Android Keystore Recovery


Source link: https://github.com/rsertelon/android-keystore-recovery

Note that this README is updated for the latest snapshot version. If you want to use the last release, please visit this page

Android Keystore Recovery

This project aims to solve the "password forgotten" problem for (Android) developers who happen to manage java keystore(s).

Usage

This bruteforce tool is very simple, yet efficient. It will try all password combinations matching [A-Za-z0-9]+ by default, from the shortest password, up to the solution.

  1. Download the project jar
  2. Launch the bruteforce: java -jar android-keystore-recovery-1.4.0-bundle.jar <keystore> [opts]

Options

These are the available options for AKR:

Generic options

  • -l <length> | --min-length <length> start at given length
  • -f <password> | --from <password> start at given password (in dictionary attack this is a start line number)
  • -t <password> | --to <password> stop at given password (in dictionary attack this is a end line number)
  • `-pps | --passwords-per-second Will try the given number of passwords per second (Since 1.1)
  • `-w | --wordlist path to wordlist file (example: /../../wordlist.txt)

You can use --from and --to to parallelize the brute force on several computers.

Note: If you want to resume a stopped brute force, I suggest that you take the second last tried password that was stored in $HOME/AndroidKeystoreRecovery.log. Indeed, as actor computation is asynchronous, there is no guarantee that every password before the last one were really tried by the software.

### Character set options — since 1.1

  • `-lo | --letters-only? use letters only
  • `-no | --numbers-only? use numbers only
  • `-uc | --upper-case? discards lower-case letters
  • -lc | --lower-case discards upper-case letters
  • -ec <chars> | --extra-characters <chars> add specified characters in combinations

Time needed to retrieve password

Bruteforce algorithms are not optimized at all, AKR is faster than other bruteforce tools but it will still try all password possibilities.

In our case, we try all the characters like so: A, B, ..., Z, a, b, ..., z, 0, ..., 9. This is 62 possibilites for one character of the password.

Depending on your hardware, AKR will try more or less passwords per second, this is a sample calculation with my own computer:

- AKR velocity: v = 120 000 passwords/seconds - Number of combinations for a password of length n: 62^n - Number of combinations for a 6 characters password: 56 800 235 584 - Time needed to try all these combinations: 56 800 235 584 / v = 5.5 days! - Time needed for 7 character passwords: 5.5 * 62 = 339 days! 

As you can see, brute force with a single computer can take a very long time...

You can use the -f (--from) and -t (--to) options to run AKR on different computers, to parallelize computation and try to shorten the discovery of the password.

Technical Information

This software runs on the Java Virtual Machine (JVM), so you need to have a Java Runtime Environnement (JRE) installed on your computer. If you don't have one, get it at http://java.com.

To benefit from multi-core computers, this software uses the awesome Akka actor library.

Development

  • Pull Requests: I accept every meaningful pull request that you might offer. Please add description and comments in the code :)
  • Issues: You can create issues, however, I don't know when I'll have time to fix them (will do my best!)

Licence

Copyright Romain Sertelon 2013

This software is licenced under the GNU Public Licence v3 (GPLv3), you can find it in the LICENCE file.

Resources

Change Android launcher App Icon and App Name programmatically.

A Twitter style post length counter which can be bound to an EditText and provide callbacks when hitting a max character count.

Once bound to an EditText the characters remaining will go down as the user types. If the user goes over the max limit you will get notified and the view will show how much they are over.

FlowR is a wrapper class around the Fragment Manager. It's mainly used to navigate between different fragments easily while providing a wide range of functionality. The following are the functionalities provided by the Flowr:

Easily navigate between different fragments. Ability to open fragments for result. Keeping the state of the activity correctly synced depending on the custom values specified by the fragment currently visible such as the screen orientation and navigation bar colour.

Sliding Tab Layout with color icons.

A handy set of utility for android.

SimplerRecyclerViewAdapter used to simplify the adapter structure for RecyclerView.

Features:

  • Easy to use
  • No need to create adapter (Separate java files)
  • Works with multiple view types.
  • View holders are inside Activity or Fragment, so easily call methods of activity on row click.

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