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 /* We need to use some engine deprecated APIs */
  11 #define OPENSSL_SUPPRESS_DEPRECATED
  12
  13 #include "eng_local.h"
  14
  15 static ENGINE_TABLE *dsa_table = NULL;
  16 static const int dummy_nid = 1;
  17
  18 void ENGINE_unregister_DSA(ENGINE *e)
  19 {
  20     engine_table_unregister(&dsa_table, e);
  21 }
  22
  23 static void engine_unregister_all_DSA(void)
  24 {
  25     engine_table_cleanup(&dsa_table);
  26 }
  27
  28 int ENGINE_register_DSA(ENGINE *e)
  29 {
  30     if (e->dsa_meth)
  31         return engine_table_register(&dsa_table,
  32                                      engine_unregister_all_DSA, e, &dummy_nid,
  33                                      1, 0);
  34     return 1;
  35 }
  36
  37 void ENGINE_register_all_DSA(void)
  38 {
  39     ENGINE *e;
  40
  41     for (e = ENGINE_get_first(); e; e = ENGINE_get_next(e))
  42         ENGINE_register_DSA(e);
  43 }
  44
  45 int ENGINE_set_default_DSA(ENGINE *e)
  46 {
  47     if (e->dsa_meth)
  48         return engine_table_register(&dsa_table,
  49                                      engine_unregister_all_DSA, 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_DSA(void)
  60 {
  61     return engine_table_select(&dsa_table, dummy_nid);
  62 }
  63
  64 /* Obtains an DSA implementation from an ENGINE functional reference */
  65 const DSA_METHOD *ENGINE_get_DSA(const ENGINE *e)
  66 {
  67     return e->dsa_meth;
  68 }
  69
  70 /* Sets an DSA implementation in an ENGINE structure */
  71 int ENGINE_set_DSA(ENGINE *e, const DSA_METHOD *dsa_meth)
  72 {
  73     e->dsa_meth = dsa_meth;
  74     return 1;
  75 }