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autotss

Automatically save shsh2 blobs for signed iOS firmwares using tsschecker and the IPSW.me API

Motivation

tsschecker is not only meant to be used to check signing status, but also to explore Apple's tss servers. By using all of its customization possibilities, you might discover a combination of devices and iOS versions that is now getting signed but wasn't getting signed before. -tihmstar (author of tsschecker)

@leftyfl1p and I were curious to see if Apple ever accidentally signs firmwares that should no longer be signed (they do). While tsschecker is great for this, a tool to automate the process did not yet exist.

Usage

  1. Place your device info in devices.ini
    • Find your device identifier
    • Find your device ECID (both hex and dec are accepted)
    • Determine if your iOS device requires a board config. iOS devices with multiple available board configs will require you to manually specify a board config. Check this list to see if your device is applicable.
    • Put this information in devices.ini in the appropriate format (see below for formatting)
  2. Unzip the latest tsschecker release, and place the unzipped folder in the same directory as autotss.py
    • Once the unzipped tsschecker folder is in the same directory as autotss.py, the binary for your operating system will be automatically selected
    • Or you can manually provide a path to your tsschecker binary:
      • autotss('/Users/codsane/tsschecker/tsschecker_macos')
      • python3 autotss.py -p /Users/codsane/tsschecker/tsschecker_macos
  3. Run python3 autotss.py
  4. (Optional) Schedule autotss to run frequently to save blobs for firmwares as they are signed

Config File

Your devices.ini file should follow the format below. Specifying a board config is optional but may be required for your device model.

[Device Name]
identifier = iPhone9,4
ecid = 1438617935153

Example:

[codsane's iPhone SE]
identifier = iPhone8,4
ecid = A1032047B013A
boardconfig = n69uap

Known Issues

  • iOS 11.2 Build 15C113

    • This specific iOS 11.2 build doesn't like to work with tsschecker for some reason. tsschecker works fine with iOS 11.2 Build 15C114 so that build can be used instead.

  • Outdated version of tsschecker at tsschecker's repo

Requirements

To Do

  • Add support for Beta/OTA firmwares