ALL the CTFS of Crypto2025 finally

crypto-asimmetric/inferious_prime/attack.py

@@ -0,0 +1,16 @@
+import ContinuedFractions, Arithmetic
+from Cryptodome.Util.number import getPrime, inverse, bytes_to_long, long_to_bytes, GCD
+
+#flag len == 23
+n = 770071954467068028952709005868206184906970777429465364126693
+e = 3
+# ct = pow(pt, e, n)
+ct = 388435672474892257936058543724812684332943095105091384265939
+p =  888242373638787482012535770369
+q = 866961515596671343895614356197
+phi = (p - 1)*(q - 1)
+d = inverse(e, phi)
+#res = egcd(e, phi)
+pt = pow(ct,d,n)
+decrypted = long_to_bytes(pt)
+print(decrypted.decode())