release/src/router/openssl/crypto/engine/tb_pkmeth.c

   1 /* ====================================================================
   2  * Copyright (c) 2006 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
  24  *    licensing@OpenSSL.org.
  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  * (eay@cryptsoft.com).  This product includes software written by Tim
  51  * Hudson (tjh@cryptsoft.com).
  52  *
  53  */
  54
  55 #include "eng_int.h"
  56 #include <openssl/evp.h>
  57
  58 /* If this symbol is defined then ENGINE_get_pkey_meth_engine(), the function
  59  * that is used by EVP to hook in pkey_meth code and cache defaults (etc), will
  60  * display brief debugging summaries to stderr with the 'nid'. */
  61 /* #define ENGINE_PKEY_METH_DEBUG */
  62
  63 static ENGINE_TABLE *pkey_meth_table = NULL;
  64
  65 void ENGINE_unregister_pkey_meths(ENGINE *e)
  66         {
  67         engine_table_unregister(&pkey_meth_table, e);
  68         }
  69
  70 static void engine_unregister_all_pkey_meths(void)
  71         {
  72         engine_table_cleanup(&pkey_meth_table);
  73         }
  74
  75 int ENGINE_register_pkey_meths(ENGINE *e)
  76         {
  77         if(e->pkey_meths)
  78                 {
  79                 const int *nids;
  80                 int num_nids = e->pkey_meths(e, NULL, &nids, 0);
  81                 if(num_nids > 0)
  82                         return engine_table_register(&pkey_meth_table,
  83                                 engine_unregister_all_pkey_meths, e, nids,
  84                                         num_nids, 0);
  85                 }
  86         return 1;
  87         }
  88
  89 void ENGINE_register_all_pkey_meths()
  90         {
  91         ENGINE *e;
  92
  93         for(e=ENGINE_get_first() ; e ; e=ENGINE_get_next(e))
  94                 ENGINE_register_pkey_meths(e);
  95         }
  96
  97 int ENGINE_set_default_pkey_meths(ENGINE *e)
  98         {
  99         if(e->pkey_meths)
 100                 {
 101                 const int *nids;
 102                 int num_nids = e->pkey_meths(e, NULL, &nids, 0);
 103                 if(num_nids > 0)
 104                         return engine_table_register(&pkey_meth_table,
 105                                 engine_unregister_all_pkey_meths, e, nids,
 106                                         num_nids, 1);
 107                 }
 108         return 1;
 109         }
 110
 111 /* Exposed API function to get a functional reference from the implementation
 112  * table (ie. try to get a functional reference from the tabled structural
 113  * references) for a given pkey_meth 'nid' */
 114 ENGINE *ENGINE_get_pkey_meth_engine(int nid)
 115         {
 116         return engine_table_select(&pkey_meth_table, nid);
 117         }
 118
 119 /* Obtains a pkey_meth implementation from an ENGINE functional reference */
 120 const EVP_PKEY_METHOD *ENGINE_get_pkey_meth(ENGINE *e, int nid)
 121         {
 122         EVP_PKEY_METHOD *ret;
 123         ENGINE_PKEY_METHS_PTR fn = ENGINE_get_pkey_meths(e);
 124         if(!fn || !fn(e, &ret, NULL, nid))
 125                 {
 126                 ENGINEerr(ENGINE_F_ENGINE_GET_PKEY_METH,
 127                                 ENGINE_R_UNIMPLEMENTED_PUBLIC_KEY_METHOD);
 128                 return NULL;
 129                 }
 130         return ret;
 131         }
 132
 133 /* Gets the pkey_meth callback from an ENGINE structure */
 134 ENGINE_PKEY_METHS_PTR ENGINE_get_pkey_meths(const ENGINE *e)
 135         {
 136         return e->pkey_meths;
 137         }
 138
 139 /* Sets the pkey_meth callback in an ENGINE structure */
 140 int ENGINE_set_pkey_meths(ENGINE *e, ENGINE_PKEY_METHS_PTR f)
 141         {
 142         e->pkey_meths = f;
 143         return 1;
 144         }
 145
 146 /* Internal function to free up EVP_PKEY_METHOD structures before an
 147  * ENGINE is destroyed
 148  */
 149
 150 void engine_pkey_meths_free(ENGINE *e)
 151         {
 152         int i;
 153         EVP_PKEY_METHOD *pkm;
 154         if (e->pkey_meths)
 155                 {
 156                 const int *pknids;
 157                 int npknids;
 158                 npknids = e->pkey_meths(e, NULL, &pknids, 0);
 159                 for (i = 0; i < npknids; i++)
 160                         {
 161                         if (e->pkey_meths(e, &pkm, NULL, pknids[i]))
 162                                 {
 163                                 EVP_PKEY_meth_free(pkm);
 164                                 }
 165                         }
 166                 }
 167         }