* Returns the {@code char} value that is equal to {@code value}, if possible.
   *
   * @param value any value in the range of the {@code char} type
   * @return the {@code char} value that equals {@code value}
   * @throws IllegalArgumentException if {@code value} is greater than {@link Character#MAX_VALUE}
   *     or less than {@link Character#MIN_VALUE}
   */
  public static char checkedCast(long value) {
    char result = (char) value;

   * Returns the {@code char} value that is equal to {@code value}, if possible.
   *
   * @param value any value in the range of the {@code char} type
   * @return the {@code char} value that equals {@code value}
   * @throws IllegalArgumentException if {@code value} is greater than {@link Character#MAX_VALUE}
   *     or less than {@link Character#MIN_VALUE}
   */
  public static char checkedCast(long value) {
    char result = (char) value;

    }

    /**
     * Convert char array to byte array (UTF-8)
     */
    private byte[] charsToBytes(char[] chars) {
        if (chars == null) {
            return null;
        }

        // Use UTF-8 encoding
        byte[] bytes = new byte[chars.length * 3]; // Max 3 bytes per char in UTF-8
        int byteIndex = 0;

        for (char c : chars) {
            if (c < 0x80) {

        .isEqualTo(1);
    assertThat(
            Chars.indexOf(
                new char[] {(char) 2, (char) 3, (char) 2, (char) 3, (char) 4, (char) 2, (char) 3},
                new char[] {(char) 2, (char) 3, (char) 4}))
        .isEqualTo(2);
    assertThat(
            Chars.indexOf(
                new char[] {(char) 2, (char) 2, (char) 3, (char) 4, (char) 2, (char) 3, (char) 4},

    }

    /**
     * Test password in equals method
     */
    @Test
    public void testEqualsWithSecurePassword() {
        char[] password1 = "TestPass123!".toCharArray();
        char[] password2 = "TestPass123!".toCharArray();
        char[] password3 = "DifferentPass!".toCharArray();

        NtlmPasswordAuthenticator auth1 = new NtlmPasswordAuthenticator("DOMAIN", "user", password1);

-	  ((const char *) (src))[2], ((const char *) (src))[3],		      \
-	  ((const char *) (src))[4], ((const char *) (src))[5] } }),	      \
-     __extension__ ((__STRING2_COPY_ARR7)				      \
-      { { ((const char *) (src))[0], ((const char *) (src))[1],		      \
-	  ((const char *) (src))[2], ((const char *) (src))[3],		      \
-	  ((const char *) (src))[4], ((const char *) (src))[5],		      \

    if (chars instanceof String) {
      return toLowerCase((String) chars);
    }
    char[] newChars = new char[chars.length()];
    for (int i = 0; i < newChars.length; i++) {
      newChars[i] = toLowerCase(chars.charAt(i));
    }
    return String.valueOf(newChars);
  }

  /**
   * If the argument is an {@linkplain #isUpperCase(char) uppercase ASCII character}, returns the

    }

    @Test
    @DisplayName("Should convert hex chars correctly")
    void testToHexChars() {
        // Test integer conversion
        char[] dst1 = new char[8];
        Hexdump.toHexChars(0x1234ABCD, dst1, 0, 8);
        assertEquals("1234ABCD", new String(dst1));

        // Test with smaller size
        char[] dst2 = new char[4];
        Hexdump.toHexChars(0xABCD, dst2, 0, 4);

        Arrays.fill(decrypted, '\0');
    }

    @Test
    public void testEncryptDecryptEmpty() throws Exception {
        char[] plaintext = new char[0];

        byte[] encrypted = storage.encryptCredentials(plaintext);
        assertNotNull(encrypted, "Encrypted empty data should not be null");

        char[] decrypted = storage.decryptCredentials(encrypted);
        assertNotNull(decrypted, "Decrypted empty data should not be null");

      while (i + 4 <= utf16Length) {
        char c0 = input.charAt(i);
        char c1 = input.charAt(i + 1);
        char c2 = input.charAt(i + 2);
        char c3 = input.charAt(i + 3);
        if (c0 < 0x80 && c1 < 0x80 && c2 < 0x80 && c3 < 0x80) {
          int k1 = c0 | (c1 << 8) | (c2 << 16) | (c3 << 24);
          k1 = mixK1(k1);
          h1 = mixH1(h1, k1);
          i += 4;