Inheritance diagram for Asn1DecodeBitBuffer:

Public Member Functions
	Asn1DecodeBitBuffer (byte[] msgdata)

	Asn1DecodeBitBuffer (System.IO.Stream istream)

virtual void	ByteAlign ()

virtual bool	DecodeBit ()

virtual int	DecodeBitsToInt (int nbits)

virtual long	DecodeBitsToLong (int nbits)

virtual void	DecodeBitsToOctetArray (byte[] data, int offset, int nbits)

virtual void	DecodeBitsToOctetArray (byte[] data, int offset, int bitOffset, int nbits)

void	MoveBitCursor (long offset)

sealed override int	ReadByte ()

sealed override void	SetInputStream (byte[] msgdata, int offset, int length)

void	SkipBits (long bits)

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)

int []	DecodeOIDContents (int llen)

BigInteger []	DecodeOIDContentsBig (int llen)

int []	DecodeRelOIDContents (int llen)

BigInteger []	DecodeRelOIDContentsBig (int llen)

override System.IO.Stream	GetInputStream ()

virtual void	HexDump ()

virtual void	Mark ()

virtual void	MarkPos (ref BufferPos bufferPos)

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	Reset ()

virtual void	ResetPos (ref BufferPos bufferPos)

virtual long	Skip (long nbytes)

void	SkipOIDContents (int llen)

int []	SkipRelOIDContents (int llen)

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)

Properties
virtual long	BitOffset `[get]`

virtual int	MsgBitCnt `[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]`

Additional Inherited Members
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)

Detailed Description

This class handles decoding where the decode buffer is viewed as a set of bits (i.e. a bit offset is maintained).

Constructor & Destructor Documentation

◆ Asn1DecodeBitBuffer() [1/2]

Asn1DecodeBitBuffer ( byte [] msgdata )

This constructor creates a Decode buffer object that references an encoded ASN.1 message.

Parameters

msgdata Byte array containing an encoded ASN.1 message.

◆ Asn1DecodeBitBuffer() [2/2]

Asn1DecodeBitBuffer ( System.IO.Stream istream )

This constructor creates a 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

◆ ByteAlign()

virtual void ByteAlign ( )

virtual

This methods byte-aligns the buffer.

Reimplemented in Asn1PerDecodeBuffer.

◆ DecodeBit()

virtual bool DecodeBit ( )

virtual

This method decodes a single bit value.

Returns: Boolean value of bit that was decoded.

Reimplemented in Asn1PerDecodeBuffer.

Referenced by Asn1TimeUtil.ConvertToDER().

◆ DecodeBitsToInt()

virtual int DecodeBitsToInt ( int nbits )

virtual

This method decodes bits from the input stream into a standard integer value. Up to 32 bits can be decoded. The bits are placed in the least-significant bytes of the integer.

Parameters

nbits Number of bits to Decode

Returns: Integer value containing decoded bits

Reimplemented in Asn1PerDecodeBuffer.

Referenced by Asn1BigInteger.DecodeUnsigned(), and Asn1Boolean.Encode().

◆ DecodeBitsToLong()

virtual long DecodeBitsToLong ( int nbits )

virtual

This method decodes bits from the input stream into a long integer value. Up to 64 bits can be decoded. The bits are placed in the least-significant bytes of the long integer.

Returns: Long integer value containing decoded bits

Parameters

nbits Number of bits to Decode

Reimplemented in Asn1PerDecodeBuffer.

References Diag.Prtln(), Asn1Util.ToHexString(), and Asn1Util.URShift().

◆ DecodeBitsToOctetArray() [1/2]

virtual void DecodeBitsToOctetArray	(	byte []	data,
		int	offset,
		int	nbits
	)

virtual

This method decodes bits from the input stream into an array of octets. The user is expected to have provided an array large enough to hold the number of bits requested to be decoded.

Parameters

data	Octet array for decoded data
offset	Starting byte offset into array
nbits	Number of bits to Decode

Reimplemented in Asn1PerDecodeBuffer.

Referenced by Asn1Real.DecodeDouble(), Asn1BigInteger.DecodeSigned(), Asn1Real.DecodeSingle(), and Asn1BigInteger.DecodeUnsigned().

◆ DecodeBitsToOctetArray() [2/2]

virtual void DecodeBitsToOctetArray	(	byte []	data,
		int	offset,
		int	bitOffset,
		int	nbits
	)

virtual

This method decodes bits from the input stream into an array of octets. The user is expected to have provided an array large enough to hold the number of bits requested to be decoded.

The first bit is decoded into the given offset byte at the MSB if bitOffset == 0, and at the LSB if bitOffset == 7.

Parameters

data	Octet array for decoded data
offset	Starting byte offset into array
bitOffset	Where in first byte the first bit goes
nbits	Number of bits to Decode

References Diag.Prtln(), and Asn1Util.ToHexString().

◆ MoveBitCursor()

void MoveBitCursor ( long offset )

This method moves the bit cursor to the given offset.

Parameters

offset Absolute bit offset value

◆ ReadByte()

sealed override int ReadByte ( )

virtual

This method returns the next available 8-bit value from the input stream. It is implemented differently for BER/DER and PER to take into account odd alignments in PER.

Returns: Next 8-bit byte value from input stream

Implements Asn1DecodeBuffer.

Referenced by Asn1Real10.Encode(), and Asn1CharString.validate().

◆ SetInputStream()

sealed override void SetInputStream	(	byte []	msgdata,
		int	offset,
		int	length
	)

virtual

This method will set the input stream from which data is read. This version of the method allows a byte array containing encoded data to be specified.

Parameters

msgdata	Byte array containing encoded message data
offset	Starting offset of data in the byte array
length	Length (in bytes) of the encoded data

Reimplemented from Asn1DecodeBuffer.

Referenced by Asn1PerDecodeBuffer.SetBuffer().

◆ SkipBits()

void SkipBits ( long bits )

Skip the given number of bits. This many bits must be present or else this will throw Asn1EndOfBufferException.

Parameters

bits	The number of bits

Referenced by Asn1Integer.DecodeValue(), Asn1Real10.Skip(), Asn1OctetString.Skip(), Asn1BitString.Skip(), and Asn1Real.Skip().

Property Documentation

◆ BitOffset

virtual long BitOffset

get

Gets the absolute offset to the current bit in the Decode buffer.

Value: offset to current bit in Decode buffer

◆ MsgBitCnt

virtual int MsgBitCnt

get

Gets the number of bits in the encoded message.

Value: count of bits in encoded message

Public Member Functions

Properties

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ Asn1DecodeBitBuffer() [1/2]

◆ Asn1DecodeBitBuffer() [2/2]

Member Function Documentation

◆ ByteAlign()

◆ DecodeBit()

◆ DecodeBitsToInt()

◆ DecodeBitsToLong()

◆ DecodeBitsToOctetArray() [1/2]

◆ DecodeBitsToOctetArray() [2/2]

◆ MoveBitCursor()

◆ ReadByte()

◆ SetInputStream()

◆ SkipBits()

Property Documentation

◆ BitOffset

◆ MsgBitCnt