org.aoju.bus.crypto.digest

Class BCrypt

java.lang.Object

org.aoju.bus.crypto.digest.BCrypt

public class BCrypt
extends Object

BCrypt加密算法实现 由它加密的文件可在所有支持的操作系统和处理器上进行转移 它的口令必须是8至56个字符,并将在内部被转化为448位的密钥

Since:

JDK 1.8+

Version:

5.3.8

Author:

Kimi Liu

Constructor Summary

Constructors

Constructor and Description
BCrypt()
BCrypt(int strength)
BCrypt(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) 生成密文,使用长度为10的加盐方式
static String	hashpw(String password, String salt) 生成密文
boolean	matches(CharSequence rawPassword, String encodedPassword)

Methods inherited from class java.lang.Object

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

Constructor Detail

BCrypt

public BCrypt()

BCrypt

public BCrypt(int strength)

Parameters:

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

BCrypt

public BCrypt(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)

生成密文,使用长度为10的加盐方式

Parameters:

password - 需要加密的明文

Returns:

密文

hashpw

public static String hashpw(String password,
                            String salt)

生成密文

Parameters:

password - 需要加密的明文

salt - 盐,使用gensalt() 生成

Returns:

密文

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)