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tiger.py
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131 lines (116 loc) · 3.89 KB
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import array
import struct
from sboxes import t1, t2, t3, t4
def tiger_round(a,b,c,x,mul):
c ^= x
c &= 0xffffffffffffffff
a -= t1[((c) >> (0*8))&0xFF] ^ t2[((c) >> ( 2*8)) & 0xFF] ^ t3[((c) >> (4*8))&0xFF] ^ t4[((c) >> ( 6*8)) & 0xFF]
b += t4[((c) >> (1*8))&0xFF] ^ t3[((c) >> ( 3*8)) & 0xFF] ^ t2[((c) >> (5*8))&0xFF] ^ t1[((c) >> ( 7*8)) & 0xFF]
b *= mul
a &= 0xffffffffffffffff
b &= 0xffffffffffffffff
c &= 0xffffffffffffffff
return {"a": a, "b":b, "c": c}
def tiger_pass(a,b,c,mul, mystr):
values = tiger_round(a,b,c, mystr[0], mul)
values = tiger_round(values["b"], values["c"], values["a"],mystr[1],mul)
values = { "b": values["a"], "c": values["b"], "a": values["c"] }
values = tiger_round(values["c"], values["a"], values["b"], mystr[2], mul)
values = { "c": values["a"], "a": values["b"], "b": values["c"] }
values = tiger_round(values["a"], values["b"], values["c"],mystr[3],mul)
values = tiger_round(values["b"], values["c"], values["a"],mystr[4],mul)
values = { "b": values["a"], "c": values["b"], "a": values["c"] }
values = tiger_round(values["c"], values["a"], values["b"],mystr[5],mul)
values = { "c": values["a"], "a":values["b"], "b": values["c"] }
values = tiger_round(values["a"], values["b"], values["c"],mystr[6],mul)
values = tiger_round(values["b"], values["c"], values["a"],mystr[7],mul)
values = { "b": values["a"], "c":values["b"], "a": values["c"]}
return values
def tiger_compress(str, res):
#setup
a = res[0]
b = res[1]
c = res[2]
x = []
for j in range(0,8):
x.append(struct.unpack('Q', str[j*8:j*8+8])[0])
# compress
aa = a
bb = b
cc = c
allf = 0xFFFFFFFFFFFFFFFF
for i in range(0, 3):
if i != 0:
x[0] = (x[0] - (x[7] ^ 0xA5A5A5A5A5A5A5A5)&allf ) & allf
x[1] ^= x[0]
x[2] = (x[2] + x[1]) & allf
x[3] = (x[3] - (x[2] ^ (~x[1]&allf) << 19)&allf) & allf
x[4] ^= x[3]
x[5] = (x[5] + x[4]) & allf
x[6] = (x[6] - (x[5] ^ (~x[4]&allf) >> 23)&allf) & allf
x[7] ^= x[6]
x[0] = (x[0] + x[7]) & allf
x[1] = (x[1] - (x[0] ^ (~x[7]&allf) << 19)&allf) & allf
x[2] ^= x[1]
x[3] = (x[3] + x[2]) & allf
x[4] = (x[4] - (x[3] ^ (~x[2]&allf) >> 23)&allf) & allf
x[5] ^= x[4]
x[6] = (x[6] + x[5]) & allf
x[7] = (x[7] - (x[6] ^ 0x0123456789ABCDEF)&allf ) & allf
if i == 0:
vals = tiger_pass(a,b,c,5, x)
a = vals['a']
b = vals['b']
c = vals['c']
elif i == 1:
vals = tiger_pass(a,b,c,7, x)
a = vals['a']
b = vals['b']
c = vals['c']
else:
vals = tiger_pass(a,b,c,9, x)
a = vals['a']
b = vals['b']
c = vals['c']
tmpa = a
a = c
c = b
b = tmpa
a ^= aa
b = (b - bb) & allf
c = (c + cc) & allf
# map values out
res[0] = a
res[1] = b
res[2] = c
def hash(str):
i = 0
res = [0x0123456789ABCDEF, 0xFEDCBA9876543210, 0xF096A5B4C3B2E187]
offset = 0
length = len(str)
while i < length-63:
tiger_compress( str[i:i+64], res )
i += 64
temp = array.array('c', str[i:])
j = len(temp)
temp.append(chr(0x01))
j += 1
while j&7 != 0:
temp.append(chr(0))
j += 1
if j > 56:
while j < 64:
temp.append(chr(0))
j += 1
tiger_compress(temp, res)
j = 0
# make the first 56 bytes 0
temp.extend([chr(0) for i in range(0, 56-j)])
while j < 56:
temp[j] = chr(0)
j += 1
while len(temp) > 56:
temp.pop(56)
temp.fromstring(struct.pack('Q', length<<3))
tiger_compress(temp, res)
return "%016X%016X%016X" % (res[0], res[1], res[2])