1e71b7053SJung-uk Kim=pod 2e71b7053SJung-uk Kim 3e71b7053SJung-uk Kim=head1 NAME 4e71b7053SJung-uk Kim 5e71b7053SJung-uk KimDSA_dup_DH - create a DH structure out of DSA structure 6e71b7053SJung-uk Kim 7e71b7053SJung-uk Kim=head1 SYNOPSIS 8e71b7053SJung-uk Kim 9e71b7053SJung-uk Kim #include <openssl/dsa.h> 10e71b7053SJung-uk Kim 11*b077aed3SPierre ProncheryThe following functions have been deprecated since OpenSSL 3.0, and can be 12*b077aed3SPierre Proncheryhidden entirely by defining B<OPENSSL_API_COMPAT> with a suitable version value, 13*b077aed3SPierre Proncherysee L<openssl_user_macros(7)>: 14*b077aed3SPierre Pronchery 15e71b7053SJung-uk Kim DH *DSA_dup_DH(const DSA *r); 16e71b7053SJung-uk Kim 17e71b7053SJung-uk Kim=head1 DESCRIPTION 18e71b7053SJung-uk Kim 19*b077aed3SPierre ProncheryThe function described on this page is deprecated. There is no direct 20*b077aed3SPierre Proncheryreplacement, applications should use the EVP_PKEY APIs for Diffie-Hellman 21*b077aed3SPierre Proncheryoperations. 22*b077aed3SPierre Pronchery 23e71b7053SJung-uk KimDSA_dup_DH() duplicates DSA parameters/keys as DH parameters/keys. q 24e71b7053SJung-uk Kimis lost during that conversion, but the resulting DH parameters 25e71b7053SJung-uk Kimcontain its length. 26e71b7053SJung-uk Kim 27e71b7053SJung-uk Kim=head1 RETURN VALUES 28e71b7053SJung-uk Kim 29e71b7053SJung-uk KimDSA_dup_DH() returns the new B<DH> structure, and NULL on error. The 30e71b7053SJung-uk Kimerror codes can be obtained by L<ERR_get_error(3)>. 31e71b7053SJung-uk Kim 32e71b7053SJung-uk Kim=head1 NOTE 33e71b7053SJung-uk Kim 34e71b7053SJung-uk KimBe careful to avoid small subgroup attacks when using this. 35e71b7053SJung-uk Kim 36e71b7053SJung-uk Kim=head1 SEE ALSO 37e71b7053SJung-uk Kim 38e71b7053SJung-uk KimL<DH_new(3)>, L<DSA_new(3)>, L<ERR_get_error(3)> 39e71b7053SJung-uk Kim 40*b077aed3SPierre Pronchery=head1 HISTORY 41*b077aed3SPierre Pronchery 42*b077aed3SPierre ProncheryThis function was deprecated in OpenSSL 3.0. 43*b077aed3SPierre Pronchery 44e71b7053SJung-uk Kim=head1 COPYRIGHT 45e71b7053SJung-uk Kim 46*b077aed3SPierre ProncheryCopyright 2000-2021 The OpenSSL Project Authors. All Rights Reserved. 47e71b7053SJung-uk Kim 48*b077aed3SPierre ProncheryLicensed under the Apache License 2.0 (the "License"). You may not use 49e71b7053SJung-uk Kimthis file except in compliance with the License. You can obtain a copy 50e71b7053SJung-uk Kimin the file LICENSE in the source distribution or at 51e71b7053SJung-uk KimL<https://www.openssl.org/source/license.html>. 52e71b7053SJung-uk Kim 53e71b7053SJung-uk Kim=cut 54