release/src/router/openssl/crypto/engine/tb_asnmth.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 "asn1_locl.h"
  57 #include <openssl/evp.h>
  58
  59 /* If this symbol is defined then ENGINE_get_pkey_asn1_meth_engine(), the
  60  * function that is used by EVP to hook in pkey_asn1_meth code and cache
  61  * defaults (etc), will display brief debugging summaries to stderr with the
  62  * 'nid'. */
  63 /* #define ENGINE_PKEY_ASN1_METH_DEBUG */
  64
  65 static ENGINE_TABLE *pkey_asn1_meth_table = NULL;
  66
  67 void ENGINE_unregister_pkey_asn1_meths(ENGINE *e)
  68         {
  69         engine_table_unregister(&pkey_asn1_meth_table, e);
  70         }
  71
  72 static void engine_unregister_all_pkey_asn1_meths(void)
  73         {
  74         engine_table_cleanup(&pkey_asn1_meth_table);
  75         }
  76
  77 int ENGINE_register_pkey_asn1_meths(ENGINE *e)
  78         {
  79         if(e->pkey_asn1_meths)
  80                 {
  81                 const int *nids;
  82                 int num_nids = e->pkey_asn1_meths(e, NULL, &nids, 0);
  83                 if(num_nids > 0)
  84                         return engine_table_register(&pkey_asn1_meth_table,
  85                                 engine_unregister_all_pkey_asn1_meths, e, nids,
  86                                         num_nids, 0);
  87                 }
  88         return 1;
  89         }
  90
  91 void ENGINE_register_all_pkey_asn1_meths(void)
  92         {
  93         ENGINE *e;
  94
  95         for(e=ENGINE_get_first() ; e ; e=ENGINE_get_next(e))
  96                 ENGINE_register_pkey_asn1_meths(e);
  97         }
  98
  99 int ENGINE_set_default_pkey_asn1_meths(ENGINE *e)
 100         {
 101         if(e->pkey_asn1_meths)
 102                 {
 103                 const int *nids;
 104                 int num_nids = e->pkey_asn1_meths(e, NULL, &nids, 0);
 105                 if(num_nids > 0)
 106                         return engine_table_register(&pkey_asn1_meth_table,
 107                                 engine_unregister_all_pkey_asn1_meths, e, nids,
 108                                         num_nids, 1);
 109                 }
 110         return 1;
 111         }
 112
 113 /* Exposed API function to get a functional reference from the implementation
 114  * table (ie. try to get a functional reference from the tabled structural
 115  * references) for a given pkey_asn1_meth 'nid' */
 116 ENGINE *ENGINE_get_pkey_asn1_meth_engine(int nid)
 117         {
 118         return engine_table_select(&pkey_asn1_meth_table, nid);
 119         }
 120
 121 /* Obtains a pkey_asn1_meth implementation from an ENGINE functional reference */
 122 const EVP_PKEY_ASN1_METHOD *ENGINE_get_pkey_asn1_meth(ENGINE *e, int nid)
 123         {
 124         EVP_PKEY_ASN1_METHOD *ret;
 125         ENGINE_PKEY_ASN1_METHS_PTR fn = ENGINE_get_pkey_asn1_meths(e);
 126         if(!fn || !fn(e, &ret, NULL, nid))
 127                 {
 128                 ENGINEerr(ENGINE_F_ENGINE_GET_PKEY_ASN1_METH,
 129                                 ENGINE_R_UNIMPLEMENTED_PUBLIC_KEY_METHOD);
 130                 return NULL;
 131                 }
 132         return ret;
 133         }
 134
 135 /* Gets the pkey_asn1_meth callback from an ENGINE structure */
 136 ENGINE_PKEY_ASN1_METHS_PTR ENGINE_get_pkey_asn1_meths(const ENGINE *e)
 137         {
 138         return e->pkey_asn1_meths;
 139         }
 140
 141 /* Sets the pkey_asn1_meth callback in an ENGINE structure */
 142 int ENGINE_set_pkey_asn1_meths(ENGINE *e, ENGINE_PKEY_ASN1_METHS_PTR f)
 143         {
 144         e->pkey_asn1_meths = f;
 145         return 1;
 146         }
 147
 148 /* Internal function to free up EVP_PKEY_ASN1_METHOD structures before an
 149  * ENGINE is destroyed
 150  */
 151
 152 void engine_pkey_asn1_meths_free(ENGINE *e)
 153         {
 154         int i;
 155         EVP_PKEY_ASN1_METHOD *pkm;
 156         if (e->pkey_asn1_meths)
 157                 {
 158                 const int *pknids;
 159                 int npknids;
 160                 npknids = e->pkey_asn1_meths(e, NULL, &pknids, 0);
 161                 for (i = 0; i < npknids; i++)
 162                         {
 163                         if (e->pkey_asn1_meths(e, &pkm, NULL, pknids[i]))
 164                                 {
 165                                 EVP_PKEY_asn1_free(pkm);
 166                                 }
 167                         }
 168                 }
 169         }
 170
 171 /* Find a method based on a string. This does a linear search through
 172  * all implemented algorithms. This is OK in practice because only
 173  * a small number of algorithms are likely to be implemented in an engine
 174  * and it is not used for speed critical operations.
 175  */
 176
 177 const EVP_PKEY_ASN1_METHOD *ENGINE_get_pkey_asn1_meth_str(ENGINE *e,
 178                                         const char *str, int len)
 179         {
 180         int i, nidcount;
 181         const int *nids;
 182         EVP_PKEY_ASN1_METHOD *ameth;
 183         if (!e->pkey_asn1_meths)
 184                 return NULL;
 185         if (len == -1)
 186                 len = strlen(str);
 187         nidcount = e->pkey_asn1_meths(e, NULL, &nids, 0);
 188         for (i = 0; i < nidcount; i++)
 189                 {
 190                 e->pkey_asn1_meths(e, &ameth, NULL, nids[i]);
 191                 if (((int)strlen(ameth->pem_str) == len) &&
 192                                         !strncasecmp(ameth->pem_str, str, len))
 193                         return ameth;
 194                 }
 195         return NULL;
 196         }
 197
 198 typedef struct
 199         {
 200         ENGINE *e;
 201         const EVP_PKEY_ASN1_METHOD *ameth;
 202         const char *str;
 203         int len;
 204         } ENGINE_FIND_STR;
 205
 206 static void look_str_cb(int nid, STACK_OF(ENGINE) *sk, ENGINE *def, void *arg)
 207         {
 208         ENGINE_FIND_STR *lk = arg;
 209         int i;
 210         if (lk->ameth)
 211                 return;
 212         for (i = 0; i < sk_ENGINE_num(sk); i++)
 213                 {
 214                 ENGINE *e = sk_ENGINE_value(sk, i);
 215                 EVP_PKEY_ASN1_METHOD *ameth;
 216                 e->pkey_asn1_meths(e, &ameth, NULL, nid);
 217                 if (((int)strlen(ameth->pem_str) == lk->len) &&
 218                                 !strncasecmp(ameth->pem_str, lk->str, lk->len))
 219                         {
 220                         lk->e = e;
 221                         lk->ameth = ameth;
 222                         return;
 223                         }
 224                 }
 225         }
 226
 227 const EVP_PKEY_ASN1_METHOD *ENGINE_pkey_asn1_find_str(ENGINE **pe,
 228                                         const char *str, int len)
 229         {
 230         ENGINE_FIND_STR fstr;
 231         fstr.e = NULL;
 232         fstr.ameth = NULL;
 233         fstr.str = str;
 234         fstr.len = len;
 235         CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
 236         engine_table_doall(pkey_asn1_meth_table, look_str_cb, &fstr);
 237         /* If found obtain a structural reference to engine */
 238         if (fstr.e)
 239                 {
 240                 fstr.e->struct_ref++;
 241                 engine_ref_debug(fstr.e, 0, 1)
 242                 }
 243         *pe = fstr.e;
 244         CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
 245         return fstr.ameth;
 246         }