Editing Activation File
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| Latest revision | Your text | ||
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=== File Verification === | === File Verification === | ||
A HMACSHA256 of the entire act.dat file using the SHA256 of the OpenPsId as the key is stored in Vtrm using SceShellCore's | A HMACSHA256 of the entire act.dat file using the SHA256 of the OpenPsId as the key is stored in Vtrm using SceShellCore's process ID in slot 0. | ||
SceShellCore's process ID is <code>0x3800000000000010</code>. | |||
<code>hmacsha256(sha256(sceKernelGetOpenPsIdForSystem()), act.dat)</code> (pseudo-code) | <code>hmacsha256(sha256(sceKernelGetOpenPsIdForSystem()), act.dat)</code> (pseudo-code) | ||
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This prevents easily adding or replacing the act.dat file directly. You will need to update this HMAC to prevent the act.dat file from being deleted when adding or replacing it. | This prevents easily adding or replacing the act.dat file directly. You will need to update this HMAC to prevent the act.dat file from being deleted when adding or replacing it. | ||
== File == | == File Structure == | ||
An act.dat file is made up of 1 to 21 sequential activation structures. | An act.dat file is made up of 1 to 21 sequential activation structures. | ||
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The file is truncated to valid activation structures, so its size will be a multiple of 512. | The file is truncated to valid activation structures, so its size will be a multiple of 512. | ||
=== Activation | === Activation Structure === | ||
Fields are big-endian. | Fields are big-endian. | ||
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| Signature || <code>0x000</code> || 4 || <code>41 43 54 00</code> ('ACT\0') | | Signature || <code>0x000</code> || 4 || <code>41 43 54 00</code> ('ACT\0') | ||
|- | |- | ||
| Version || <code>0x004</code> || 2 || <code>00 01</code> || 1 | | Version || <code>0x004</code> || 2 || <code>00 00 00 01</code> || 1 (current) | ||
|- | |- | ||
| Type || <code>0x006</code> || 2 || <code>00 02</code> || 2 or 3 | | Type || <code>0x006</code> || 2 || <code>00 00 00 02</code> || 2 or 3 | ||
|- | |- | ||
| PSN Account ID || <code>0x008</code> || 8 || <code>AB CD EF 01 02 34 78 91</code> || | | PSN Account ID || <code>0x008</code> || 8 || <code>AB CD EF 01 02 34 78 91</code> || | ||
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| Unknown || <code>0x020</code> || 64 || - || | | Unknown || <code>0x020</code> || 64 || - || | ||
|- | |- | ||
| | | OpenPsId SHA256 Hash || <code>0x060</code> || 32 || - || <code>sha256(sceKernelGetOpenPsIdForSystem())</code> (pseudo-code) | ||
|- | |- | ||
| Unknown || <code>0x080</code> || 32 || - || Found to match exactly for different users and consoles. Maybe system version SHA256 hash? | | Unknown || <code>0x080</code> || 32 || - || Found to match exactly for different users and consoles. Maybe system version SHA256 hash? | ||
|- | |- | ||
| | | Unknown || <code>0x0A0</code> || 16 || - || Match exactly to data found in RIF data at 0x260 of same size (KDS RIF only) | ||
|- | |- | ||
| | | Unknown || <code>0x0B0</code> || 16 || - || Used to decrypt RIF secret data (KDS RIF only) | ||
|- | |- | ||
| Unknown || <code> | | Unknown || <code>0x0C0</code> || 64 || - || | ||
|- | |- | ||
| RSA Signature || <code>0x100</code> || 256 || - || Verified using same public key as RIF type 0 | | RSA Signature || <code>0x100</code> || 256 || - || Verified using same public key as RIF type 0 | ||