Delete services/phew directory

services/phew/chall.py

@@ -1,126 +0,0 @@
-#!/usr/bin/env python3
-
-import os, sys, json, random, hashlib, hmac
-from Crypto.Cipher import AES
-from Crypto.Util.Padding import pad
-with open("/flag.txt", "rb") as f:
-    flag = f.read()
-
-menu = (
-    "1) encrypt\n"
-    "2) profit\n"
-    "3) nyerah\n"
-    ">> "
-)
-
-
-k = 1024  
-n = 169
-
-rng = random.SystemRandom()
-
-def rand(k_bits: int) -> int:
-    return rng.randrange(1, 1 << k_bits)
-
-def gen(n: int, k_bits: int):
-    a = [rand(k_bits) for _ in range(n)]
-    return a
-
-def b2b(b: bytes) -> list[int]:
-    out = []
-    for byte in b:
-        for i in range(8):
-            out.append((byte >> i) & 1)
-    return out
-
-def pack(bits) -> bytes:
-    out = bytearray()
-    for i in range(0, len(bits), 8):
-        chunk = bits[i:i+8]
-        val = 0
-        for j, bit in enumerate(chunk):
-            val |= (bit & 1) << j
-        out.append(val)
-    return bytes(out)
-
-def gen_key(x_bits: list[int], saltx: bytes, salty: bytes, length: int = 16) -> bytes:
-    material = pack(x_bits)
-    prk = hashlib.pbkdf2_hmac("sha256", material, saltx, 131072, dklen=32)
-    return hmac.new(prk, b"afk-players-wanted-now" + salty + b"\x01", hashlib.sha256).digest()[:length]
-
-def enc(k: bytes, data: bytes):
-    iv = os.urandom(16)
-    ct = AES.new(k, AES.MODE_CBC, iv).encrypt(pad(data, 16))
-    return iv, ct
-
-def add(a, x_bits) -> int:
-    return sum(ai for ai, xi in zip(a, x_bits) if xi)
-
-def main():
-    a = gen(n, k)
-    x_bits = b2b(flag)
-    if len(x_bits) < n:
-        x_bits += [rng.randrange(0, 2) for _ in range(n - len(x_bits))]
-    else:
-        x_bits = x_bits[:n]
-
-    s = add(a, x_bits)
-
-    saltx = os.urandom(16)
-    salty = os.urandom(16)
-    key = gen_key(x_bits, saltx, salty)
-
-    iv, ct = enc(key, flag)
-
-    header = {
-        "n": n,
-        "k_bits": k,
-    }
-    print(json.dumps(header, separators=(",", ":")), flush=True)
-
-    while True:
-        try:
-            print(menu, end="", flush=True)
-            line = sys.stdin.readline()
-            if not line:
-                break
-            try:
-                choice = int(line.strip())
-            except ValueError:
-                print("sheesh")
-                continue
-
-            if choice == 1:
-                print("data: ", end="", flush=True)
-                dline = sys.stdin.readline()
-                if not dline:
-                    break
-                try:
-                    data = bytes.fromhex(dline.strip())
-                except Exception:
-                    print("hmmm")
-                    continue
-                iv, ct = enc(key, data)
-                print(iv.hex())
-                print(ct.hex())
-
-            elif choice == 2:
-                print(json.dumps({"a": a}, separators=(",", ":")))
-                print(str(s))
-                print(saltx.hex())
-                print(salty.hex())
-                print(iv.hex())
-                print(ct.hex())
-
-            elif choice == 3:
-                print("bubay")
-                return
-
-            else:
-                print("tidak ada yang mustahil, hehehe")
-
-        except Exception:
-            print("zzz")
-
-if __name__ == "__main__":
-    main()