chore: making progress

README.md

@@ -1,6 +1,6 @@
 # pyzule-rw / cyan
 
-rewriting [pyzule](https://github.com/asdfzxcvbn/pyzule), but actually good this time!
+rewriting [pyzule](https://github.com/asdfzxcvbn/pyzule), but actually good this time! btw.. cyan/pyzule looks best with a monospace font !! :D
 
 this is pretty much just a hobby project that i'll work on when i'm bored. pyzule in its current state is kinda ugly, but it works and i haven't really had the motivation to work on it. there really isn't any need for improvements, anyway..
 

extras/CydiaSubstrate.framework/Info.plist

@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>CFBundleExecutable</key>
+	<string>CydiaSubstrate</string>
+
+	<key>CFBundleIdentifier</key>
+	<string>ellekit</string>
+
+	<key>CFBundleName</key>
+	<string>ElleKit</string>
+
+	<key>CFBundleShortVersionString</key>
+	<string>1.1.3</string>
+
+	<key>CFBundleVersion</key>
+	<string>1.1.3</string>
+
+	<key>UIRequiredDeviceCapabilities</key>
+	<array>
+		<string>arm64</string>
+	</array>
+</dict>
+</plist>

extras/CydiaSubstrate.framework/LICENSE

@@ -0,0 +1,27 @@
+Copyright (c) 2022 Évelyne Bélanger All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+   * Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+   * Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the following disclaimer
+in the documentation and/or other materials provided with the
+distribution.
+   * Neither ElleKit nor the names of its
+contributors may be used to endorse or promote products derived from
+this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

src/__main__.py

@@ -1,12 +1,18 @@
 #!/usr/bin/env python3
 # cyan, aka pyzule-rw; by zx, 2024
 
+import sys
 import argparse
 
 import cyan
 
 
 def main() -> None:
+  if sys.version_info < (3, 12):
+    sys.exit("[!] please upgrade to python 3.12 or higher")
+  elif sys.platform == "win32":
+    sys.exit("[!] windows is not supported")
+
   parser = argparse.ArgumentParser(
     description="cyan, an azule \"clone\" for modifying iOS apps"
   )
@@ -29,21 +35,14 @@ def main() -> None:
     "--overwrite", action="store_true",
     help="skip overwrite confirmation"
   )
+  parser.add_argument(
+    "--ignore-encrypted", action="store_true",
+    help="skip main binary encryption check"
+  )
 
   cyan.main(parser)
 
+
 if __name__ == "__main__":
   main()
 
-# INPUT = os.path.realpath(args.input)
-# WORKING_DIR = os.getcwd()
-# PZ_DIR = os.path.expanduser("~/.config/cyan")
-# changed = False
-
-# if not (INPUT.endswith(".ipa") or INPUT.endswith(".app")):
-#     sys.exit("[!] input must be a .ipa/.app")
-# elif not os.path.exists(INPUT):
-#     sys.exit("[!] input does not exist")
-# elif not args.o and (input("[<] override your input file? [y/N] ").strip()
-#                      .lower() not in ("y", "yes")):
-#     sys.exit("[!] not overriding input, missing -o")

src/cyan.py

@@ -1,7 +1,10 @@
 import os
+import sys
 from argparse import ArgumentParser
+from tempfile import TemporaryDirectory
 
 import tbhutils
+import tbhtypes
 
 
 def main(parser: ArgumentParser) -> None:
@@ -20,6 +23,16 @@ def main(parser: ArgumentParser) -> None:
   if arg_err is not None:
     parser.error(arg_err)
 
-  # verbose notices
+  INPUT_IS_IPA = True if args.i.endswith(".ipa") else False
-  if args.o
+  # OUTPUT_IS_IPA = True if args.o.endswith(".ipa") else False
+
+  with TemporaryDirectory() as tmpdir:
+    app_path, plist_path = tbhutils.get_app(args.i, tmpdir, INPUT_IS_IPA)
+    app = tbhtypes.AppBundle(app_path, plist_path)
+
+    if app.executable.is_encrypted():
+      if args.ignore_encrypted:
+        print("[?] main binary is encrypted, ignoring")
+      else:
+        sys.exit("[!] main binary is encrypted; exiting")
 

src/tbhtypes.py

@@ -0,0 +1,31 @@
+import os
+import sys
+from subprocess import run
+
+import tbhutils
+
+
+class AppBundle:
+  def __init__(self, path: str, plist_path: str):
+    self.path = path
+    self.plist = tbhutils.get_plist(plist_path)
+    self.executable = Executable(
+      f"{path}/{self.plist["CFBundleExecutable"]}"
+    )
+
+
+class Executable:
+  td = tbhutils.get_tools_dir()
+  otool = f"{td}/otool"
+
+  def __init__(self, path: str):
+    if not os.path.isfile(path):
+      sys.exit(f"[!] {path} does not exist (executable)")
+
+    self.path = path
+
+  def is_encrypted(self) -> bool:
+    proc = run([self.otool, "-l", self.path])
+    return b"cryptid 1" in proc.stdout
+
+

src/tbhutils.py

@@ -1,6 +1,12 @@
 import os
-from typing import Optional
+import sys
+import shutil
+import zipfile
+import platform
+import plistlib
+from glob import glob
 from argparse import Namespace
+from typing import Optional, Any
 
 
 def validate_inputs(args: Namespace) -> Optional[str]:
@@ -13,5 +19,85 @@ def validate_inputs(args: Namespace) -> Optional[str]:
   if not os.path.exists(args.i):
     return f"{args.i} does not exist"
 
+  if os.path.exists(args.o):
+    if args.overwrite:
+      return print("[*] output already exists; will overwrite !")
+
+    try:
+      overwrite = input(
+        f"[<] {args.o} already exists, overwrite it? [Y/n] "
+        if args.output is not None
+        else "[<] no output was specified. overwrite the input? [Y/n] "
+      ).strip().lower()
+    except KeyboardInterrupt:
+      sys.exit("[>] bye!")
+
+    if overwrite not in ("y", "yes", ""):
+      print("[>] quitting.")
+      sys.exit(0)
+
+  if args.f is not None:
+    args.f = {os.path.normpath(f) for f in args.f}
+    nonexistent = [f for f in args.f if not os.path.exists(f)]
+
+    if len(nonexistent) != 0:
+      print("[!] please ensure the following file(s) exist:")
+      for ne in nonexistent:
+        print(f"[?] - {ne}")
+      sys.exit(1)
 
 
+def get_app(path: str, tmpdir: str, is_ipa: bool) -> tuple[str, str]:
+  payload = f"{tmpdir}/Payload"
+
+  if is_ipa:
+    print("[*] extracting ipa..")
+
+    try:
+      with zipfile.ZipFile(path) as ipa:
+        names = ipa.namelist()
+
+        if not any(name.startswith("Payload/") for name in names):
+          raise KeyError
+        elif not any(name.endswith(".app/Info.plist") for name in names):
+          sys.exit("[!] no Info.plist, invalid app")
+
+        ipa.extractall(tmpdir)
+        app = glob(f"{payload}/*.app")[0]
+        plist = f"{app}/Info.plist"
+    except (KeyError, IndexError):
+      sys.exit("[!] couldn't find either Payload or app folder, invalid ipa")
+    except zipfile.BadZipFile:
+      sys.exit(f"[!] {path} is not a zipfile (ipa)")
+
+    print("[*] extracted ipa")
+  else:
+    if not os.path.isfile((plist := f"{path}/Info.plist")):
+      sys.exit("[!] no Info.plist, invalid app")
+
+    print("[*] copying app..")
+    shutil.copytree(path, (app := f"{payload}/{os.path.basename(path)}"))
+    print("[*] copied app")
+
+  return app, plist
+
+
+def get_tools_dir() -> str:
+  mach = platform.machine()
+  system = platform.system()
+  prefix = ""
+
+  if "iPhone" in mach or "iPad" in mach:
+    mach = "arm64"
+    prefix = "/var/jb"  # sorry, rootless only !!
+
+  return f"{prefix}/opt/cyan/tools/{system}/{mach}"
+
+
+def get_plist(path: str) -> dict[str, Any]:
+  try:
+    with open(path, "rb") as f:
+      return plistlib.load(f)
+  except Exception:
+    sys.exit(f"[!] couldn't read {path}")
+