1e1051a39Sopenharmony_ci=pod 2e1051a39Sopenharmony_ci 3e1051a39Sopenharmony_ci=head1 NAME 4e1051a39Sopenharmony_ci 5e1051a39Sopenharmony_ciDSA_dup_DH - create a DH structure out of DSA structure 6e1051a39Sopenharmony_ci 7e1051a39Sopenharmony_ci=head1 SYNOPSIS 8e1051a39Sopenharmony_ci 9e1051a39Sopenharmony_ci #include <openssl/dsa.h> 10e1051a39Sopenharmony_ci 11e1051a39Sopenharmony_ciThe following functions have been deprecated since OpenSSL 3.0, and can be 12e1051a39Sopenharmony_cihidden entirely by defining B<OPENSSL_API_COMPAT> with a suitable version value, 13e1051a39Sopenharmony_cisee L<openssl_user_macros(7)>: 14e1051a39Sopenharmony_ci 15e1051a39Sopenharmony_ci DH *DSA_dup_DH(const DSA *r); 16e1051a39Sopenharmony_ci 17e1051a39Sopenharmony_ci=head1 DESCRIPTION 18e1051a39Sopenharmony_ci 19e1051a39Sopenharmony_ciThe function described on this page is deprecated. There is no direct 20e1051a39Sopenharmony_cireplacement, applications should use the EVP_PKEY APIs for Diffie-Hellman 21e1051a39Sopenharmony_cioperations. 22e1051a39Sopenharmony_ci 23e1051a39Sopenharmony_ciDSA_dup_DH() duplicates DSA parameters/keys as DH parameters/keys. q 24e1051a39Sopenharmony_ciis lost during that conversion, but the resulting DH parameters 25e1051a39Sopenharmony_cicontain its length. 26e1051a39Sopenharmony_ci 27e1051a39Sopenharmony_ci=head1 RETURN VALUES 28e1051a39Sopenharmony_ci 29e1051a39Sopenharmony_ciDSA_dup_DH() returns the new B<DH> structure, and NULL on error. The 30e1051a39Sopenharmony_cierror codes can be obtained by L<ERR_get_error(3)>. 31e1051a39Sopenharmony_ci 32e1051a39Sopenharmony_ci=head1 NOTE 33e1051a39Sopenharmony_ci 34e1051a39Sopenharmony_ciBe careful to avoid small subgroup attacks when using this. 35e1051a39Sopenharmony_ci 36e1051a39Sopenharmony_ci=head1 SEE ALSO 37e1051a39Sopenharmony_ci 38e1051a39Sopenharmony_ciL<DH_new(3)>, L<DSA_new(3)>, L<ERR_get_error(3)> 39e1051a39Sopenharmony_ci 40e1051a39Sopenharmony_ci=head1 HISTORY 41e1051a39Sopenharmony_ci 42e1051a39Sopenharmony_ciThis function was deprecated in OpenSSL 3.0. 43e1051a39Sopenharmony_ci 44e1051a39Sopenharmony_ci=head1 COPYRIGHT 45e1051a39Sopenharmony_ci 46e1051a39Sopenharmony_ciCopyright 2000-2021 The OpenSSL Project Authors. All Rights Reserved. 47e1051a39Sopenharmony_ci 48e1051a39Sopenharmony_ciLicensed under the Apache License 2.0 (the "License"). You may not use 49e1051a39Sopenharmony_cithis file except in compliance with the License. You can obtain a copy 50e1051a39Sopenharmony_ciin the file LICENSE in the source distribution or at 51e1051a39Sopenharmony_ciL<https://www.openssl.org/source/license.html>. 52e1051a39Sopenharmony_ci 53e1051a39Sopenharmony_ci=cut 54