OpenSSL  1.0.1c
 All Classes Files Functions Variables Typedefs Enumerations Enumerator Macros
tb_dsa.c
Go to the documentation of this file.
1 /* ====================================================================
2  * Copyright (c) 2000 The OpenSSL Project. All rights reserved.
3  *
4  * Redistribution and use in source and binary forms, with or without
5  * modification, are permitted provided that the following conditions
6  * are met:
7  *
8  * 1. Redistributions of source code must retain the above copyright
9  * notice, this list of conditions and the following disclaimer.
10  *
11  * 2. Redistributions in binary form must reproduce the above copyright
12  * notice, this list of conditions and the following disclaimer in
13  * the documentation and/or other materials provided with the
14  * distribution.
15  *
16  * 3. All advertising materials mentioning features or use of this
17  * software must display the following acknowledgment:
18  * "This product includes software developed by the OpenSSL Project
19  * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
20  *
21  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
22  * endorse or promote products derived from this software without
23  * prior written permission. For written permission, please contact
25  *
26  * 5. Products derived from this software may not be called "OpenSSL"
27  * nor may "OpenSSL" appear in their names without prior written
28  * permission of the OpenSSL Project.
29  *
30  * 6. Redistributions of any form whatsoever must retain the following
31  * acknowledgment:
32  * "This product includes software developed by the OpenSSL Project
33  * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
34  *
35  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
36  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
37  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
38  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
39  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
40  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
41  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
42  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
43  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
44  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
45  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
46  * OF THE POSSIBILITY OF SUCH DAMAGE.
47  * ====================================================================
48  *
49  * This product includes cryptographic software written by Eric Young
50  * ([email protected]). This product includes software written by Tim
51  * Hudson ([email protected]).
52  *
53  */
54 
55 #include "eng_int.h"
56 
57 /* If this symbol is defined then ENGINE_get_default_DSA(), the function that is
58  * used by DSA to hook in implementation code and cache defaults (etc), will
59  * display brief debugging summaries to stderr with the 'nid'. */
60 /* #define ENGINE_DSA_DEBUG */
61 
62 static ENGINE_TABLE *dsa_table = NULL;
63 static const int dummy_nid = 1;
64 
66  {
67  engine_table_unregister(&dsa_table, e);
68  }
69 
70 static void engine_unregister_all_DSA(void)
71  {
72  engine_table_cleanup(&dsa_table);
73  }
74 
76  {
77  if(e->dsa_meth)
78  return engine_table_register(&dsa_table,
79  engine_unregister_all_DSA, e, &dummy_nid, 1, 0);
80  return 1;
81  }
82 
84  {
85  ENGINE *e;
86 
87  for(e=ENGINE_get_first() ; e ; e=ENGINE_get_next(e))
89  }
90 
92  {
93  if(e->dsa_meth)
94  return engine_table_register(&dsa_table,
95  engine_unregister_all_DSA, e, &dummy_nid, 1, 1);
96  return 1;
97  }
98 
99 /* Exposed API function to get a functional reference from the implementation
100  * table (ie. try to get a functional reference from the tabled structural
101  * references). */
103  {
104  return engine_table_select(&dsa_table, dummy_nid);
105  }
106 
107 /* Obtains an DSA implementation from an ENGINE functional reference */
109  {
110  return e->dsa_meth;
111  }
112 
113 /* Sets an DSA implementation in an ENGINE structure */
114 int ENGINE_set_DSA(ENGINE *e, const DSA_METHOD *dsa_meth)
115  {
116  e->dsa_meth = dsa_meth;
117  return 1;
118  }