crypto/dist/heimdal/kdc/hpropd.c

   1 /*
   2  * Copyright (c) 1997-2006 Kungliga Tekniska Högskolan
   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("$Heimdal: hpropd.c 22245 2007-12-08 23:48:52Z lha $"
  37         "$NetBSD$");
  38
  39 static int inetd_flag = -1;
  40 static int help_flag;
  41 static int version_flag;
  42 static int print_dump;
  43 static const char *database;
  44 static int from_stdin;
  45 static char *local_realm;
  46 static char *ktname = NULL;
  47
  48 struct getargs args[] = {
  49     { "database", 'd', arg_string, &database, "database", "file" },
  50     { "stdin",    'n', arg_flag, &from_stdin, "read from stdin" },
  51     { "print",      0, arg_flag, &print_dump, "print dump to stdout" },
  52     { "inetd",     'i', arg_negative_flag,      &inetd_flag,
  53       "Not started from inetd" },
  54     { "keytab",   'k',  arg_string, &ktname,    "keytab to use for authentication", "keytab" },
  55     { "realm",   'r',   arg_string, &local_realm, "realm to use" },
  56     { "version",    0, arg_flag, &version_flag, NULL, NULL },
  57     { "help",    'h',  arg_flag, &help_flag, NULL, NULL}
  58 };
  59
  60 static int num_args = sizeof(args) / sizeof(args[0]);
  61
  62 static void
  63 usage(int ret)
  64 {
  65     arg_printusage (args, num_args, NULL, "");
  66     exit (ret);
  67 }
  68
  69 int
  70 main(int argc, char **argv)
  71 {
  72     krb5_error_code ret;
  73     krb5_context context;
  74     krb5_auth_context ac = NULL;
  75     krb5_principal c1, c2;
  76     krb5_authenticator authent;
  77     krb5_keytab keytab;
  78     int fd;
  79     HDB *db;
  80     int optidx = 0;
  81     char *tmp_db;
  82     krb5_log_facility *fac;
  83     int nprincs;
  84
  85     setprogname(argv[0]);
  86
  87     ret = krb5_init_context(&context);
  88     if(ret)
  89         exit(1);
  90
  91     ret = krb5_openlog(context, "hpropd", &fac);
  92     if(ret)
  93         ;
  94     krb5_set_warn_dest(context, fac);
  95
  96     if(getarg(args, num_args, argc, argv, &optidx))
  97         usage(1);
  98
  99     if(local_realm != NULL)
 100         krb5_set_default_realm(context, local_realm);
 101
 102     if(help_flag)
 103         usage(0);
 104     if(version_flag) {
 105         print_version(NULL);
 106         exit(0);
 107     }
 108
 109     argc -= optidx;
 110     argv += optidx;
 111
 112     if (argc != 0)
 113         usage(1);
 114
 115     if (database == NULL)
 116         database = hdb_default_db(context);
 117
 118     if(from_stdin)
 119         fd = STDIN_FILENO;
 120     else {
 121         struct sockaddr_storage ss;
 122         struct sockaddr *sa = (struct sockaddr *)&ss;
 123         socklen_t sin_len = sizeof(ss);
 124         char addr_name[256];
 125         krb5_ticket *ticket;
 126         char *server;
 127
 128         fd = STDIN_FILENO;
 129         if (inetd_flag == -1) {
 130             if (getpeername (fd, sa, &sin_len) < 0)
 131                 inetd_flag = 0;
 132             else
 133                 inetd_flag = 1;
 134         }
 135         if (!inetd_flag) {
 136             mini_inetd (krb5_getportbyname (context, "hprop", "tcp",
 137                                             HPROP_PORT));
 138         }
 139         sin_len = sizeof(ss);
 140         if(getpeername(fd, sa, &sin_len) < 0)
 141             krb5_err(context, 1, errno, "getpeername");
 142
 143         if (inet_ntop(sa->sa_family,
 144                       socket_get_address (sa),
 145                       addr_name,
 146                       sizeof(addr_name)) == NULL)
 147             strlcpy (addr_name, "unknown address",
 148                      sizeof(addr_name));
 149
 150         krb5_log(context, fac, 0, "Connection from %s", addr_name);
 151
 152         ret = krb5_kt_register(context, &hdb_kt_ops);
 153         if(ret)
 154             krb5_err(context, 1, ret, "krb5_kt_register");
 155
 156         if (ktname != NULL) {
 157             ret = krb5_kt_resolve(context, ktname, &keytab);
 158             if (ret)
 159                 krb5_err (context, 1, ret, "krb5_kt_resolve %s", ktname);
 160         } else {
 161             ret = krb5_kt_default (context, &keytab);
 162             if (ret)
 163                 krb5_err (context, 1, ret, "krb5_kt_default");
 164         }
 165
 166         ret = krb5_recvauth(context, &ac, &fd, HPROP_VERSION, NULL,
 167                             0, keytab, &ticket);
 168         if(ret)
 169             krb5_err(context, 1, ret, "krb5_recvauth");
 170
 171         ret = krb5_unparse_name(context, ticket->server, &server);
 172         if (ret)
 173             krb5_err(context, 1, ret, "krb5_unparse_name");
 174         if (strncmp(server, "hprop/", 5) != 0)
 175             krb5_errx(context, 1, "ticket not for hprop (%s)", server);
 176
 177         free(server);
 178         krb5_free_ticket (context, ticket);
 179
 180         ret = krb5_auth_con_getauthenticator(context, ac, &authent);
 181         if(ret)
 182             krb5_err(context, 1, ret, "krb5_auth_con_getauthenticator");
 183
 184         ret = krb5_make_principal(context, &c1, NULL, "kadmin", "hprop", NULL);
 185         if(ret)
 186             krb5_err(context, 1, ret, "krb5_make_principal");
 187         _krb5_principalname2krb5_principal(context, &c2,
 188                                            authent->cname, authent->crealm);
 189         if(!krb5_principal_compare(context, c1, c2)) {
 190             char *s;
 191             ret = krb5_unparse_name(context, c2, &s);
 192             if (ret)
 193                 s = "unparseable name";
 194             krb5_errx(context, 1, "Unauthorized connection from %s", s);
 195         }
 196         krb5_free_principal(context, c1);
 197         krb5_free_principal(context, c2);
 198
 199         ret = krb5_kt_close(context, keytab);
 200         if(ret)
 201             krb5_err(context, 1, ret, "krb5_kt_close");
 202     }
 203
 204     if(!print_dump) {
 205         asprintf(&tmp_db, "%s~", database);
 206
 207         ret = hdb_create(context, &db, tmp_db);
 208         if(ret)
 209             krb5_err(context, 1, ret, "hdb_create(%s)", tmp_db);
 210         ret = db->hdb_open(context, db, O_RDWR | O_CREAT | O_TRUNC, 0600);
 211         if(ret)
 212             krb5_err(context, 1, ret, "hdb_open(%s)", tmp_db);
 213     }
 214
 215     nprincs = 0;
 216     while(1){
 217         krb5_data data;
 218         hdb_entry_ex entry;
 219
 220         if(from_stdin) {
 221             ret = krb5_read_message(context, &fd, &data);
 222             if(ret != 0 && ret != HEIM_ERR_EOF)
 223                 krb5_err(context, 1, ret, "krb5_read_message");
 224         } else {
 225             ret = krb5_read_priv_message(context, ac, &fd, &data);
 226             if(ret)
 227                 krb5_err(context, 1, ret, "krb5_read_priv_message");
 228         }
 229
 230         if(ret == HEIM_ERR_EOF || data.length == 0) {
 231             if(!from_stdin) {
 232                 data.data = NULL;
 233                 data.length = 0;
 234                 krb5_write_priv_message(context, ac, &fd, &data);
 235             }
 236             if(!print_dump) {
 237                 ret = db->hdb_rename(context, db, database);
 238                 if(ret)
 239                     krb5_err(context, 1, ret, "db_rename");
 240                 ret = db->hdb_close(context, db);
 241                 if(ret)
 242                     krb5_err(context, 1, ret, "db_close");
 243             }
 244             break;
 245         }
 246         memset(&entry, 0, sizeof(entry));
 247         ret = hdb_value2entry(context, &data, &entry.entry);
 248         krb5_data_free(&data);
 249         if(ret)
 250             krb5_err(context, 1, ret, "hdb_value2entry");
 251         if(print_dump)
 252             hdb_print_entry(context, db, &entry, stdout);
 253         else {
 254             ret = db->hdb_store(context, db, 0, &entry);
 255             if(ret == HDB_ERR_EXISTS) {
 256                 char *s;
 257                 ret = krb5_unparse_name(context, entry.entry.principal, &s);
 258                 if (ret)
 259                     s = strdup("unparseable name");
 260                 krb5_warnx(context, "Entry exists: %s", s);
 261                 free(s);
 262             } else if(ret)
 263                 krb5_err(context, 1, ret, "db_store");
 264             else
 265                 nprincs++;
 266         }
 267         hdb_free_entry(context, &entry);
 268     }
 269     if (!print_dump)
 270         krb5_log(context, fac, 0, "Received %d principals", nprincs);
 271     exit(0);
 272 }