NCCH: Difference between revisions

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The extended header, the [[ExeFS]] and the [[RomFS]] are encrypted using 128-bit AES CTR.

By default encrypted regions are compressed with an LZ77 variant, then encrypted. The spec allows for both unencrypted and uncompressed regions to exist~~. Retail SD card CXIs must have the [[ExeFS|ExeFS:/.code]] compressed~~. Development units use a fixed system key for system titles. On retail part of the input [[AES]] engine key is unique per NCCH, the AES engine internally generates the final-normal key.

By default encrypted regions are compressed with an LZ77 variant, then encrypted. The spec allows for both unencrypted and uncompressed regions to exist. Development units use a fixed system key for system titles. On retail part of the input [[AES]] engine key is unique per NCCH, the AES engine internally generates the final-normal key.

On retail for SD applications, exheader_systeminfoflags.flag bit1 must be set.

Retail CFAs use NCCH product code "CTR-P-CTAP", while retail title/gamecard CXIs use NCCH product code "CTR-P-XXXX". This product code is the NCCH [[Serials|serial code]]. The region-locking info checked by home menu is stored in the [[SMDH#BNR Region|icon]].

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 The extended header, the [[ExeFS]] and the [[RomFS]] are encrypted using 128-bit AES CTR.
-By default encrypted regions are compressed with an LZ77 variant, then encrypted. The spec allows for both unencrypted and uncompressed regions to exist. Retail SD card CXIs must have the [[ExeFS|ExeFS:/.code]] compressed. Development units use a fixed system key for system titles. On retail part of the input [[AES]] engine key is unique per NCCH, the AES engine internally generates the final-normal key.
+By default encrypted regions are compressed with an LZ77 variant, then encrypted. The spec allows for both unencrypted and uncompressed regions to exist. Development units use a fixed system key for system titles. On retail part of the input [[AES]] engine key is unique per NCCH, the AES engine internally generates the final-normal key.
+On retail for SD applications, exheader_systeminfoflags.flag bit1 must be set.
 Retail CFAs use NCCH product code "CTR-P-CTAP", while retail title/gamecard CXIs use NCCH product code "CTR-P-XXXX". This product code is the NCCH [[Serials|serial code]]. The region-locking info checked by home menu is stored in the [[SMDH#BNR Region|icon]].