Examples with Exception com.tigervnc.rfb.Exception used on opensource projects

Example 1 with Exception

use of com.tigervnc.rfb.Exception in project tigervnc by TigerVNC.

the class Parameters method loadViewerParameters.

public static String loadViewerParameters(String filename) throws Exception {
    String servername = "";
    String filepath;
    if (filename == null) {
        return loadFromReg();
    /*
      String homeDir = FileUtils.getVncHomeDir();
      if (homeDir == null)
        throw new Exception("Failed to read configuration file, "+
                            "can't obtain home directory path.");
      filepath = homeDir.concat("default.tigervnc");
      */
    } else {
        filepath = filename;
    }
    /* Read parameters from file */
    File f = new File(filepath);
    if (!f.exists() || !f.canRead()) {
        if (filename == null || filename.isEmpty())
            return null;
        throw new Exception(String.format("Failed to read configuration file, can't open %s", filepath));
    }
    String line = "";
    LineNumberReader reader;
    try {
        reader = new LineNumberReader(new FileReader(f));
    } catch (FileNotFoundException e) {
        throw new Exception(e.getMessage());
    }
    int lineNr = 0;
    while (line != null) {
        // Read the next line
        try {
            line = reader.readLine();
            lineNr = reader.getLineNumber();
            if (line == null)
                break;
        } catch (IOException e) {
            throw new Exception(String.format("Failed to read line %d in file %s: %s", lineNr, filepath, e.getMessage()));
        }
        // Make sure that the first line of the file has the file identifier string
        if (lineNr == 1) {
            if (line.equals(IDENTIFIER_STRING))
                continue;
            else
                throw new Exception(String.format("Configuration file %s is in an invalid format", filename));
        }
        // Skip empty lines and comments
        if (line.trim().isEmpty() || line.trim().startsWith("#"))
            continue;
        // Find the parameter value
        int idx = line.indexOf("=");
        if (idx == -1) {
            vlog.error(String.format("Failed to read line %d in file %s: %s", lineNr, filename, "Invalid format"));
            continue;
        }
        String value = line.substring(idx + 1).trim();
        // Will be set to false below if
        boolean invalidParameterName = true;
        if (line.substring(0, idx).trim().equalsIgnoreCase("ServerName")) {
            if (value.length() > 256) {
                vlog.error(String.format("Failed to read line %d in file %s: %s", lineNr, filepath, "Invalid format or too large value"));
                continue;
            }
            servername = value;
            invalidParameterName = false;
        } else {
            for (int i = 0; i < parameterArray.length; i++) {
                if (parameterArray[i] instanceof StringParameter) {
                    if (line.substring(0, idx).trim().equalsIgnoreCase(parameterArray[i].getName())) {
                        if (value.length() > 256) {
                            vlog.error(String.format("Failed to read line %d in file %s: %s", lineNr, filepath, "Invalid format or too large value"));
                            continue;
                        }
                        ((StringParameter) parameterArray[i]).setParam(value);
                        invalidParameterName = false;
                    }
                } else if (parameterArray[i] instanceof IntParameter) {
                    if (line.substring(0, idx).trim().equalsIgnoreCase(parameterArray[i].getName())) {
                        ((IntParameter) parameterArray[i]).setParam(value);
                        invalidParameterName = false;
                    }
                } else if (parameterArray[i] instanceof BoolParameter) {
                    if (line.substring(0, idx).trim().equalsIgnoreCase(parameterArray[i].getName())) {
                        ((BoolParameter) parameterArray[i]).setParam(value);
                        invalidParameterName = false;
                    }
                } else {
                    vlog.error(String.format("Unknown parameter type for parameter %s", parameterArray[i].getName()));
                }
            }
        }
        if (invalidParameterName)
            vlog.info(String.format("Unknown parameter %s on line %d in file %s", line, lineNr, filepath));
    }
    try {
        reader.close();
    } catch (IOException e) {
        vlog.info(e.getMessage());
    } finally {
        try {
            if (reader != null)
                reader.close();
        } catch (IOException e) {
        }
    }
    return servername;
}

Example 2 with Exception

use of com.tigervnc.rfb.Exception in project tigervnc by TigerVNC.

the class Parameters method saveViewerParameters.

public static void saveViewerParameters(String filename, String servername) {
    // Write to the registry or a predefined file if no filename was specified.
    String filepath;
    if (filename == null || filename.isEmpty()) {
        saveToReg(servername);
        return;
    /*
      String homeDir = FileUtils.getVncHomeDir();
      if (homeDir == null)
        throw new Exception("Failed to read configuration file, "+
                            "can't obtain home directory path.");
      filepath = homeDir.concat("default.tigervnc");
      */
    } else {
        filepath = filename;
    }
    /* Write parameters to file */
    File f = new File(filepath);
    if (f.exists() && !f.canWrite())
        throw new Exception(String.format("Failed to write configuration file," + "can't open %s", filepath));
    PrintWriter pw = null;
    try {
        pw = new PrintWriter(f, "UTF-8");
    } catch (java.lang.Exception e) {
        throw new Exception(e.getMessage());
    }
    pw.println(IDENTIFIER_STRING);
    pw.println("");
    if (servername != null && !servername.isEmpty()) {
        pw.println(String.format("ServerName=%s\n", servername));
        updateConnHistory(servername);
    }
    for (int i = 0; i < parameterArray.length; i++) {
        if (parameterArray[i] instanceof StringParameter) {
            // if (line.substring(0,idx).trim().equalsIgnoreCase(parameterArray[i].getName()))
            pw.println(String.format("%s=%s", parameterArray[i].getName(), parameterArray[i].getValueStr()));
        } else if (parameterArray[i] instanceof IntParameter) {
            // if (line.substring(0,idx).trim().equalsIgnoreCase(parameterArray[i].getName()))
            pw.println(String.format("%s=%s", parameterArray[i].getName(), parameterArray[i].getValueStr()));
        } else if (parameterArray[i] instanceof BoolParameter) {
            // if (line.substring(0,idx).trim().equalsIgnoreCase(parameterArray[i].getName()))
            pw.println(String.format("%s=%s", parameterArray[i].getName(), parameterArray[i].getValueStr()));
        } else {
            vlog.error(String.format("Unknown parameter type for parameter %s", parameterArray[i].getName()));
        }
    }
    pw.flush();
    pw.close();
}

Example 3 with Exception

use of com.tigervnc.rfb.Exception in project tigervnc by TigerVNC.

the class Tunnel method isTunnelReady.

private static boolean isTunnelReady(int localPort) throws Exception {
    // test the local forwarding socket to make
    // sure the tunnel is up before connecting
    SocketAddress sockAddr = new InetSocketAddress("localhost", localPort);
    java.net.Socket socket = new java.net.Socket();
    boolean ready = false;
    try {
        socket.connect(sockAddr, 1000);
        ready = socket.isConnected();
        socket.close();
    } catch (IOException e) {
    // expected until tunnel is up
    } catch (java.lang.Exception e) {
        throw new Exception(e.getMessage());
    }
    return ready;
}

Example 4 with Exception

use of com.tigervnc.rfb.Exception in project tigervnc by TigerVNC.

the class Tunnel method fillCmdPattern.

private static String fillCmdPattern(String pattern, String gatewayHost, String remoteHost, int remotePort, int localPort) {
    boolean H_found = false, G_found = false, R_found = false, L_found = false;
    boolean P_found = false;
    String cmd = extSSHClient.getValue() + " ";
    pattern.replaceAll("^\\s+", "");
    String user = getSshUser();
    int sshPort = getSshPort();
    gatewayHost = user + "@" + gatewayHost;
    for (int i = 0; i < pattern.length(); i++) {
        if (pattern.charAt(i) == '%') {
            switch(pattern.charAt(++i)) {
                case 'H':
                    cmd += remoteHost;
                    H_found = true;
                    continue;
                case 'G':
                    cmd += gatewayHost;
                    G_found = true;
                    continue;
                case 'R':
                    cmd += remotePort;
                    R_found = true;
                    continue;
                case 'L':
                    cmd += localPort;
                    L_found = true;
                    continue;
                case 'P':
                    cmd += sshPort;
                    P_found = true;
                    continue;
            }
        }
        cmd += pattern.charAt(i);
    }
    if (pattern.length() > 1024)
        throw new Exception("Tunneling command is too long.");
    if (!H_found || !R_found || !L_found)
        throw new Exception("%H, %R or %L absent in tunneling command template.");
    if (!tunnel.getValue() && !G_found)
        throw new Exception("%G pattern absent in tunneling command template.");
    vlog.info("SSH command line: " + cmd);
    if (VncViewer.os.startsWith("windows"))
        cmd.replaceAll("\\\\", "\\\\\\\\");
    return cmd;
}

Example 5 with Exception

use of com.tigervnc.rfb.Exception in project tigervnc by TigerVNC.

the class Tunnel method createTunnelJSch.

private static void createTunnelJSch(String gatewayHost, String remoteHost, int remotePort, int localPort) throws Exception {
    JSch.setLogger(new MyJSchLogger());
    JSch jsch = new JSch();
    try {
        // NOTE: jsch does not support all ciphers.  User may be
        // prompted to accept host key authenticy even if
        // the key is in the known_hosts file.
        File knownHosts = new File(FileUtils.getHomeDir() + ".ssh" + FileUtils.getFileSeparator() + "known_hosts");
        if (knownHosts.exists() && knownHosts.canRead())
            jsch.setKnownHosts(knownHosts.getAbsolutePath());
        ArrayList<File> privateKeys = new ArrayList<File>();
        if (!getSshKey().isEmpty()) {
            byte[] keyPass = null, key;
            if (!sshKeyPass.getValue().isEmpty())
                keyPass = sshKeyPass.getValue().getBytes();
            jsch.addIdentity("TigerVNC", getSshKey().getBytes(), null, keyPass);
        } else if (!getSshKeyFile().isEmpty()) {
            File f = new File(getSshKeyFile());
            if (!f.exists() || !f.canRead())
                throw new Exception("Cannot access SSH key file " + getSshKeyFile());
            privateKeys.add(f);
        }
        for (Iterator<File> i = privateKeys.iterator(); i.hasNext(); ) {
            File privateKey = (File) i.next();
            if (privateKey.exists() && privateKey.canRead())
                if (!sshKeyPass.getValue().isEmpty())
                    jsch.addIdentity(privateKey.getAbsolutePath(), sshKeyPass.getValue());
                else
                    jsch.addIdentity(privateKey.getAbsolutePath());
        }
        String user = getSshUser();
        String label = new String("SSH Authentication");
        PasswdDialog dlg = new PasswdDialog(label, (user == null ? false : true), false);
        dlg.userEntry.setText(user != null ? user : "");
        File ssh_config = new File(sshConfig.getValue());
        if (ssh_config.exists() && ssh_config.canRead()) {
            ConfigRepository repo = OpenSSHConfig.parse(ssh_config.getAbsolutePath());
            jsch.setConfigRepository(repo);
        }
        Session session = jsch.getSession(user, gatewayHost, getSshPort());
        session.setUserInfo(dlg);
        // OpenSSHConfig doesn't recognize StrictHostKeyChecking
        if (session.getConfig("StrictHostKeyChecking") == null)
            session.setConfig("StrictHostKeyChecking", "ask");
        session.connect();
        if (gatewayHost.equals(remoteHost))
            session.setPortForwardingL(localPort, new String("localhost"), remotePort);
        else
            session.setPortForwardingL(localPort, remoteHost, remotePort);
    } catch (java.lang.Exception e) {
        throw new Exception(e.getMessage());
    }
}