org.aoju.bus.core.codec

Class Blowfish

java.lang.Object

org.aoju.bus.core.codec.Blowfish

public class Blowfish
extends Object

加解密

Since:

JDK 1.8

Version:

3.0.5

Author:

Kimi Liu

Field Summary

Fields

Modifier and Type	Field and Description
static int	MAX_LOG_ROUNDS
static int	MIN_LOG_ROUNDS

Constructor Summary

Constructors

Constructor and Description
Blowfish()
Blowfish(int strength)
Blowfish(int strength, SecureRandom random)

Method Summary

Modifier and Type	Method and Description
static boolean	checkpw(String plaintext, String hashed) Check that a plaintext password matches a previously hashed first
String	encode(CharSequence rawPassword)
static String	gensalt() Generate a salt for use with the Blowfish.hashpw() method, selecting a reasonable default for the number of hashing rounds to apply
static String	gensalt(int log_rounds) Generate a salt for use with the Blowfish.hashpw() method
static String	gensalt(int log_rounds, SecureRandom random) Generate a salt for use with the Blowfish.hashpw() method
static String	hashpw(String password, String salt) Hash a password using the OpenBSD bcrypt scheme
boolean	matches(CharSequence rawPassword, String encodedPassword)

Methods inherited from class java.lang.Object

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

Field Detail

MIN_LOG_ROUNDS

public static final int MIN_LOG_ROUNDS

See Also:

Constant Field Values

MAX_LOG_ROUNDS

public static final int MAX_LOG_ROUNDS

See Also:

Constant Field Values

Constructor Detail

Blowfish

public Blowfish()

Blowfish

public Blowfish(int strength)

Parameters:

strength - the log rounds to use, between 4 and 31

Blowfish

public Blowfish(int strength,
                SecureRandom random)

Parameters:

strength - the log rounds to use, between 4 and 31

random - the secure random instance to use

Method Detail

hashpw

public static String hashpw(String password,
                            String salt)
                     throws IllegalArgumentException

Hash a password using the OpenBSD bcrypt scheme

Parameters:

password - the password to hash

salt - the salt to hash with (perhaps generated using Blowfish.gensalt)

Returns:

the hashed password

Throws:

IllegalArgumentException - if invalid salt is passed

gensalt

public static String gensalt(int log_rounds,
                             SecureRandom random)

Generate a salt for use with the Blowfish.hashpw() method

Parameters:

log_rounds - the log2 of the number of rounds of hashing to apply - the work factor therefore increases as 2**log_rounds. Minimum 4, maximum 31.

random - an instance of SecureRandom to use

Returns:

an encoded salt value

gensalt

public static String gensalt(int log_rounds)

Generate a salt for use with the Blowfish.hashpw() method

Parameters:

log_rounds - the log2 of the number of rounds of hashing to apply - the work factor therefore increases as 2**log_rounds. Minimum 4, maximum 31.

Returns:

an encoded salt value

gensalt

public static String gensalt()

Generate a salt for use with the Blowfish.hashpw() method, selecting a reasonable default for the number of hashing rounds to apply

Returns:

an encoded salt value

checkpw

public static boolean checkpw(String plaintext,
                              String hashed)

Check that a plaintext password matches a previously hashed first

Parameters:

plaintext - the plaintext password to verify

hashed - the previously-hashed password

Returns:

true if the passwords match, false otherwise

encode

public String encode(CharSequence rawPassword)

matches

public boolean matches(CharSequence rawPassword,
                       String encodedPassword)