preimage attack progress
This commit is contained in:
parent
188b077090
commit
cd55bd1021
|
@ -66,9 +66,7 @@ def test_against_hash(input: bytearray, target_hash: bytearray) -> bool:
|
|||
|
||||
def first_preimage():
|
||||
print("Trying to find a message that produces %s" % THE_HASH.hex())
|
||||
# a xor b = c
|
||||
# c xor b = a
|
||||
target = bytearray(b'\ff' * 16)
|
||||
target = bytearray(b'\00' * 16)
|
||||
input = bytearray(b'\00' * 16)
|
||||
between = bytearray(16)
|
||||
# this is an arbituary target
|
||||
|
@ -76,8 +74,12 @@ def first_preimage():
|
|||
target[0] = ord('A')
|
||||
|
||||
for i in range(0, 16):
|
||||
between[i] = target[i] ^ THE_HASH[i]
|
||||
|
||||
between[i] = target[i] ^ DEFINED_INITIAL[i]
|
||||
print("%d:\tbtw %s\ttar %s\thash %s" % (i, between.hex(), target.hex(), THE_HASH.hex()))
|
||||
input[i] = between[i] ^ THE_HASH[i]
|
||||
print("%d:\tbtw %s\ttar %s\thash %s" % (i, between.hex(), target.hex(), THE_HASH.hex()))
|
||||
assert THE_HASH[i] == input[i] ^ target[i], "xor circle is broken"
|
||||
|
||||
print(test_against_hash(input, THE_HASH))
|
||||
|
||||
|
|
Loading…
Reference in New Issue