CTF toolkit: lib (net, crypto_utils), templates per category, scaffold, cheatsheet, ps_and_qs example

templates/crypto_skeleton.py

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+"""
+CRYPTO skeleton — copy & fill. (p4-team style: read source, do the math)
+
+For RSA challenges, start by importing lib.crypto_utils and try the recipes:
+  recover_n_from_keys, common_modulus_attack, wiener, hastad_broadcast
+"""
+import lib.crypto_utils as cu
+from Crypto.Util.number import long_to_bytes, bytes_to_long, getPrime, inverse
+
+
+def main():
+    # 1) Read the challenge output / source. Example: RSA with weird params.
+    e = 0x10001
+    # ... load n, c, etc from the provided data ...
+
+    # 2) Try the right recipe. Example (from 'lost_modulus'):
+    # p, q = cu.recover_n_from_keys(e, d, ipmq, iqmp)
+    # n = p * q
+    # m = pow(c, d, n)
+    # print(long_to_bytes(m))
+
+    raise NotImplementedError("fill in the crypto math")
+
+
+if __name__ == "__main__":
+    main()