with certificates and the privacy of data exchanged with strong ciphers.

When negotiating a connection to an HTTPS server, OkHttp needs to know which [TLS versions](https://square.github.io/okhttp/4.x/okhttp/okhttp3/-tls-version/) and [cipher suites](https://square.github.io/okhttp/4.x/okhttp/okhttp3/-cipher-suite/) to offer. A client that wants to maximize connectivity would include obsolete TLS versions and weak-by-design cipher suites. A strict client that wants to maximize security would...

    @Test
    @DisplayName("Should return selected cipher")
    void testGetSelectedCipher() throws Exception {
        // Given
        setPrivateField(response, "selectedCipher", EncryptionNegotiateContext.CIPHER_AES128_GCM);

        // When
        int cipher = response.getSelectedCipher();

        // Then
        assertEquals(EncryptionNegotiateContext.CIPHER_AES128_GCM, cipher);
    }

    @Test

     *
     * @return preferred encryption cipher list in order of preference for SMB3 encryption
     * @since 2.2
     */
    String getPreferredCiphers();

    /**
     * Property {@code jcifs.smb.client.aes256Enabled} (boolean, default true)
     *
     * @return whether AES-256 encryption ciphers are enabled for SMB3.x
     * @since 2.2
     */
    boolean isAES256Enabled();

    /** Whether SMB3 encryption is enabled */
    protected boolean encryptionEnabled = false;
    /** Whether SMB3 compression is enabled */
    protected boolean compressionEnabled = false;
    /** Preferred encryption ciphers in order of preference */
    protected String preferredCiphers = "AES_128_GCM,AES_128_CCM,AES_256_GCM,AES_256_CCM";
    /** Whether AES-256 encryption is enabled */
    protected boolean aes256Enabled = true;

    assertThat(forJavaName(java.lang.String(cs.javaName) as String))
      .isSameAs(cs)
  }

  @Test
  fun equals() {
    assertThat(forJavaName("cipher")).isEqualTo(forJavaName("cipher"))
    assertThat(forJavaName("cipherB")).isNotEqualTo(forJavaName("cipherA"))
    assertThat(CipherSuite.TLS_RSA_EXPORT_WITH_RC4_40_MD5)
      .isEqualTo(forJavaName("SSL_RSA_EXPORT_WITH_RC4_40_MD5"))

 */
package org.codelibs.core.exception;

import javax.crypto.IllegalBlockSizeException;

/**
 * Signals that this exception has been thrown when a block cipher is supplied with input data whose length is not a multiple of the cipher's block size, or that has been padded to the wrong length.
 * @author shinsuke
 */
public class IllegalBlockSizeRuntimeException extends ClRuntimeException {

    }

    @Test
    @DisplayName("Should handle different cipher IDs")
    void testDifferentCipherIds() {
        // Test cipher ID 1 (AES-CCM)
        Smb2EncryptionContext context1 = new Smb2EncryptionContext(1, DialectVersion.SMB311, testEncryptionKey, testDecryptionKey);
        assertEquals(1, context1.getCipherId(), "Should handle cipher ID 1");

        // Test cipher ID 2 (AES-GCM)

        };
        roleQueryHelperImpl.cipher = cipher;

        Set<String> roleSet;
        boolean encrypted;
        String value;

        encrypted = true;
        value = cipher.encryptoText("");
        roleSet = decodedRoleList(roleQueryHelperImpl, value, encrypted);
        assertEquals(0, roleSet.size());

        encrypted = true;
        value = cipher.encryptoText("role1");

---

<a name="tlsv13_only"></a>
#### ¹ TLSv1.3 Only

Cipher suites that are only available with TLSv1.3.

<a name="http2_naughty"></a>
#### ² HTTP/2 Cipher Suite Denylist

Cipher suites that are [discouraged for use][http2_denylist] with HTTP/2. OkHttp includes them because better suites are not commonly available. For example, none of the better cipher suites listed above shipped with Android 4.4 or Java 7.

        return new HMACT64(key);
    }

    /**
     * Get an RC4 cipher instance initialized with the specified key.
     * @param key the encryption key
     * @return RC4 cipher in encryption mode
     */
    public static Cipher getArcfour(final byte[] key) {
        try {
            final Cipher c = Cipher.getInstance("RC4");
            c.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(key, "RC4"));
            return c;