initial commit

CTF/CryptoSystem/file.py

@@ -0,0 +1,15 @@
+from Crypto.Util.number import *
+from flag import FLAG
+
+def primo(n):
+    n += 2 if n & 1 else 1
+    while not isPrime(n):
+        n += 2
+    return n
+
+p = getPrime(1024)
+q = primo(p)
+n = p * q
+e = 0x10001
+d = inverse(e, (p-1) * (q-1))
+c = pow(bytes_to_long(FLAG.encode()), e, n)