1/*
2 * Copyright (c) 2004, PADL Software Pty Ltd.
3 * All rights reserved.
4 *
5 * Portions Copyright (c) 2009 Apple Inc. 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	maj_stat = _gsskrb5_register_acceptor_identity(minor_status, str);
160	free(str);
161
162	return maj_stat;
163
164    } else if (gss_oid_equal(desired_object, GSS_KRB5_SET_DEFAULT_REALM_X)) {
165	char *str;
166
167	maj_stat = get_string(minor_status, value, &str);
168	if (maj_stat != GSS_S_COMPLETE)
169	    return maj_stat;
170	if (str == NULL) {
171	    *minor_status = 0;
172	    return GSS_S_CALL_INACCESSIBLE_READ;
173	}
174
175	krb5_set_default_realm(context, str);
176	free(str);
177
178	*minor_status = 0;
179	return GSS_S_COMPLETE;
180
181#ifndef HEIMDAL_SMALLER
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#endif
202    } else if (gss_oid_equal(desired_object, GSS_KRB5_CCACHE_NAME_X)) {
203	char *str;
204
205	maj_stat = get_string(minor_status, value, &str);
206	if (maj_stat != GSS_S_COMPLETE)
207	    return maj_stat;
208
209	*minor_status = krb5_cc_set_default_name(context, str);
210	if (str)
211	    free(str);
212	if (*minor_status)
213	    return GSS_S_FAILURE;
214
215	return GSS_S_COMPLETE;
216    } else if (gss_oid_equal(desired_object, GSS_KRB5_SET_TIME_OFFSET_X)) {
217	OM_uint32 offset;
218	time_t t;
219
220	maj_stat = get_int32(minor_status, value, &offset);
221	if (maj_stat != GSS_S_COMPLETE)
222	    return maj_stat;
223
224	t = time(NULL) + offset;
225
226	krb5_set_real_time(context, t, 0);
227
228	*minor_status = 0;
229	return GSS_S_COMPLETE;
230    } else if (gss_oid_equal(desired_object, GSS_KRB5_GET_TIME_OFFSET_X)) {
231	krb5_timestamp sec;
232	int32_t usec;
233	time_t t;
234
235	t = time(NULL);
236
237	krb5_us_timeofday (context, &sec, &usec);
238
239	maj_stat = set_int32(minor_status, value, (OM_uint32)(sec - t));
240	if (maj_stat != GSS_S_COMPLETE)
241	    return maj_stat;
242
243	*minor_status = 0;
244	return GSS_S_COMPLETE;
245    } else if (gss_oid_equal(desired_object, GSS_KRB5_PLUGIN_REGISTER_X)) {
246	struct gsskrb5_krb5_plugin c;
247
248	if (value->length != sizeof(c)) {
249	    *minor_status = EINVAL;
250	    return GSS_S_FAILURE;
251	}
252	memcpy(&c, value->value, sizeof(c));
253	krb5_plugin_register(context, c.type, c.name, c.symbol);
254
255	*minor_status = 0;
256	return GSS_S_COMPLETE;
257    }
258
259    *minor_status = EINVAL;
260    return GSS_S_FAILURE;
261}
262