Nn idbe.rpl: Difference between revisions

← Older edit

@@ Line 17: / Line 17: @@
 == Encryption ==
-The icon database is encrypted with AES-128-CBC. There's a two byte header:
-byte 0: always zero.
-byte 1: aes key index
-followed by encrypted data.
 nn_idbe contains hardcoded keys in one 0x50 sized block (0x10 * 5), consisting of the 16-byte hardcoded IV, and 4 hardcoded 16-byte AES-128 keys.
-In OSv12 (000500101000400A), the keys are located at $.rodata+0x4c of nn_idbe.rpl.
+In OSv10 (000500101000400A), the keys are located at $.rodata+0x4c of nn_idbe.rpl.
-Here are the keys: (no copyright issue as OSv12 is a free title Kappa)
+Here are the keys:
 <syntaxhighlight lang="Python">
@@ Line 44: / Line 37: @@
 </syntaxhighlight>
-== Decrypted icon format ==
+== Icon format ==
+=== Encrypted ===
+{| class="wikitable"
+! Offset
+! Length
+! Description
+|-
+| 0x0
+| 0x1
+| Always 0
+|-
+| 0x1
+| 0x1
+| AES key index
+|-
+| 0x2
+| Remainder
+| Encrypted file contents
+|}
+=== Decrypted ===
 {| class="wikitable"
@@ Line 72: / Line 87: @@
 |-
 | 0x50
-| 0x80*64
+| 0x200*16
-| 64 UTF-16 blocks of text for the publisher/title name. Each block has a length of 0x80 (See note 2 below)
+| Title Info (See note 2 below)
 |-
 | 0x2050
 | Remainder
 | Original TGA
+|}
+=== Title Info ===
+{| class="wikitable"
+! Offset
+! Length
+! Description
+|-
+| 0x0
+| 0x80
+| Short title name
+|-
+| 0x80
+| 0x100
+| Full title name
+|-
+| 0x180
+| 0x80
+| Publisher
 |}
 '''Note 1:'''
-The first 8 bytes of this section seem to always be relatively empty, where as the last 10 seem to always been some combination of the characters € and À.
+The first 8 bytes of this section seem to always be relatively empty, where as the last 16 seem to always been some combination of the characters € and À.
 '''Examples:'''
@@ Line 92: / Line 127: @@
 '''Note 2:'''
-Each block always has a length of 0x80, even if the string does not take up the entire (or any of the) block. Some games have plain-text strings starting here, where others have empty null bytes or seemingly garbage text (sometimes a mix of all 3). There also seems to be a strict format/rule set for how the publisher/title names are supposed to be laid out and structured, but it is not known at the moment.
+Each of the 16 0x200-length groups has 3 UTF-16-BE text blocks. There is always 3 blocks, even if the string does not take up the entire (or any of the) block. Each group is for a different language/region. The first group is for Japanese, the order of the other languages is unknown.
 '''Examples:'''