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
usage(int ret)65 usage(int ret)
66 {
67 arg_printusage (args, num_args, NULL, "");
68 exit (ret);
69 }
70
71 int
main(int argc,char ** argv)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 }
284