I am trying to implement a python encription code based on gzip and crypto library but i dont know the equivalent modules or functions in either php or node js
from Crypto.Cipher import DES, AES
def enclen(p):
return ((16 - p % 16) & 0xF) + p + 4
def rsb(a, b):
return (0 - a + b) & 0xffffffff
def ands(a, b):
return (a & b) & 0xffffffff
def _ror(val, bits, bit_size):
return ((val & (2 ** bit_size - 1)) >> bits % bit_size) | \
(val << (bit_size - (bits % bit_size)) & (2 ** bit_size - 1))
def __ROR4__(a, b):
return _ror(a, b, 32)
def eor(a, b):
return (a ^ b) & 0xffffffff
class Crypto(object):
def __init__(self):
self.key = b'!*ss!_defaul%t54'
self.kl = 0x10
self.sbox0 = bytes.fromhex(
'637C777BF26B6FC53001672BFED7AB76CA82C97DFA5947F0ADD4A2AF9CA472'
'C0B7FD9326363FF7CC34A5E5F171D8311504C723C31896059A071280E2EB27'
'B27509832C1A1B6E5AA0523BD6B329E32F8453D100ED20FCB15B6ACBBE394A'
'4C58CFD0EFAAFB434D338545F9027F503C9FA851A3408F929D38F5BCB6DA21'
'10FFF3D2CD0C13EC5F974417C4A77E3D645D197360814FDC222A908846EEB8'
'14DE5E0BDBE0323A0A4906245CC2D3AC629195E479E7C8376D8DD54EA96C56'
'F4EA657AAE08BA78252E1CA6B4C6E8DD741F4BBD8B8A703EB5664803F60E61'
'3557B986C11D9EE1F8981169D98E949B1E87E9CE5528DF8CA1890DBFE64268'
'41992D0FB054BB16')
self.plen = 0
def crypt(self, payload):
if not isinstance(payload, bytes):
payload = payload.encode('utf8')
self.plen = len(payload)
i = 0
r = [00] * 16
while i < self.kl:
a = self.key[i]
r[i] = self.sbox0[a]
i += 1
t = int.from_bytes(r[:4], 'big')
r[:4] = int.to_bytes(t, 4, 'little')
t = int.from_bytes(r[4:8], 'big')
r[4:8] = int.to_bytes(t, 4, 'little')
t = int.from_bytes(r[8:12], 'big')
r[8:12] = int.to_bytes(t, 4, 'little')
t = int.from_bytes(r[12:16], 'big')
r[12:16] = int.to_bytes(t, 4, 'little')
b = rsb(self.plen, 0)
b = ands(b, 0xf)
c = b + self.plen + 4
result = [00] * enclen(self.plen)
result[0] = 0x74
result[1] = 0x63
result[2] = 0x02
result[3] = b
result[4:len(payload) + 4] = payload
i = 4
while i != c:
a = result[i]
result[i] = self.sbox0[a]
i += 1
a = c - 4
b = 0
a = a >> 4
d = 4
while b < a:
c = int.from_bytes(result[d:d + 4], 'big')
e = int.from_bytes(r[:4], 'little')
c ^= e
result[d:d + 4] = int.to_bytes(c, 4, 'big')
c = int.from_bytes(result[d + 4:d + 8], 'big')
e = int.from_bytes(r[4:8], 'little')
c = eor(e, __ROR4__(c, 24))
result[d + 4:d + 8] = int.to_bytes(c, 4, 'big')
c = int.from_bytes(result[d + 8:d + 12], 'big')
e = int.from_bytes(r[8:12], 'little')
c = eor(e, __ROR4__(c, 16))
result[d + 8:d + 12] = int.to_bytes(c, 4, 'big')
c = int.from_bytes(result[d + 12:d + 16], 'big')
e = int.from_bytes(r[12:16], 'little')
c = eor(e, __ROR4__(c, 8))
result[d + 12:d + 16] = int.to_bytes(c, 4, 'big')
b += 1
d += 0x10
return bytes(result)
I dont have much idea what really goes behind this code some byte size operations but i dont know what exactly happens
Either nodejs or php equivalent of this code or any idea to how to implement it in those lang or if those languages are supported this kind of operations I dont know
