1/*	$NetBSD: default_config.c,v 1.3 2023/06/19 21:41:41 christos Exp $	*/
2
3/*
4 * Copyright (c) 1997-2007 Kungliga Tekniska H��gskolan
5 * (Royal Institute of Technology, Stockholm, Sweden).
6 * All rights reserved.
7 *
8 * Portions Copyright (c) 2009 Apple Inc. All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 *
14 * 1. Redistributions of source code must retain the above copyright
15 *    notice, this list of conditions and the following disclaimer.
16 *
17 * 2. Redistributions in binary form must reproduce the above copyright
18 *    notice, this list of conditions and the following disclaimer in the
19 *    documentation and/or other materials provided with the distribution.
20 *
21 * 3. Neither the name of the Institute nor the names of its contributors
22 *    may be used to endorse or promote products derived from this software
23 *    without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 */
37
38#include "kdc_locl.h"
39#include <krb5/getarg.h>
40#include <krb5/parse_bytes.h>
41
42krb5_error_code
43krb5_kdc_get_config(krb5_context context, krb5_kdc_configuration **config)
44{
45    krb5_kdc_configuration *c;
46
47    c = calloc(1, sizeof(*c));
48    if (c == NULL) {
49	krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
50	return ENOMEM;
51    }
52
53    c->num_kdc_processes = -1;
54    c->require_preauth = TRUE;
55    c->kdc_warn_pwexpire = 0;
56    c->encode_as_rep_as_tgs_rep = FALSE;
57    c->tgt_use_strongest_session_key = FALSE;
58    c->preauth_use_strongest_session_key = FALSE;
59    c->svc_use_strongest_session_key = FALSE;
60    c->use_strongest_server_key = TRUE;
61    c->check_ticket_addresses = TRUE;
62    c->allow_null_ticket_addresses = TRUE;
63    c->allow_anonymous = FALSE;
64    c->historical_anon_realm = FALSE;
65    c->strict_nametypes = FALSE;
66    c->trpolicy = TRPOLICY_ALWAYS_CHECK;
67    c->enable_pkinit = FALSE;
68    c->pkinit_princ_in_cert = TRUE;
69    c->pkinit_require_binding = TRUE;
70    c->db = NULL;
71    c->num_db = 0;
72    c->logf = NULL;
73
74    c->num_kdc_processes =
75        krb5_config_get_int_default(context, NULL, c->num_kdc_processes,
76				    "kdc", "num-kdc-processes", NULL);
77
78    c->require_preauth =
79	krb5_config_get_bool_default(context, NULL,
80				     c->require_preauth,
81				     "kdc", "require-preauth", NULL);
82#ifdef DIGEST
83    c->enable_digest =
84	krb5_config_get_bool_default(context, NULL,
85				     FALSE,
86				     "kdc", "enable-digest", NULL);
87
88    {
89	const char *digests;
90
91	digests = krb5_config_get_string(context, NULL,
92					 "kdc",
93					 "digests_allowed", NULL);
94	if (digests == NULL)
95	    digests = "ntlm-v2";
96	c->digests_allowed = parse_flags(digests,_kdc_digestunits, 0);
97	if (c->digests_allowed == -1) {
98	    kdc_log(context, c, 0,
99		    "unparsable digest units (%s), turning off digest",
100		    digests);
101	    c->enable_digest = 0;
102	} else if (c->digests_allowed == 0) {
103	    kdc_log(context, c, 0,
104		    "no digest enable, turning digest off",
105		    digests);
106	    c->enable_digest = 0;
107	}
108    }
109#endif
110
111#ifdef KX509
112    c->enable_kx509 =
113	krb5_config_get_bool_default(context, NULL,
114				     FALSE,
115				     "kdc", "enable-kx509", NULL);
116
117    if (c->enable_kx509) {
118	c->kx509_template =
119	    krb5_config_get_string(context, NULL,
120				   "kdc", "kx509_template", NULL);
121	c->kx509_ca =
122	    krb5_config_get_string(context, NULL,
123				   "kdc", "kx509_ca", NULL);
124	if (c->kx509_ca == NULL || c->kx509_template == NULL) {
125	    kdc_log(context, c, 0,
126		    "missing kx509 configuration, turning off");
127	    c->enable_kx509 = FALSE;
128	}
129    }
130#endif
131
132    c->tgt_use_strongest_session_key =
133	krb5_config_get_bool_default(context, NULL,
134				     c->tgt_use_strongest_session_key,
135				     "kdc",
136				     "tgt-use-strongest-session-key", NULL);
137    c->preauth_use_strongest_session_key =
138	krb5_config_get_bool_default(context, NULL,
139				     c->preauth_use_strongest_session_key,
140				     "kdc",
141				     "preauth-use-strongest-session-key", NULL);
142    c->svc_use_strongest_session_key =
143	krb5_config_get_bool_default(context, NULL,
144				     c->svc_use_strongest_session_key,
145				     "kdc",
146				     "svc-use-strongest-session-key", NULL);
147    c->use_strongest_server_key =
148	krb5_config_get_bool_default(context, NULL,
149				     c->use_strongest_server_key,
150				     "kdc",
151				     "use-strongest-server-key", NULL);
152
153    c->check_ticket_addresses =
154	krb5_config_get_bool_default(context, NULL,
155				     c->check_ticket_addresses,
156				     "kdc",
157				     "check-ticket-addresses", NULL);
158    c->allow_null_ticket_addresses =
159	krb5_config_get_bool_default(context, NULL,
160				     c->allow_null_ticket_addresses,
161				     "kdc",
162				     "allow-null-ticket-addresses", NULL);
163
164    c->allow_anonymous =
165	krb5_config_get_bool_default(context, NULL,
166				     c->allow_anonymous,
167				     "kdc",
168				     "allow-anonymous", NULL);
169
170    c->historical_anon_realm =
171	krb5_config_get_bool_default(context, NULL,
172				     c->historical_anon_realm,
173				     "kdc",
174				     "historical_anon_realm", NULL);
175
176    c->strict_nametypes =
177	krb5_config_get_bool_default(context, NULL,
178				     c->strict_nametypes,
179				     "kdc",
180				     "strict-nametypes", NULL);
181
182    c->max_datagram_reply_length =
183	krb5_config_get_int_default(context,
184				    NULL,
185				    1400,
186				    "kdc",
187				    "max-kdc-datagram-reply-length",
188				    NULL);
189
190    {
191	const char *trpolicy_str;
192
193	trpolicy_str =
194	    krb5_config_get_string_default(context, NULL, "DEFAULT", "kdc",
195					   "transited-policy", NULL);
196	if(strcasecmp(trpolicy_str, "always-check") == 0) {
197	    c->trpolicy = TRPOLICY_ALWAYS_CHECK;
198	} else if(strcasecmp(trpolicy_str, "allow-per-principal") == 0) {
199	    c->trpolicy = TRPOLICY_ALLOW_PER_PRINCIPAL;
200	} else if(strcasecmp(trpolicy_str, "always-honour-request") == 0) {
201	    c->trpolicy = TRPOLICY_ALWAYS_HONOUR_REQUEST;
202	} else if(strcasecmp(trpolicy_str, "DEFAULT") == 0) {
203	    /* default */
204	} else {
205	    kdc_log(context, c, 0,
206		    "unknown transited-policy: %s, "
207		    "reverting to default (always-check)",
208		    trpolicy_str);
209	}
210    }
211
212    c->encode_as_rep_as_tgs_rep =
213	krb5_config_get_bool_default(context, NULL,
214				     c->encode_as_rep_as_tgs_rep,
215				     "kdc",
216				     "encode_as_rep_as_tgs_rep", NULL);
217
218    c->kdc_warn_pwexpire =
219	krb5_config_get_time_default (context, NULL,
220				      c->kdc_warn_pwexpire,
221				      "kdc", "kdc_warn_pwexpire", NULL);
222
223
224    c->enable_pkinit =
225	krb5_config_get_bool_default(context,
226				     NULL,
227				     c->enable_pkinit,
228				     "kdc",
229				     "enable-pkinit",
230				     NULL);
231
232
233    c->pkinit_kdc_identity =
234	krb5_config_get_string(context, NULL,
235			       "kdc", "pkinit_identity", NULL);
236    c->pkinit_kdc_anchors =
237	krb5_config_get_string(context, NULL,
238			       "kdc", "pkinit_anchors", NULL);
239    c->pkinit_kdc_cert_pool =
240	krb5_config_get_strings(context, NULL,
241				"kdc", "pkinit_pool", NULL);
242    c->pkinit_kdc_revoke =
243	krb5_config_get_strings(context, NULL,
244				"kdc", "pkinit_revoke", NULL);
245    c->pkinit_kdc_ocsp_file =
246	krb5_config_get_string(context, NULL,
247			       "kdc", "pkinit_kdc_ocsp", NULL);
248    c->pkinit_kdc_friendly_name =
249	krb5_config_get_string(context, NULL,
250			       "kdc", "pkinit_kdc_friendly_name", NULL);
251    c->pkinit_princ_in_cert =
252	krb5_config_get_bool_default(context, NULL,
253				     c->pkinit_princ_in_cert,
254				     "kdc",
255				     "pkinit_principal_in_certificate",
256				     NULL);
257    c->pkinit_require_binding =
258	krb5_config_get_bool_default(context, NULL,
259				     c->pkinit_require_binding,
260				     "kdc",
261				     "pkinit_win2k_require_binding",
262				     NULL);
263    c->pkinit_dh_min_bits =
264	krb5_config_get_int_default(context, NULL,
265				    0,
266				    "kdc", "pkinit_dh_min_bits", NULL);
267
268    *config = c;
269
270    return 0;
271}
272
273krb5_error_code
274krb5_kdc_pkinit_config(krb5_context context, krb5_kdc_configuration *config)
275{
276#ifdef PKINIT
277#ifdef __APPLE__
278    config->enable_pkinit = 1;
279
280    if (config->pkinit_kdc_identity == NULL) {
281	if (config->pkinit_kdc_friendly_name == NULL)
282	    config->pkinit_kdc_friendly_name =
283		strdup("O=System Identity,CN=com.apple.kerberos.kdc");
284	config->pkinit_kdc_identity = strdup("KEYCHAIN:");
285    }
286    if (config->pkinit_kdc_anchors == NULL)
287	config->pkinit_kdc_anchors = strdup("KEYCHAIN:");
288
289#endif /* __APPLE__ */
290
291    if (config->enable_pkinit) {
292	if (config->pkinit_kdc_identity == NULL)
293	    krb5_errx(context, 1, "pkinit enabled but no identity");
294
295	if (config->pkinit_kdc_anchors == NULL)
296	    krb5_errx(context, 1, "pkinit enabled but no X509 anchors");
297
298	krb5_kdc_pk_initialize(context, config,
299			       config->pkinit_kdc_identity,
300			       config->pkinit_kdc_anchors,
301			       config->pkinit_kdc_cert_pool,
302			       config->pkinit_kdc_revoke);
303
304    }
305
306    return 0;
307#endif /* PKINIT */
308}
309