Changes

=== File structure ===  

=== File structure ===  

{| style="border-collapse: collapse; padding: 0.2em 0.2em 0.2em 0.2em;"

{| class="wikitable"

|- style="background-color: #ddd;"

|-

| style="border: 1px solid #ccc; padding: 0.2em; background-color: #ded;" | '''Start'''

! Start

| style="border: 1px solid #ccc; padding: 0.2em; background-color: #ddd;" | '''Length'''

! Length

| style="border: 1px solid #ccc; padding: 0.2em; background-color: #edd;" | '''Description'''

! Description

|- style="background-color: #ddd;"

|-

| style="border: 1px solid #ccc; padding: 0.2em; background-color: #ded;" | 0x000

| 0x000

| style="border: 1px solid #ccc; padding: 0.2em; background-color: #ddd;" | 4

| 4

| style="border: 1px solid #ccc; padding: 0.2em; background-color: #edd;" | Signature type (always 0x10001 for RSA-2048)

| Signature type (always 0x10001 for RSA-2048)

|- style="background-color: #ddd;"

|-

| style="border: 1px solid #ccc; padding: 0.2em; background-color: #ded;" | 0x005

| 0x005

| style="border: 1px solid #ccc; padding: 0.2em; background-color: #ddd;" | 256

| 256

| style="border: 1px solid #ccc; padding: 0.2em; background-color: #edd;" | Signature by a certificate's key (everything after this field is covered by this signature)

| Signature by a certificate's key (everything after this field is covered by this signature)

|- style="background-color: #ddd;"

|-

| style="border: 1px solid #ccc; padding: 0.2em; background-color: #ded;" | 0x140

| 0x140

| style="border: 1px solid #ccc; padding: 0.2em; background-color: #ddd;" | 64

| 64

| style="border: 1px solid #ccc; padding: 0.2em; background-color: #edd;" | Signature issuer

| Signature issuer

|- style="background-color: #ddd;"

|-

| style="border: 1px solid #ccc; padding: 0.2em; background-color: #ded;" | 0x1bf

| 0x1bf

| style="border: 1px solid #ccc; padding: 0.2em; background-color: #ddd;" | 16

| 16

| style="border: 1px solid #ccc; padding: 0.2em; background-color: #edd;" | Encrypted title key

| Encrypted title key

|- style="background-color: #ddd;"

|-

| style="border: 1px solid #ccc; padding: 0.2em; background-color: #ded;" | 0x1dc

| 0x1dc

| style="border: 1px solid #ccc; padding: 0.2em; background-color: #ddd;" | 8

| 8

| style="border: 1px solid #ccc; padding: 0.2em; background-color: #edd;" | Title ID / [http://en.wikipedia.org/wiki/Initialization_Vector Initialization Vector] (IV) used for AES-[http://en.wikipedia.org/wiki/Cipher_Block_Chaining#Cipher-block_chaining_.28CBC.29 CBC] encryption

| Title ID / [http://en.wikipedia.org/wiki/Initialization_Vector Initialization Vector] (IV) used for AES-[http://en.wikipedia.org/wiki/Cipher_Block_Chaining#Cipher-block_chaining_.28CBC.29 CBC] encryption

|- style="background-color: #ddd;"

|-

| style="border: 1px solid #ccc; padding: 0.2em; background-color: #ded;" | 0x1f1

| 0x1f1

| style="border: 1px solid #ccc; padding: 0.2em; background-color: #ddd;" | 1

| 1

| style="border: 1px solid #ccc; padding: 0.2em; background-color: #edd;" | Common Key index (1 = Korean Common key, 0 = "normal" Common key)

| Common Key index (1 = Korean Common key, 0 = "normal" Common key)

|- style="background-color: #ddd;"

|-

| style="border: 1px solid #ccc; padding: 0.2em; background-color: #ded;" | 0x222

| 0x222

| style="border: 1px solid #ccc; padding: 0.2em; background-color: #ddd;" | 32

| 32

| style="border: 1px solid #ccc; padding: 0.2em; background-color: #edd;" | Always 0xFF (?)

| Always 0xFF (?)

|- style="background-color: #ddd;"

|-

| style="border: 1px solid #ccc; padding: 0.2em; background-color: #ded;" | 0x264

| 0x264

| style="border: 1px solid #ccc; padding: 0.2em; background-color: #ddd;" | 4

| 4

| style="border: 1px solid #ccc; padding: 0.2em; background-color: #edd;" | Enable time limit (1 = Enabled, 0 = Disabled)

| Enable time limit (1 = Enabled, 0 = Disabled)

|- style="background-color: #ddd;"

|-

| style="border: 1px solid #ccc; padding: 0.2em; background-color: #ded;" | 0x268

| 0x268

| style="border: 1px solid #ccc; padding: 0.2em; background-color: #ddd;" | 4

| 4

| style="border: 1px solid #ccc; padding: 0.2em; background-color: #edd;" | Time limit (Seconds)

| Time limit (Seconds)

|}

|}

To get the title key decrypt the 16 bytes at offset 0x1bf with the Common Key using the Title ID (offset 0x1dc) as the initialization vector (the last 8 bytes of the IV should be zero).

To get the title key decrypt the 16 bytes at offset 0x1bf with the Common Key using the Title ID (offset 0x1dc) as the initialization vector (the last 8 bytes of the IV should be zero).