cn.ponfee.commons.jce.passwd

类 BCrypt

java.lang.Object

cn.ponfee.commons.jce.passwd.BCrypt

public final class BCrypt
extends Object

BCrypt implements OpenBSD-style Blowfish password hashing using the scheme described in "A Future-Adaptable Password Scheme" by Niels Provos and David Mazieres.

This password hashing system tries to thwart off-line password cracking using a computationally-intensive hashing algorithm, based on Bruce Schneier's Blowfish cipher. The work factor of the algorithm is parameterised, so it can be increased as computers get faster.

Maven position： de.svenkubiak jBCrypt 0.4.1 http://www.mindrot.org/projects/jBCrypt/#download https://en.m.wikipedia.org/wiki/Bcrypt $1$: MD5 $2$: Bcrypt $sha1$: SHA-1 $5$: SHA-256 $6$: SHA-512 Crypt Crypt

版本:

0.5 Reference from internet and with optimization

作者:

Damien Miller

方法概要

限定符和类型	方法和说明
static boolean	check(byte[] passwd, String hashed) Check that a plaintext password matches a previously hashed one
static boolean	check(String passwd, String hashed)
static String	create(byte[] passwd)
static String	create(byte[] passwd, int logrounds) Hash a password using the OpenBSD bcrypt scheme
static String	create(String passwd)
static String	create(String passwd, int logrounds)
static byte[]	crypt(byte[] passwd, byte[] salt, int logrounds)
static byte[]	crypt(byte[] passwd, byte[] salt, int logrounds, int[] cdata) Perform the central password hashing step in the bcrypt scheme

从类继承的方法 java.lang.Object

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

方法详细资料

create

public static String create(String passwd)

create

public static String create(byte[] passwd)

create

public static String create(String passwd,
                            int logrounds)

create

public static String create(byte[] passwd,
                            int logrounds)

Hash a password using the OpenBSD bcrypt scheme

参数:

passwd - the password to hash

logrounds - the binary logarithm of the number Math.pow(2,logrounds)

返回:

the hashed password (fixed 62 length string)

check

public static boolean check(String passwd,
                            String hashed)

check

public static boolean check(byte[] passwd,
                            String hashed)

Check that a plaintext password matches a previously hashed one

参数:

passwd - the plaintext password to verify

hashed - the previously-hashed password

返回:

true if the passwords match, false otherwise

crypt

public static byte[] crypt(byte[] passwd,
                           byte[] salt,
                           int logrounds)

crypt

public static byte[] crypt(byte[] passwd,
                           byte[] salt,
                           int logrounds,
                           int[] cdata)

Perform the central password hashing step in the bcrypt scheme

参数:

passwd - the password to hash

salt - the binary salt to hash with the password

logrounds - the binary logarithm of the number of rounds for hashing to apply

cdata - the plaintext to encrypt

返回:

an array containing the binary hashed password