org.springframework.security.crypto.bcrypt

Class BCryptPasswordEncoder

java.lang.Object

org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder

All Implemented Interfaces:

PasswordEncoder

public class BCryptPasswordEncoder
extends Object
implements PasswordEncoder

Implementation of PasswordEncoder that uses the BCrypt strong hashing function. Clients can optionally supply a "strength" (a.k.a. log rounds in BCrypt) and a SecureRandom instance. The larger the strength parameter the more work will have to be done (exponentially) to hash the passwords. The default value is 10.

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method and Description
String	encode(CharSequence rawPassword) Encode the raw password.
boolean	matches(CharSequence rawPassword, String encodedPassword) Verify the encoded password obtained from storage matches the submitted raw password after it too is encoded.

Methods inherited from class java.lang.Object

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

Constructor Detail

BCryptPasswordEncoder

public BCryptPasswordEncoder()

BCryptPasswordEncoder

public BCryptPasswordEncoder(int strength)

Parameters:

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

BCryptPasswordEncoder

public BCryptPasswordEncoder(int strength,
                             SecureRandom random)

Parameters:

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

random - the secure random instance to use

Method Detail

encode

public String encode(CharSequence rawPassword)

Description copied from interface: PasswordEncoder

Encode the raw password. Generally, a good encoding algorithm applies a SHA-1 or greater hash combined with an 8-byte or greater randomly generated salt.

Specified by:

encode in interface PasswordEncoder

matches

public boolean matches(CharSequence rawPassword,
                       String encodedPassword)

Description copied from interface: PasswordEncoder

Verify the encoded password obtained from storage matches the submitted raw password after it too is encoded. Returns true if the passwords match, false if they do not. The stored password itself is never decoded.

Specified by:

matches in interface PasswordEncoder

Parameters:

rawPassword - the raw password to encode and match

encodedPassword - the encoded password from storage to compare with

Returns:

true if the raw password, after encoding, matches the encoded password from storage