some small fixes

Cryptography/sha/sha-256-bruteforce_remove_123456789x.py

@@ -0,0 +1,24 @@
+'''
+from asis 2013
+'''
+
+from itertools import permutations
+from hashlib import sha256
+
+def test(s):
+  e = '9f2a579716af14400c9ba1de8682ca52c17b3ed4235ea17ac12ae78ca24876ef'
+  return sha256('ASIS_' + s).hexdigest() == e
+
+m = '3c6a1c371b381c943065864b95ae5546'
+s = '12456789x'
+for p in permutations(s):
+    def f(sub, c):
+        if c in sub:
+            return sub[c]
+        else:
+            return c
+    sub = {c : d for c, d in zip(s, p)}
+    z = ''.join(f(sub, c) for c in m)
+    if test(z):
+        print z
+        break