private void WriteInnerHeaderField(Stream s, KdbxInnerHeaderFieldID kdbID,
byte[] pbData1, byte[] pbData2)
{
s.WriteByte((byte)kdbID);
byte[] pb1 = (pbData1 ?? MemUtil.EmptyByteArray);
byte[] pb2 = (pbData2 ?? MemUtil.EmptyByteArray);
int cb = pb1.Length + pb2.Length;
if (cb < 0)
{
Debug.Assert(false); throw new OutOfMemoryException();
}
MemUtil.Write(s, MemUtil.Int32ToBytes(cb));
MemUtil.Write(s, pb1);
MemUtil.Write(s, pb2);
}
private bool ReadInnerHeaderField(BinaryReaderEx br)
{
Debug.Assert(br != null);
if (br == null)
{
throw new ArgumentNullException("br");
}
byte btFieldID = br.ReadByte();
int cbSize = MemUtil.BytesToInt32(br.ReadBytes(4));
if (cbSize < 0)
{
throw new FormatException(KLRes.FileCorrupted);
}
byte[] pbData = MemUtil.EmptyByteArray;
if (cbSize > 0)
{
pbData = br.ReadBytes(cbSize);
}
bool bResult = true;
KdbxInnerHeaderFieldID kdbID = (KdbxInnerHeaderFieldID)btFieldID;
switch (kdbID)
{
case KdbxInnerHeaderFieldID.EndOfHeader:
bResult = false; // Returning false indicates end of header
break;
case KdbxInnerHeaderFieldID.InnerRandomStreamID:
SetInnerRandomStreamID(pbData);
break;
case KdbxInnerHeaderFieldID.InnerRandomStreamKey:
Debug.Assert(m_pbInnerRandomStreamKey == null);
m_pbInnerRandomStreamKey = pbData;
CryptoRandom.Instance.AddEntropy(pbData);
break;
case KdbxInnerHeaderFieldID.Binary:
if (pbData.Length < 1)
{
throw new FormatException();
}
KdbxBinaryFlags f = (KdbxBinaryFlags)pbData[0];
bool bProt = ((f & KdbxBinaryFlags.Protected) != KdbxBinaryFlags.None);
ProtectedBinary pb = new ProtectedBinary(bProt, pbData,
1, pbData.Length - 1);
Debug.Assert(m_pbsBinaries.Find(pb) < 0); // No deduplication?
m_pbsBinaries.Add(pb);
if (bProt)
{
MemUtil.ZeroByteArray(pbData);
}
break;
default:
Debug.Assert(false);
break;
}
return(bResult);
}
private void WriteInnerHeaderField(Stream s, KdbxInnerHeaderFieldID kdbID,
byte[] pbData1, byte[] pbData2)
{
s.WriteByte((byte)kdbID);
byte[] pb1 = (pbData1 ?? MemUtil.EmptyByteArray);
byte[] pb2 = (pbData2 ?? MemUtil.EmptyByteArray);
int cb = pb1.Length + pb2.Length;
if(cb < 0) { Debug.Assert(false); throw new OutOfMemoryException(); }
MemUtil.Write(s, MemUtil.Int32ToBytes(cb));
MemUtil.Write(s, pb1);
MemUtil.Write(s, pb2);
}
