/* Orlib is distributed under this license (aka the 3-clause BSD license) Copyright (c) 2009, Nathan Freitas, Orbot / The Guardian Project - http://openideals.com/guardian Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. * Neither the names of the copyright owners nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ package org.sufficientlysecure.keychain.util.orbot; import java.io.BufferedReader; import java.io.File; import java.io.IOException; import java.io.InputStreamReader; import java.io.OutputStreamWriter; import java.net.URLEncoder; import java.util.StringTokenizer; import android.util.Log; /** * This class has been taken from the NetCipher library * https://github.com/guardianproject/NetCipher */ public class TorServiceUtils { private final static String TAG = "TorUtils"; // various console cmds public final static String SHELL_CMD_CHMOD = "chmod"; public final static String SHELL_CMD_KILL = "kill -9"; public final static String SHELL_CMD_RM = "rm"; public final static String SHELL_CMD_PS = "ps"; public final static String SHELL_CMD_PIDOF = "pidof"; public final static String CHMOD_EXE_VALUE = "700"; public static boolean isRootPossible() { StringBuilder log = new StringBuilder(); try { // Check if Superuser.apk exists File fileSU = new File("/system/app/Superuser.apk"); if (fileSU.exists()) return true; fileSU = new File("/system/app/superuser.apk"); if (fileSU.exists()) return true; fileSU = new File("/system/bin/su"); if (fileSU.exists()) { String[] cmd = { "su" }; int exitCode = TorServiceUtils.doShellCommand(cmd, log, false, true); if (exitCode != 0) return false; else return true; } // Check for 'su' binary String[] cmd = { "which su" }; int exitCode = TorServiceUtils.doShellCommand(cmd, log, false, true); if (exitCode == 0) { Log.d(TAG, "root exists, but not sure about permissions"); return true; } } catch (IOException e) { // this means that there is no root to be had (normally) so we won't // log anything Log.e(TAG, "Error checking for root access", e); } catch (Exception e) { Log.e(TAG, "Error checking for root access", e); // this means that there is no root to be had (normally) } Log.e(TAG, "Could not acquire root permissions"); return false; } public static int findProcessId(String command) { int procId = -1; try { procId = findProcessIdWithPidOf(command); if (procId == -1) procId = findProcessIdWithPS(command); } catch (Exception e) { try { procId = findProcessIdWithPS(command); } catch (Exception e2) { Log.e(TAG, "Unable to get proc id for command: " + URLEncoder.encode(command), e2); } } return procId; } // use 'pidof' command public static int findProcessIdWithPidOf(String command) throws Exception { int procId = -1; Runtime r = Runtime.getRuntime(); Process procPs = null; String baseName = new File(command).getName(); // fix contributed my mikos on 2010.12.10 procPs = r.exec(new String[] { SHELL_CMD_PIDOF, baseName }); // procPs = r.exec(SHELL_CMD_PIDOF); BufferedReader reader = new BufferedReader(new InputStreamReader(procPs.getInputStream())); String line = null; while ((line = reader.readLine()) != null) { try { // this line should just be the process id procId = Integer.parseInt(line.trim()); break; } catch (NumberFormatException e) { Log.e("TorServiceUtils", "unable to parse process pid: " + line, e); } } return procId; } // use 'ps' command public static int findProcessIdWithPS(String command) throws Exception { int procId = -1; Runtime r = Runtime.getRuntime(); Process procPs = null; procPs = r.exec(SHELL_CMD_PS); BufferedReader reader = new BufferedReader(new InputStreamReader(procPs.getInputStream())); String line = null; while ((line = reader.readLine()) != null) { if (line.indexOf(' ' + command) != -1) { StringTokenizer st = new StringTokenizer(line, " "); st.nextToken(); // proc owner procId = Integer.parseInt(st.nextToken().trim()); break; } } return procId; } public static int doShellCommand(String[] cmds, StringBuilder log, boolean runAsRoot, boolean waitFor) throws Exception { Process proc = null; int exitCode = -1; if (runAsRoot) proc = Runtime.getRuntime().exec("su"); else proc = Runtime.getRuntime().exec("sh"); OutputStreamWriter out = new OutputStreamWriter(proc.getOutputStream()); for (int i = 0; i < cmds.length; i++) { // TorService.logMessage("executing shell cmd: " + cmds[i] + // "; runAsRoot=" + runAsRoot + ";waitFor=" + waitFor); out.write(cmds[i]); out.write("\n"); } out.flush(); out.write("exit\n"); out.flush(); if (waitFor) { final char buf[] = new char[10]; // Consume the "stdout" InputStreamReader reader = new InputStreamReader(proc.getInputStream()); int read = 0; while ((read = reader.read(buf)) != -1) { if (log != null) log.append(buf, 0, read); } // Consume the "stderr" reader = new InputStreamReader(proc.getErrorStream()); read = 0; while ((read = reader.read(buf)) != -1) { if (log != null) log.append(buf, 0, read); } exitCode = proc.waitFor(); } return exitCode; } }