HP OpenVMS Systems Documentation

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HP Open Source Security for OpenVMS Volume 2: HP SSL for OpenVMS > CRYPTO Application Programming Interface (API) Reference

DSA_dup_DH

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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.