Function krb5_sys::krb5_k_encrypt

pub unsafe extern fn krb5_k_encrypt(context: krb5_context,
                                    key: krb5_key,
                                    usage: krb5_keyusage,
                                    cipher_state: *const krb5_data,
                                    input: *const krb5_data,
                                    output: *mut krb5_enc_data)
                                    -> krb5_error_code