README.md

tsschecker

A Powerful tool to check TSS signing status on combinations of various apple devices and firmware versions.

Features

• Supports: Apple TV, Apple Watch, HomePod, iPad, iPhone, iPod touch, M1 Macs and the T2 Coprocessor.
• Allows you to get lists of supported apple devices as well as Firmwares and OTA versions for any specified apple device.
• Can check signing status for any firmware version by specifying either a firmware version or a BuildManifest.
• Works without specifying any device relevant values to check signing status, but can be used to save blobs when given an ECID and the option --print-tss-response (although there are better tools to do this).

tsschecker is not only meant to be used to check firmware 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 firmware versions that is getting signed but wasn't getting signed before.

About Nonces:

A Nonce ("Number-used-ONCE") is a randomly generated value that is used to randomize apple's signed hash blobs.

it is created by the device with a nonce seed (generator) and then hashes that seed to create the nonce.
On arm64e devices the nonce is also encrypted with the device's UID Key, see "Nonce Entangling" for more details.

Recommended nonce-seeds (Generators) for saving tickets:

• 0xbd34a880be0b53f3 // default on the Electra, Chimera and Odyssey jailbreak apps.
• 0x1111111111111111 // default on the unc0ver jailbreak app.

Nonce Entangling (arm64e devices)

arm64e devices such as the iPhone XR, Apple Watch Series 4 and all newer devices have nonce-entangling.

Nonce Entangling works by further randomizing the boot nonce by encrypting it with the device's unique ID key,
making the nonce created from the generator specific to that device only.

To save tickets for an arm64e device, you must get the boot nonce that the device creates from your generator,
the simpliest way to get a nonce/generator pair is to use airsquared's blobsaver tool and read them from the device. you can also use cryptiiic's aes_nonce python script to read the nonce/generator pair from the device as well.

Nonce Collisions:

the Nonce Collision method only works on a few firmwares and devices, and is not reliable and not recommended.
it's a lot better to save a ticket with a generator and use the checkm8 bootrom exploit or a nonce setter.

Recovery Nonce Collisions only occur on a few iOS versions, like iOS 9.3.3 and iOS 10.1-10.2 on the iPhone 5s
and is not reliable as once you update, your device will almost-certainly not collide nonces anymore.

DFU Nonce Collisions on the other hand, very commonly occur on any device using A7 and A8 chipsets regardless of iOS version and is MUCH more reliable than using recovery collisions.

Build

Install or Compile dependencies

• Buildsystem:

  • autoconf
  • autoconf-archive
  • autogen
  • automake
  • libtool
  • m4
  • make
  • pkg-config

• Tihmstar's libs:

  • libgeneral
  • libfragmentzip

• External libs:

  • libcurl
  • libirecovery
  • libplist
  • libzip
  • openssl (or you can use CommonCrypto on macOS/OS X)
  • zlib

• Submodules:

  • jssy

• Bundled libs, (not required to be installed manually):

  • tss

To compile, run:

./autogen.sh
make
make install

Help

Usage: tsschecker [OPTIONS]

Example: tsschecker -d iPhone10,3 -B D22AP -e 5482657301265 -i 15.4.1 --generator 0x1111111111111111 -s

option (short)	option (long)	description
-h	--help	prints usage information
-d	--device MODEL	specify device by its model (eg. iPhone10,3)
-i	--ios VERSION	specify firmware version (eg. 15.4.1)
-Z	--buildid BUILD	specify buildid instead of firmware version (eg. 19E258)
-B	--boardconfig BOARD	specify boardconfig instead of device model (eg. d22ap)
-o	--ota	check OTA signing status, instead of normal restore
-b	--no-baseband	don't check baseband signing status. Request tickets without baseband
-m	--build-manifest	manually specify a BuildManifest (can be used with -d)
-s	--save	save fetched shsh blobs (mostly makes sense with -e)
-u	--update-install	request only update tickets
-E	--erase-install	request only erase tickets
-l	--latest	use the latest public firmware version instead of manually specifying one especially useful with -s and -e for saving shsh blobs
-e	--ecid ECID	manually specify ECID to be used for fetching blobs, instead of using random ones ECID must be either DEC or HEX eg. 5482657301265 or 0xab46efcbf71
-g	--generator GEN	manually specify generator in HEX format 16 in length (eg. 0x1111111111111111)
	--apnonce NONCE	manually specify ApNonce instead of using random ones (required when saving blobs for arm64e devices with matching generator)
	--sepnonce NONCE	manually specify SEP Nonce instead of using random ones (not required for saving blobs)
	--bbsnum SNUM	manually specify BbSNUM in HEX to save valid BBTickets (not required for saving blobs)
	--save-path PATH	manually specify the output path for saving shsh blobs
	--server-url URL	manually specify TSS server URL
	--bplist	save fetched blobs as a binary plist in the .bshsh2 format (used with -s)
	--beta	request tickets for a beta instead of normal release (use with -o)
	--list-devices	list known devices from firmwares.json
	--list-versions	list all known firmware versions for the specified device
	--nocache	ignore caches and re-download required files
	--print-tss-request	print the TSS request that will be sent to Apple
	--print-tss-response	print the TSS response that comes from Apple
	--raw	send raw file to Apple's TSS server (useful for debugging)