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=== Generation ===
=== Generation ===


SCE provides in official PS4 SDK a tool called pc2ks that converts a passcode to a keystone.
SCE provides in official SDK a tool called pc2ks that converts a passcode to a keystone.


Below is a simple reimplementation of PS4 pc2ks in '''python3''' by SocraticBliss.
Below is a simple reimplementation of pc2ks in '''CSharp'''.
<source lang="python3">
from binascii import unhexlify as uhx
import hashlib
import hmac
import sys
 
keystone_passcode_secret = uhx('C74405F67424BA342BC1276251BBC2F555F16025B6A1B6714780DBAEC852FA2F')
keystone_ks_secret = uhx('783D6F3AE91C0E0712FCAAB7950BDE06855CF7A22DCDBDE127E9BFCBAD0FF0FE')
 
keystone = '6B657973746F6E65020001000000000000000000000000000000000000000000'
 
def main(argc, argv):
    passcode = '00000000000000000000000000000000'
 
    if argc == 2:
        if len(argv[1]) == 32:
            passcode = argv[1]
        else:
            print('\nERROR: Passcode Must Be 32 Digits!')
            sys.exit(1)
 
    print('\npasscode = %s' % passcode)
    fingerprint = hmac.new(keystone_passcode_secret, passcode.encode(encoding = 'UTF-8'), hashlib.sha256).hexdigest().upper()
    print('fingerprint = %s' % fingerprint)
    sha256hmac  = hmac.new(keystone_ks_secret, uhx(keystone + fingerprint), hashlib.sha256).hexdigest().upper()
    print('sha256hmac  = %s' % sha256hmac)
 
    print('\nkeystone\n%s\n%s\n%s' % (keystone, fingerprint, sha256hmac))
 
if __name__=='__main__':
    sys.exit(main(len(sys.argv), sys.argv))
</source>
 
Below is a simple reimplementation of PS4 pc2ks in '''CSharp'''.
<source lang="csharp">
<source lang="csharp">
public static byte [] GenerateKeystoneFile (string passcode)
public static byte [] GenerateKeystoneFile (string passcode)
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     // 6. Concat the constant bytes from point 1, the fingerprint from point 3 and the hmac from point 5
     // 6. Concat the constant bytes from point 1, the fingerprint from point 3 and the hmac from point 5
     keystone = keystone.Concat(sha256hmac).ToArray();
     keystone = keystone.Concat(sha256hmac).ToArray();


     return keystone;
     return keystone;
}
}
</source>
</source>
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