DH_size, DH_bits, DH_security_bits - get Diffie-Hellman prime size and security bits
SYNOPSIS
#include <openssl/dh.h>
int DH_size(const DH *dh);
int DH_bits(const DH *dh);
int DH_security_bits(const DH *dh);
DESCRIPTION
DH_size() returns the Diffie-Hellman prime size in bytes. It can be used to determine how much memory must be allocated for the shared secret computed by DH_compute_key(3).
DH_bits() returns the number of significant bits.
dh and dh->p must not be NULL.
DH_security_bits() returns the number of security bits of the given dh key. See BN_security_bits(3).
RETURN VALUES
DH_size() returns the prime size of Diffie-Hellman in bytes.
DH_bits() returns the number of bits in the key.
DH_security_bits() returns the number of security bits.
The DH_bits() function was added in OpenSSL 1.1.0.
COPYRIGHT
Copyright 2000-2018 The OpenSSL Project Authors. All Rights Reserved.
Licensed under the OpenSSL license (the "License"). You may not use this file except in compliance with the License. You can obtain a copy in the file LICENSE in the source distribution or at https://www.openssl.org/source/license.html.