Cracker di chiave privata JKS - Chiodo nella bara JKS

Il Java Key Store (JKS) è il modo Java di archiviare una o più chiavi crittografiche private e pubbliche per la crittografia asimmetrica in un file. Sebbene esistano vari formati di key store, Java e Android utilizzano ancora il formato file JKS come predefinito. JKS è uno dei formati di file per i key store Java, ma JKS è usato in modo confuso anche come acronimo per l'API generale dei key store Java. Questo progetto include informazioni sui meccanismi di sicurezza del formato file JKS e su come la protezione tramite password della chiave privata possa essere craccata. A causa dell'insolita progettazione di JKS, l'implementazione sviluppata può ignorare la password del key store e craccare direttamente la password della chiave privata. Poiché ignora la password del key store, questa implementazione può attaccare qualsiasi configurazione JKS, cosa che non accade con la maggior parte degli altri strumenti. Sfruttando una debolezza dello schema di cifratura basata su password per la chiave privata in JKS, le password possono essere craccate molto efficientemente. Fino ad ora, nessuno strumento pubblico sfruttava questa debolezza. Questa tecnica è stata implementata in hashcat per amplificare l'efficienza dell'algoritmo con velocità di cracking più elevate sulle GPU.

Per la parte teorica, si prega di fare riferimento all'articolo POC||GTFO "15:12 Nail in the Java Key Store Coffin" nel numero 0x15 incluso in questo repository (pocorgtfo15.pdf) o disponibile su vari mirror come questo bellissimo: https://unpack.debug.su/pocorgtfo/

Prima che lo chiediate: JCEKS, BKS o qualsiasi altro formato di Key Store non è supportato (ancora).

Come dovresti craccare i file JKS

La risposta è costruire il proprio hardware per il cracking ;) . Ma cerchiamo di essere un po' più pratici, quindi la risposta è usare la tua GPU:``` : _____________ : v3.6.0 ____________ _\ |_ /___ \ |____ _ / ______ | _ | __ \ / _ | /_ __ |/ | | | \ ___ / | | \ / \ | | || |__/ / /| |/: | |_:-aTZ!/_/ |: /__:

• BLAKE2 * BLOCKCHAIN2 * DPAPI * CHACHA20 * JAVA KEYSTORE * ETHEREUM WALLET *

Tutto ciò che devi fare è eseguire il seguente comando:```
java -jar JksPrivkPrepare.jar your_JKS_file.jks > hash.txt

Se il tuo hash.txt risulta vuoto, significa che non c'è una chiave privata nel file JKS o hai specificato un file non JKS.

Quindi fornisci il file hash.txt a hashcat (versione 3.6.0 e successive, ma se vuoi essere sicuro e anche assicurarti di poter decifrare password molto lunghe, usa almeno la versione 4 di hashcat!), ad esempio in questo modo:``` $ ./hashcat -m 15500 -a 3 -1 '?u|' -w 3 hash.txt ?1?1?1?1?1?1?1?1?1 hashcat (v3.6.0) starting...

OpenCL Platform #1: NVIDIA Corporation

• Device #1: GeForce GTX 1080, 2026/8107 MB allocatable, 20MCU

Hashes: 1 digests; 1 unique digests, 1 unique salts Bitmaps: 16 bits, 65536 entries, 0x0000ffff mask, 262144 bytes, 5/13 rotates

Applicable optimizers:

• Zero-Byte
• Precompute-Init
• Not-Iterated
• Appended-Salt
• Single-Hash
• Single-Salt
• Brute-Force

Watchdog: Temperature abort trigger set to 90c Watchdog: Temperature retain trigger set to 75c

$jksprivk$D1BC102EF5FE5F1A7ED6A63431767DD4E1569670...8test:POC||GTFO

Session..........: hashcat Status...........: Cracked Hash.Type........: JKS Java Key Store Private Keys (SHA1) Hash.Target......: $jksprivk$D1BC102EF5FE5F1A7ED6A63431767DD4E1569670...8test Time.Started.....: Tue May 30 17:41:58 2017 (8 mins, 25 secs) Time.Estimated...: Tue May 30 17:50:23 2017 (0 secs) Guess.Mask.......: ?1?1?1?1?1?1?1?1?1 [9] Guess.Charset....: -1 ?u|, -2 Undefined, -3 Undefined, -4 Undefined Guess.Queue......: 1/1 (100.00%) Speed.Dev.#1.....: 7946.6 MH/s (39.48ms) Recovered........: 1/1 (100.00%) Digests, 1/1 (100.00%) Salts Progress.........: 4014116700160/7625597484987 (52.64%) Rejected.........: 0/4014116700160 (0.00%) Restore.Point....: 5505024000/10460353203 (52.63%) Candidates.#1....: NNVGFSRFO -> Z|ZFVDUFO HWMon.Dev.#1.....: Temp: 75c Fan: 89% Util:100% Core:1936MHz Mem:4513MHz Bus:1

Started: Tue May 30 17:41:56 2017 Stopped: Tue May 30 17:50:24 2017

Quindi da questo repository ti serve essenzialmente solo il file JksPrivkPrepare.jar per eseguire una sessione di cracking.

# Dal formato di John The Ripper al formato di hashcat

Queste informazioni sono importanti solo per i giocatori di CTF o per i partecipanti a competizioni di hash cracking. Nella vita reale, dovresti avere accesso al file JKS e utilizzare semplicemente JksPrivkPrepare.jar. Tuttavia, quando ti trovi di fronte a una sfida artificiale, a volte ottieni solo il formato hash di "John the Ripper" da `keystore2john.py`. Ti spiegherò come passare dal formato "John" al file JKS originale (sì, l'intero file è nel formato hash di john). Diamo un'occhiata a un esempio:```
$ python2 keystore2john.py JKS-private-key-cracker-hashcat/example_jks/androidstudio_default_123456.jks 
androidstudio_default_123456.jks:$keystore$0$2033$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$44f13fd07f8bd5fb219aac5578081d72cfc89272$1$1280$308204fc300e060a2b060104012a021101010500048204e84e2fffc6379d0fb4a70a86dd0d0d7e08fad4422a99cf6280ce973cc53c0864e90cf94d889e03a8fbf76520e60cfad58059704850946691f089df5324c5226b86f4f3ef0a48d5d347adfb7917e41a3fd3baf3d4f777443444c605b4cc176788511ccc7534dd07a9d9da8e4dff6b3eeb17b7e17b821b9d834e936658c0db85d9bd295d36f4c62df72b4c1bcd0555110a3807a7b371caf4ff22afb781e858cf19f4519aa03efe92f6534c7dbdd8849f937deb9be54adc86b2f143e7707aba55c4d8a0809db2fa60d88b18949f89126c4e27a26a365290f2dcc6884d5e4c55ce2a404ea49d00135d09643b958c2de3ad20717bcdb396378bddd7d3001bfd38e28b365402fdff855c0b1cad20ddaf58c574ceff2b25b2a38d9a2b099136a766fef0aeca613791f2691ec7e4d2ff2d085db93a123585686802d7ccc1235788d96e693921cf136146952a8da51f4fbf15d840c40ee2131350393ea2533aa0c42a1d91154e85d495cdc9c326c8f3d8579ef0363f98b2bdcb95b0c586b692f4f3c4ebd3b49bebbccb20bc104c272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Dovrai estrarre la parte che inizia con "feedfeed" e la parte successiva (44f13fd07f8bd5fb219aac5578081d72cfc89272) dal formato john, concatenarle tra loro (in questo ordine), decodificarle in esadecimale e salvarle in un file. Quindi per l'esempio sopra:``` $ python2

f = file("original_jks_file.jks","wb") a = "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" b = "44f13fd07f8bd5fb219aac5578081d72cfc89272" c = a + b f.write(c.decode("hex")) f.close()

Ora puoi usare JksPrivkPrepare.jar sul file original_jks_file.jks che hai appena creato, proprio come faresti con qualsiasi file JKS:```
$ java -jar JksPrivkPrepare.jar original_jks_file.jks 
Alias: myalias, algorithm: RSA, keysize or field size: 2048
$jksprivk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myalias

Altre cose in questo repository

• test_run.sh: Un piccolo script di test che dovresti essere in grado di eseguire dopo un paio di minuti per vedere questo progetto in azione. Include commenti su come configurare le dipendenze per questo progetto.
• benchmarking: test che mostrano perché dovresti usare questa tecnica e non altre. Si prega di leggere l'articolo "Nail in the JKS coffin".
• example_jks: genera file JKS di esempio
• fingerprint_creation: Ogni chiave privata in chiaro in PKCS#8 ha la propria "impronta digitale" che ci aspettiamo quando indoviniamo la password corretta. Queste impronte digitali sono necessarie per assicurarci di poter rilevare quando abbiamo indovinato la password corretta. Si prega di leggere l'articolo "Nail in the JKS coffin". Questa cartella contiene il codice per generare queste impronte digitali, è un po' rozzo ma non prevedo che sarà necessario aggiungere altre impronte digitali in futuro.
• JksPrivkPrepare: Il codice sorgente di come vengono letti i file JKS e calcolato l'hash che dobbiamo fornire a hashcat.
• jksprivk_crack.py: Un'implementazione proof of concept che può essere utilizzata al posto di hashcat. Ovviamente è molto più lenta di hashcat, ma può superare John the Ripper (JtR) in alcuni casi. Si prega di leggere l'articolo "Nail in the JKS coffin".
• jksprivk_decrypt.py: Un piccolo script di supporto che può essere utilizzato per estrarre una chiave privata una volta indovinata correttamente la password.
• run_example_jks.sh: Uno script che esegue JksPrivkPrepare.jar e jksprivk_crack.py su tutti i file JKS di esempio nella cartella example_jks. Assicurati di eseguire prima lo script generate_examples.py in example_jks.

Lavori correlati e ulteriori collegamenti

Un grande ringraziamento a Casey Marshall che ha scritto la classe JKS.java, utilizzata in una versione modificata in questo progetto:``` /* JKS.java -- implementation of the "JKS" key store. Copyright (C) 2003 Casey Marshall [email protected]

Permission to use, copy, modify, distribute, and sell this software and its documentation for any purpose is hereby granted without fee, provided that the above copyright notice appear in all copies and that both that copyright notice and this permission notice appear in supporting documentation. No representations are made about the suitability of this software for any purpose. It is provided "as is" without express or implied warranty.

This program was derived by reverse-engineering Sun's own implementation, using only the public API that is available in the 1.4.1 JDK. Hence nothing in this program is, or is derived from, anything copyrighted by Sun Microsystems. While the "Binary Evaluation License Agreement" that the JDK is licensed under contains blanket statements that forbid reverse-engineering (among other things), it is my position that US copyright law does not and cannot forbid reverse-engineering of software to produce a compatible implementation. There are, in fact, numerous clauses in copyright law that specifically allow reverse-engineering, and therefore I believe it is outside of Sun's power to enforce restrictions on reverse-engineering of their software, and it is irresponsible for them to claim they can. */

Varie ulteriori informazioni menzionate anche nell'articolo:

* JKS is going to be replace as the default type in Java 9 http://openjdk.java.net/jeps/229
* https://gist.github.com/zach-klippenstein/4631307 
* http://www.openwall.com/lists/john-users/2015/06/07/3
* https://github.com/bes/KeystoreBrute
* https://github.com/jeffers102/KeystoreCracker
* https://github.com/volure/keystoreBrute
* https://gist.github.com/robinp/2143870 
* https://www.darknet.org.uk/2015/06/patator-multi-threaded-service-url-brute-forcing-tool/
* https://github.com/rsertelon/android-keystore-recovery
* https://github.com/MaxCamillo/android-keystore-password-recover
* https://cryptosense.com/mighty-aphrodite-dark-secrets-of-the-java-keystore/
* https://hashcat.net/events/p12/js-sha1exp_169.pdf
* https://github.com/hashcat/hashcat

Saluti cordiali vanno a atom, vollkorn, cem, doegox, corkami, xonox e rexploit per aver supportato questa ricerca in una forma o nell'altra!