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. r->q is lost during that conversion, but the resulting DH parameters contain its length.

RETURN VALUES

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

SEE ALSO

DH_new(3), DSA_get0_pqg(3), DSA_new(3)

HISTORY

DSA_dup_DH() first appeared in OpenSSL 0.9.4 and has been available since OpenBSD 2.6.

CAVEATS

Be careful to avoid small subgroup attacks when using this.