Examples of org.syncany.chunk.Transformer

org.syncany.chunk.Transformer
A transformer combines one or many stream-transforming {@link OutputStream}s and {@link InputStream}s. Implementations might provide functionality to encrypt or compress output streams, and to decrypt or uncompress a corresponding input stream.
Transformers can be chained in order to allow multiple consecutive output-/input stream transformers to be applied to a stream.
A transformer can be instantiated using its implementation-specific constructor, or by calling its default constructor and initializing it using the {@link #init(Map) init()} method. Dependingon the implementation, varying settings must be passed. @author Philipp C. Heckel

      + "    </databaseVersion>\n"
      + "  </databaseVersions>\n"
      + "</database>";
    
    
    Transformer cipherTransformer = new CipherTransformer(cipherSuites, masterKey);
    
    // Test encrypt
    byte[] encryptedData = doEncrypt(StringUtil.toBytesUTF8(xmlStr), cipherTransformer);


    // Test decrypt with SAX parser  
    InputStream is = cipherTransformer.createInputStream(new ByteArrayInputStream(encryptedData));
    
    SAXParserFactory factory = SAXParserFactory.newInstance();
    SAXParser saxParser = factory.newSAXParser();
    
    saxParser.parse(is, new DefaultHandler());

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    // See http://bouncy-castle.1462172.n4.nabble.com/Using-AES-GCM-NoPadding-with-javax-crypto-CipherInputStream-td4655271.html
    // and http://bouncy-castle.1462172.n4.nabble.com/using-GCMBlockCipher-with-CipherInputStream-td4655147.html
  }  
  
  private void doTestEncryption(List<CipherSpec> cipherSpecs) throws InvalidKeySpecException, NoSuchAlgorithmException, IOException, CipherException, InvalidKeyException {
    Transformer encryptCipherTransformer = new CipherTransformer(cipherSpecs, masterKey);
    Transformer decryptCipherTransformer = new CipherTransformer(cipherSpecs, masterKey);
    
    // Prepare data
    byte[] srcData = new byte[10*1024];
    
    for (int i=0;i<srcData.length; i++) {

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    if (repoTO.getTransformers() == null || repoTO.getTransformers().size() == 0) {
      transformer = new NoTransformer();
    }
    else {
      ArrayList<TransformerTO> transformerTOs = new ArrayList<TransformerTO>(repoTO.getTransformers());
      Transformer lastTransformer = null;


      for (int i = transformerTOs.size() - 1; i >= 0; i--) {
        TransformerTO transformerTO = transformerTOs.get(i);
        Transformer transformer = Transformer.getInstance(transformerTO.getType());


        if (transformer == null) {
          throw new ConfigException("Cannot find transformer '" + transformerTO.getType() + "'");
        }


        if (transformer instanceof CipherTransformer) { // Dirty workaround
          transformerTO.getSettings().put(CipherTransformer.PROPERTY_MASTER_KEY, StringUtil.toHex(getMasterKey().getEncoded()));
          transformerTO.getSettings().put(CipherTransformer.PROPERTY_MASTER_KEY_SALT, StringUtil.toHex(getMasterKey().getSalt()));
        }


        transformer.init(transformerTO.getSettings());


        if (lastTransformer != null) {
          transformer.setNextTransformer(lastTransformer);
        }


        lastTransformer = transformer;
      }

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        File transactionFile = createTempFile("transaction");


        // Download transaction file
        download(transaction, transactionFile);


        Transformer transformer = config == null ? null : config.getTransformer();
        TransactionTO transactionTO = TransactionTO.load(transformer, transactionFile);


        // Extract final locations
        transactions.put(transactionTO, transaction);
        transactionFile.delete();

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Related Classes of org.syncany.chunk.Transformer

org.syncany.config.Config

org.syncany.plugins.transfer.TransactionAwareTransferManager

org.syncany.tests.crypto.MultiCipherStreamsTest

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