1/*	$NetBSD$	*/
2
3/*
4 * Copyright (c) 2004, PADL Software Pty Ltd.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 *
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 *
18 * 3. Neither the name of PADL Software nor the names of its contributors
19 *    may be used to endorse or promote products derived from this software
20 *    without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY PADL SOFTWARE AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED.  IN NO EVENT SHALL PADL SOFTWARE OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35/*
36 *  glue routine for _gsskrb5_inquire_sec_context_by_oid
37 */
38
39#include "gsskrb5_locl.h"
40
41static OM_uint32
42get_bool(OM_uint32 *minor_status,
43	 const gss_buffer_t value,
44	 int *flag)
45{
46    if (value->value == NULL || value->length != 1) {
47	*minor_status = EINVAL;
48	return GSS_S_FAILURE;
49    }
50    *flag = *((const char *)value->value) != 0;
51    return GSS_S_COMPLETE;
52}
53
54static OM_uint32
55get_string(OM_uint32 *minor_status,
56	   const gss_buffer_t value,
57	   char **str)
58{
59    if (value == NULL || value->length == 0) {
60	*str = NULL;
61    } else {
62	*str = malloc(value->length + 1);
63	if (*str == NULL) {
64	    *minor_status = 0;
65	    return GSS_S_UNAVAILABLE;
66	}
67	memcpy(*str, value->value, value->length);
68	(*str)[value->length] = '\0';
69    }
70    return GSS_S_COMPLETE;
71}
72
73static OM_uint32
74get_int32(OM_uint32 *minor_status,
75	  const gss_buffer_t value,
76	  OM_uint32 *ret)
77{
78    *minor_status = 0;
79    if (value == NULL || value->length == 0)
80	*ret = 0;
81    else if (value->length == sizeof(*ret))
82	memcpy(ret, value->value, sizeof(*ret));
83    else
84	return GSS_S_UNAVAILABLE;
85
86    return GSS_S_COMPLETE;
87}
88
89static OM_uint32
90set_int32(OM_uint32 *minor_status,
91	  const gss_buffer_t value,
92	  OM_uint32 set)
93{
94    *minor_status = 0;
95    if (value->length == sizeof(set))
96	memcpy(value->value, &set, sizeof(set));
97    else
98	return GSS_S_UNAVAILABLE;
99
100    return GSS_S_COMPLETE;
101}
102
103OM_uint32 GSSAPI_CALLCONV
104_gsskrb5_set_sec_context_option
105           (OM_uint32 *minor_status,
106            gss_ctx_id_t *context_handle,
107            const gss_OID desired_object,
108            const gss_buffer_t value)
109{
110    krb5_context context;
111    OM_uint32 maj_stat;
112
113    GSSAPI_KRB5_INIT (&context);
114
115    if (value == GSS_C_NO_BUFFER) {
116	*minor_status = EINVAL;
117	return GSS_S_FAILURE;
118    }
119
120    if (gss_oid_equal(desired_object, GSS_KRB5_COMPAT_DES3_MIC_X)) {
121	gsskrb5_ctx ctx;
122	int flag;
123
124	if (*context_handle == GSS_C_NO_CONTEXT) {
125	    *minor_status = EINVAL;
126	    return GSS_S_NO_CONTEXT;
127	}
128
129	maj_stat = get_bool(minor_status, value, &flag);
130	if (maj_stat != GSS_S_COMPLETE)
131	    return maj_stat;
132
133	ctx = (gsskrb5_ctx)*context_handle;
134	HEIMDAL_MUTEX_lock(&ctx->ctx_id_mutex);
135	if (flag)
136	    ctx->more_flags |= COMPAT_OLD_DES3;
137	else
138	    ctx->more_flags &= ~COMPAT_OLD_DES3;
139	ctx->more_flags |= COMPAT_OLD_DES3_SELECTED;
140	HEIMDAL_MUTEX_unlock(&ctx->ctx_id_mutex);
141	return GSS_S_COMPLETE;
142    } else if (gss_oid_equal(desired_object, GSS_KRB5_SET_DNS_CANONICALIZE_X)) {
143	int flag;
144
145	maj_stat = get_bool(minor_status, value, &flag);
146	if (maj_stat != GSS_S_COMPLETE)
147	    return maj_stat;
148
149	krb5_set_dns_canonicalize_hostname(context, flag);
150	return GSS_S_COMPLETE;
151
152    } else if (gss_oid_equal(desired_object, GSS_KRB5_REGISTER_ACCEPTOR_IDENTITY_X)) {
153	char *str;
154
155	maj_stat = get_string(minor_status, value, &str);
156	if (maj_stat != GSS_S_COMPLETE)
157	    return maj_stat;
158
159	_gsskrb5_register_acceptor_identity(str);
160	free(str);
161
162	*minor_status = 0;
163	return GSS_S_COMPLETE;
164
165    } else if (gss_oid_equal(desired_object, GSS_KRB5_SET_DEFAULT_REALM_X)) {
166	char *str;
167
168	maj_stat = get_string(minor_status, value, &str);
169	if (maj_stat != GSS_S_COMPLETE)
170	    return maj_stat;
171	if (str == NULL) {
172	    *minor_status = 0;
173	    return GSS_S_CALL_INACCESSIBLE_READ;
174	}
175
176	krb5_set_default_realm(context, str);
177	free(str);
178
179	*minor_status = 0;
180	return GSS_S_COMPLETE;
181
182    } else if (gss_oid_equal(desired_object, GSS_KRB5_SEND_TO_KDC_X)) {
183
184	if (value == NULL || value->length == 0) {
185	    krb5_set_send_to_kdc_func(context, NULL, NULL);
186	} else {
187	    struct gsskrb5_send_to_kdc c;
188
189	    if (value->length != sizeof(c)) {
190		*minor_status = EINVAL;
191		return GSS_S_FAILURE;
192	    }
193	    memcpy(&c, value->value, sizeof(c));
194	    krb5_set_send_to_kdc_func(context,
195				      (krb5_send_to_kdc_func)c.func,
196				      c.ptr);
197	}
198
199	*minor_status = 0;
200	return GSS_S_COMPLETE;
201    } else if (gss_oid_equal(desired_object, GSS_KRB5_CCACHE_NAME_X)) {
202	char *str;
203
204	maj_stat = get_string(minor_status, value, &str);
205	if (maj_stat != GSS_S_COMPLETE)
206	    return maj_stat;
207	if (str == NULL) {
208	    *minor_status = 0;
209	    return GSS_S_CALL_INACCESSIBLE_READ;
210	}
211
212	*minor_status = krb5_cc_set_default_name(context, str);
213	free(str);
214	if (*minor_status)
215	    return GSS_S_FAILURE;
216
217	return GSS_S_COMPLETE;
218    } else if (gss_oid_equal(desired_object, GSS_KRB5_SET_TIME_OFFSET_X)) {
219	OM_uint32 offset;
220	time_t t;
221
222	maj_stat = get_int32(minor_status, value, &offset);
223	if (maj_stat != GSS_S_COMPLETE)
224	    return maj_stat;
225
226	t = time(NULL) + offset;
227
228	krb5_set_real_time(context, t, 0);
229
230	*minor_status = 0;
231	return GSS_S_COMPLETE;
232    } else if (gss_oid_equal(desired_object, GSS_KRB5_GET_TIME_OFFSET_X)) {
233	krb5_timestamp sec;
234	int32_t usec;
235	time_t t;
236
237	t = time(NULL);
238
239	krb5_us_timeofday (context, &sec, &usec);
240
241	maj_stat = set_int32(minor_status, value, sec - t);
242	if (maj_stat != GSS_S_COMPLETE)
243	    return maj_stat;
244
245	*minor_status = 0;
246	return GSS_S_COMPLETE;
247    } else if (gss_oid_equal(desired_object, GSS_KRB5_PLUGIN_REGISTER_X)) {
248	struct gsskrb5_krb5_plugin c;
249
250	if (value->length != sizeof(c)) {
251	    *minor_status = EINVAL;
252	    return GSS_S_FAILURE;
253	}
254	memcpy(&c, value->value, sizeof(c));
255	krb5_plugin_register(context, c.type, c.name, c.symbol);
256
257	*minor_status = 0;
258	return GSS_S_COMPLETE;
259    }
260
261    *minor_status = EINVAL;
262    return GSS_S_FAILURE;
263}
264