*/
    @JvmStatic
    @Synchronized fun forJavaName(javaName: String): CipherSuite {
      var result: CipherSuite? = INSTANCES[javaName]
      if (result == null) {
        result = INSTANCES[secondaryName(javaName)]

        if (result == null) {
          result = CipherSuite(javaName)
        }

        // Add the new cipher suite, or a confirmed alias.

import okhttp3.internal.platform.Platform
import org.conscrypt.Conscrypt

// TLS 1.3
private val TLS13_CIPHER_SUITES =
  listOf(
    CipherSuite.TLS_AES_128_GCM_SHA256,
    CipherSuite.TLS_AES_256_GCM_SHA384,
    CipherSuite.TLS_CHACHA20_POLY1305_SHA256,
    CipherSuite.TLS_AES_128_CCM_SHA256,
    CipherSuite.TLS_AES_128_CCM_8_SHA256,
  )

/**
 * A TLS 1.3 only Connection Spec. This will be eventually be exposed

        tlsVersion = TlsVersion.TLS_1_3,
        cipherSuite = CipherSuite.TLS_AES_128_GCM_SHA256,
        peerCertificates = listOf(serverCertificate.certificate, serverIntermediate.certificate),
        localCertificates = listOf(),
      )

    assertThat(handshake.tlsVersion).isEqualTo(TlsVersion.TLS_1_3)
    assertThat(handshake.cipherSuite).isEqualTo(CipherSuite.TLS_AES_128_GCM_SHA256)

        assertThat(sslSocket.enabledCipherSuites)
          .containsExactly(
            CipherSuite.TLS_AES_128_GCM_SHA256.javaName,
            CipherSuite.TLS_AES_256_GCM_SHA384.javaName,
            CipherSuite.TLS_CHACHA20_POLY1305_SHA256.javaName,
            CipherSuite.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256.javaName,
            CipherSuite.TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA.javaName,
          )
      } else {

import mockwebserver3.MockWebServer
import okhttp3.CipherSuite.Companion.TLS_AES_128_GCM_SHA256
import okhttp3.CipherSuite.Companion.TLS_AES_256_GCM_SHA384
import okhttp3.CipherSuite.Companion.TLS_CHACHA20_POLY1305_SHA256
import okhttp3.CipherSuite.Companion.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
import okhttp3.CipherSuite.Companion.TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384
import okhttp3.CipherSuite.Companion.TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384

    // not customize the cipher suites list.
    List<CipherSuite> customCipherSuites = asList(
        CipherSuite.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
        CipherSuite.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
        CipherSuite.TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,
        CipherSuite.TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384);

@file:JvmName("Internal")
@file:Suppress("ktlint:standard:filename")

package okhttp3.internal

import java.nio.charset.Charset
import javax.net.ssl.SSLSocket
import okhttp3.Cache
import okhttp3.CipherSuite
import okhttp3.ConnectionListener
import okhttp3.ConnectionPool
import okhttp3.ConnectionSpec
import okhttp3.Cookie
import okhttp3.Headers
import okhttp3.HttpUrl
import okhttp3.MediaType

    @JvmName("get")
    fun SSLSession.handshake(): Handshake {
      val cipherSuite =
        when (val cipherSuiteString = checkNotNull(cipherSuite) { "cipherSuite == null" }) {
          "TLS_NULL_WITH_NULL_NULL", "SSL_NULL_WITH_NULL_NULL" -> {
            throw IOException("cipherSuite == $cipherSuiteString")
          }
          else -> CipherSuite.forJavaName(cipherSuiteString)
        }

        CipherSuite.TLS_CHACHA20_POLY1305_SHA256,
        // TLSv1.0, TLSv1.1, TLSv1.2.
        CipherSuite.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
        CipherSuite.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
        CipherSuite.TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,
        CipherSuite.TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
        CipherSuite.TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256,

    assertThat(CipherSuite.TLS_RSA_EXPORT_WITH_RC4_40_MD5)
      .isEqualTo(forJavaName("SSL_RSA_EXPORT_WITH_RC4_40_MD5"))
    assertThat(CipherSuite.TLS_RSA_WITH_AES_128_CBC_SHA256)
      .isNotEqualTo(CipherSuite.TLS_RSA_EXPORT_WITH_RC4_40_MD5)
  }

  @Test
  fun forJavaName_acceptsArbitraryStrings() {
    // Shouldn't throw.
    forJavaName("example CipherSuite name that is not in the whitelist")
  }