zxcv-java-wrapper

Wraps the zxcvbn JavaScript implementation for use on the JVM.

This is not a port of zxcvbn, hence the "wrapper" terminology. It does not re-implement anything in Java, it executes the original JavaScript directly using the Java Scripting API.

Usage

Java:

Zxcvbn zxcvbn = new Zxcvbn(); // This instance should be stored and reused.
Zxcvbn.Result result = zxcvbn.apply("password");

Zxcvbn implements the java.util.function.Function interface. It can be used in higher order functions such as the ones found in java.util.stream.

Dependency

Gradle:

repositories {
    maven {
        url 'https://raw.github.com/chilloutman/zxcvbn-java-wrapper/master/repo/'
    }
}
dependencies {
    compile "ch.neiva:zxcvbn-java-wrapper:${zxcvbnVersion}"
}

Benchmark

Calling zxcvbn takes less than 10 ms. Creating an instance of Zxcvbn however, takes several seconds. The instance should therefore be reused.

To run the benchmark use the run gradle task:

./gradlew run

Benched creation Zxcvbn instances
Number of creations in 20 seconds: 5
Average time [ms]: 4000.000

Benched password: password
Result: {guesses=3, guessesLog10=0.47712125471966244, crackTimesSeconds={offline_slow_hashing_1e4_per_second=3.0E-4, offline_fast_hashing_1e10_per_second=3.0E-10, online_throttling_100_per_hour=108.0, online_no_throttling_10_per_second=0.3}, crackTimesDisplay={offline_slow_hashing_1e4_per_second=less than a second, offline_fast_hashing_1e10_per_second=less than a second, online_throttling_100_per_hour=2 minutes, online_no_throttling_10_per_second=less than a second}, score=0, feedbackWarning=This is a top-10 common password, feedbackSuggestions={0=Add another word or two. Uncommon words are better.}, sequence={0=[object Object]}, calcTime=0.0}
Number of executions in 10 seconds: 38828
Average time [ms]: 0.258

Benched password: 8f01071b-cd21-4590-ad96-2139d88bd03c
Result: {guesses=1.0E36, guessesLog10=35.99999999999999, crackTimesSeconds={offline_slow_hashing_1e4_per_second=1.0E32, offline_fast_hashing_1e10_per_second=1.0E26, online_throttling_100_per_hour=3.6000000000000004E37, online_no_throttling_10_per_second=1.0E35}, crackTimesDisplay={offline_slow_hashing_1e4_per_second=centuries, offline_fast_hashing_1e10_per_second=centuries, online_throttling_100_per_hour=centuries, online_no_throttling_10_per_second=centuries}, score=4, feedbackWarning=, feedbackSuggestions={}, sequence={0=[object Object]}, calcTime=6.0}
Number of executions in 10 seconds: 1306
Average time [ms]: 7.657

(java version "1.8.0_131", Intel(R) Core(TM) i7-4771 CPU @ 3.50GHz, macOS Sierra 10.12.5)