NAME

       DSA_dup_DH - create a DH structure out of DSA structure

SYNOPSIS

        #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);

DESCRIPTION

       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.

RETURN VALUES

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

NOTE

       Be careful to avoid small subgroup attacks when using this.

SEE ALSO

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

HISTORY

       This function was deprecated in OpenSSL 3.0.

COPYRIGHT

       Copyright 2000-2021 The OpenSSL Project Authors. All Rights Reserved.

       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>.