_Java_sun_security_ec_ECDHKeyAgreement_deriveKey@20 _Java_sun_security_ec_ECDSASignature_signDigest@24 _Java_sun_security_ec_ECDSASignature_verifySignedDigest@24 _Java_sun_security_ec_ECKeyPairGenerator_generateECKeyPair@20 _Java_sun_security_ec_ECKeyPairGenerator_getEncodedBytes@16