From 1684c8f398922065a97e7da4dac4ac6a33cc5218 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Parm=C3=A9nides=20GV?= Date: Wed, 9 Apr 2014 16:03:55 +0200 Subject: Back to the standard "app" module. This return to "app" instead of "bitmask_android" is due to this reading: https://developer.android.com/sdk/installing/studio-build.html#projectStructure I'll have to tweak the final apk name in build.gradle. --- .../se/leap/openvpn/OpenVpnManagementThread.java | 592 +++++++++++++++++++++ 1 file changed, 592 insertions(+) create mode 100644 app/src/main/java/se/leap/openvpn/OpenVpnManagementThread.java (limited to 'app/src/main/java/se/leap/openvpn/OpenVpnManagementThread.java') diff --git a/app/src/main/java/se/leap/openvpn/OpenVpnManagementThread.java b/app/src/main/java/se/leap/openvpn/OpenVpnManagementThread.java new file mode 100644 index 00000000..27a3db65 --- /dev/null +++ b/app/src/main/java/se/leap/openvpn/OpenVpnManagementThread.java @@ -0,0 +1,592 @@ +package se.leap.openvpn; + +import java.io.FileDescriptor; +import java.io.IOException; +import java.io.InputStream; +import java.lang.reflect.InvocationTargetException; +import java.lang.reflect.Method; +import java.net.InetSocketAddress; +import java.net.SocketAddress; +import java.security.InvalidKeyException; +import java.security.NoSuchAlgorithmException; +import java.security.PrivateKey; +import java.util.LinkedList; +import java.util.Vector; + +import javax.crypto.BadPaddingException; +import javax.crypto.Cipher; +import javax.crypto.IllegalBlockSizeException; +import javax.crypto.NoSuchPaddingException; + +import se.leap.bitmaskclient.R; +import android.content.SharedPreferences; +import android.net.LocalServerSocket; +import android.net.LocalSocket; +import android.os.Build; +import android.os.ParcelFileDescriptor; +import android.preference.PreferenceManager; +import android.util.Base64; +import android.util.Log; + +public class OpenVpnManagementThread implements Runnable { + + private static final String TAG = "openvpn"; + private LocalSocket mSocket; + private VpnProfile mProfile; + private OpenVpnService mOpenVPNService; + private LinkedList mFDList=new LinkedList(); + private int mBytecountinterval=2; + private long mLastIn=0; + private long mLastOut=0; + private LocalServerSocket mServerSocket; + private boolean mReleaseHold=true; + private boolean mWaitingForRelease=false; + private long mLastHoldRelease=0; + + private static Vector active=new Vector(); + + static private native void jniclose(int fdint); + static private native byte[] rsasign(byte[] input,int pkey) throws InvalidKeyException; + + public OpenVpnManagementThread(VpnProfile profile, LocalServerSocket mgmtsocket, OpenVpnService openVpnService) { + mProfile = profile; + mServerSocket = mgmtsocket; + mOpenVPNService = openVpnService; + + + SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(openVpnService); + boolean managemeNetworkState = prefs.getBoolean("netchangereconnect", true); + if(managemeNetworkState) + mReleaseHold=false; + + } + + static { + System.loadLibrary("opvpnutil"); + } + + public void managmentCommand(String cmd) { + if(mSocket!=null) { + try { + mSocket.getOutputStream().write(cmd.getBytes()); + mSocket.getOutputStream().flush(); + } catch (IOException e) { + // Ignore socket stack traces + } + } + } + + + @Override + public void run() { + Log.i(TAG, "Managment Socket Thread started"); + byte [] buffer =new byte[2048]; + // mSocket.setSoTimeout(5); // Setting a timeout cannot be that bad + + String pendingInput=""; + active.add(this); + + try { + // Wait for a client to connect + mSocket= mServerSocket.accept(); + InputStream instream = mSocket.getInputStream(); + + while(true) { + int numbytesread = instream.read(buffer); + if(numbytesread==-1) + return; + + FileDescriptor[] fds = null; + try { + fds = mSocket.getAncillaryFileDescriptors(); + } catch (IOException e) { + OpenVPN.logMessage(0, "", "Error reading fds from socket" + e.getLocalizedMessage()); + e.printStackTrace(); + } + if(fds!=null){ + + for (FileDescriptor fd : fds) { + + mFDList.add(fd); + } + } + + String input = new String(buffer,0,numbytesread,"UTF-8"); + + pendingInput += input; + + pendingInput=processInput(pendingInput); + + + + } + } catch (IOException e) { + e.printStackTrace(); + } + active.remove(this); + } + + //! Hack O Rama 2000! + private void protectFileDescriptor(FileDescriptor fd) { + Exception exp=null; + try { + Method getInt = FileDescriptor.class.getDeclaredMethod("getInt$"); + int fdint = (Integer) getInt.invoke(fd); + + // You can even get more evil by parsing toString() and extract the int from that :) + + mOpenVPNService.protect(fdint); + + //ParcelFileDescriptor pfd = ParcelFileDescriptor.fromFd(fdint); + //pfd.close(); + jniclose(fdint); + return; + } catch (NoSuchMethodException e) { + exp =e; + } catch (IllegalArgumentException e) { + exp =e; + } catch (IllegalAccessException e) { + exp =e; + } catch (InvocationTargetException e) { + exp =e; + } catch (NullPointerException e) { + exp =e; + } + if(exp!=null) { + exp.printStackTrace(); + Log.d("Openvpn", "Failed to retrieve fd from socket: " + fd); + OpenVPN.logMessage(0, "", "Failed to retrieve fd from socket: " + exp.getLocalizedMessage()); + } + } + + private String processInput(String pendingInput) { + + + while(pendingInput.contains("\n")) { + String[] tokens = pendingInput.split("\\r?\\n", 2); + processCommand(tokens[0]); + if(tokens.length == 1) + // No second part, newline was at the end + pendingInput=""; + else + pendingInput=tokens[1]; + } + return pendingInput; + } + + + private void processCommand(String command) { + Log.d(TAG, "processCommand: " + command); + + if (command.startsWith(">") && command.contains(":")) { + String[] parts = command.split(":",2); + String cmd = parts[0].substring(1); + String argument = parts[1]; + if(cmd.equals("INFO")) { + // Ignore greeting from mgmt + //logStatusMessage(command); + }else if (cmd.equals("PASSWORD")) { + processPWCommand(argument); + } else if (cmd.equals("HOLD")) { + handleHold(); + } else if (cmd.equals("NEED-OK")) { + processNeedCommand(argument); + } else if (cmd.equals("BYTECOUNT")){ + processByteCount(argument); + } else if (cmd.equals("STATE")) { + processState(argument); + } else if (cmd.equals("FATAL")){ + processState(","+cmd+","); //handles FATAL as state + } else if (cmd.equals("PROXY")) { + processProxyCMD(argument); + } else if (cmd.equals("LOG")) { + String[] args = argument.split(",",3); + // 0 unix time stamp + // 1 log level N,I,E etc. + // 2 log message + OpenVPN.logMessage(0, "", args[2]); + } else if (cmd.equals("RSA_SIGN")) { + processSignCommand(argument); + } else { + OpenVPN.logMessage(0, "MGMT:", "Got unrecognized command" + command); + Log.i(TAG, "Got unrecognized command" + command); + } + } else if (command.startsWith("SUCCESS:")) { //Fixes bug LEAP #4565 + if (command.equals("SUCCESS: signal SIGINT thrown")){ + Log.d(TAG, "SUCCESS: signal SIGINT thrown"); + processState(",EXITING,SIGINT,,"); + } + } else { + Log.i(TAG, "Got unrecognized line from managment" + command); + OpenVPN.logMessage(0, "MGMT:", "Got unrecognized line from management:" + command); + } + } + private void handleHold() { + if(mReleaseHold) { + releaseHoldCmd(); + } else { + mWaitingForRelease=true; + OpenVPN.updateStateString("NONETWORK", "",R.string.state_nonetwork); + } + } + private void releaseHoldCmd() { + if ((System.currentTimeMillis()- mLastHoldRelease) < 5000) { + try { + Thread.sleep(3000); + } catch (InterruptedException e) {} + + } + mWaitingForRelease=false; + mLastHoldRelease = System.currentTimeMillis(); + managmentCommand("hold release\n"); + managmentCommand("bytecount " + mBytecountinterval + "\n"); + managmentCommand("state on\n"); + } + + public void releaseHold() { + mReleaseHold=true; + if(mWaitingForRelease) + releaseHoldCmd(); + + } + + private void processProxyCMD(String argument) { + String[] args = argument.split(",",3); + SocketAddress proxyaddr = ProxyDetection.detectProxy(mProfile); + + + if(args.length >= 2) { + String proto = args[1]; + if(proto.equals("UDP")) { + proxyaddr=null; + } + } + + if(proxyaddr instanceof InetSocketAddress ){ + InetSocketAddress isa = (InetSocketAddress) proxyaddr; + + OpenVPN.logInfo(R.string.using_proxy, isa.getHostName(),isa.getPort()); + + String proxycmd = String.format("proxy HTTP %s %d\n", isa.getHostName(),isa.getPort()); + managmentCommand(proxycmd); + } else { + managmentCommand("proxy NONE\n"); + } + + } + private void processState(String argument) { + String[] args = argument.split(",",3); + String currentstate = args[1]; + if(args[2].equals(",,")){ + OpenVPN.updateStateString(currentstate,""); + } + else if (args[2].endsWith(",,")){ //fixes LEAP Bug #4546 + args[2] = (String) args[2].subSequence(0, args[2].length()-2); + Log.d(TAG, "processState() STATE: "+ currentstate + " msg: " + args[2]); + OpenVPN.updateStateString(currentstate,args[2]); + } + else{ + OpenVPN.updateStateString(currentstate,args[2]); + } + } + + private static int repeated_byte_counts = 0; + private void processByteCount(String argument) { + // >BYTECOUNT:{BYTES_IN},{BYTES_OUT} + int comma = argument.indexOf(','); + long in = Long.parseLong(argument.substring(0, comma)); + long out = Long.parseLong(argument.substring(comma+1)); + + long diffin = in - mLastIn; + long diffout = out - mLastOut; + if(diffin == 0 && diffout == 0) + repeated_byte_counts++; + if(repeated_byte_counts > 3) + Log.d("OpenVPN log", "Repeated byte count = " + repeated_byte_counts); + mLastIn=in; + mLastOut=out; + + String netstat = String.format("In: %8s, %8s/s Out %8s, %8s/s", + humanReadableByteCount(in, false), + humanReadableByteCount(diffin, false), + humanReadableByteCount(out, false), + humanReadableByteCount(diffout, false)); + OpenVPN.updateStateString("BYTECOUNT",netstat); + + + } + + // From: http://stackoverflow.com/questions/3758606/how-to-convert-byte-size-into-human-readable-format-in-java + public static String humanReadableByteCount(long bytes, boolean si) { + int unit = si ? 1000 : 1024; + if (bytes < unit) return bytes + " B"; + int exp = (int) (Math.log(bytes) / Math.log(unit)); + String pre = (si ? "kMGTPE" : "KMGTPE").charAt(exp-1) + (si ? "" : "i"); + return String.format("%.1f %sB", bytes / Math.pow(unit, exp), pre); + } + + private void processNeedCommand(String argument) { + int p1 =argument.indexOf('\''); + int p2 = argument.indexOf('\'',p1+1); + + String needed = argument.substring(p1+1, p2); + String extra = argument.split(":",2)[1]; + + String status = "ok"; + + + if (needed.equals("PROTECTFD")) { + FileDescriptor fdtoprotect = mFDList.pollFirst(); + protectFileDescriptor(fdtoprotect); + } else if (needed.equals("DNSSERVER")) { + mOpenVPNService.addDNS(extra); + }else if (needed.equals("DNSDOMAIN")){ + mOpenVPNService.setDomain(extra); + } else if (needed.equals("ROUTE")) { + String[] routeparts = extra.split(" "); + mOpenVPNService.addRoute(routeparts[0], routeparts[1]); + } else if (needed.equals("ROUTE6")) { + mOpenVPNService.addRoutev6(extra); + } else if (needed.equals("IFCONFIG")) { + String[] ifconfigparts = extra.split(" "); + int mtu = Integer.parseInt(ifconfigparts[2]); + mOpenVPNService.setLocalIP(ifconfigparts[0], ifconfigparts[1],mtu,ifconfigparts[3]); + } else if (needed.equals("IFCONFIG6")) { + mOpenVPNService.setLocalIPv6(extra); + + } else if (needed.equals("OPENTUN")) { + if(sendTunFD(needed,extra)) + return; + else + status="cancel"; + // This not nice or anything but setFileDescriptors accepts only FilDescriptor class :( + + } else { + Log.e(TAG,"Unkown needok command " + argument); + return; + } + + String cmd = String.format("needok '%s' %s\n", needed, status); + managmentCommand(cmd); + } + + private boolean sendTunFD (String needed, String extra) { + Exception exp = null; + if(!extra.equals("tun")) { + // We only support tun + String errmsg = String.format("Devicetype %s requested, but only tun is possible with the Android API, sorry!",extra); + OpenVPN.logMessage(0, "", errmsg ); + + return false; + } + ParcelFileDescriptor pfd = mOpenVPNService.openTun(); + if(pfd==null) + return false; + + Method setInt; + int fdint = pfd.getFd(); + try { + setInt = FileDescriptor.class.getDeclaredMethod("setInt$",int.class); + FileDescriptor fdtosend = new FileDescriptor(); + + setInt.invoke(fdtosend,fdint); + + FileDescriptor[] fds = {fdtosend}; + mSocket.setFileDescriptorsForSend(fds); + + Log.d("Openvpn", "Sending FD tosocket: " + fdtosend + " " + fdint + " " + pfd); + // Trigger a send so we can close the fd on our side of the channel + // The API documentation fails to mention that it will not reset the file descriptor to + // be send and will happily send the file descriptor on every write ... + String cmd = String.format("needok '%s' %s\n", needed, "ok"); + managmentCommand(cmd); + + // Set the FileDescriptor to null to stop this mad behavior + mSocket.setFileDescriptorsForSend(null); + + pfd.close(); + + return true; + } catch (NoSuchMethodException e) { + exp =e; + } catch (IllegalArgumentException e) { + exp =e; + } catch (IllegalAccessException e) { + exp =e; + } catch (InvocationTargetException e) { + exp =e; + } catch (IOException e) { + exp =e; + } + if(exp!=null) { + OpenVPN.logMessage(0,"", "Could not send fd over socket:" + exp.getLocalizedMessage()); + exp.printStackTrace(); + } + return false; + } + + private void processPWCommand(String argument) { + //argument has the form Need 'Private Key' password + // or ">PASSWORD:Verification Failed: '%s' ['%s']" + String needed; + + + + try{ + + int p1 = argument.indexOf('\''); + int p2 = argument.indexOf('\'',p1+1); + needed = argument.substring(p1+1, p2); + if (argument.startsWith("Verification Failed")) { + proccessPWFailed(needed, argument.substring(p2+1)); + return; + } + } catch (StringIndexOutOfBoundsException sioob) { + OpenVPN.logMessage(0, "", "Could not parse management Password command: " + argument); + return; + } + + String pw=null; + + if(needed.equals("Private Key")) { + pw = mProfile.getPasswordPrivateKey(); + } else if (needed.equals("Auth")) { + String usercmd = String.format("username '%s' %s\n", + needed, VpnProfile.openVpnEscape(mProfile.mUsername)); + managmentCommand(usercmd); + pw = mProfile.getPasswordAuth(); + } + if(pw!=null) { + String cmd = String.format("password '%s' %s\n", needed, VpnProfile.openVpnEscape(pw)); + managmentCommand(cmd); + } else { + OpenVPN.logMessage(0, OpenVPN.MANAGMENT_PREFIX, String.format("Openvpn requires Authentication type '%s' but no password/key information available", needed)); + } + + } + + + + + private void proccessPWFailed(String needed, String args) { + OpenVPN.updateStateString("AUTH_FAILED", needed + args,R.string.state_auth_failed); + } + private void logStatusMessage(String command) { + OpenVPN.logMessage(0,"MGMT:", command); + } + + + public static boolean stopOpenVPN() { + boolean sendCMD=false; + for (OpenVpnManagementThread mt: active){ + mt.managmentCommand("signal SIGINT\n"); + sendCMD=true; + try { + if(mt.mSocket !=null) + mt.mSocket.close(); + } catch (IOException e) { + // Ignore close error on already closed socket + } + } + return sendCMD; + } + + public void signalusr1() { + mReleaseHold=false; + if(!mWaitingForRelease) + managmentCommand("signal SIGUSR1\n"); + } + + public void reconnect() { + signalusr1(); + releaseHold(); + } + + private void processSignCommand(String b64data) { + + PrivateKey privkey = mProfile.getKeystoreKey(); + Exception err =null; + + byte[] data = Base64.decode(b64data, Base64.DEFAULT); + + // The Jelly Bean *evil* Hack + // 4.2 implements the RSA/ECB/PKCS1PADDING in the OpenSSLprovider + if(Build.VERSION.SDK_INT==16){ + processSignJellyBeans(privkey,data); + return; + } + + + try{ + + + Cipher rsasinger = Cipher.getInstance("RSA/ECB/PKCS1PADDING"); + + rsasinger.init(Cipher.ENCRYPT_MODE, privkey); + + byte[] signed_bytes = rsasinger.doFinal(data); + String signed_string = Base64.encodeToString(signed_bytes, Base64.NO_WRAP); + managmentCommand("rsa-sig\n"); + managmentCommand(signed_string); + managmentCommand("\nEND\n"); + } catch (NoSuchAlgorithmException e){ + err =e; + } catch (InvalidKeyException e) { + err =e; + } catch (NoSuchPaddingException e) { + err =e; + } catch (IllegalBlockSizeException e) { + err =e; + } catch (BadPaddingException e) { + err =e; + } + if(err !=null) { + OpenVPN.logError(R.string.error_rsa_sign,err.getClass().toString(),err.getLocalizedMessage()); + } + + } + + + private void processSignJellyBeans(PrivateKey privkey, byte[] data) { + Exception err =null; + try { + Method[] allm = privkey.getClass().getSuperclass().getDeclaredMethods(); + System.out.println(allm); + Method getKey = privkey.getClass().getSuperclass().getDeclaredMethod("getOpenSSLKey"); + getKey.setAccessible(true); + + // Real object type is OpenSSLKey + Object opensslkey = getKey.invoke(privkey); + + getKey.setAccessible(false); + + Method getPkeyContext = opensslkey.getClass().getDeclaredMethod("getPkeyContext"); + + // integer pointer to EVP_pkey + getPkeyContext.setAccessible(true); + int pkey = (Integer) getPkeyContext.invoke(opensslkey); + getPkeyContext.setAccessible(false); + + byte[] signed_bytes = rsasign(data, pkey); + String signed_string = Base64.encodeToString(signed_bytes, Base64.NO_WRAP); + managmentCommand("rsa-sig\n"); + managmentCommand(signed_string); + managmentCommand("\nEND\n"); + + } catch (NoSuchMethodException e) { + err=e; + } catch (IllegalArgumentException e) { + err=e; + } catch (IllegalAccessException e) { + err=e; + } catch (InvocationTargetException e) { + err=e; + } catch (InvalidKeyException e) { + err=e; + } + if(err !=null) { + OpenVPN.logError(R.string.error_rsa_sign,err.getClass().toString(),err.getLocalizedMessage()); + } + + } +} -- cgit v1.2.3