import okhttp3.RequestBody.Companion.toRequestBody
import okhttp3.ResponseBody.Companion.toResponseBody
import okhttp3.internal.closeQuietly
import okhttp3.testing.PlatformRule
import okhttp3.tls.HandshakeCertificates
import org.bouncycastle.tls.TlsFatalAlert
import org.junit.jupiter.api.Tag
import org.junit.jupiter.api.Test
import org.junit.jupiter.api.Timeout
import org.junit.jupiter.api.extension.RegisterExtension

@Timeout(30)

```
.
├── app
│   ├── __init__.py
│   └── main.py
├── Dockerfile
└── requirements.txt
```

#### Hinter einem TLS-Terminierungsproxy { #behind-a-tls-termination-proxy }

pkg bufio, method (ReadWriter) AvailableBuffer() []uint8
pkg bytes, func Cut([]uint8, []uint8) ([]uint8, []uint8, bool)
pkg bytes, func Title //deprecated
pkg crypto/tls, method (*Conn) NetConn() net.Conn
pkg crypto/tls, type Config struct, PreferServerCipherSuites //deprecated
pkg crypto/x509, method (*CertPool) Subjects //deprecated
pkg debug/buildinfo, func Read(io.ReaderAt) (*debug.BuildInfo, error)

			Optional:    true,
			Type:        "list",
		},
		config.HelpKV{
			Key:         TLSSkipVerify,
			Description: `trust server TLS without verification` + defaultHelpPostfix(TLSSkipVerify),
			Optional:    true,
			Type:        "on|off",
		},
		config.HelpKV{
			Key:         ServerInsecure,

 * server.
 *
 * ## Preemptive Authentication
 *
 * To make HTTPS calls using an HTTP proxy server OkHttp must first negotiate a connection with
 * the proxy. This proxy connection is called a "TLS Tunnel" and is specified by
 * [RFC 2817][1]. The HTTP CONNECT request that creates this tunnel connection is special: it
 * does not participate in any [interceptors][Interceptor] or [event listeners][EventListener]. It

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package okhttp3.tls.internal.der

import java.math.BigInteger
import java.security.GeneralSecurityException
import java.security.PublicKey
import java.security.Signature
import java.security.SignatureException

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package okhttp3.tls.internal.der

import java.math.BigInteger
import okio.Buffer
import okio.BufferedSink
import okio.ByteString

internal class DerWriter(
  sink: BufferedSink,
) {

import okhttp3.internal.connection.asBufferedSocket
import okhttp3.internal.http2.Header
import okhttp3.internal.http2.Http2Connection
import okhttp3.internal.http2.Http2Stream
import okhttp3.internal.platform.Platform
import okhttp3.tls.internal.TlsUtil.localhost
import okio.buffer
import okio.source

/** A basic HTTP/2 server that serves the contents of a local directory.  */
class Http2Server(
  private val baseDirectory: File,

import assertk.assertions.isEqualTo
import assertk.assertions.isNull
import java.io.IOException
import java.security.cert.Certificate
import kotlin.test.assertFailsWith
import okhttp3.Handshake.Companion.handshake
import okhttp3.tls.HeldCertificate
import org.junit.jupiter.api.Test

class HandshakeTest {
  val serverRoot =
    HeldCertificate
      .Builder()
      .certificateAuthority(1)
      .build()
  val serverIntermediate =

	// Fetch TLS key and pem files from test-data/ directory.
	//	dir, _ := os.Getwd()
	//	testDataDir := filepath.Join(filepath.Dir(dir), "test-data")
	//
	//	pemFile := filepath.Join(testDataDir, "server.pem")
	//	keyFile := filepath.Join(testDataDir, "server.key")
	cer, err := tls.X509KeyPair(cert, key)
	if err != nil {
		t.Fatalf("Failed to load certificate: %v", err)
	}
	config := &tls.Config{Certificates: []tls.Certificate{cer}}