public String generateType3Msg(
final String username,
final String password,
final String domain,
final String workstation,
final String challenge)
throws NTLMEngineException {
Type2Message type2Message;
try {
type2Message = new Type2Message(Base64.decode(challenge));
} catch (final IOException exception) {
throw new NTLMEngineException("Invalid NTLM type 2 message", exception);
}
final int type2Flags = type2Message.getFlags();
final int type3Flags =
type2Flags
& (0xffffffff
^ (NtlmFlags.NTLMSSP_TARGET_TYPE_DOMAIN | NtlmFlags.NTLMSSP_TARGET_TYPE_SERVER));
final Type3Message type3Message =
new Type3Message(type2Message, password, domain, username, workstation, type3Flags);
return Base64.encode(type3Message.toByteArray());
}
@Override
protected void processFilter(
HttpServletRequest request, HttpServletResponse response, FilterChain filterChain)
throws Exception {
// Type 1 NTLM requests from browser can (and should) always immediately
// be replied to with an Type 2 NTLM response, no matter whether we're
// yet logging in or whether it is much later in the session.
HttpSession session = request.getSession(false);
long companyId = PortalInstances.getCompanyId(request);
String authorization = GetterUtil.getString(request.getHeader(HttpHeaders.AUTHORIZATION));
if (authorization.startsWith("NTLM")) {
NtlmManager ntlmManager = getNtlmManager(companyId);
String portalCacheKey = getPortalCacheKey(request);
byte[] src = Base64.decode(authorization.substring(5));
if (src[8] == 1) {
byte[] serverChallenge = new byte[8];
BigEndianCodec.putLong(serverChallenge, 0, SecureRandomUtil.nextLong());
byte[] challengeMessage = ntlmManager.negotiate(src, serverChallenge);
authorization = Base64.encode(challengeMessage);
response.setContentLength(0);
response.setHeader(HttpHeaders.WWW_AUTHENTICATE, "NTLM " + authorization);
response.setStatus(HttpServletResponse.SC_UNAUTHORIZED);
response.flushBuffer();
_portalCache.put(portalCacheKey, serverChallenge);
// Interrupt filter chain, send response. Browser will
// immediately post a new request.
return;
}
byte[] serverChallenge = _portalCache.get(portalCacheKey);
if (serverChallenge == null) {
response.setContentLength(0);
response.setHeader(HttpHeaders.WWW_AUTHENTICATE, "NTLM");
response.setStatus(HttpServletResponse.SC_UNAUTHORIZED);
response.flushBuffer();
return;
}
NtlmUserAccount ntlmUserAccount = null;
try {
ntlmUserAccount = ntlmManager.authenticate(src, serverChallenge);
} catch (Exception e) {
if (_log.isErrorEnabled()) {
_log.error("Unable to perform NTLM authentication", e);
}
} finally {
_portalCache.remove(portalCacheKey);
}
if (ntlmUserAccount == null) {
response.setContentLength(0);
response.setHeader(HttpHeaders.WWW_AUTHENTICATE, "NTLM");
response.setStatus(HttpServletResponse.SC_UNAUTHORIZED);
response.flushBuffer();
return;
}
if (_log.isDebugEnabled()) {
_log.debug("NTLM remote user " + ntlmUserAccount.getUserName());
}
request.setAttribute(NtlmWebKeys.NTLM_REMOTE_USER, ntlmUserAccount.getUserName());
if (session != null) {
session.setAttribute(NtlmWebKeys.NTLM_USER_ACCOUNT, ntlmUserAccount);
}
}
String path = request.getPathInfo();
if ((path != null) && path.endsWith("/login")) {
NtlmUserAccount ntlmUserAccount = null;
if (session != null) {
ntlmUserAccount = (NtlmUserAccount) session.getAttribute(NtlmWebKeys.NTLM_USER_ACCOUNT);
}
if (ntlmUserAccount == null) {
response.setContentLength(0);
response.setHeader(HttpHeaders.WWW_AUTHENTICATE, "NTLM");
response.setStatus(HttpServletResponse.SC_UNAUTHORIZED);
response.flushBuffer();
return;
} else {
request.setAttribute(NtlmWebKeys.NTLM_REMOTE_USER, ntlmUserAccount.getUserName());
}
}
processFilter(NtlmPostFilter.class, request, response, filterChain);
}