Crypto++ 8.7
Free C++ class library of cryptographic schemes
Public Member Functions | List of all members
Base64Decoder Class Reference

Base64 decodes data using DUDE. More...

#include <base64.h>

+ Inheritance diagram for Base64Decoder:

Public Member Functions

 Base64Decoder (BufferedTransformation *attachment=NULL)
 Construct a Base64Decoder. More...
 
void IsolatedInitialize (const NameValuePairs &parameters)
 Initialize or reinitialize this object, without signal propagation. More...
 
- Public Member Functions inherited from BaseN_Decoder
 BaseN_Decoder (BufferedTransformation *attachment=NULL)
 Construct a BaseN_Decoder. More...
 
 BaseN_Decoder (const int *lookup, int log2base, BufferedTransformation *attachment=NULL)
 Construct a BaseN_Decoder. More...
 
void IsolatedInitialize (const NameValuePairs &parameters)
 Initialize or reinitialize this object, without signal propagation. More...
 
size_t Put2 (const byte *begin, size_t length, int messageEnd, bool blocking)
 Input multiple bytes for processing. More...
 
- Public Member Functions inherited from Unflushable< Filter >
bool Flush (bool completeFlush, int propagation=-1, bool blocking=true)
 Flush buffered input and/or output, with signal propagation. More...
 
bool IsolatedFlush (bool hardFlush, bool blocking)
 Flushes data buffered by this object, without signal propagation. More...
 
bool ChannelFlush (const std::string &channel, bool hardFlush, int propagation=-1, bool blocking=true)
 Flush buffered input and/or output on a channel. More...
 
- Public Member Functions inherited from Filter
 Filter (BufferedTransformation *attachment=NULL)
 Construct a Filter. More...
 
bool Attachable ()
 Determine if attachable. More...
 
BufferedTransformationAttachedTransformation ()
 Retrieve attached transformation. More...
 
const BufferedTransformationAttachedTransformation () const
 Retrieve attached transformation. More...
 
void Detach (BufferedTransformation *newAttachment=NULL)
 Replace an attached transformation. More...
 
size_t TransferTo2 (BufferedTransformation &target, lword &transferBytes, const std::string &channel=DEFAULT_CHANNEL, bool blocking=true)
 Transfer bytes from this object 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 from this object to another BufferedTransformation. More...
 
void Initialize (const NameValuePairs &parameters=g_nullNameValuePairs, int propagation=-1)
 Initialize or reinitialize this object, with signal propagation. More...
 
bool MessageSeriesEnd (int propagation=-1, bool blocking=true)
 Marks the end of a series of messages, with signal propagation. More...
 
- Public Member Functions inherited from BufferedTransformation
 BufferedTransformation ()
 Construct a BufferedTransformation. More...
 
BufferedTransformationRef ()
 Provides a reference to this object. More...
 
virtual void Attach (BufferedTransformation *newAttachment)
 Add newAttachment to the end of attachment chain. 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 byteCreatePutSpace (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. More...
 
void GetWaitObjects (WaitObjectContainer &container, CallStack const &callStack)
 Retrieves waitable objects. More...
 
virtual bool IsolatedMessageSeriesEnd (bool blocking)
 Marks the end of a series of messages, without signal propagation. More...
 
virtual void SetAutoSignalPropagation (int propagation)
 Set propagation of automatically generated and transferred signals. More...
 
virtual int GetAutoSignalPropagation () const
 Retrieve automatic signal propagation value. 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 bytes from this object to another BufferedTransformation. 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 unsigned int NumberOfMessages () const
 Provides the number of meesages processed by this object. More...
 
virtual bool AnyMessages () const
 Determines if any messages are available for retrieval. More...
 
virtual bool GetNextMessage ()
 Start retrieving the next message. 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 byteChannelCreatePutSpace (const std::string &channel, size_t &size)
 Request space which can be written into by the caller. More...
 
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. 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 ChannelMessageSeriesEnd (const std::string &channel, int propagation=-1, bool blocking=true)
 Marks the end of a series of messages on a channel. More...
 
virtual void SetRetrievalChannel (const std::string &channel)
 Sets the default retrieval channel. 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
virtual unsigned int GetMaxWaitObjectCount () const =0
 Maximum number of wait objects that this object can return. More...
 
virtual void GetWaitObjects (WaitObjectContainer &container, CallStack const &callStack)=0
 Retrieves waitable objects. More...
 
bool Wait (unsigned long milliseconds, CallStack const &callStack)
 Wait on this object. More...
 

Additional Inherited Members

- Static Public Member Functions inherited from BaseN_Decoder
static void InitializeDecodingLookupArray (int *lookup, const byte *alphabet, unsigned int base, bool caseInsensitive)
 Initializes BaseN lookup array. More...
 

Detailed Description

Base64 decodes data using DUDE.

Base64 encodes data per RFC 4648, Base 64 Encoding.

Definition at line 57 of file base64.h.

Constructor & Destructor Documentation

◆ Base64Decoder()

Base64Decoder::Base64Decoder ( BufferedTransformation attachment = NULL)
inline

Construct a Base64Decoder.

Parameters
attachmenta BufferedTrasformation to attach to this object
See also
IsolatedInitialize() for an example of modifying an encoder after construction.

Definition at line 63 of file base64.h.

Member Function Documentation

◆ IsolatedInitialize()

void Base64Decoder::IsolatedInitialize ( const NameValuePairs parameters)
virtual

Initialize or reinitialize this object, without signal propagation.

Parameters
parametersa set of NameValuePairs used to initialize this object

IsolatedInitialize() is used to initialize or reinitialize an object using a variable number of arbitrarily typed arguments. IsolatedInitialize() does not call Initialize() on attached transformations. If initialization should be propagated, then use the Initialize() function.

The default decoding alpahbet is RFC 4868. You can change the to RFC 4868 web safe alphabet by performing the following:

    int lookup[256];
    const byte ALPHABET[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_";
    Base64Decoder::InitializeDecodingLookupArray(lookup, ALPHABET, 64, false);

    Base64Decoder decoder;
    AlgorithmParameters params = MakeParameters(Name::DecodingLookupArray(),(const int *)lookup);
    decoder.IsolatedInitialize(params);
See also
Base64URLDecoder for a decoder that provides the web safe alphabet, and Base64Encoder::IsolatedInitialize() for an example of modifying an encoder's alphabet after construction.

Reimplemented from BufferedTransformation.

Definition at line 86 of file base64.cpp.


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