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Code Issues Releases Wiki Activity

SASL Proxy Auth support

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This adds the ability to provide a distinct authorization identifier for use
by SASL mechanisms. Not all SASL mechanisms support this operation, in
particular CRAM-MD5.

Both the javax and provided SASL implementations are extended, and an authzid
parameter added to the authenticate method.

The authorization identifier is passed as a EntityBareJid in order to assure the
correct form.

Resolves SMACK-677.

Minor-Modifications-By: Florian Schmaus <flo@geekplace.eu>
This commit is contained in:
Dave Cridland 2015-06-16 17:50:30 +01:00 committed by Florian Schmaus
parent a00331dbb4
commit 9c772add93
18 changed files with 182 additions and 32 deletions
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2
smack-bosh/src/main/java/org/jivesoftware/smack/bosh/XMPPBOSHConnection.java
View file

@ -219,7 +219,7 @@ public class XMPPBOSHConnection extends AbstractXMPPConnection {
protected void loginInternal(String username, String password, Resourcepart resource) throws XMPPException,
SmackException, IOException, InterruptedException {
// Authenticate using SASL
saslAuthentication.authenticate(username, password);
saslAuthentication.authenticate(username, password, config.getAuthzid());
bindResourceAndEstablishSession(resource);

38
smack-core/src/main/java/org/jivesoftware/smack/ConnectionConfiguration.java
View file

@ -31,6 +31,7 @@ import org.jivesoftware.smack.util.CollectionUtil;
import org.jivesoftware.smack.util.Objects;
import org.jivesoftware.smack.util.StringUtils;
import org.jxmpp.jid.DomainBareJid;
import org.jxmpp.jid.EntityBareJid;
import org.jxmpp.jid.parts.Resourcepart;
import org.jxmpp.stringprep.XmppStringprepException;
@ -81,6 +82,11 @@ public abstract class ConnectionConfiguration {
private final String password;
private final Resourcepart resource;
/**
* The optional SASL authorization identity (see RFC 6120 § 6.3.8).
*/
private final EntityBareJid authzid;
/**
* Initial presence as of RFC 6121 § 4.2
* @see <a href="http://xmpp.org/rfcs/rfc6121.html#presence-initial">RFC 6121 § 4.2 Initial Presence</a>
@ -110,6 +116,7 @@ public abstract class ConnectionConfiguration {
private final Set<String> enabledSaslMechanisms;
protected ConnectionConfiguration(Builder<?,?> builder) {
authzid = builder.authzid;
username = builder.username;
password = builder.password;
callbackHandler = builder.callbackHandler;
@ -361,6 +368,17 @@ public abstract class ConnectionConfiguration {
return resource;
}
/**
* Returns the optional XMPP address to be requested as the SASL authorization identity.
*
* @return the authorization identifier.
* @see <a href="http://tools.ietf.org/html/rfc6120#section-6.3.8">RFC 6120 § 6.3.8. Authorization Identity</a>
* @since 4.2
*/
public EntityBareJid getAuthzid() {
return authzid;
}
/**
* Returns true if an available presence should be sent when logging in while reconnecting.
*
@ -425,6 +443,7 @@ public abstract class ConnectionConfiguration {
private String[] enabledSSLProtocols;
private String[] enabledSSLCiphers;
private HostnameVerifier hostnameVerifier;
private EntityBareJid authzid;
private CharSequence username;
private String password;
private Resourcepart resource;
@ -803,6 +822,25 @@ public abstract class ConnectionConfiguration {
return getThis();
}
/**
* Set the XMPP address to be used as authorization identity.
* <p>
* In XMPP, authorization identities are bare jids. In general, callers should allow the server to select the
* authorization identifier automatically, and not call this. Note that setting the authzid does not set the XMPP
* service domain, which should typically match.
* Calling this will also SASL CRAM, since this mechanism does not support authzid.
* </p>
*
* @param authzid The BareJid to be requested as the authorization identifier.
* @return a reference to this builder.
* @see <a href="http://tools.ietf.org/html/rfc6120#section-6.3.8">RFC 6120 § 6.3.8. Authorization Identity</a>
* @since 4.2
*/
public B setAuthzid(EntityBareJid authzid) {
this.authzid = authzid;
return getThis();
}
public abstract C build();
protected abstract B getThis();

28
smack-core/src/main/java/org/jivesoftware/smack/SASLAuthentication.java
View file

@ -25,6 +25,7 @@ import org.jivesoftware.smack.sasl.SASLMechanism;
import org.jivesoftware.smack.sasl.packet.SaslStreamElements.SASLFailure;
import org.jivesoftware.smack.sasl.packet.SaslStreamElements.Success;
import org.jxmpp.jid.DomainBareJid;
import org.jxmpp.jid.EntityBareJid;
import javax.security.auth.callback.CallbackHandler;
@ -171,26 +172,27 @@ public final class SASLAuthentication {
*
* @param username the username that is authenticating with the server.
* @param password the password to send to the server.
* @throws XMPPErrorException
* @throws SASLErrorException
* @throws IOException
* @throws SmackException
* @throws InterruptedException
* @param authzid the authorization identifier (typically null).
* @throws XMPPErrorException
* @throws SASLErrorException
* @throws IOException
* @throws SmackException
* @throws InterruptedException
*/
public void authenticate(String username, String password)
public void authenticate(String username, String password, EntityBareJid authzid)
throws XMPPErrorException, SASLErrorException, IOException,
SmackException, InterruptedException {
currentMechanism = selectMechanism();
currentMechanism = selectMechanism(authzid);
final CallbackHandler callbackHandler = configuration.getCallbackHandler();
final String host = connection.getHost();
final DomainBareJid xmppServiceDomain = connection.getXMPPServiceDomain();
synchronized (this) {
if (callbackHandler != null) {
currentMechanism.authenticate(host, xmppServiceDomain, callbackHandler);
currentMechanism.authenticate(host, xmppServiceDomain, callbackHandler, authzid);
}
else {
currentMechanism.authenticate(username, host, xmppServiceDomain, password);
currentMechanism.authenticate(username, host, xmppServiceDomain, password, authzid);
}
final long deadline = System.currentTimeMillis() + connection.getPacketReplyTimeout();
while (!authenticationSuccessful && saslException == null) {
@ -312,7 +314,7 @@ public final class SASLAuthentication {
return lastUsedMech.getName();
}
private SASLMechanism selectMechanism() throws SmackException {
private SASLMechanism selectMechanism(EntityBareJid authzid) throws SmackException {
Iterator<SASLMechanism> it = REGISTERED_MECHANISMS.iterator();
final List<String> serverMechanisms = getServerMechanisms();
if (serverMechanisms.isEmpty()) {
@ -330,6 +332,12 @@ public final class SASLAuthentication {
if (!configuration.isEnabledSaslMechanism(mechanismName)) {
continue;
}
if (authzid != null) {
if (!mechanism.authzidSupported()) {
LOGGER.fine("Skipping " + mechanism + " because authzid is required by not supported by this SASL mechanism");
continue;
}
}
if (serverMechanisms.contains(mechanismName)) {
// Create a new instance of the SASLMechanism for every authentication attempt.
return mechanism.instanceForAuthentication(connection);

33
smack-core/src/main/java/org/jivesoftware/smack/sasl/SASLMechanism.java
View file

@ -25,6 +25,7 @@ import org.jivesoftware.smack.util.StringTransformer;
import org.jivesoftware.smack.util.StringUtils;
import org.jivesoftware.smack.util.stringencoder.Base64;
import org.jxmpp.jid.DomainBareJid;
import org.jxmpp.jid.EntityBareJid;
import javax.security.auth.callback.CallbackHandler;
@ -34,9 +35,9 @@ import javax.security.auth.callback.CallbackHandler;
* <li>{@link #getName()} -- returns the common name of the SASL mechanism.</li>
* </ul>
* Subclasses will likely want to implement their own versions of these methods:
* <li>{@link #authenticate(String, String, DomainBareJid, String)} -- Initiate authentication stanza using the
* <li>{@link #authenticate(String, String, DomainBareJid, String, EntityBareJid)} -- Initiate authentication stanza using the
* deprecated method.</li>
* <li>{@link #authenticate(String, DomainBareJid, CallbackHandler)} -- Initiate authentication stanza
* <li>{@link #authenticate(String, DomainBareJid, CallbackHandler, EntityBareJid)} -- Initiate authentication stanza
* using the CallbackHandler method.</li>
* <li>{@link #challengeReceived(String, boolean)} -- Handle a challenge from the server.</li>
* </ul>
@ -102,6 +103,12 @@ public abstract class SASLMechanism implements Comparable<SASLMechanism> {
*/
protected String authenticationId;
/**
* The authorization identifier (authzid).
* This is always a bare Jid, but can be null.
*/
protected EntityBareJid authorizationId;
/**
* The name of the XMPP service
*/
@ -116,7 +123,7 @@ public abstract class SASLMechanism implements Comparable<SASLMechanism> {
/**
* Builds and sends the <tt>auth</tt> stanza to the server. Note that this method of
* authentication is not recommended, since it is very inflexible. Use
* {@link #authenticate(String, DomainBareJid, CallbackHandler)} whenever possible.
* {@link #authenticate(String, DomainBareJid, CallbackHandler, EntityBareJid)} whenever possible.
*
* Explanation of auth stanza:
*
@ -149,24 +156,27 @@ public abstract class SASLMechanism implements Comparable<SASLMechanism> {
* called "mail3.example.com"; it's "serv-name" would be "example.com", it's "host" would be
* "mail3.example.com". If the service is not replicated, or the serv-name is identical to
* the host, then the serv-name component MUST be omitted
*
* digest-uri verification is needed for ejabberd 2.0.3 and higher
*
*
* digest-uri verification is needed for ejabberd 2.0.3 and higher
*
* @param username the username of the user being authenticated.
* @param host the hostname where the user account resides.
* @param serviceName the xmpp service location - used by the SASL client in digest-uri creation
* serviceName format is: host [ "/" serv-name ] as per RFC-2831
* @param password the password for this account.
* @param authzid the optional authorization identity.
* @throws SmackException If a network error occurs while authenticating.
* @throws NotConnectedException
* @throws InterruptedException
*/
public final void authenticate(String username, String host, DomainBareJid serviceName, String password)
public final void authenticate(String username, String host, DomainBareJid serviceName, String password, EntityBareJid authzid)
throws SmackException, NotConnectedException, InterruptedException {
this.authenticationId = username;
this.host = host;
this.serviceName = serviceName;
this.password = password;
this.authorizationId = authzid;
assert(authorizationId == null || authzidSupported());
authenticateInternal();
authenticate();
}
@ -184,14 +194,17 @@ public abstract class SASLMechanism implements Comparable<SASLMechanism> {
* @param host the hostname where the user account resides.
* @param serviceName the xmpp service location
* @param cbh the CallbackHandler to obtain user information.
* @param authzid the optional authorization identity.
* @throws SmackException
* @throws NotConnectedException
* @throws InterruptedException
*/
public void authenticate(String host, DomainBareJid serviceName, CallbackHandler cbh)
public void authenticate(String host, DomainBareJid serviceName, CallbackHandler cbh, EntityBareJid authzid)
throws SmackException, NotConnectedException, InterruptedException {
this.host = host;
this.serviceName = serviceName;
this.authorizationId = authzid;
assert(authorizationId == null || authzidSupported());
authenticateInternal(cbh);
authenticate();
}
@ -283,6 +296,10 @@ public abstract class SASLMechanism implements Comparable<SASLMechanism> {
return saslMechansim;
}
public boolean authzidSupported() {
return false;
}
protected abstract SASLMechanism newInstance();
protected static byte[] toBytes(String string) {

18
smack-core/src/main/java/org/jivesoftware/smack/sasl/core/SCRAMSHA1Mechanism.java
View file

@ -38,7 +38,6 @@ public class SCRAMSHA1Mechanism extends SASLMechanism {
public static final String NAME = "SCRAM-SHA-1";
private static final int RANDOM_ASCII_BYTE_COUNT = 32;
private static final String DEFAULT_GS2_HEADER = "n,,";
private static final byte[] CLIENT_KEY_BYTES = toBytes("Client Key");
private static final byte[] SERVER_KEY_BYTES = toBytes("Server Key");
private static final byte[] ONE = new byte[] { 0, 0, 0, 1 };
@ -77,7 +76,7 @@ public class SCRAMSHA1Mechanism extends SASLMechanism {
clientRandomAscii = getRandomAscii();
String saslPrepedAuthcId = saslPrep(authenticationId);
clientFirstMessageBare = "n=" + escape(saslPrepedAuthcId) + ",r=" + clientRandomAscii;
String clientFirstMessage = DEFAULT_GS2_HEADER + clientFirstMessageBare;
String clientFirstMessage = getGS2Header() + clientFirstMessageBare;
state = State.AUTH_TEXT_SENT;
return toBytes(clientFirstMessage);
}
@ -105,6 +104,11 @@ public class SCRAMSHA1Mechanism extends SASLMechanism {
}
}
@Override
public boolean authzidSupported() {
return true;
}
@Override
protected byte[] evaluateChallenge(byte[] challenge) throws SmackException {
final String challengeString = new String(challenge);
@ -148,7 +152,7 @@ public class SCRAMSHA1Mechanism extends SASLMechanism {
// Parsing and error checking is done, we can now begin to calculate the values
// First the client-final-message-without-proof
String clientFinalMessageWithoutProof = "c=" + Base64.encode(DEFAULT_GS2_HEADER) + ",r=" + rvalue;
String clientFinalMessageWithoutProof = "c=" + Base64.encode(getGS2Header()) + ",r=" + rvalue;
// AuthMessage := client-first-message-bare + "," + server-first-message + "," +
// client-final-message-without-proof
@ -209,6 +213,14 @@ public class SCRAMSHA1Mechanism extends SASLMechanism {
return null;
}
private final String getGS2Header() {
String authzidPortion = "";
if (authorizationId != null) {
authzidPortion = "a=" + authorizationId;
}
return "n," + authzidPortion + ",";
}
private static Map<Character, String> parseAttributes(String string) throws SmackException {
if (string.length() == 0) {
return Collections.emptyMap();

17
smack-core/src/test/java/org/jivesoftware/smack/sasl/DigestMd5SaslTest.java
View file

@ -27,6 +27,7 @@ import org.jivesoftware.smack.SmackException.NotConnectedException;
import org.jivesoftware.smack.util.StringUtils;
import org.jxmpp.jid.impl.JidCreate;
import org.jxmpp.stringprep.XmppStringprepException;
import org.jxmpp.jid.EntityBareJid;
public class DigestMd5SaslTest extends AbstractSaslTest {
@ -37,9 +38,12 @@ public class DigestMd5SaslTest extends AbstractSaslTest {
super(saslMechanism);
}
protected void runTest() throws NotConnectedException, SmackException, InterruptedException, XmppStringprepException {
saslMechanism.authenticate("florian", "irrelevant", JidCreate.domainBareFrom("xmpp.org"), "secret");
protected void runTest(boolean useAuthzid) throws NotConnectedException, SmackException, InterruptedException, XmppStringprepException {
EntityBareJid authzid = null;
if (useAuthzid) {
authzid = JidCreate.entityBareFrom("shazbat@xmpp.org");
}
saslMechanism.authenticate("florian", "irrelevant", JidCreate.domainBareFrom("xmpp.org"), "secret", authzid);
byte[] response = saslMechanism.evaluateChallenge(challengeBytes);
String responseString = new String(response);
String[] responseParts = responseString.split(",");
@ -51,6 +55,11 @@ public class DigestMd5SaslTest extends AbstractSaslTest {
String value = keyValue[1].replace("\"", "");
responsePairs.put(key, value);
}
if (useAuthzid) {
assertMapValue("authzid", "shazbat@xmpp.org", responsePairs);
} else {
assert(!responsePairs.containsKey("authzid"));
}
assertMapValue("username", "florian", responsePairs);
assertMapValue("realm", "xmpp.org", responsePairs);
assertMapValue("digest-uri", "xmpp/xmpp.org", responsePairs);
@ -58,6 +67,6 @@ public class DigestMd5SaslTest extends AbstractSaslTest {
}
private static void assertMapValue(String key, String value, Map<String, String> map) {
assertEquals(map.get(key), value);
assertEquals(value, map.get(key));
}
}

2
smack-core/src/test/java/org/jivesoftware/smack/sasl/core/SCRAMSHA1MechanismTest.java
View file

@ -48,7 +48,7 @@ public class SCRAMSHA1MechanismTest extends SmackTestSuite {
}
};
mech.authenticate(USERNAME, "unusedFoo", JidTestUtil.DOMAIN_BARE_JID_1, PASSWORD);
mech.authenticate(USERNAME, "unusedFoo", JidTestUtil.DOMAIN_BARE_JID_1, PASSWORD, null);
AuthMechanism authMechanism = con.getSentPacket();
assertEquals(SCRAMSHA1Mechanism.NAME, authMechanism.getMechanism());
assertEquals(CLIENT_FIRST_MESSAGE, saslLayerString(authMechanism.getAuthenticationText()));

5
smack-sasl-javax/src/main/java/org/jivesoftware/smack/sasl/javax/SASLDigestMD5Mechanism.java
View file

@ -25,6 +25,11 @@ public class SASLDigestMD5Mechanism extends SASLJavaXMechanism {
public static final String NAME = DIGESTMD5;
@Override
public boolean authzidSupported() {
return true;
}
public String getName() {
return NAME;
}

5
smack-sasl-javax/src/main/java/org/jivesoftware/smack/sasl/javax/SASLExternalMechanism.java
View file

@ -46,6 +46,11 @@ public class SASLExternalMechanism extends SASLJavaXMechanism {
public static final String NAME = EXTERNAL;
@Override
public boolean authzidSupported() {
return true;
}
@Override
public String getName() {
return EXTERNAL;

5
smack-sasl-javax/src/main/java/org/jivesoftware/smack/sasl/javax/SASLGSSAPIMechanism.java
View file

@ -34,6 +34,11 @@ public class SASLGSSAPIMechanism extends SASLJavaXMechanism {
System.setProperty("java.security.auth.login.config","gss.conf");
}
@Override
public boolean authzidSupported() {
return true;
}
@Override
public String getName() {
return NAME;

6
smack-sasl-javax/src/main/java/org/jivesoftware/smack/sasl/javax/SASLJavaXMechanism.java
View file

@ -53,8 +53,12 @@ public abstract class SASLJavaXMechanism extends SASLMechanism {
throws SmackException {
String[] mechanisms = { getName() };
Map<String, String> props = getSaslProps();
String authzid = null;
if (authorizationId != null) {
authzid = authorizationId.toString();
}
try {
sc = Sasl.createSaslClient(mechanisms, null, "xmpp", getServerName().toString(), props,
sc = Sasl.createSaslClient(mechanisms, authzid, "xmpp", getServerName().toString(), props,
new CallbackHandler() {
@Override
public void handle(Callback[] callbacks) throws IOException,

5
smack-sasl-javax/src/main/java/org/jivesoftware/smack/sasl/javax/SASLPlainMechanism.java
View file

@ -29,6 +29,11 @@ public class SASLPlainMechanism extends SASLJavaXMechanism {
return NAME;
}
@Override
public boolean authzidSupported() {
return true;
}
@Override
public int getPriority() {
return 400;

7
smack-sasl-javax/src/test/java/org/jivesoftware/smack/sasl/javax/SASLDigestMD5Test.java
View file

@ -30,6 +30,11 @@ public class SASLDigestMD5Test extends DigestMd5SaslTest {
@Test
public void testDigestMD5() throws NotConnectedException, SmackException, InterruptedException, XmppStringprepException {
runTest();
runTest(false);
}
@Test
public void testDigestMD5Authzid() throws NotConnectedException, SmackException, InterruptedException, XmppStringprepException {
runTest(true);
}
}

12
smack-sasl-provided/src/main/java/org/jivesoftware/smack/sasl/provided/SASLDigestMD5Mechanism.java
View file

@ -83,6 +83,11 @@ public class SASLDigestMD5Mechanism extends SASLMechanism {
return new SASLDigestMD5Mechanism();
}
@Override
public boolean authzidSupported() {
return true;
}
@Override
public void checkIfSuccessfulOrThrow() throws SmackException {
@ -141,7 +146,14 @@ public class SASLDigestMD5Mechanism extends SASLMechanism {
String responseValue = calcResponse(DigestType.ClientResponse);
// @formatter:off
// See RFC 2831 2.1.2 digest-response
String authzid;
if (authorizationId == null) {
authzid = "";
} else {
authzid = ",authzid=\"" + authorizationId + '"';
}
String saslString = "username=\"" + authenticationId + '"'
+ authzid
+ ",realm=\"" + serviceName + '"'
+ ",nonce=\"" + nonce + '"'
+ ",cnonce=\"" + cnonce + '"'

9
smack-sasl-provided/src/main/java/org/jivesoftware/smack/sasl/provided/SASLExternalMechanism.java
View file

@ -40,6 +40,10 @@ public class SASLExternalMechanism extends SASLMechanism {
@Override
protected byte[] getAuthenticationText() throws SmackException {
if (authorizationId != null) {
return toBytes(authorizationId.toString());
}
if (StringUtils.isNullOrEmpty(authenticationId)) {
return null;
}
@ -67,4 +71,9 @@ public class SASLExternalMechanism extends SASLMechanism {
// No check performed
}
@Override
public boolean authzidSupported() {
return true;
}
}

13
smack-sasl-provided/src/main/java/org/jivesoftware/smack/sasl/provided/SASLPlainMechanism.java
View file

@ -34,7 +34,13 @@ public class SASLPlainMechanism extends SASLMechanism {
@Override
protected byte[] getAuthenticationText() throws SmackException {
// concatenate and encode username (authcid) and password
byte[] authcid = toBytes('\u0000' + authenticationId);
String authzid;
if (authorizationId == null) {
authzid = "";
} else {
authzid = authorizationId.toString();
}
byte[] authcid = toBytes(authzid + '\u0000' + authenticationId);
byte[] passw = toBytes('\u0000' + password);
return ByteUtils.concact(authcid, passw);
@ -59,4 +65,9 @@ public class SASLPlainMechanism extends SASLMechanism {
public void checkIfSuccessfulOrThrow() throws SmackException {
// No check performed
}
@Override
public boolean authzidSupported() {
return true;
}
}

7
smack-sasl-provided/src/test/java/org/jivesoftware/smack/sasl/provided/SASLDigestMD5Test.java
View file

@ -29,6 +29,11 @@ public class SASLDigestMD5Test extends DigestMd5SaslTest {
@Test
public void testDigestMD5() throws NotConnectedException, SmackException, InterruptedException, XmppStringprepException {
runTest();
runTest(false);
}
@Test
public void testDigestMD5Authzid() throws NotConnectedException, SmackException, InterruptedException, XmppStringprepException {
runTest(true);
}
}

2
smack-tcp/src/main/java/org/jivesoftware/smack/tcp/XMPPTCPConnection.java
View file

@ -376,7 +376,7 @@ public class XMPPTCPConnection extends AbstractXMPPConnection {
protected synchronized void loginInternal(String username, String password, Resourcepart resource) throws XMPPException,
SmackException, IOException, InterruptedException {
// Authenticate using SASL
saslAuthentication.authenticate(username, password);
saslAuthentication.authenticate(username, password, config.getAuthzid());
// If compression is enabled then request the server to use stream compression. XEP-170
// recommends to perform stream compression before resource binding.