internal static void WriteHeaderField(BinaryWriter bwOut,
Kdb4HeaderFieldID kdbID, byte[] pbData)
{
Debug.Assert(bwOut != null);
if (bwOut == null)
{
throw new ArgumentNullException("bwOut");
}
bwOut.Write((byte)kdbID);
if (pbData != null)
{
ushort uLength = (ushort)pbData.Length;
bwOut.Write(uLength);
if (uLength > 0)
{
bwOut.Write(pbData);
}
}
else
{
bwOut.Write((ushort)0);
}
}
public void WriteHeaderField(BinaryWriter writer, Kdb4HeaderFieldID headerId, byte[] data)
{
var x = new BinaryWriter(new MemoryStream());
writer.Write((byte)headerId);
writer.Write((ushort)data.Length);
Write(writer, data);
}
private bool ReadHeaderField(BinaryReaderEx brSource)
{
Debug.Assert(brSource != null);
if (brSource == null)
{
throw new ArgumentNullException("brSource");
}
byte btFieldID = brSource.ReadByte();
ushort uSize = MemUtil.BytesToUInt16(brSource.ReadBytes(2));
byte[] pbData = null;
if (uSize > 0)
{
string strPrevExcpText = brSource.ReadExceptionText;
brSource.ReadExceptionText = KLRes.FileHeaderEndEarly;
pbData = brSource.ReadBytes(uSize);
brSource.ReadExceptionText = strPrevExcpText;
}
bool bResult = true;
Kdb4HeaderFieldID kdbID = (Kdb4HeaderFieldID)btFieldID;
switch (kdbID)
{
case Kdb4HeaderFieldID.EndOfHeader:
bResult = false; // Returning false indicates end of header
break;
case Kdb4HeaderFieldID.CipherID:
SetCipher(pbData);
break;
case Kdb4HeaderFieldID.CompressionFlags:
SetCompressionFlags(pbData);
break;
case Kdb4HeaderFieldID.MasterSeed:
m_pbMasterSeed = pbData;
CryptoRandom.Instance.AddEntropy(pbData);
break;
case Kdb4HeaderFieldID.TransformSeed:
m_pbTransformSeed = pbData;
CryptoRandom.Instance.AddEntropy(pbData);
break;
case Kdb4HeaderFieldID.TransformRounds:
m_pwDatabase.KeyEncryptionRounds = MemUtil.BytesToUInt64(pbData);
break;
case Kdb4HeaderFieldID.EncryptionIV:
m_pbEncryptionIV = pbData;
break;
case Kdb4HeaderFieldID.ProtectedStreamKey:
m_pbProtectedStreamKey = pbData;
CryptoRandom.Instance.AddEntropy(pbData);
break;
case Kdb4HeaderFieldID.StreamStartBytes:
m_pbStreamStartBytes = pbData;
break;
case Kdb4HeaderFieldID.InnerRandomStreamID:
SetInnerRandomStreamID(pbData);
break;
default:
Debug.Assert(false);
if (m_slLogger != null)
{
m_slLogger.SetText(KLRes.UnknownHeaderId + @": " +
kdbID.ToString() + "!", LogStatusType.Warning);
}
break;
}
return(bResult);
}
private static void WriteHeaderField(BinaryWriter bwOut,
Kdb4HeaderFieldID kdbID, byte[] pbData)
{
Debug.Assert(bwOut != null);
if(bwOut == null) throw new ArgumentNullException("bwOut");
bwOut.Write((byte)kdbID);
if(pbData != null)
{
ushort uLength = (ushort)pbData.Length;
bwOut.Write(uLength);
if(uLength > 0) bwOut.Write(pbData);
}
else bwOut.Write((ushort)0);
}
void ReadDbHeader(Stream encryptedDatabase)
{
BinaryReader source = new BinaryReader(encryptedDatabase);
{
byte[] pbSig1 = source.ReadBytes(4);
uint uSig1 = BytesToUInt32(pbSig1);
byte[] pbSig2 = source.ReadBytes(4);
uint uSig2 = BytesToUInt32(pbSig2);
if ((uSig1 == FileSignatureOld1) && (uSig2 == FileSignatureOld2))
{
throw new Exception("Old format");
}
if ((uSig1 == FileSignature1) && (uSig2 == FileSignature2))
{
}
else if ((uSig1 == FileSignaturePreRelease1) && (uSig2 == FileSignaturePreRelease2))
{
}
else
{
throw new Exception("Unknown format: File signature invalid");
}
byte[] pb = source.ReadBytes(4);
uint uVersion = BytesToUInt32(pb);
if ((uVersion & FileVersionCriticalMask) > (FileVersion32 & FileVersionCriticalMask))
{
throw new Exception("Unknown format: File version unsupported");
}
bool endReached = false;
while (!endReached)
{
byte btFieldID = source.ReadByte();
ushort uSize = BytesToUInt16(source.ReadBytes(2));
byte[] pbData = null;
if (uSize > 0)
{
pbData = source.ReadBytes(uSize);
}
Kdb4HeaderFieldID kdbID = (Kdb4HeaderFieldID)btFieldID;
switch (kdbID)
{
case Kdb4HeaderFieldID.EndOfHeader:
endReached = true; // end of header
break;
case Kdb4HeaderFieldID.MasterSeed:
_masterSeed = pbData;
break;
case Kdb4HeaderFieldID.TransformSeed:
_transformSeed = pbData;
break;
case Kdb4HeaderFieldID.TransformRounds:
_transformRounds = BytesToUInt64(pbData);
break;
case Kdb4HeaderFieldID.EncryptionIV:
_initializationVectors = pbData;
break;
case Kdb4HeaderFieldID.StreamStartBytes:
_expectedStartBytes = pbData;
break;
}
}
}
if (_transformRounds == 0)
{
throw new Exception();
}
if (_initializationVectors == null)
{
throw new Exception();
}
if (_expectedStartBytes == null)
{
throw new Exception();
}
}