Word DocX上的DecriptionInfo

Question

我拉我的頭髮，因爲我無法得到樣品的工作 - 希望有人可以幫助.. 我想檢測如果一個DOCX和DOC文件是密碼保護/加密。我已經在幾個地方看到了這個帖子，但我無法得到它的工作 - 它沒有拋出異常。有人可以看到我做錯了什麼。注意我只需要檢測密碼..我不想打開文檔。

 String fileLocation = "C:/myfile.docx"; 
     File file = new File(fileLocation); 
     FileInputStream fis = new FileInputStream(file.getAbsolutePath()); 
     POIFSFileSystem pfis = new POIFSFileSystem(fis); 

     try{ 
      EncryptionInfo info = new EncryptionInfo(pfis); 
      EncryptionMode mode = info.getEncryptionMode(); 
      Decryptor d = Decryptor.getInstance(info); 

      //Try and open it 
      if(!d.verifyPassword(Decryptor.DEFAULT_PASSWORD)) 
      { 
       //file is encrypted 
      }    
     } 
     catch(GeneralSecurityException gse) 
     { 
      //file is encrypted 
     } 
     catch(EncryptedDocumentException edc) 
     { 
      //file is encrypted 
     } 

Answer 1

我還沒有詳細闡述太多讓代碼更小，但我只是採取了工廠類之一 - 像SlideShowFactory - 和修改它的H/XWPF。由於H/XWPF在文檔級別上沒有通用接口（截至目前），所以快速的方法是返回一個Object。

import java.io.File; 
import java.io.FileNotFoundException; 
import java.io.IOException; 
import java.io.InputStream; 
import java.io.PushbackInputStream; 

import org.apache.poi.EncryptedDocumentException; 
import org.apache.poi.hssf.record.crypto.Biff8EncryptionKey; 
import org.apache.poi.hwpf.HWPFDocument; 
import org.apache.poi.openxml4j.exceptions.InvalidFormatException; 
import org.apache.poi.openxml4j.opc.OPCPackage; 
import org.apache.poi.openxml4j.opc.PackageAccess; 
import org.apache.poi.poifs.crypt.Decryptor; 
import org.apache.poi.poifs.filesystem.DirectoryNode; 
import org.apache.poi.poifs.filesystem.DocumentFactoryHelper; 
import org.apache.poi.poifs.filesystem.NPOIFSFileSystem; 
import org.apache.poi.poifs.filesystem.OfficeXmlFileException; 
import org.apache.poi.util.IOUtils; 
import org.apache.poi.xwpf.usermodel.XWPFDocument; 

public class EncDetect { 
    public static void main(String[] args) { 
     String dir = "/home/kiwiwings/project/poi/poi/test-data"; 
     String[] files = { 
      "document/bug53475-password-is-solrcell.docx", 
      "document/password_tika_binaryrc4.doc", 
      "document/58067.docx", 
      "document/58804.doc" 
     }; 

     for (String f : files) { 
      try { 
       DocumentFactory.create(new File(dir, f)); 
       System.out.println(f + " not encrypted"); 
      } catch (EncryptedDocumentException e) { 
       System.out.println(f + " is encrypted"); 
      } catch (Exception e) { 
       System.out.println(f + " " +e.getMessage()); 
      } 
     } 

    } 

    static class DocumentFactory { 
     public static Object create(NPOIFSFileSystem fs) throws IOException { 
      return create(fs, null); 
     } 

     public static Object create(final NPOIFSFileSystem fs, String password) throws IOException { 
      DirectoryNode root = fs.getRoot(); 

      // Encrypted OOXML files go inside OLE2 containers, is this one? 
      if (root.hasEntry(Decryptor.DEFAULT_POIFS_ENTRY)) { 
       InputStream stream = null; 
       try { 
        stream = DocumentFactoryHelper.getDecryptedStream(fs, password); 

        return createXWPFDocument(stream); 
       } finally { 
        IOUtils.closeQuietly(stream); 
       } 
      } 

      // If we get here, it isn't an encrypted XWPF file 
      // So, treat it as a regular HWPF one 
      boolean passwordSet = false; 
      if (password != null) { 
       Biff8EncryptionKey.setCurrentUserPassword(password); 
       passwordSet = true; 
      } 
      try { 
       return createHWPFDocument(fs); 
      } finally { 
       if (passwordSet) { 
        Biff8EncryptionKey.setCurrentUserPassword(null); 
       } 
      } 
     } 

     public static Object create(InputStream inp) throws IOException, EncryptedDocumentException { 
      return create(inp, null); 
     } 

     public static Object create(InputStream inp, String password) throws IOException, EncryptedDocumentException { 
      // If clearly doesn't do mark/reset, wrap up 
      if (! inp.markSupported()) { 
       inp = new PushbackInputStream(inp, 8); 
      } 

      // Ensure that there is at least some data there 
      byte[] header8 = IOUtils.peekFirst8Bytes(inp); 

      // Try to create 
      if (NPOIFSFileSystem.hasPOIFSHeader(header8)) { 
       NPOIFSFileSystem fs = new NPOIFSFileSystem(inp); 
       return create(fs, password); 
      } 
      if (DocumentFactoryHelper.hasOOXMLHeader(inp)) { 
       return createXWPFDocument(inp); 
      } 
      throw new IllegalArgumentException("Your InputStream was neither an OLE2 stream, nor an OOXML stream"); 
     } 

     public static Object create(File file) throws IOException, EncryptedDocumentException { 
      return create(file, null); 
     } 

     public static Object create(File file, String password) throws IOException, EncryptedDocumentException { 
      return create(file, password, false); 
     } 

     public static Object create(File file, String password, boolean readOnly) throws IOException, EncryptedDocumentException { 
      if (!file.exists()) { 
       throw new FileNotFoundException(file.toString()); 
      } 

      NPOIFSFileSystem fs = null; 
      try { 
       fs = new NPOIFSFileSystem(file, readOnly); 
       return create(fs, password); 
      } catch(OfficeXmlFileException e) { 
       IOUtils.closeQuietly(fs); 
       return createXWPFDocument(file, readOnly); 
      } catch(RuntimeException e) { 
       IOUtils.closeQuietly(fs); 
       throw e; 
      } 
     } 

     protected static Object createHWPFDocument(NPOIFSFileSystem fs) throws IOException, EncryptedDocumentException { 
      return new HWPFDocument(fs.getRoot()); 
     } 

     protected static Object createXWPFDocument(InputStream stream) throws IOException, EncryptedDocumentException { 
      return new XWPFDocument(stream); 
     } 

     protected static Object createXWPFDocument(File file, boolean readOnly) throws IOException, EncryptedDocumentException { 
      try { 
       OPCPackage pkg = OPCPackage.open(file, readOnly ? PackageAccess.READ : PackageAccess.READ_WRITE); 
       return new XWPFDocument(pkg); 
      } catch (InvalidFormatException e) { 
       throw new IOException(e); 
      } 
     } 
    } 

}