set_sec_context_option.c revision 178826 
1/*
2 * Copyright (c) 2004, PADL Software Pty Ltd.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 *
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * 3. Neither the name of PADL Software nor the names of its contributors
17 *    may be used to endorse or promote products derived from this software
18 *    without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY PADL SOFTWARE AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED.  IN NO EVENT SHALL PADL SOFTWARE OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33/*
34 *  glue routine for _gsskrb5_inquire_sec_context_by_oid
35 */
36
37#include "krb5/gsskrb5_locl.h"
38
39RCSID("$Id: set_sec_context_option.c 20384 2007-04-18 08:51:06Z lha $");
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
73OM_uint32
74_gsskrb5_set_sec_context_option
75           (OM_uint32 *minor_status,
76            gss_ctx_id_t *context_handle,
77            const gss_OID desired_object,
78            const gss_buffer_t value)
79{
80    krb5_context context;
81    OM_uint32 maj_stat;
82
83    GSSAPI_KRB5_INIT (&context);
84
85    if (value == GSS_C_NO_BUFFER) {
86	*minor_status = EINVAL;
87	return GSS_S_FAILURE;
88    }
89
90    if (gss_oid_equal(desired_object, GSS_KRB5_COMPAT_DES3_MIC_X)) {
91	gsskrb5_ctx ctx;
92	int flag;
93
94	if (*context_handle == GSS_C_NO_CONTEXT) {
95	    *minor_status = EINVAL;
96	    return GSS_S_NO_CONTEXT;
97	}
98
99	maj_stat = get_bool(minor_status, value, &flag);
100	if (maj_stat != GSS_S_COMPLETE)
101	    return maj_stat;
102
103	ctx = (gsskrb5_ctx)*context_handle;
104	HEIMDAL_MUTEX_lock(&ctx->ctx_id_mutex);
105	if (flag)
106	    ctx->more_flags |= COMPAT_OLD_DES3;
107	else
108	    ctx->more_flags &= ~COMPAT_OLD_DES3;
109	ctx->more_flags |= COMPAT_OLD_DES3_SELECTED;
110	HEIMDAL_MUTEX_unlock(&ctx->ctx_id_mutex);
111	return GSS_S_COMPLETE;
112    } else if (gss_oid_equal(desired_object, GSS_KRB5_SET_DNS_CANONICALIZE_X)) {
113	int flag;
114
115	maj_stat = get_bool(minor_status, value, &flag);
116	if (maj_stat != GSS_S_COMPLETE)
117	    return maj_stat;
118
119	krb5_set_dns_canonicalize_hostname(context, flag);
120	return GSS_S_COMPLETE;
121
122    } else if (gss_oid_equal(desired_object, GSS_KRB5_REGISTER_ACCEPTOR_IDENTITY_X)) {
123	char *str;
124
125	maj_stat = get_string(minor_status, value, &str);
126	if (maj_stat != GSS_S_COMPLETE)
127	    return maj_stat;
128
129	_gsskrb5_register_acceptor_identity(str);
130	free(str);
131
132	*minor_status = 0;
133	return GSS_S_COMPLETE;
134
135    } else if (gss_oid_equal(desired_object, GSS_KRB5_SET_DEFAULT_REALM_X)) {
136	char *str;
137
138	maj_stat = get_string(minor_status, value, &str);
139	if (maj_stat != GSS_S_COMPLETE)
140	    return maj_stat;
141	if (str == NULL) {
142	    *minor_status = 0;
143	    return GSS_S_CALL_INACCESSIBLE_READ;
144	}
145
146	krb5_set_default_realm(context, str);
147	free(str);
148
149	*minor_status = 0;
150	return GSS_S_COMPLETE;
151
152    } else if (gss_oid_equal(desired_object, GSS_KRB5_SEND_TO_KDC_X)) {
153
154	if (value == NULL || value->length == 0) {
155	    krb5_set_send_to_kdc_func(context, NULL, NULL);
156	} else {
157	    struct gsskrb5_send_to_kdc c;
158
159	    if (value->length != sizeof(c)) {
160		*minor_status = EINVAL;
161		return GSS_S_FAILURE;
162	    }
163	    memcpy(&c, value->value, sizeof(c));
164	    krb5_set_send_to_kdc_func(context,
165				      (krb5_send_to_kdc_func)c.func,
166				      c.ptr);
167	}
168
169	*minor_status = 0;
170	return GSS_S_COMPLETE;
171    } else if (gss_oid_equal(desired_object, GSS_KRB5_CCACHE_NAME_X)) {
172	char *str;
173
174	maj_stat = get_string(minor_status, value, &str);
175	if (maj_stat != GSS_S_COMPLETE)
176	    return maj_stat;
177	if (str == NULL) {
178	    *minor_status = 0;
179	    return GSS_S_CALL_INACCESSIBLE_READ;
180	}
181
182	*minor_status = krb5_cc_set_default_name(context, str);
183	free(str);
184	if (*minor_status)
185	    return GSS_S_FAILURE;
186
187	return GSS_S_COMPLETE;
188    }
189
190    *minor_status = EINVAL;
191    return GSS_S_FAILURE;
192}
193