xref: /freebsd-src/crypto/heimdal/lib/gssapi/krb5/init.c (revision 6a068746777241722b2b32c5d0bc443a2a64d80b)
1c19800e8SDoug Rabson /*
2*ae771770SStanislav Sedov  * Copyright (c) 1997 - 2001, 2003, 2006 Kungliga Tekniska Högskolan
3c19800e8SDoug Rabson  * (Royal Institute of Technology, Stockholm, Sweden).
4c19800e8SDoug Rabson  * All rights reserved.
5c19800e8SDoug Rabson  *
6c19800e8SDoug Rabson  * Redistribution and use in source and binary forms, with or without
7c19800e8SDoug Rabson  * modification, are permitted provided that the following conditions
8c19800e8SDoug Rabson  * are met:
9c19800e8SDoug Rabson  *
10c19800e8SDoug Rabson  * 1. Redistributions of source code must retain the above copyright
11c19800e8SDoug Rabson  *    notice, this list of conditions and the following disclaimer.
12c19800e8SDoug Rabson  *
13c19800e8SDoug Rabson  * 2. Redistributions in binary form must reproduce the above copyright
14c19800e8SDoug Rabson  *    notice, this list of conditions and the following disclaimer in the
15c19800e8SDoug Rabson  *    documentation and/or other materials provided with the distribution.
16c19800e8SDoug Rabson  *
17c19800e8SDoug Rabson  * 3. Neither the name of the Institute nor the names of its contributors
18c19800e8SDoug Rabson  *    may be used to endorse or promote products derived from this software
19c19800e8SDoug Rabson  *    without specific prior written permission.
20c19800e8SDoug Rabson  *
21c19800e8SDoug Rabson  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
22c19800e8SDoug Rabson  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23c19800e8SDoug Rabson  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24c19800e8SDoug Rabson  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
25c19800e8SDoug Rabson  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26c19800e8SDoug Rabson  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27c19800e8SDoug Rabson  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28c19800e8SDoug Rabson  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29c19800e8SDoug Rabson  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30c19800e8SDoug Rabson  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31c19800e8SDoug Rabson  * SUCH DAMAGE.
32c19800e8SDoug Rabson  */
33c19800e8SDoug Rabson 
34*ae771770SStanislav Sedov #include "gsskrb5_locl.h"
35c19800e8SDoug Rabson 
36c19800e8SDoug Rabson static HEIMDAL_MUTEX context_mutex = HEIMDAL_MUTEX_INITIALIZER;
37c19800e8SDoug Rabson static int created_key;
38c19800e8SDoug Rabson static HEIMDAL_thread_key context_key;
39c19800e8SDoug Rabson 
40c19800e8SDoug Rabson static void
destroy_context(void * ptr)41c19800e8SDoug Rabson destroy_context(void *ptr)
42c19800e8SDoug Rabson {
43c19800e8SDoug Rabson     krb5_context context = ptr;
44c19800e8SDoug Rabson 
45c19800e8SDoug Rabson     if (context == NULL)
46c19800e8SDoug Rabson 	return;
47c19800e8SDoug Rabson     krb5_free_context(context);
48c19800e8SDoug Rabson }
49c19800e8SDoug Rabson 
50c19800e8SDoug Rabson krb5_error_code
_gsskrb5_init(krb5_context * context)51c19800e8SDoug Rabson _gsskrb5_init (krb5_context *context)
52c19800e8SDoug Rabson {
53c19800e8SDoug Rabson     krb5_error_code ret = 0;
54c19800e8SDoug Rabson 
55c19800e8SDoug Rabson     HEIMDAL_MUTEX_lock(&context_mutex);
56c19800e8SDoug Rabson 
57c19800e8SDoug Rabson     if (!created_key) {
58c19800e8SDoug Rabson 	HEIMDAL_key_create(&context_key, destroy_context, ret);
59c19800e8SDoug Rabson 	if (ret) {
60c19800e8SDoug Rabson 	    HEIMDAL_MUTEX_unlock(&context_mutex);
61c19800e8SDoug Rabson 	    return ret;
62c19800e8SDoug Rabson 	}
63c19800e8SDoug Rabson 	created_key = 1;
64c19800e8SDoug Rabson     }
65c19800e8SDoug Rabson     HEIMDAL_MUTEX_unlock(&context_mutex);
66c19800e8SDoug Rabson 
67c19800e8SDoug Rabson     *context = HEIMDAL_getspecific(context_key);
68c19800e8SDoug Rabson     if (*context == NULL) {
69c19800e8SDoug Rabson 
70c19800e8SDoug Rabson 	ret = krb5_init_context(context);
71c19800e8SDoug Rabson 	if (ret == 0) {
72c19800e8SDoug Rabson 	    HEIMDAL_setspecific(context_key, *context, ret);
73c19800e8SDoug Rabson 	    if (ret) {
74c19800e8SDoug Rabson 		krb5_free_context(*context);
75c19800e8SDoug Rabson 		*context = NULL;
76c19800e8SDoug Rabson 	    }
77c19800e8SDoug Rabson 	}
78c19800e8SDoug Rabson     }
79c19800e8SDoug Rabson 
80c19800e8SDoug Rabson     return ret;
81c19800e8SDoug Rabson }
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