Init. Commit

qualifiers/cratewatch-native-rust-reverse-hard/solve/solve.py

@@ -0,0 +1,20 @@
+#!/usr/bin/env python3
+from pathlib import Path
+import argparse, base64, hashlib, json, lzma, marshal, os, plistlib, re, struct, subprocess, sys, zipfile, zlib
+
+def xor(data, key):
+    return bytes(b ^ key[i % len(key)] for i, b in enumerate(data))
+
+def find_after(data, marker):
+    off = data.index(marker) + len(marker)
+    ln = struct.unpack_from('<I', data, off)[0]
+    off += 4
+    return data[off:off+ln]
+
+def main():
+    ap=argparse.ArgumentParser(); ap.add_argument('bin', nargs='?', default='../public/cratewatch'); args=ap.parse_args()
+    data=Path(args.bin).read_bytes(); off=data.index(b'CRATEWATCHCFG')+13
+    ln=struct.unpack_from('<I', data, off)[0]; off += 4
+    cfg=json.loads(xor(data[off:off+ln], b'cratewatch-fastlog'))
+    print(cfg['flag'])
+if __name__=='__main__': main()