/payload_generator.py Secret
Created
December 4, 2015 14:11
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import struct | |
class PayloadGenerator: | |
def __init__(self, payload): | |
self.payload = payload | |
def get_length(self, payload): | |
return sum(map(lambda x: len(x), self.payload)) | |
def generate(self, base=0): | |
data = dict() | |
payload = list(self.payload) | |
raw_length = self.get_length(payload) | |
append_length = 0 | |
i = 0 | |
while i < len(payload): | |
item = payload[i] | |
if isinstance(item, str): | |
pass | |
elif isinstance(item.value, list): | |
tup = tuple(item.value) | |
if tuple(item.value) not in data: | |
payload += tup | |
data[tup] = item.pack(base + raw_length + append_length) | |
append_length += self.get_length(tup) | |
payload[i] = data[tup] | |
elif isinstance(item.value, str): | |
if item.value not in data: | |
payload.append(item.value) | |
data[item.value] = item.pack(base + raw_length + append_length) | |
append_length += len(item.value) | |
payload[i] = data[item.value] | |
else: | |
raise TypeError | |
i += 1 | |
return ''.join(payload) | |
class Ptr32: | |
def __init__(self, val): | |
if not (isinstance(val, str) | |
or isinstance(val, Ptr32) | |
or isinstance(val, list)): | |
raise TypeError | |
self.value = val | |
def pack(self, addr): | |
return struct.pack('<I', addr) | |
def __len__(self): | |
return 4 | |
class Ptr64: | |
def __init__(self, val): | |
if not (isinstance(val, str) | |
or isinstance(val, Ptr64) | |
or isinstance(val, list)): | |
raise TypeError | |
self.value = val | |
def pack(self, addr): | |
return struct.pack('<Q', addr) | |
def __len__(self): | |
return 8 |
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