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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].
Found in the System Flash on offset [http://www.psdevwiki.com/ps4/Flash-Main#0x1C9080_ACF_.28Dev.2FTest.29| 0x1C9080] and only present on Dev / Test Dumps.


ACF certainly stands for Activation Code/Control/Console File/Flag.
Total length = 0x68 ~= 104 bytes.


See also [https://wiki.henkaku.xyz/vita/AFV PSVita equivalent].
There is a structure in it. It hase a Magic of 4 bytes, then there are constant 4 bytes following by unique changing 16 bytes. Then again constant 4 bytes following by unique 8 bytes and a third time, constant 4 bytes following by unique 64 bytes.


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


Total length is 0x68 bytes.
Magic Bytes == Red.


{| class="wikitable"
Constant Bytes == Blue.
|-
! From !! To !! Description
|-
| 1C9080 || 1C9083 || '''Magic''' "acf\0"
|-
| 1C9084 || 1C9087 || '''Format Version''' Constant 4 bytes. (format_ver, format_minor_ver)
|-
| 1C9088 || 1C9097 || '''Activation Key'''
|-
| 1C9098 || 1C909B || '''Issue Number'''. Ex: 3, 15.
|-
| 1C909C || 1C909F || '''Start Date''' 4 bytes. Little Endian.
|-
| 1C90A0 || 1C90A3 || '''Expire Date''' 4 bytes. Little Endian. Usually 90 days since Start Date.
|-
| 1C90A4 || 1C90A7 || '''Reserved''' Always zeroed.
|-
| 1C90A8 || 1C90E7 || '''Key_Hash''' Unique 64 bytes.
|-
|}
 
<source lang="C">
typedef struct SceAcf {
    char magic[4];
    uint32_t format_ver;
    char activation_key[16];
    uint32_t issue_no;
    uint32_t start_date;
    uint32_t expire_date;
    uint32_t reserved;
    char key_hash[64];
} SceAcf;
</source>
 
= Example =
 
Structure and constant bytes are for every Dev / Test the same. Example:


* Magic bytes: red.
Unique Bytes == Green.
* Constant bytes: blue.
* Unique bytes: green.


  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
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