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
36static int inetd_flag = -1;
37static int help_flag;
38static int version_flag;
39static int print_dump;
40static const char *database;
41static int from_stdin;
42static char *local_realm;
43static char *ktname = NULL;
44
45struct getargs args[] = {
46    { "database", 'd', arg_string, rk_UNCONST(&database), "database", "file" },
47    { "stdin",    'n', arg_flag, &from_stdin, "read from stdin", NULL },
48    { "print",	    0, arg_flag, &print_dump, "print dump to stdout", NULL },
49#ifdef SUPPORT_INETD
50    { "inetd",	   'i',	arg_negative_flag,	&inetd_flag,
51      "Not started from inetd", NULL },
52#endif
53    { "keytab",   'k',	arg_string, &ktname,	"keytab to use for authentication", "keytab" },
54    { "realm",   'r',	arg_string, &local_realm, "realm to use", NULL },
55    { "version",    0, arg_flag, &version_flag, NULL, NULL },
56    { "help",    'h',  arg_flag, &help_flag, NULL, NULL}
57};
58
59static int num_args = sizeof(args) / sizeof(args[0]);
60static char unparseable_name[] = "unparseable name";
61
62static void
63usage(int ret)
64{
65    arg_printusage (args, num_args, NULL, "");
66    exit (ret);
67}
68
69int
70main(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    krb5_socket_t sock = rk_INVALID_SOCKET;
79    HDB *db = NULL;
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	errx(1, "krb5_openlog");
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	sock = 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	sock = STDIN_FILENO;
129#ifdef SUPPORT_INETD
130	if (inetd_flag == -1) {
131	    if (getpeername (sock, sa, &sin_len) < 0) {
132		inetd_flag = 0;
133	    } else {
134		inetd_flag = 1;
135	    }
136	}
137#else
138	inetd_flag = 0;
139#endif
140	if (!inetd_flag) {
141	    mini_inetd (krb5_getportbyname (context, "hprop", "tcp",
142					    HPROP_PORT), &sock);
143	}
144	sin_len = sizeof(ss);
145	if(getpeername(sock, sa, &sin_len) < 0)
146	    krb5_err(context, 1, errno, "getpeername");
147
148	if (inet_ntop(sa->sa_family,
149		      socket_get_address (sa),
150		      addr_name,
151		      sizeof(addr_name)) == NULL)
152	    strlcpy (addr_name, "unknown address",
153		     sizeof(addr_name));
154
155	krb5_log(context, fac, 0, "Connection from %s", addr_name);
156
157	ret = krb5_kt_register(context, &hdb_kt_ops);
158	if(ret)
159	    krb5_err(context, 1, ret, "krb5_kt_register");
160
161	if (ktname != NULL) {
162	    ret = krb5_kt_resolve(context, ktname, &keytab);
163	    if (ret)
164		krb5_err (context, 1, ret, "krb5_kt_resolve %s", ktname);
165	} else {
166	    ret = krb5_kt_default (context, &keytab);
167	    if (ret)
168		krb5_err (context, 1, ret, "krb5_kt_default");
169	}
170
171	ret = krb5_recvauth(context, &ac, &sock, HPROP_VERSION, NULL,
172			    0, keytab, &ticket);
173	if(ret)
174	    krb5_err(context, 1, ret, "krb5_recvauth");
175
176	ret = krb5_unparse_name(context, ticket->server, &server);
177	if (ret)
178	    krb5_err(context, 1, ret, "krb5_unparse_name");
179	if (strncmp(server, "hprop/", 5) != 0)
180	    krb5_errx(context, 1, "ticket not for hprop (%s)", server);
181
182	free(server);
183	krb5_free_ticket (context, ticket);
184
185	ret = krb5_auth_con_getauthenticator(context, ac, &authent);
186	if(ret)
187	    krb5_err(context, 1, ret, "krb5_auth_con_getauthenticator");
188
189	ret = krb5_make_principal(context, &c1, NULL, "kadmin", "hprop", NULL);
190	if(ret)
191	    krb5_err(context, 1, ret, "krb5_make_principal");
192	_krb5_principalname2krb5_principal(context, &c2,
193					   authent->cname, authent->crealm);
194	if(!krb5_principal_compare(context, c1, c2)) {
195	    char *s;
196	    ret = krb5_unparse_name(context, c2, &s);
197	    if (ret)
198		s = unparseable_name;
199	    krb5_errx(context, 1, "Unauthorized connection from %s", s);
200	}
201	krb5_free_principal(context, c1);
202	krb5_free_principal(context, c2);
203
204	ret = krb5_kt_close(context, keytab);
205	if(ret)
206	    krb5_err(context, 1, ret, "krb5_kt_close");
207    }
208
209    if(!print_dump) {
210	asprintf(&tmp_db, "%s~", database);
211
212	ret = hdb_create(context, &db, tmp_db);
213	if(ret)
214	    krb5_err(context, 1, ret, "hdb_create(%s)", tmp_db);
215	ret = db->hdb_open(context, db, O_RDWR | O_CREAT | O_TRUNC, 0600);
216	if(ret)
217	    krb5_err(context, 1, ret, "hdb_open(%s)", tmp_db);
218    }
219
220    nprincs = 0;
221    while(1){
222	krb5_data data;
223	hdb_entry_ex entry;
224
225	if(from_stdin) {
226	    ret = krb5_read_message(context, &sock, &data);
227	    if(ret != 0 && ret != HEIM_ERR_EOF)
228		krb5_err(context, 1, ret, "krb5_read_message");
229	} else {
230	    ret = krb5_read_priv_message(context, ac, &sock, &data);
231	    if(ret)
232		krb5_err(context, 1, ret, "krb5_read_priv_message");
233	}
234
235	if(ret == HEIM_ERR_EOF || data.length == 0) {
236	    if(!from_stdin) {
237		data.data = NULL;
238		data.length = 0;
239		krb5_write_priv_message(context, ac, &sock, &data);
240	    }
241	    if(!print_dump) {
242		ret = db->hdb_close(context, db);
243		if(ret)
244		    krb5_err(context, 1, ret, "db_close");
245		ret = db->hdb_rename(context, db, database);
246		if(ret)
247		    krb5_err(context, 1, ret, "db_rename");
248	    }
249	    break;
250	}
251	memset(&entry, 0, sizeof(entry));
252	ret = hdb_value2entry(context, &data, &entry.entry);
253	krb5_data_free(&data);
254	if(ret)
255	    krb5_err(context, 1, ret, "hdb_value2entry");
256	if(print_dump)
257	    hdb_print_entry(context, db, &entry, stdout);
258	else {
259	    ret = db->hdb_store(context, db, 0, &entry);
260	    if(ret == HDB_ERR_EXISTS) {
261		char *s;
262		ret = krb5_unparse_name(context, entry.entry.principal, &s);
263		if (ret)
264		    s = strdup(unparseable_name);
265		krb5_warnx(context, "Entry exists: %s", s);
266		free(s);
267	    } else if(ret)
268		krb5_err(context, 1, ret, "db_store");
269	    else
270		nprincs++;
271	}
272	hdb_free_entry(context, &entry);
273    }
274    if (!print_dump)
275	krb5_log(context, fac, 0, "Received %d principals", nprincs);
276
277    if (inetd_flag == 0)
278	rk_closesocket(sock);
279
280    exit(0);
281}
282