def decode(openPath, mapSeed, password="", zeroTerm=True, file=None): """decode data from an text file using homoglyphs Args: openPath (string): path to the stego-text file to decode mapSeed (string): seed to generate the lsb map password (str, optional): password to encrypt the data with. Defaults to "". zeroTerm (boolean, optional): stop decoding on \x00 (NUL). Defaults to True. file (<file>, optional): file pointer. Defaults to None. Returns: bytes: data from the text file """ with open(openPath, encoding="utf-8") as openData: fileData = openData.read() position = 0 data = [] decodeMap = getMap(fileData, mapSeed) for _char in fileData: byte = 0 shift = 0 while shift < 8: if decodeMap[position] > 0: byte, shift = decodeGlyph(fileData, position, byte, shift) position += 1 if byte == 0 and zeroTerm: break data.append(byte) result = otp(bytes(data), password, False) return toFile(result, file) if file else result
def encode(openPath, writePath, data, mapSeed, password=""):
"""encode a text file with data using homoglyphs
Args:
openPath (string): path to the original text file to open
writePath (string): path to write the stego-text file
data (string): data to encode
mapSeed (string): seed to generate the lsb map
password (str, optional): password to encrypt the data with. Defaults to "".
"""
with open(openPath, encoding="utf-8") as openData:
fileData = openData.read()
position = 0
output = []
data = otp(toBin(data), password) + b"\x00"
encodeMap = getMap(fileData, mapSeed)
systemRandom = SystemRandom()
for char in data:
shift = 0
while shift < 8:
if encodeMap[position] > 0:
result, shift = encodeGlyph(fileData, position, char, shift)
else:
result, _shift = encodeGlyph(fileData, position,
systemRandom.randint(0, 1) << shift, shift)
output.append(result)
position += 1
output.append(fileData[position:])
with open(writePath, "w", encoding="utf-8") as writeData:
writeData.write("".join(output))
def decode(self, mapSeed, password="", zeroTerm=True, file=None):
"""decode data from an array using lsb steganography
Args:
mapSeed (string): seed to generate the lsb map
password (str, optional): password to encrypt the data with. Defaults to "".
zeroTerm (boolean, optional): stop decoding on \x00 (NUL). Defaults to True.
file (<file>, optional): file pointer. Defaults to None.
Returns:
bytes: data from the image
"""
lsbMap = getMap(self.array, mapSeed)
data = []
while self.pointer in range(self.arrayLen):
byte = 0
shift = 0
while shift < 8:
if lsbMap[self.pointer] > 0:
bit = self.getLsb() # Little endian
byte += bit << shift
shift += 1
else:
self.pointer += 1 # Increment pointer anyway
if byte == 0 and zeroTerm:
break
data.append(byte)
result = otp(bytes(data), password, False)
return toFile(result, file) if file else result
def encode(openPath, writePath, data, mapSeed, password="", safe=True):
"""encode a text file with data using zero width chars
Args:
openPath (string): path to the original text file to open
writePath (string): path to write the stego-text file
data (string|bytes|<file>): data to encode
mapSeed (string): seed to generate the lsb map
password (str, optional): password to encrypt the data with. Defaults to "".
safe (boolean, optional): use a reduced set of chars to show in fewer
editors. Defaults to True.
"""
with open(openPath, "rb") as openData:
fileData = openData.read()
position = 0
pointer = 0
zwcMap = getMap(fileData, mapSeed)
encodeData = otp(toBin(data), password) + b"\x00"
while pointer < len(encodeData):
if zwcMap[position] > 0:
position, fileData = encodeCharZero(fileData, position,
encodeData[pointer], safe)
pointer += 1
else:
position += getUtf8Size(fileData,
position)[0] # increment by char size
with open(writePath, "wb") as writeData:
writeData.write(fileData)
def encode(self, mapSeed, password=""):
"""encode an array with data using lsb steganography
Args:
mapSeed (string): seed to generate the lsb map
password (str, optional): password to encrypt the data with. Defaults to "".
"""
data = otp(self.data, password) + b"\x00"
lsbMap = getMap(self.array, mapSeed)
systemRandom = SystemRandom()
for char in data:
shift = 0
while shift < 8:
if lsbMap[self.pointer] > 0:
self.setLsb(char >> shift & 1)
shift += 1
else:
self.setLsb(systemRandom.randint(0, 1))
return self.array
def decode(openPath,
mapSeed,
password="",
zeroTerm=True,
file=None,
safe=True):
"""decode data from a text file using zero width chars
Args:
openPath (string): path to the stego-text file to decode
mapSeed (string): seed to generate the lsb map
password (str, optional): password to encrypt the data with. Defaults to "".
zeroTerm (boolean, optional): stop decoding on \x00 (NUL). Defaults to True.
file (<file>, optional): file pointer. Defaults to None.
safe (boolean, optional): use a reduced set of chars to show in fewer
editors. Defaults to True.
Returns:
bytes: data from the text file
"""
with open(openPath, "rb") as openData:
fileData = openData.read()
position = 0
data = []
zwcMap = getMap(fileData, mapSeed)
for _char in fileData:
if zwcMap[position] > 0:
position, byte = decodeCharZero(fileData, position, safe)
if byte == 0 and zeroTerm:
break
data.append(byte)
else:
position += getUtf8Size(fileData,
position)[0] # increment by char size
result = otp(bytes(data), password, False)
return toFile(result, file) if file else result