OpenSSL

Cryptography and SSL/TLS Toolkit

DSA_dup_DH

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.

NOTE

Be careful to avoid small subgroup attacks when using this.

SEE ALSO

dh, dsa, ERR_get_error

HISTORY

DSA_dup_DH() was added in OpenSSL 0.9.4.