//this is only here for testing purposes, this needs to be moved
public bool BlankPassword(PSTFile pst)
{
var toMatch = new byte[] { 0xFF, 0x67 };
foreach (var entry in this.DataEntries)
{
if (entry.Key[0] == toMatch[0] && entry.Key[1] == toMatch[1])
{
pst.CloseMMF();
//DatatEncoder.CryptPermute(ref this._data.Parent.Data, this._data.Parent.Data.Length, true);
using (var stream = new FileStream(pst.Path, FileMode.Open))
{
var dataBlockOffset = entry.DataOffset;
//this._data.Parent.Data[dataBlockOffset] = 0x00;
//this._data.Parent.Data[dataBlockOffset + 1] = 0x00;
this._data.Parent.Data[dataBlockOffset + 2] = 0x00;
this._data.Parent.Data[dataBlockOffset + 3] = 0x00;
this._data.Parent.Data[dataBlockOffset + 4] = 0x00;
this._data.Parent.Data[dataBlockOffset + 5] = 0x00;
DatatEncoder.CryptPermute(this._data.Parent.Data, this._data.Parent.Data.Length, true, pst);
var testCRC = (new CRC32()).ComputeCRC(0, this._data.Parent.Data, (uint)this._data.Parent.Data.Length);
stream.Seek((long)(this._data.Parent.PstOffset + entry.DataOffset), SeekOrigin.Begin);
stream.Write(
new []
{
//this._data.Parent.Data[dataBlockOffset],
//this._data.Parent.Data[dataBlockOffset + 1],
this._data.Parent.Data[dataBlockOffset + 2],
this._data.Parent.Data[dataBlockOffset + 3],
this._data.Parent.Data[dataBlockOffset + 4],
this._data.Parent.Data[dataBlockOffset + 5]
}, 0, 4);
var newCRC = (new CRC32()).ComputeCRC(0, this._data.Parent.Data, (uint)this._data.Parent.Data.Length);
DatatEncoder.CryptPermute(this._data.Parent.Data, this._data.Parent.Data.Length, false, pst);
var crcoffset = (int)(this._data.Parent.PstOffset + this._data.Parent.CRCOffset);
stream.Seek(crcoffset, SeekOrigin.Begin);
var temp = BitConverter.GetBytes(newCRC);
stream.Write(new []
{
temp[0], temp[1], temp[2], temp[3]
}, 0, 4);
}
pst.OpenMMF();
return(true);
}
}
return(false);
}
public bool RemovePassword()
{
var messageStore = new PropertyContext(SpecialNIDs.NID_MESSAGE_STORE, this);
var rootDataNode = messageStore.BTH.Root.Data;
const int unknown2Bytes = 2;
var passwordKey = new byte[] { 0xFF, 0x67 };
foreach (var entry in rootDataNode.DataEntries)
{
if (entry.Key.SequenceEqual(passwordKey))
{
var dataBlockOffset = (int)entry.DataOffset + (int)rootDataNode.Data.BlockOffset + unknown2Bytes;
var slice = rootDataNode.Data.Parent.Data.Skip(dataBlockOffset).Take(4).ToList();
var isProtected = !slice.SequenceEqual(new byte[] { 0, 0, 0, 0 });
if (!isProtected)
{
return(false);
}
CloseMMF();
using (var stream = new FileStream(Path, FileMode.Open))
{
rootDataNode.Data.Parent.Data[dataBlockOffset] = 0x00;
rootDataNode.Data.Parent.Data[dataBlockOffset + 1] = 0x00;
rootDataNode.Data.Parent.Data[dataBlockOffset + 2] = 0x00;
rootDataNode.Data.Parent.Data[dataBlockOffset + 3] = 0x00;
DatatEncoder.CryptPermute(rootDataNode.Data.Parent.Data, rootDataNode.Data.Parent.Data.Length, true, Header.EncodingAlgotihm);
// seems to always be [65, 65, 65, 65]
var permutationBytes = rootDataNode.Data.Parent.Data.Skip(dataBlockOffset).Take(4).ToArray();
stream.Seek((long)rootDataNode.Data.Parent.PstOffset + dataBlockOffset, SeekOrigin.Begin);
stream.Write(permutationBytes, 0, 4);
var newCRC = new CRC32().ComputeCRC(0, rootDataNode.Data.Parent.Data, (uint)rootDataNode.Data.Parent.Data.Length);
DatatEncoder.CryptPermute(rootDataNode.Data.Parent.Data, rootDataNode.Data.Parent.Data.Length, false, Header.EncodingAlgotihm);
var crcoffset = (long)(rootDataNode.Data.Parent.PstOffset + rootDataNode.Data.Parent.CRCOffset);
stream.Seek(crcoffset, SeekOrigin.Begin);
var crcBuffer = BitConverter.GetBytes(newCRC);
stream.Write(crcBuffer, 0, 4);
}
OpenMMF();
return(true);
}
}
return(false);
}
