DSA_DUP_DH(3ssl) OpenSSL DSA_DUP_DH(3ssl)

DSA_dup_DH - create a DH structure out of DSA structure

#include <openssl/dsa.h>

The following functions have been deprecated since OpenSSL 3.0, and can be hidden entirely by defining OPENSSL_API_COMPAT with a suitable version value, see openssl_user_macros(7):

DH *DSA_dup_DH(const DSA *r);

The function described on this page is deprecated. There is no direct replacement, applications should use the EVP_PKEY APIs for Diffie-Hellman operations.

DSA_dup_DH() duplicates DSA parameters/keys as DH parameters/keys. q is lost during that conversion, but the resulting DH parameters contain its length.

DSA_dup_DH() returns the new DH structure, and NULL on error. The error codes can be obtained by ERR_get_error(3).

Be careful to avoid small subgroup attacks when using this.

DH_new(3), DSA_new(3), ERR_get_error(3)

This function was deprecated in OpenSSL 3.0.

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Licensed under the Apache License 2.0 (the "License"). You may not use this file except in compliance with the License. You can obtain a copy in the file LICENSE in the source distribution or at https://www.openssl.org/source/license.html.

2024-04-28 3.3.0