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tb_dh.c
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54 
55 #include "eng_int.h"
56 
57 /* If this symbol is defined then ENGINE_get_default_DH(), the function that is
58  * used by DH to hook in implementation code and cache defaults (etc), will
59  * display brief debugging summaries to stderr with the 'nid'. */
60 /* #define ENGINE_DH_DEBUG */
61 
62 static ENGINE_TABLE *dh_table = NULL;
63 static const int dummy_nid = 1;
64 
66  {
67  engine_table_unregister(&dh_table, e);
68  }
69 
70 static void engine_unregister_all_DH(void)
71  {
72  engine_table_cleanup(&dh_table);
73  }
74 
76  {
77  if(e->dh_meth)
78  return engine_table_register(&dh_table,
79  engine_unregister_all_DH, e, &dummy_nid, 1, 0);
80  return 1;
81  }
82 
84  {
85  ENGINE *e;
86 
87  for(e=ENGINE_get_first() ; e ; e=ENGINE_get_next(e))
89  }
90 
92  {
93  if(e->dh_meth)
94  return engine_table_register(&dh_table,
95  engine_unregister_all_DH, e, &dummy_nid, 1, 1);
96  return 1;
97  }
98 
99 /* Exposed API function to get a functional reference from the implementation
100  * table (ie. try to get a functional reference from the tabled structural
101  * references). */
103  {
104  return engine_table_select(&dh_table, dummy_nid);
105  }
106 
107 /* Obtains an DH implementation from an ENGINE functional reference */
109  {
110  return e->dh_meth;
111  }
112 
113 /* Sets an DH implementation in an ENGINE structure */
114 int ENGINE_set_DH(ENGINE *e, const DH_METHOD *dh_meth)
115  {
116  e->dh_meth = dh_meth;
117  return 1;
118  }