Update 'hash.py'

hash.py

@@ -1 +1,69 @@
-#Nothing here yet...
+import math
+
+flag = "what_the_flag??!"
+
+comment = "#input_string must only contain ascii characters"
+comment2 = "#is the length of input_string important?"
+def hash(input_string):
+
+    sl = eval(comment2[8:11] + "(" + comment[1:7] + comment2[24:31] +  ")")
+
+    #max 32 chars
+    if sl > 2**5:
+        input_string = input_string[:32]
+        sl = 64 - (2**4 + 16)
+
+
+    #Padding
+    if sl != 32:
+        l = 32 - sl
+        input_string = input_string + comment2[:l]
+
+    sl = len(input_string)
+
+
+    h665 = input_string[int(sl / 2) : sl]
+
+    sta = [] #How far should each char be shifted
+    for char in h665:
+        sta.append(ord(char))
+
+    h664 = input_string[:int((sl / 2))]
+
+    a = True
+    while a:
+        for i in range(int(sl / 2)):
+            h664 = (h664[:i] +
+                    f2(h664[i], sta[i]) +
+                    h664[i + 1:])
+            for y in range(int(sl)):
+                a = f3(input_string[i], y)
+                        
+
+    i = 0
+    input_string = ""
+    while i < sl / 2:
+        input_string += h664[i]
+        input_string += h665[i]
+        i = i+1
+
+
+    return input_string.replace(" ", "_")
+
+def f2(v1, v2):
+    v3 = (ord(v1) + v2) %126
+    it = 0
+    while (v3 < 32 or v3 > 126):
+        v3 = (v3 + ord(v1) + v2 + it) % 126
+        it = it + 1
+    return chr(v3)
+
+def f3(v2, v1):
+    v3 = (ord(v2) + v1) %126
+    for i in range(v1):
+        v3 = (v3 + ord(v2) + v1 + i) % 126
+    return v3 == -1
+
+
+flag_hash = hash(flag)
+print("{" ,flag_hash, "}")