Editing PRX File Format

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= PRX Types & Tags =
= Sony PSP PRX types & tags =
Reversed by Linblow


Extracted from the mesg_led_02g kernel module (firmware<code>6.61</code>model <code>02g</code>).
* Reversed by Linblow
 
</pre>
Firmware: 6.61
Model: 02g
PSP header v1 (0/1/8)


=== PSP header v1 (0/1/8) ===
Use PSP header structure v1.
Use PSP header structure v1.
Primary key size: 144 bytes.
Secondary key size: none.
Secure ID: none.


Primary key size: <code>144</code> bytes.
     Type 0: 03000000 (mode: 4 USER_MODULE)
 
No secondary key, and no secure ID.
 
     Type 0: 03000000 (mode: 4 USER_MODULE)
     Type 0: 04000000 (mode: 5)
     Type 0: 04000000 (mode: 5)
     Type 0: 05000000 (mode: 6)
     Type 0: 05000000 (mode: 6)
     Type 0: 06000000 (mode: 7 PSAR_DEVTOOL)
     Type 0: 06000000 (mode: 7 PSAR_DEVTOOL)
     Type 0: 08000000 (mode: 9 UMD_GAME_EXEC)
     Type 0: 08000000 (mode: 9 UMD_GAME_EXEC)
     Type 0: 09000000 (mode: 10 GAMESHARING_EXEC)
     Type 0: 09000000 (mode: 10 GAMESHARING_EXEC)
     Type 0: 0A000000 (mode: 11 GAMESHARING_EXEC_DEVTOOL)
     Type 0: 0A000000 (mode: 11 GAMESHARING_EXEC_DEVTOOL)
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     Type 0: 0E000000 (mode: 15 PSAR_RETAIL)
     Type 0: 0E000000 (mode: 15 PSAR_RETAIL)
     Type 0: 0F000000 (mode: 16 ME_IMAGE)
     Type 0: 0F000000 (mode: 16 ME_IMAGE)
     Type 1: 3ACE4DCE (mode: 4 USER_MODULE)
     Type 1: 3ACE4DCE (mode: 4 USER_MODULE)
     Type 1: C0CB167C (mode: 9 UMD_GAME_EXEC)
     Type 1: C0CB167C (mode: 9 UMD_GAME_EXEC)
     Type 1: BB67C59F (mode: 10 GAMESHARING_EXEC)
     Type 1: BB67C59F (mode: 10 GAMESHARING_EXEC)
     Type 1: 7F24BDCD (mode: 13 DEMO_EXEC)
     Type 1: 7F24BDCD (mode: 13 DEMO_EXEC)
     Type 1: 1BC8D12B (mode: 14 APP_MODULE)
     Type 1: 1BC8D12B (mode: 14 APP_MODULE)
     Type 1: 862648D1 (mode: 16 ME_IMAGE)
     Type 1: 862648D1 (mode: 16 ME_IMAGE)
     Type 8: 02000000 (mode: 3 VSH_MODULE)
     Type 8: 02000000 (mode: 3 VSH_MODULE)
     Type 8: 0B000000 (mode: 12 MS_UPDATER)
     Type 8: 0B000000 (mode: 12 MS_UPDATER)


=== PSP header v2 ===
PSP header v2
 
Use PSP header structure v2.
Use PSP header structure v2.
Primary key size: 16 bytes.
Secondary key size: 16 bytes.
Secure ID: type-dependent.
Type 2/4/6/9 (no secure ID)


Primary key size: <code>16</code> bytes.
     Type 2: 457B05F0 (mode: 4 USER_MODULE)
 
     Type 2: 457B06F0 (mode: 4 USER_MODULE)
Secondary key size: <code>16</code> bytes.
     Type 2: 457B08F0 (mode: 4 USER_MODULE)
 
     Type 2: 457B0AF0 (mode: 4 USER_MODULE)
Secure ID: type-dependent, <code>16</code> bytes.
     Type 2: 457B0BF0 (mode: 4 USER_MODULE)
 
     Type 2: 457B0CF0 (mode: 4 USER_MODULE)
==== Type 2/4/6/9 (no secure ID) ====
     Type 2: 457B10F0 (mode: 4 USER_MODULE)
     Type 2: 457B05F0 (mode: 4 USER_MODULE)
     Type 2: 76202403 (mode: 4 USER_MODULE)
     Type 2: 457B06F0 (mode: 4 USER_MODULE)
     Type 2: 457B08F0 (mode: 4 USER_MODULE)
     Type 2: 457B0AF0 (mode: 4 USER_MODULE)
     Type 2: 457B0BF0 (mode: 4 USER_MODULE)
     Type 2: 457B0CF0 (mode: 4 USER_MODULE)
     Type 2: 457B10F0 (mode: 4 USER_MODULE)
     Type 2: 76202403 (mode: 4 USER_MODULE)
     Type 2: 628910F0 (mode: 5)
     Type 2: 628910F0 (mode: 5)
     Type 2: 8B9B10F0 (mode: 6)
     Type 2: 8B9B10F0 (mode: 6)
     Type 2: 5A5C10F0 (mode: 7 PSAR_DEVTOOL)
     Type 2: 5A5C10F0 (mode: 7 PSAR_DEVTOOL)
     Type 2: E42C2303 (mode: 7 PSAR_DEVTOOL)
     Type 2: E42C2303 (mode: 7 PSAR_DEVTOOL)
     Type 2: 8004FD03 (mode: 9 UMD_GAME_EXEC)
     Type 2: 8004FD03 (mode: 9 UMD_GAME_EXEC)
     Type 2: D91605F0 (mode: 9 UMD_GAME_EXEC)
     Type 2: D91605F0 (mode: 9 UMD_GAME_EXEC)
     Type 2: D91606F0 (mode: 9 UMD_GAME_EXEC)
     Type 2: D91606F0 (mode: 9 UMD_GAME_EXEC)
     Type 2: D9160AF0 (mode: 9 UMD_GAME_EXEC)
     Type 2: D9160AF0 (mode: 9 UMD_GAME_EXEC)
     Type 2: D9160BF0 (mode: 9 UMD_GAME_EXEC)
     Type 2: D9160BF0 (mode: 9 UMD_GAME_EXEC)
     Type 2: D91610F0 (mode: 9 UMD_GAME_EXEC)
     Type 2: D91610F0 (mode: 9 UMD_GAME_EXEC)
    Type 2: D91611F0 (mode: 9  UMD_GAME_EXEC) <ref name="resmgr">Resmgr tag '''and''' key ''can'' be overwritten via the game's <code>OPNSSMP.BIN</code> program</ref>
     Type 2: 0A35EA03 (mode: 10 GAMESHARING_EXEC)
     Type 2: 0A35EA03 (mode: 10 GAMESHARING_EXEC)
     Type 2: 7B0505F0 (mode: 10 GAMESHARING_EXEC)
     Type 2: 7B0505F0 (mode: 10 GAMESHARING_EXEC)
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     Type 4: 279D08F0 (mode: 14 APP_MODULE)
     Type 4: 279D08F0 (mode: 14 APP_MODULE)
     Type 4: 279D10F0 (mode: 14 APP_MODULE)
     Type 4: 279D10F0 (mode: 14 APP_MODULE)
     Type 6: 457B80F0 (mode: 4 USER_MODULE)
     Type 6: 457B80F0 (mode: 4 USER_MODULE)
     Type 6: 457B8AF0 (mode: 4 USER_MODULE)
     Type 6: 457B8AF0 (mode: 4 USER_MODULE)
    Type 6: D91680F0 (mode: 9  UMD_GAME_EXEC) <ref name="resmgr" />
     Type 9: 380290F0 (mode: 3 VSH_MODULE)
     Type 9: 380290F0 (mode: 3 VSH_MODULE)
     Type 9: 380291F0 (mode: 3 VSH_MODULE)
     Type 9: 380291F0 (mode: 3 VSH_MODULE)
     Type 9: 457B90F0 (mode: 4 USER_MODULE)
     Type 9: 457B90F0 (mode: 4 USER_MODULE)
     Type 9: 457B91F0 (mode: 4 USER_MODULE)
     Type 9: 457B91F0 (mode: 4 USER_MODULE)
     Type 9: 0B2B91F0 (mode: 8)
     Type 9: 0B2B91F0 (mode: 8 VSH_INDEX_DAT)
 
    Type 9: D91690F0 (mode: 9  UMD_GAME_EXEC) <ref name="resmgr" />
Type 3/5/7/10 (optional secure ID)


==== Type 3/5/7/10 (optional secure ID) ====
     Type 3: 89742B04 (mode: 18 MS_DNAS_DRMBB)
     Type 3: 89742B04 (mode: 18 MS_DNAS_DRMBB)
     Type 3: E92408F0 (mode: 18 MS_DNAS_DRMBB)
     Type 3: E92408F0 (mode: 18 MS_DNAS_DRMBB)
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     Type 5: 407810F0 (mode: 23)
     Type 5: 407810F0 (mode: 23)
     Type 5: 2E5E10F0 (mode: 25 MS_BOOT_PATCH)
     Type 5: 2E5E10F0 (mode: 25 MS_BOOT_PATCH)
    Type 5: 2E5E11F0 (mode: 25 MS_BOOT_PATCH) <ref name="resmgr" />
</pre>
    Type 7: 2E5E80F0 (mode: 25 MS_BOOT_PATCH) <ref name="resmgr" />
    Type 10: 2E5E90F0(mode: 25 MS_BOOT_PATCH) <ref name="resmgr" />
 
==== Notes ====
PRX type 9 and 10 also have an early ECDSA signature check in the decryption routine (mesg_led).
 
The [[Keys#PRX_type_9_and_10_Keys|public key used for the signature check]] depends on the PRX tag.
 
Since the corresponding ECDSA private keys are unknown, we cannot create legit type 9/10 PRX.
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