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      1 /*
      2  * Copyright 2015-2021 The OpenSSL Project Authors. All Rights Reserved.
      3  *
      4  * Licensed under the Apache License 2.0 (the "License").  You may not use
      5  * this file except in compliance with the License.  You can obtain a copy
      6  * in the file LICENSE in the source distribution or at
      7  * https://www.openssl.org/source/license.html
      8  */
      9 
     10 /* We need to use some engine deprecated APIs */
     11 #define OPENSSL_SUPPRESS_DEPRECATED
     12 
     13 #include "eng_local.h"
     14 
     15 static ENGINE_TABLE *dh_table = NULL;
     16 static const int dummy_nid = 1;
     17 
     18 void ENGINE_unregister_EC(ENGINE *e)
     19 {
     20     engine_table_unregister(&dh_table, e);
     21 }
     22 
     23 static void engine_unregister_all_EC(void)
     24 {
     25     engine_table_cleanup(&dh_table);
     26 }
     27 
     28 int ENGINE_register_EC(ENGINE *e)
     29 {
     30     if (e->ec_meth != NULL)
     31         return engine_table_register(&dh_table,
     32             engine_unregister_all_EC, e, &dummy_nid,
     33             1, 0);
     34     return 1;
     35 }
     36 
     37 void ENGINE_register_all_EC(void)
     38 {
     39     ENGINE *e;
     40 
     41     for (e = ENGINE_get_first(); e; e = ENGINE_get_next(e))
     42         ENGINE_register_EC(e);
     43 }
     44 
     45 int ENGINE_set_default_EC(ENGINE *e)
     46 {
     47     if (e->ec_meth != NULL)
     48         return engine_table_register(&dh_table,
     49             engine_unregister_all_EC, e, &dummy_nid,
     50             1, 1);
     51     return 1;
     52 }
     53 
     54 /*
     55  * Exposed API function to get a functional reference from the implementation
     56  * table (ie. try to get a functional reference from the tabled structural
     57  * references).
     58  */
     59 ENGINE *ENGINE_get_default_EC(void)
     60 {
     61     return ossl_engine_table_select(&dh_table, dummy_nid,
     62         OPENSSL_FILE, OPENSSL_LINE);
     63 }
     64 
     65 /* Obtains an EC_KEY implementation from an ENGINE functional reference */
     66 const EC_KEY_METHOD *ENGINE_get_EC(const ENGINE *e)
     67 {
     68     return e->ec_meth;
     69 }
     70 
     71 /* Sets an EC_KEY implementation in an ENGINE structure */
     72 int ENGINE_set_EC(ENGINE *e, const EC_KEY_METHOD *ec_meth)
     73 {
     74     e->ec_meth = ec_meth;
     75     return 1;
     76 }
     77