public EncryptionVerifier(DocumentInputStream dis, int encryptedLength)
{
int saltSize = dis.ReadInt();
if (saltSize != 16)
{
throw new Exception("Salt size != 16 !?");
}
salt = new byte[16];
dis.ReadFully(salt);
verifier = new byte[16];
dis.ReadFully(verifier);
verifierHashSize = dis.ReadInt();
verifierHash = new byte[encryptedLength];
dis.ReadFully(verifierHash);
spinCount = 50000;
algorithm = EncryptionHeader.ALGORITHM_AES_128;
cipherMode = EncryptionHeader.MODE_ECB;
encryptedKey = null;
}
protected static EncryptionDocument ParseDescriptor(DocumentInputStream descriptor)
{
try
{
XmlDocument xmlDoc = new XmlDocument();
byte[] buf = new byte[descriptor.Length - descriptor.Position];
descriptor.ReadFully(buf);
string xml = Encoding.UTF8.GetString(buf);
OpenXml4Net.Util.XmlHelper.LoadXmlSafe(xmlDoc, xml, Encoding.UTF8);
return(EncryptionDocument.Parse(xmlDoc));
}
catch (Exception e)
{
throw new EncryptedDocumentException("Unable to parse encryption descriptor", e);
}
}
private byte[] NextChunk()
{
int index = (int)(_pos >> 12);
byte[] blockKey = new byte[4];
LittleEndian.PutInt(blockKey, 0, index);
byte[] iv = _ag.GenerateIv(_ag.Info.Header.Algorithm,
_ag.Info.Header.KeySalt, blockKey);
//_cipher.Mode = CipherMode.
_cipher.Key = _ag.SecretKey;
_cipher.IV = iv;
if (_lastIndex != index)
{
_stream.Skip((index - _lastIndex) << 12);
}
byte[] block = new byte[Math.Min(_stream.Available(), 4096)];
_stream.ReadFully(block);
_lastIndex = index + 1;
throw new NotImplementedException();
//return _cipher.doFinal(block); Leon
}
public EncryptionVerifier(DocumentInputStream dis, int encryptedLength)
{
int saltSize = dis.ReadInt();
if (saltSize != 16)
throw new Exception("Salt size != 16 !?");
salt = new byte[16];
dis.ReadFully(salt);
verifier = new byte[16];
dis.ReadFully(verifier);
verifierHashSize = dis.ReadInt();
verifierHash = new byte[encryptedLength];
dis.ReadFully(verifierHash);
spinCount = 50000;
algorithm = EncryptionHeader.ALGORITHM_AES_128;
cipherMode = EncryptionHeader.MODE_ECB;
encryptedKey = null;
}
