def compute(self, message):
self.ihvs = list(self.IVs)
message += self.pad(message)
block_bytes = [0 for i in xrange(16)]
blocks = as_bytes_blocks(message, 16)
for block in blocks:
xor = bytes([0 for i in xrange(16)])
block_bytes = [ord(i) for i in block]
for i in xrange(16):
xor[i] = self.ihvs[i] ^ block_bytes[i]
previous = Byte(0)
for round_ in xrange(18):
for l in [self.ihvs, block_bytes, xor]:
for k in xrange(16):
previous = l[k] = l[k] ^ Md2_u.pi_subst[previous]
previous = previous + round_
return self
def compute(self, message):
self.ihvs = list(self.IVs)
message += self.pad(message)
block_bytes = [0 for i in xrange(16)]
blocks = as_bytes_blocks(message, 16)
for block in blocks:
xor = bytes([0 for i in xrange(16)])
block_bytes = [ord(i) for i in block]
for i in xrange(16):
xor[i] = self.ihvs[i] ^ block_bytes[i]
previous = Byte(0)
for round_ in xrange(18):
for l in [self.ihvs, block_bytes, xor]:
for k in xrange(16):
previous = l[k] = l[k] ^ Md2_u.pi_subst[previous]
previous = previous + round_
return self
def __init__(self):
Merkledamgaard.__init__(self)
self.block_length = 16
self.hv_size = 8
self.IVs = bytes([0 for i in xrange(16)])
def __init__(self):
Merkledamgaard.__init__(self)
self.block_length = 16
self.hv_size = 8
self.IVs = bytes([0 for i in xrange(16)])