init htb

old htb folders

HTB/challenges/crypto/BabyEncryption/ape.py

@@ -0,0 +1,27 @@
+import string
+
+
+def encryption(msg):
+    ct = []
+    for char in msg:
+        ct.append((123 * ord(char) + 18) % 256)
+    return bytes(ct)
+
+dict = {}
+
+for elem in string.printable:
+    enc = encryption(elem)[0]
+    dict[elem] = enc
+    dict[enc] = elem
+
+print(dict)
+
+f = open('./msg.enc','r')
+ct = f.readline()
+ct = [int(ct[i:i+2],16) for i in range(0, len(ct), 2)]
+
+solve = ""
+for elem in ct:
+    solve += dict[elem]
+
+print(solve)