1 /* $NetBSD: import_sec_context.c,v 1.2 2017/01/28 21:31:46 christos Exp $ */
2
3 /*
4 * Copyright (c) 1999 - 2003 Kungliga Tekniska Högskolan
5 * (Royal Institute of Technology, Stockholm, Sweden).
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * 3. Neither the name of the Institute nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36 #include "gsskrb5_locl.h"
37
38 OM_uint32 GSSAPI_CALLCONV
_gsskrb5_import_sec_context(OM_uint32 * minor_status,const gss_buffer_t interprocess_token,gss_ctx_id_t * context_handle)39 _gsskrb5_import_sec_context (
40 OM_uint32 * minor_status,
41 const gss_buffer_t interprocess_token,
42 gss_ctx_id_t * context_handle
43 )
44 {
45 OM_uint32 ret = GSS_S_FAILURE;
46 krb5_context context;
47 krb5_error_code kret;
48 krb5_storage *sp;
49 krb5_auth_context ac;
50 krb5_address local, remote;
51 krb5_address *localp, *remotep;
52 krb5_data data;
53 gss_buffer_desc buffer;
54 krb5_keyblock keyblock;
55 int32_t flags, tmp;
56 gsskrb5_ctx ctx;
57 gss_name_t name;
58
59 GSSAPI_KRB5_INIT (&context);
60
61 *context_handle = GSS_C_NO_CONTEXT;
62
63 localp = remotep = NULL;
64
65 sp = krb5_storage_from_mem (interprocess_token->value,
66 interprocess_token->length);
67 if (sp == NULL) {
68 *minor_status = ENOMEM;
69 return GSS_S_FAILURE;
70 }
71
72 ctx = calloc(1, sizeof(*ctx));
73 if (ctx == NULL) {
74 *minor_status = ENOMEM;
75 krb5_storage_free (sp);
76 return GSS_S_FAILURE;
77 }
78 HEIMDAL_MUTEX_init(&ctx->ctx_id_mutex);
79
80 kret = krb5_auth_con_init (context,
81 &ctx->auth_context);
82 if (kret) {
83 *minor_status = kret;
84 ret = GSS_S_FAILURE;
85 goto failure;
86 }
87
88 /* flags */
89
90 *minor_status = 0;
91
92 if (krb5_ret_int32 (sp, &flags) != 0)
93 goto failure;
94
95 /* retrieve the auth context */
96
97 ac = ctx->auth_context;
98 if (krb5_ret_int32 (sp, &tmp) != 0)
99 goto failure;
100 ac->flags = tmp;
101 if (flags & SC_LOCAL_ADDRESS) {
102 if (krb5_ret_address (sp, localp = &local) != 0)
103 goto failure;
104 }
105
106 if (flags & SC_REMOTE_ADDRESS) {
107 if (krb5_ret_address (sp, remotep = &remote) != 0)
108 goto failure;
109 }
110
111 krb5_auth_con_setaddrs (context, ac, localp, remotep);
112 if (localp)
113 krb5_free_address (context, localp);
114 if (remotep)
115 krb5_free_address (context, remotep);
116 localp = remotep = NULL;
117
118 if (krb5_ret_int16 (sp, &ac->local_port) != 0)
119 goto failure;
120
121 if (krb5_ret_int16 (sp, &ac->remote_port) != 0)
122 goto failure;
123 if (flags & SC_KEYBLOCK) {
124 if (krb5_ret_keyblock (sp, &keyblock) != 0)
125 goto failure;
126 krb5_auth_con_setkey (context, ac, &keyblock);
127 krb5_free_keyblock_contents (context, &keyblock);
128 }
129 if (flags & SC_LOCAL_SUBKEY) {
130 if (krb5_ret_keyblock (sp, &keyblock) != 0)
131 goto failure;
132 krb5_auth_con_setlocalsubkey (context, ac, &keyblock);
133 krb5_free_keyblock_contents (context, &keyblock);
134 }
135 if (flags & SC_REMOTE_SUBKEY) {
136 if (krb5_ret_keyblock (sp, &keyblock) != 0)
137 goto failure;
138 krb5_auth_con_setremotesubkey (context, ac, &keyblock);
139 krb5_free_keyblock_contents (context, &keyblock);
140 }
141 if (krb5_ret_uint32 (sp, &ac->local_seqnumber))
142 goto failure;
143 if (krb5_ret_uint32 (sp, &ac->remote_seqnumber))
144 goto failure;
145
146 if (krb5_ret_int32 (sp, &tmp) != 0)
147 goto failure;
148 ac->keytype = tmp;
149 if (krb5_ret_int32 (sp, &tmp) != 0)
150 goto failure;
151 ac->cksumtype = tmp;
152
153 /* names */
154
155 if (krb5_ret_data (sp, &data))
156 goto failure;
157 buffer.value = data.data;
158 buffer.length = data.length;
159
160 ret = _gsskrb5_import_name (minor_status, &buffer, GSS_C_NT_EXPORT_NAME,
161 &name);
162 if (ret) {
163 ret = _gsskrb5_import_name (minor_status, &buffer, GSS_C_NO_OID,
164 &name);
165 if (ret) {
166 krb5_data_free (&data);
167 goto failure;
168 }
169 }
170 ctx->source = (krb5_principal)name;
171 krb5_data_free (&data);
172
173 if (krb5_ret_data (sp, &data) != 0)
174 goto failure;
175 buffer.value = data.data;
176 buffer.length = data.length;
177
178 ret = _gsskrb5_import_name (minor_status, &buffer, GSS_C_NT_EXPORT_NAME,
179 &name);
180 if (ret) {
181 ret = _gsskrb5_import_name (minor_status, &buffer, GSS_C_NO_OID,
182 &name);
183 if (ret) {
184 krb5_data_free (&data);
185 goto failure;
186 }
187 }
188 ctx->target = (krb5_principal)name;
189 krb5_data_free (&data);
190
191 if (krb5_ret_int32 (sp, &tmp))
192 goto failure;
193 ctx->flags = tmp;
194 if (krb5_ret_int32 (sp, &tmp))
195 goto failure;
196 ctx->more_flags = tmp;
197 /*
198 * XXX endtime should be a 64-bit int, but we don't have
199 * krb5_ret_int64() yet.
200 */
201 if (krb5_ret_int32 (sp, &tmp))
202 goto failure;
203 ctx->endtime = tmp;
204
205 ret = _gssapi_msg_order_import(minor_status, sp, &ctx->order);
206 if (ret)
207 goto failure;
208
209 krb5_storage_free (sp);
210
211 _gsskrb5i_is_cfx(context, ctx, (ctx->more_flags & LOCAL) == 0);
212
213 *context_handle = (gss_ctx_id_t)ctx;
214
215 return GSS_S_COMPLETE;
216
217 failure:
218 krb5_auth_con_free (context,
219 ctx->auth_context);
220 if (ctx->source != NULL)
221 krb5_free_principal(context, ctx->source);
222 if (ctx->target != NULL)
223 krb5_free_principal(context, ctx->target);
224 if (localp)
225 krb5_free_address (context, localp);
226 if (remotep)
227 krb5_free_address (context, remotep);
228 if(ctx->order)
229 _gssapi_msg_order_destroy(&ctx->order);
230 HEIMDAL_MUTEX_destroy(&ctx->ctx_id_mutex);
231 krb5_storage_free (sp);
232 free (ctx);
233 *context_handle = GSS_C_NO_CONTEXT;
234 return ret;
235 }
236