Kirk: Difference between revisions

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(Created page with "The PSP KIRK Crypto Engine is a security hardware device that is embedded into the TACHYON main IC chip. It is a bus master and can DMA to/from main DDR RAM memory, operating...")
 
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On PSP there are 18 KIRK commands. On PSVita, there are these 18 commands plus some new commands to support bigger keys (192 bits for example). See [https://wiki.henkaku.xyz/vita/F00D_Commands#gcauthmgr_sm.self F00D commands].
On PSP there are 18 KIRK commands. On PSVita, there are these 18 commands plus some new commands to support bigger keys (192 bits for example). See [https://wiki.henkaku.xyz/vita/F00D_Commands#gcauthmgr_sm.self F00D commands].
== Table ==


{| class="wikitable"
{| class="wikitable"
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! scope="col"| Name
! scope="col"| Name
! scope="col"| Short description
! scope="col"| Short description
! scope="col"| Input
! scope="col"| Input size
! scope="col"| Output
! scope="col"| Output size
! scope="col"| Result
! scope="col"| Result
! scope="col"| Used in
! scope="col"| Used in
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|  
|  
| Super-Duper decryption (no inverse)
| Super-Duper decryption (no inverse)
| Input size: size+0x40
| buf_size+0x40
|  
| buf_size
|  
|  
| memlmd, mesg_led
| memlmd, mesg_led
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|  
|  
| Encrypt Operation (inverse of cmd 7) (IV=0)
| Encrypt Operation (inverse of cmd 7) (IV=0)
| Input size: size+0x14
| buf_size+0x14
|  
| buf_size+0x14
|  
|  
| chnnlsv, memab
| chnnlsv, memab
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|  
|  
| Encrypt Operation (inverse of cmd 8) (IV=FuseID)
| Encrypt Operation (inverse of cmd 8) (IV=FuseID)
| Input size: size+0x14
| buf_size+0x14
|  
| buf_size+0x14
|  
|  
| chnnlsv
| chnnlsv
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|  
|  
| Decrypt Operation (inverse of cmd 4) (IV=0)
| Decrypt Operation (inverse of cmd 4) (IV=0)
| Input size: size+0x14
| buf_size+0x14
|  
| buf_size+0x14
|  
|  
| memlmd, mesg_led,chnnlsv, memab
| memlmd, mesg_led,chnnlsv, memab
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|  
|  
| Decrypt Operation (inverse of cmd 5) (IV=FuseID)
| Decrypt Operation (inverse of cmd 5) (IV=FuseID)
| Input size: size+0x14
| buf_size+0x14
|  
| buf_size+0x14
|  
|  
| chnnlsv
| chnnlsv
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|  
|  
| SHA1 Hash
| SHA1 Hash
| Input size: size
| buf_size >= 0x14
|  
| ?buf_size?
|  
|  
| memlmd, mesg_led, memab
| memlmd, mesg_led, memab
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|  
|  
| Mul1
| Mul1
| Input size: 0
| 0
|  
| 0x3C
|  
|  
| memab
| memab
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|  
|  
| Mul2
| Mul2
| Input size: 0x3C
| 0x3C
|  
| 0x3C
|  
|  
|  
|  
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|  
|  
| Pseudo Random Number Generation
| Pseudo Random Number Generation
| Input size: 0
| 0
|  
| 0x14
|  
|  
| mesg_led,chnnlsv,memab,semawm
| mesg_led, chnnlsv, memab, semawm
|-
|-
| 15 (0xF)
| 15 (0xF)
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|  
|  
| Signature Generation
| Signature Generation
| Input size: 0x34
| 0x34
|  
| 0x34
|  
|  
| memab
| memab
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|  
|  
| Signature Check (checks for generated sigs)
| Signature Check (checks for generated sigs)
| Input size: 0x64
| 0x64
|  
| 0
|  
|  
| memab
| memab
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| 18 (0x12)
| 18 (0x12)
|  
|  
| Certificate Check (idstorage signatures)
| Certificate Check (IDStorage certificates signatures and digests)
| Input size: 0xB8
| 0xB8
|  
| 0
|  
|  
| openpsid, memab
| openpsid, memab
|}
|}
== Command 1 ==
=== Usages ===
=== Algorithm ===
=== Vulnerabilities ===
== Command 2 ==
== Command 3 ==
== Command 4 ==
== Command 5 ==
== Command 6 ==
== Command 7 ==
== Command 8 ==
== Command 9 ==
== Command 10 ==
== Command 11 ==
== Command 12 ==
== Command 13 ==
== Command 14 ==
== Command 15 ==
== Command 16 ==
== Command 17 ==
== Command 18 ==


= Library =
= Library =

Revision as of 00:04, 26 February 2020

The PSP KIRK Crypto Engine is a security hardware device that is embedded into the TACHYON main IC chip. It is a bus master and can DMA to/from main DDR RAM memory, operating independantly of the CPU. It is intefaced via memory mapped registers at base of 0xBDE00000 ([SPOCK Crypto Engine] on the other hand is mapped to 0xBDF00000). It is capable of performing AES encryption, decryption, SHA1 Hash, pseudo random number generation, and signature checks (OMAC and ECDSA).

Commands

On PSP there are 18 KIRK commands. On PSVita, there are these 18 commands plus some new commands to support bigger keys (192 bits for example). See F00D commands.

Table

Command ID Name Short description Input size Output size Result Used in
1 Super-Duper decryption (no inverse) buf_size+0x40 buf_size memlmd, mesg_led
2 Encrypt Operation (inverse of cmd 3)
3 Decrypt Operation (inverse of cmd 2)
4 Encrypt Operation (inverse of cmd 7) (IV=0) buf_size+0x14 buf_size+0x14 chnnlsv, memab
5 Encrypt Operation (inverse of cmd 8) (IV=FuseID) buf_size+0x14 buf_size+0x14 chnnlsv
6 Encrypt Operation (inverse of cmd 9) (IV=UserDefined)
7 Decrypt Operation (inverse of cmd 4) (IV=0) buf_size+0x14 buf_size+0x14 memlmd, mesg_led,chnnlsv, memab
8 Decrypt Operation (inverse of cmd 5) (IV=FuseID) buf_size+0x14 buf_size+0x14 chnnlsv
9 Decrypt Operation (inverse of cmd 6) (IV=UserDefined)
10 (0xA) Private Signature Check (checks for private SCE sig)
11 (0xB) SHA1 Hash buf_size >= 0x14 ?buf_size? memlmd, mesg_led, memab
12 (0xC) Mul1 0 0x3C memab
13 (0xD) Mul2 0x3C 0x3C
14 (0xE) Pseudo Random Number Generation 0 0x14 mesg_led, chnnlsv, memab, semawm
15 (0xF) (absolutely no idea – could be KIRK initialization)
16 (0x10) Signature Generation 0x34 0x34 memab
17 (0x11) Signature Check (checks for generated sigs) 0x64 0 memab
18 (0x12) Certificate Check (IDStorage certificates signatures and digests) 0xB8 0 openpsid, memab

Command 1

Usages

Algorithm

Vulnerabilities

Command 2

Command 3

Command 4

Command 5

Command 6

Command 7

Command 8

Command 9

Command 10

Command 11

Command 12

Command 13

Command 14

Command 15

Command 16

Command 17

Command 18

Library

Calling commands using KIRK registers

Notes

In 2008 SilverSpring wrote: 

Currently what is known about the cipher is that it is:
a block cipher operating in CBC mode
an all zero 128-bit initialization vector
128-bit block and key sizes
cmd4/7 uses a static key that is identical in all PSP’s
cmd5/8 uses a key based off the fuseID making all operations unique per PSP
cmd6/9 uses a user-defined 128-bit key
cmd1/2/3 uses the block cipher but also signature algorithms
the remaining KIRK cmd’s do not use the block cipher (sig, hash, & prng algo’s)
</source>
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