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Lockpick/README.md
shchmue 34b960b774 Initial commit
2018-12-07 20:17:01 -05:00

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Lockpick

This is a ground-up C++17 rewrite of homebrew key derivation software, namely kezplez-nx. It also dumps titlekeys. This will dump all keys through *_key_05 on firmwares below 6.2.0 and through *_key_06 on 6.2.0 and above.

What this software does differently

  • Dumps titlekeys
  • Uses the superfast xxHash instead of sha256 when searching exefs for keys for a ~5x speed improvement
  • Gets all possible keys from running process memory - this means no need to decrypt Package2 at all, let alone decompress KIPs
  • Gets header_key without tsec, sbk, master_key_00 or aes sources - which may or may not be the same way ChoiDujourNX does it 👀 (and I'm gonna issue a challenge to homebrew title installers to implement similar code so you don't need your users to use separate software like this 😜 it's up to you to figure out if the same can be done for key_area_keys if needed)

Usage

  1. Use Hekate to dump TSEC and fuses:
    1. Push hekate payload bin using TegraRCMSmash/TegraRCMGUI/modchip/injector
    2. Using the VOL and Power buttons to navigate, select Console info...
    3. Select Print fuse info
    4. Press Power to save fuses to SD card
    5. Select Print TSEC keys
    6. Press Power to save TSEC to SD card
  2. Launch CFW of choice
  3. Open Homebrew Menu
  4. Run Lockpick
  5. Use the resulting prod.keys file as needed and rename if required

Building

Release built with libnx v1.6.0.

Uses freetype which comes with switch-portlibs via devkitPro pacman:

pacman -S libnx switch-portlibs

then run:

make

to build.

Special Thanks

  • tèsnos! For making kezplez-nx, being an all-around cool and helpful person and open to my contributions, not to mention patient with my enthusiasm. kezplez taught me an absolute TON about homebrew.
  • SciresM for hactool, containing to my knowledge the first public key derivation software, and for get_titlekeys.py
  • roblabla for the original keys gist and for believing in our habilities
  • The folks in the ReSwitched Discord server for answering my innumerable questions while researching this (and having such a useful chat backlog!)
  • The memory reading code from jakibaki's sys-netcheat was super useful for getting keys out of running process memory
  • The System Save dumping methodology from Adubbz' Compelled Disclosure
  • Shouts out to fellow key derivers: shadowninja108 for HACGUI, Thealexblarney for Libhac, and rajkosto 👀
  • The constantly-improving docs on Switchbrew wiki and libnx
  • mission2000 for help with std::invoke to get the function timer working
  • Literally the friends I made along the way! I came to the scene late and I've still managed to meet some wonderful people :) Thanks for all the help testing, making suggestions, and cheerleading!

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