DSA_dup_DH.pod 1.3 KB

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  1. =pod
  2. =head1 NAME
  3. DSA_dup_DH - create a DH structure out of DSA structure
  4. =head1 SYNOPSIS
  5. #include <openssl/dsa.h>
  6. Deprecated since OpenSSL 3.0, can be hidden entirely by defining
  7. B<OPENSSL_API_COMPAT> with a suitable version value, see
  8. L<openssl_user_macros(7)>:
  9. DH *DSA_dup_DH(const DSA *r);
  10. =head1 DESCRIPTION
  11. The function described on this page is deprecated. There is no direct
  12. replacement, applications should use the EVP_PKEY APIs for Diffie-Hellman
  13. operations.
  14. DSA_dup_DH() duplicates DSA parameters/keys as DH parameters/keys. q
  15. is lost during that conversion, but the resulting DH parameters
  16. contain its length.
  17. =head1 RETURN VALUES
  18. DSA_dup_DH() returns the new B<DH> structure, and NULL on error. The
  19. error codes can be obtained by L<ERR_get_error(3)>.
  20. =head1 NOTE
  21. Be careful to avoid small subgroup attacks when using this.
  22. =head1 SEE ALSO
  23. L<DH_new(3)>, L<DSA_new(3)>, L<ERR_get_error(3)>
  24. =head1 HISTORY
  25. This function was deprecated in OpenSSL 3.0.
  26. =head1 COPYRIGHT
  27. Copyright 2000-2020 The OpenSSL Project Authors. All Rights Reserved.
  28. Licensed under the Apache License 2.0 (the "License"). You may not use
  29. this file except in compliance with the License. You can obtain a copy
  30. in the file LICENSE in the source distribution or at
  31. L<https://www.openssl.org/source/license.html>.
  32. =cut