namespace Akenti class OpenSSLBase64Impl : public Base64Impl

This class is the subclass of Base64Impl which implements the functionality of Base64 data encoding and decoding

Inheritance:

Public Methods

OpenSSLBase64Impl ()
Constructs this object
~OpenSSLBase64Impl ()
Destroys this object

Protected Methods

void doEncodeInit ()
Initializes the buffer for encoding
void doEncodeUpdate (const string& data, int offset, int len)
Updates engine for encoding from the input data string starting at the offset and taking the specified number of bytes
string doEncode ()
Encodes all the data accumlated in the buffer and returns the encoded string
void doDecodeInit ()
Initializes the engine for decoding
void doDecodeUpdate (const string& enc, int offset, int len)
Updates engine for decoding from the input data string starting at the offset and taking the specified number of bytes Comment: will not work if the encoded string 'enc' is broken up and this function is called several times to decode the string
string doDecode ()
Completes the decode procedure, returns decoded data in string

Inherited from Base64Impl:

Public Methods

void encodeInit()
void encodeUpdate(const string& data)
void encodeUpdate(const string& data, int offset, int len)
string encode()
void decodeInit()
void decodeUpdate(const string& data)
void decodeUpdate(const string& data, int offset, int len)
string decode()

Documentation

This class is the subclass of Base64Impl which implements the functionality of Base64 data encoding and decoding. This class contains a data buffer and an openssl EVP-encode-context structure. The methods are implemented by calls to the openssl library. The use model for this class is to intialize the object for either encoding or decoding which empties the buffer and sets the context. Data is then appended to the buffer by one or more update calls. Finally a doEncode or doDecode method is called which en/decodes the accumlated data and returns the en/decoded string.
OpenSSLBase64Impl()
Constructs this object.
See Also:
Base64Impl()

~OpenSSLBase64Impl()
Destroys this object

void doEncodeInit()
Initializes the buffer for encoding

void doEncodeUpdate(const string& data, int offset, int len)
Updates engine for encoding from the input data string starting at the offset and taking the specified number of bytes
Parameters:
data - string used to update the engine
offset - int begin index in data
len - int number of bytes used to update the engine

string doEncode()
Encodes all the data accumlated in the buffer and returns the encoded string. It does not reset the data buffer.
Returns:
a Base64 enoded string of all the accumlated data.

void doDecodeInit()
Initializes the engine for decoding

void doDecodeUpdate(const string& enc, int offset, int len)
Updates engine for decoding from the input data string starting at the offset and taking the specified number of bytes Comment: will not work if the encoded string 'enc' is broken up and this function is called several times to decode the string.
Parameters:
data - string used to update the engine
offset - int begin index
len - int number of bytes used to update the engine

string doDecode()
Completes the decode procedure, returns decoded data in string.
Throws:
SecurityException OSBI:doDecode:decoding failed
Returns:
The Base64 decoded data as a string.

This class has no child classes.
Author:
Srilekha Mudumbai Abdelilah Essiari
Version:
1.1 00/05/01

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