/**
     * Reads a Windows FILETIME value and converts it to a Date.
     * @return the Date object, or null if the time represents infinity
     * @throws IOException if an I/O error occurs
     */
    public Date readFiletime() throws IOException {
        Date date = null;

        final long last = readUnsignedInt();
        final long first = readUnsignedInt();
        if (first != 0x7fffffffL && last != 0xffffffffL) {

            // Dates
            this.logonTime = pacStream.readFiletime();
            this.logoffTime = pacStream.readFiletime();
            this.kickOffTime = pacStream.readFiletime();
            this.pwdLastChangeTime = pacStream.readFiletime();
            this.pwdCanChangeTime = pacStream.readFiletime();
            this.pwdMustChangeTime = pacStream.readFiletime();

            // User related strings as UnicodeStrings

        data[5] = (byte) (high >> 8);
        data[6] = (byte) (high >> 16);
        data[7] = (byte) (high >> 24);

        PacDataInputStream pdis = createInputStream(data);
        Date date = pdis.readFiletime();
        assertNotNull(date);
        // Allow for a small difference due to precision loss
        assertEquals(time / 1000, date.getTime() / 1000);

        // Test with null date (0x7fffffff ffffffff)

        ByteArrayInputStream bais = new ByteArrayInputStream(baos.toByteArray());
        PacDataInputStream pacStream = new PacDataInputStream(bais);

        Date date = pacStream.readFiletime();
        assertNotNull(date);
        // The date should be around 1970 (allowing for some conversion differences)
        assertTrue(date.getYear() + 1900 >= 1969 && date.getYear() + 1900 <= 1971);
    }