Asn1DerInputStream Class Reference

Inheritance diagram for Asn1DerInputStream:

Public Member Functions
	Asn1DerInputStream (System.IO.Stream istream)
virtual int	Available ()
virtual void	Close ()
override void	Mark ()
virtual bool	MarkSupported ()
override void	Reset ()
override long	Skip (long nbytes)
Public Member Functions inherited from Asn1DerDecodeBuffer
	Asn1DerDecodeBuffer (byte[] msgdata)
	Asn1DerDecodeBuffer (System.IO.Stream istream)
Public Member Functions inherited from Asn1BerDecodeBuffer
	Asn1BerDecodeBuffer (byte[] msgdata)
	Asn1BerDecodeBuffer (System.IO.Stream istream)
int	DecodeEnumValue (bool explicitTagging, int implicitLength)
int	DecodeEnumValue (Asn1Tag tag, bool explicitTagging, int implicitLength)
virtual int	DecodeLength ()
virtual byte []	DecodeOpenType ()
virtual byte []	DecodeOpenType (bool saveData)
virtual void	DecodeTag (Asn1Tag tag)
virtual int	DecodeTagAndLength (Asn1Tag tag)
virtual bool	MatchTag (short tagClass, short tagForm, int tagIDCode, Asn1Tag parsedTag, IntHolder parsedLen)
virtual bool	MatchTag (Asn1Tag tag, Asn1Tag parsedTag, IntHolder parsedLen)
virtual bool	MatchTag (Asn1Tag tag)
virtual void	Parse (Asn1TaggedEventHandler handler)
virtual void	PeekTag (Asn1Tag parsedTag)
virtual Asn1Tag	PeekTag ()
override int	ReadByte ()
Public Member Functions inherited from Asn1DecodeBuffer
virtual void	AddCaptureBuffer (System.IO.MemoryStream buffer)
virtual void	Capture (int nbytes)
virtual long	DecodeIntValue (int length, bool signExtend)
virtual int []	DecodeOIDContents (int llen)
virtual int []	DecodeRelOIDContents (int llen)
override System.IO.Stream	GetInputStream ()
virtual void	HexDump ()
virtual int	Read ()
virtual void	Read (byte[] buffer, int offset, int nbytes)
virtual void	Read (byte[] buffer)
int	Read2Bytes ()
int	Read4Bytes ()
virtual void	RemoveCaptureBuffer (System.IO.MemoryStream buffer)
virtual void	SetInputStream (byte[] msgdata, int offset, int length)
Public Member Functions inherited from Asn1MessageBuffer
virtual void	AddNamedEventHandler (Asn1NamedEventHandler handler)
virtual void	InvokeCharacters (System.String svalue)
virtual void	InvokeEndElement (System.String name, int index)
virtual void	InvokeStartElement (System.String name, int index)
Public Member Functions inherited from Asn1MessageBufferBase
void	SetKey (byte[] rtkey)
void	SetPermanentKey (byte[] rtkey)

Additional Inherited Members
Static Public Member Functions inherited from Asn1BerDecodeBuffer
static int	CalcIndefLen (byte[] data, int offset, int len)
Static Public Member Functions inherited from Asn1MessageBufferBase
static void	HexDump (System.IO.Stream ins, System.IO.StreamWriter outs)
static void	HexDump (System.IO.Stream ins)
Properties inherited from Asn1BerDecodeBuffer
virtual Asn1Tag	LastTag [get]
Properties inherited from Asn1DecodeBuffer
virtual int	ByteCount [get]
bool	LazyOpenTypeDecode [get, set]
Properties inherited from Asn1MessageBuffer
virtual Asn1MessageBuffer	EventHandlerList [set]
Properties inherited from Asn1MessageBufferBase
Asn1Context	Context [get]
virtual short	TypeCode [set]

Detailed Description

This class handles the input stream for the decoding of ASN.1 messages as specified in the Distinguished Encoding Rules (DER) as documented in the ITU-T X.690 standard.

Constructor & Destructor Documentation

Asn1DerInputStream()

Asn1DerInputStream

(

System.IO.Stream

istream

)

This constructor creates a DER decode buffer object that references an encoded ASN.1 message. In this case, the message is passed in using an System.IO.Stream object.

Parameters

istream

Input stream containing an encoded ASN.1 message.

Member Function Documentation

Available()

virtual int Available ( )

virtual

Returns the number of bytes that can be read (or skipped over) from this input stream without blocking by the next caller of a method for this input stream. The next caller might be the same thread or or another thread.

Throws, Exception thrown by C# System.IO.Stream for I/O error

Returns

the number of bytes that can be read from this input stream without blocking.

Implements Asn1InputStream.

Close()

virtual void Close ( )

virtual

Closes this input stream and releases any system resources associated with the stream.

Throws, Exception thrown by C# System.IO.Stream for I/O error

Implements Asn1InputStream.

Mark()

override void Mark

(

)

This method is used to mark the current position in the input stream for retry processing or reseting the input stream position to current position.

Implements Asn1InputStream.

MarkSupported()

virtual bool MarkSupported ( )

virtual

Tests if this input stream supports the seeking. This method is equivalent to C# CanSeek method of System.IO.Stream.

Returns

true if input stream supports seeking; Otherwise false.

Implements Asn1InputStream.

Reset()

override void Reset

(

)

This method is used to reset the current position in the input stream back to the location of the last 'mark' call. It is equivalent to calling 'Stream.Position' to marked location.

Implements Asn1InputStream.

Skip()

override long Skip

(

long

nbytes

)

This method will skip over the requested number of bytes in the input stream.

Parameters

nbytes

Number of bytes to skip

Returns

Skipped number of bytes

Implements Asn1InputStream.