com.atlassian.crowd.password.encoder

Class BCryptPasswordEncoder

java.lang.Object

com.atlassian.crowd.password.encoder.BCryptPasswordEncoder

All Implemented Interfaces:

InternalPasswordEncoder, PasswordEncoder

public class BCryptPasswordEncoder
extends Object
implements InternalPasswordEncoder

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method and Description
String	encodePassword(String rawPass, Object salt) Encodes the specified raw password with an implementation specific algorithm.
String	getKey() The key to define this password encoder
boolean	isPasswordValid(String encPass, String rawPass, Object salt) Validates a specified "raw" password against an encoded password.

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 rounds,
                             SecureRandom random)

Method Detail

getKey

public String getKey()

Description copied from interface: PasswordEncoder

The key to define this password encoder

Specified by:

getKey in interface PasswordEncoder

encodePassword

public String encodePassword(String rawPass,
                             Object salt)
                      throws PasswordEncoderException

Description copied from interface: PasswordEncoder

Encodes the specified raw password with an implementation specific algorithm.

This will generally be a one-way message digest such as MD5 or SHA, but may also be a plaintext variant which does no encoding at all, but rather returns the same password it was fed. The latter is useful to plug in when the original password must be stored as-is.

The specified salt will potentially be used by the implementation to "salt" the initial value before encoding. A salt is usually a user-specific value which is added to the password before the digest is computed. This means that computation of digests for common dictionary words will be different than those in the backend store, because the dictionary word digests will not reflect the addition of the salt. If a per-user salt is used (rather than a system-wide salt), it also means users with the same password will have different digest encoded passwords in the backend store.

If a salt value is provided, the same salt value must be use when calling the PasswordEncoder.isPasswordValid(String, String, Object) method. Note that a specific implementation may choose to ignore the salt value (via null), or provide its own.

Specified by:

encodePassword in interface PasswordEncoder

Parameters:

rawPass - the password to encode

salt - optionally used by the implementation to "salt" the raw password before encoding. A null value is legal.

Returns:

encoded password

Throws:

PasswordEncoderException - if there were any issues trying to encode a password

isPasswordValid

public boolean isPasswordValid(String encPass,
                               String rawPass,
                               Object salt)

Description copied from interface: PasswordEncoder

Validates a specified "raw" password against an encoded password.

The encoded password should have previously been generated by PasswordEncoder.encodePassword(String, Object). This method will encode the rawPass (using the optional salt), and then compared it with the presented encPass.

For a discussion of salts, please refer to PasswordEncoder.encodePassword(String, Object).

Specified by:

isPasswordValid in interface PasswordEncoder

Parameters:

encPass - a pre-encoded password

rawPass - a raw password to encode and compare against the pre-encoded password

salt - optionally used by the implementation to "salt" the raw password before encoding. A null value is legal.

Returns:

true if the password is valid , false otherwise