dh_size(3) - Linux man page
Name
DH_size - get Diffie-Hellman prime size
Synopsis
#include <openssl/dh.h> int DH_size(DH *dh);
Description
This function returns the Diffie-Hellman size in bytes. It can be used to determine how much memory must be allocated for the shared secret computed by DH_compute_key().
dh->p must not be NULL .
Return Value
The size in bytes.
See Also
dh(3), dh_generate_key(3)
History
DH_size() is available in all versions of SSLeay and OpenSSL.