Security Scol plugin
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Implementation of BufferedTransformation's attachment interface. More...
#include <filters.h>
Public Member Functions | |
ATTACHMENT | |
Filter (BufferedTransformation *attachment=NULLPTR) | |
Construct a Filter. | |
bool | Attachable () |
Determine if attachable. | |
BufferedTransformation * | AttachedTransformation () |
Retrieve attached transformation. | |
const BufferedTransformation * | AttachedTransformation () const |
Retrieve attached transformation. | |
void | Detach (BufferedTransformation *newAttachment=NULLPTR) |
Replace an attached transformation. | |
RETRIEVAL OF ONE MESSAGE | |
size_t | TransferTo2 (BufferedTransformation &target, lword &transferBytes, const std::string &channel=DEFAULT_CHANNEL, bool blocking=true) |
Transfer bytes from this object to another BufferedTransformation. | |
size_t | CopyRangeTo2 (BufferedTransformation &target, lword &begin, lword end=LWORD_MAX, const std::string &channel=DEFAULT_CHANNEL, bool blocking=true) const |
Copy bytes from this object to another BufferedTransformation. | |
Public Member Functions inherited from BufferedTransformation | |
BufferedTransformation () | |
Construct a BufferedTransformation. | |
BufferedTransformation & | Ref () |
Provides a reference to this object. | |
virtual void | Attach (BufferedTransformation *newAttachment) |
Add newAttachment to the end of attachment chain. | |
size_t | Put (byte inByte, bool blocking=true) |
Input a byte for processing. | |
size_t | Put (const byte *inString, size_t length, bool blocking=true) |
Input a byte buffer for processing. | |
size_t | PutWord16 (word16 value, ByteOrder order=BIG_ENDIAN_ORDER, bool blocking=true) |
size_t | PutWord32 (word32 value, ByteOrder order=BIG_ENDIAN_ORDER, bool blocking=true) |
size_t | PutWord64 (word64 value, ByteOrder order=BIG_ENDIAN_ORDER, bool blocking=true) |
virtual byte * | CreatePutSpace (size_t &size) |
Request space which can be written into by the caller. | |
virtual bool | CanModifyInput () const |
Determines whether input can be modified by the callee. | |
size_t | PutModifiable (byte *inString, size_t length, bool blocking=true) |
Input multiple bytes that may be modified by callee. | |
bool | MessageEnd (int propagation=-1, bool blocking=true) |
Signals the end of messages to the object. | |
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. | |
virtual size_t | Put2 (const byte *inString, size_t length, int messageEnd, bool blocking)=0 |
Input multiple bytes for processing. | |
virtual size_t | PutModifiable2 (byte *inString, size_t length, int messageEnd, bool blocking) |
Input multiple bytes that may be modified by callee. | |
unsigned int | GetMaxWaitObjectCount () const |
Retrieves the maximum number of waitable objects. | |
void | GetWaitObjects (WaitObjectContainer &container, CallStack const &callStack) |
Retrieves waitable objects. | |
virtual void | IsolatedInitialize (const NameValuePairs ¶meters) |
Initialize or reinitialize this object, without signal propagation. | |
virtual bool | IsolatedFlush (bool hardFlush, bool blocking)=0 |
Flushes data buffered by this object, without signal propagation. | |
virtual bool | IsolatedMessageSeriesEnd (bool blocking) |
Marks the end of a series of messages, without signal propagation. | |
virtual void | SetAutoSignalPropagation (int propagation) |
Set propagation of automatically generated and transferred signals. | |
virtual int | GetAutoSignalPropagation () const |
Retrieve automatic signal propagation value. | |
virtual lword | MaxRetrievable () const |
Provides the number of bytes ready for retrieval. | |
virtual bool | AnyRetrievable () const |
Determines whether bytes are ready for retrieval. | |
virtual size_t | Get (byte &outByte) |
Retrieve a 8-bit byte. | |
virtual size_t | Get (byte *outString, size_t getMax) |
Retrieve a block of bytes. | |
virtual size_t | Peek (byte &outByte) const |
Peek a 8-bit byte. | |
virtual size_t | Peek (byte *outString, size_t peekMax) const |
Peek a block of bytes. | |
size_t | GetWord16 (word16 &value, ByteOrder order=BIG_ENDIAN_ORDER) |
Retrieve a 16-bit word. | |
size_t | GetWord32 (word32 &value, ByteOrder order=BIG_ENDIAN_ORDER) |
Retrieve a 32-bit word. | |
size_t | GetWord64 (word64 &value, ByteOrder order=BIG_ENDIAN_ORDER) |
Retrieve a 64-bit word. | |
size_t | PeekWord16 (word16 &value, ByteOrder order=BIG_ENDIAN_ORDER) const |
Peek a 16-bit word. | |
size_t | PeekWord32 (word32 &value, ByteOrder order=BIG_ENDIAN_ORDER) const |
Peek a 32-bit word. | |
size_t | PeekWord64 (word64 &value, ByteOrder order=BIG_ENDIAN_ORDER) const |
Peek a 64-bit word. | |
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 | |
virtual lword | Skip (lword skipMax=LWORD_MAX) |
Discard skipMax bytes from the output buffer. | |
lword | CopyTo (BufferedTransformation &target, lword copyMax=LWORD_MAX, const std::string &channel=DEFAULT_CHANNEL) const |
Copy bytes from this object to another BufferedTransformation. | |
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. | |
virtual lword | TotalBytesRetrievable () const |
Provides the number of bytes ready for retrieval. | |
virtual unsigned int | NumberOfMessages () const |
Provides the number of meesages processed by this object. | |
virtual bool | AnyMessages () const |
Determines if any messages are available for retrieval. | |
virtual bool | GetNextMessage () |
Start retrieving the next message. | |
virtual unsigned int | SkipMessages (unsigned int count=UINT_MAX) |
Skip a number of meessages. | |
unsigned int | TransferMessagesTo (BufferedTransformation &target, unsigned int count=UINT_MAX, const std::string &channel=DEFAULT_CHANNEL) |
Transfer messages from this object to another BufferedTransformation. | |
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. | |
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. | |
void | CopyAllTo (BufferedTransformation &target, const std::string &channel=DEFAULT_CHANNEL) const |
Copy messages from this object to another BufferedTransformation. | |
virtual bool | GetNextMessageSeries () |
Retrieve the next message in a series. | |
virtual unsigned int | NumberOfMessagesInThisSeries () const |
Provides the number of messages in a series. | |
virtual unsigned int | NumberOfMessageSeries () const |
Provides the number of messages in a series. | |
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. | |
size_t | TransferAllTo2 (BufferedTransformation &target, const std::string &channel=DEFAULT_CHANNEL, bool blocking=true) |
Transfer all bytes from this object to another BufferedTransformation. | |
size_t | ChannelPut (const std::string &channel, byte inByte, bool blocking=true) |
Input a byte for processing on a channel. | |
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. | |
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. | |
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. | |
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. | |
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. | |
bool | ChannelMessageEnd (const std::string &channel, int propagation=-1, bool blocking=true) |
Signal the end of a message. | |
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. | |
virtual byte * | ChannelCreatePutSpace (const std::string &channel, size_t &size) |
Request space which can be written into by the caller. | |
virtual size_t | ChannelPut2 (const std::string &channel, const byte *inString, size_t length, int messageEnd, bool blocking) |
Input multiple bytes for processing on a channel. | |
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. | |
virtual bool | ChannelFlush (const std::string &channel, bool hardFlush, int propagation=-1, bool blocking=true) |
Flush buffered input and/or output on a channel. | |
virtual bool | ChannelMessageSeriesEnd (const std::string &channel, int propagation=-1, bool blocking=true) |
Marks the end of a series of messages on a channel. | |
virtual void | SetRetrievalChannel (const std::string &channel) |
Sets the default retrieval channel. | |
Public Member Functions inherited from Algorithm | |
Algorithm (bool checkSelfTestStatus=true) | |
Interface for all crypto algorithms. | |
virtual std::string | AlgorithmName () const |
Provides the name of this algorithm. | |
virtual std::string | AlgorithmProvider () const |
Retrieve the provider of this algorithm. | |
Public Member Functions inherited from Clonable | |
virtual Clonable * | Clone () const |
Copies this object. | |
Public Member Functions inherited from Waitable | |
bool | Wait (unsigned long milliseconds, CallStack const &callStack) |
Wait on this object. | |
SIGNALS | |
size_t | m_inputPosition |
int | m_continueAt |
void | Initialize (const NameValuePairs ¶meters=g_nullNameValuePairs, int propagation=-1) |
Initialize or reinitialize this object, with signal propagation. | |
bool | Flush (bool hardFlush, int propagation=-1, bool blocking=true) |
Flush buffered input and/or output, with signal propagation. | |
bool | MessageSeriesEnd (int propagation=-1, bool blocking=true) |
Marks the end of a series of messages, with signal propagation. | |
virtual BufferedTransformation * | NewDefaultAttachment () const |
void | Insert (Filter *nextFilter) |
virtual bool | ShouldPropagateMessageEnd () const |
virtual bool | ShouldPropagateMessageSeriesEnd () const |
void | PropagateInitialize (const NameValuePairs ¶meters, int propagation) |
size_t | Output (int outputSite, const byte *inString, size_t length, int messageEnd, bool blocking, const std::string &channel=DEFAULT_CHANNEL) |
Forward processed data on to attached transformation. | |
size_t | OutputModifiable (int outputSite, byte *inString, size_t length, int messageEnd, bool blocking, const std::string &channel=DEFAULT_CHANNEL) |
Output multiple bytes that may be modified by callee. | |
bool | OutputMessageEnd (int outputSite, int propagation, bool blocking, const std::string &channel=DEFAULT_CHANNEL) |
Signals the end of messages to the object. | |
bool | OutputFlush (int outputSite, bool hardFlush, int propagation, bool blocking, const std::string &channel=DEFAULT_CHANNEL) |
Flush buffered input and/or output, with signal propagation. | |
bool | OutputMessageSeriesEnd (int outputSite, int propagation, bool blocking, const std::string &channel=DEFAULT_CHANNEL) |
Marks the end of a series of messages, with signal propagation. | |
Additional Inherited Members | |
Static Protected Member Functions inherited from BufferedTransformation | |
static int | DecrementPropagation (int propagation) |
Decrements the propagation count while clamping at 0. | |
Implementation of BufferedTransformation's attachment interface.
Filter is a cornerstone of the Pipeline trinity. Data flows from Sources, through Filters, and then terminates in Sinks. The difference between a Source and Filter is a Source pumps data, while a Filter does not. The difference between a Filter and a Sink is a Filter allows an attached transformation, while a Sink does not.
See the discussion of BufferedTransformation in cryptlib.h for more details.
Filter::Filter | ( | BufferedTransformation * | attachment = NULLPTR | ) |
Construct a Filter.
attachment | an optional attached transformation |
attachment can be NULL.
Definition at line 26 of file filters.cpp.
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inlinevirtual |
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virtual |
Retrieve attached transformation.
Reimplemented from BufferedTransformation.
Definition at line 36 of file filters.cpp.
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virtual |
Retrieve attached transformation.
Reimplemented from BufferedTransformation.
Definition at line 43 of file filters.cpp.
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virtual |
Copy bytes from this object to another BufferedTransformation.
target | the destination BufferedTransformation |
begin | the 0-based index of the first byte to copy in the stream |
end | the 0-based index of the last byte to copy in the stream |
channel | the channel on which the transfer should occur |
blocking | specifies whether the object should block when processing input |
CopyRangeTo2 copies bytes from this object 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 61 of file filters.cpp.
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Replace an attached transformation.
newAttachment | an optional attached transformation |
newAttachment can be a single filter, a chain of filters or NULL. Pass NULL to remove an existing BufferedTransformation or chain of filters
Reimplemented from BufferedTransformation.
Definition at line 50 of file filters.cpp.
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virtual |
Flush buffered input and/or output, with signal propagation.
hardFlush | is used to indicate whether all data should be flushed |
propagation | the number of attached transformations the Flush() signal should be passed |
blocking | specifies whether the object should block when processing input |
propagation count includes this object. Setting propagation to 1
means this object only. Setting propagation to -1
means unlimited propagation.
Reimplemented from BufferedTransformation.
Reimplemented in Unflushable< Filter >, SecretSharing, and InformationDispersal.
Definition at line 78 of file filters.cpp.
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virtual |
Initialize or reinitialize this object, with signal propagation.
parameters | a set of NameValuePairs to initialize or reinitialize this object |
propagation | the number of attached transformations the Initialize() signal should be passed |
Initialize() is used to initialize or reinitialize an object using a variable number of arbitrarily typed arguments. The function avoids the need for multiple constructors providing all possible combintations of configurable parameters.
propagation count includes this object. Setting propagation to 1
means this object only. Setting propagation to -1
means unlimited propagation.
Reimplemented from BufferedTransformation.
Definition at line 71 of file filters.cpp.
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Definition at line 55 of file filters.cpp.
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virtual |
Marks the end of a series of messages, with signal propagation.
propagation | the number of attached transformations the MessageSeriesEnd() signal should be passed |
blocking | specifies whether the object should block when processing input |
Each object that receives the signal will perform its processing, decrement propagation, and then pass the signal on to attached transformations if the value is not 0.
propagation count includes this object. Setting propagation to 1
means this object only. Setting propagation to -1
means unlimited propagation.
Reimplemented from BufferedTransformation.
Definition at line 95 of file filters.cpp.
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protectedvirtual |
Definition at line 31 of file filters.cpp.
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Forward processed data on to attached transformation.
outputSite | unknown, system crash between keyboard and chair... |
inString | the byte buffer to process |
length | the size of the string, in bytes |
messageEnd | means how many filters to signal MessageEnd() to, including this one |
blocking | specifies whether the object should block when processing input |
channel | the channel to process the data |
Definition at line 127 of file filters.cpp.
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protected |
Flush buffered input and/or output, with signal propagation.
outputSite | unknown, system crash between keyboard and chair... |
hardFlush | is used to indicate whether all data should be flushed |
propagation | the number of attached transformations the Flush() signal should be passed |
blocking | specifies whether the object should block when processing input |
channel | the channel to process the data |
propagation count includes this object. Setting propagation to 1
means this object only. Setting propagation to -1
means unlimited propagation.
Definition at line 136 of file filters.cpp.
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protected |
Signals the end of messages to the object.
outputSite | unknown, system crash between keyboard and chair... |
propagation | the number of attached transformations the MessageEnd() signal should be passed |
blocking | specifies whether the object should block when processing input |
channel | the channel to process the data |
propagation count includes this object. Setting propagation to 1
means this object only. Setting propagation to -1
means unlimited propagation.
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protected |
Marks the end of a series of messages, with signal propagation.
outputSite | unknown, system crash between keyboard and chair... |
propagation | the number of attached transformations the MessageSeriesEnd() signal should be passed |
blocking | specifies whether the object should block when processing input |
channel | the channel to process the data |
Each object that receives the signal will perform its processing, decrement propagation, and then pass the signal on to attached transformations if the value is not 0.
propagation count includes this object. Setting propagation to 1
means this object only. Setting propagation to -1
means unlimited propagation.
Definition at line 147 of file filters.cpp.
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protected |
Output multiple bytes that may be modified by callee.
outputSite | unknown, system crash between keyboard and chair... |
inString | the byte buffer to process |
length | the size of the string, in bytes |
messageEnd | means how many filters to signal MessageEnd() to, including this one |
blocking | specifies whether the object should block when processing input |
channel | the channel to process the data |
Definition at line 118 of file filters.cpp.
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protected |
Definition at line 112 of file filters.cpp.
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inlineprotectedvirtual |
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inlineprotectedvirtual |
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Transfer bytes from this object to another BufferedTransformation.
target | the destination BufferedTransformation |
byteCount | the number of bytes to transfer |
channel | the channel on which the transfer should occur |
blocking | specifies whether the object should block when processing input |
TransferTo2() removes bytes from this object 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.
byteCount is an IN and OUT parameter. When the call is made, byteCount is the requested size of the transfer. When the call returns, byteCount is the number of bytes that were transferred.
Implements BufferedTransformation.
Definition at line 66 of file filters.cpp.