Editing Activation ACF

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ACF, certainly standing for Activation Code File, is a data structure present in the [[Serial Flash]] [[Non Volatile Storage]] of a PS4 Dev/Test Kit or prototype when it is activated.
ACF is a data structure stored in PS4 Kit System Flash at offset [http://www.psdevwiki.com/ps4/Flash-Main#0x1C9080_ACF_.28Dev.2FTest.29 0x1C9080].


On PS Vita, compared to PS4, it is named "act" instead of "acf" and is stored in Syscon NVS instead of Serial Flash NVS. On PS5, Kit activation requires a [https://www.psdevwiki.com/ps5/CP_Box Communication Processor Box] and so may be contained in the [https://www.psdevwiki.com/ps5/CP_Box_Non_Volatile_Storage PS5 CP Box NVS].
See also [https://wiki.henkaku.xyz/vita/AFV PSVita equivalent].
 
See also [https://wiki.henkaku.xyz/vita/AFV PS Vita Activation AFV especially its token] and [https://wiki.henkaku.xyz/vita/Ernie#NVS PS Vita Syscon NVS Activation Data].
 
The PS4 ACF is completed by a RSA-2048 signature stored as well in the [[Serial Flash]] [[NVS]].
 
The PS4 ACF is checked in the sceSblDevActVerifyCheckExpire kernel function.


= Structure =
= Structure =


Total length is 0x68 bytes. It may also be 0x6C bytes for some PS4 consoles, according to zecoxao.
Total length is 0x68 bytes.
 
It is written to a 0x80-byte area in [[Serial Flash]] [[Non Volatile Storage]] bank 0 block 4 offset 0x80.


{| class="wikitable"
{| class="wikitable"
|-
|-
! Offset !! Size !! Description
! From !! To !! Description
|-
|-
| 0 || 4 || '''Magic'''. Always "acf\0" on PS4, "act\0" on PS Vita.
| 1C9080 || 1C9083 || '''Magic''' "ACF\0"
|-
|-
| 4 || 1 || '''Format Version'''. Always 1 on PS4 and PS Vita.
| 1C9084 || 1C9087 || '''Format version''' Constant 4 bytes. (format_ver, format_minor_ver)
|-
|-
| 5 || 1 || '''Format Minor Version'''. Always 2 on PS4, 0 on PS Vita.
| 1C9088 || 1C9097 || '''Activation Key'''
|-
|-
| 6 || 2 || '''Reserved'''. Padding. Always zeroed on PS4 and PS Vita.
| 1C9098 || 1C909B || '''Issue Number'''
|-
|-
| 8 || 0x10 || '''Activation Key'''. Likely derived from OpenPsId.
| 1C909C || 1C909F || '''Start date''' 4 bytes. Little Endian.
|-
|-
| 0x18 || 4 || '''Issue Number'''. Ex: 3, 15.
| 1C90A0 || 1C90A3 || '''Expire date''' 4 bytes. Little Endian. Usually 90 days since Start date.
|-
|-
| 0x1C || 4 || '''Start Date'''. Little Endian.
| 1C90A4 || 1C90A7 || '''Reserved''' Always zeroed.
|-
|-
| 0x20 || 4 || '''End Date'''. Little Endian. Usually 90 days after Start Date.
| 1C90A8 || 1C90E7 || '''Key_Hash''' Unique 64 bytes.
|-
|-
| 0x24 || 4 || '''Reserved'''. Always zeroed.
|-
| 0x28 || 0x40 || '''Key Hash'''. Unique hash of previous data (maybe AES-CMAC (0x20 key + 0x20 hash) or HMAC). On PS Vita it is a 16-byte AES-128-CMAC hash.
|}
|}


<syntaxhighlight lang="C">
<source lang="C">
  typedef struct SceAcf {
  typedef struct SceAcf {
     char magic[4];
     char magic[4];
     uint8_t format_ver;
     uint32_t format_ver;
    uint8_t format_minor_ver;
    uint16_t reserved;
     char activation_key[16];
     char activation_key[16];
     uint32_t issue_no;  
     uint32_t issue_no;  
     uint32_t start_date;
     uint32_t start_date;
     uint32_t end_date;
     uint32_t expire_date;
     uint32_t reserved;
     uint32_t reserved; // Maybe just padding
     char key_hash[64];
     char key_hash[64];
  } SceAcf;
  } SceAcf;
</syntaxhighlight>
</source>


= RSA-2048 Signature =
= Example =
 
A RSA-2048 signature of the ACF is present in [[Serial Flash]] [[NVS]] bank 0 block 4 offset 0x900.
 
On PS Vita, the RSA-2048 signature is only present since System Software version 2.10 and is stored in the eMMC in the tm0:act/actsig.dat file instead of the NVS.


= Example =
Structure and constant bytes are for every Dev / Test the same. Example:


* Magic bytes: red.
* Magic bytes: red.
Line 69: Line 52:
  Offset(h) 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
  Offset(h) 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
  001C9080  <span style="background:#ff6666;">61 63 66 00</span> <span style="background:#8888ff;">01 02 00 00</span> <span style="background:#00ff00;">D6 B1 DA DE C7 82 7A A4</span> acf.....Ö±ÚÞÇ‚z¤
  001C9080  <span style="background:#ff6666;">61 63 66 00</span> <span style="background:#8888ff;">01 02 00 00</span> <span style="background:#00ff00;">D6 B1 DA DE C7 82 7A A4</span> acf.....Ö±ÚÞÇ‚z¤
  001C9090  <span style="background:#00ff00;">21 AE 4E D0 D9 BF B1 1A 03 00 00 00 11 55 E2 52</span> !®NÐÙ¿±......UâR
  001C9090  <span style="background:#00ff00;">21 AE 4E D0 D9 BF B1 1A</span> <span style="background:#8888ff;">03 00 00 00</span> <span style="background:#00ff00;">11 55 E2 52</span> !®NÐÙ¿±......UâR
  001C90A0  <span style="background:#00ff00;">11 FC 58 53</span> <span style="background:#8888ff;">00 00 00 00</span> <span style="background:#00ff00;">CC B4 CD 3A 0A F5 C0 F4</span> .üXS....Ì´Í:.õÀô
  001C90A0  <span style="background:#00ff00;">11 FC 58 53</span> <span style="background:#8888ff;">00 00 00 00</span> <span style="background:#00ff00;">CC B4 CD 3A 0A F5 C0 F4</span> .üXS....Ì´Í:.õÀô
  001C90B0  <span style="background:#00ff00;">4F 04 6B C3 95 16 E6 D8 FB 0B F2 56 B0 3B BA 00</span> O.kÕ.æØû.òV°;º.
  001C90B0  <span style="background:#00ff00;">4F 04 6B C3 95 16 E6 D8 FB 0B F2 56 B0 3B BA 00</span> O.kÕ.æØû.òV°;º.
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