mirror of
https://github.com/fail0verflow/hbc.git
synced 2024-11-17 07:09:21 +01:00
336 lines
8.9 KiB
Python
336 lines
8.9 KiB
Python
|
import struct, sys
|
||
|
|
|
||
|
|
class StructType(tuple):
|
||
|
|
def __getitem__(self, value):
|
||
|
|
return [self] * value
|
||
|
|
def __call__(self, value, endian='<'):
|
||
|
|
if isinstance(value, str):
|
||
|
|
return struct.unpack(endian + tuple.__getitem__(self, 0), value[:tuple.__getitem__(self, 1)])[0]
|
||
|
|
else:
|
||
|
|
return struct.pack(endian + tuple.__getitem__(self, 0), value)
|
||
|
|
|
||
|
|
class StructException(Exception):
|
||
|
|
pass
|
||
|
|
|
||
|
|
class Struct(object):
|
||
|
|
__slots__ = ('__attrs__', '__baked__', '__defs__', '__endian__', '__next__', '__sizes__', '__values__')
|
||
|
|
int8 = StructType(('b', 1))
|
||
|
|
uint8 = StructType(('B', 1))
|
||
|
|
|
||
|
|
int16 = StructType(('h', 2))
|
||
|
|
uint16 = StructType(('H', 2))
|
||
|
|
|
||
|
|
int32 = StructType(('l', 4))
|
||
|
|
uint32 = StructType(('L', 4))
|
||
|
|
|
||
|
|
int64 = StructType(('q', 8))
|
||
|
|
uint64 = StructType(('Q', 8))
|
||
|
|
|
||
|
|
float = StructType(('f', 4))
|
||
|
|
|
||
|
|
@classmethod
|
||
|
|
def string(cls, len, offset=0, encoding=None, stripNulls=False, value=''):
|
||
|
|
return StructType(('string', (len, offset, encoding, stripNulls, value)))
|
||
|
|
|
||
|
|
LE = '<'
|
||
|
|
BE = '>'
|
||
|
|
__endian__ = '<'
|
||
|
|
|
||
|
|
def __init__(self, func=None, unpack=None, **kwargs):
|
||
|
|
self.__defs__ = []
|
||
|
|
self.__sizes__ = []
|
||
|
|
self.__attrs__ = []
|
||
|
|
self.__values__ = {}
|
||
|
|
self.__next__ = True
|
||
|
|
self.__baked__ = False
|
||
|
|
|
||
|
|
if func == None:
|
||
|
|
self.__format__()
|
||
|
|
else:
|
||
|
|
sys.settrace(self.__trace__)
|
||
|
|
func()
|
||
|
|
for name in func.func_code.co_varnames:
|
||
|
|
value = self.__frame__.f_locals[name]
|
||
|
|
self.__setattr__(name, value)
|
||
|
|
|
||
|
|
self.__baked__ = True
|
||
|
|
|
||
|
|
if unpack != None:
|
||
|
|
if isinstance(unpack, tuple):
|
||
|
|
self.unpack(*unpack)
|
||
|
|
else:
|
||
|
|
self.unpack(unpack)
|
||
|
|
|
||
|
|
if len(kwargs):
|
||
|
|
for name in kwargs:
|
||
|
|
self.__values__[name] = kwargs[name]
|
||
|
|
|
||
|
|
def __trace__(self, frame, event, arg):
|
||
|
|
self.__frame__ = frame
|
||
|
|
sys.settrace(None)
|
||
|
|
|
||
|
|
def __setattr__(self, name, value):
|
||
|
|
if name in self.__slots__:
|
||
|
|
return object.__setattr__(self, name, value)
|
||
|
|
|
||
|
|
if self.__baked__ == False:
|
||
|
|
if not isinstance(value, list):
|
||
|
|
value = [value]
|
||
|
|
attrname = name
|
||
|
|
else:
|
||
|
|
attrname = '*' + name
|
||
|
|
|
||
|
|
self.__values__[name] = None
|
||
|
|
|
||
|
|
for sub in value:
|
||
|
|
if isinstance(sub, Struct):
|
||
|
|
sub = sub.__class__
|
||
|
|
try:
|
||
|
|
if issubclass(sub, Struct):
|
||
|
|
sub = ('struct', sub)
|
||
|
|
except TypeError:
|
||
|
|
pass
|
||
|
|
type_, size = tuple(sub)
|
||
|
|
if type_ == 'string':
|
||
|
|
self.__defs__.append(Struct.string)
|
||
|
|
self.__sizes__.append(size)
|
||
|
|
self.__attrs__.append(attrname)
|
||
|
|
self.__next__ = True
|
||
|
|
|
||
|
|
if attrname[0] != '*':
|
||
|
|
self.__values__[name] = size[3]
|
||
|
|
elif self.__values__[name] == None:
|
||
|
|
self.__values__[name] = [size[3] for val in value]
|
||
|
|
elif type_ == 'struct':
|
||
|
|
self.__defs__.append(Struct)
|
||
|
|
self.__sizes__.append(size)
|
||
|
|
self.__attrs__.append(attrname)
|
||
|
|
self.__next__ = True
|
||
|
|
|
||
|
|
if attrname[0] != '*':
|
||
|
|
self.__values__[name] = size()
|
||
|
|
elif self.__values__[name] == None:
|
||
|
|
self.__values__[name] = [size() for val in value]
|
||
|
|
else:
|
||
|
|
if self.__next__:
|
||
|
|
self.__defs__.append('')
|
||
|
|
self.__sizes__.append(0)
|
||
|
|
self.__attrs__.append([])
|
||
|
|
self.__next__ = False
|
||
|
|
|
||
|
|
self.__defs__[-1] += type_
|
||
|
|
self.__sizes__[-1] += size
|
||
|
|
self.__attrs__[-1].append(attrname)
|
||
|
|
|
||
|
|
if attrname[0] != '*':
|
||
|
|
self.__values__[name] = 0
|
||
|
|
elif self.__values__[name] == None:
|
||
|
|
self.__values__[name] = [0 for val in value]
|
||
|
|
else:
|
||
|
|
try:
|
||
|
|
self.__values__[name] = value
|
||
|
|
except KeyError:
|
||
|
|
raise AttributeError(name)
|
||
|
|
|
||
|
|
def __getattr__(self, name):
|
||
|
|
if self.__baked__ == False:
|
||
|
|
return name
|
||
|
|
else:
|
||
|
|
try:
|
||
|
|
return self.__values__[name]
|
||
|
|
except KeyError:
|
||
|
|
raise AttributeError(name)
|
||
|
|
|
||
|
|
def __len__(self):
|
||
|
|
ret = 0
|
||
|
|
arraypos, arrayname = None, None
|
||
|
|
|
||
|
|
for i in range(len(self.__defs__)):
|
||
|
|
sdef, size, attrs = self.__defs__[i], self.__sizes__[i], self.__attrs__[i]
|
||
|
|
|
||
|
|
if sdef == Struct.string:
|
||
|
|
size, offset, encoding, stripNulls, value = size
|
||
|
|
if isinstance(size, str):
|
||
|
|
size = self.__values__[size] + offset
|
||
|
|
elif sdef == Struct:
|
||
|
|
if attrs[0] == '*':
|
||
|
|
if arrayname != attrs:
|
||
|
|
arrayname = attrs
|
||
|
|
arraypos = 0
|
||
|
|
size = len(self.__values__[attrs[1:]][arraypos])
|
||
|
|
size = len(self.__values__[attrs])
|
||
|
|
|
||
|
|
ret += size
|
||
|
|
|
||
|
|
return ret
|
||
|
|
|
||
|
|
def unpack(self, data, pos=0):
|
||
|
|
for name in self.__values__:
|
||
|
|
if not isinstance(self.__values__[name], Struct):
|
||
|
|
self.__values__[name] = None
|
||
|
|
elif self.__values__[name].__class__ == list and len(self.__values__[name]) != 0:
|
||
|
|
if not isinstance(self.__values__[name][0], Struct):
|
||
|
|
self.__values__[name] = None
|
||
|
|
|
||
|
|
arraypos, arrayname = None, None
|
||
|
|
|
||
|
|
for i in range(len(self.__defs__)):
|
||
|
|
sdef, size, attrs = self.__defs__[i], self.__sizes__[i], self.__attrs__[i]
|
||
|
|
|
||
|
|
if sdef == Struct.string:
|
||
|
|
size, offset, encoding, stripNulls, value = size
|
||
|
|
if isinstance(size, str):
|
||
|
|
size = self.__values__[size] + offset
|
||
|
|
|
||
|
|
temp = data[pos:pos+size]
|
||
|
|
if len(temp) != size:
|
||
|
|
raise StructException('Expected %i byte string, got %i' % (size, len(temp)))
|
||
|
|
|
||
|
|
if encoding != None:
|
||
|
|
temp = temp.decode(encoding)
|
||
|
|
|
||
|
|
if stripNulls:
|
||
|
|
temp = temp.rstrip('\0')
|
||
|
|
|
||
|
|
if attrs[0] == '*':
|
||
|
|
name = attrs[1:]
|
||
|
|
if self.__values__[name] == None:
|
||
|
|
self.__values__[name] = []
|
||
|
|
self.__values__[name].append(temp)
|
||
|
|
else:
|
||
|
|
self.__values__[attrs] = temp
|
||
|
|
pos += size
|
||
|
|
elif sdef == Struct:
|
||
|
|
if attrs[0] == '*':
|
||
|
|
if arrayname != attrs:
|
||
|
|
arrayname = attrs
|
||
|
|
arraypos = 0
|
||
|
|
name = attrs[1:]
|
||
|
|
self.__values__[attrs][arraypos].unpack(data, pos)
|
||
|
|
pos += len(self.__values__[attrs][arraypos])
|
||
|
|
arraypos += 1
|
||
|
|
else:
|
||
|
|
self.__values__[attrs].unpack(data, pos)
|
||
|
|
pos += len(self.__values__[attrs])
|
||
|
|
else:
|
||
|
|
values = struct.unpack(self.__endian__+sdef, data[pos:pos+size])
|
||
|
|
pos += size
|
||
|
|
j = 0
|
||
|
|
for name in attrs:
|
||
|
|
if name[0] == '*':
|
||
|
|
name = name[1:]
|
||
|
|
if self.__values__[name] == None:
|
||
|
|
self.__values__[name] = []
|
||
|
|
self.__values__[name].append(values[j])
|
||
|
|
else:
|
||
|
|
self.__values__[name] = values[j]
|
||
|
|
j += 1
|
||
|
|
|
||
|
|
return self
|
||
|
|
|
||
|
|
def pack(self):
|
||
|
|
arraypos, arrayname = None, None
|
||
|
|
|
||
|
|
ret = ''
|
||
|
|
for i in range(len(self.__defs__)):
|
||
|
|
sdef, size, attrs = self.__defs__[i], self.__sizes__[i], self.__attrs__[i]
|
||
|
|
|
||
|
|
if sdef == Struct.string:
|
||
|
|
size, offset, encoding, stripNulls, value = size
|
||
|
|
if isinstance(size, str):
|
||
|
|
size = self.__values__[size]+offset
|
||
|
|
|
||
|
|
if attrs[0] == '*':
|
||
|
|
if arrayname != attrs:
|
||
|
|
arraypos = 0
|
||
|
|
arrayname = attrs
|
||
|
|
temp = self.__values__[attrs[1:]][arraypos]
|
||
|
|
arraypos += 1
|
||
|
|
else:
|
||
|
|
temp = self.__values__[attrs]
|
||
|
|
|
||
|
|
if encoding != None:
|
||
|
|
temp = temp.encode(encoding)
|
||
|
|
|
||
|
|
temp = temp[:size]
|
||
|
|
ret += temp + ('\0' * (size - len(temp)))
|
||
|
|
elif sdef == Struct:
|
||
|
|
if attrs[0] == '*':
|
||
|
|
if arrayname != attrs:
|
||
|
|
arraypos = 0
|
||
|
|
arrayname = attrs
|
||
|
|
ret += self.__values__[attrs[1:]][arraypos].pack()
|
||
|
|
arraypos += 1
|
||
|
|
else:
|
||
|
|
ret += self.__values__[attrs].pack()
|
||
|
|
else:
|
||
|
|
values = []
|
||
|
|
for name in attrs:
|
||
|
|
if name[0] == '*':
|
||
|
|
if arrayname != name:
|
||
|
|
arraypos = 0
|
||
|
|
arrayname = name
|
||
|
|
values.append(self.__values__[name[1:]][arraypos])
|
||
|
|
arraypos += 1
|
||
|
|
else:
|
||
|
|
values.append(self.__values__[name])
|
||
|
|
|
||
|
|
ret += struct.pack(self.__endian__+sdef, *values)
|
||
|
|
return ret
|
||
|
|
|
||
|
|
def __getitem__(self, value):
|
||
|
|
return [('struct', self.__class__)] * value
|
||
|
|
|
||
|
|
if __name__=='__main__':
|
||
|
|
class TestStruct(Struct):
|
||
|
|
__endian__ = Struct.LE
|
||
|
|
def __format__(self):
|
||
|
|
self.foo, self.bar = Struct.uint32, Struct.float
|
||
|
|
self.baz = Struct.string(8)
|
||
|
|
|
||
|
|
self.omg = Struct.uint32
|
||
|
|
self.wtf = Struct.string(self.omg)
|
||
|
|
|
||
|
|
class HaxStruct(Struct):
|
||
|
|
__endian__ = Struct.LE
|
||
|
|
def __format__(self):
|
||
|
|
self.thing1 = Struct.uint32
|
||
|
|
self.thing2 = Struct.uint32
|
||
|
|
self.hax = HaxStruct
|
||
|
|
|
||
|
|
test = TestStruct()
|
||
|
|
test.unpack('\xEF\xBE\xAD\xDE\x00\x00\x80\x3Fdeadbeef\x04\x00\x00\x00test\xCA\xFE\xBA\xBE\xBE\xBA\xFE\xCA')
|
||
|
|
assert test.foo == 0xDEADBEEF
|
||
|
|
assert test.bar == 1.0
|
||
|
|
assert test.baz == 'deadbeef'
|
||
|
|
assert test.omg == 4
|
||
|
|
assert test.wtf == 'test'
|
||
|
|
assert test.hax.thing1 == 0xBEBAFECA
|
||
|
|
assert test.hax.thing2 == 0xCAFEBABE
|
||
|
|
|
||
|
|
print 'Tests successful'
|
||
|
|
|
||
|
|
"""
|
||
|
|
@Struct.LE
|
||
|
|
def TestStruct():
|
||
|
|
foo, bar = Struct.uint32, Struct.float
|
||
|
|
baz = Struct.string(8)
|
||
|
|
|
||
|
|
omg = Struct.uint32
|
||
|
|
wtf = Struct.string(omg)
|
||
|
|
|
||
|
|
@Struct.LE
|
||
|
|
def HaxStruct():
|
||
|
|
thing1 = Struct.uint32
|
||
|
|
thing2 = Struct.uint32
|
||
|
|
hax = HaxStruct()
|
||
|
|
|
||
|
|
test = TestStruct()
|
||
|
|
test.foo = 0xCAFEBABE
|
||
|
|
test.bar = 0.0
|
||
|
|
thing = test.hax.thing1
|
||
|
|
test.hax.thing1 = test.hax.thing2
|
||
|
|
test.hax.thing2 = thing
|
||
|
|
assert test.pack() == '\xBE\xBA\xFE\xCA\0\0\0\0deadbeef\x04\x00\x00\x00test\xBE\xBA\xFE\xCA\xCA\xFE\xBA\xBE'
|
||
|
|
"""
|