tigase.jaxmpp.core.client.xmpp.modules.auth.scram

Class AbstractScram

java.lang.Object

tigase.jaxmpp.core.client.xmpp.modules.auth.saslmechanisms.AbstractSaslMechanism

tigase.jaxmpp.core.client.xmpp.modules.auth.scram.AbstractScram

All Implemented Interfaces:

SaslMechanism

Direct Known Subclasses:

ScramMechanism, ScramPlusMechanism, ScramSHA256Mechanism, ScramSHA512Mechanism

public abstract class AbstractScram
extends AbstractSaslMechanism

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	AbstractScram.BindType

Field Summary

Fields

Modifier and Type	Field and Description
protected static Charset	UTF_CHARSET

Fields inherited from class tigase.jaxmpp.core.client.xmpp.modules.auth.saslmechanisms.AbstractSaslMechanism

SASL_COMPLETE_KEY

Fields inherited from interface tigase.jaxmpp.core.client.xmpp.modules.auth.SaslMechanism

FORCE_AUTHZID

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	AbstractScram(String mechanismName, String algorithm, byte[] clientKey, byte[] serverKey)

Method Summary

Modifier and Type	Method and Description
String	evaluateChallenge(String input, SessionObject sessionObject) Evaluating challenge received from server.
protected abstract byte[]	getBindData(AbstractScram.BindType bindType, SessionObject sessionObject)
protected abstract AbstractScram.BindType	getBindType(SessionObject sessionObject)
protected tigase.jaxmpp.core.client.xmpp.modules.auth.scram.AbstractScram.Data	getData(SessionObject sessionObject)
protected byte[]	h(byte[] data)
static byte[]	hi(String algorithm, byte[] password, byte[] salt, int iterations)
protected static byte[]	hmac(SecretKey key, byte[] data)
boolean	isAllowedToUse(SessionObject sessionObject) This method is used to check if mechanism can be used with current session.
protected SecretKey	key(byte[] key)
String	name() Return mechanism name.
static byte[]	normalize(String str)
protected String	randomString()
protected byte[]	xor(byte[] a, byte[] b)

Methods inherited from class tigase.jaxmpp.core.client.xmpp.modules.auth.saslmechanisms.AbstractSaslMechanism

isComplete, setComplete

Methods inherited from class java.lang.Object

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

Field Detail

UTF_CHARSET

protected static final Charset UTF_CHARSET

Constructor Detail

AbstractScram

protected AbstractScram(String mechanismName,
                        String algorithm,
                        byte[] clientKey,
                        byte[] serverKey)

Method Detail

hi

public static byte[] hi(String algorithm,
                        byte[] password,
                        byte[] salt,
                        int iterations)
                 throws InvalidKeyException,
                        NoSuchAlgorithmException

Throws:

InvalidKeyException

NoSuchAlgorithmException

hmac

protected static byte[] hmac(SecretKey key,
                             byte[] data)
                      throws NoSuchAlgorithmException,
                             InvalidKeyException

Throws:

NoSuchAlgorithmException

InvalidKeyException

normalize

public static byte[] normalize(String str)

evaluateChallenge

public String evaluateChallenge(String input,
                                SessionObject sessionObject)
                         throws ClientSaslException

Description copied from interface: SaslMechanism

Evaluating challenge received from server.

Parameters:

input - received data

sessionObject - current SessionObject

Returns:

calculated response

Throws:

ClientSaslException

getBindData

protected abstract byte[] getBindData(AbstractScram.BindType bindType,
                                      SessionObject sessionObject)

getBindType

protected abstract AbstractScram.BindType getBindType(SessionObject sessionObject)

getData

protected tigase.jaxmpp.core.client.xmpp.modules.auth.scram.AbstractScram.Data getData(SessionObject sessionObject)

h

protected byte[] h(byte[] data)
            throws NoSuchAlgorithmException

Throws:

NoSuchAlgorithmException

isAllowedToUse

public boolean isAllowedToUse(SessionObject sessionObject)

Description copied from interface: SaslMechanism

This method is used to check if mechanism can be used with current session. For example if no username and passowrd is stored in sessionObject, then PlainMechanism can't be used.

Parameters:

sessionObject - current SessionObject

Returns:

true if mechanism can be used it current XMPP session.

key

protected SecretKey key(byte[] key)

name

public String name()

Description copied from interface: SaslMechanism

Return mechanism name.

Returns:

mechanism name.

randomString

protected String randomString()

xor

protected byte[] xor(byte[] a,
                     byte[] b)