NAME
DH_size, DH_bits
— get Diffie-Hellman prime
size
SYNOPSIS
#include
<openssl/dh.h>
int
DH_size(const DH *dh);
int
DH_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 in the key.
dh and dh->p must
not be NULL.
SEE ALSO
BN_num_bytes(3), DH_generate_key(3), DH_get0_key(3), DH_new(3), DH_security_bits(3)
HISTORY
DH_size() first appeared in SSLeay 0.5.1
and has been available since OpenBSD 2.4.
DH_bits() first appeared in OpenSSL 1.1.0
and has been available since OpenBSD 6.3.