org.apache.commons.codec.digest

Class Sha2Crypt

java.lang.Object

org.apache.commons.codec.digest.Sha2Crypt

public class Sha2Crypt
extends Object

SHA2-based Unix crypt implementation.

Based on the C implementation released into the Public Domain by Ulrich Drepper <drepper@redhat.com> http://www.akkadia.org/drepper/SHA-crypt.txt

Conversion to Kotlin and from there to Java in 2012 by Christian Hammers <ch@lathspell.de> and likewise put into the Public Domain.

This class is immutable and thread-safe.

Since:

1.7

Version:

$Id: Sha2Crypt.java 1744746 2016-05-20 14:19:43Z sebb $

Constructor Summary

Constructors

Constructor and Description
Sha2Crypt()

Method Summary

Modifier and Type	Method and Description
static String	sha256Crypt(byte[] keyBytes) Generates a libc crypt() compatible "$5$" hash value with random salt.
static String	sha256Crypt(byte[] keyBytes, String salt) Generates a libc6 crypt() compatible "$5$" hash value.
static String	sha512Crypt(byte[] keyBytes) Generates a libc crypt() compatible "$6$" hash value with random salt.
static String	sha512Crypt(byte[] keyBytes, String salt) Generates a libc6 crypt() compatible "$6$" hash value.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Sha2Crypt

public Sha2Crypt()

Method Detail

sha256Crypt

public static String sha256Crypt(byte[] keyBytes)

Generates a libc crypt() compatible "$5$" hash value with random salt.

See Crypt.crypt(String, String) for details.

Parameters:

keyBytes - plaintext to hash

Returns:

complete hash value

Throws:

RuntimeException - when a NoSuchAlgorithmException is caught.

sha256Crypt

public static String sha256Crypt(byte[] keyBytes,
                                 String salt)

Generates a libc6 crypt() compatible "$5$" hash value.

See Crypt.crypt(String, String) for details.

Parameters:

keyBytes - plaintext to hash

salt - real salt value without prefix or "rounds="

Returns:

complete hash value including salt

Throws:

IllegalArgumentException - if the salt does not match the allowed pattern

RuntimeException - when a NoSuchAlgorithmException is caught.

sha512Crypt

public static String sha512Crypt(byte[] keyBytes)

Generates a libc crypt() compatible "$6$" hash value with random salt.

See Crypt.crypt(String, String) for details.

Parameters:

keyBytes - plaintext to hash

Returns:

complete hash value

Throws:

RuntimeException - when a NoSuchAlgorithmException is caught.

sha512Crypt

public static String sha512Crypt(byte[] keyBytes,
                                 String salt)

Generates a libc6 crypt() compatible "$6$" hash value.

See Crypt.crypt(String, String) for details.

Parameters:

keyBytes - plaintext to hash

salt - real salt value without prefix or "rounds="

Returns:

complete hash value including salt

Throws:

IllegalArgumentException - if the salt does not match the allowed pattern

RuntimeException - when a NoSuchAlgorithmException is caught.