whisper_library::BitSetCoder< BLOCK_LENGTH > Class Template Reference

Converts the message into bit-blocks and reassembles them to a message (used by TcpHeaderCovertChannel) More...

Public Member Functions
size_t	blockLength ()
vector< bitset< BLOCK_LENGTH > >	encodeMessage (string message)
	encodeMessage takes a string and splits it into parts. More...
string	decodeMessage (vector< bitset< BLOCK_LENGTH > > vector)

Detailed Description

template<size_t BLOCK_LENGTH>
class whisper_library::BitSetCoder< BLOCK_LENGTH >

Converts the message into bit-blocks and reassembles them to a message (used by TcpHeaderCovertChannel)

To use this class, call the function 'encodeMessage' with the message as a string or 'decodeMessage' with the message-blocks in a vector.

Template Parameters

BLOCK_LENGTH

sets the length of the bit-blocks.

Member Function Documentation

template<size_t BLOCK_LENGTH>

size_t whisper_library::BitSetCoder< BLOCK_LENGTH >::blockLength ( )

inline

Returns the size of a message block.

Returns

the size of a message block as number of bits

template<size_t BLOCK_LENGTH>

string whisper_library::BitSetCoder< BLOCK_LENGTH >::decodeMessage ( vector< bitset< BLOCK_LENGTH > >  vector )

inline

decodeMessage takes bit blocks and converts them to characters returned as a string.

Parameters

vector

a vector of bitsets with the bitsets containing the binary representation of ASCII-encoded letters.

Returns

the message as string

template<size_t BLOCK_LENGTH>

vector<bitset<BLOCK_LENGTH> > whisper_library::BitSetCoder< BLOCK_LENGTH >::encodeMessage ( string  message )

inline

encodeMessage takes a string and splits it into parts.

These are returned as a vector of bitsets in order. If you can't divide the bit count by BLOCK_LENGTH, the last bits are filled up with 0's. The bitsets contain the binary representation of ASCI-encoded letters.

Parameters

message

the message to be encoded

Returns

the message as a vector of bitsets with the size of BLOCK_LENGTH