Examples with UnknownCredentials org.alfresco.repo.web.auth.UnknownCredentials used on opensource projects

Example 1 with UnknownCredentials

use of org.alfresco.repo.web.auth.UnknownCredentials in project alfresco-remote-api by Alfresco.

the class BaseNTLMAuthenticationFilter method processType3.

/**
 * Process a type 3 NTLM message
 *
 * @param type3Msg Type3NTLMMessage
 * @param req HttpServletRequest
 * @param res HttpServletResponse
 *
 * @exception IOException
 * @exception ServletException
 */
protected boolean processType3(Type3NTLMMessage type3Msg, ServletContext context, HttpServletRequest req, HttpServletResponse res) throws IOException, ServletException {
    Log logger = getLogger();
    if (logger.isDebugEnabled())
        logger.debug("Received type3 " + type3Msg);
    // Get the existing NTLM details
    NTLMLogonDetails ntlmDetails = null;
    SessionUser user = null;
    user = getSessionUser(context, req, res, true);
    HttpSession session = req.getSession();
    ntlmDetails = (NTLMLogonDetails) session.getAttribute(NTLM_AUTH_DETAILS);
    // Get the NTLM logon details
    String userName = type3Msg.getUserName();
    String workstation = type3Msg.getWorkstation();
    String domain = type3Msg.getDomain();
    // ALF-10997 fix, normalize the userName
    // the system runAs is acceptable because we are resolving a username i.e. it's a system-wide operation that does not need permission checks
    final String userName_f = userName;
    String normalized = transactionService.getRetryingTransactionHelper().doInTransaction(new RetryingTransactionHelper.RetryingTransactionCallback<String>() {

        public String execute() throws Throwable {
            return AuthenticationUtil.runAs(new AuthenticationUtil.RunAsWork<String>() {

                public String doWork() throws Exception {
                    String normalized = personService.getUserIdentifier(userName_f);
                    return normalized;
                }
            }, AuthenticationUtil.SYSTEM_USER_NAME);
        }
    }, true);
    if (normalized != null) {
        userName = normalized;
    }
    boolean authenticated = false;
    // Check if we are using cached details for the authentication
    if (user != null && ntlmDetails != null && ntlmDetails.hasNTLMHashedPassword()) {
        // Check if the received NTLM hashed password matches the cached password
        byte[] ntlmPwd = type3Msg.getNTLMHash();
        byte[] cachedPwd = ntlmDetails.getNTLMHashedPassword();
        if (ntlmPwd != null) {
            authenticated = Arrays.equals(cachedPwd, ntlmPwd);
        }
        if (logger.isDebugEnabled())
            logger.debug("Using cached NTLM hash, authenticated = " + authenticated);
        onValidate(context, req, res, new NTLMCredentials(userName, ntlmPwd));
        // Allow the user to access the requested page
        return true;
    } else {
        WebCredentials credentials;
        // Check if we are using local MD4 password hashes or passthru authentication
        if (nltmAuthenticator.getNTLMMode() == NTLMMode.MD4_PROVIDER) {
            // Check if guest logons are allowed and this is a guest logon
            if (m_allowGuest && userName.equalsIgnoreCase(authenticationComponent.getGuestUserName())) {
                credentials = new GuestCredentials();
                // Indicate that the user has been authenticated
                authenticated = true;
                if (getLogger().isDebugEnabled())
                    getLogger().debug("Guest logon");
            } else {
                // Get the stored MD4 hashed password for the user, or null if the user does not exist
                String md4hash = getMD4Hash(userName);
                if (md4hash != null) {
                    authenticated = validateLocalHashedPassword(type3Msg, ntlmDetails, authenticated, md4hash);
                    credentials = new NTLMCredentials(ntlmDetails.getUserName(), ntlmDetails.getNTLMHashedPassword());
                } else {
                    // Check if unknown users should be logged on as guest
                    if (m_mapUnknownUserToGuest) {
                        // Reset the user name to be the guest user
                        userName = authenticationComponent.getGuestUserName();
                        authenticated = true;
                        credentials = new GuestCredentials();
                        if (logger.isDebugEnabled())
                            logger.debug("User " + userName + " logged on as guest, no Alfresco account");
                    } else {
                        if (logger.isDebugEnabled())
                            logger.debug("User " + userName + " does not have Alfresco account");
                        // Bypass NTLM authentication and display the logon screen,
                        // as user account does not exist in Alfresco
                        credentials = new UnknownCredentials();
                        authenticated = false;
                    }
                }
            }
        } else {
            credentials = new NTLMCredentials(type3Msg.getUserName(), type3Msg.getNTLMHash());
            // Determine if the client sent us NTLMv1 or NTLMv2
            if (type3Msg.hasFlag(NTLM.Flag128Bit) && type3Msg.hasFlag(NTLM.FlagNTLM2Key) || (type3Msg.getNTLMHash() != null && type3Msg.getNTLMHash().length > 24)) {
                // Cannot accept NTLMv2 if we are using passthru auth
                if (logger.isErrorEnabled())
                    logger.error("Client " + workstation + " using NTLMv2 logon, not valid with passthru authentication");
            } else {
                if (ntlmDetails == null) {
                    if (logger.isWarnEnabled())
                        logger.warn("Authentication failed: NTLM details can not be retrieved from session. Client must support cookies.");
                    restartLoginChallenge(context, req, res);
                    return false;
                }
                // Passthru mode, send the hashed password details to the passthru authentication server
                NTLMPassthruToken authToken = (NTLMPassthruToken) ntlmDetails.getAuthenticationToken();
                authToken.setUserAndPassword(type3Msg.getUserName(), type3Msg.getNTLMHash(), PasswordEncryptor.NTLM1);
                try {
                    // Run the second stage of the passthru authentication
                    nltmAuthenticator.authenticate(authToken);
                    authenticated = true;
                    // Check if the user has been logged on as guest
                    if (authToken.isGuestLogon()) {
                        userName = authenticationComponent.getGuestUserName();
                    }
                    // Set the authentication context
                    authenticationComponent.setCurrentUser(userName);
                } catch (BadCredentialsException ex) {
                    if (logger.isDebugEnabled())
                        logger.debug("Authentication failed, " + ex.getMessage());
                } catch (AuthenticationException ex) {
                    if (logger.isDebugEnabled())
                        logger.debug("Authentication failed, " + ex.getMessage());
                } finally {
                    // Clear the authentication token from the NTLM details
                    ntlmDetails.setAuthenticationToken(null);
                }
            }
        }
        // Check if the user has been authenticated, if so then setup the user environment
        if (authenticated == true) {
            boolean userInit = false;
            if (user == null) {
                try {
                    user = createUserEnvironment(session, userName);
                    userInit = true;
                } catch (AuthenticationException ex) {
                    if (logger.isDebugEnabled())
                        logger.debug("Failed to validate user " + userName, ex);
                    onValidateFailed(context, req, res, session, credentials);
                    return false;
                }
            }
            onValidate(context, req, res, credentials);
            // Update the NTLM logon details in the session
            String srvName = getServerName();
            if (ntlmDetails == null) {
                // No cached NTLM details
                ntlmDetails = new NTLMLogonDetails(userName, workstation, domain, false, srvName);
                ntlmDetails.setNTLMHashedPassword(type3Msg.getNTLMHash());
                session.setAttribute(NTLM_AUTH_DETAILS, ntlmDetails);
                if (logger.isDebugEnabled())
                    logger.debug("No cached NTLM details, created");
            } else {
                // Update the cached NTLM details
                ntlmDetails.setDetails(userName, workstation, domain, false, srvName);
                ntlmDetails.setNTLMHashedPassword(type3Msg.getNTLMHash());
                if (logger.isDebugEnabled())
                    logger.debug("Updated cached NTLM details");
            }
            if (logger.isDebugEnabled())
                logger.debug("User logged on via NTLM, " + ntlmDetails);
            if (onLoginComplete(context, req, res, userInit)) {
                // Allow the user to access the requested page
                return true;
            }
        } else {
            restartLoginChallenge(context, req, res);
        }
    }
    return false;
}