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https://codeberg.org/Mercury-IM/Smack
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SMACK-344 Patch applied that allows the host and service name to be different for SASL authentication
git-svn-id: http://svn.igniterealtime.org/svn/repos/smack/branches/smack_3_3_0@13620 b35dd754-fafc-0310-a699-88a17e54d16e
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rcollier
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commit
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2 changed files with 99 additions and 13 deletions
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@ -315,8 +315,13 @@ public class SASLAuthentication implements UserAuthentication {
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currentMechanism = constructor.newInstance(this);
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// Trigger SASL authentication with the selected mechanism. We use
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// connection.getHost() since GSAPI requires the FQDN of the server, which
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// may not match the XMPP domain.
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currentMechanism.authenticate(username, connection.getServiceName(), password);
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// may not match the XMPP domain.
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//The serviceName is basically the value that XMPP server sends to the client as being the location
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//of the XMPP service we are trying to connect to. This should have the format: host [ "/" serv-name ]
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//as per RFC-2831 guidelines
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String serviceName = connection.getServiceName();
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currentMechanism.authenticate(username, connection.getHost(), serviceName, password);
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// Wait until SASL negotiation finishes
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synchronized (this) {
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@ -383,7 +388,7 @@ public class SASLAuthentication implements UserAuthentication {
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public String authenticateAnonymously() throws XMPPException {
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try {
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currentMechanism = new SASLAnonymous(this);
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currentMechanism.authenticate(null,null,"");
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currentMechanism.authenticate(null,null,null,"");
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// Wait until SASL negotiation finishes
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synchronized (this) {
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@ -51,6 +51,30 @@ import javax.security.sasl.SaslException;
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* using the CallbackHandler method.</li>
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* <li>{@link #challengeReceived(String)} -- Handle a challenge from the server.</li>
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* </ul>
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*
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* Basic XMPP SASL authentication steps:
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* 1. Client authentication initialization, stanza sent to the server (Base64 encoded):
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* <auth xmlns='urn:ietf:params:xml:ns:xmpp-sasl' mechanism='DIGEST-MD5'/>
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* 2. Server sends back to the client the challenge response (Base64 encoded)
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* sample:
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* realm=<sasl server realm>,nonce="OA6MG9tEQGm2hh",qop="auth",charset=utf-8,algorithm=md5-sess
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* 3. The client responds back to the server (Base 64 encoded):
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* sample:
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* username=<userid>,realm=<sasl server realm from above>,nonce="OA6MG9tEQGm2hh",
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* cnonce="OA6MHXh6VqTrRk",nc=00000001,qop=auth,
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* digest-uri=<digesturi>,
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* response=d388dad90d4bbd760a152321f2143af7,
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* charset=utf-8,
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* authzid=<id>
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* 4. The server evaluates if the user is present and contained in the REALM
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* if successful it sends: <response xmlns='urn:ietf:params:xml:ns:xmpp-sasl'/> (Base64 encoded)
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* if not successful it sends:
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* sample:
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* <challenge xmlns='urn:ietf:params:xml:ns:xmpp-sasl'>
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* cnNwYXV0aD1lYTQwZjYwMzM1YzQyN2I1NTI3Yjg0ZGJhYmNkZmZmZA==
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* </challenge>
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*
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*
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* @author Jay Kline
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*/
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@ -62,37 +86,88 @@ public abstract class SASLMechanism implements CallbackHandler {
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protected String password;
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protected String hostname;
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public SASLMechanism(SASLAuthentication saslAuthentication) {
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this.saslAuthentication = saslAuthentication;
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}
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/**
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* Builds and sends the <tt>auth</tt> stanza to the server. Note that this method of
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* authentication is not recommended, since it is very inflexable. Use
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* authentication is not recommended, since it is very inflexable. Use
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* {@link #authenticate(String, String, CallbackHandler)} whenever possible.
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*
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*
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* Explanation of auth stanza:
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*
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* The client authentication stanza needs to include the digest-uri of the form: xmpp/serverName
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* From RFC-2831:
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* digest-uri = "digest-uri" "=" digest-uri-value
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* digest-uri-value = serv-type "/" host [ "/" serv-name ]
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*
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* digest-uri:
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* Indicates the principal name of the service with which the client
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* wishes to connect, formed from the serv-type, host, and serv-name.
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* For example, the FTP service
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* on "ftp.example.com" would have a "digest-uri" value of "ftp/ftp.example.com"; the SMTP
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* server from the example above would have a "digest-uri" value of
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* "smtp/mail3.example.com/example.com".
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*
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* host:
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* The DNS host name or IP address for the service requested. The DNS host name
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* must be the fully-qualified canonical name of the host. The DNS host name is the
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* preferred form; see notes on server processing of the digest-uri.
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*
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* serv-name:
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* Indicates the name of the service if it is replicated. The service is
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* considered to be replicated if the client's service-location process involves resolution
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* using standard DNS lookup operations, and if these operations involve DNS records (such
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* as SRV, or MX) which resolve one DNS name into a set of other DNS names. In this case,
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* the initial name used by the client is the "serv-name", and the final name is the "host"
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* component. For example, the incoming mail service for "example.com" may be replicated
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* through the use of MX records stored in the DNS, one of which points at an SMTP server
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* called "mail3.example.com"; it's "serv-name" would be "example.com", it's "host" would be
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* "mail3.example.com". If the service is not replicated, or the serv-name is identical to
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* the host, then the serv-name component MUST be omitted
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*
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* digest-uri verification is needed for ejabberd 2.0.3 and higher
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*
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* @param username the username of the user being authenticated.
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* @param host the hostname where the user account resides.
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* @param host the hostname where the user account resides.
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* @param serviceName the xmpp service location - used by the SASL client in digest-uri creation
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* serviceName format is: host [ "/" serv-name ] as per RFC-2831
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* @param password the password for this account.
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* @throws IOException If a network error occurs while authenticating.
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* @throws XMPPException If a protocol error occurs or the user is not authenticated.
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*/
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public void authenticate(String username, String host, String password) throws IOException, XMPPException {
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public void authenticate(String username, String host, String serviceName, String password) throws IOException, XMPPException {
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//Since we were not provided with a CallbackHandler, we will use our own with the given
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//information
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//Set the authenticationID as the username, since they must be the same in this case.
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this.authenticationId = username;
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this.password = password;
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this.hostname = host;
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this.hostname = host;
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String[] mechanisms = { getName() };
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Map<String,String> props = new HashMap<String,String>();
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sc = Sasl.createSaslClient(mechanisms, username, "xmpp", host, props, this);
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Map<String,String> props = new HashMap<String,String>();
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sc = Sasl.createSaslClient(mechanisms, username, "xmpp", serviceName, props, this);
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authenticate();
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}
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/**
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* Same as {@link #authenticate(String, String, String, String)}, but with the hostname used as the serviceName.
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* <p>
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* Kept for backward compatibility only.
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*
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* @param username the username of the user being authenticated.
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* @param host the hostname where the user account resides.
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* @param password the password for this account.
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* @throws IOException If a network error occurs while authenticating.
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* @throws XMPPException If a protocol error occurs or the user is not authenticated.
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* @deprecated Please use {@link #authenticate(String, String, String, String)} instead.
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*/
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public void authenticate(String username, String host, String password) throws IOException, XMPPException {
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authenticate(username, host, host, password);
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}
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/**
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* Builds and sends the <tt>auth</tt> stanza to the server. The callback handler will handle
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* any additional information, such as the authentication ID or realm, if it is needed.
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@ -178,7 +253,13 @@ public abstract class SASLMechanism implements CallbackHandler {
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pcb.setPassword(password.toCharArray());
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} else if(callbacks[i] instanceof RealmCallback) {
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RealmCallback rcb = (RealmCallback)callbacks[i];
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rcb.setText(hostname);
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//Retrieve the REALM from the challenge response that the server returned when the client initiated the authentication
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//exchange. If this value is not null or empty, *this value* has to be sent back to the server in the client's response
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//to the server's challenge
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String text = rcb.getDefaultText();
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//The SASL client (sc) created in smack uses rcb.getText when creating the negotiatedRealm to send it back to the server
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//Make sure that this value matches the server's realm
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rcb.setText(text);
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} else if(callbacks[i] instanceof RealmChoiceCallback){
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//unused
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//RealmChoiceCallback rccb = (RealmChoiceCallback)callbacks[i];
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@ -319,5 +400,5 @@ public abstract class SASLMechanism implements CallbackHandler {
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stanza.append("</failure>");
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return stanza.toString();
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}
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}
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}
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}
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