final byte[] original = "Hello World".getBytes();
        final byte[] encrypted = cipher.encrypto(original);
        final byte[] decrypted = cipher.decrypto(encrypted);

        assertThat(encrypted, is(not(original)));
        assertArrayEquals(original, decrypted);
    }

    @Test
    @SuppressWarnings("deprecation")
    public void testDeprecatedEncryptoDecryptoText() {

        byte[] decrypted = KerberosEncData.decrypt(data, key, KerberosConstants.DES_ENC_TYPE);
        assertNotNull(decrypted);
        // With dummy data, we can't verify the content, just that it decrypts without error
        // and returns a result of the expected size.
        assertEquals(data.length - 24, decrypted.length);
    }

    /**
     * Test decrypt with an unsupported encryption type.
     */

import java.security.Provider;

import javax.crypto.Cipher;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.spec.SecretKeySpec;

import org.bouncycastle.jce.provider.BouncyCastleProvider;

import jcifs.CIFSUnsupportedCryptoException;

/**
 * Cryptographic utility class providing encryption and decryption functionality for jCIFS.

                }

                try {
                    byte[] decrypted = KerberosEncData.decrypt(crypt, serverKey, serverKey.getKeyType());
                    this.encData = new KerberosEncData(decrypted, keysByAlgo);
                } catch (GeneralSecurityException e) {
                    throw new PACDecodingException("Decryption failed " + serverKey.getKeyType(), e);
                }
                break;

import java.security.SecureRandom;

import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;

import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;

import jcifs.BaseTest;

/**
 * Test class for Crypto utility functionality
 */

            s[i] = s[j];
            s[j] = t;
        }

        i = j = 0;
    }

    /**
     * Encrypts or decrypts data using the RC4 stream cipher.
     * Since RC4 is a stream cipher, the same operation is used for both encryption and decryption.
     *
     * @param src the source data array
     * @param soff the offset in the source array
     * @param slen the length of data to process

 */
package jcifs.internal.smb2;

import java.nio.charset.StandardCharsets;

import org.bouncycastle.crypto.DerivationParameters;
import org.bouncycastle.crypto.digests.SHA256Digest;
import org.bouncycastle.crypto.generators.KDFCounterBytesGenerator;
import org.bouncycastle.crypto.macs.HMac;
import org.bouncycastle.crypto.params.KDFCounterParameters;

/**
 * SMB3 SP800-108 Counter Mode Key Derivation
 *
 * @author mbechler
 *

    private byte apOptions;
    private KerberosTicket ticket;

    /**
     * Creates a Kerberos AP request from a token.
     *
     * @param token the Kerberos AP-REQ token
     * @param keys the Kerberos keys for decryption
     * @throws PACDecodingException if the token cannot be decoded
     */
    public KerberosApRequest(byte[] token, KerberosKey[] keys) throws PACDecodingException {
        this(parseSequence(token), keys);
    }

import java.security.GeneralSecurityException;
import java.security.Key;
import java.security.MessageDigest;
import java.util.Arrays;
import java.util.Map;

import javax.crypto.Cipher;
import javax.crypto.Mac;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import javax.security.auth.kerberos.KerberosKey;

/**

        this(token, null);
    }

    /**
     * Constructs a KerberosToken from token bytes with decryption keys.
     *
     * @param token the token bytes
     * @param keys array of Kerberos keys for decryption
     * @throws PACDecodingException if token decoding fails
     */
    public KerberosToken(byte[] token, KerberosKey[] keys) throws PACDecodingException {