Package org.apache.activemq.artemis.spi.core.security.scram

Class ScramUtils

java.lang.Object

org.apache.activemq.artemis.spi.core.security.scram.ScramUtils

public class ScramUtils
extends Object

Provides static methods for working with SCRAM/SASL

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	ScramUtils.NewPasswordByteArrayData	New password data in byte array format
static class	ScramUtils.NewPasswordStringData	New password data in database friendly format, i.e.

Method Summary

Modifier and Type	Method	Description
static ScramUtils.NewPasswordStringData	byteArrayToStringData(ScramUtils.NewPasswordByteArrayData ba)	Transforms NewPasswordByteArrayData into NewPasswordStringData into database friendly (string) representation Uses Base64 to encode the byte arrays into strings
static byte[]	computeHmac(byte[] key, String hmacName, String string)	Computes HMAC byte array for given string
static byte[]	computeHmac(byte[] key, Mac hmac, String string)
static Mac	createHmac(byte[] keyBytes, String hmacName)	Creates HMAC
static byte[]	generateSaltedPassword(String password, byte[] salt, int iterationsCount, Mac mac)	Generates salted password.
static boolean	isNullOrEmpty(String string)	Checks if string is null or empty
static ScramUtils.NewPasswordByteArrayData	newPassword(String passwordClearText, byte[] salt, int iterations, MessageDigest messageDigest, Mac mac)	Computes the data associated with new password like salted password, keys, etc

Methods inherited from class java.lang.Object

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

Method Details

generateSaltedPassword

public static byte[] generateSaltedPassword(String password,
 byte[] salt,
 int iterationsCount,
 Mac mac)
                                     throws ScramException

Generates salted password.

Parameters:

password - Clear form password, i.e. what user typed

salt - Salt to be used

iterationsCount - Iterations for 'salting'

mac - HMAC to be used

Returns:

salted password

Throws:

ScramException

createHmac

public static Mac createHmac(byte[] keyBytes,
 String hmacName)
                      throws NoSuchAlgorithmException,
InvalidKeyException

Creates HMAC

Parameters:

keyBytes - key

hmacName - HMAC name

Returns:

Mac

Throws:

InvalidKeyException - if internal error occur while working with SecretKeySpec

NoSuchAlgorithmException - if hmacName is not supported by the java

computeHmac

public static byte[] computeHmac(byte[] key,
 String hmacName,
 String string)
                          throws InvalidKeyException,
NoSuchAlgorithmException

Computes HMAC byte array for given string

Parameters:

key - key

hmacName - HMAC name

string - string for which HMAC will be computed

Returns:

computed HMAC

Throws:

InvalidKeyException - if internal error occur while working with SecretKeySpec

NoSuchAlgorithmException - if hmacName is not supported by the java

computeHmac

public static byte[] computeHmac(byte[] key,
 Mac hmac,
 String string)
                          throws ScramException

Throws:

ScramException

isNullOrEmpty

public static boolean isNullOrEmpty(String string)

Checks if string is null or empty

Parameters:

string - String to be tested

Returns:

true if the string is null or empty, false otherwise

newPassword

public static ScramUtils.NewPasswordByteArrayData newPassword(String passwordClearText,
 byte[] salt,
 int iterations,
 MessageDigest messageDigest,
 Mac mac)
                                                       throws ScramException

Computes the data associated with new password like salted password, keys, etc

This method is supposed to be used by a server when user provides new clear form password. We don't want to save it that way so we generate salted password and store it along with other data required by the SCRAM mechanism

Parameters:

passwordClearText - Clear form password, i.e. as provided by the user

salt - Salt to be used

iterations - Iterations for 'salting'

mac - HMAC name to be used

messageDigest - Digest name to be used

Returns:

new password data while working with SecretKeySpec

Throws:

ScramException

byteArrayToStringData

public static ScramUtils.NewPasswordStringData byteArrayToStringData(ScramUtils.NewPasswordByteArrayData ba)

Transforms NewPasswordByteArrayData into NewPasswordStringData into database friendly (string) representation Uses Base64 to encode the byte arrays into strings

Parameters:

ba - Byte array data

Returns:

String data