Hactool Switch

Hactool
General
Author	SciresM
Type	PC Utilities
Version	1.4.0
License	ISC
Last Updated	2020/06/02
Links
Download
Website
Source

hactool is a tool to view information about, decrypt, and extract common file formats for the Nintendo Switch, especially Nintendo Content Archives.

It is heavily inspired by ctrtool.

Features

• View information about, decrypt, and extract common file formats for the Nintendo Switch.
• Support for reading plaintext Package2 files.
• NPDM > JSON conversion.
• KIP1 > JSON conversion.
• Keygen can now be performed without passing a BOOT0 file.
• Support for newer XCIs with a logo partition.
• Support for pre-1.0.0 NCA0 files.
• Support for uncompressing NSO0 and KIP1 files via --uncompressed=
• Titlekeys can be loaded from an external "title.keys" file, located in the same directory as prod.keys or dev.keys. -Titlekeys should be stored in the format hexadecimal_rights_id = hexadecimal_title_key.
• Various [WARN]s when odd behavior is detected.
• Support for NAX0 (Nintendo Aes Xts File(system), SD Card content).
• Support for key derivation using EKS (keyblobs) and sbk/tsec key.
• Support for pre-1.0.0 "NCA2" content.

User guide

Supported Switch file formats

NCA XCI HFS0 PFS0 RomFS Package1 (PK11) Package2 (PK21)

NPDM INI1 KIP1 NAX0 NSO0 Save files

Usage

Usage: hactool [options...] <file>
Options:
-i, --info        Show file info.
                      This is the default action.
-x, --extract     Extract data from file.
                      This is also the default action.
  -r, --raw          Keep raw data, don't unpack.
  -y, --verify       Verify hashes and signatures.
  -d, --dev          Decrypt with development keys instead of retail.
  -k, --keyset       Load keys from an external file.
  -t, --intype=type  Specify input file type [nca, xci, pfs0, romfs, hfs0, npdm, pk11, pk21, ini1, kip1, nax0, save, keygen]
  --titlekey=key     Set title key for Rights ID crypto titles.
  --contentkey=key   Set raw key for NCA body decryption.
  --disablekeywarns  Disables warning output when loading external keys.
NCA options:
  --plaintext=file   Specify file path for saving a decrypted copy of the NCA.
  --header=file      Specify Header file path.
  --section0=file    Specify Section 0 file path.
  --section1=file    Specify Section 1 file path.
  --section2=file    Specify Section 2 file path.
  --section3=file    Specify Section 3 file path.
  --section0dir=dir  Specify Section 0 directory path.
  --section1dir=dir  Specify Section 1 directory path.
  --section2dir=dir  Specify Section 2 directory path.
  --section3dir=dir  Specify Section 3 directory path.
  --exefs=file       Specify ExeFS file path. Overrides appropriate section file path.
  --exefsdir=dir     Specify ExeFS directory path. Overrides appropriate section directory path.
  --romfs=file       Specify RomFS file path. Overrides appropriate section file path.
  --romfsdir=dir     Specify RomFS directory path. Overrides appropriate section directory path.
  --listromfs        List files in RomFS.
  --baseromfs        Set Base RomFS to use with update partitions.
  --basenca          Set Base NCA to use with update partitions.
  --basefake         Use a fake Base RomFS with update partitions (all reads will return 0xCC).
  --onlyupdated      Ignore non-updated files in update partitions.
NPDM options:
  --json=file        Specify file path for saving JSON representation of program permissions to.
KIP1 options:
  --json=file        Specify file path for saving JSON representation of program permissions to.
  --uncompressed=f   Specify file path for saving uncompressed KIP1.
NSO0 options:
  --uncompressed=f   Specify file path for saving uncompressed NSO0.
PFS0 options:
  --pfs0dir=dir      Specify PFS0 directory path.
  --outdir=dir       Specify PFS0 directory path. Overrides previous path, if present.
  --exefsdir=dir     Specify PFS0 directory path. Overrides previous paths, if present for ExeFS PFS0.
RomFS options:
  --romfsdir=dir     Specify RomFS directory path.
  --outdir=dir       Specify RomFS directory path. Overrides previous path, if present.
  --listromfs        List files in RomFS.
HFS0 options:
  --hfs0dir=dir      Specify HFS0 directory path.
  --outdir=dir       Specify HFS0 directory path. Overrides previous path, if present.
  --exefsdir=dir     Specify HFS0 directory path. Overrides previous paths, if present.
XCI options:
  --rootdir=dir      Specify XCI root HFS0 directory path.
  --updatedir=dir    Specify XCI update HFS0 directory path.
  --normaldir=dir    Specify XCI normal HFS0 directory path.
  --securedir=dir    Specify XCI secure HFS0 directory path.
  --logodir=dir      Specify XCI logo HFS0 directory path.
  --outdir=dir       Specify XCI directory path. Overrides previous paths, if present.
Package1 options:
  --package1dir=dir  Specify Package1 directory path.
  --outdir=dir       Specify Package1 directory path. Overrides previous path, if present.
Package2 options:
  --package2dir=dir  Specify Package2 directory path.
  --outdir=dir       Specify Package2 directory path. Overrides previous path, if present.
  --extractini1      Enable INI1 extraction to default directory (redundant with --ini1dir set).
  --ini1dir=dir      Specify INI1 directory path. Overrides default path, if present.
INI1 options:
  --ini1dir=dir      Specify INI1 directory path.
  --outdir=dir       Specify INI1 directory path. Overrides previous path, if present.
  --saveini1json     Enable generation of JSON descriptors for all INI1 members.
NAX0 options:
  --sdseed=seed      Set console unique seed for SD card NAX0 encryption.
  --sdpath=path      Set relative path for NAX0 key derivation (ex: /registered/000000FF/cafebabecafebabecafebabecafebabe.nca).
Save data options:
  --outdir=dir       Specify save directory path.
  --listfiles        List files in save file.
Key Derivation options:
  --sbk=key          Set console unique Secure Boot Key for key derivation.
  --tseckey=key      Set console unique TSEC Key for key derivation.```

External Keys

External keys can be provided by the -k/--keyset argument to the a keyset filename. Keyset files are text files containing one key per line, in the form "key_name = HEXADECIMALKEY". Case shouldn't matter, nor should whitespace.

In addition, if -k/--keyset is not set, hactool will check for the presence of a keyset file in $HOME/.switch/prod.keys (or $HOME/.switch/dev.keys if -d/--dev is set). If present, this file will automatically be loaded.

Screenshots

Media

Decrypting Switch Firmwares with hactool: a tutorial ((C)ode e(X)ecute)

Changelog

v1.4.0 2020/06/02

• Support was fixed for parsing save files (thanks @shchmue).
• Support was fixed for extracting package1 binaries newer than 4.0.0.
• Support was added for performing mariko-specific key derivation.
• Support was added for decrypting and extracting mariko package1 binaries.

v1.3.3 2020/04/06

• Support was added for parsing Chinese game cards, which use a new hashing algorithm to validate HFS0 partitions.

v1.3.2 3030/03/19

• Support was added for validating new NCA header fixed-keys (9.x+).
• Romfs is now parsed via an iterative loop instead of recursion to prevent possible stack exhaustion.

v1.3.1 2020/02/22

• Output was fixed for displaying certain SDK versions.
• Support was added for validating new ACID keys (9.x+).

v1.3.0 2020/01/16

• Support was fixed for new (8.0.0+) key generation.
• Support was added for extracting 8.0.0+ Package2 binaries.
• SVC and key generation names were updated to latest definitions.
• Support was added for parsing and extracting save files (thanks @shchmue).
• Support was added for decrypting and parsing the encrypted XCI header area (thanks @jakcron).
• NPDM output was corrected when parsing the version field.
• Support was added for suppressing output of sensitive/decrypted keys.
• Support was added for only extracting NCAs if the content type is one specified.
• Support was added for automatically appending the NCA section type to extracted section content paths if an option is specified.
• Key derivation was fixed when deriving master keks from keyblobs.
• title.keys content restrictions were made looser (non-key lines are now allowed).
• Support was added for skipping output of invalid key warnings.
• A bug was fixed that caused PFS0 file entry calculations to fail.

v1.2.2 2018/11/24

• Support was added for 6.2.0+ new key derivation using tsec_root_key and master_kek_source_##.
• 6.2.0 keydata will no longer be called "Unknown".
• A bug was fixed involving argument violation to mbed_tls aes routines.

v1.2.1 2018/11/04

• Update extraction support should no longer cause errors.
• NPDM JSON output has been switched over to the new format.
• 6.x keydata will no longer be called "Unknown".

v1.2.0 2018/07/24

• New Features:
  • Support for reading plaintext Package2 files was added.
  • NPDM -> JSON conversion was added.
  • KIP1 -> JSON conversion was added.
  • Keygen can now be performed without passing a BOOT0 file.
  • Support for newer XCIs with a logo partition was added.
  • Support for pre-1.0.0 NCA0 files was added.
  • Support for uncompressing NSO0 and KIP1 files was added via --uncompressed=
  • Titlekeys can now be loaded from an external "title.keys" file, located in the same directory as prod.keys or dev.keys. Titlekeys should be stored in the format hexadecimal_rights_id = hexadecimal_title_key.
  • Various [WARN]s were added when odd behavior is detected.
• Bugs fixed:
  • NAX0 decryption failed when reading at unaligned offsets.
  • NCAs making use of AES-XTS crypto are no longer completely broken.
  • Support for pre-1.0.0 NCA2 files was fixed, and now works properly.
  • Getopt is no longer broken on arm-linux (thanks @jakibaki).
  • Too many small ones to count.
• Breaking changes:
  • "encrypted_header_key" was changed in keyset loading to "header_key_source", in order to be consistent with other key names.

v1.1.0 2018/04/28

• New Features:
  • Added support for NAX0 (Nintendo Aes Xts File(system), SD Card content).
  • Added support for key derivation using EKS (keyblobs) and sbk/tsec key.
  • Support was added for pre-1.0.0 "NCA2" content.
• Bugs fixed:
  • BKTR did not support the non-single bucket case, affecting games with huge patches (Splatoon 2, maybe others).
  • Too many small ones to count.

v1.0.1 2018/02/08

• Bugs fixed:
  • Memory corruption when parsing some NPDMs.
  • Invalid AES mode used for titlekey decryption.
  • BKTR section validity unchecked before accessing decrypted data.
  • Edge case in BKTR subsection layout would cause infinite recursion.

v1.0 2018/02/07

• First Release.

External links

• GitHub - https://github.com/SciresM/hactool
• GBAtemp - https://gbatemp.net/threads/hactool-release-by-sciresm.496146/