#!/usr/bin/env python
# chal21.py - Implement MT19937
#
# Copyright (C) 2015 Andrew J. Zimolzak <*****@*****.**>,
# and licensed under GNU GPL version 3. Full notice is found in
# the file 'LICENSE' in the same directory as this file.
from cryptopals import warn
from myrand import MTRNG
r = MTRNG(12436)
print r.extract_number()
print r.extract_number()
print r.extract_number()
print r.extract_number()
print r.extract_number()
print r.extract_number()
print r.extract_number()
print r.extract_number()
#### tests, if any ####
warn("No errors:", __file__)
# chal22.py - MT19937 seed
#
# Copyright (C) 2015 Andrew J. Zimolzak <*****@*****.**>,
# and licensed under GNU GPL version 3. Full notice is found in
# the file 'LICENSE' in the same directory as this file.
from cryptopals import warn
from myrand import MTRNG, find_time_seed
import time
import random
#### Generate a number from RNG seeded with time
time.sleep(random.randint(7, 15)) # 40,1000 is more fun though
r = MTRNG(int(time.time()))
time.sleep(random.randint(7, 15))
target_num = r.extract_number()
#### Reverse engineer the seed
print "Received target of:", target_num
found_seed = find_time_seed(target_num, int(time.time()))
print "Seed used was:", found_seed
print "In other words,", time.ctime(found_seed)
#### tests, if any ####
assert (found_seed > 1441224144)
warn("Passed assertions:", __file__)
output = input ^ ((output << k) & mask)
bits += k
return output
def untemper(y4):
y3 = untemper_partial(y4, l, "right")
y2 = untemper_partial(y3, t, c)
y1 = untemper_partial(y2, s, b)
return untemper_partial(y1, u, "right")
answer = untemper(0xe016575d)
print "Untemper result is:", hex(answer)
rng = MTRNG(67812)
state = [0] * n
for i in range(n):
state[i] = untemper(rng.extract_number())
clone = MTRNG(state)
print "Cloning results are:"
for i in range(10):
x = clone.extract_number()
y = rng.extract_number()
print x, y
assert x == y
#### tests, if any ####
# chal22.py - MT19937 seed
#
# Copyright (C) 2015 Andrew J. Zimolzak <*****@*****.**>,
# and licensed under GNU GPL version 3. Full notice is found in
# the file 'LICENSE' in the same directory as this file.
from cryptopals import warn
from myrand import MTRNG, find_time_seed
import time
import random
#### Generate a number from RNG seeded with time
time.sleep(random.randint(7,15)) # 40,1000 is more fun though
r = MTRNG(int(time.time()))
time.sleep(random.randint(7,15))
target_num = r.extract_number()
#### Reverse engineer the seed
print "Received target of:", target_num
found_seed = find_time_seed(target_num, int(time.time()))
print "Seed used was:", found_seed
print "In other words,", time.ctime(found_seed)
#### tests, if any ####
assert(found_seed > 1441224144)
warn("Passed assertions:", __file__)
#!/usr/bin/env python
# chal21.py - Implement MT19937
#
# Copyright (C) 2015 Andrew J. Zimolzak <*****@*****.**>,
# and licensed under GNU GPL version 3. Full notice is found in
# the file 'LICENSE' in the same directory as this file.
from cryptopals import warn
from myrand import MTRNG
r = MTRNG(12436)
print r.extract_number()
print r.extract_number()
print r.extract_number()
print r.extract_number()
print r.extract_number()
print r.extract_number()
print r.extract_number()
print r.extract_number()
#### tests, if any ####
warn("No errors:", __file__)
output = input ^ (output >> k)
else:
output = input ^ ((output << k) & mask)
bits += k
return output
def untemper(y4):
y3 = untemper_partial(y4, l, "right")
y2 = untemper_partial(y3, t, c)
y1 = untemper_partial(y2, s, b)
return untemper_partial(y1, u, "right")
answer = untemper(0xe016575d)
print "Untemper result is:", hex(answer)
rng = MTRNG(67812)
state = [0] * n
for i in range(n):
state[i] = untemper(rng.extract_number())
clone = MTRNG(state)
print "Cloning results are:"
for i in range(10):
x = clone.extract_number()
y = rng.extract_number()
print x, y
assert x == y
#### tests, if any ####
