def decode(data,
unitSize=AbstractType.defaultUnitSize(),
endianness=AbstractType.defaultEndianness(),
sign=AbstractType.defaultSign()):
"""This method convert the specified data in python raw format.
>>> from netzob.all import *
>>> ASCII.decode("hello")
b'hello'
>>> ASCII.decode('\x5a\x6f\x62\x79\x20\x69\x73\x20\x64\x61\x20\x70\x6c\x61\x63\x65\x20\x21')
b'Zoby is da place !'
>>> ASCII.decode(1021)
b'1021'
:param data: the data encoded in ASCII which will be decoded in raw
:type data: the current type
:keyword unitSize: the unitsize to consider while encoding. Values must be one of AbstractType.UNITSIZE_*
:type unitSize: str
:keyword endianness: the endianness to consider while encoding. Values must be AbstractType.ENDIAN_BIG or AbstractType.ENDIAN_LITTLE
:type endianness: str
:keyword sign: the sign to consider while encoding Values must be AbstractType.SIGN_SIGNED or AbstractType.SIGN_UNSIGNED
:type sign: str
:return: data encoded in python raw
:rtype: python raw
:raise: TypeError if parameters are not valid.
"""
if data is None:
raise TypeError("data cannot be None")
return str(data).encode('utf-8')
def decode(data,
unitSize=AbstractType.defaultUnitSize(),
endianness=AbstractType.defaultEndianness(),
sign=AbstractType.defaultSign()):
"""This method convert the specified data in python raw format.
>>> from netzob.all import *
>>> from netzob.Model.Vocabulary.Types.BitArray import BitArray
>>> d = ASCII.decode("hello netzob")
>>> r = BitArray.encode(d)
>>> print(r.to01())
011010000110010101101100011011000110111100100000011011100110010101110100011110100110111101100010
>>> t = BitArray.decode(r)
>>> print(t)
b'hello netzob'
:param data: the data encoded in BitArray which will be decoded in raw
:type data: bitarray
:keyword unitSize: the unit size of the specified data
:type unitSize: :class:`netzob.Model.Vocabulary.Types.UnitSize.UnitSize`
:keyword endianness: the endianness of the specified data
:type endianness: :class:`netzob.Model.Vocabulary.Types.Endianness.Endianness`
:keyword sign: the sign of the specified data
:type sign: :class:`netzob.Model.Vocabulary.Types.Sign.Sign`
:return: data encoded in python raw
:rtype: python raw
:raise: TypeError if parameters are not valid.
"""
if data is None:
raise TypeError("data cannot be None")
return data.tobytes()
def __init__(self, _type, unitSize=None, endianness=None, sign=None):
"""Creates a new encoding function that will encode
the data with the specified types and following its attributes. If an attribute
is not specified (or set to None), it takes its default value defined in :class:`netzob.Model.Vocabulary.Types.AbstractType.AbstractType`.
:parameter _type: the type that will be used to encode
:type _type: :class:`type`
:keyword unitSize: the unitsize of the expected result. Values must be one of AbstractType.UNITSIZE_*
:type unitSize: str
:keyword endianness: the endianness of the expected result. Values must be AbstractType.ENDIAN_BIG or AbstractType.ENDIAN_LITTLE
:type endianness: str
:keyword sign: the sign of the expected result. Values must be AbstractType.SIGN_SIGNED or AbstractType.SIGN_UNSIGNED
:type sign: str
"""
self.type = _type
if unitSize is None:
unitSize = AbstractType.defaultUnitSize()
self.unitSize = unitSize
if endianness is None:
endianness = AbstractType.defaultEndianness()
self.endianness = endianness
if sign is None:
sign = AbstractType.defaultSign()
self.sign = sign
def __init__(self, _type, unitSize=None, endianness=None, sign=None):
"""Creates a new encoding function that will encode
the data with the specified types and following its attributes. If an attribute
is not specified (or set to None), it takes its default value defined in :class:`netzob.Model.Vocabulary.Types.AbstractType.AbstractType`.
:parameter _type: the type that will be used to encode
:type _type: :class:`type`
:keyword unitSize: the unitsize of the expected result. Values must be one of AbstractType.UNITSIZE_*
:type unitSize: str
:keyword endianness: the endianness of the expected result. Values must be AbstractType.ENDIAN_BIG or AbstractType.ENDIAN_LITTLE
:type endianness: str
:keyword sign: the sign of the expected result. Values must be AbstractType.SIGN_SIGNED or AbstractType.SIGN_UNSIGNED
:type sign: str
"""
self.type = _type
if unitSize is None:
unitSize = AbstractType.defaultUnitSize()
self.unitSize = unitSize
if endianness is None:
endianness = AbstractType.defaultEndianness()
self.endianness = endianness
if sign is None:
sign = AbstractType.defaultSign()
self.sign = sign
def __init__(self,
value=None,
interval=None,
unitSize=AbstractType.defaultUnitSize(),
endianness=AbstractType.defaultEndianness(),
sign=AbstractType.defaultSign()):
if value is not None and not isinstance(value, bitarray):
from netzob.Model.Vocabulary.Types.TypeConverter import TypeConverter
from netzob.Model.Vocabulary.Types.BitArray import BitArray
interval = value
value = TypeConverter.convert(value,
Integer,
BitArray,
src_unitSize=unitSize,
src_endianness=endianness,
src_sign=sign,
dst_unitSize=unitSize,
dst_endianness=endianness,
dst_sign=sign)
else:
value = None
if interval is not None:
nbBits = int(
self._computeNbUnitSizeForInterval(interval, unitSize,
sign)) * int(unitSize)
else:
nbBits = int(unitSize)
super(Integer, self).__init__(self.__class__.__name__,
value,
nbBits,
unitSize=unitSize,
endianness=endianness,
sign=sign)
def canParse(self,
data,
unitSize=AbstractType.defaultUnitSize(),
endianness=AbstractType.defaultEndianness(),
sign=AbstractType.defaultSign()):
"""This method returns True if data is an ASCII (utf-8)
>>> from netzob.all import *
>>> ASCII().canParse(TypeConverter.convert("hello netzob", ASCII, BitArray))
True
The ascii table is defined from 0 to 127:
>>> ASCII().canParse(TypeConverter.convert(128, Integer, BitArray, src_sign=AbstractType.SIGN_UNSIGNED))
False
>>> a = ASCII(nbChars=10)
>>> a.canParse(TypeConverter.convert("hellohello", ASCII, BitArray))
True
>>> a.canParse(TypeConverter.convert("hello hello", ASCII, BitArray))
False
>>> a = ASCII(nbChars=(2,20))
>>> a.canParse(TypeConverter.convert("Netzob", ASCII, BitArray))
True
>>> a.canParse(TypeConverter.convert("Hello netzob, what's up ?", ASCII, BitArray))
False
:param data: the data to check
:type data: python raw
:return: True if data can be parsed as an ASCII
:rtype: bool
:raise: TypeError if the data is None
"""
if data is None:
raise TypeError("data cannot be None")
if len(data) == 0:
return False
# Ascii must be 8 bits modulo length
if len(data) % 8 != 0:
return False
rawData = data.tobytes()
try:
rawData.decode('utf-8')
except:
return False
(minChar, maxChar) = self.nbChars
if minChar is not None:
if len(rawData) < minChar:
return False
if maxChar is not None:
if len(rawData) > maxChar:
return False
return True
def __init__(self,
value=None,
nbChars=(None, None),
unitSize=AbstractType.defaultUnitSize(),
endianness=AbstractType.defaultEndianness(),
sign=AbstractType.defaultSign()):
if value is not None and not isinstance(value, bitarray):
from netzob.Model.Vocabulary.Types.TypeConverter import TypeConverter
from netzob.Model.Vocabulary.Types.BitArray import BitArray
value = TypeConverter.convert(
value,
ASCII,
BitArray,
src_unitSize=unitSize,
src_endianness=endianness,
src_sign=sign,
dst_unitSize=unitSize,
dst_endianness=endianness,
dst_sign=sign)
else:
value = None
self.nbChars = nbChars
nbBits = self._convertNbCharsInNbBits(self.nbChars)
super(ASCII, self).__init__(
self.__class__.__name__,
value,
nbBits,
unitSize=unitSize,
endianness=endianness,
sign=sign)
def encode(data,
unitSize=AbstractType.defaultUnitSize(),
endianness=AbstractType.defaultEndianness(),
sign=AbstractType.defaultSign()):
"""This method convert the python raw data to the ASCII.
>>> from netzob.all import *
>>> raw = ASCII.decode("hello zoby!")
>>> print(ASCII.encode(raw))
hello zoby!
:param data: the data encoded in python raw which will be encoded in current type
:type data: python raw
:keyword unitSize: the unitsize to consider while encoding. Values must be one of AbstractType.UNITSIZE_*
:type unitSize: str
:keyword endianness: the endianness to consider while encoding. Values must be AbstractType.ENDIAN_BIG or AbstractType.ENDIAN_LITTLE
:type endianness: str
:keyword sign: the sign to consider while encoding Values must be AbstractType.SIGN_SIGNED or AbstractType.SIGN_UNSIGNED
:type sign: str
:return: data encoded in python raw
:rtype: python raw
:raise: TypeError if parameters are not valid.
"""
if data is None:
raise TypeError("data cannot be None")
res = ""
for ordElt in data:
if ordElt >= 0x20 and ordElt <= 0x7e: # means between ' ' and '~'
res += chr(ordElt)
else:
res += "."
return res
def canParse(self,
data,
unitSize=AbstractType.defaultUnitSize(),
endianness=AbstractType.defaultEndianness(),
sign=AbstractType.defaultSign()):
"""This method returns True if data is a Integer.
For the moment its always true because we consider
the integer type to be very similar to the raw type.
>>> from netzob.all import *
>>> Integer().canParse(TypeConverter.convert("hello netzob", ASCII, Raw))
True
:param data: the data to check
:type data: python raw
:return: True if data is can be parsed as a Integer
:rtype: bool
:raise: TypeError if the data is None
"""
if data is None:
raise TypeError("data cannot be None")
if len(data) == 0:
return False
return True
def __init__(self,
value=None,
network=None,
unitSize=AbstractType.defaultUnitSize(),
endianness=AbstractType.defaultEndianness(),
sign=AbstractType.defaultSign()):
"""Builds an IPv4 domain with optional constraints.
:parameter value: specify a constraints over the expected value.
:type value: an str, an IPAddress or an int which can be parsed as an IPv4 (ex. "192.168.0.10")
:parameter network: if no value is specified (None), a constraints over the network the parsed IP belongs can be specified with this parameter (ex. "192.168.0.0/24")
:type network: an str or an IPAddress which can be parsed as a network IPv4
"""
if value is not None and not isinstance(value, bitarray):
from netzob.Model.Vocabulary.Types.TypeConverter import TypeConverter
from netzob.Model.Vocabulary.Types.BitArray import BitArray
value = TypeConverter.convert(value,
IPv4,
BitArray,
src_unitSize=unitSize,
src_endianness=endianness,
src_sign=sign,
dst_unitSize=unitSize,
dst_endianness=endianness,
dst_sign=sign)
self.network = network
super(IPv4, self).__init__(self.__class__.__name__,
value,
32,
unitSize=unitSize,
endianness=endianness,
sign=sign)
def canParse(self,
data,
unitSize=AbstractType.defaultUnitSize(),
endianness=AbstractType.defaultEndianness(),
sign=AbstractType.defaultSign()):
"""This method returns True if data is a Integer.
For the moment its always true because we consider
the integer type to be very similar to the raw type.
>>> from netzob.all import *
>>> Integer().canParse(TypeConverter.convert("hello netzob", ASCII, Raw))
True
:param data: the data to check
:type data: python raw
:return: True if data is can be parsed as a Integer
:rtype: bool
:raise: TypeError if the data is None
"""
if data is None:
raise TypeError("data cannot be None")
if len(data) == 0:
return False
return True
def decode(data,
unitSize=AbstractType.defaultUnitSize(),
endianness=AbstractType.defaultEndianness(),
sign=AbstractType.defaultSign()):
"""This method convert the specified data in python raw format.
>>> from netzob.all import *
>>> from netzob.Model.Vocabulary.Types.BitArray import BitArray
>>> d = ASCII.decode("hello netzob")
>>> r = BitArray.encode(d)
>>> print(r.to01())
011010000110010101101100011011000110111100100000011011100110010101110100011110100110111101100010
>>> t = BitArray.decode(r)
>>> print(t)
b'hello netzob'
:param data: the data encoded in BitArray which will be decoded in raw
:type data: bitarray
:keyword unitSize: the unit size of the specified data
:type unitSize: :class:`netzob.Model.Vocabulary.Types.UnitSize.UnitSize`
:keyword endianness: the endianness of the specified data
:type endianness: :class:`netzob.Model.Vocabulary.Types.Endianness.Endianness`
:keyword sign: the sign of the specified data
:type sign: :class:`netzob.Model.Vocabulary.Types.Sign.Sign`
:return: data encoded in python raw
:rtype: python raw
:raise: TypeError if parameters are not valid.
"""
if data is None:
raise TypeError("data cannot be None")
return data.tobytes()
def canParse(self,
data,
unitSize=AbstractType.defaultUnitSize(),
endianness=AbstractType.defaultEndianness(),
sign=AbstractType.defaultSign()):
"""This method returns True if data is an ASCII (utf-8)
>>> from netzob.all import *
>>> ASCII().canParse(TypeConverter.convert("hello netzob", ASCII, BitArray))
True
The ascii table is defined from 0 to 127:
>>> ASCII().canParse(TypeConverter.convert(128, Integer, BitArray, src_sign=AbstractType.SIGN_UNSIGNED))
False
>>> a = ASCII(nbChars=10)
>>> a.canParse(TypeConverter.convert("hellohello", ASCII, BitArray))
True
>>> a.canParse(TypeConverter.convert("hello hello", ASCII, BitArray))
False
>>> a = ASCII(nbChars=(2,20))
>>> a.canParse(TypeConverter.convert("Netzob", ASCII, BitArray))
True
>>> a.canParse(TypeConverter.convert("Hello netzob, what's up ?", ASCII, BitArray))
False
:param data: the data to check
:type data: python raw
:return: True if data can be parsed as an ASCII
:rtype: bool
:raise: TypeError if the data is None
"""
if data is None:
raise TypeError("data cannot be None")
if len(data) == 0:
return False
# Ascii must be 8 bits modulo length
if len(data) % 8 != 0:
return False
rawData = data.tobytes()
try:
rawData.decode('utf-8')
except:
return False
(minChar, maxChar) = self.nbChars
if minChar is not None:
if len(rawData) < minChar:
return False
if maxChar is not None:
if len(rawData) > maxChar:
return False
return True
def __init__(self,
value=None,
nbBytes=None,
unitSize=AbstractType.defaultUnitSize(),
endianness=AbstractType.defaultEndianness(),
sign=AbstractType.defaultSign(),
alphabet=None):
if value is not None and not isinstance(value, bitarray):
from netzob.Model.Vocabulary.Types.TypeConverter import TypeConverter
from netzob.Model.Vocabulary.Types.BitArray import BitArray
if isinstance(value, str):
value = TypeConverter.convert(bytes(value, "utf-8"), Raw,
BitArray)
elif isinstance(value, bytes):
value = TypeConverter.convert(value, Raw, BitArray)
nbBits = self._convertNbBytesinNbBits(nbBytes)
self.alphabet = alphabet
super(Raw, self).__init__(self.__class__.__name__,
value,
nbBits,
unitSize=unitSize,
endianness=endianness,
sign=sign)
def decode(data,
unitSize=AbstractType.defaultUnitSize(),
endianness=AbstractType.defaultEndianness(),
sign=AbstractType.defaultSign()):
"""This method convert the specified data in python raw format.
>>> from netzob.all import *
>>> ASCII.decode("hello")
b'hello'
>>> ASCII.decode('\x5a\x6f\x62\x79\x20\x69\x73\x20\x64\x61\x20\x70\x6c\x61\x63\x65\x20\x21')
b'Zoby is da place !'
>>> ASCII.decode(1021)
b'1021'
:param data: the data encoded in ASCII which will be decoded in raw
:type data: the current type
:keyword unitSize: the unitsize to consider while encoding. Values must be one of AbstractType.UNITSIZE_*
:type unitSize: str
:keyword endianness: the endianness to consider while encoding. Values must be AbstractType.ENDIAN_BIG or AbstractType.ENDIAN_LITTLE
:type endianness: str
:keyword sign: the sign to consider while encoding Values must be AbstractType.SIGN_SIGNED or AbstractType.SIGN_UNSIGNED
:type sign: str
:return: data encoded in python raw
:rtype: python raw
:raise: TypeError if parameters are not valid.
"""
if data is None:
raise TypeError("data cannot be None")
return str(data).encode('utf-8')
def encode(data,
unitSize=AbstractType.defaultUnitSize(),
endianness=AbstractType.defaultEndianness(),
sign=AbstractType.defaultSign()):
"""This method convert the python raw data to the ASCII.
>>> from netzob.all import *
>>> raw = ASCII.decode("hello zoby!")
>>> print(ASCII.encode(raw))
hello zoby!
:param data: the data encoded in python raw which will be encoded in current type
:type data: python raw
:keyword unitSize: the unitsize to consider while encoding. Values must be one of AbstractType.UNITSIZE_*
:type unitSize: str
:keyword endianness: the endianness to consider while encoding. Values must be AbstractType.ENDIAN_BIG or AbstractType.ENDIAN_LITTLE
:type endianness: str
:keyword sign: the sign to consider while encoding Values must be AbstractType.SIGN_SIGNED or AbstractType.SIGN_UNSIGNED
:type sign: str
:return: data encoded in python raw
:rtype: python raw
:raise: TypeError if parameters are not valid.
"""
if data is None:
raise TypeError("data cannot be None")
res = ""
for ordElt in data:
if ordElt >= 0x20 and ordElt <= 0x7e: # means between ' ' and '~'
res += chr(ordElt)
else:
res += "."
return res
def __init__(self,
value=None,
nbChars=(None, None),
unitSize=AbstractType.defaultUnitSize(),
endianness=AbstractType.defaultEndianness(),
sign=AbstractType.defaultSign()):
if value is not None and not isinstance(value, bitarray):
from netzob.Model.Vocabulary.Types.TypeConverter import TypeConverter
from netzob.Model.Vocabulary.Types.BitArray import BitArray
value = TypeConverter.convert(value,
ASCII,
BitArray,
src_unitSize=unitSize,
src_endianness=endianness,
src_sign=sign,
dst_unitSize=unitSize,
dst_endianness=endianness,
dst_sign=sign)
else:
value = None
self.nbChars = nbChars
nbBits = self._convertNbCharsInNbBits(self.nbChars)
super(ASCII, self).__init__(self.__class__.__name__,
value,
nbBits,
unitSize=unitSize,
endianness=endianness,
sign=sign)
def canParse(self,
data,
unitSize=AbstractType.defaultUnitSize(),
endianness=AbstractType.defaultEndianness(),
sign=AbstractType.defaultSign()):
"""Computes if specified data can be parsed as a Timestamp with the predefined constraints.
>>> from netzob.all import *
>>> time = Timestamp()
>>> time.canParse(TypeConverter.convert(1444494130, Integer, BitArray, src_unitSize=AbstractType.UNITSIZE_32))
True
>>> # A timestamp is nothing else than 32bits parsed as an unsigned long
>>> time.canParse(TypeConverter.convert("test", ASCII, BitArray))
True
>>> time.canParse(TypeConverter.convert("te", ASCII, BitArray))
False
However, some constrains over the definition of the Timestamp can be set to restrain the accepted values
>>> from netzob.all import *
>>> time = Timestamp(epoch=Timestamp.EPOCH_WINDOWS, unity=Timestamp.UNITY_NANOSECOND, unitSize = AbstractType.UNITSIZE_64)
>>> # the returned year is < 1900
>>> time.canParse(TypeConverter.convert("test", ASCII, BitArray))
False
"""
if data is None:
raise TypeError("data cannot be None")
# Timestamp must be 8 bits modulo length
if len(data) % 8 != 0:
return False
if len(data) < int(self.unitSize):
return False
try:
value = TypeConverter.convert(
data[:int(self.unitSize)],
BitArray,
Integer,
dst_unitSize=AbstractType.UNITSIZE_32,
dst_sign=AbstractType.SIGN_UNSIGNED)
# convert the value in seconds
value = value / self.unity
# add the utc now with the epoch
timestamp_datetime = self.epoch + timedelta(seconds=value)
# convert obtained datetime to timestamp in seconds
result_sec = int(timestamp_datetime.strftime('%s'))
datetime.fromtimestamp(result_sec)
except Exception:
return False
return True
def decode(data,
unitSize=AbstractType.defaultUnitSize(),
endianness=AbstractType.defaultEndianness(),
sign=AbstractType.defaultSign()):
"""This method convert the specified data in python raw format.
>>> from netzob.all import *
>>> print(Integer.decode(23))
b'\\x17'
>>> print(Integer.decode(-1, sign=AbstractType.SIGN_UNSIGNED))
Traceback (most recent call last):
...
struct.error: ubyte format requires 0 <= number <= 255
>>> print(Integer.decode(-1, sign=AbstractType.SIGN_SIGNED))
b'\\xff'
>>> print(Integer.decode(2000000000000000))
Traceback (most recent call last):
...
struct.error: byte format requires -128 <= number <= 127
>>> print(Integer.decode(2000000000000000, unitSize=AbstractType.UNITSIZE_64))
b'\\x00\\x07\\x1a\\xfdI\\x8d\\x00\\x00'
>>> print(Integer.decode(25, unitSize=AbstractType.UNITSIZE_16, endianness=AbstractType.ENDIAN_LITTLE))
b'\\x19\\x00'
>>> print(Integer.decode(25, unitSize=AbstractType.UNITSIZE_16, endianness=AbstractType.ENDIAN_BIG))
b'\\x00\\x19'
>>> val = 167749568
>>> a = Integer.decode(val, unitSize=AbstractType.UNITSIZE_32)
>>> b = Integer.encode(a, unitSize=AbstractType.UNITSIZE_32)
>>> b == val
True
:param data: the data encoded in Integer which will be decoded in raw
:type data: the current type
:keyword unitSize: the unitsize to consider while encoding. Values must be one of AbstractType.UNITSIZE_*
:type unitSize: str
:keyword endianness: the endianness to consider while encoding. Values must be AbstractType.ENDIAN_BIG or AbstractType.ENDIAN_LITTLE
:type endianness: str
:keyword sign: the sign to consider while encoding Values must be AbstractType.SIGN_SIGNED or AbstractType.SIGN_UNSIGNED
:type sign: str
:return: data encoded in python raw
:rtype: python raw
:raise: TypeError if parameters are not valid.
"""
if data is None:
raise TypeError("data cannot be None")
f = Integer.computeFormat(unitSize, endianness, sign)
return struct.pack(f, int(data))
def decode(data,
unitSize=AbstractType.defaultUnitSize(),
endianness=AbstractType.defaultEndianness(),
sign=AbstractType.defaultSign()):
"""This method convert the specified data in python raw format.
>>> from netzob.all import *
>>> print(Integer.decode(23))
b'\\x17'
>>> print(Integer.decode(-1, sign=AbstractType.SIGN_UNSIGNED))
Traceback (most recent call last):
...
struct.error: ubyte format requires 0 <= number <= 255
>>> print(Integer.decode(-1, sign=AbstractType.SIGN_SIGNED))
b'\\xff'
>>> print(Integer.decode(2000000000000000))
Traceback (most recent call last):
...
struct.error: ubyte format requires 0 <= number <= 255
>>> print(Integer.decode(2000000000000000, unitSize=AbstractType.UNITSIZE_64))
b'\\x00\\x07\\x1a\\xfdI\\x8d\\x00\\x00'
>>> print(Integer.decode(25, unitSize=AbstractType.UNITSIZE_16, endianness=AbstractType.ENDIAN_LITTLE))
b'\\x19\\x00'
>>> print(Integer.decode(25, unitSize=AbstractType.UNITSIZE_16, endianness=AbstractType.ENDIAN_BIG))
b'\\x00\\x19'
>>> val = 167749568
>>> a = Integer.decode(val, unitSize=AbstractType.UNITSIZE_32)
>>> b = Integer.encode(a, unitSize=AbstractType.UNITSIZE_32)
>>> b == val
True
:param data: the data encoded in Integer which will be decoded in raw
:type data: the current type
:keyword unitSize: the unitsize to consider while encoding. Values must be one of AbstractType.UNITSIZE_*
:type unitSize: str
:keyword endianness: the endianness to consider while encoding. Values must be AbstractType.ENDIAN_BIG or AbstractType.ENDIAN_LITTLE
:type endianness: str
:keyword sign: the sign to consider while encoding Values must be AbstractType.SIGN_SIGNED or AbstractType.SIGN_UNSIGNED
:type sign: str
:return: data encoded in python raw
:rtype: python raw
:raise: TypeError if parameters are not valid.
"""
if data is None:
raise TypeError("data cannot be None")
f = Integer.computeFormat(unitSize, endianness, sign)
return struct.pack(f, int(data))
def __init__(self,
value=None,
interval=None,
unitSize=None,
endianness=AbstractType.defaultEndianness(),
sign=AbstractType.defaultSign()):
if unitSize is None:
if interval is None: # value handling
if value is None:
unitSize = AbstractType.defaultUnitSize()
else:
unitSize = Integer.checkUnitSizeForValue(value, sign)
else: # interval handling
if isinstance(interval, int):
unitSize = Integer.checkUnitSizeForValue(interval, sign)
elif len(interval) == 2:
unitSizeA = Integer.checkUnitSizeForValue(
interval[0], sign)
unitSizeB = Integer.checkUnitSizeForValue(
interval[1], sign)
unitSize = max(unitSizeA, unitSizeB)
else: # shouldn't happen, since _checkUnitSizeForValue raises an exception before
unitSize = AbstractType.defaultUnitSize()
if value is not None and not isinstance(value, bitarray):
from netzob.Model.Vocabulary.Types.TypeConverter import TypeConverter
from netzob.Model.Vocabulary.Types.BitArray import BitArray
value = TypeConverter.convert(value,
Integer,
BitArray,
src_unitSize=unitSize,
src_endianness=endianness,
src_sign=sign,
dst_unitSize=unitSize,
dst_endianness=endianness,
dst_sign=sign)
if interval is not None:
nbBits = int(
self._computeNbUnitSizeForInterval(interval, unitSize,
sign)) * int(unitSize)
else:
nbBits = int(unitSize)
super(Integer, self).__init__(self.__class__.__name__,
value,
nbBits,
unitSize=unitSize,
endianness=endianness,
sign=sign)
def __init__(self,
value=None,
epoch=EPOCH_UNIX,
unity=UNITY_SECOND,
unitSize=AbstractType.UNITSIZE_32,
endianness=AbstractType.defaultEndianness(),
sign=AbstractType.SIGN_UNSIGNED):
"""Builds a Timestamp domain with optional constraints.
:param value: specifies the value of the timestamp.
:type value: an int, a long or a bitarray
:param epoch: the initial date expressed in UTC from which timestamp is measured. Default value is the UNIX Epoch.
:type datetime.datetime
:param unity: specifies the unity of the timestamp (seconds, milliseconds, nanoseconds). Default value is SECOND.
:type unity: int
"""
if value is not None and not isinstance(value, bitarray):
# converts the specified value in bitarray
value = TypeConverter.convert(value,
Integer,
BitArray,
src_unitSize=unitSize,
src_endianness=endianness,
src_sign=sign)
self.epoch = epoch
self.unity = unity
super(Timestamp, self).__init__(self.__class__.__name__,
value,
32,
unitSize=unitSize,
endianness=endianness,
sign=sign)
def canParse(self,
data,
unitSize=AbstractType.defaultUnitSize(),
endianness=AbstractType.defaultEndianness(),
sign=AbstractType.defaultSign()):
"""For the moment its always true because we consider
the decimal type to be very similar to the raw type.
>>> from netzob.all import *
>>> BitArray().canParse(TypeConverter.convert("hello netzob", ASCII, BitArray))
True
>>> b = BitArray(nbBits=8)
>>> b.canParse(bitarray('01010101'))
True
>>> b.canParse(bitarray('010101011'))
False
:param data: the data to check
:type data: python raw
:return: True if data can be parsed as a BitArray
:rtype: bool
:raise: TypeError if the data is None
"""
if data is None:
raise TypeError("data cannot be None")
if not isinstance(data, bitarray):
raise TypeError("Data should be a python raw ({0}:{1})".format(
data, type(data)))
if len(data) == 0:
return False
(nbMinBits, nbMaxBits) = self.size
nbBitsData = len(data)
if nbMinBits is not None and nbMinBits > nbBitsData:
return False
if nbMaxBits is not None and nbMaxBits < nbBitsData:
return False
return True
def canParse(self,
data,
unitSize=AbstractType.defaultUnitSize(),
endianness=AbstractType.defaultEndianness(),
sign=AbstractType.defaultSign()):
"""For the moment its always true because we consider
the decimal type to be very similar to the raw type.
>>> from netzob.all import *
>>> BitArray().canParse(TypeConverter.convert("hello netzob", ASCII, BitArray))
True
>>> b = BitArray(nbBits=8)
>>> b.canParse(bitarray('01010101'))
True
>>> b.canParse(bitarray('010101011'))
False
:param data: the data to check
:type data: python raw
:return: True if data can be parsed as a BitArray
:rtype: bool
:raise: TypeError if the data is None
"""
if data is None:
raise TypeError("data cannot be None")
if not isinstance(data, bitarray):
raise TypeError("Data should be a python raw ({0}:{1})".format(
data, type(data)))
if len(data) == 0:
return False
(nbMinBits, nbMaxBits) = self.size
nbBitsData = len(data)
if nbMinBits is not None and nbMinBits > nbBitsData:
return False
if nbMaxBits is not None and nbMaxBits < nbBitsData:
return False
return True
def type(self, _type):
if _type is None:
raise TypeError("Type cannot be None")
if _type not in AbstractType.supportedTypes():
raise TypeError(
"The type is not supported, please refer to the list of supported type in AbstractType.supportedTypes()"
)
self.__type = _type
def sign(self, sign):
if sign is None:
raise TypeError("Sign cannot be None.")
if sign not in AbstractType.supportedSign():
raise ValueError(
"This sign is not supported, please refer to the list of supported type in AbstractType.supportedSign()"
)
self.__sign = sign
def endianness(self, endianness):
if endianness is None:
raise TypeError("Endianness cannot be None.")
if endianness not in AbstractType.supportedEndianness():
raise ValueError(
"This endianness is not supported, please refer to the list of supported type in AbstractType.supportedEndianness()"
)
self.__endianness = endianness
def sign(self, sign):
if sign is None:
raise TypeError("Sign cannot be None.")
if sign not in AbstractType.supportedSign():
raise ValueError(
"This sign is not supported, please refer to the list of supported type in AbstractType.supportedSign()"
)
self.__sign = sign
def unitSize(self, unitSize):
if unitSize is None:
raise TypeError("Unitsize cannot be None")
if unitSize not in AbstractType.supportedUnitSizes():
raise TypeError(
"Specified unitsize is not supported, refers to AbstractType.supportedUnitSizes() for the list."
)
self.__unitSize = unitSize
def type(self, _type):
if _type is None:
raise TypeError("Type cannot be None")
if _type not in AbstractType.supportedTypes():
raise TypeError(
"The type is not supported, please refer to the list of supported type in AbstractType.supportedTypes()"
)
self.__type = _type
def unitSize(self, unitSize):
if unitSize is None:
raise TypeError("Unitsize cannot be None.")
if unitSize not in AbstractType.supportedUnitSizes():
raise ValueError(
"This unitSize is not supported, please refer to the list of supported type in AbstractType.supportedUnitSizes()"
)
self.__unitSize = unitSize
def unitSize(self, unitSize):
if unitSize is None:
raise TypeError("Unitsize cannot be None.")
if unitSize not in AbstractType.supportedUnitSizes():
raise ValueError(
"This unitSize is not supported, please refer to the list of supported type in AbstractType.supportedUnitSizes()"
)
self.__unitSize = unitSize
def endianness(self, endianness):
if endianness is None:
raise TypeError("Endianness cannot be None.")
if endianness not in AbstractType.supportedEndianness():
raise ValueError(
"This endianness is not supported, please refer to the list of supported type in AbstractType.supportedEndianness()"
)
self.__endianness = endianness
def encode(data,
unitSize=AbstractType.defaultUnitSize(),
endianness=AbstractType.defaultEndianness(),
sign=AbstractType.defaultSign()):
"""This method convert the python raw data to the BitArray.
It also converts python Raw to a BitArray
>>> from netzob.all import *
>>> from netzob.Model.Vocabulary.Types.BitArray import BitArray
>>> BitArray.encode(Integer.decode(20))
bitarray('00010100')
:param data: the data encoded in python raw which will be encoded in current type
:type data: python raw
:keyword unitSize: the unitsize to consider while encoding. Values must be one of AbstractType.UNITSIZE_*
:type unitSize: str
:keyword endianness: the endianness to consider while encoding. Values must be AbstractType.ENDIAN_BIG or AbstractType.ENDIAN_LITTLE
:type endianness: str
:keyword sign: the sign to consider while encoding Values must be AbstractType.SIGN_SIGNED or AbstractType.SIGN_UNSIGNED
:type sign: str
:return: data encoded in BitArray
:rtype: :class:`netzob.Model.Vocabulary.Types.BitArray.BitArray`
:raise: TypeError if parameters are not valid.
"""
if data is None:
raise TypeError("data cannot be None")
if endianness == AbstractType.ENDIAN_BIG:
endian = 'big'
elif endianness == AbstractType.ENDIAN_LITTLE:
endian = 'little'
else:
raise ValueError("Invalid endianness value")
if isinstance(data, bytes):
norm_data = data
elif isinstance(data, str):
norm_data = bytes(data, "utf-8")
elif isinstance(data, Raw):
return data.value
b = bitarray(endian=endian)
b.frombytes(norm_data)
return b
def endianness(self, endianness):
if endianness is None:
raise TypeError("Endianness cannot be None")
if not endianness in AbstractType.supportedEndianness():
raise TypeError(
"Specified Endianness is not supported, please refer to the list in AbstractType.supportedEndianness()."
)
self.__endianness = endianness
def decode(data,
unitSize=AbstractType.defaultUnitSize(),
endianness=AbstractType.defaultEndianness(),
sign=AbstractType.defaultSign()):
"""Decode the specified IPv4 data into its raw representation.
>>> from netzob.all import *
>>> print(IPv4.decode("127.0.0.1"))
b'\\x7f\\x00\\x00\\x01'
"""
if data is None:
raise TypeError("Data cannot be None")
ip = IPv4()
if not ip.canParse(data):
raise TypeError("Data is not a valid IPv4, cannot decode it.")
ip = IPAddress(data)
return ip.packed
def decode(data,
unitSize=AbstractType.defaultUnitSize(),
endianness=AbstractType.defaultEndianness(),
sign=AbstractType.defaultSign()):
"""Decode the specified IPv4 data into its raw representation.
>>> from netzob.all import *
>>> print(IPv4.decode("127.0.0.1"))
b'\\x7f\\x00\\x00\\x01'
"""
if data is None:
raise TypeError("Data cannot be None")
ip = IPv4()
if not ip.canParse(data):
raise TypeError("Data is not a valid IPv4, cannot decode it.")
ip = IPAddress(data)
return ip.packed
def encode(data,
unitSize=AbstractType.defaultUnitSize(),
endianness=AbstractType.defaultEndianness(),
sign=AbstractType.defaultSign()):
"""This method convert the python raw data to the BitArray.
>>> from netzob.all import *
>>> from netzob.Model.Vocabulary.Types.BitArray import BitArray
>>> BitArray.encode(Integer.decode(20))
bitarray('00010100')
:param data: the data encoded in python raw which will be encoded in current type
:type data: python raw
:keyword unitSize: the unitsize to consider while encoding. Values must be one of AbstractType.UNITSIZE_*
:type unitSize: str
:keyword endianness: the endianness to consider while encoding. Values must be AbstractType.ENDIAN_BIG or AbstractType.ENDIAN_LITTLE
:type endianness: str
:keyword sign: the sign to consider while encoding Values must be AbstractType.SIGN_SIGNED or AbstractType.SIGN_UNSIGNED
:type sign: str
:return: data encoded in BitArray
:rtype: :class:`netzob.Model.Vocabulary.Types.BitArray.BitArray`
:raise: TypeError if parameters are not valid.
"""
if data is None:
raise TypeError("data cannot be None")
if endianness == AbstractType.ENDIAN_BIG:
endian = 'big'
elif endianness == AbstractType.ENDIAN_LITTLE:
endian = 'little'
else:
raise ValueError("Invalid endianness value")
if isinstance(data, bytes):
norm_data = data
elif isinstance(data, str):
norm_data = bytes(data, "utf-8")
b = bitarray(endian=endian)
b.frombytes(norm_data)
return b
def decode(data,
unitSize=AbstractType.defaultUnitSize(),
endianness=AbstractType.defaultEndianness(),
sign=AbstractType.defaultSign()):
"""This method convert the specified data in python raw format.
>>> from netzob.all import *
>>> import os
>>> # Generate 1024 random bytes
>>> randomData = os.urandom(1024)
>>> # Convert to hexastring
>>> hex = TypeConverter.convert(randomData, Raw, HexaString)
>>> print(len(hex))
2048
>>> # Convert back to byte and verify we didn't lost anything
>>> raw = TypeConverter.convert(hex, HexaString, Raw)
>>> print(raw == randomData)
True
:param data: the data encoded in hexaString (str) which will be decoded in raw
:type data: str
:keyword unitSize: the unit size of the specified data
:type unitSize: :class:`netzob.Model.Vocabulary.Types.UnitSize.UnitSize`
:keyword endianness: the endianness of the specified data
:type endianness: :class:`netzob.Model.Vocabulary.Types.Endianness.Endianness`
:keyword sign: the sign of the specified data
:type sign: :class:`netzob.Model.Vocabulary.Types.Sign.Sign`
:return: data encoded in python raw
:rtype: python raw
:raise: TypeError if parameters are not valid.
"""
if data is None:
raise TypeError("data cannot be None")
if len(data) % 2 == 1:
data = '0' + data
return binascii.unhexlify(data)
def canParse(self,
data,
unitSize=AbstractType.defaultUnitSize(),
endianness=AbstractType.defaultEndianness(),
sign=AbstractType.defaultSign()):
"""Computes if specified data can be parsed as raw which is always the case if the data is at least 1 length and aligned on a byte.
>>> from netzob.all import *
>>> Raw().canParse(TypeConverter.convert("hello netzob", ASCII, BitArray))
True
The ascii table is defined from 0 to 127:
>>> Raw().canParse(TypeConverter.convert(128, Integer, BitArray, src_sign=AbstractType.SIGN_UNSIGNED))
True
:param data: the data to check
:type data: python raw
:return: True if data can be parsed as a Raw which is always the case (if len(data)>0)
:rtype: bool
:raise: TypeError if the data is None
"""
if data is None:
raise TypeError("data cannot be None")
if len(data) == 0:
return False
if len(data) % 8 != 0:
return False
if self.alphabet is not None:
data_set = set(data)
for element in data_set:
if element not in self.alphabet:
return False
return True
def __init__(self,
fields,
dataType=None,
name=None,
endianness=AbstractType.defaultEndianness()):
if isinstance(fields, AbstractField):
fields = [fields]
super(CRC32, self).__init__(varType="CRC32",
fieldDependencies=fields,
name=name)
if dataType is None:
dataType = Raw(nbBytes=4)
self.dataType = dataType
self.endianness = endianness
def encode(data,
unitSize=AbstractType.UNITSIZE_32,
endianness=AbstractType.defaultEndianness(),
sign=AbstractType.SIGN_UNSIGNED):
from netzob.Model.Vocabulary.Types.Raw import Raw
intValue = TypeConverter.convert(data,
Raw,
Integer,
dst_unitSize=AbstractType.UNITSIZE_32,
dst_sign=AbstractType.SIGN_UNSIGNED)
parsedTimestamp = datetime.utcfromtimestamp(intValue)
return parsedTimestamp.strftime("%c")
def __init__(self,
value=None,
network=None,
unitSize=AbstractType.defaultUnitSize(),
endianness=AbstractType.defaultEndianness(),
sign=AbstractType.defaultSign()):
"""Builds an IPv4 domain with optional constraints.
:parameter value: specify a constraints over the expected value.
:type value: an str, an IPAddress or an int which can be parsed as an IPv4 (ex. "192.168.0.10")
:parameter network: if no value is specified (None), a constraints over the network the parsed IP belongs can be specified with this parameter (ex. "192.168.0.0/24")
:type network: an str or an IPAddress which can be parsed as a network IPv4
"""
if value is not None and not isinstance(value, bitarray):
from netzob.Model.Vocabulary.Types.TypeConverter import TypeConverter
from netzob.Model.Vocabulary.Types.BitArray import BitArray
value = TypeConverter.convert(
value,
IPv4,
BitArray,
src_unitSize=unitSize,
src_endianness=endianness,
src_sign=sign,
dst_unitSize=unitSize,
dst_endianness=endianness,
dst_sign=sign)
self.network = network
super(IPv4, self).__init__(
self.__class__.__name__,
value,
32,
unitSize=unitSize,
endianness=endianness,
sign=sign)
def __init__(self,
value=None,
interval=None,
unitSize=AbstractType.defaultUnitSize(),
endianness=AbstractType.defaultEndianness(),
sign=AbstractType.defaultSign()):
if value is not None and not isinstance(value, bitarray):
from netzob.Model.Vocabulary.Types.TypeConverter import TypeConverter
from netzob.Model.Vocabulary.Types.BitArray import BitArray
interval = value
value = TypeConverter.convert(
value,
Integer,
BitArray,
src_unitSize=unitSize,
src_endianness=endianness,
src_sign=sign,
dst_unitSize=unitSize,
dst_endianness=endianness,
dst_sign=sign)
else:
value = None
if interval is not None:
nbBits = int(
self._computeNbUnitSizeForInterval(interval, unitSize,
sign)) * int(unitSize)
else:
nbBits = int(unitSize)
super(Integer, self).__init__(
self.__class__.__name__,
value,
nbBits,
unitSize=unitSize,
endianness=endianness,
sign=sign)
def encode(data,
unitSize=AbstractType.defaultUnitSize(),
endianness=AbstractType.defaultEndianness(),
sign=AbstractType.defaultSign()):
"""Encodes the specified data into an IPAddress object
:param data: the data to encode into an IPAddress
:type data: str or raw bytes (BBBB)
:return: the encoded IPAddress
"""
if isinstance(data, (str, int)):
try:
ip = IPAddress(data)
if ip is not None and ip.version == 4 and not ip.is_netmask():
return ip
except:
pass
try:
structFormat = ">"
if endianness == AbstractType.ENDIAN_BIG:
structFormat = ">"
if not sign == AbstractType.SIGN_SIGNED:
structFormat += "bbbb"
else:
structFormat += "BBBB"
quads = list(map(str, struct.unpack(structFormat, data)))
strIP = '.'.join(quads)
ip = IPAddress(strIP)
if ip is not None and ip.version == 4 and not ip.is_netmask():
return ip
except Exception as e:
raise TypeError(
"Impossible encode {0} into an IPv4 data ({1})".format(
data, e))
def encode(data,
unitSize=AbstractType.defaultUnitSize(),
endianness=AbstractType.defaultEndianness(),
sign=AbstractType.defaultSign()):
"""This method convert the python raw data to an HexaString
>>> from netzob.all import *
>>> import os
>>> # Generate 4096 random bytes
>>> randomData = os.urandom(4096)
>>> # Convert to hexastring
>>> hex = TypeConverter.convert(randomData, Raw, HexaString)
>>> print(len(hex))
8192
>>> # Convert back to byte and verify we didn't lost anything
>>> raw = TypeConverter.convert(hex, HexaString, Raw)
>>> print(raw == randomData)
True
:param data: the data encoded in python raw which will be encoded in current type
:type data: python raw
:keyword unitSize: the unitsize to consider while encoding. Values must be one of AbstractType.UNITSIZE_*
:type unitSize: str
:keyword endianness: the endianness to consider while encoding. Values must be AbstractType.ENDIAN_BIG or AbstractType.ENDIAN_LITTLE
:type endianness: str
:keyword sign: the sign to consider while encoding Values must be AbstractType.SIGN_SIGNED or AbstractType.SIGN_UNSIGNED
:type sign: str
:return: data encoded in Hexa String
:rtype: python str
:raise: TypeError if parameters are not valid.
"""
if data is None:
raise TypeError("data cannot be None")
return binascii.hexlify(data)
def encode(data,
unitSize=AbstractType.defaultUnitSize(),
endianness=AbstractType.defaultEndianness(),
sign=AbstractType.defaultSign()):
"""Encodes the specified data into an IPAddress object
:param data: the data to encode into an IPAddress
:type data: str or raw bytes (BBBB)
:return: the encoded IPAddress
"""
if isinstance(data, (str, int)):
try:
ip = IPAddress(data)
if ip is not None and ip.version == 4 and not ip.is_netmask():
return ip
except:
pass
try:
structFormat = ">"
if endianness == AbstractType.ENDIAN_BIG:
structFormat = ">"
if not sign == AbstractType.SIGN_SIGNED:
structFormat += "bbbb"
else:
structFormat += "BBBB"
quads = list(map(str, struct.unpack(structFormat, data)))
strIP = '.'.join(quads)
ip = IPAddress(strIP)
if ip is not None and ip.version == 4 and not ip.is_netmask():
return ip
except Exception as e:
raise TypeError("Impossible encode {0} into an IPv4 data ({1})".
format(data, e))
def encode(data,
unitSize=AbstractType.defaultUnitSize(),
endianness=AbstractType.defaultEndianness(),
sign=AbstractType.defaultSign()):
"""This method convert the python raw data to the ASCII.
>>> from netzob.all import *
>>> raw = ASCII.decode("hello zoby!")
>>> print(ASCII.encode(raw))
hello zoby!
:param data: the data encoded in python raw which will be encoded in current type
:type data: python raw
:keyword unitSize: the unitsize to consider while encoding. Values must be one of AbstractType.UNITSIZE_*
:type unitSize: str
:keyword endianness: the endianness to consider while encoding. Values must be AbstractType.ENDIAN_BIG or AbstractType.ENDIAN_LITTLE
:type endianness: str
:keyword sign: the sign to consider while encoding Values must be AbstractType.SIGN_SIGNED or AbstractType.SIGN_UNSIGNED
:type sign: str
:return: data encoded in python raw
:rtype: python raw
:raise: TypeError if parameters are not valid.
"""
if data is None:
raise TypeError("data cannot be None")
res = ""
for ordElt in data:
try:
res += chr(ordElt)
except:
raise ValueError(
"The valid range for the argument is from 0 through 1,114,111 (0x10FFFF in base 16)"
)
return res
def encode(data,
unitSize=AbstractType.defaultUnitSize(),
endianness=AbstractType.defaultEndianness(),
sign=AbstractType.defaultSign()):
"""This method convert the python raw data to the Integer.
>>> from netzob.all import *
>>> raw = Integer.decode(23)
>>> print(Integer.encode(raw))
23
>>> raw = Integer.decode(1200, unitSize=AbstractType.UNITSIZE_16)
>>> print(Integer.encode(raw, unitSize=AbstractType.UNITSIZE_16))
1200
>>> raw = Integer.decode(25, unitSize=AbstractType.UNITSIZE_16, endianness=AbstractType.ENDIAN_LITTLE)
>>> print(repr(Integer.encode(raw, unitSize=AbstractType.UNITSIZE_16, endianness=AbstractType.ENDIAN_BIG)))
6400
>>> print(repr(Integer.encode(raw, unitSize=AbstractType.UNITSIZE_16, endianness=AbstractType.ENDIAN_LITTLE)))
25
>>> print(Integer.encode(b'\\xcc\\xac\\x9c\\x0c\\x1c\\xacL\\x1c,\\xac', unitSize=AbstractType.UNITSIZE_8))
-395865088909314208584756
>>> raw = b'\\xcc\\xac\\x9c'
>>> print(Integer.encode(raw, unitSize=AbstractType.UNITSIZE_16, endianness=AbstractType.ENDIAN_BIG))
10210476
>>> print(Integer.encode(raw, unitSize=AbstractType.UNITSIZE_32, endianness=AbstractType.ENDIAN_BIG))
13413532
>>> print(Integer.encode(raw, unitSize=AbstractType.UNITSIZE_32, endianness=AbstractType.ENDIAN_LITTLE))
10267852
:param data: the data encoded in python raw which will be encoded in current type
:type data: python raw
:keyword unitSize: the unitsize to consider while encoding. Values must be one of AbstractType.UNITSIZE_*
:type unitSize: str
:keyword endianness: the endianness to consider while encoding. Values must be AbstractType.ENDIAN_BIG or AbstractType.ENDIAN_LITTLE
:type endianness: str
:keyword sign: the sign to consider while encoding Values must be AbstractType.SIGN_SIGNED or AbstractType.SIGN_UNSIGNED
:type sign: str
:return: data encoded in python raw
:rtype: python raw
:raise: TypeError if parameters are not valid.
"""
if data is None:
raise TypeError("data cannot be None")
perWordFormat = Integer.computeFormat(unitSize, endianness, sign)
nbWords = int(len(data) * 8 / int(unitSize))
# Check whether the input data matches unitSize. If not take
# precautions to able to pad it with null bytes later.
padding_nullbytes = 0
rest = (len(data) * 8) % int(unitSize)
if rest != 0:
nbWords += 1
padding_nullbytes = (int(unitSize) - rest) / 8
finalValue = 0
iWord = 0
start = 0
end = nbWords
inc = 1
if endianness == AbstractType.ENDIAN_BIG:
end = 0
start = nbWords
inc = -1
for i in range(start, end, inc):
# Extract the portion that represents the current word
startPos = int(iWord * int(unitSize) / 8)
endPos = int(iWord * int(unitSize) / 8 + int(unitSize) / 8)
wordData = data[startPos:endPos]
# Pad with null bytes to statisfy the unitSize.
if padding_nullbytes > 0 and i == (end - inc):
if endianness == AbstractType.ENDIAN_BIG:
wordData = b'\x00' * int(padding_nullbytes) + wordData
elif endianness == AbstractType.ENDIAN_LITTLE:
wordData += b'\x00' * int(padding_nullbytes)
else:
raise ValueError(
"Invalid endianness value: {0}".format(endianness))
unpackedWord = struct.unpack(perWordFormat, wordData)[0]
unpackedWord = unpackedWord << int(unitSize) * iWord
finalValue = finalValue + unpackedWord
iWord += 1
return finalValue
def canParse(self,
data,
unitSize=AbstractType.defaultUnitSize(),
endianness=AbstractType.defaultEndianness(),
sign=AbstractType.defaultSign()):
"""Computes if specified data can be parsed as an IPv4 with the predefined constraints.
>>> from netzob.all import *
>>> ip = IPv4()
>>> ip.canParse("192.168.0.10")
True
>>> ip.canParse("198.128.0.100")
True
>>> ip.canParse("256.0.0.1")
False
>>> ip.canParse("127.0.0.1")
True
>>> ip.canParse("127.0.0.-1")
False
>>> ip.canParse("::")
False
>>> ip.canParse("0.0.0.0")
False
And with some constraints over the expected IPv4:
>>> ip = IPv4("192.168.0.10")
>>> ip.canParse("192.168.0.10")
True
>>> ip.canParse("192.168.1.10")
False
>>> ip.canParse(3232235530)
True
>>> ip = IPv4("167.20.14.20")
>>> ip.canParse(3232235530)
False
>>> ip.canParse(3232235530)
False
or with contraints over the expected network the ipv4 belongs to:
>>> ip = IPv4(network="192.168.0.0/24")
>>> ip.canParse("192.168.0.10")
True
>>> ip.canParse("192.168.1.10")
False
:param data: the data to check
:type data: python raw
:return: True if data can be parsed as a Raw which is always the case (if len(data)>0)
:rtype: bool
:raise: TypeError if the data is None
"""
if data is None:
raise TypeError("data cannot be None")
try:
ip = IPv4.encode(
data, unitSize=unitSize, endianness=endianness, sign=sign)
if ip is None or ip.version != 4 or ip.is_netmask():
return False
except:
return False
try:
if self.value is not None:
from netzob.Model.Vocabulary.Types.TypeConverter import TypeConverter
from netzob.Model.Vocabulary.Types.BitArray import BitArray
return self.value == TypeConverter.convert(
data,
IPv4,
BitArray,
src_unitSize=unitSize,
src_endianness=endianness,
src_sign=sign,
dst_unitSize=self.unitSize,
dst_endianness=self.endianness,
dst_sign=self.sign)
elif self.network is not None:
return ip in self.network
except:
return False
return True
def __normalizeLeafDomain(domain):
if isinstance(domain, (Data, AbstractRelationVariableLeaf)):
return domain
else:
return AbstractType.normalize(domain).buildDataRepresentation()
