1/*
2 * Copyright (c) 1997-2007 Kungliga Tekniska H��gskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
4 * All rights reserved.
5 *
6 * Portions Copyright (c) 2009 Apple Inc. 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 "kdc_locl.h"
37#include <getarg.h>
38#include <parse_bytes.h>
39
40krb5_error_code
41krb5_kdc_get_config(krb5_context context, krb5_kdc_configuration **config)
42{
43    krb5_kdc_configuration *c;
44
45    c = calloc(1, sizeof(*c));
46    if (c == NULL) {
47	krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
48	return ENOMEM;
49    }
50
51    c->require_preauth = TRUE;
52    c->kdc_warn_pwexpire = 0;
53    c->encode_as_rep_as_tgs_rep = FALSE;
54    c->tgt_use_strongest_session_key = FALSE;
55    c->preauth_use_strongest_session_key = FALSE;
56    c->svc_use_strongest_session_key = FALSE;
57    c->use_strongest_server_key = TRUE;
58    c->check_ticket_addresses = TRUE;
59    c->allow_null_ticket_addresses = TRUE;
60    c->allow_anonymous = FALSE;
61    c->trpolicy = TRPOLICY_ALWAYS_CHECK;
62    c->enable_pkinit = FALSE;
63    c->pkinit_princ_in_cert = TRUE;
64    c->pkinit_require_binding = TRUE;
65    c->db = NULL;
66    c->num_db = 0;
67    c->logf = NULL;
68
69    c->require_preauth =
70	krb5_config_get_bool_default(context, NULL,
71				     c->require_preauth,
72				     "kdc", "require-preauth", NULL);
73#ifdef DIGEST
74    c->enable_digest =
75	krb5_config_get_bool_default(context, NULL,
76				     FALSE,
77				     "kdc", "enable-digest", NULL);
78
79    {
80	const char *digests;
81
82	digests = krb5_config_get_string(context, NULL,
83					 "kdc",
84					 "digests_allowed", NULL);
85	if (digests == NULL)
86	    digests = "ntlm-v2";
87	c->digests_allowed = parse_flags(digests,_kdc_digestunits, 0);
88	if (c->digests_allowed == -1) {
89	    kdc_log(context, c, 0,
90		    "unparsable digest units (%s), turning off digest",
91		    digests);
92	    c->enable_digest = 0;
93	} else if (c->digests_allowed == 0) {
94	    kdc_log(context, c, 0,
95		    "no digest enable, turning digest off",
96		    digests);
97	    c->enable_digest = 0;
98	}
99    }
100#endif
101
102#ifdef KX509
103    c->enable_kx509 =
104	krb5_config_get_bool_default(context, NULL,
105				     FALSE,
106				     "kdc", "enable-kx509", NULL);
107
108    if (c->enable_kx509) {
109	c->kx509_template =
110	    krb5_config_get_string(context, NULL,
111				   "kdc", "kx509_template", NULL);
112	c->kx509_ca =
113	    krb5_config_get_string(context, NULL,
114				   "kdc", "kx509_ca", NULL);
115	if (c->kx509_ca == NULL || c->kx509_template == NULL) {
116	    kdc_log(context, c, 0,
117		    "missing kx509 configuration, turning off");
118	    c->enable_kx509 = FALSE;
119	}
120    }
121#endif
122
123    c->tgt_use_strongest_session_key =
124	krb5_config_get_bool_default(context, NULL,
125				     c->tgt_use_strongest_session_key,
126				     "kdc",
127				     "tgt-use-strongest-session-key", NULL);
128    c->preauth_use_strongest_session_key =
129	krb5_config_get_bool_default(context, NULL,
130				     c->preauth_use_strongest_session_key,
131				     "kdc",
132				     "preauth-use-strongest-session-key", NULL);
133    c->svc_use_strongest_session_key =
134	krb5_config_get_bool_default(context, NULL,
135				     c->svc_use_strongest_session_key,
136				     "kdc",
137				     "svc-use-strongest-session-key", NULL);
138    c->use_strongest_server_key =
139	krb5_config_get_bool_default(context, NULL,
140				     c->use_strongest_server_key,
141				     "kdc",
142				     "use-strongest-server-key", NULL);
143
144    c->check_ticket_addresses =
145	krb5_config_get_bool_default(context, NULL,
146				     c->check_ticket_addresses,
147				     "kdc",
148				     "check-ticket-addresses", NULL);
149    c->allow_null_ticket_addresses =
150	krb5_config_get_bool_default(context, NULL,
151				     c->allow_null_ticket_addresses,
152				     "kdc",
153				     "allow-null-ticket-addresses", NULL);
154
155    c->allow_anonymous =
156	krb5_config_get_bool_default(context, NULL,
157				     c->allow_anonymous,
158				     "kdc",
159				     "allow-anonymous", NULL);
160
161    c->max_datagram_reply_length =
162	krb5_config_get_int_default(context,
163				    NULL,
164				    1400,
165				    "kdc",
166				    "max-kdc-datagram-reply-length",
167				    NULL);
168
169    {
170	const char *trpolicy_str;
171
172	trpolicy_str =
173	    krb5_config_get_string_default(context, NULL, "DEFAULT", "kdc",
174					   "transited-policy", NULL);
175	if(strcasecmp(trpolicy_str, "always-check") == 0) {
176	    c->trpolicy = TRPOLICY_ALWAYS_CHECK;
177	} else if(strcasecmp(trpolicy_str, "allow-per-principal") == 0) {
178	    c->trpolicy = TRPOLICY_ALLOW_PER_PRINCIPAL;
179	} else if(strcasecmp(trpolicy_str, "always-honour-request") == 0) {
180	    c->trpolicy = TRPOLICY_ALWAYS_HONOUR_REQUEST;
181	} else if(strcasecmp(trpolicy_str, "DEFAULT") == 0) {
182	    /* default */
183	} else {
184	    kdc_log(context, c, 0,
185		    "unknown transited-policy: %s, "
186		    "reverting to default (always-check)",
187		    trpolicy_str);
188	}
189    }
190
191    c->encode_as_rep_as_tgs_rep =
192	krb5_config_get_bool_default(context, NULL,
193				     c->encode_as_rep_as_tgs_rep,
194				     "kdc",
195				     "encode_as_rep_as_tgs_rep", NULL);
196
197    c->kdc_warn_pwexpire =
198	krb5_config_get_time_default (context, NULL,
199				      c->kdc_warn_pwexpire,
200				      "kdc", "kdc_warn_pwexpire", NULL);
201
202
203    c->enable_pkinit =
204	krb5_config_get_bool_default(context,
205				     NULL,
206				     c->enable_pkinit,
207				     "kdc",
208				     "enable-pkinit",
209				     NULL);
210
211
212    c->pkinit_kdc_identity =
213	krb5_config_get_string(context, NULL,
214			       "kdc", "pkinit_identity", NULL);
215    c->pkinit_kdc_anchors =
216	krb5_config_get_string(context, NULL,
217			       "kdc", "pkinit_anchors", NULL);
218    c->pkinit_kdc_cert_pool =
219	krb5_config_get_strings(context, NULL,
220				"kdc", "pkinit_pool", NULL);
221    c->pkinit_kdc_revoke =
222	krb5_config_get_strings(context, NULL,
223				"kdc", "pkinit_revoke", NULL);
224    c->pkinit_kdc_ocsp_file =
225	krb5_config_get_string(context, NULL,
226			       "kdc", "pkinit_kdc_ocsp", NULL);
227    c->pkinit_kdc_friendly_name =
228	krb5_config_get_string(context, NULL,
229			       "kdc", "pkinit_kdc_friendly_name", NULL);
230    c->pkinit_princ_in_cert =
231	krb5_config_get_bool_default(context, NULL,
232				     c->pkinit_princ_in_cert,
233				     "kdc",
234				     "pkinit_principal_in_certificate",
235				     NULL);
236    c->pkinit_require_binding =
237	krb5_config_get_bool_default(context, NULL,
238				     c->pkinit_require_binding,
239				     "kdc",
240				     "pkinit_win2k_require_binding",
241				     NULL);
242    c->pkinit_dh_min_bits =
243	krb5_config_get_int_default(context, NULL,
244				    0,
245				    "kdc", "pkinit_dh_min_bits", NULL);
246
247    *config = c;
248
249    return 0;
250}
251
252krb5_error_code
253krb5_kdc_pkinit_config(krb5_context context, krb5_kdc_configuration *config)
254{
255#ifdef PKINIT
256#ifdef __APPLE__
257    config->enable_pkinit = 1;
258
259    if (config->pkinit_kdc_identity == NULL) {
260	if (config->pkinit_kdc_friendly_name == NULL)
261	    config->pkinit_kdc_friendly_name =
262		strdup("O=System Identity,CN=com.apple.kerberos.kdc");
263	config->pkinit_kdc_identity = strdup("KEYCHAIN:");
264    }
265    if (config->pkinit_kdc_anchors == NULL)
266	config->pkinit_kdc_anchors = strdup("KEYCHAIN:");
267
268#endif /* __APPLE__ */
269
270    if (config->enable_pkinit) {
271	if (config->pkinit_kdc_identity == NULL)
272	    krb5_errx(context, 1, "pkinit enabled but no identity");
273
274	if (config->pkinit_kdc_anchors == NULL)
275	    krb5_errx(context, 1, "pkinit enabled but no X509 anchors");
276
277	krb5_kdc_pk_initialize(context, config,
278			       config->pkinit_kdc_identity,
279			       config->pkinit_kdc_anchors,
280			       config->pkinit_kdc_cert_pool,
281			       config->pkinit_kdc_revoke);
282
283    }
284
285    return 0;
286#endif /* PKINIT */
287}
288