Activation ACF: Difference between revisions

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


{| class="wikitable"
{| class="wikitable"
|-
|-
! From !! To !! Description
! Offset !! Size !! Description
|-
| 0 || 4 || '''Magic'''. Always "acf\0" on PS4, "act\0" on PS Vita.
|-
|-
| 1C9080 || 1C9083 || '''MAGIC''' acf
| 4 || 1 || '''Format Version'''. Always 1 on PS4 and PS Vita.
|-
|-
| 1C9084 || 1C9087 || '''Constant1''' Constant 4 bytes always the same. (format_ver, format_minor_ver inside)
| 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 || '''Constant2''' Constant 4 bytes always the same.
| 8 || 0x10 || '''Activation Key'''. Likely derived from OpenPsId.
|-
|-
| 1C909C || 1C909F || '''Last start activation date''' 4 bytes. Little Endian.
| 0x18 || 4 || '''Issue Number'''. Ex: 3, 15.
|-
|-
| 1C90A0 || 1C90A3 || '''Last end activation date''' 4 bytes. Little Endian. Usually 90 days more than Last start activation date.
| 0x1C || 4 || '''Start Date'''. Little Endian.
|-
|-
| 1C90A4 || 1C90A7 || '''Const3''' Constant 4 bytes always the same.
| 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.
|}
|}


<source lang="C">
<syntaxhighlight lang="C">
  typedef struct ACF {
  typedef struct SceAcf {
     const unsigned char MAGIC;
     char magic[4];
     const int32 CONST1;
    uint8_t format_ver;
     unsigned char BYTE16;
     uint8_t format_minor_ver;
     const int32 CONST2;
    uint16_t reserved;
     unsigned char BYTE8;
     char activation_key[16];
     const int32 CONST3;
     uint32_t issue_no;  
     unsigned char BYTE64;
     uint32_t start_date;
  } ACF;
    uint32_t end_date;
</source>
     uint32_t reserved;
     char key_hash[64];
  } SceAcf;
</syntaxhighlight>
 
= RSA-2048 Signature =
 
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 =
= Example =
Structure and constant bytes are for every Dev / Test the same. Example:


* Magic bytes: red.
* Magic bytes: red.
Line 49: Line 69:
  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</span> <span style="background:#8888ff;">03 00 00 00</span> <span style="background:#00ff00;">11 55 E2 52</span> !®NÐÙ¿±......UâR
  001C9090  <span style="background:#00ff00;">21 AE 4E D0 D9 BF B1 1A 03 00 00 00 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.

Latest revision as of 07:11, 18 January 2025

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.

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 Communication Processor Box and so may be contained in the PS5 CP Box NVS.

See also PS Vita Activation AFV especially its token and 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[edit | edit source]

Total length is 0x68 bytes. It may also be 0x6C bytes for some PS4 consoles, according to zecoxao.

It is written to a 0x80-byte area in Serial Flash Non Volatile Storage bank 0 block 4 offset 0x80.

Offset Size Description
0 4 Magic. Always "acf\0" on PS4, "act\0" on PS Vita.
4 1 Format Version. Always 1 on PS4 and PS Vita.
5 1 Format Minor Version. Always 2 on PS4, 0 on PS Vita.
6 2 Reserved. Padding. Always zeroed on PS4 and PS Vita.
8 0x10 Activation Key. Likely derived from OpenPsId.
0x18 4 Issue Number. Ex: 3, 15.
0x1C 4 Start Date. Little Endian.
0x20 4 End Date. Little Endian. Usually 90 days after Start Date.
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. 
 typedef struct SceAcf {
     char magic[4];
     uint8_t format_ver;
     uint8_t format_minor_ver;
     uint16_t reserved;
     char activation_key[16];
     uint32_t issue_no; 
     uint32_t start_date;
     uint32_t end_date;
     uint32_t reserved;
     char key_hash[64];
 } SceAcf;

RSA-2048 Signature[edit | edit source]

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[edit | edit source]

  • Magic bytes: red.
  • Constant bytes: blue.
  • Unique bytes: green.
Offset(h) 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
001C9080  61 63 66 00 01 02 00 00 D6 B1 DA DE C7 82 7A A4 acf.....Ö±ÚÞÇ‚z¤
001C9090  21 AE 4E D0 D9 BF B1 1A 03 00 00 00 11 55 E2 52 !®NÐÙ¿±......UâR
001C90A0  11 FC 58 53 00 00 00 00 CC B4 CD 3A 0A F5 C0 F4 .üXS....Ì´Í:.õÀô
001C90B0  4F 04 6B C3 95 16 E6 D8 FB 0B F2 56 B0 3B BA 00 O.kÕ.æØû.òV°;º.
001C90C0  26 B0 D3 BA 55 5F B0 40 0F 54 34 22 E1 E4 DA A7 &°ÓºU_°@.T4"áäÚ§
001C90D0  D1 7D EE BC EF 03 3C 23 37 EE 10 EB F6 88 1B 85 Ñ}î¼ï.<#7î.ëöˆ.…
001C90E0  35 8F 4B F5 D5 1A C7 3D                         5.KõÕ.Ç=
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