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