lib/libcrypto/engine/tb_ecdsa.c

   1 /* $OpenBSD: tb_ecdsa.c,v 1.4 2014/06/12 15:49:29 deraadt Exp $ */
   2 /* ====================================================================
   3  * Copyright (c) 2000-2002 The OpenSSL Project.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  *
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  *
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in
  14  *    the documentation and/or other materials provided with the
  15  *    distribution.
  16  *
  17  * 3. All advertising materials mentioning features or use of this
  18  *    software must display the following acknowledgment:
  19  *    "This product includes software developed by the OpenSSL Project
  20  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  21  *
  22  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  23  *    endorse or promote products derived from this software without
  24  *    prior written permission. For written permission, please contact
  25  *    licensing@OpenSSL.org.
  26  *
  27  * 5. Products derived from this software may not be called "OpenSSL"
  28  *    nor may "OpenSSL" appear in their names without prior written
  29  *    permission of the OpenSSL Project.
  30  *
  31  * 6. Redistributions of any form whatsoever must retain the following
  32  *    acknowledgment:
  33  *    "This product includes software developed by the OpenSSL Project
  34  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  35  *
  36  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  37  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  38  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  39  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  40  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  41  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  42  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  43  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  44  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  45  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  46  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  47  * OF THE POSSIBILITY OF SUCH DAMAGE.
  48  * ====================================================================
  49  *
  50  * This product includes cryptographic software written by Eric Young
  51  * (eay@cryptsoft.com).  This product includes software written by Tim
  52  * Hudson (tjh@cryptsoft.com).
  53  *
  54  */
  55
  56 #include "eng_int.h"
  57
  58 /* If this symbol is defined then ENGINE_get_default_ECDSA(), the function that is
  59  * used by ECDSA to hook in implementation code and cache defaults (etc), will
  60  * display brief debugging summaries to stderr with the 'nid'. */
  61 /* #define ENGINE_ECDSA_DEBUG */
  62
  63 static ENGINE_TABLE *ecdsa_table = NULL;
  64 static const int dummy_nid = 1;
  65
  66 void
  67 ENGINE_unregister_ECDSA(ENGINE *e)
  68 {
  69         engine_table_unregister(&ecdsa_table, e);
  70 }
  71
  72 static void
  73 engine_unregister_all_ECDSA(void)
  74 {
  75         engine_table_cleanup(&ecdsa_table);
  76 }
  77
  78 int
  79 ENGINE_register_ECDSA(ENGINE *e)
  80 {
  81         if (e->ecdsa_meth)
  82                 return engine_table_register(&ecdsa_table,
  83                     engine_unregister_all_ECDSA, e, &dummy_nid, 1, 0);
  84         return 1;
  85 }
  86
  87 void
  88 ENGINE_register_all_ECDSA(void)
  89 {
  90         ENGINE *e;
  91
  92         for (e = ENGINE_get_first(); e; e = ENGINE_get_next(e))
  93                 ENGINE_register_ECDSA(e);
  94 }
  95
  96 int
  97 ENGINE_set_default_ECDSA(ENGINE *e)
  98 {
  99         if (e->ecdsa_meth)
 100                 return engine_table_register(&ecdsa_table,
 101                     engine_unregister_all_ECDSA, e, &dummy_nid, 1, 1);
 102         return 1;
 103 }
 104
 105 /* Exposed API function to get a functional reference from the implementation
 106  * table (ie. try to get a functional reference from the tabled structural
 107  * references). */
 108 ENGINE *
 109 ENGINE_get_default_ECDSA(void)
 110 {
 111         return engine_table_select(&ecdsa_table, dummy_nid);
 112 }
 113
 114 /* Obtains an ECDSA implementation from an ENGINE functional reference */
 115 const ECDSA_METHOD *
 116 ENGINE_get_ECDSA(const ENGINE *e)
 117 {
 118         return e->ecdsa_meth;
 119 }
 120
 121 /* Sets an ECDSA implementation in an ENGINE structure */
 122 int
 123 ENGINE_set_ECDSA(ENGINE *e, const ECDSA_METHOD *ecdsa_meth)
 124 {
 125         e->ecdsa_meth = ecdsa_meth;
 126         return 1;
 127 }