1 /* $NetBSD: set_sec_context_option.c,v 1.2 2017/01/28 21:31:46 christos Exp $ */
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
41 static OM_uint32
get_bool(OM_uint32 * minor_status,const gss_buffer_t value,int * flag)42 get_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
54 static OM_uint32
get_string(OM_uint32 * minor_status,const gss_buffer_t value,char ** str)55 get_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
73 static OM_uint32
get_int32(OM_uint32 * minor_status,const gss_buffer_t value,OM_uint32 * ret)74 get_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
89 static OM_uint32
set_int32(OM_uint32 * minor_status,const gss_buffer_t value,OM_uint32 set)90 set_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
103 OM_uint32 GSSAPI_CALLCONV
_gsskrb5_set_sec_context_option(OM_uint32 * minor_status,gss_ctx_id_t * context_handle,const gss_OID desired_object,const gss_buffer_t value)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 } else if (gss_oid_equal(desired_object, GSS_KRB5_SEND_TO_KDC_X)) {
182
183 *minor_status = EINVAL;
184 return GSS_S_FAILURE;
185
186 } else if (gss_oid_equal(desired_object, GSS_KRB5_CCACHE_NAME_X)) {
187 char *str;
188
189 maj_stat = get_string(minor_status, value, &str);
190 if (maj_stat != GSS_S_COMPLETE)
191 return maj_stat;
192 if (str == NULL) {
193 *minor_status = 0;
194 return GSS_S_CALL_INACCESSIBLE_READ;
195 }
196
197 *minor_status = krb5_cc_set_default_name(context, str);
198 free(str);
199 if (*minor_status)
200 return GSS_S_FAILURE;
201
202 return GSS_S_COMPLETE;
203 } else if (gss_oid_equal(desired_object, GSS_KRB5_SET_TIME_OFFSET_X)) {
204 OM_uint32 offset;
205 time_t t;
206
207 maj_stat = get_int32(minor_status, value, &offset);
208 if (maj_stat != GSS_S_COMPLETE)
209 return maj_stat;
210
211 t = time(NULL) + offset;
212
213 krb5_set_real_time(context, t, 0);
214
215 *minor_status = 0;
216 return GSS_S_COMPLETE;
217 } else if (gss_oid_equal(desired_object, GSS_KRB5_GET_TIME_OFFSET_X)) {
218 krb5_timestamp sec;
219 int32_t usec;
220 time_t t;
221
222 t = time(NULL);
223
224 krb5_us_timeofday (context, &sec, &usec);
225
226 maj_stat = set_int32(minor_status, value, sec - t);
227 if (maj_stat != GSS_S_COMPLETE)
228 return maj_stat;
229
230 *minor_status = 0;
231 return GSS_S_COMPLETE;
232 } else if (gss_oid_equal(desired_object, GSS_KRB5_PLUGIN_REGISTER_X)) {
233 struct gsskrb5_krb5_plugin c;
234
235 if (value->length != sizeof(c)) {
236 *minor_status = EINVAL;
237 return GSS_S_FAILURE;
238 }
239 memcpy(&c, value->value, sizeof(c));
240 krb5_plugin_register(context, c.type, c.name, c.symbol);
241
242 *minor_status = 0;
243 return GSS_S_COMPLETE;
244 }
245
246 *minor_status = EINVAL;
247 return GSS_S_FAILURE;
248 }
249