NCCH: Difference between revisions

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All of the hashes stored in this NCCH header are over the cleartext data. The ExeFS/RomFS superblock starts at offset 0x0 in the ExeFS/RomFS, and the size is specified by the hash region fields.

As of [[5.0.0-11]] the application [[ExeFS]]:/.logo can be loaded from the plaintext region between the access descriptor and the plain region, all applications built since [[5.0.0-11]] store the logo here. ~~Normally the~~ size of this logo 0x2000-bytes.

As of [[5.0.0-11]] the application [[ExeFS]]:/.logo can be loaded from the plaintext region between the access descriptor and the plain region, all applications built since [[5.0.0-11]] store the logo here. The size of this logo is always 0x2000-bytes.

The plain region mainly contains tags for each SDK library used when building the CXI. The version used for the "FIRMWARE" tag is the kernel/FIRM [[Configuration_Memory|version]], this version can also be stored in the exheader "kernel release version" ARM11 kernel descriptor field.

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| 0x130

| 0x20

| For [[5.0.0-11]]+ applications, this is a SHA-256 hash of the logo located between the access-desc and plain region.

| For [[5.0.0-11]]+ applications, this is a SHA-256 hash of the 0x2000-byte logo located between the access-desc and plain region.

|-

| 0x150

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| Memory type (00 = Base, 01 = Application, 02 = System)

|}

== Tools ==

@@ Line 45: / Line 45: @@
 All of the hashes stored in this NCCH header are over the cleartext data. The ExeFS/RomFS superblock starts at offset 0x0 in the ExeFS/RomFS, and the size is specified by the hash region fields.
-As of [[5.0.0-11]] the application [[ExeFS]]:/.logo can be loaded from the plaintext region between the access descriptor and the plain region, all applications built since [[5.0.0-11]] store the logo here. Normally the size of this logo 0x2000-bytes.
+As of [[5.0.0-11]] the application [[ExeFS]]:/.logo can be loaded from the plaintext region between the access descriptor and the plain region, all applications built since [[5.0.0-11]] store the logo here. The size of this logo is always 0x2000-bytes.
 The plain region mainly contains tags for each SDK library used when building the CXI. The version used for the "FIRMWARE" tag is the kernel/FIRM [[Configuration_Memory|version]], this version can also be stored in the exheader "kernel release version" ARM11 kernel descriptor field.
@@ Line 98: / Line 98: @@
 | 0x130
 | 0x20
-| For [[5.0.0-11]]+ applications, this is a SHA-256 hash of the logo located between the access-desc and plain region.
+| For [[5.0.0-11]]+ applications, this is a SHA-256 hash of the 0x2000-byte logo located between the access-desc and plain region.
 |-
 |  0x150
@@ Line 281: / Line 281: @@
 |  Memory type (00 = Base, 01 = Application, 02 = System)
 |}
 == Tools ==