autodecrypt

Simple tool to decrypt iOS firmware images.

Going to the iPhone wiki and copying and pasting firmware keys to your terminal is boring.

autodecrypt will grab keys for you and decrypt the firmware image you want.

Usage

usage: autodecrypt.py [-h] -f IMG_FILE -d DEVICE [-i IOS_VERSION]
                      [-b BUILD_ID] [-c CODENAME] [-l] [--beta] [--download]

optional arguments:
  -h, --help            show this help message and exit
  -f IMG_FILE, --file IMG_FILE
                        img file you want to decrypt
  -d DEVICE, --device DEVICE
                        device ID (eg : iPhone8,1)
  -i IOS_VERSION, --ios IOS_VERSION
                        iOS version for the said file
  -b BUILD_ID, --build BUILD_ID
                        build ID to set instead of iOS version
  -c CODENAME, --codename CODENAME
                        codename of iOS version
  -l, --local           don't download firmware image
  --beta                specify beta firmware
  --download            download firmware image

Dependencies

img4

To run autodecrypt, use poetry with a virtualenv:

virtualenv -p python3 env
pip3 install poetry
poetry install

Installation

pip3 install autodecrypt

Examples

Download and decrypt iBSS using keys from theiphonewiki

» autodecrypt -f iBSS -i 10.3.3 -d iPhone6,2
[i] downloading iBSS.iphone6.RELEASE.im4p
[i] image : ibss
[i] grabbing keys for iPhone6,2/14G60
[x] iv  : f2aa35f6e27c409fd57e9b711f416cfe
[x] key : 599d9b18bc51d93f2385fa4e83539a2eec955fce5f4ae960b252583fcbebfe75
[i] decrypting iBSS.iphone6.RELEASE.im4p to iBSS.iphone6.RELEASE.im4p.dec...
[x] done

Download and decrypt SEP firmware by specifying keys

» autodecrypt -f sep-firmware -b 17C5053a -d iPhone11,8 -k 9f974f1788e615700fec73006cc2e6b533b0c6c2b8cf653bdbd347bc1897bdd66b11815f036e94c951250c4dda916c00
[i] downloading sep-firmware.n841.RELEASE.im4p
[x] iv  : 9f974f1788e615700fec73006cc2e6b5
[x] key : 33b0c6c2b8cf653bdbd347bc1897bdd66b11815f036e94c951250c4dda916c00
[i] decrypting sep-firmware.n841.RELEASE.im4p to sep-firmware.n841.RELEASE.im4p.dec...
[x] done

Use foreman instance to grab firmware keys

» export FOREMAN_HOST="https://foreman-public.sudosecuritygroup.com"
» autodecrypt -f LLB -i 13.2.3 -d iPod9,1
[i] downloading LLB.n112.RELEASE.im4p
[i] image : llb
[i] grabbing keys for iPod9,1/17B111
[i] grabbing keys from https://foreman-public.sudosecuritygroup.com
[x] iv  : 85784a219eb29bcb1cc862de00a590e7
[x] key : f539c51a7f3403d90c9bdc62490f6b5dab4318f4633269ce3fbbe855b33a4bc7
[i] decrypting LLB.n112.RELEASE.im4p to LLB.n112.RELEASE.im4p.dec...
[x] done

Decrypt keys from Device

Since checkra1n 0.9.8.1 you can use autodecrypt and [this tool] to decrypt kbags from userland.

You'll have to run kbag as a server on your idevice and specify IP address with autodecrypt :

» autodecrypt -f iBoot -i 13.3.1 -d iPhone9,3 --ip 192.168.1.4
[i] downloading iBoot.d10.RELEASE.im4p
[i] grabbing keys from gidaes server on 192.168.1.4:12345
[i] kbag : EF95BCD9B0C229D7EBD11EE9CA8FC824C02350BAD10234B4D8838B205266C3E6E37C281F14D0C663534CC79BF39AB269
[x] iv  : 8630e88c3155844eb61289e42f8bde1b
[x] key : da05c8905394ac13ce41beef1d13847bddc0af1252710cb3578a269473f9c3a6
[i] decrypting iBoot.d10.RELEASE.im4p to iBoot.d10.RELEASE.im4p.dec...
[x] done

Log

For debugging purposes you can check autodecrypt.log :

11/02/2019 21:39:41 Launching "['autodecrypt/autodecrypt.py', '-d', 'iPhone9,3', '-f', 'iBoot', '-i', '12.3.1']"
11/02/2019 21:39:41 requesting IPSW's API for iPhone9,3
11/02/2019 21:39:41 done, now looking for version or build
11/02/2019 21:39:41 grabbing firmware codename for 16F203
11/02/2019 21:39:42 codename : PeaceF
11/02/2019 21:39:42 grabbing IPSW file URL for iPhone9,3/12.3.1
11/02/2019 21:39:42 downloading iBoot...
11/02/2019 21:39:43 img4 -i iBoot.d10.RELEASE.im4p iBoot.d10.RELEASE.im4p.dec 978fd4680cd4b624b0dfea22a417f51f0ee2b871defed42277fe18885053b1eb5c7ffe82f38ab8cf7772c69a0db5d386

Credits

checkra1n team for AES patches and kbag.m
kennytm for img3 stuff (removed for the moment)
xerub for img4
tihmstar for wiki parsing (my method was pretty bad)

saddam1999/autodecrypt