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101 changes: 101 additions & 0 deletions
101
src/main/java/org/owasp/wrongsecrets/challenges/docker/BinaryExecutionHelper.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,101 @@ | ||
| package org.owasp.wrongsecrets.challenges.docker; | ||
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| import com.google.common.base.Strings; | ||
| import lombok.extern.slf4j.Slf4j; | ||
| import org.apache.commons.io.FileUtils; | ||
| import org.springframework.util.ResourceUtils; | ||
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| import java.io.*; | ||
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| @Slf4j | ||
| public class BinaryExecutionHelper { | ||
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| public static String ERROR_EXECUTION = "Error with executing"; | ||
| private final int challengeNumber; | ||
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| public BinaryExecutionHelper(int challengeNumber) { | ||
| this.challengeNumber = challengeNumber; | ||
| } | ||
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| private boolean useX86() { | ||
| String systemARch = System.getProperty("os.arch"); | ||
| log.info("System arch detected: {}", systemARch); | ||
| return systemARch.contains("amd64") || systemARch.contains("x86"); | ||
| } | ||
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| private boolean useLinux() { | ||
| String systemARch = System.getProperty("os.arch"); | ||
| log.info("System arch detected: {}", systemARch); | ||
| return systemARch.contains("amd64"); | ||
| } | ||
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| private File retrieveFile(String location) { | ||
| try { | ||
| log.info("First looking at location:'classpath:executables/{}'", location); | ||
| return ResourceUtils.getFile("classpath:executables/" + location); | ||
| } catch (FileNotFoundException e) { | ||
| log.debug("exception finding file", e); | ||
| log.info("You might be running this in a docker container, trying alternative path: '/home/wrongsecrets/{}'", location); | ||
| return new File("/home/wrongsecrets/" + location); | ||
| } | ||
| } | ||
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| private File createTempExecutable(String fileName) throws IOException { | ||
| File challengeFile; | ||
| if (useX86()) { | ||
| challengeFile = retrieveFile(fileName); | ||
| if (useLinux()) { | ||
| challengeFile = retrieveFile(fileName + "-linux"); | ||
| } | ||
| } else { | ||
| challengeFile = retrieveFile(fileName + "-c-arm"); | ||
| } | ||
| //prepare file to execute | ||
| File execFile = File.createTempFile("c-exec-" + fileName, "sh"); | ||
| if (!execFile.setExecutable(true)) { | ||
| log.info("setting the file {} executable failed... rest can be ignored", execFile.getPath()); | ||
| } | ||
| OutputStream os = new FileOutputStream(execFile.getPath()); | ||
| ByteArrayInputStream is = new ByteArrayInputStream(FileUtils.readFileToByteArray(challengeFile)); | ||
| byte[] b = new byte[2048]; | ||
| int length; | ||
| while ((length = is.read(b)) != -1) { | ||
| os.write(b, 0, length); | ||
| } | ||
| is.close(); | ||
| os.close(); | ||
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| return execFile; | ||
| } | ||
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| private String executeCommand(File execFile, String argument) throws IOException, InterruptedException { | ||
| ProcessBuilder ps = new ProcessBuilder(execFile.getPath(), argument); | ||
| ps.redirectErrorStream(true); | ||
| Process pr = ps.start(); | ||
| BufferedReader in = new BufferedReader(new InputStreamReader(pr.getInputStream())); | ||
| String result = in.readLine(); | ||
| pr.waitFor(); | ||
| return result; | ||
| } | ||
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| public String executeCommand(String guess, String fileName) { | ||
| if (Strings.isNullOrEmpty((guess))) { | ||
| guess = "spoil"; | ||
| } | ||
| try { | ||
| File execFile = createTempExecutable(fileName); | ||
| String result = executeCommand(execFile, guess); | ||
| if (!execFile.delete()) { | ||
| log.info("Deleting the file {} failed...", execFile.getPath()); | ||
| } | ||
| log.info("stdout challenge {}: {}", challengeNumber, result); | ||
| return result; | ||
| } catch (IOException | NullPointerException | InterruptedException e) { | ||
| log.warn("Error executing:", e); | ||
| return ERROR_EXECUTION; | ||
| } | ||
|
|
||
| } | ||
| } |
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