tb_dh.c 4.1 KB

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  1. /* ====================================================================
  2. * Copyright (c) 2000 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. #include "eng_int.h"
  55. /* If this symbol is defined then ENGINE_get_default_DH(), the function that is
  56. * used by DH to hook in implementation code and cache defaults (etc), will
  57. * display brief debugging summaries to stderr with the 'nid'. */
  58. /* #define ENGINE_DH_DEBUG */
  59. static ENGINE_TABLE *dh_table = NULL;
  60. static const int dummy_nid = 1;
  61. void ENGINE_unregister_DH(ENGINE *e)
  62. {
  63. engine_table_unregister(&dh_table, e);
  64. }
  65. static void engine_unregister_all_DH(void)
  66. {
  67. engine_table_cleanup(&dh_table);
  68. }
  69. int ENGINE_register_DH(ENGINE *e)
  70. {
  71. if(e->dh_meth)
  72. return engine_table_register(&dh_table,
  73. engine_unregister_all_DH, e, &dummy_nid, 1, 0);
  74. return 1;
  75. }
  76. void ENGINE_register_all_DH()
  77. {
  78. ENGINE *e;
  79. for(e=ENGINE_get_first() ; e ; e=ENGINE_get_next(e))
  80. ENGINE_register_DH(e);
  81. }
  82. int ENGINE_set_default_DH(ENGINE *e)
  83. {
  84. if(e->dh_meth)
  85. return engine_table_register(&dh_table,
  86. engine_unregister_all_DH, e, &dummy_nid, 1, 1);
  87. return 1;
  88. }
  89. /* Exposed API function to get a functional reference from the implementation
  90. * table (ie. try to get a functional reference from the tabled structural
  91. * references). */
  92. ENGINE *ENGINE_get_default_DH(void)
  93. {
  94. return engine_table_select(&dh_table, dummy_nid);
  95. }
  96. /* Obtains an DH implementation from an ENGINE functional reference */
  97. const DH_METHOD *ENGINE_get_DH(const ENGINE *e)
  98. {
  99. return e->dh_meth;
  100. }
  101. /* Sets an DH implementation in an ENGINE structure */
  102. int ENGINE_set_DH(ENGINE *e, const DH_METHOD *dh_meth)
  103. {
  104. e->dh_meth = dh_meth;
  105. return 1;
  106. }