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CentOS 7.0 - man page for dsa_dup_dh (centos section 3)

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DSA_dup_DH(3)				     OpenSSL				    DSA_dup_DH(3)

NAME
       DSA_dup_DH - create a DH structure out of DSA structure

SYNOPSIS
	#include <openssl/dsa.h>

	DH * DSA_dup_DH(const DSA *r);

DESCRIPTION
       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 VALUE
       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(3), dsa(3), ERR_get_error(3)

HISTORY
       DSA_dup_DH() was added in OpenSSL 0.9.4.

1.0.1e					    2013-02-11				    DSA_dup_DH(3)
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