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PBase64 Class Reference

This class is used to encode/decode data using the MIME standard base64 encoding mechanism as defined in RFC1521. More...

`#include <cypher.h>`

Inheritance diagram for PBase64:
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Collaboration diagram for PBase64:
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## Public Member Functions
| PBase64 ()
| Construct a base 64 encoder/decoder and initialise both encode and decode members as in `StartEncoding()` and `StartDecoding()`. More...
void | StartEncoding (bool useCRLFs=true)
void | StartEncoding (const char *endOfLine)
void | ProcessEncoding (const PString &str)
void | ProcessEncoding (const char *cstr)
void | ProcessEncoding (const PBYTEArray &data)
void | ProcessEncoding (const void *dataBlock, PINDEX length)
PString | GetEncodedString ()
| Get the partial Base64 string for the data encoded so far. More...
PString | CompleteEncoding ()
| Complete the base 64 encoding and return the remainder of the encoded Base64 string. More...
void | StartDecoding ()
PBoolean | ProcessDecoding (const PString &str)
| Incorporate the specified data into the base 64 decoding. More...
PBoolean | ProcessDecoding (const char *cstr)
PBoolean | GetDecodedData (void *dataBlock, PINDEX length)
| Get the data decoded so far from the Base64 strings processed. More...
PBYTEArray | GetDecodedData ()
PBoolean | IsDecodeOK ()
| Return a flag to indicate that the input was decoded without any extraneous or illegal characters in it that were ignored. More...
Public Member Functions inherited from PObject
unsigned | GetTraceContextIdentifier () const
| Get PTRACE context identifier. More...
void | SetTraceContextIdentifier (unsigned id)
void | GetTraceContextIdentifier (PObject &obj)
void | GetTraceContextIdentifier (PObject *obj)
void | SetTraceContextIdentifier (const PObject &obj)
void | SetTraceContextIdentifier (const PObject *obj)
virtual | ~PObject ()
virtual PObject * | Clone () const
| Create a copy of the class on the heap. More...
template<class CLS >
CLS * | CloneAs () const
| As for Clone() but converts to specified type. More...
virtual PINDEX | HashFunction () const
| This function yields a hash value required by the `PDictionary` class. More...
virtual Comparison | Compare (const PObject &obj) const
| Compare the two objects and return their relative rank. More...
virtual Comparison | CompareObjectMemoryDirect (const PObject &obj) const
| Determine the byte wise comparison of two objects. More...
bool | operator== (const PObject &obj) const
| Compare the two objects. More...
bool | operator!= (const PObject &obj) const
| Compare the two objects. More...
bool | operator< (const PObject &obj) const
| Compare the two objects. More...
bool | operator> (const PObject &obj) const
| Compare the two objects. More...
bool | operator<= (const PObject &obj) const
| Compare the two objects. More...
bool | operator>= (const PObject &obj) const
| Compare the two objects. More...
virtual const char * | GetClass (unsigned ancestor=0) const
| Get the current dynamic type of the object instance. More...
PBoolean | IsClass (const char *cls) const
virtual PBoolean | InternalIsDescendant (const char *clsName) const
| Determine if the dynamic type of the current instance is a descendent of the specified class. More...
__inline const PObject * | PTraceObjectInstance () const
virtual void | PrintOn (ostream &strm) const
| Output the contents of the object to the stream. More...
virtual void | ReadFrom (istream &strm)
| Input the contents of the object from the stream. More...

## Static Public Member Functions
static PString | Encode (const PString &str, const char *endOfLine="\n")
static PString | Encode (const char *cstr, const char *endOfLine="\n")
static PString | Encode (const PBYTEArray &data, const char *endOfLine="\n")
static PString | Encode (const void *dataBlock, PINDEX length, const char *endOfLine="\n")
static PString | Decode (const PString &str)
| Convert a printable text string to binary data using the Internet MIME standard base 64 content transfer encoding. More...
static PBoolean | Decode (const PString &str, PBYTEArray &data)
static PBoolean | Decode (const PString &str, void *dataBlock, PINDEX length)
Static Public Member Functions inherited from PObject
static Comparison | InternalCompareObjectMemoryDirect (const PObject *obj1, const PObject *obj2, PINDEX size)
| Internal function caled from CompareObjectMemoryDirect() More...
static const char * | Class ()
| Get the name of the class as a C string. More...
static __inline const PObject * | PTraceObjectInstance (const char *)
static __inline const PObject * | PTraceObjectInstance (const PObject *obj)

## Additional Inherited Members
Public Types inherited from PObject
enum | Comparison { LessThan = -1, EqualTo = 0, GreaterThan = 1 }
| Result of the comparison operation performed by the `Compare()` function. More...
Protected Member Functions inherited from PObject
| PObject ()
| Constructor for PObject, made protected so cannot ever create one on its own. More...
Protected Attributes inherited from PObject
unsigned | m_traceContextIdentifier
Friends inherited from PObject

## Detailed Description

This class is used to encode/decode data using the MIME standard base64 encoding mechanism as defined in RFC1521.

To encode a large block of data use the following seqeunce:

          PBase64 base;
          base.StartEncoding();
          while (Read(dataChunk)) {
            base.ProcessEncoding(dataChunk);
            out << base.GetEncodedString();
          }
          out << base.CompleteEncoding();

    if smaller blocks that fit easily in memory are to be encoded the
    <code>Encode()</code> functions can be used to everything in one go.

    To decode a large block of data use the following sequence:

          PBase64 base;
          base.StartDecoding();
          while (Read(str) && ProcessDecoding(str))
            Write(base.GetDecodedData());
          Write(base.GetDecodedData());

    if smaller blocks that fit easily in memory are to be decoded the
    <code>Decode()</code> functions can be used to everything in one go.

## Constructor & Destructor Documentation

PBase64::PBase64 | ( |  | ) |

Construct a base 64 encoder/decoder and initialise both encode and decode members as in `StartEncoding()` and `StartDecoding()`.

## Member Function Documentation

PString PBase64::CompleteEncoding | ( |  | ) |

Complete the base 64 encoding and return the remainder of the encoded Base64 string.

Returns
  Base64 encoded string for the processed data.

static PString PBase64::Decode | ( | const PString & | str | ) |
| static

Convert a printable text string to binary data using the Internet MIME standard base 64 content transfer encoding.

The base64 string is checked and true returned if all perfectly correct. If false is returned then the string had extraneous or illegal characters in it that were ignored. This does not mean that the data is not valid, only that it is suspect.

Returns
  Base 64 string decoded from input string.

static PBoolean PBase64::Decode | ( | const PString & | str,
|  | PBYTEArray & | data
| ) |  |
| static

static PBoolean PBase64::Decode | ( | const PString & | str,
|  | void * | dataBlock,
|  | PINDEX | length
| ) |  |
| static

static PString PBase64::Encode | ( | const PString & | str,
|  | const char * | endOfLine = `"\n"`
| ) |  |
| static

Parameters

  str | String to be encoded to Base64
  endOfLine | String to use for end of line.

Referenced by PMessageDigest::Result::AsBase64().

static PString PBase64::Encode | ( | const char * | cstr,
|  | const char * | endOfLine = `"\n"`
| ) |  |
| static

Parameters

  cstr | C String to be encoded to Base64
  endOfLine | String to use for end of line.

static PString PBase64::Encode | ( | const PBYTEArray & | data,
|  | const char * | endOfLine = `"\n"`
| ) |  |
| static

Parameters

  data | Data block to be encoded to Base64
  endOfLine | String to use for end of line.

static PString PBase64::Encode | ( | const void * | dataBlock,
|  | PINDEX | length,
|  | const char * | endOfLine = `"\n"`
| ) |  |
| static

Parameters

  dataBlock | Pointer to data to be encoded to Base64
  length | Length of the data block.
  endOfLine | String to use for end of line.

PBoolean PBase64::GetDecodedData | ( | void * | dataBlock,
|  | PINDEX | length
| ) |  |

Get the data decoded so far from the Base64 strings processed.

Returns
  Decoded data for the processed Base64 string.

PBYTEArray PBase64::GetDecodedData | ( |  | ) |

PString PBase64::GetEncodedString | ( |  | ) |

Get the partial Base64 string for the data encoded so far.

Returns
  Base64 encoded string for the processed data.

PBoolean PBase64::IsDecodeOK | ( |  | ) |
| inline

Return a flag to indicate that the input was decoded without any extraneous or illegal characters in it that were ignored.

This does not mean that the data is not valid, only that it is suspect.

Returns
  Decoded data for the processed Base64 string.

PBoolean PBase64::ProcessDecoding | ( | const PString & | str | ) |

Incorporate the specified data into the base 64 decoding.

Returns
  true if block was last in the Base64 encoded string.

PBoolean PBase64::ProcessDecoding | ( | const char * | cstr | ) |

void PBase64::ProcessEncoding | ( | const PString & | str | ) |

void PBase64::ProcessEncoding | ( | const char * | cstr | ) |

void PBase64::ProcessEncoding | ( | const PBYTEArray & | data | ) |

void PBase64::ProcessEncoding | ( | const void * | dataBlock,
|  | PINDEX | length
| ) |  |

void PBase64::StartDecoding | ( |  | ) |

void PBase64::StartEncoding | ( | bool | useCRLFs = `true` | ) |

Parameters

  useCRLFs | Use CR, LF pairs in end of line characters.

void PBase64::StartEncoding | ( | const char * | endOfLine | ) |

Parameters

  endOfLine | String to use for end of line.

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

- cypher.h