nsz
4.6.1
ZSTD压缩算法，一个压缩/解压缩脚本（带有可选的GUI），允许用户可以无光自发地压缩Nintendo Switch转储。压缩文件可以直接使用支持的NSW Homebrew标题安装程序安装。
该存储库的瑞士镜子在https://gitlab.nicobosshard.ch/nicoboss/nsz下保持
如果Github击倒NSZ，这将是新家。请添加书签。
安装此工具有几种方法。您可以在下面找到所有安装的详细信息。
您需要在合适的目录中使用HACTOOL兼容密钥文件来使用此工具。
键文件必须在%USERPROFILE%/.switch/ （windows）/ $HOME/.switch/ （unix）或keys.txt中的prod.keys文件中。您必须合法获取钥匙！
您也可以使用Windows二进制文件。他们不需要安装任何外部库，并且可以在不安装任何内容的情况下运行。您可以在发布页面中找到二进制文件。
下面列出的方法要求您安装Python 3.6+和PIP3。
使用以下命令安装仅控制台的版本：
pip3 install --upgrade nsz
使用以下命令安装GUI版本：
pip3 install --upgrade nsz[gui]
该工具也可以通过克隆存储库，安装需求，然后使用python3 nsz.py执行NSZ来运行该工具。
使用以下命令安装仅控制台的版本要求：
pip3 install -r requirements.txt
使用以下命令安装GUI版本要求：
pip3 install -r requirements-gui.txt
nsz.py --help
usage: nsz.py [-h] [-C] [-D] [-l LEVEL] [-L] [-B] [-S] [-s BS] [-V] [-Q] [-K]
[-F] [-p] [-P] [-t THREADS] [-m MULTI] [-o [OUTPUT]] [-w] [-r]
[--rm-source] [-i] [--depth DEPTH] [-x]
[--extractregex EXTRACTREGEX] [--titlekeys] [--undupe]
[--undupe-dryrun] [--undupe-rename] [--undupe-hardlink]
[--undupe-prioritylist UNDUPE_PRIORITYLIST]
[--undupe-whitelist UNDUPE_WHITELIST]
[--undupe-blacklist UNDUPE_BLACKLIST] [--undupe-old-versions]
[-c CREATE]
[file ...]
positional arguments:
file
options:
-h, --help show this help message and exit
-C Compress NSP/XCI
-D Decompress NSZ/XCZ/NCZ
-l LEVEL, --level LEVEL
Compression Level: Trade-off between compression speed
and compression ratio. Default: 18, Max: 22
-L, --long Enables zStandard long distance mode for even better
compression
-B, --block Use block compression option. This mode allows highly
multi-threaded compression/decompression with random
read access allowing compressed games to be played
without decompression in the future however this comes
with a slightly lower compression ratio cost. This is
the default option for XCZ.
-S, --solid Use solid compression option. Slightly higher
compression ratio but won't allow for random read
access. File compressed this way will never be
mountable (have to be installed or decompressed first
to run). This is the default option for NSZ.
-s BS, --bs BS Block Size for random read access 2^x while x between
14 and 32. Default: 20 => 1 MB
-V, --verify Verifies files after compression raising an unhandled
exception on hash mismatch and verify existing NSP and
NSZ files when given as parameter. Requires --keep
when used during compression.
-Q, --quick-verify Same as --verify but skips the NSP SHA256 hash
verification and only verifies NCA hashes. Does not
require --keep when used during compression.
-K, --keep Keep all useless files and partitions during
compression to allow bit-identical recreation
-F, --fix-padding Fixes PFS0 padding to match the nxdumptool/no-intro
standard. Incompatible with --verify so --quick-verify
will be used instead.
-p, --parseCnmt Extract TitleId/Version from Cnmt if this information
cannot be obtained from the filename. Required for
skipping/overwriting existing files and --rm-old-
version to work properly if some not every file is
named properly. Supported filenames:
*TitleID*[vVersion]*
-P, --alwaysParseCnmt
Always extract TitleId/Version from Cnmt and never
trust filenames
-t THREADS, --threads THREADS
Number of threads to compress with. Numbers < 1
corresponds to the number of logical CPU cores for
block compression and 3 for solid compression
-m MULTI, --multi MULTI
Executes multiple compression tasks in parallel. Take
a look at available RAM especially if compression
level is over 18.
-o [OUTPUT], --output [OUTPUT]
Directory to save the output NSZ files
-w, --overwrite Continues even if there already is a file with the
same name or title id inside the output directory
-r, --rm-old-version Removes older versions if found
--rm-source Deletes source file/s after compressing/decompressing.
It's recommended to only use this in combination with
--verify
-i, --info Show info about title or file
--depth DEPTH Max depth for file info and extraction
-x, --extract Extract a NSP/XCI/NSZ/XCZ/NSPZ
--extractregex EXTRACTREGEX
Regex specifying which files inside the container
should be extracted. Example: "^.*.(cert|tik)$"
--titlekeys Extracts titlekeys from your NSP/NSZ files and adds
missing keys to ./titlekeys.txt and JSON files inside
./titledb/ (obtainable from
https://github.com/blawar/titledb).
--undupe Deleted all duplicates (games with same ID and
Version). The Files folder will get parsed in order so
the later in the argument list the more likely the
file is to be deleted
--undupe-dryrun Shows what files would get deleted using --undupe
--undupe-rename Renames files to minimal standard:
[TitleId][vVersion].nsz
--undupe-hardlink Hardlinks files to minimal standard:
[TitleId][vVersion].nsz
--undupe-prioritylist UNDUPE_PRIORITYLIST
Regex specifying which dublicate deletion should be
prioritized before following the normal deletion
order. Example: "^.*.(nsp|xci)$"
--undupe-whitelist UNDUPE_WHITELIST
Regex specifying which dublicates should under no
circumstances be deleted. Example: "^.*.(nsz|xcz)$"
--undupe-blacklist UNDUPE_BLACKLIST
Regex specifying which files should always be deleted
- even if they are not even a dublicate! Be careful!
Example: "^.*.(nsp|xci)$"
--undupe-old-versions
Removes every old version as long there is a newer one
of the same titleID.
-c CREATE, --create CREATE
Inverse of --extract. Repacks files/folders to an NSP.
Example: --create out.nsp .in
nsz -C /path/to/folder/with/dumps/nsz --verify -C /path/to/folder/with/dumps/nsz --threads 8 --output /path/to/out/dir/ -C /path/to/folder/with/dumps/nsz --level 22 -C /path/to/folder/with/dumps/nsz -D /path/to/folder/with/dumps/要查看每个标志的所有可能标志和描述，请检查使用部分。
NSZ文件在功能上与NSP文件相同。他们的唯一目的是提醒用户其中包含压缩的NCZ文件。 NCZ文件可以与同一容器中的NCA文件混合。
作为此工具的替代方案，NSC_Builder还支持将NSP压缩为NSZ，并将NSZ解压缩到NSP。可以在https://github.com/julesontheroad/nsc_builder下载NSC_Builder
XCZ文件在功能上与XCI文件相同。他们的唯一目的是提醒用户其中包含压缩的NCZ文件。 NCZ文件可以与同一容器中的NCA文件混合。
这些是压缩的NCA文件。 NCA被解密，然后使用Zstandard压缩。
NCZ文件的第一个0x4000字节与原始NCA完全相同（并且仍然加密）。即使第一部分未始于0x4000，这也适用。
在0x4000时，有变量大小的NCZ标头。它包含一个部分列表，这些部分告诉解压缩后如何重新加入NCA数据。它还可以包含一个可选的块压缩标头，允许随机读取访问。
标题中的所有信息都可以从原始的NCA +票证中得出，但是预先提供的以使第三方尽可能容易地减压。
直接在NCZ标头之后，Zstandard流开始并在EOF处结束。该流将其解压缩为偏移0x4000。如果使用块压缩，将流将流拆分为独立块，可以被解压缩，如https://github.com/nicoboss/nsz/blob/master/master/nsz/blockdecompressrassorrader.py.py。压缩框架[BlockId]不得超过解压缩块。如果较小，则必须对块进行解压缩。如果相等，则块存储在纯文本中。
class Section :
def __init__ ( self , f ):
self . magic = f . read ( 8 ) # b'NCZSECTN'
self . offset = f . readInt64 ()
self . size = f . readInt64 ()
self . cryptoType = f . readInt64 ()
f . readInt64 () # padding
self . cryptoKey = f . read ( 16 )
self . cryptoCounter = f . read ( 16 )
class Block :
def __init__ ( self , f ):
self . magic = f . read ( 8 ) # b'NCZBLOCK'
self . version = f . readInt8 ()
self . type = f . readInt8 ()
self . unused = f . readInt8 ()
self . blockSizeExponent = f . readInt8 ()
self . numberOfBlocks = f . readInt32 ()
self . decompressedSize = f . readInt64 ()
self . compressedBlockSizeList = []
for i in range ( self . numberOfBlocks ):
self . compressedBlockSizeList . append ( f . readInt32 ())
nspf . seek ( 0x4000 )
sectionCount = nspf . readInt64 ()
for i in range ( sectionCount ):
sections . append ( Section ( nspf ))
if blockCompression :
BlockHeader = Block ( nspf )NSZ PIP软件包：https：//pypi.org/project/nsz/
论坛线程：https：//gbatemp.net/threads/nsz-homebrew-compatible-nsp-xci-compressor-decompressor.550556/
Sciresm的硬件加密功能；没有此，在这里实现的燃油安装速度（50 MB/sec +）将是不可能的。
感谢我们的贡献者：Nicoboss，Blawar，Plato79，Eughumer，Taorni，Anthonyu，Teknoraver，Kwottrich，Kwottrich，Gabest11，Siddhartha77，Alucryd，Seiya-Git，Seiya-Git，Drizzt，Drizzt，16Bitwonder，2weak2live，Thatch2live，Thatch，Maki-Chan，Maki-Chan，Maki-Chan，Maki-Chan，Maki-Chan，Pr0per，Pr0
