xref: /minix3/crypto/external/bsd/heimdal/dist/lib/gssapi/krb5/import_sec_context.c (revision ebfedea0ce5bbe81e252ddf32d732e40fb633fae)
1 /*	$NetBSD: import_sec_context.c,v 1.1.1.1 2011/04/13 18:14:45 elric 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     if (krb5_ret_int32 (sp, &tmp))
198 	goto failure;
199     ctx->lifetime = tmp;
200 
201     ret = _gssapi_msg_order_import(minor_status, sp, &ctx->order);
202     if (ret)
203         goto failure;
204 
205     krb5_storage_free (sp);
206 
207     _gsskrb5i_is_cfx(context, ctx, (ctx->more_flags & LOCAL) == 0);
208 
209     *context_handle = (gss_ctx_id_t)ctx;
210 
211     return GSS_S_COMPLETE;
212 
213 failure:
214     krb5_auth_con_free (context,
215 			ctx->auth_context);
216     if (ctx->source != NULL)
217 	krb5_free_principal(context, ctx->source);
218     if (ctx->target != NULL)
219 	krb5_free_principal(context, ctx->target);
220     if (localp)
221 	krb5_free_address (context, localp);
222     if (remotep)
223 	krb5_free_address (context, remotep);
224     if(ctx->order)
225 	_gssapi_msg_order_destroy(&ctx->order);
226     HEIMDAL_MUTEX_destroy(&ctx->ctx_id_mutex);
227     krb5_storage_free (sp);
228     free (ctx);
229     *context_handle = GSS_C_NO_CONTEXT;
230     return ret;
231 }
232