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better flow without the comma
[[Category:File formats]]
[[Category:File formats]]
== Overview ==
== Overview ==
CIA stands for '''C'''TR '''I'''mportable '''A'''rchive. This format allows the installation titles to the 3DS. CIA files and titles on [[Title list|Nintendo's CDN]] contain identical data. As a consequence, valid CIA files can be generated from CDN content. This also means CIA files can contain anything, titles on Nintendo's CDN can contain.
CIA stands for '''C'''TR '''I'''mportable '''A'''rchive. This format allows the installation titles to the 3DS. CIA files and titles on [[Title list|Nintendo's CDN]] contain identical data. As a consequence, valid CIA files can be generated from CDN content. This also means CIA files can contain anything that titles on Nintendo's CDN can contain.
Under normal circumstances CIA files are used where downloading a title is impractical or not possible. Such as distributing a [[Download Play]] child, or installing forced Gamecard updates. Those CIA(s) are stored by the titles in question, in an auxiliary [[NCCH#CFA|CFA]] file.
Under normal circumstances CIA files are used where downloading a title is impractical or not possible. Such as distributing a [[Download Play]] child, or installing forced Gamecard updates. Those CIA(s) are stored by the titles in question, in an auxiliary [[NCCH#CFA|CFA]] file.
| 0x0C
| 0x0C
| 0x04
| 0x04
| [[CommonETicket|Ticket]] size
| [[Ticket]] size
|-
|-
| 0x10
| 0x10
|-
|-
| 0x20
| 0x20
| 0x01
| 0x2000
| Magic? Must be = 0x80
| Content Index
|}
|}
=== Certificate Chain ===
=== Certificate Chain ===
There are three Certificates in this Chain:
There are three [[Certificates|certificates]] in this chain:
{| class="wikitable" border="1"
{| class="wikitable" border="1"
|-
|-
| 0x180
| 0x180
| 0x280
| 0x180
| Reserved/Unused
| Reserved
|-
| 0x300
| 0x4
| Core Version
|-
| 0x304
| 0xFC
| Reserved
|-
|-
| 0x400
| 0x400
* [https://github.com/3dshax/ctr/tree/master/ctrtool ctrtool] - Reading/Extraction of CIA files. This can only decrypt the title-key for development CIAs, since retail CIAs use the [[AES]] hardware key-scrambler for the common-key keyslot.
* [https://github.com/3dshax/ctr/tree/master/ctrtool ctrtool] - Reading/Extraction of CIA files. This can only decrypt the title-key for development CIAs, since retail CIAs use the [[AES]] hardware key-scrambler for the common-key keyslot.
* [https://github.com/ps3hen/ctr_toolkit/tree/master/make_cia make_cia] - Generating CIA files. Requires CommonKey and ticket/TMD RSA-2048 private exponents.
* [https://github.com/ps3hen/ctr_toolkit/tree/master/make_cdn_cia make_cdn_cia] - (CMD)(Windows/Linux) Generates CIA files from CDN Content
* [https://github.com/ps3hen/ctr_toolkit/tree/master/make_cdn_cia make_cdn_cia] - (CMD)(Windows/Linux) Generates CIA files from CDN Content