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 "gsskrb5_locl.h"
38
39 static OM_uint32
get_bool(OM_uint32 * minor_status,const gss_buffer_t value,int * flag)40 get_bool(OM_uint32 *minor_status,
41 const gss_buffer_t value,
42 int *flag)
43 {
44 if (value->value == NULL || value->length != 1) {
45 *minor_status = EINVAL;
46 return GSS_S_FAILURE;
47 }
48 *flag = *((const char *)value->value) != 0;
49 return GSS_S_COMPLETE;
50 }
51
52 static OM_uint32
get_string(OM_uint32 * minor_status,const gss_buffer_t value,char ** str)53 get_string(OM_uint32 *minor_status,
54 const gss_buffer_t value,
55 char **str)
56 {
57 if (value == NULL || value->length == 0) {
58 *str = NULL;
59 } else {
60 *str = malloc(value->length + 1);
61 if (*str == NULL) {
62 *minor_status = 0;
63 return GSS_S_UNAVAILABLE;
64 }
65 memcpy(*str, value->value, value->length);
66 (*str)[value->length] = '\0';
67 }
68 return GSS_S_COMPLETE;
69 }
70
71 static OM_uint32
get_int32(OM_uint32 * minor_status,const gss_buffer_t value,OM_uint32 * ret)72 get_int32(OM_uint32 *minor_status,
73 const gss_buffer_t value,
74 OM_uint32 *ret)
75 {
76 *minor_status = 0;
77 if (value == NULL || value->length == 0)
78 *ret = 0;
79 else if (value->length == sizeof(*ret))
80 memcpy(ret, value->value, sizeof(*ret));
81 else
82 return GSS_S_UNAVAILABLE;
83
84 return GSS_S_COMPLETE;
85 }
86
87 static OM_uint32
set_int32(OM_uint32 * minor_status,const gss_buffer_t value,OM_uint32 set)88 set_int32(OM_uint32 *minor_status,
89 const gss_buffer_t value,
90 OM_uint32 set)
91 {
92 *minor_status = 0;
93 if (value->length == sizeof(set))
94 memcpy(value->value, &set, sizeof(set));
95 else
96 return GSS_S_UNAVAILABLE;
97
98 return GSS_S_COMPLETE;
99 }
100
101 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)102 _gsskrb5_set_sec_context_option
103 (OM_uint32 *minor_status,
104 gss_ctx_id_t *context_handle,
105 const gss_OID desired_object,
106 const gss_buffer_t value)
107 {
108 krb5_context context;
109 OM_uint32 maj_stat;
110
111 GSSAPI_KRB5_INIT (&context);
112
113 if (value == GSS_C_NO_BUFFER) {
114 *minor_status = EINVAL;
115 return GSS_S_FAILURE;
116 }
117
118 if (gss_oid_equal(desired_object, GSS_KRB5_COMPAT_DES3_MIC_X)) {
119 gsskrb5_ctx ctx;
120 int flag;
121
122 if (*context_handle == GSS_C_NO_CONTEXT) {
123 *minor_status = EINVAL;
124 return GSS_S_NO_CONTEXT;
125 }
126
127 maj_stat = get_bool(minor_status, value, &flag);
128 if (maj_stat != GSS_S_COMPLETE)
129 return maj_stat;
130
131 ctx = (gsskrb5_ctx)*context_handle;
132 HEIMDAL_MUTEX_lock(&ctx->ctx_id_mutex);
133 if (flag)
134 ctx->more_flags |= COMPAT_OLD_DES3;
135 else
136 ctx->more_flags &= ~COMPAT_OLD_DES3;
137 ctx->more_flags |= COMPAT_OLD_DES3_SELECTED;
138 HEIMDAL_MUTEX_unlock(&ctx->ctx_id_mutex);
139 return GSS_S_COMPLETE;
140 } else if (gss_oid_equal(desired_object, GSS_KRB5_SET_DNS_CANONICALIZE_X)) {
141 int flag;
142
143 maj_stat = get_bool(minor_status, value, &flag);
144 if (maj_stat != GSS_S_COMPLETE)
145 return maj_stat;
146
147 krb5_set_dns_canonicalize_hostname(context, flag);
148 return GSS_S_COMPLETE;
149
150 } else if (gss_oid_equal(desired_object, GSS_KRB5_REGISTER_ACCEPTOR_IDENTITY_X)) {
151 char *str;
152
153 maj_stat = get_string(minor_status, value, &str);
154 if (maj_stat != GSS_S_COMPLETE)
155 return maj_stat;
156
157 maj_stat = _gsskrb5_register_acceptor_identity(minor_status, str);
158 free(str);
159
160 return maj_stat;
161
162 } else if (gss_oid_equal(desired_object, GSS_KRB5_SET_DEFAULT_REALM_X)) {
163 char *str;
164
165 maj_stat = get_string(minor_status, value, &str);
166 if (maj_stat != GSS_S_COMPLETE)
167 return maj_stat;
168 if (str == NULL) {
169 *minor_status = 0;
170 return GSS_S_CALL_INACCESSIBLE_READ;
171 }
172
173 krb5_set_default_realm(context, str);
174 free(str);
175
176 *minor_status = 0;
177 return GSS_S_COMPLETE;
178
179 } else if (gss_oid_equal(desired_object, GSS_KRB5_SEND_TO_KDC_X)) {
180
181 if (value == NULL || value->length == 0) {
182 krb5_set_send_to_kdc_func(context, NULL, NULL);
183 } else {
184 struct gsskrb5_send_to_kdc c;
185
186 if (value->length != sizeof(c)) {
187 *minor_status = EINVAL;
188 return GSS_S_FAILURE;
189 }
190 memcpy(&c, value->value, sizeof(c));
191 krb5_set_send_to_kdc_func(context,
192 (krb5_send_to_kdc_func)c.func,
193 c.ptr);
194 }
195
196 *minor_status = 0;
197 return GSS_S_COMPLETE;
198 } else if (gss_oid_equal(desired_object, GSS_KRB5_CCACHE_NAME_X)) {
199 char *str;
200
201 maj_stat = get_string(minor_status, value, &str);
202 if (maj_stat != GSS_S_COMPLETE)
203 return maj_stat;
204 if (str == NULL) {
205 *minor_status = 0;
206 return GSS_S_CALL_INACCESSIBLE_READ;
207 }
208
209 *minor_status = krb5_cc_set_default_name(context, str);
210 free(str);
211 if (*minor_status)
212 return GSS_S_FAILURE;
213
214 return GSS_S_COMPLETE;
215 } else if (gss_oid_equal(desired_object, GSS_KRB5_SET_TIME_OFFSET_X)) {
216 OM_uint32 offset;
217 time_t t;
218
219 maj_stat = get_int32(minor_status, value, &offset);
220 if (maj_stat != GSS_S_COMPLETE)
221 return maj_stat;
222
223 t = time(NULL) + offset;
224
225 krb5_set_real_time(context, t, 0);
226
227 *minor_status = 0;
228 return GSS_S_COMPLETE;
229 } else if (gss_oid_equal(desired_object, GSS_KRB5_GET_TIME_OFFSET_X)) {
230 krb5_timestamp sec;
231 int32_t usec;
232 time_t t;
233
234 t = time(NULL);
235
236 krb5_us_timeofday (context, &sec, &usec);
237
238 maj_stat = set_int32(minor_status, value, sec - t);
239 if (maj_stat != GSS_S_COMPLETE)
240 return maj_stat;
241
242 *minor_status = 0;
243 return GSS_S_COMPLETE;
244 } else if (gss_oid_equal(desired_object, GSS_KRB5_PLUGIN_REGISTER_X)) {
245 struct gsskrb5_krb5_plugin c;
246
247 if (value->length != sizeof(c)) {
248 *minor_status = EINVAL;
249 return GSS_S_FAILURE;
250 }
251 memcpy(&c, value->value, sizeof(c));
252 krb5_plugin_register(context, c.type, c.name, c.symbol);
253
254 *minor_status = 0;
255 return GSS_S_COMPLETE;
256 }
257
258 *minor_status = EINVAL;
259 return GSS_S_FAILURE;
260 }
261