def generatePadding(self, offset, count):
"""
Generates padding to be inserted into the ROP stack.
>>> rop = ROP([])
>>> val = rop.generatePadding(5,15)
>>> cyclic_find(val[:4])
5
>>> len(val)
15
>>> rop.generatePadding(0,0)
b''
"""
# Ensure we don't generate a cyclic pattern which contains badchars
alphabet = b''.join(packing.p8(c) for c in bytearray(string.ascii_lowercase.encode()) if c not in self._badchars)
if count:
return cyclic(offset + count, alphabet=alphabet)[-count:]
return b''
def p8(self, *a, **kw):
return self.send(packing.p8(*a, **kw))
def p8(self, address, data, *a, **kw): return self.write(address, packing.p8(data, *a, **kw)) def pack(self, address, data, *a, **kw): return self.write(address, packing.pack(data, *a, **kw))
def p8(self, address, data, *a, **kw):
"""Writes a 8-bit integer ``data`` to the specified ``address``"""
return self.write(address, packing.p8(data, *a, **kw))
