java web 项目 获取客户端 域账户和计算机名

String auth = request.getHeader("Authorization");
if (auth == null)
{
    response.setStatus(response.SC_UNAUTHORIZED);
    response.setHeader("WWW-Authenticate", "NTLM");
    response.flushBuffer();
    return;
}
if (auth.startsWith("NTLM "))
{
    byte[] msg = new sun.misc.BASE64Decoder().decodeBuffer(auth.substring(5));
    int off = 0, length, offset;
    if (msg[8] == 1)
    {
        byte z = 0;
        byte[] msg1 = {(byte)'N', (byte)'T', (byte)'L', (byte)'M', (byte)'S', (byte)'S', (byte)'P',
            z,(byte)2, z, z, z, z, z, z, z,(byte)40, z, z, z,
            (byte)1, (byte)130, z, z,z, (byte)2, (byte)2,
            (byte)2, z, z, z, z, z, z, z, z, z, z, z, z};
        response.setHeader("WWW-Authenticate", "NTLM " +
             new sun.misc.BASE64Encoder().encodeBuffer(msg1));
        response.sendError(response.SC_UNAUTHORIZED);
        return;
    }
    else if (msg[8] == 3)
    {
        off = 30;

        length = msg[off+17]*256 + msg[off+16];
        offset = msg[off+19]*256 + msg[off+18];
        String remoteHost = new String(msg, offset, length);

        length = msg[off+1]*256 + msg[off];
        offset = msg[off+3]*256 + msg[off+2];
        String domain = new String(msg, offset, length);

        length = msg[off+9]*256 + msg[off+8];
        offset = msg[off+11]*256 + msg[off+10];
        String username = new String(msg, offset, length);

        System.out.println("Username:"+username.replace(username.substring(1, 2), ""));
        System.out.println("RemoteHost:"+remoteHost.replace(remoteHost.substring(1, 2), ""));
        System.out.println("Domain:"+domain.replace(domain.substring(1, 2), ""));
    }
}