serverPrincipalMap =
+ HashMultimap.create();
/**
* Creates a Kerberos SPNEGO authentication handler with the default
@@ -170,7 +216,8 @@ public KerberosAuthenticationHandler(String type) {
/**
* Initializes the authentication handler instance.
*
- * It creates a Kerberos context using the principal and keytab specified in the configuration.
+ * It creates a Kerberos context using the principal and keytab specified in
+ * the configuration.
*
* This method is invoked by the {@link AuthenticationFilter#init} method.
*
@@ -225,15 +272,27 @@ public void init(Properties config) throws ServletException {
throw new AuthenticationException(le);
}
loginContexts.add(loginContext);
+ KerberosName kerbName = new KerberosName(spnegoPrincipal);
+ if (kerbName.getHostName() != null
+ && kerbName.getRealm() != null
+ && kerbName.getServiceName() != null
+ && kerbName.getServiceName().equals("HTTP")) {
+ LOG.trace("Map server: {} to principal: {}", kerbName.getHostName(),
+ spnegoPrincipal);
+ serverPrincipalMap.put(kerbName.getHostName(), spnegoPrincipal);
+ } else {
+ LOG.warn("HTTP principal: {} is invalid for SPNEGO!",
+ spnegoPrincipal);
+ }
}
try {
- gssManager = Subject.doAs(serverSubject, new PrivilegedExceptionAction() {
-
- @Override
- public GSSManager run() throws Exception {
- return GSSManager.getInstance();
- }
- });
+ gssManager = Subject.doAs(serverSubject,
+ new PrivilegedExceptionAction() {
+ @Override
+ public GSSManager run() throws Exception {
+ return GSSManager.getInstance();
+ }
+ });
} catch (PrivilegedActionException ex) {
throw ex.getException();
}
@@ -312,91 +371,84 @@ public boolean managementOperation(AuthenticationToken token,
}
/**
- * It enforces the the Kerberos SPNEGO authentication sequence returning an {@link AuthenticationToken} only
- * after the Kerberos SPNEGO sequence has completed successfully.
+ * It enforces the the Kerberos SPNEGO authentication sequence returning an
+ * {@link AuthenticationToken} only after the Kerberos SPNEGO sequence has
+ * completed successfully.
*
* @param request the HTTP client request.
* @param response the HTTP client response.
*
- * @return an authentication token if the Kerberos SPNEGO sequence is complete and valid,
- * null if it is in progress (in this case the handler handles the response to the client).
+ * @return an authentication token if the Kerberos SPNEGO sequence is complete
+ * and valid, null if it is in progress (in this case the handler
+ * handles the response to the client).
*
* @throws IOException thrown if an IO error occurred.
* @throws AuthenticationException thrown if Kerberos SPNEGO sequence failed.
*/
@Override
- public AuthenticationToken authenticate(HttpServletRequest request, final HttpServletResponse response)
- throws IOException, AuthenticationException {
+ public AuthenticationToken authenticate(HttpServletRequest request,
+ final HttpServletResponse response)
+ throws IOException, AuthenticationException {
AuthenticationToken token = null;
- String authorization = request.getHeader(KerberosAuthenticator.AUTHORIZATION);
+ String authorization = request.getHeader(
+ KerberosAuthenticator.AUTHORIZATION);
- if (authorization == null || !authorization.startsWith(KerberosAuthenticator.NEGOTIATE)) {
+ if (authorization == null
+ || !authorization.startsWith(KerberosAuthenticator.NEGOTIATE)) {
response.setHeader(WWW_AUTHENTICATE, KerberosAuthenticator.NEGOTIATE);
response.setStatus(HttpServletResponse.SC_UNAUTHORIZED);
if (authorization == null) {
- LOG.trace("SPNEGO starting");
+ LOG.trace("SPNEGO starting for url: {}", request.getRequestURL());
} else {
- LOG.warn("'" + KerberosAuthenticator.AUTHORIZATION + "' does not start with '" +
+ LOG.warn("'" + KerberosAuthenticator.AUTHORIZATION +
+ "' does not start with '" +
KerberosAuthenticator.NEGOTIATE + "' : {}", authorization);
}
} else {
- authorization = authorization.substring(KerberosAuthenticator.NEGOTIATE.length()).trim();
+ authorization = authorization.substring(
+ KerberosAuthenticator.NEGOTIATE.length()).trim();
final Base64 base64 = new Base64(0);
final byte[] clientToken = base64.decode(authorization);
final String serverName = InetAddress.getByName(request.getServerName())
.getCanonicalHostName();
try {
- token = Subject.doAs(serverSubject, new PrivilegedExceptionAction() {
-
- @Override
- public AuthenticationToken run() throws Exception {
- AuthenticationToken token = null;
- GSSContext gssContext = null;
- GSSCredential gssCreds = null;
- try {
- gssCreds = gssManager.createCredential(
- gssManager.createName(
- KerberosUtil.getServicePrincipal("HTTP", serverName),
- KerberosUtil.getOidInstance("NT_GSS_KRB5_PRINCIPAL")),
- GSSCredential.INDEFINITE_LIFETIME,
- new Oid[]{
- KerberosUtil.getOidInstance("GSS_SPNEGO_MECH_OID"),
- KerberosUtil.getOidInstance("GSS_KRB5_MECH_OID")},
- GSSCredential.ACCEPT_ONLY);
- gssContext = gssManager.createContext(gssCreds);
- byte[] serverToken = gssContext.acceptSecContext(clientToken, 0, clientToken.length);
- if (serverToken != null && serverToken.length > 0) {
- String authenticate = base64.encodeToString(serverToken);
- response.setHeader(KerberosAuthenticator.WWW_AUTHENTICATE,
- KerberosAuthenticator.NEGOTIATE + " " + authenticate);
+ token = Subject.doAs(serverSubject,
+ new PrivilegedExceptionAction() {
+ private Set serverPrincipals =
+ serverPrincipalMap.get(serverName);
+ @Override
+ public AuthenticationToken run() throws Exception {
+ if (LOG.isTraceEnabled()) {
+ LOG.trace("SPNEGO with principals: {}",
+ serverPrincipals.toString());
+ }
+ AuthenticationToken token = null;
+ Exception lastException = null;
+ for (String serverPrincipal : serverPrincipals) {
+ try {
+ token = runWithPrincipal(serverPrincipal, clientToken,
+ base64, response);
+ } catch (Exception ex) {
+ lastException = ex;
+ LOG.trace("Auth {} failed with {}", serverPrincipal, ex);
+ } finally {
+ if (token != null) {
+ LOG.trace("Auth {} successfully", serverPrincipal);
+ break;
+ }
+ }
+ }
+ if (token != null) {
+ return token;
+ } else {
+ throw new AuthenticationException(lastException);
+ }
}
- if (!gssContext.isEstablished()) {
- response.setStatus(HttpServletResponse.SC_UNAUTHORIZED);
- LOG.trace("SPNEGO in progress");
- } else {
- String clientPrincipal = gssContext.getSrcName().toString();
- KerberosName kerberosName = new KerberosName(clientPrincipal);
- String userName = kerberosName.getShortName();
- token = new AuthenticationToken(userName, clientPrincipal, getType());
- response.setStatus(HttpServletResponse.SC_OK);
- LOG.trace("SPNEGO completed for principal [{}]", clientPrincipal);
- }
- } finally {
- if (gssContext != null) {
- gssContext.dispose();
- }
- if (gssCreds != null) {
- gssCreds.dispose();
- }
- }
- return token;
- }
- });
+ });
} catch (PrivilegedActionException ex) {
if (ex.getException() instanceof IOException) {
throw (IOException) ex.getException();
- }
- else {
+ } else {
throw new AuthenticationException(ex.getException());
}
}
@@ -404,4 +456,51 @@ public AuthenticationToken run() throws Exception {
return token;
}
+ private AuthenticationToken runWithPrincipal(String serverPrincipal,
+ byte[] clientToken, Base64 base64, HttpServletResponse response) throws
+ IOException, AuthenticationException, ClassNotFoundException,
+ GSSException, IllegalAccessException, NoSuchFieldException {
+ GSSContext gssContext = null;
+ GSSCredential gssCreds = null;
+ AuthenticationToken token = null;
+ try {
+ LOG.trace("SPNEGO initiated with principal {}", serverPrincipal);
+ gssCreds = this.gssManager.createCredential(
+ this.gssManager.createName(serverPrincipal,
+ KerberosUtil.getOidInstance("NT_GSS_KRB5_PRINCIPAL")),
+ GSSCredential.INDEFINITE_LIFETIME,
+ new Oid[]{
+ KerberosUtil.getOidInstance("GSS_SPNEGO_MECH_OID"),
+ KerberosUtil.getOidInstance("GSS_KRB5_MECH_OID")},
+ GSSCredential.ACCEPT_ONLY);
+ gssContext = this.gssManager.createContext(gssCreds);
+ byte[] serverToken = gssContext.acceptSecContext(clientToken, 0,
+ clientToken.length);
+ if (serverToken != null && serverToken.length > 0) {
+ String authenticate = base64.encodeToString(serverToken);
+ response.setHeader(KerberosAuthenticator.WWW_AUTHENTICATE,
+ KerberosAuthenticator.NEGOTIATE + " " +
+ authenticate);
+ }
+ if (!gssContext.isEstablished()) {
+ response.setStatus(HttpServletResponse.SC_UNAUTHORIZED);
+ LOG.trace("SPNEGO in progress");
+ } else {
+ String clientPrincipal = gssContext.getSrcName().toString();
+ KerberosName kerberosName = new KerberosName(clientPrincipal);
+ String userName = kerberosName.getShortName();
+ token = new AuthenticationToken(userName, clientPrincipal, getType());
+ response.setStatus(HttpServletResponse.SC_OK);
+ LOG.trace("SPNEGO completed for principal [{}]", clientPrincipal);
+ }
+ } finally {
+ if (gssContext != null) {
+ gssContext.dispose();
+ }
+ if (gssCreds != null) {
+ gssCreds.dispose();
+ }
+ }
+ return token;
+ }
}