DH_SIZE(3ssl) OpenSSL DH_SIZE(3ssl) DH_size DH_bits DH_security_bits - Diffie-Hellman #include OpenSSL 3.0 OPENSSL_API_COMPAT openssl_user_macros(7): int DH_bits(const DH *dh); int DH_size(const DH *dh); int DH_security_bits(const DH *dh); . EVP_PKEY_get_bits(3) EVP_PKEY_get_security_bits(3) EVP_PKEY_get_size(3). DH_bits() . dh dh->p NULL. DH_size() Diffie-Hellman . DH_compute_key(3). DH_security_bits() dh . BN_security_bits(3). DH_bits() -1 dh . DH_size() Diffie-Hellman -1 dh . DH_security_bits() -1 dh . EVP_PKEY_get_bits(3) DH_new(3) DH_generate_key(3) BN_num_bits(3) OpenSSL 3.0. 2000-2021 OpenSSL. . Apache 2.0 ( ""). . LICENSE . 3 . . : . 3.6.2 7 2026 DH_SIZE(3ssl)