* Certificates have a **lifetime**.
    * They **expire**.
    * And then they need to be **renewed**, **acquired again** from the third party.
* The encryption of the connection happens at the **TCP level**.
    * That's one layer **below HTTP**.
    * So, the **certificate and encryption** handling is done **before HTTP**.
* **TCP doesn't know about "domains"**. Only about IP addresses.

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package jcifs.smb1.util;

/**
 * Implementation of the RC4 (ARCFOUR) stream cipher algorithm.
 * This class provides RC4 encryption/decryption functionality used in SMB1 protocol operations.
 */
public class RC4 {

    byte[] s;
    int i, j;

    /**
     * Default constructor for RC4 cipher.

    }

    @Test
    @DisplayName("Should handle AES encryption operations")
    void testAESOperations() throws Exception {
        // Given
        byte[] key = new byte[16]; // 128-bit key
        byte[] iv = new byte[16]; // 128-bit IV
        byte[] plaintext = "This is test data for AES encryption test".getBytes();

        new SecureRandom().nextBytes(key);

    /** Authorization data type: Relevant */
    int AUTH_DATA_RELEVANT = 1;
    /** Authorization data type: PAC */
    int AUTH_DATA_PAC = 128;

    /** DES encryption type identifier */
    int DES_ENC_TYPE = 3;
    /** RC4 encryption type identifier */
    int RC4_ENC_TYPE = 23;
    /** RC4 algorithm name */
    String RC4_ALGORITHM = "ARCFOUR";
    /** HMAC algorithm name */
    String HMAC_ALGORITHM = "HmacMD5";

    private List<KerberosAuthData> userAuthorizations;

    /**
     * Constructs KerberosEncData from encrypted token bytes.
     *
     * @param token the encrypted Kerberos token
     * @param keys map of encryption keys indexed by key type
     * @throws PACDecodingException if decoding fails
     */
    public KerberosEncData(byte[] token, Map<Integer, KerberosKey> keys) throws PACDecodingException {

        assertFalse(session.isConnected());
        assertTrue(session.isFailed());
    }

    @Test
    @DisplayName("encryption: flags, encryption, and decryption delegation")
    void testEncryptionDelegation() throws Exception {
        SmbSessionImpl session = newSession();

        // No encryption context -> throws
        CIFSException notEnabled = assertThrows(CIFSException.class, () -> session.encryptMessage(new byte[] { 1 }));

    int NTLMSSP_NEGOTIATE_VERSION = 0x2000000;

    /**
     * Indicates that 128-bit encryption is supported.
     */
    int NTLMSSP_NEGOTIATE_128 = 0x20000000;

    /**
     * Request explicit key exchange
     */
    int NTLMSSP_NEGOTIATE_KEY_EXCH = 0x40000000;

    /**
     * Indicates that 56-bit encryption is supported.
     */
    int NTLMSSP_NEGOTIATE_56 = 0x80000000;

    }

    /**
     * Test encryption context performance without synchronization bottlenecks
     */
    @Test
    public void testEncryptionContextPerformance() throws Exception {
        // Create mock encryption context for testing (simplified)
        // Note: This tests the atomic operations without actual encryption

        int threadCount = 8;
        int operationsPerThread = 500;

    /**
     * @return the selectedDialect
     */
    @Override
    public DialectVersion getSelectedDialect() {
        return this.selectedDialect;
    }

    /**
     * Gets the encryption cipher selected for SMB3 encryption.
     *
     * @return the selectedCipher
     */
    public int getSelectedCipher() {
        return this.selectedCipher;
    }

    /**

     * @throws SmbException if an error occurs checking signing status
     */
    boolean isSigningEnforced() throws SmbException;

    /**
     * Gets the server's encryption key for authentication.
     *
     * @return the encryption key used by the server
     */
    byte[] getServerEncryptionKey();

    /**
     * Gets or creates an SMB session for the given context.
     *