//public bool SeekPacket(int PacketIdx)
//{
// Reset();
// while (ReadNextPacket() != null && PacketIdx != _PacketIndex) ;
// return (PacketIdx == _PacketIndex);
//}
//public byte[] ReadPacketBytes()
//{
// // Todo fix for partial packets
// long len = _NextIdx - _Idx;
// long OldPos = _fs.Position;
// byte[] Buffer = new byte[len];
// _fs.Seek(_Idx, SeekOrigin.Begin);
// _fs.Read(Buffer, 0, (int)len);
// _fs.Seek(OldPos, SeekOrigin.Begin);
// return Buffer;
//}
private PGPPacket CreatePGPPacket(byte PacketTag)
{
PGPPacket PGPPacket;
if (PacketTag == 1)
PGPPacket = new PKEncSessionKeyPacket();
else if (PacketTag == 2)
PGPPacket = new SignaturePacket();
else if (PacketTag == 3)
PGPPacket = new SymEncSessionKeyPacket();
else if (PacketTag == 4)
PGPPacket = new OnePassSignaturePacket();
else if (PacketTag == 5)
PGPPacket = new SecretKeyPacket();
else if (PacketTag == 6)
PGPPacket = new PublicKeyPacket();
else if (PacketTag == 7)
PGPPacket = new SecretKeyPacket();
else if (PacketTag == 8)
PGPPacket = new CompressedDataPacket();
else if (PacketTag == 9)
PGPPacket = new SymEncDataPacket();
else if (PacketTag == 10)
PGPPacket = new MarkerPacket();
else if (PacketTag == 11)
PGPPacket = new LiteralDataPacket();
else if (PacketTag == 12)
PGPPacket = new TrustPacket();
else if (PacketTag == 13)
PGPPacket = new UserIDPacket();
else if (PacketTag == 14)
PGPPacket = new PublicKeyPacket();
else if (PacketTag == 17)
PGPPacket = new UserAttributePacket();
else if (PacketTag == 18)
PGPPacket = new SymEncIPDataPacket();
else if (PacketTag == 19)
PGPPacket = new MDCPacket();
else
PGPPacket = new UnknownPacket();
Length = BytesRemaining;
_PacketOffset = (int)( _fs.Position - _Idx);
PGPPacket.Length = this.Length;
PGPPacket.PacketTag = PacketTag;
PGPPacket.PacketIndex = _PacketIndex;
PGPPacket.FileName = this.FileName;
return PGPPacket;
}
public void GenerateCertifyHash(PublicKeyPacket PKP, UserIDPacket UIDP)
{
SignaturePacket SigP = this;
int HashContextLength = 3 + PKP.PacketDataPublicKey.Length +
5 + UIDP.UserIDBytes.Length +
6 + SigP.HashedSubPacketBytes.Length
+ 6;
int idx = 3 + PKP.PacketDataPublicKey.Length;
byte[] HashContext = new byte[HashContextLength];
HashContext[0] = 0x99;
HashContext[1] = (byte)((PKP.PacketDataPublicKey.Length & 0xFF00) >> 8);
HashContext[2] = (byte)(PKP.PacketDataPublicKey.Length & 0x00FF);
Array.Copy(PKP.PacketDataPublicKey, 0, HashContext, 3, PKP.PacketDataPublicKey.Length);
HashContext[idx++] = 0xB4;
HashContext[idx++] = (byte)((UIDP.UserIDBytes.Length & 0xFF000000) >> 24);
HashContext[idx++] = (byte)((UIDP.UserIDBytes.Length & 0x00FF0000) >> 16);
HashContext[idx++] = (byte)((UIDP.UserIDBytes.Length & 0x0000FF00) >> 8);
HashContext[idx++] = (byte)(UIDP.UserIDBytes.Length & 0x000000FF);
Array.Copy(UIDP.UserIDBytes, 0, HashContext, idx, UIDP.UserIDBytes.Length);
idx += UIDP.UserIDBytes.Length;
HashContext[idx++] = SigP.Version;
HashContext[idx++] = SigP.SignatureType;
HashContext[idx++] = SigP.PKAlgo;
HashContext[idx++] = SigP.HashAlgorithm; // Version 4
HashContext[idx++] = (byte)((SigP.HashedSubPacketBytes.Length & 0xFF00) >> 8);
HashContext[idx++] = (byte)(SigP.HashedSubPacketBytes.Length & 0x00FF);
Array.Copy(SigP.HashedSubPacketBytes, 0, HashContext, idx, SigP.HashedSubPacketBytes.Length);
var HashedSubPacketLength = SigP.HashedSubPacketBytes.Length;
idx += HashedSubPacketLength;
HashContext[idx++] = 0x04;
HashContext[idx++] = 0xFF;
HashedSubPacketLength += 6; // Add the bytes before the hashed data
HashContext[idx++] = (byte)((HashedSubPacketLength & 0xFF000000) >> 24);
HashContext[idx++] = (byte)((HashedSubPacketLength & 0x00FF0000) >> 16);
HashContext[idx++] = (byte)((HashedSubPacketLength & 0x0000FF00) >> 8);
HashContext[idx++] = (byte)(HashedSubPacketLength & 0x000000FF);
HashedData = ComputeHash(HashContext);
}
public static ByteBlock Process(string PGPFile)
{
var Root = new ByteBlock();
PGPPacket pgp;
PublicKeyPacket PrimaryKeyPacket = null;
PublicKeyPacket SubKeyPacket = null;
UserIDPacket UIDPacket = null;
Stack <OnePassSignaturePacket> OPSigPacketStack = new Stack <OnePassSignaturePacket>();
HashAlgorithm[] HashAlgorithms = null;
using (var PacketReader = new PGPReader(PGPFile))
{
PacketReader.DoIndexUpdate += IndexUpdate;
while ((pgp = PacketReader.ReadNextPacket()) != null)
{
TreeBuilder Tree = new TreeBuilder(PacketReader);
pgp.Parse(Tree);
if (pgp is LiteralDataPacket litPgp)
{
if (HashAlgorithms == null)
{
HashAlgorithms = GetHashAlgorithms(OPSigPacketStack);
}
litPgp.ProgressUpdate += StatusUpdate;
litPgp.DoHash(PacketReader, HashAlgorithms);
}
else
{
if (pgp is OnePassSignaturePacket OPSig)
{
OPSigPacketStack.Push(OPSig);
}
else if (pgp.PacketTag == 6 || pgp.PacketTag == 5)
{
PrimaryKeyPacket = (PublicKeyPacket)pgp;
}
else if (pgp is UserIDPacket)
{
UIDPacket = (UserIDPacket)pgp;
}
else if (pgp.PacketTag == 14 || pgp.PacketTag == 7)
{
SubKeyPacket = (PublicKeyPacket)pgp;
}
else if (pgp is SignaturePacket Sig)
{
if ((Sig.SignatureType == 0x18 || Sig.SignatureType == 0x19) && PrimaryKeyPacket != null && SubKeyPacket != null && SubKeyPacket.PacketDataPublicKey != null)
{
Sig.GenerateSubKeyBindingHash(PrimaryKeyPacket, SubKeyPacket);
}
if (Sig.SignatureType >= 0x10 && Sig.SignatureType <= 0x13 && PrimaryKeyPacket != null && UIDPacket != null)
{
Sig.GenerateCertifyHash(PrimaryKeyPacket, UIDPacket);
}
// Signature of a Binary Document
if (Sig.SignatureType == 0x00)
{
// Are we generating hash for One Pass Signature Packet
if (OPSigPacketStack.Count() > 0)
{
var OnePassSignaturePacket = OPSigPacketStack.Pop();
if (OnePassSignaturePacket.HashAlgorithm == Sig.HashAlgorithm)
{
Sig.GenerateBinaryHash(HashAlgorithmTypes.GetHashAlgoManaged(Sig.HashAlgorithm, HashAlgorithms));
}
}
}
}
}
PacketBlock pb = new PacketBlock(pgp);
pb.AddChildBlock(Tree.StartBlock);
Root.AddChildBlock(pb);
_PacketNodes.Add(pb);
}
}
return(Root.ChildBlock);
}
