public static bool TryReadFrom(Stream inputStream, out OpenPgpPacketHeader readPacketHeader)
{
int firstByteRaw = inputStream.ReadByte();
if (firstByteRaw < 0)
{
readPacketHeader = null;
return(false);
}
var firstByte = (byte)firstByteRaw;
if ((firstByte & NewHeaderHighBits) == NewHeaderHighBits)
{
readPacketHeader = new OpenPgpPacketHeader(firstByte, inputStream);
return(true);
}
if ((firstByte & OpenPgpOldFormatPacketHeader.OldHeaderHighBits) == OpenPgpOldFormatPacketHeader.OldHeaderHighBits)
{
readPacketHeader = new OpenPgpOldFormatPacketHeader(firstByte, inputStream);
return(true);
}
readPacketHeader = null;
return(false);
}
public static IEnumerable <OpenPgpPacket> ReadAllPackets(Stream inputStream)
{
OpenPgpPacketHeader header;
while (OpenPgpPacketHeader.TryReadFrom(inputStream, out header))
{
long currentPosition = inputStream.Position;
long afterPacket = currentPosition + header.Length;
Type mappedType;
if (_TagIdToType.TryGetValue(header.TagId, out mappedType))
{
yield return(Activator.CreateInstance(mappedType, header, inputStream) as OpenPgpPacket);
}
else
{
yield return(new OpenPgpPacket(header, inputStream));
}
if (header.Length >= 0)
{
inputStream.Seek(afterPacket, SeekOrigin.Begin);
}
}
}
public ModificationDetectionCodeOpenPgpPacket(OpenPgpPacketHeader header, Stream inputStream) : base(header, inputStream)
{
var sha1Value = new byte[20];
if (inputStream.Read(sha1Value, 0, 20) != 20)
{
throw new CryptographicException();
}
HashValue = sha1Value;
}
public LiteralDataOpenPgpPacket(OpenPgpPacketHeader header, Stream inputStream) : base(header, inputStream)
{
var format = (char)inputStream.ReadByte();
var stringLength = inputStream.ReadByte();
var stringBytes = inputStream.CopySubsetToBytes(stringLength);
FileName = Encoding.UTF8.GetString(stringBytes);
FileDate = OpenPgpTimeField.Read(inputStream).Date;
LiteralStream = new MemoryStream();
inputStream.CopySubsetTo(LiteralStream, StartOfNextPacketOffset - inputStream.Position);
LiteralStream.Position = 0;
}
public CompressedDataOpenPgpPacket(OpenPgpPacketHeader header, Stream inputStream) : base(header, inputStream)
{
int compressionAlgorithmId = inputStream.ReadByte();
CompressionAlgorithm = OpenPgpCompressionAlgorithm.GetCompressionAlgorithmById(compressionAlgorithmId);
var decompressionStream = CompressionAlgorithm.Decompress(inputStream) as DeflateStream;
DecompressedStream = new MemoryStream();
decompressionStream.CopyTo(DecompressedStream);
DecompressedStream.Position = 0;
}
public SymmetricallyEncryptedIntegrityProtectedDataOpenPgpPacket(OpenPgpPacketHeader header, Stream inputStream) : base(header, inputStream)
{
var foundByte = inputStream.ReadByte();
if (foundByte != ExpectedVersion)
{
throw new InvalidDataException();
}
int encryptedDataLength = (int)header.Length - 1; // minus version byte
var ms = new MemoryStream(encryptedDataLength);
inputStream.CopySubsetTo(ms, encryptedDataLength);
ms.Position = 0;
EncryptedStream = ms;
}
public SymmetricKeyEncryptedSessionKeyOpenPgpPacket(OpenPgpPacketHeader header, Stream inputStream) : base(header, inputStream)
{
int versionNumber = inputStream.ReadByte();
if (versionNumber != ExpectedVersion)
{
throw new InvalidDataException();
}
Cipher = OpenPgpSymmetricCipher.GetCipher(inputStream.ReadByte());
StringToKeySpecifier = OpenPgpStringToKeySpecifier.ReadFrom(inputStream);
if (inputStream.Position < StartOfNextPacketOffset)
{
throw new NotImplementedException();
}
}
public CompressedDataOpenPgpPacket(OpenPgpPacketHeader header, Stream inputStream)
: base(header, inputStream)
{
int compressionAlgorithmId = inputStream.ReadByte();
CompressionAlgorithm = OpenPgpCompressionAlgorithm.GetCompressionAlgorithmById(compressionAlgorithmId);
var decompressionStream = CompressionAlgorithm.Decompress(inputStream) as DeflateStream;
DecompressedStream = new MemoryStream();
decompressionStream.CopyTo(DecompressedStream);
DecompressedStream.Position = 0;
}
public SymmetricKeyEncryptedSessionKeyOpenPgpPacket(OpenPgpPacketHeader header, Stream inputStream)
: base(header, inputStream)
{
int versionNumber = inputStream.ReadByte();
if(versionNumber != ExpectedVersion) {
throw new InvalidDataException();
}
Cipher = OpenPgpSymmetricCipher.GetCipher(inputStream.ReadByte());
StringToKeySpecifier = OpenPgpStringToKeySpecifier.ReadFrom(inputStream);
if(inputStream.Position < StartOfNextPacketOffset) {
throw new NotImplementedException();
}
}
public LiteralDataOpenPgpPacket(OpenPgpPacketHeader header, Stream inputStream)
: base(header, inputStream)
{
var format = (char) inputStream.ReadByte();
var stringLength = inputStream.ReadByte();
var stringBytes = inputStream.CopySubsetToBytes(stringLength);
FileName = Encoding.UTF8.GetString(stringBytes);
FileDate = OpenPgpTimeField.Read(inputStream).Date;
LiteralStream = new MemoryStream();
inputStream.CopySubsetTo(LiteralStream, StartOfNextPacketOffset - inputStream.Position);
LiteralStream.Position = 0;
}
protected OpenPgpPacket(int tagId)
{
TagId = tagId;
Header = new OpenPgpPacketHeader(tagId);
}
internal OpenPgpPacket(OpenPgpPacketHeader header, Stream inputStream) : this(header.TagId)
{
_InputStream = inputStream;
_StartOffset = inputStream.Position;
Header = header;
}
public SymmetricallyEncryptedIntegrityProtectedDataOpenPgpPacket(OpenPgpPacketHeader header, Stream inputStream)
: base(header, inputStream)
{
var foundByte = inputStream.ReadByte();
if(foundByte != ExpectedVersion) {
throw new InvalidDataException();
}
int encryptedDataLength = (int) header.Length - 1; // minus version byte
var ms = new MemoryStream(encryptedDataLength);
inputStream.CopySubsetTo(ms, encryptedDataLength);
ms.Position = 0;
EncryptedStream = ms;
}
public static bool TryReadFrom(Stream inputStream, out OpenPgpPacketHeader readPacketHeader)
{
int firstByteRaw = inputStream.ReadByte();
if(firstByteRaw < 0) {
readPacketHeader = null;
return false;
}
var firstByte = (byte) firstByteRaw;
if((firstByte & NewHeaderHighBits) == NewHeaderHighBits) {
readPacketHeader = new OpenPgpPacketHeader(firstByte, inputStream);
return true;
}
if((firstByte & OpenPgpOldFormatPacketHeader.OldHeaderHighBits) == OpenPgpOldFormatPacketHeader.OldHeaderHighBits) {
readPacketHeader = new OpenPgpOldFormatPacketHeader(firstByte, inputStream);
return true;
}
readPacketHeader = null;
return false;
}
protected OpenPgpPacket(int tagId)
{
TagId = tagId;
Header = new OpenPgpPacketHeader(tagId);
}
internal OpenPgpPacket(OpenPgpPacketHeader header, Stream inputStream)
: this(header.TagId)
{
_InputStream = inputStream;
_StartOffset = inputStream.Position;
Header = header;
}
public ModificationDetectionCodeOpenPgpPacket(OpenPgpPacketHeader header, Stream inputStream)
: base(header, inputStream)
{
var sha1Value = new byte[20];
if(inputStream.Read(sha1Value, 0, 20) != 20) {
throw new CryptographicException();
}
HashValue = sha1Value;
}
