def do_round(self, v, k):
nv = 0
op = self.op_params[k]
for i in range(0x20):
b = v >> op.perm[i] & 1
nv = nv | (b << i)
nv = nv ^ op.xorv
nv = rotlu32(nv, op.shiftv)
nv = modu32(nv + op.addv)
return nv
def itsf(self, vals):
res = []
for i in range(len(vals)):
v = vals[i]
for j in range(0x80):
v = self.do_iround(v, i)
v = modu32(v - self.op_params[i].add0)
res.append(v)
res[0] ^= res[2]
res[1] ^= res[3]
return res
def tsf(self, vals, nr=0x80):
vals[0] ^= vals[2]
vals[1] ^= vals[3]
res = []
for i in range(len(vals)):
v = vals[i]
v = modu32(v + self.op_params[i].add0)
for j in range(nr):
v = self.do_round(v, i)
res.append(v)
return res
def do_iround(self, v, k):
op = self.op_params[k]
v = modu32(v - op.addv)
v = rotlu32(v, -op.shiftv)
v = v ^ op.xorv
nv = 0
for i in range(0x20):
b = v >> i & 1
nv = nv | (b << op.perm[i])
return nv
def find_s3(self, tb):
need = modu32(-rotlu32(W1_CMP, -0x11) + (0xb00bface ^ tb[0] ^ tb[1]))
need = need ^ 0xdeadbeef ^ tb[2]
return need
def checksum(self, tb):
v = (0xb00bface ^ tb[0] ^ tb[1]) - (0xdeadbeef ^ tb[2] ^ tb[3])
v = rotlu32(modu32(v), 0x11)
return v