如何在 Linux 上使用 Java 分解受密码保护的 7zip 存档?

Question

在我的项目中，我们需要从受密码保护的7zip存档中提取文件。
我的源代码如下：

try {
ProcessBuilder pb = new ProcessBuilder("7z", "e", "bootstrap.7z", "-so", "bootstrap.txt");
Process p = pb.start();
BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(p.getOutputStream()));
BufferedReader reader = new BufferedReader(new InputStreamReader(p.getInputStream()));
writer.write("password" + "n");
writer.flush();
writer.close();
String line = null;
while ((line = br.readLine()) != null) {
System.out.println(line);
}
} catch  (IOException e) {
e.printStackTrace();
}

上面的代码块不起作用。
虽然我已经通过 BufferedWriter 传递了密码，但我在运行 java 程序时仍然需要手动输入密码。

出于安全原因，创建子进程时我不能使用参数"-p"将密码传递给7z(如果进程"7z"挂起，客户可以通过命令"ps aux |格雷普 7z")。

你能找出我的代码中的问题吗？ 我的java版本是1.8，操作系统是Ubuntu 16.04。

欣赏。

Answer 1

你不能使用 std.out键入某些命令行程序，因为它们不读取 std.out，它们只读取在键盘上输入的符号。我相信当您使用命令行输入 7z 的密码时就是这种情况。为了能够输入此密码，您需要启动控制台窗口，然后模仿键盘的行为，因此就像有人真的在窗口中键入一样。您可以使用java Robot类来执行此操作。我有一个包含机器人的Keyborad类，以简化打字过程。请注意，在系统上的键盘类中，某些特殊字符可能需要以不同的方式键入，因此您需要调整此设置。以下是一些伪代码(适用于 Windows，但应该很容易将其转换为 linux)适用于您的案例和键盘.java实现：

public static void run7z() throws IOException, InterruptedException {
startCommandLineShell();
waitABit();
keyboard.type("7z.exe e bootstrap.7z -so bootstrap.txt").enter();
waitABit();
keyboard.type("yourSecretPasswordHere").enter();
}
private static void startCommandLineShell() throws IOException {
Runtime.getRuntime().exec(new String[] { "C:\Windows\system32\cmd.exe", "/C", "start" });
}

和键盘类：

import java.awt.AWTException;
import java.awt.Robot;
import java.awt.event.KeyEvent;
public class Keyboard {
private Robot robot;
public static void main(String... args) throws Exception 
{
Keyboard keyboard = new Keyboard();
keyboard.type("~!@#$%^&*()_+");
}
public Keyboard()
{
try {
this.robot = new Robot();
robot.delay(500);
robot.setAutoDelay(2);
robot.setAutoWaitForIdle(true);
} catch (AWTException e) {
throw new RuntimeException(e);
}
}
public Keyboard(Robot robot) 
{
this.robot = robot;
}
public Keyboard type(CharSequence characters) 
{
int length = characters.length();
for (int i = 0; i < length; i++) 
{
char character = characters.charAt(i);
type(character);
}
return this;
}
public void enter()
{
robot.keyPress(KeyEvent.VK_ENTER);
}
public void type(char character) 
{
try {
switch (character) {
case 'a': doType(KeyEvent.VK_A); break;
case 'b': doType(KeyEvent.VK_B); break;
case 'c': doType(KeyEvent.VK_C); break;
case 'd': doType(KeyEvent.VK_D); break;
case 'e': doType(KeyEvent.VK_E); break;
case 'f': doType(KeyEvent.VK_F); break;
case 'g': doType(KeyEvent.VK_G); break;
case 'h': doType(KeyEvent.VK_H); break;
case 'i': doType(KeyEvent.VK_I); break;
case 'j': doType(KeyEvent.VK_J); break;
case 'k': doType(KeyEvent.VK_K); break;
case 'l': doType(KeyEvent.VK_L); break;
case 'm': doType(KeyEvent.VK_M); break;
case 'n': doType(KeyEvent.VK_N); break;
case 'o': doType(KeyEvent.VK_O); break;
case 'p': doType(KeyEvent.VK_P); break;
case 'q': doType(KeyEvent.VK_Q); break;
case 'r': doType(KeyEvent.VK_R); break;
case 's': doType(KeyEvent.VK_S); break;
case 't': doType(KeyEvent.VK_T); break;
case 'u': doType(KeyEvent.VK_U); break;
case 'v': doType(KeyEvent.VK_V); break;
case 'w': doType(KeyEvent.VK_W); break;
case 'x': doType(KeyEvent.VK_X); break;
case 'y': doType(KeyEvent.VK_Y); break;
case 'z': doType(KeyEvent.VK_Z); break;
case 'A': doType(KeyEvent.VK_SHIFT, KeyEvent.VK_A); break;
case 'B': doType(KeyEvent.VK_SHIFT, KeyEvent.VK_B); break;
case 'C': doType(KeyEvent.VK_SHIFT, KeyEvent.VK_C); break;
case 'D': doType(KeyEvent.VK_SHIFT, KeyEvent.VK_D); break;
case 'E': doType(KeyEvent.VK_SHIFT, KeyEvent.VK_E); break;
case 'F': doType(KeyEvent.VK_SHIFT, KeyEvent.VK_F); break;
case 'G': doType(KeyEvent.VK_SHIFT, KeyEvent.VK_G); break;
case 'H': doType(KeyEvent.VK_SHIFT, KeyEvent.VK_H); break;
case 'I': doType(KeyEvent.VK_SHIFT, KeyEvent.VK_I); break;
case 'J': doType(KeyEvent.VK_SHIFT, KeyEvent.VK_J); break;
case 'K': doType(KeyEvent.VK_SHIFT, KeyEvent.VK_K); break;
case 'L': doType(KeyEvent.VK_SHIFT, KeyEvent.VK_L); break;
case 'M': doType(KeyEvent.VK_SHIFT, KeyEvent.VK_M); break;
case 'N': doType(KeyEvent.VK_SHIFT, KeyEvent.VK_N); break;
case 'O': doType(KeyEvent.VK_SHIFT, KeyEvent.VK_O); break;
case 'P': doType(KeyEvent.VK_SHIFT, KeyEvent.VK_P); break;
case 'Q': doType(KeyEvent.VK_SHIFT, KeyEvent.VK_Q); break;
case 'R': doType(KeyEvent.VK_SHIFT, KeyEvent.VK_R); break;
case 'S': doType(KeyEvent.VK_SHIFT, KeyEvent.VK_S); break;
case 'T': doType(KeyEvent.VK_SHIFT, KeyEvent.VK_T); break;
case 'U': doType(KeyEvent.VK_SHIFT, KeyEvent.VK_U); break;
case 'V': doType(KeyEvent.VK_SHIFT, KeyEvent.VK_V); break;
case 'W': doType(KeyEvent.VK_SHIFT, KeyEvent.VK_W); break;
case 'X': doType(KeyEvent.VK_SHIFT, KeyEvent.VK_X); break;
case 'Y': doType(KeyEvent.VK_SHIFT, KeyEvent.VK_Y); break;
case 'Z': doType(KeyEvent.VK_SHIFT, KeyEvent.VK_Z); break;
case '`': doType(KeyEvent.VK_BACK_QUOTE); break;
case '0': doType(KeyEvent.VK_0); break;
case '1': doType(KeyEvent.VK_1); break;
case '2': doType(KeyEvent.VK_2); break;
case '3': doType(KeyEvent.VK_3); break;
case '4': doType(KeyEvent.VK_4); break;
case '5': doType(KeyEvent.VK_5); break;
case '6': doType(KeyEvent.VK_6); break;
case '7': doType(KeyEvent.VK_7); break;
case '8': doType(KeyEvent.VK_8); break;
case '9': doType(KeyEvent.VK_9); break;
case '-': doType(KeyEvent.VK_MINUS); break;
case '=': doType(KeyEvent.VK_EQUALS); break;
case '~': doType(KeyEvent.VK_SHIFT, KeyEvent.VK_BACK_QUOTE); break;
case '!': doType(KeyEvent.VK_SHIFT, KeyEvent.VK_1); break;//doType(KeyEvent.VK_EXCLAMATION_MARK); break;
case '@': doType(KeyEvent.VK_AT); break;
case '#': doType(KeyEvent.VK_NUMBER_SIGN); break;
case '$': doType(KeyEvent.VK_DOLLAR); break;
case '%': doType(KeyEvent.VK_SHIFT, KeyEvent.VK_5); break;
case '^': doType(KeyEvent.VK_CIRCUMFLEX); break;
case '&': doType(KeyEvent.VK_AMPERSAND); break;
case '*': doType(KeyEvent.VK_ASTERISK); break;
case '(': doType(KeyEvent.VK_LEFT_PARENTHESIS); break;
case ')': doType(KeyEvent.VK_RIGHT_PARENTHESIS); break;
case '_': doType(KeyEvent.VK_SHIFT, KeyEvent.VK_MINUS); break;
case '+': doType(KeyEvent.VK_PLUS); break;
case 't': doType(KeyEvent.VK_TAB); break;
case 'n': doType(KeyEvent.VK_ENTER); break;
case '[': doType(KeyEvent.VK_OPEN_BRACKET); break;
case ']': doType(KeyEvent.VK_CLOSE_BRACKET); break;
case '\': doType(KeyEvent.VK_BACK_SLASH); break;
case '{': doType(KeyEvent.VK_SHIFT, KeyEvent. VK_OPEN_BRACKET); break;
case '}': doType(KeyEvent.VK_SHIFT, KeyEvent. VK_CLOSE_BRACKET); break;
case '|': doType(KeyEvent.VK_SHIFT, KeyEvent. VK_BACK_SLASH); break;
case ';': doType(KeyEvent.VK_SEMICOLON); break;
case ':': doType(KeyEvent.VK_SHIFT, KeyEvent.VK_SEMICOLON); break;
case ''': doType(KeyEvent.VK_QUOTE); break;
case '"': doType(KeyEvent.VK_QUOTEDBL); break;
case ',': doType(KeyEvent.VK_COMMA); break;
case '<': doType(KeyEvent.VK_SHIFT, KeyEvent.VK_COMMA); break;//doType(KeyEvent.VK_LESS); break;
case '.': doType(KeyEvent.VK_PERIOD); break;
case '>': doType(KeyEvent.VK_SHIFT,KeyEvent.VK_PERIOD); break;
case '/': doType(KeyEvent.VK_SLASH); break;
case '?': doType(KeyEvent.VK_SHIFT, KeyEvent.VK_SLASH); break;
case ' ': doType(KeyEvent.VK_SPACE); break;
//        default:  doType(KeyEvent.getExtendedKeyCodeForChar(character));
//                throw new IllegalArgumentException("Cannot type character " + character);
}
} catch (Exception e) {
System.out.println(e+" Can't type characer: "+character);
}
}
private void doType(int... keyCodes) 
{
doType(keyCodes, 0, keyCodes.length);
}
private void doType(int[] keyCodes, int offset, int length) 
{
if (length == 0) 
return;
robot.keyPress(keyCodes[offset]);
doType(keyCodes, offset + 1, length - 1);
robot.keyRelease(keyCodes[offset]);
}
}