public ProtectedBinary GenerateKey32(byte[] pbKeySeed32, ulong uNumRounds)
{
Debug.Assert(pbKeySeed32 != null);
if(pbKeySeed32 == null) throw new ArgumentNullException("pbKeySeed32");
Debug.Assert(pbKeySeed32.Length == 32);
if(pbKeySeed32.Length != 32) throw new ArgumentException("pbKeySeed32");
AesKdf kdf = new AesKdf();
KdfParameters p = kdf.GetDefaultParameters();
p.SetUInt64(AesKdf.ParamRounds, uNumRounds);
p.SetByteArray(AesKdf.ParamSeed, pbKeySeed32);
return GenerateKey32(p);
}
public override bool Export(PwExportInfo pwExportInfo, Stream sOutput,
IStatusLogger slLogger)
{
PwDatabase pd = pwExportInfo.ContextDatabase;
PwGroup pgRoot = pwExportInfo.DataGroup;
// Remove everything that requires KDBX 4 or higher;
// see also KdbxFile.GetMinKdbxVersion
KdfParameters pKdf = pd.KdfParameters;
AesKdf kdfAes = new AesKdf();
if(!kdfAes.Uuid.Equals(pKdf.KdfUuid))
pd.KdfParameters = kdfAes.GetDefaultParameters();
VariantDictionary vdPublic = pd.PublicCustomData;
pd.PublicCustomData = new VariantDictionary();
List<PwGroup> lCustomGK = new List<PwGroup>();
List<StringDictionaryEx> lCustomGV = new List<StringDictionaryEx>();
List<PwEntry> lCustomEK = new List<PwEntry>();
List<StringDictionaryEx> lCustomEV = new List<StringDictionaryEx>();
GroupHandler gh = delegate(PwGroup pg)
{
if(pg == null) { Debug.Assert(false); return true; }
if(pg.CustomData.Count > 0)
{
lCustomGK.Add(pg);
lCustomGV.Add(pg.CustomData);
pg.CustomData = new StringDictionaryEx();
}
return true;
};
EntryHandler eh = delegate(PwEntry pe)
{
if(pe == null) { Debug.Assert(false); return true; }
if(pe.CustomData.Count > 0)
{
lCustomEK.Add(pe);
lCustomEV.Add(pe.CustomData);
pe.CustomData = new StringDictionaryEx();
}
return true;
};
gh(pgRoot);
pgRoot.TraverseTree(TraversalMethod.PreOrder, gh, eh);
try
{
KdbxFile kdbx = new KdbxFile(pd);
kdbx.ForceVersion = KdbxFile.FileVersion32_3;
kdbx.Save(sOutput, pgRoot, KdbxFormat.Default, slLogger);
}
finally
{
// Restore
pd.KdfParameters = pKdf;
pd.PublicCustomData = vdPublic;
for(int i = 0; i < lCustomGK.Count; ++i)
lCustomGK[i].CustomData = lCustomGV[i];
for(int i = 0; i < lCustomEK.Count; ++i)
lCustomEK[i].CustomData = lCustomEV[i];
}
return true;
}
private bool ReadHeaderField(BinaryReaderEx brSource)
{
Debug.Assert(brSource != null);
if(brSource == null) throw new ArgumentNullException("brSource");
byte btFieldID = brSource.ReadByte();
int cbSize;
Debug.Assert(m_uFileVersion > 0);
if(m_uFileVersion < FileVersion32_4)
cbSize = (int)MemUtil.BytesToUInt16(brSource.ReadBytes(2));
else cbSize = MemUtil.BytesToInt32(brSource.ReadBytes(4));
if(cbSize < 0) throw new FormatException(KLRes.FileCorrupted);
byte[] pbData = MemUtil.EmptyByteArray;
if(cbSize > 0) pbData = brSource.ReadBytes(cbSize);
bool bResult = true;
KdbxHeaderFieldID kdbID = (KdbxHeaderFieldID)btFieldID;
switch(kdbID)
{
case KdbxHeaderFieldID.EndOfHeader:
bResult = false; // Returning false indicates end of header
break;
case KdbxHeaderFieldID.CipherID:
SetCipher(pbData);
break;
case KdbxHeaderFieldID.CompressionFlags:
SetCompressionFlags(pbData);
break;
case KdbxHeaderFieldID.MasterSeed:
m_pbMasterSeed = pbData;
CryptoRandom.Instance.AddEntropy(pbData);
break;
// Obsolete; for backward compatibility only
case KdbxHeaderFieldID.TransformSeed:
Debug.Assert(m_uFileVersion < FileVersion32_4);
AesKdf kdfS = new AesKdf();
if(!m_pwDatabase.KdfParameters.KdfUuid.Equals(kdfS.Uuid))
m_pwDatabase.KdfParameters = kdfS.GetDefaultParameters();
// m_pbTransformSeed = pbData;
m_pwDatabase.KdfParameters.SetByteArray(AesKdf.ParamSeed, pbData);
CryptoRandom.Instance.AddEntropy(pbData);
break;
// Obsolete; for backward compatibility only
case KdbxHeaderFieldID.TransformRounds:
Debug.Assert(m_uFileVersion < FileVersion32_4);
AesKdf kdfR = new AesKdf();
if(!m_pwDatabase.KdfParameters.KdfUuid.Equals(kdfR.Uuid))
m_pwDatabase.KdfParameters = kdfR.GetDefaultParameters();
// m_pwDatabase.KeyEncryptionRounds = MemUtil.BytesToUInt64(pbData);
m_pwDatabase.KdfParameters.SetUInt64(AesKdf.ParamRounds,
MemUtil.BytesToUInt64(pbData));
break;
case KdbxHeaderFieldID.EncryptionIV:
m_pbEncryptionIV = pbData;
break;
case KdbxHeaderFieldID.InnerRandomStreamKey:
Debug.Assert(m_uFileVersion < FileVersion32_4);
Debug.Assert(m_pbInnerRandomStreamKey == null);
m_pbInnerRandomStreamKey = pbData;
CryptoRandom.Instance.AddEntropy(pbData);
break;
case KdbxHeaderFieldID.StreamStartBytes:
Debug.Assert(m_uFileVersion < FileVersion32_4);
m_pbStreamStartBytes = pbData;
break;
case KdbxHeaderFieldID.InnerRandomStreamID:
Debug.Assert(m_uFileVersion < FileVersion32_4);
SetInnerRandomStreamID(pbData);
break;
case KdbxHeaderFieldID.KdfParameters:
m_pwDatabase.KdfParameters = KdfParameters.DeserializeExt(pbData);
break;
case KdbxHeaderFieldID.PublicCustomData:
Debug.Assert(m_pwDatabase.PublicCustomData.Count == 0);
m_pwDatabase.PublicCustomData = VariantDictionary.Deserialize(pbData);
break;
default:
Debug.Assert(false);
if(m_slLogger != null)
m_slLogger.SetText(KLRes.UnknownHeaderId + @": " +
kdbID.ToString() + "!", LogStatusType.Warning);
break;
}
return bResult;
}
