Category PS4 CFW and Hacks       Thread starter PSXHAX       Start date May 2, 2019 at 5:47 AM       9,521       31            
Following fail0verflow's PS4 Crashdumps / Kernel Dumping and PS4 Aux Hax Documentation alongside his recent PS4 Sflash0 Pack Tool, PlayStation 4 developer @SocraticBliss made available a PS4 Crash Dump Decryptor Python Script for scene devs on Twitter today.

Download: ps4_crash_dump_decryptor.py

From the Tweets below, here's what he had to say on it: "Still tweaking this somewhat, but decided to take a swing at fail0verflow's PS4 Crash Dump Decryptor script (since at this point its fairly outdated), enjoy!

Thanks goes out to notzecoxao, CelesteBlue123, and most of all fail0verflow! :)"

ps4_crash_dump_decryptor.py
Code:
#!/usr/bin/env python
'''

Crash Dump Decryptor by SocraticBliss (R)

Thanks to...
# Team FailOverflow
# CelesteBlue
# zecoxao

1) Replace  AES KEY # with the actual key
2) Replace HMAC KEY # with the actual key
3) Have orbiscore-systemcrash.orbisstate in the same directory
4) python ps4_crash_dump_decryptor.py

'''

from binascii import unhexlify as uhx, hexlify as hx
from Crypto.Cipher import AES
from Crypto.Hash import HMAC, SHA256
import struct
import sys

class Header:
    def __init__(self, f):
        __slots__ = ('VERSION', 'OPEN_PSID', 'PADDING_1', 'PADDING_2',
                     'UNKNOWN', 'STATE', 'DATA_LEN', 'PADDING_3', 'DATA_HMAC')

        # Secure Header
        self.VERSION   = struct.unpack('<I', f.read(4))[0]
        self.PSID_ENC  = struct.unpack('<16s', f.read(16))[0]
        self.PADDING_1 = struct.unpack('<I13Q', f.read(108))[0]
   
        # Padding
        self.PADDING_2 = struct.unpack('<4Q', f.read(32))[0]
   
        # Final Header
        self.UNKNOWN   = struct.unpack('<2Q', f.read(16))[0]
        self.STATE     = struct.unpack('<Q', f.read(8))[0]
        self.DATA_LEN  = struct.unpack('<Q', f.read(8))[0]
        self.PADDING_3 = struct.unpack('<2Q', f.read(16))[0]
        self.DATA_HMAC = struct.unpack('<4Q', f.read(32))[0]

KEYS = [
    ['',''],
    ['AES KEY 1','HMAC KEY 1'], # 1.01
    ['AES KEY 2','HMAC KEY 2'], # 3.55
    ['AES KEY 3','HMAC KEY 3'], # 4.05
    ['AES KEY 4','HMAC KEY 4'], # 4.07
]

def aes_ecb_encrypt(key, data):
    return AES.new(uhx(key), AES.MODE_ECB).encrypt(data)

def aes_ecb_decrypt(key, data):
    return AES.new(uhx(key), AES.MODE_ECB).decrypt(data)

def hmac_sha256(key, data):
    return HMAC.new(uhx(key), msg = data, digestmod = SHA256).digest()

# PROGRAM START
def main (argc, argv):

    # 1) Read the Header
    with open('orbiscore-systemcrash.orbisstate', 'rb') as f:
        ps = Header(f)
   
        KD = KEYS[ps.VERSION][0]
        KC = KEYS[ps.VERSION][1]
        print('\nEncrypted PSID: %s' % hx(ps.PSID_ENC).upper())
   
        PSID_DEC = aes_ecb_decrypt(KD, ps.PSID_ENC)
        print('\nPSID: %s' % hx(PSID_DEC).upper())
        
        # HMAC DIGEST
        DIGEST = hmac_sha256(KC, ps.PSID_ENC)
        print('HASH: %s' % hx(DIGEST).upper())
           
        KD = DIGEST[0x10:]
        KC = DIGEST[:0x10]
          
        print('\nAES : %s' % hx(KC).upper())
        print('HMAC: %s' % hx(KD).upper())
   
        # 2) Dump Starts Here
        f.seek(0x4000)
        DATA_ENC = f.read()

    # 3) Utilize the proper key set to decrypt the data
    IV = '0000000000000000'
    DATA = AES.new(KD, AES.MODE_CBC, IV).decrypt(DATA_ENC)

    # 4) Save the decrypted data
    with open('debug.bin', 'wb') as f:
        f.write(DATA)
   
    print('\nSaved to debug.bin')

if __name__=='__main__':
    sys.exit(main(len(sys.argv), sys.argv))
Crash Dump KeySeed
Code:
kd, kc
KEYS = [
    ['',''],
    [b'8F86DDEDCBF24A44EB6C30607AA26F76', b'4125715AAB8B78E569F512E65CA62DD3'], # 1.01-3.15
    [b'63AEF79DC49969FD8997B2F60DB65F81', b'1800A5DE2D0F0652FA5602FFADD440AA'], # 3.50-3.70
    [b'05205507B7A154E08A7A38B1897563FB', b'AD334D142EAF8B9438DB00D1D0BFF357'], # 4.00-4.05
    [b'04C1A0961BBB0CB2140361B0956AAABA', b'052D2FF3014FB38CAAF6898CB899982A'], # 4.06-4.07 (to test)
]
Sealed Key Values

Keyset 1

AES-CBC-128
Key = B5DAEFFF39E6D90ECA7DC5B029A8153E

SHA-256-HMAC
Hash = 8707960A53468D6C843B3DC9624E22AF

Keyset 2
AES-CBC-128
Key = EC0D347E2A7657471F1FC33E9E916FD4

SHA-256-HMAC
Hash = A6D6583D3217E87D9BE9BCFC4436BE4F

Keyset 3
AES-CBC-128
Key = 51D8BFB4E387FB4120F081FE33E4BE9A

SHA-256-HMAC
Hash = FFF9BDEA803B14824C61850EBB084EE9

Keyset 4
AES-CBC-128
Key = 346B5D231332AC428A44A708B1138F6D

SHA-256-HMAC
Hash = 5DC6B8D1A3A0741852A7D44268714824

Dumped with getSealedKeySecret on 5.05

PS4 Crash Dump Decryptor Python Script via SocraticBliss.jpg
 

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