org.wildfly.security.auth.realm.JaasSecurityRealm Maven / Gradle / Ivy
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/*
* JBoss, Home of Professional Open Source.
* Copyright 2014 Red Hat, Inc., and individual contributors
* as indicated by the @author tags.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.wildfly.security.auth.realm;
import static org.wildfly.security.auth.realm.ElytronMessages.log;
import javax.security.auth.Subject;
import javax.security.auth.callback.Callback;
import javax.security.auth.callback.CallbackHandler;
import javax.security.auth.callback.NameCallback;
import javax.security.auth.callback.PasswordCallback;
import javax.security.auth.callback.UnsupportedCallbackException;
import javax.security.auth.login.Configuration;
import javax.security.auth.login.LoginContext;
import javax.security.auth.login.LoginException;
import java.io.File;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.net.URI;
import java.nio.file.Paths;
import java.security.NoSuchAlgorithmException;
import java.security.Principal;
import java.security.Security;
import java.security.URIParameter;
import java.security.spec.AlgorithmParameterSpec;
import org.wildfly.common.Assert;
import org.wildfly.security.auth.callback.CredentialCallback;
import org.wildfly.security.auth.principal.NamePrincipal;
import org.wildfly.security.authz.Attributes;
import org.wildfly.security.authz.AuthorizationIdentity;
import org.wildfly.security.auth.server.RealmIdentity;
import org.wildfly.security.auth.server.RealmUnavailableException;
import org.wildfly.security.auth.server.SecurityRealm;
import org.wildfly.security.auth.SupportLevel;
import org.wildfly.security.authz.MapAttributes;
import org.wildfly.security.credential.Credential;
import org.wildfly.security.evidence.Evidence;
import org.wildfly.security.evidence.PasswordGuessEvidence;
/**
* A JAAS based {@link SecurityRealm} implementation.
*
* @author Stefan Guilhen
*/
public class JaasSecurityRealm implements SecurityRealm {
private static final String DEFAULT_CONFIGURATION_POLICY_TYPE = "JavaLoginConfig";
private final URI jaasConfigFilePath;
private final String entry;
private final CallbackHandler handler;
private final ClassLoader classLoader;
/**
* Construct a new instance.
*
* @param entry JAAS configuration file entry (must not be {@code null})
*/
public JaasSecurityRealm(final String entry) {
this(entry, (String) null);
}
/**
* Construct a new instance.
*
* @param entry JAAS configuration file entry (must not be {@code null})
* @param classLoader classLoader to use with LoginContext, this class loader must contain LoginModule CallbackHandler classes
*/
public JaasSecurityRealm(final String entry, final ClassLoader classLoader) {
this(entry, null, classLoader);
}
/**
* Construct a new instance.
*
* @param entry JAAS configuration file entry (must not be {@code null})
* @param jaasConfigFilePath path to JAAS configuration file
*/
public JaasSecurityRealm(final String entry, final String jaasConfigFilePath) {
this(entry, jaasConfigFilePath, null);
}
/**
* Construct a new instance.
*
* @param entry JAAS configuration file entry (must not be {@code null})
* @param jaasConfigFilePath path to JAAS configuration file
* @param classLoader classLoader to use with LoginContext, this class loader must contain LoginModule CallbackHandler classes
*/
public JaasSecurityRealm(final String entry, final String jaasConfigFilePath, final ClassLoader classLoader) {
this(entry, jaasConfigFilePath, classLoader, null);
}
/**
* Construct a new instance.
*
* @param entry JAAS configuration file entry (must not be {@code null})
* @param jaasConfigFilePath path to JAAS configuration file
* @param callbackHandler callbackHandler to pass to LoginContext
* @param classLoader classLoader to use with LoginContext, this class loader must contain LoginModule CallbackHandler classes
*/
public JaasSecurityRealm(final String entry, final String jaasConfigFilePath, final ClassLoader classLoader, final CallbackHandler callbackHandler) {
Assert.checkNotNullParam("entry", entry);
if (jaasConfigFilePath != null) {
this.jaasConfigFilePath = Paths.get(jaasConfigFilePath).toUri();
} else {
this.jaasConfigFilePath = null;
}
this.entry = entry;
this.handler = callbackHandler;
if (classLoader != null) {
this.classLoader = classLoader;
} else {
this.classLoader = Thread.currentThread().getContextClassLoader();
}
}
@Override
public RealmIdentity getRealmIdentity(final Principal principal) {
if (principal instanceof NamePrincipal) {
return new JaasRealmIdentity(principal);
} else {
NamePrincipal namePrincipal = NamePrincipal.from(principal);
return namePrincipal != null ? new JaasRealmIdentity(namePrincipal) : RealmIdentity.NON_EXISTENT;
}
}
@Override
public SupportLevel getCredentialAcquireSupport(final Class credentialType, final String algorithmName, final AlgorithmParameterSpec parameterSpec) throws RealmUnavailableException {
Assert.checkNotNullParam("credentialType", credentialType);
return SupportLevel.UNSUPPORTED;
}
@Override
public SupportLevel getEvidenceVerifySupport(final Class evidenceType, final String algorithmName) throws RealmUnavailableException {
Assert.checkNotNullParam("evidenceType", evidenceType);
return SupportLevel.POSSIBLY_SUPPORTED;
}
private class JaasRealmIdentity implements RealmIdentity {
private final Principal principal;
private LoginContext loginContext;
private Subject subject;
private JaasRealmIdentity(final Principal principal) {
this.principal = principal;
}
public Principal getRealmIdentityPrincipal() {
return principal;
}
public Subject getSubject() {
return subject;
}
@Override
public SupportLevel getCredentialAcquireSupport(final Class credentialType, final String algorithmName, final AlgorithmParameterSpec parameterSpec) throws RealmUnavailableException {
return JaasSecurityRealm.this.getCredentialAcquireSupport(credentialType, algorithmName, parameterSpec);
}
@Override
public C getCredential(final Class credentialType) throws RealmUnavailableException {
return getCredential(credentialType, null);
}
@Override
public C getCredential(final Class credentialType, final String algorithmName) throws RealmUnavailableException {
return getCredential(credentialType, algorithmName, null);
}
@Override
public C getCredential(final Class credentialType, final String algorithmName, final AlgorithmParameterSpec parameterSpec) throws RealmUnavailableException {
return null;
}
@Override
public SupportLevel getEvidenceVerifySupport(final Class evidenceType, final String algorithmName) throws RealmUnavailableException {
Assert.checkNotNullParam("evidenceType", evidenceType);
return JaasSecurityRealm.this.getEvidenceVerifySupport(evidenceType, algorithmName);
}
@Override
public boolean verifyEvidence(final Evidence evidence) throws RealmUnavailableException {
Assert.checkNotNullParam("evidence", evidence);
this.subject = null;
boolean successfulLogin;
ClassLoader oldClassLoader = Thread.currentThread().getContextClassLoader();
try {
if (classLoader != null) {
Thread.currentThread().setContextClassLoader(classLoader);
}
final CallbackHandler callbackHandler = createCallbackHandler(principal, evidence);
final Subject subject = new Subject();
loginContext = createLoginContext(entry, subject, callbackHandler);
log.tracef("Trying to authenticate subject %s using LoginContext %s using JaasSecurityRealm", principal, loginContext);
try {
loginContext.login();
successfulLogin = true;
this.subject = loginContext.getSubject();
} catch (LoginException loginException) {
successfulLogin = false;
ElytronMessages.log.debugInfoJaasAuthenticationFailure(principal, loginException);
}
} finally {
Thread.currentThread().setContextClassLoader(oldClassLoader);
}
return successfulLogin;
}
public boolean exists() {
/* we don't really know that the identity exists, but we know that there is always
* an authorization identity so that's as good as {@code true}
*/
return true;
}
@Override
public AuthorizationIdentity getAuthorizationIdentity() throws RealmUnavailableException {
return JaasAuthorizationIdentity.fromSubject(subject);
}
@Override
public void dispose() {
// call logout in order to empty the subject
ClassLoader oldClassLoader = Thread.currentThread().getContextClassLoader();
try {
try {
if (classLoader != null) {
Thread.currentThread().setContextClassLoader(classLoader);
}
if (loginContext != null) {
loginContext.logout();
}
} catch (LoginException e) {
ElytronMessages.log.debugInfoJaasLogoutFailure(this.principal, e);
}
} finally {
Thread.currentThread().setContextClassLoader(oldClassLoader);
}
}
/**
* @param entry login configuration file entry
* @param subject classLoader to use with LoginContext, this class loader must contain LoginModule CallbackHandler classes
* @param callbackHandler callbackHandler to pass to LoginContext
* @return the instance of LoginContext
* @throws RealmUnavailableException
*/
private LoginContext createLoginContext(final String entry, final Subject subject, final CallbackHandler callbackHandler) throws RealmUnavailableException {
if (jaasConfigFilePath != null) {
File file = new File(jaasConfigFilePath);
if (!file.exists() && !file.isDirectory()) {
throw ElytronMessages.log.failedToLoadJaasConfigFile();
}
}
try {
if (jaasConfigFilePath == null) {
return new LoginContext(entry, subject, callbackHandler);
} else {
return new LoginContext(entry, subject, callbackHandler, Configuration.getInstance(DEFAULT_CONFIGURATION_POLICY_TYPE, new URIParameter(jaasConfigFilePath)));
}
} catch (LoginException | NoSuchAlgorithmException le) {
throw ElytronMessages.log.failedToCreateLoginContext(le);
}
}
private CallbackHandler createCallbackHandler(final Principal principal, final Evidence evidence) {
if (handler != null) {
try {
final CallbackHandler callbackHandler = handler.getClass().getConstructor().newInstance();
// custom handlers were allowed in the past as long as they had a public setSecurityInfo method. Use this method if it exists
final Method setSecurityInfo = handler.getClass().getMethod("setSecurityInfo", Principal.class, Object.class);
setSecurityInfo.invoke(callbackHandler, principal, evidence);
return callbackHandler;
} catch (InstantiationException | IllegalAccessException | NoSuchMethodException | InvocationTargetException e) {
// ignore if this method does not exist
return handler;
}
} else if (Security.getProperty("auth.login.defaultCallbackHandler") != null) {
// security property "auth.login.defaultCallbackHandler" is not null so LoginContext will initialize it itself
return null;
} else {
return new JaasSecurityRealmDefaultCallbackHandler(principal, evidence);
}
}
}
/**
* Default CallbackHandler passed to the LoginContext when none is provided to JAAS security realm and none is configured in the "auth.login.defaultCallbackHandler" security property.
*/
private static class JaasSecurityRealmDefaultCallbackHandler implements CallbackHandler {
private final Principal principal;
private final Object evidence;
private JaasSecurityRealmDefaultCallbackHandler(final Principal principal, final Evidence evidence) {
this.principal = principal;
this.evidence = evidence;
}
@Override
public void handle(Callback[] callbacks) throws UnsupportedCallbackException {
Assert.checkNotNullParam("callbacks", callbacks);
for (Callback callback : callbacks) {
if (callback instanceof NameCallback) {
NameCallback nc = (NameCallback) callback;
if (principal != null)
nc.setName(principal.getName());
} else if (callback instanceof PasswordCallback) {
if (evidence instanceof PasswordGuessEvidence) {
((PasswordCallback) callback).setPassword(((PasswordGuessEvidence) evidence).getGuess());
} else {
PasswordCallback pc = (PasswordCallback) callback;
char[] password = getPassword();
if (password != null)
pc.setPassword(password);
}
} else if (callback instanceof CredentialCallback && evidence instanceof Credential) {
final CredentialCallback credentialCallback = (CredentialCallback) callback;
Credential credential = (Credential) evidence;
if (credentialCallback.isCredentialSupported(credential)) {
credentialCallback.setCredential(credential);
}
} else {
throw ElytronMessages.log.unableToHandleCallback(callback, this.getClass().getName(), callback.getClass().getCanonicalName());
}
}
}
/**
* Source: A utility method for obtaining of password taken from
* https://github.com/picketbox/picketbox/blob/master/security-jboss-sx/jbosssx/src/main/java/org/jboss/security/auth/callback/JBossCallbackHandler.java
* on November 2021
*
* Try to convert the credential value into a char[] using the
* first of the following attempts which succeeds:
*
* 1. Check for instanceof char[]
* 2. Check for instanceof String and then use toCharArray()
* 3. See if credential has a toCharArray() method and use it
* 4. Use toString() followed by toCharArray().
*
* @return a char[] representation of the credential.
*/
private char[] getPassword() {
char[] password = null;
if (evidence instanceof char[]) {
password = (char[]) evidence;
} else if (evidence instanceof String) {
String s = (String) evidence;
password = s.toCharArray();
} else {
try {
Class[] types = {};
Method m = evidence.getClass().getMethod("toCharArray", types);
Object[] args = {};
password = (char[]) m.invoke(evidence, args);
} catch (Exception e) {
if (evidence != null) {
String s = evidence.toString();
password = s.toCharArray();
}
}
}
return password;
}
}
/**
* A JAAS realm's authorization identity. Roles are mapped from all Subject's principals with the following rule:
* key of the attribute is principal's simple classname and the value is principal's name
*/
private static class JaasAuthorizationIdentity implements AuthorizationIdentity {
private MapAttributes attributes;
private static JaasAuthorizationIdentity fromSubject(final Subject subject) {
MapAttributes attributes = new MapAttributes();
// map all subject's principals to attributes with the following rule:
// key of the attribute is principal's simple classname and the value is principal's name
if (subject != null) {
for (Principal principal : subject.getPrincipals()) {
attributes.addLast(principal.getClass().getSimpleName(), principal.getName());
}
}
return new JaasAuthorizationIdentity(attributes);
}
private JaasAuthorizationIdentity(MapAttributes attributes) {
this.attributes = attributes;
}
@Override
public Attributes getAttributes() {
return attributes;
}
}
}