533
edits
Changes
m
→Main header
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Line 4:
|-
−| 0x1E4
−| 36*nbr_cont
−| Contents
== Structure ==
== Structure ==
−=== Header ===
+=== Signed blob header ===
{| class="wikitable"
{| class="wikitable"
|- style="background-color: #ddd;"
|- style="background-color: #ddd;"
−! Start
+! Absolute offset
! Length
! Length
! Description
! Description
Line 13:
Line 13:
| 0x000
| 0x000
| 4
| 4
−| Signature type
+| Signature type (always 0x10001 for RSA-2048 w/ SHA-1)
|-
|-
| 0x004
| 0x004
| 256
| 256
−| Signature
+| Signature covering the main header as well as all CMDs
|-
|-
| 0x104
| 0x104
| 60
| 60
| Padding for 64-byte alignment
| Padding for 64-byte alignment
+|}
+
+=== Main header ===
+{| class="wikitable"
+|- style="background-color: #ddd;"
+! Absolute offset
+! Length
+! Description
|-
|-
| 0x140
| 0x140
| 64
| 64
−| Issuer
+| Certificate issuer
|-
|-
| 0x180
| 0x180
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| 0x184
| 0x184
| 8
| 8
−| System Version - if this is set to something other than "title" 0-0, then when launching this title, if [[:/sys/launch.sys]] does not exist, the parameters to ES_LaunchTitle are written to that file, then the title ID in this field is launched. This is typically used to force titles to run under a certain IOS, but it can theoretically be any title, and this can be chained. For [[boot2]], this is set to the Boot2 version (for example, 0-4 for [[boot2v4]])
+| System Version (the IOS that the title needs, Set to 0 for IOS itself. For the boot2, this is identical to the boot2 version.)
|-
|-
| 0x18C
| 0x18C
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| 0x1E2
| 0x1E2
| 2
| 2
−| Unused
+| Minor version (unused - the term typically refers to the lower half of the main version instead)
−|}
|}
−=== Content ===
+=== Content metadata (CMD) ===
+Following the main header (starting at offset 0x1E4) is a list of CMDs (one per content).
+{| class="wikitable"
{| class="wikitable"
|-
|-
−! Start
+! Offset
! Length
! Length
! Description
! Description
Line 139:
Line 145:
{| class="wikitable"
{| class="wikitable"
|-
|-
−! Start
+! Offset
! Length
! Length
! Description
! Description
Line 157:
Line 163:
| 0x124
| 0x124
| 4
| 4
−| Tag
+| Public Key Type
|-
|-
| 0x128
| 0x128
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Line 169:
| Name
| Name
|-
|-
−| 0x168
+| 0x12C
+| 4
+| Date
+|-
+| 0x16C
|
|
−| Key
+| Public Key
|}
|}
Line 243:
Line 253:
u8 sig[256]; // 256 for RSA_2048, 512 for RSA_4096
u8 sig[256]; // 256 for RSA_2048, 512 for RSA_4096
u8 issuer[32];
u8 issuer[32];
− u32 tag; // identifies what is being signed
+ u32 key_type; // the type of public key
u8 name[64]; // name of thing being signed
u8 name[64]; // name of thing being signed
u8 key[...];
u8 key[...];