DSA_dup_DH(3)

DSA_dup_DH(3) | OpenSSL | DSA_dup_DH(3)

# NAME

DSA_dup_DH - create a DH structure out of DSA structure

# LIBRARY

libcrypto, -lcrypto

# 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

openssl_dh(3), openssl_dsa(3), ERR_get_error(3)

# HISTORY

DSA_dup_DH() was added in OpenSSL 0.9.4.

2009-07-20 | 1.0.1-dev