JarCastingcrypt4j
A Java implementation of the crypt(3) function provided in the GNU C library (glibc). This implementation supports the MD5, SHA-256, and SHA-512 variants. Additionally, it supports legacy DES by way of the Commons Codec library.
Maven Artifacts
To use crypt4j in a Maven project, simply include the following dependency in your POM. Crypt4j is available via [Maven Central] (http://search.maven.org/#search%7Cga%7C1%7Cg%3A%22org.soulwing%22).
<dependencies>
...
<dependency>
<groupId>org.soulwing</groupId>
<artifactId>crypt4j</artifactId>
<version>1.0.0</version>
</dependency>
<!-- optional: needed only if you require DES password encryption -->
<dependency>
<groupId>commons-codec</groupId>
<artifactId>commons-codec</artifactId>
<version>1.10</version>
</dependency>
...
</dependencies>
Usage
The Crypt.crypt static method provides the main entry point. The calling arguments are consistent with the crypt(3) function.
import org.soulwing.crypt4j.Crypt;
... {
// SHA-512
String sha512 = Crypt.crypt("Hello world!".toCharArray(), "$6$saltstring");
assert sha512.equals("$6$saltstring$svn8UoSVapNtMuq1ukKS4tPQd8iKwSMHWjl/O817G3uBnIFNjnQJuesI68u4OTLiBFdcbYEdFCoEOfaS35inz1");
// SHA-256
String sha256 = Crypt.crypt("Hello world!".toCharArray(), "$5$saltstring");
assert sha256.equals("$5$saltstring$5B8vYYiY.CVt1RlTTf8KbXBH3hsxY/GNooZaBBGWEc5");
// MD5
String md5 = Crypt.crypt("Hello world!".toCharArray(), "$1$saltstring");
assert md5.equals("$1$saltstri$YMyguxXMBpd2TEZ.vS/3q1");
// DES
// Requires Commons Codec
// or a NoSuchAlgorithmException will be thrown
String des = Crypt.crypt("Hello world!".toCharArray(), "saltstring");
assert des.equals("saszt8mUri4AI");
}
For simple testing you can simply run it as a jar file, passing the password and salt string as quoted command line arguments.
The resulting encrypted password string will be written to standard output.
$ java -jar crypt4j.jar 'topsecret' '$6$tRiCkYsAlT'
$6$tRiCkYsAlT$NqxbcVeBHENLGNhXmZY5EB7RZFuLHuzei..4YthS9/SQmwa81pyZBocelML3OXWhSf4ihk9L4VB0dDIdQALtv0
