gnutls_dh_get_prime_bits − API function
#include <gnutls/gnutls.h>
int gnutls_dh_get_prime_bits(gnutls_session_t session);
gnutls_session_t session
is a gnutls session
This function will return the bits of the prime used in the last Diffie−Hellman key exchange with the peer. Should be used for both anonymous and ephemeral Diffie−Hellman. Note that some ciphers, like RSA and DSA without DHE, do not use a Diffie−Hellman key exchange, and then this function will return 0.
The Diffie−Hellman bit strength is returned, or 0 if no Diffie−Hellman key exchange was done, or a negative error code on failure.
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