crypto/engine/tb_dsa.c

   1 /*
   2  * Copyright 2001-2018 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 #include "eng_local.h"
  11
  12 static ENGINE_TABLE *dsa_table = NULL;
  13 static const int dummy_nid = 1;
  14
  15 void ENGINE_unregister_DSA(ENGINE *e)
  16 {
  17     engine_table_unregister(&dsa_table, e);
  18 }
  19
  20 static void engine_unregister_all_DSA(void)
  21 {
  22     engine_table_cleanup(&dsa_table);
  23 }
  24
  25 int ENGINE_register_DSA(ENGINE *e)
  26 {
  27     if (e->dsa_meth)
  28         return engine_table_register(&dsa_table,
  29                                      engine_unregister_all_DSA, e, &dummy_nid,
  30                                      1, 0);
  31     return 1;
  32 }
  33
  34 void ENGINE_register_all_DSA(void)
  35 {
  36     ENGINE *e;
  37
  38     for (e = ENGINE_get_first(); e; e = ENGINE_get_next(e))
  39         ENGINE_register_DSA(e);
  40 }
  41
  42 int ENGINE_set_default_DSA(ENGINE *e)
  43 {
  44     if (e->dsa_meth)
  45         return engine_table_register(&dsa_table,
  46                                      engine_unregister_all_DSA, e, &dummy_nid,
  47                                      1, 1);
  48     return 1;
  49 }
  50
  51 /*
  52  * Exposed API function to get a functional reference from the implementation
  53  * table (ie. try to get a functional reference from the tabled structural
  54  * references).
  55  */
  56 ENGINE *ENGINE_get_default_DSA(void)
  57 {
  58     return engine_table_select(&dsa_table, dummy_nid);
  59 }
  60
  61 /* Obtains an DSA implementation from an ENGINE functional reference */
  62 const DSA_METHOD *ENGINE_get_DSA(const ENGINE *e)
  63 {
  64     return e->dsa_meth;
  65 }
  66
  67 /* Sets an DSA implementation in an ENGINE structure */
  68 int ENGINE_set_DSA(ENGINE *e, const DSA_METHOD *dsa_meth)
  69 {
  70     e->dsa_meth = dsa_meth;
  71     return 1;
  72 }