*/
    protected String transformation = RSA;

    /**
     * The key to use for encryption/decryption.
     */
    protected String key;

    /**
     * The character set name to use for encoding/decoding strings.
     */
    protected String charsetName = CoreLibConstants.UTF_8;

    /**
     * The queue of ciphers for encryption.
     */
    protected Queue<Cipher> encryptoQueue = new ConcurrentLinkedQueue<>();

 * under the License.
 */

/**
 * Provides the API for the Maven Password Encryption tool ({@code mvnenc}).
 *
 * <p>This package contains interfaces and classes for the password encryption tool,
 * which helps secure sensitive information in Maven settings and configuration files.</p>
 *
 * <p>Key features include:</p>
 * <ul>
 *   <li>Password encryption and decryption</li>
 *   <li>Master password management</li>

        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");

    /**
     * Test decrypt with an unsupported encryption type.
     */
    @Test
    void testDecryptUnsupportedType() {
        Key key = new KerberosKey(null, new byte[16], 99, 0);
        byte[] data = new byte[16];
        Exception exception = assertThrows(GeneralSecurityException.class, () -> KerberosEncData.decrypt(data, key, 99));
        assertEquals("Unsupported encryption type 99", exception.getMessage());
    }

import org.apache.maven.api.annotations.Nonnull;
import org.apache.maven.api.cli.Options;

/**
 * Defines the options specific to the Maven encryption tool.
 * This interface extends the general {@link Options} interface, adding encryption-specific configuration options.
 *
 * @since 4.0.0
 */
@Experimental
public interface EncryptOptions extends Options {
    /**

            EncryptionNegotiateContext encryption = new EncryptionNegotiateContext();

            assertNotEquals(preauth.getContextType(), encryption.getContextType());
            assertEquals(0x1, preauth.getContextType());
            assertEquals(0x2, encryption.getContextType());
        }

        @Test

    /**
     * Server's time zone offset in minutes from UTC.
     */
    public int serverTimeZone;
    /**
     * Length of the encryption key.
     */
    public int encryptionKeyLength;
    /**
     * Encryption key for password encryption.
     */
    public byte[] encryptionKey;
    /**
     * Server's globally unique identifier.
     */
    public byte[] guid;

/**
 * Utility class for calculating and verifying PAC (Privilege Attribute Certificate) message authentication codes.
 * This class provides methods for computing MACs using various Kerberos encryption types including
 * ARCFOUR-HMAC-MD5 and AES-based HMAC algorithms.
 */
public class PacMac {

    /**
     * Private constructor to prevent instantiation of utility class.
     */
    private PacMac() {

import javax.security.auth.Destroyable;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Secure credential storage with encryption at rest.
 *
 * Provides secure storage of passwords and other sensitive credentials
 * using AES-GCM encryption with PBKDF2 key derivation.
 *
 * Features:
 * - Encrypts credentials at rest using AES-256-GCM
 * - Uses PBKDF2 for key derivation from master password

    @DisplayName("Message constructor should handle crypto-specific error messages")
    @NullAndEmptySource
    @ValueSource(strings = { "AES encryption not supported", "Missing Bouncy Castle provider", "Invalid key length for AES-128",
            "RC4 cipher not available in this JVM", "DES encryption is deprecated and not supported", "HMAC-SHA256 algorithm not found",
            "RSA key generation failed: key size not supported" })