embdata(3)
NAME
EmbData
SYNOPSIS
#include <EmbData.h> Public Types enum MODE { EMBED, EXTRACT } enum STATE { READ_MAGIC, READ_VERSION, READ_ENCINFO, READ_NPLAINBITS, READ_ENCRYPTED, END } Public Member Functions EmbData (MODE m, std::string pp, std::string fn='') BitString getBitString (void) bool finished (void) unsigned long getNumBitsRequested (void) void addBits (BitString addbits) void setEncAlgo (EncryptionAlgorithm a) EncryptionAlgorithm getEncAlgo (void) const void setEncMode (EncryptionMode m) EncryptionMode getEncMode (void) const void setCompression (int c) int getCompression (void) const void setChecksum (bool c) bool getChecksum (void) const bool checksumOK (void) const void setData (const std::vector< BYTE > data) std::vector< BYTE > getData (void) const std::string getFileName (void) const Static Public Attributes static const unsigned int MinStegoHeaderSize = 50 the minimum size of the part of the generatred BitString that is not the data Protected Member Functions std::string stripDir (std::string s) Private Attributes MODE Mode STATE State unsigned long NPlainBits unsigned long NumBitsRequested the number of bits that the caller must at least supply to addBits unsigned long NumBitsNeeded exactly the number of bits that the next step will consume from Reservoir and addBits together BitString Reservoir std::string Passphrase unsigned short Version version read from input bitstring EncryptionAlgorithm EncAlgo EncryptionMode EncMode int Compression compression level: 0(none),1(best speed),...,9(best compression) bool Checksum will a checksum be embedded ? unsigned long CRC32 the checksum std::string FileName std::vector< BYTE > Data contains the actual message to be embedded Static Private Attributes static const unsigned int NBitsNPlainBits = 32 number of bits used to code the number of plain bits static const unsigned int NBitsNUncompressedBits = 32 number of bits used to code the number of uncompressed bits static const unsigned int NBitsCrc32 = 32 size of a crc32 checksum in bits static const unsigned short CodeVersion = 0 version of this steghide embedding (stego compatibility of EmbData) static const UWORD32 Magic = 0x73688DUL steghide magic to recognize embedded data (the string 'shm') static const unsigned int NBitsMagic = 24 size (in bits of Magic)
Member Enumeration Documentation
- enum EmbData::MODE
- Enumerator:
- EMBED
- EXTRACT
- enum EmbData::STATE
- Enumerator:
- READ_MAGIC
- READ_VERSION
- READ_ENCINFO
- READ_NPLAINBITS
- READ_ENCRYPTED
- END
Constructor & Destructor Documentation
- EmbData::EmbData (MODE m, std::string pp, std::string fn = '')
- construct a new EmbData object
- Parameters:
m the mode (EMBED or EXTRACT)
pp the passphrase
fn the filename (only need for mode EMBED)
Member Function Documentation
- BitString EmbData::getBitString (void) bool EmbData::finished (void) unsigned long EmbData::getNumBitsRequested (void)
- get the minimum length of the BitString that is to be passed to addBits
- void EmbData::addBits (BitString addbits) void EmbData::setEncAlgo (EncryptionAlgorithm a) EncryptionAlgorithm EmbData::getEncAlgo (void) const void EmbData::setEncMode (EncryptionMode m) EncryptionMode EmbData::getEncMode (void) const void EmbData::setCompression (int c) int EmbData::getCompression (void) const void EmbData::setChecksum (bool c) bool EmbData::getChecksum (void) const bool EmbData::checksumOK (void) const
- check if crc32 checksum is ok (needs filled Data and CRC32 fields)
- Returns:
true iff checksum is ok
- void EmbData::setData (const std::vector< BYTE > data) [inline] std::vector<BYTE> EmbData::getData (void) const [inline] std::string EmbData::getFileName (void) const [inline] std::string EmbData::stripDir (std::string s) [protected]
Member Data Documentation
const unsigned int EmbData::MinStegoHeaderSize = 50 [static] const unsigned int EmbData::NBitsNPlainBits = 32 [static, private] const unsigned int EmbData::NBitsNUncompressedBits = 32 [static, private] const unsigned int EmbData::NBitsCrc32 = 32 [static, private] const unsigned short EmbData::CodeVersion = 0 [static, private] const UWORD32 EmbData::Magic = 0x73688DUL [static, private] const unsigned int EmbData::NBitsMagic = 24 [static, private] MODE EmbData::Mode [private] STATE EmbData::State [private] unsigned long EmbData::NPlainBits [private] unsigned long EmbData::NumBitsRequested [private] unsigned long EmbData::NumBitsNeeded [private] BitString EmbData::Reservoir [private] std::string EmbData::Passphrase [private] unsigned short EmbData::Version [private] EncryptionAlgorithm EmbData::EncAlgo [private] EncryptionMode EmbData::EncMode [private] int EmbData::Compression [private] bool EmbData::Checksum [private] unsigned long EmbData::CRC32 [private] std::string EmbData::FileName [private] std::vector<BYTE> EmbData::Data [private]
Author
- Generated automatically by Doxygen for steghide from the source code.