public override Stream GetDataStream(DirectoryNode dir)
{
DocumentInputStream dis = dir.CreateDocumentInputStream("EncryptedPackage");
_length = dis.ReadLong();
return(new ChunkedCipherInputStream(dis, _length, this));
}
public override Stream GetDataStream(DirectoryNode dir)
{
DocumentInputStream dr = dir.CreateDocumentInputStream("EncryptedPackage");
long size = dr.ReadLong();
return(new ChunkedCipherInputStream(dr, size, this));
}
public EncryptionHeader(DocumentInputStream dr)
{
flags = dr.ReadInt();
sizeExtra = dr.ReadInt();
algorithm = dr.ReadInt();
hashAlgorithm = dr.ReadInt();
keySize = dr.ReadInt();
providerType = dr.ReadInt();
dr.ReadLong(); //skip reserved.
StringBuilder builder = new StringBuilder();
while (true)
{
char c = (char)dr.ReadShort();
if (c == 0)
{
break;
}
builder.Append(c);
}
cspName = builder.ToString();
cipherMode = MODE_ECB;
keySalt = null;
}
public EncryptionHeader(DocumentInputStream dr)
{
flags = dr.ReadInt();
sizeExtra = dr.ReadInt();
algorithm = dr.ReadInt();
hashAlgorithm = dr.ReadInt();
keySize = dr.ReadInt();
providerType = dr.ReadInt();
dr.ReadLong(); //skip reserved.
StringBuilder builder = new StringBuilder();
while (true)
{
char c = (char)dr.ReadShort();
if (c == 0)
break;
builder.Append(c);
}
cspName = builder.ToString();
cipherMode = MODE_ECB;
keySalt = null;
}
public override Stream GetDataStream(DirectoryNode dir)
{
DocumentInputStream dr = dir.CreateDocumentInputStream("EncryptedPackage");
long size = dr.ReadLong();
SymmetricAlgorithm cipher = GetCipher();
return(new CryptoStream(dr, cipher.CreateDecryptor(cipher.Key, cipher.IV), CryptoStreamMode.Read));
}
public override InputStream GetDataStream(DirectoryNode dir)
{
DocumentInputStream dis = dir.CreateDocumentInputStream(DEFAULT_POIFS_ENTRY);
_length = dis.ReadLong();
BinaryRC4CipherInputStream cipherStream = new BinaryRC4CipherInputStream(dis, _length, this);
//return cipherStream.GetStream();
throw new NotImplementedException("BinaryRC4CipherInputStream should be derived from InputStream");
}
public override InputStream GetDataStream(DirectoryNode dir)
{
DocumentInputStream dis = dir.CreateDocumentInputStream(DEFAULT_POIFS_ENTRY);
_length = dis.ReadLong();
var stream = new AgileCipherInputStream(dis, _length, builder, this);
stream.Position = 0;
return(stream);
}
public override InputStream GetDataStream(DirectoryNode dir)
{
DocumentInputStream dis = dir.CreateDocumentInputStream(Encryptor.DEFAULT_POIFS_ENTRY);
_length = dis.ReadLong();
// limit wrong calculated ole entries - (bug #57080)
// standard encryption always uses aes encoding, so blockSize is always 16
// http://stackoverflow.com/questions/3283787/size-of-data-after-aes-encryption
int blockSize = builder.GetHeader().CipherAlgorithm.blockSize;
long cipherLen = (_length / blockSize + 1) * blockSize;
Cipher cipher = GetCipher(GetSecretKey());
ByteArrayInputStream boundedDis = new BoundedInputStream(dis, cipherLen);
return(new BoundedInputStream(new CipherInputStream(boundedDis, cipher), _length));
}
