public static byte[] decrypt(InputStream fromInputStream, String password) throws IOException {
CipherSession cipherSession = new CipherSession(password);
MultiCipherInputStream cipherInputStream =
new MultiCipherInputStream(fromInputStream, cipherSession);
ByteArrayOutputStream plaintextOutputStream = new ByteArrayOutputStream();
FileUtil.appendToOutputStream(cipherInputStream, plaintextOutputStream);
cipherInputStream.close();
plaintextOutputStream.close();
return plaintextOutputStream.toByteArray();
}
public static void encrypt(
InputStream plaintextInputStream,
OutputStream ciphertextOutputStream,
List<CipherSpec> cipherSuites,
String password)
throws IOException {
CipherSession cipherSession = new CipherSession(password);
OutputStream multiCipherOutputStream =
new MultiCipherOutputStream(ciphertextOutputStream, cipherSuites, cipherSession);
FileUtil.appendToOutputStream(plaintextInputStream, multiCipherOutputStream);
multiCipherOutputStream.close();
ciphertextOutputStream.close();
}
private void downloadAndDecryptMultiChunks(Set<MultiChunkEntry> unknownMultiChunks)
throws StorageException, IOException {
logger.log(Level.INFO, "- Downloading and extracting multichunks ...");
TransferManager transferManager = config.getConnection().createTransferManager();
// TODO [medium] Check existing files by checksum and do NOT download them if they exist
// locally, or copy them
for (MultiChunkEntry multiChunkEntry : unknownMultiChunks) {
File localEncryptedMultiChunkFile =
config.getCache().getEncryptedMultiChunkFile(multiChunkEntry.getId());
File localDecryptedMultiChunkFile =
config.getCache().getDecryptedMultiChunkFile(multiChunkEntry.getId());
MultiChunkRemoteFile remoteMultiChunkFile =
new MultiChunkRemoteFile(
localEncryptedMultiChunkFile
.getName()); // TODO [low] Make MultiChunkRemoteFile class, or something like that
logger.log(
Level.INFO,
" + Downloading multichunk " + StringUtil.toHex(multiChunkEntry.getId()) + " ...");
transferManager.download(remoteMultiChunkFile, localEncryptedMultiChunkFile);
result.downloadedMultiChunks.add(multiChunkEntry);
logger.log(
Level.INFO,
" + Decrypting multichunk " + StringUtil.toHex(multiChunkEntry.getId()) + " ...");
InputStream multiChunkInputStream =
config
.getTransformer()
.createInputStream(new FileInputStream(localEncryptedMultiChunkFile));
OutputStream decryptedMultiChunkOutputStream =
new FileOutputStream(localDecryptedMultiChunkFile);
// TODO [medium] Calculate checksum while writing file, to verify correct content
FileUtil.appendToOutputStream(multiChunkInputStream, decryptedMultiChunkOutputStream);
decryptedMultiChunkOutputStream.close();
multiChunkInputStream.close();
logger.log(
Level.FINE,
" + Locally deleting multichunk " + StringUtil.toHex(multiChunkEntry.getId()) + " ...");
localEncryptedMultiChunkFile.delete();
}
transferManager.disconnect();
}
public static void appendToOutputStream(File fileToAppend, OutputStream outputStream)
throws IOException {
appendToOutputStream(new FileInputStream(fileToAppend), outputStream);
}
