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Juniper Preshared Key encryption/decrtion in Java

This is an example how you can encrypt and decrypt your Juniper preshared keys (e.g. VPN keys) for a Junper device.

As you can see from the java source too, 99% of the source comes from the public internet: https://forums.juniper.net/t5/Junos/Password-encryption-algorithm-in-Junos/td-p/96208

Example output

Perl version used as reference:

root@halacs:/tmp/JunosCrypt# ./junos_crypt.pl 123
$9$OlGH1cyevWx-V
root@halacs:/tmp/JunosCrypt# ./junos_crypt.pl 123
$9$OCei1cyevWx-V
root@halacs:/tmp/JunosCrypt# ./junos_crypt.pl 123
$9$9MG3AO1EcyKWL
root@halacs:/tmp/JunosCrypt# ./junos_crypt.pl 123456789012345678901234567890123456789012345678901234567890
$9$8X/XdbYgoGjH2gFn9A0OdbwsJGP5Qzn/Hkp0IRSy24oJikTz3pO1CA7-dVY2fTQ3CtO1RyevIRwYoJDjO1IEevM8X7dbeKoJZUHkO1IhevNdbwgobwqmf5F3SrlMxNwYgGjH4o/CAu1IYg4oUjHqm5z3iHuO1RSy4aJD.P69ApBIzF

Java version

root@halacs:/tmp/JunosCrypt# java JuniperPassword 123
$9$IqrEreM8X-bs
root@halacs:/tmp/JunosCrypt# java JuniperPassword 123
$9$.Pz3/CtOIE
root@halacs:/tmp/JunosCrypt# java JuniperPassword 123
$9$KRbMxNVwYoZU
root@halacs:/tmp/JunosCrypt# java JuniperPassword 123456789012345678901234567890123456789012345678901234567890
$9$vvNW7-bs2aGDwsTzn/tp7-dV4aqmf5z3DjCtOBEhwY24UjP5QCp06/Lx7Nbw.PfQ69p0BhylOBdb24ZGp0O1ylevWL7-yr24oJDjp0OIylX7-ds2-dik.mTQEcSe8XdbsaGDY236/A0ObsY2JGDikm5QUDAp0BEhYg4ZHqFn/CuO5T

Cross validation

root@halacs:/tmp/JunosCrypt# java JuniperPassword 1234567890
$9$cX1yvWX7-w24x7k.fT3nvW8LVwGDiH.P
root@halacs:/tmp/JunosCrypt# ./junos_decrypt.pl '$9$cX1yvWX7-w24x7k.fT3nvW8LVwGDiH.P'

Automated cross validation

root@halacs:/tmp/JunosCrypt# ./test.sh
Length of random string: 1
Several random string will be generated with this length! Please wait!
....................................................................................................
Length of random string: 2
Several random string will be generated with this length! Please wait!
....................................................................................................
Length of random string: 3
Several random string will be generated with this length! Please wait!
....................................................................................................
Length of random string: 4
Several random string will be generated with this length! Please wait!
....................................................................................................
No mismatch found! :)

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