Crypto++  8.2
Free C++ class library of cryptographic schemes
Public Types | Public Member Functions | List of all members
BERGeneralDecoder Class Reference

BER General Decoder. More...

+ Inheritance diagram for BERGeneralDecoder:

Public Types

enum  { DefaultTag = SEQUENCE | CONSTRUCTED }
 Default ASN.1 tag.
 

Public Member Functions

 BERGeneralDecoder (BufferedTransformation &inQueue)
 Construct an ASN.1 decoder. More...
 
 BERGeneralDecoder (BufferedTransformation &inQueue, byte asnTag)
 Construct an ASN.1 decoder. More...
 
 BERGeneralDecoder (BERGeneralDecoder &inQueue, byte asnTag)
 Construct an ASN.1 decoder. More...
 
bool IsDefiniteLength () const
 Determine length encoding. More...
 
lword RemainingLength () const
 Determine remaining length. More...
 
bool EndReached () const
 Determine end of stream. More...
 
byte PeekByte () const
 Determine next octet. More...
 
void CheckByte (byte b)
 Determine next octet. More...
 
size_t TransferTo2 (BufferedTransformation &target, lword &transferBytes, const std::string &channel=DEFAULT_CHANNEL, bool blocking=true)
 Transfer bytes to another BufferedTransformation. More...
 
size_t CopyRangeTo2 (BufferedTransformation &target, lword &begin, lword end=LWORD_MAX, const std::string &channel=DEFAULT_CHANNEL, bool blocking=true) const
 Copy bytes to another BufferedTransformation. More...
 
void MessageEnd ()
 Signals the end of messages to the object. More...
 
- Public Member Functions inherited from Store
 Store ()
 Construct a Store.
 
void IsolatedInitialize (const NameValuePairs &parameters)
 Initialize or reinitialize this object, without signal propagation. More...
 
unsigned int NumberOfMessages () const
 Provides the number of meesages processed by this object. More...
 
bool GetNextMessage ()
 Start retrieving the next message. More...
 
unsigned int CopyMessagesTo (BufferedTransformation &target, unsigned int count=UINT_MAX, const std::string &channel=DEFAULT_CHANNEL) const
 
- Public Member Functions inherited from AutoSignaling< InputRejecting< BufferedTransformation > >
 AutoSignaling (int propagation=-1)
 Construct an AutoSignaling. More...
 
void SetAutoSignalPropagation (int propagation)
 
int GetAutoSignalPropagation () const
 
- Public Member Functions inherited from InputRejecting< BufferedTransformation >
size_t Put2 (const byte *inString, size_t length, int messageEnd, bool blocking)
 Input a byte array for processing. More...
 
bool IsolatedFlush (bool hardFlush, bool blocking)
 
bool IsolatedMessageSeriesEnd (bool blocking)
 
size_t ChannelPut2 (const std::string &channel, const byte *inString, size_t length, int messageEnd, bool blocking)
 
bool ChannelMessageSeriesEnd (const std::string &channel, int messageEnd, bool blocking)
 
- Public Member Functions inherited from BufferedTransformation
 BufferedTransformation ()
 Construct a BufferedTransformation.
 
BufferedTransformationRef ()
 Provides a reference to this object. More...
 
size_t Put (byte inByte, bool blocking=true)
 Input a byte for processing. More...
 
size_t Put (const byte *inString, size_t length, bool blocking=true)
 Input a byte buffer for processing. More...
 
size_t PutWord16 (word16 value, ByteOrder order=BIG_ENDIAN_ORDER, bool blocking=true)
 Input a 16-bit word for processing. More...
 
size_t PutWord32 (word32 value, ByteOrder order=BIG_ENDIAN_ORDER, bool blocking=true)
 Input a 32-bit word for processing. More...
 
size_t PutWord64 (word64 value, ByteOrder order=BIG_ENDIAN_ORDER, bool blocking=true)
 Input a 64-bit word for processing. More...
 
virtual byte * CreatePutSpace (size_t &size)
 Request space which can be written into by the caller. More...
 
virtual bool CanModifyInput () const
 Determines whether input can be modified by the callee. More...
 
size_t PutModifiable (byte *inString, size_t length, bool blocking=true)
 Input multiple bytes that may be modified by callee. More...
 
bool MessageEnd (int propagation=-1, bool blocking=true)
 Signals the end of messages to the object. More...
 
size_t PutMessageEnd (const byte *inString, size_t length, int propagation=-1, bool blocking=true)
 Input multiple bytes for processing and signal the end of a message. More...
 
virtual size_t PutModifiable2 (byte *inString, size_t length, int messageEnd, bool blocking)
 Input multiple bytes that may be modified by callee. More...
 
unsigned int GetMaxWaitObjectCount () const
 Retrieves the maximum number of waitable objects.
 
void GetWaitObjects (WaitObjectContainer &container, CallStack const &callStack)
 Retrieves waitable objects. More...
 
virtual void Initialize (const NameValuePairs &parameters=g_nullNameValuePairs, int propagation=-1)
 Initialize or reinitialize this object, with signal propagation. More...
 
virtual bool Flush (bool hardFlush, int propagation=-1, bool blocking=true)
 Flush buffered input and/or output, with signal propagation. More...
 
virtual bool MessageSeriesEnd (int propagation=-1, bool blocking=true)
 Marks the end of a series of messages, with signal propagation. More...
 
virtual lword MaxRetrievable () const
 Provides the number of bytes ready for retrieval. More...
 
virtual bool AnyRetrievable () const
 Determines whether bytes are ready for retrieval. More...
 
virtual size_t Get (byte &outByte)
 Retrieve a 8-bit byte. More...
 
virtual size_t Get (byte *outString, size_t getMax)
 Retrieve a block of bytes. More...
 
virtual size_t Peek (byte &outByte) const
 Peek a 8-bit byte. More...
 
virtual size_t Peek (byte *outString, size_t peekMax) const
 Peek a block of bytes. More...
 
size_t GetWord16 (word16 &value, ByteOrder order=BIG_ENDIAN_ORDER)
 Retrieve a 16-bit word. More...
 
size_t GetWord32 (word32 &value, ByteOrder order=BIG_ENDIAN_ORDER)
 Retrieve a 32-bit word. More...
 
size_t GetWord64 (word64 &value, ByteOrder order=BIG_ENDIAN_ORDER)
 Retrieve a 64-bit word. More...
 
size_t PeekWord16 (word16 &value, ByteOrder order=BIG_ENDIAN_ORDER) const
 Peek a 16-bit word. More...
 
size_t PeekWord32 (word32 &value, ByteOrder order=BIG_ENDIAN_ORDER) const
 Peek a 32-bit word. More...
 
size_t PeekWord64 (word64 &value, ByteOrder order=BIG_ENDIAN_ORDER) const
 Peek a 64-bit word. More...
 
lword TransferTo (BufferedTransformation &target, lword transferMax=LWORD_MAX, const std::string &channel=DEFAULT_CHANNEL)
 move transferMax bytes of the buffered output to target as input More...
 
virtual lword Skip (lword skipMax=LWORD_MAX)
 Discard skipMax bytes from the output buffer. More...
 
lword CopyTo (BufferedTransformation &target, lword copyMax=LWORD_MAX, const std::string &channel=DEFAULT_CHANNEL) const
 copy copyMax bytes of the buffered output to target as input More...
 
lword CopyRangeTo (BufferedTransformation &target, lword position, lword copyMax=LWORD_MAX, const std::string &channel=DEFAULT_CHANNEL) const
 Copy bytes from this object using an index to another BufferedTransformation. More...
 
virtual lword TotalBytesRetrievable () const
 Provides the number of bytes ready for retrieval. More...
 
virtual bool AnyMessages () const
 Determines if any messages are available for retrieval. More...
 
virtual unsigned int SkipMessages (unsigned int count=UINT_MAX)
 Skip a number of meessages. More...
 
unsigned int TransferMessagesTo (BufferedTransformation &target, unsigned int count=UINT_MAX, const std::string &channel=DEFAULT_CHANNEL)
 Transfer messages from this object to another BufferedTransformation. More...
 
unsigned int CopyMessagesTo (BufferedTransformation &target, unsigned int count=UINT_MAX, const std::string &channel=DEFAULT_CHANNEL) const
 Copy messages from this object to another BufferedTransformation. More...
 
virtual void SkipAll ()
 Skip all messages in the series.
 
void TransferAllTo (BufferedTransformation &target, const std::string &channel=DEFAULT_CHANNEL)
 Transfer all bytes from this object to another BufferedTransformation. More...
 
void CopyAllTo (BufferedTransformation &target, const std::string &channel=DEFAULT_CHANNEL) const
 Copy messages from this object to another BufferedTransformation. More...
 
virtual bool GetNextMessageSeries ()
 Retrieve the next message in a series. More...
 
virtual unsigned int NumberOfMessagesInThisSeries () const
 Provides the number of messages in a series. More...
 
virtual unsigned int NumberOfMessageSeries () const
 Provides the number of messages in a series. More...
 
size_t TransferMessagesTo2 (BufferedTransformation &target, unsigned int &messageCount, const std::string &channel=DEFAULT_CHANNEL, bool blocking=true)
 Transfer messages from this object to another BufferedTransformation. More...
 
size_t TransferAllTo2 (BufferedTransformation &target, const std::string &channel=DEFAULT_CHANNEL, bool blocking=true)
 Transfer all bytes from this object to another BufferedTransformation. More...
 
size_t ChannelPut (const std::string &channel, byte inByte, bool blocking=true)
 Input a byte for processing on a channel. More...
 
size_t ChannelPut (const std::string &channel, const byte *inString, size_t length, bool blocking=true)
 Input a byte buffer for processing on a channel. More...
 
size_t ChannelPutModifiable (const std::string &channel, byte *inString, size_t length, bool blocking=true)
 Input multiple bytes that may be modified by callee on a channel. More...
 
size_t ChannelPutWord16 (const std::string &channel, word16 value, ByteOrder order=BIG_ENDIAN_ORDER, bool blocking=true)
 Input a 16-bit word for processing on a channel. More...
 
size_t ChannelPutWord32 (const std::string &channel, word32 value, ByteOrder order=BIG_ENDIAN_ORDER, bool blocking=true)
 Input a 32-bit word for processing on a channel. More...
 
size_t ChannelPutWord64 (const std::string &channel, word64 value, ByteOrder order=BIG_ENDIAN_ORDER, bool blocking=true)
 Input a 64-bit word for processing on a channel. More...
 
bool ChannelMessageEnd (const std::string &channel, int propagation=-1, bool blocking=true)
 Signal the end of a message. More...
 
size_t ChannelPutMessageEnd (const std::string &channel, const byte *inString, size_t length, int propagation=-1, bool blocking=true)
 Input multiple bytes for processing and signal the end of a message. More...
 
virtual byte * ChannelCreatePutSpace (const std::string &channel, size_t &size)
 Request space which can be written into by the caller. More...
 
virtual size_t ChannelPutModifiable2 (const std::string &channel, byte *inString, size_t length, int messageEnd, bool blocking)
 Input multiple bytes that may be modified by callee on a channel. More...
 
virtual bool ChannelFlush (const std::string &channel, bool hardFlush, int propagation=-1, bool blocking=true)
 Flush buffered input and/or output on a channel. More...
 
virtual void SetRetrievalChannel (const std::string &channel)
 Sets the default retrieval channel. More...
 
virtual bool Attachable ()
 Determines whether the object allows attachment. More...
 
virtual BufferedTransformationAttachedTransformation ()
 Returns the object immediately attached to this object. More...
 
virtual const BufferedTransformationAttachedTransformation () const
 Returns the object immediately attached to this object. More...
 
virtual void Detach (BufferedTransformation *newAttachment=NULL)
 Delete the current attachment chain and attach a new one. More...
 
virtual void Attach (BufferedTransformation *newAttachment)
 Add newAttachment to the end of attachment chain. More...
 
- Public Member Functions inherited from Algorithm
 Algorithm (bool checkSelfTestStatus=true)
 Interface for all crypto algorithms. More...
 
virtual std::string AlgorithmName () const
 Provides the name of this algorithm. More...
 
virtual std::string AlgorithmProvider () const
 Retrieve the provider of this algorithm. More...
 
- Public Member Functions inherited from Clonable
virtual ClonableClone () const
 Copies this object. More...
 
- Public Member Functions inherited from Waitable
bool Wait (unsigned long milliseconds, CallStack const &callStack)
 Wait on this object. More...
 

Detailed Description

BER General Decoder.

Definition at line 379 of file asn.h.

Constructor & Destructor Documentation

◆ BERGeneralDecoder() [1/3]

BERGeneralDecoder::BERGeneralDecoder ( BufferedTransformation inQueue)
explicit

Construct an ASN.1 decoder.

Parameters
inQueueinput byte queue

BERGeneralDecoder uses DefaultTag

Definition at line 483 of file asn.cpp.

◆ BERGeneralDecoder() [2/3]

BERGeneralDecoder::BERGeneralDecoder ( BufferedTransformation inQueue,
byte  asnTag 
)
explicit

Construct an ASN.1 decoder.

Parameters
inQueueinput byte queue
asnTagASN.1 tag

Definition at line 489 of file asn.cpp.

◆ BERGeneralDecoder() [3/3]

BERGeneralDecoder::BERGeneralDecoder ( BERGeneralDecoder inQueue,
byte  asnTag 
)
explicit

Construct an ASN.1 decoder.

Parameters
inQueueinput byte queue
asnTagASN.1 tag

Definition at line 495 of file asn.cpp.

Member Function Documentation

◆ IsDefiniteLength()

bool BERGeneralDecoder::IsDefiniteLength ( ) const
inline

Determine length encoding.

Returns
true if the ASN.1 object is definite length encoded, false otherwise

Definition at line 404 of file asn.h.

◆ RemainingLength()

lword BERGeneralDecoder::RemainingLength ( ) const
inline

Determine remaining length.

Returns
number of octets that remain to be consumed

RemainingLength() is only valid if IsDefiniteLength() returns true.

Definition at line 412 of file asn.h.

◆ EndReached()

bool BERGeneralDecoder::EndReached ( ) const

Determine end of stream.

Returns
true if all octets have been consumed, false otherwise

Definition at line 527 of file asn.cpp.

◆ PeekByte()

byte BERGeneralDecoder::PeekByte ( ) const

Determine next octet.

Returns
next octet in the stream

PeekByte does not consume the octet.

Exceptions
BERDecodeErrorif there are no octets remaining

Definition at line 538 of file asn.cpp.

◆ CheckByte()

void BERGeneralDecoder::CheckByte ( byte  b)

Determine next octet.

CheckByte reads the next byte in the stream and verifies the octet matches b.

Exceptions
BERDecodeErrorif the next octet is not b

Definition at line 546 of file asn.cpp.

◆ TransferTo2()

size_t BERGeneralDecoder::TransferTo2 ( BufferedTransformation target,
lword &  transferBytes,
const std::string &  channel = DEFAULT_CHANNEL,
bool  blocking = true 
)
virtual

Transfer bytes to another BufferedTransformation.

Parameters
targetthe destination BufferedTransformation
transferBytesthe number of bytes to transfer
channelthe channel on which the transfer should occur
blockingspecifies whether the object should block when processing input
Returns
the number of bytes that remain in the transfer block (i.e., bytes not transferred)

TransferTo2() removes bytes and moves them to the destination. Transfer begins at the index position in the current stream, and not from an absolute position in the stream.

transferBytes is an IN and OUT parameter. When the call is made, transferBytes is the requested size of the transfer. When the call returns, transferBytes is the number of bytes that were transferred.

Implements BufferedTransformation.

Definition at line 569 of file asn.cpp.

◆ CopyRangeTo2()

size_t BERGeneralDecoder::CopyRangeTo2 ( BufferedTransformation target,
lword &  begin,
lword  end = LWORD_MAX,
const std::string &  channel = DEFAULT_CHANNEL,
bool  blocking = true 
) const
virtual

Copy bytes to another BufferedTransformation.

Parameters
targetthe destination BufferedTransformation
beginthe 0-based index of the first byte to copy in the stream
endthe 0-based index of the last byte to copy in the stream
channelthe channel on which the transfer should occur
blockingspecifies whether the object should block when processing input
Returns
the number of bytes that remain in the copy block (i.e., bytes not copied)

CopyRangeTo2 copies bytes to the destination. The bytes are not removed from this object. Copying begins at the index position in the current stream, and not from an absolute position in the stream.

begin is an IN and OUT parameter. When the call is made, begin is the starting position of the copy. When the call returns, begin is the position of the first byte that was not copied (which may be different than end). begin can be used for subsequent calls to CopyRangeTo2().

Implements BufferedTransformation.

Definition at line 578 of file asn.cpp.

◆ MessageEnd()

void BERGeneralDecoder::MessageEnd ( )

Signals the end of messages to the object.

Call this to denote end of sequence

Definition at line 553 of file asn.cpp.


The documentation for this class was generated from the following files: