113d40330Schristos=pod 213d40330Schristos 313d40330Schristos=head1 NAME 413d40330Schristos 513d40330SchristosDSA_dup_DH - create a DH structure out of DSA structure 613d40330Schristos 713d40330Schristos=head1 SYNOPSIS 813d40330Schristos 913d40330Schristos #include <openssl/dsa.h> 1013d40330Schristos 11*b0d17251SchristosThe following functions have been deprecated since OpenSSL 3.0, and can be 12*b0d17251Schristoshidden entirely by defining B<OPENSSL_API_COMPAT> with a suitable version value, 13*b0d17251Schristossee L<openssl_user_macros(7)>: 14*b0d17251Schristos 1513d40330Schristos DH *DSA_dup_DH(const DSA *r); 1613d40330Schristos 1713d40330Schristos=head1 DESCRIPTION 1813d40330Schristos 19*b0d17251SchristosThe function described on this page is deprecated. There is no direct 20*b0d17251Schristosreplacement, applications should use the EVP_PKEY APIs for Diffie-Hellman 21*b0d17251Schristosoperations. 22*b0d17251Schristos 2313d40330SchristosDSA_dup_DH() duplicates DSA parameters/keys as DH parameters/keys. q 2413d40330Schristosis lost during that conversion, but the resulting DH parameters 2513d40330Schristoscontain its length. 2613d40330Schristos 2713d40330Schristos=head1 RETURN VALUES 2813d40330Schristos 2913d40330SchristosDSA_dup_DH() returns the new B<DH> structure, and NULL on error. The 3013d40330Schristoserror codes can be obtained by L<ERR_get_error(3)>. 3113d40330Schristos 3213d40330Schristos=head1 NOTE 3313d40330Schristos 3413d40330SchristosBe careful to avoid small subgroup attacks when using this. 3513d40330Schristos 3613d40330Schristos=head1 SEE ALSO 3713d40330Schristos 3813d40330SchristosL<DH_new(3)>, L<DSA_new(3)>, L<ERR_get_error(3)> 3913d40330Schristos 40*b0d17251Schristos=head1 HISTORY 41*b0d17251Schristos 42*b0d17251SchristosThis function was deprecated in OpenSSL 3.0. 43*b0d17251Schristos 4413d40330Schristos=head1 COPYRIGHT 4513d40330Schristos 46*b0d17251SchristosCopyright 2000-2021 The OpenSSL Project Authors. All Rights Reserved. 4713d40330Schristos 48*b0d17251SchristosLicensed under the Apache License 2.0 (the "License"). You may not use 4913d40330Schristosthis file except in compliance with the License. You can obtain a copy 5013d40330Schristosin the file LICENSE in the source distribution or at 5113d40330SchristosL<https://www.openssl.org/source/license.html>. 5213d40330Schristos 5313d40330Schristos=cut 54