Function openssl_sys::PEM_write_bio_PrivateKey

pub unsafe extern fn PEM_write_bio_PrivateKey(bio: *mut BIO,
                                              pkey: *mut EVP_PKEY,
                                              cipher: *const EVP_CIPHER,
                                              kstr: *mut c_uchar,
                                              klen: c_int,
                                              callback: Option<PasswordCallback>,
                                              user_data: *mut c_void)
                                              -> c_int