 114     if (argc != 0)
 115         usage(1);
 116
 117     if (database == NULL)
 118         database = hdb_default_db(context);
 119
 120     if(from_stdin) {
 121         sock = STDIN_FILENO;
 122     } else {
 123         struct sockaddr_storage ss;
 124         struct sockaddr *sa = (struct sockaddr *)&ss;
 125         socklen_t sin_len = sizeof(ss);
 126         char addr_name[256];
 127         krb5_ticket *ticket;
 128         char *server;
 129
 130         sock = STDIN_FILENO;
 131 #ifdef SUPPORT_INETD
 132         if (inetd_flag == -1) {
 133             if (getpeername (sock, sa, &sin_len) < 0) {
 134                 inetd_flag = 0;
 135             } else {
 136                 inetd_flag = 1;
 137             }
 138         }
 139 #else
 140         inetd_flag = 0;
 141 #endif
 142         if (!inetd_flag) {
 143             mini_inetd (krb5_getportbyname (context, "hprop", "tcp",
 144                                             HPROP_PORT), &sock);
 145         }
 146         sin_len = sizeof(ss);
 147         if(getpeername(sock, sa, &sin_len) < 0)
 148             krb5_err(context, 1, errno, "getpeername");
 149
 150         if (inet_ntop(sa->sa_family,
 151                       socket_get_address (sa),
 152                       addr_name,
 153                       sizeof(addr_name)) == NULL)
 154             strlcpy (addr_name, "unknown address",
 155                      sizeof(addr_name));
 156
 157         krb5_log(context, fac, 0, "Connection from %s", addr_name);
 158
 159         ret = krb5_kt_register(context, &hdb_kt_ops);
 160         if(ret)
 161             krb5_err(context, 1, ret, "krb5_kt_register");
 162
 163         if (ktname != NULL) {
 164             ret = krb5_kt_resolve(context, ktname, &keytab);
 165             if (ret)
 166                 krb5_err (context, 1, ret, "krb5_kt_resolve %s", ktname);
 167         } else {
 168             ret = krb5_kt_default (context, &keytab);
 169             if (ret)
 170                 krb5_err (context, 1, ret, "krb5_kt_default");
 171         }
 172
 173         ret = krb5_recvauth(context, &ac, &sock, HPROP_VERSION, NULL,
 174                             0, keytab, &ticket);
 175         if(ret)
 176             krb5_err(context, 1, ret, "krb5_recvauth");
 177
 178         ret = krb5_unparse_name(context, ticket->server, &server);
 179         if (ret)
 180             krb5_err(context, 1, ret, "krb5_unparse_name");
 181         if (strncmp(server, "hprop/", 5) != 0)
 182             krb5_errx(context, 1, "ticket not for hprop (%s)", server);
 183
 184         free(server);
 185         krb5_free_ticket (context, ticket);
 186
 187         ret = krb5_auth_con_getauthenticator(context, ac, &authent);
 188         if(ret)
 189             krb5_err(context, 1, ret, "krb5_auth_con_getauthenticator");
 190
 191         ret = krb5_make_principal(context, &c1, NULL, "kadmin", "hprop", NULL);
 192         if(ret)
 193             krb5_err(context, 1, ret, "krb5_make_principal");
 194         _krb5_principalname2krb5_principal(context, &c2,
 195                                            authent->cname, authent->crealm);
 196         if(!krb5_principal_compare(context, c1, c2)) {
 197             char *s;
 198             ret = krb5_unparse_name(context, c2, &s);
 199             if (ret)
 200                 s = unparseable_name;
 201             krb5_errx(context, 1, "Unauthorized connection from %s", s);
 202         }
 203         krb5_free_principal(context, c1);
 204         krb5_free_principal(context, c2);
 205
 206         ret = krb5_kt_close(context, keytab);
 207         if(ret)
 208             krb5_err(context, 1, ret, "krb5_kt_close");
 209     }
 210
 211     if(!print_dump) {
 212         asprintf(&tmp_db, "%s~", database);
 213
 214         ret = hdb_create(context, &db, tmp_db);
 215         if(ret)
 216             krb5_err(context, 1, ret, "hdb_create(%s)", tmp_db);
 217         ret = db->hdb_open(context, db, O_RDWR | O_CREAT | O_TRUNC, 0600);
 218         if(ret)
 219             krb5_err(context, 1, ret, "hdb_open(%s)", tmp_db);
 220     }
 221
 222     nprincs = 0;
 223     while(1){
 224         krb5_data data;
 225         hdb_entry_ex entry;
 226
 227         if(from_stdin) {
 228             ret = krb5_read_message(context, &sock, &data);
 229             if(ret != 0 && ret != HEIM_ERR_EOF)
 230                 krb5_err(context, 1, ret, "krb5_read_message");
 231         } else {
 232             ret = krb5_read_priv_message(context, ac, &sock, &data);
 233             if(ret)
 234                 krb5_err(context, 1, ret, "krb5_read_priv_message");
 235         }
 236
 237         if(ret == HEIM_ERR_EOF || data.length == 0) {
 238             if(!from_stdin) {
 239                 data.data = NULL;
 240                 data.length = 0;
 241                 krb5_write_priv_message(context, ac, &sock, &data);
 242             }
 243             if(!print_dump) {
 244                 ret = db->hdb_close(context, db);
 245                 if(ret)
 246                     krb5_err(context, 1, ret, "db_close");
 247                 ret = db->hdb_rename(context, db, database);
 248                 if(ret)
 249                     krb5_err(context, 1, ret, "db_rename");
 250             }
 251             break;
 252         }
 253         memset(&entry, 0, sizeof(entry));
 254         ret = hdb_value2entry(context, &data, &entry.entry);
 255         krb5_data_free(&data);
 256         if(ret)
 257             krb5_err(context, 1, ret, "hdb_value2entry");
 258         if(print_dump)
 259             hdb_print_entry(context, db, &entry, stdout);
 260         else {
 261             ret = db->hdb_store(context, db, 0, &entry);
 262             if(ret == HDB_ERR_EXISTS) {
 263                 char *s;
 264                 ret = krb5_unparse_name(context, entry.entry.principal, &s);
 265                 if (ret)
 266                     s = strdup(unparseable_name);
 267                 krb5_warnx(context, "Entry exists: %s", s);
 268                 free(s);
 269             } else if(ret)
 270                 krb5_err(context, 1, ret, "db_store");
 271             else
 272                 nprincs++;
 273         }
 274         hdb_free_entry(context, &entry);
 275     }
 276     if (!print_dump)
 277         krb5_log(context, fac, 0, "Received %d principals", nprincs);
 278
 279     if (inetd_flag == 0)
 280         rk_closesocket(sock);
 281
 282     exit(0);
 283 }