org.wildfly.security.credential.source.impl.LocalKerberosCredentialSource Maven / Gradle / Ivy
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* Copyright 2017 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.credential.source.impl;
import org.ietf.jgss.GSSCredential;
import org.ietf.jgss.GSSManager;
import org.ietf.jgss.Oid;
import org.wildfly.security.auth.SupportLevel;
import org.wildfly.security.credential.Credential;
import org.wildfly.security.credential.GSSKerberosCredential;
import org.wildfly.security.credential.source.CredentialSource;
import java.io.IOException;
import java.lang.reflect.UndeclaredThrowableException;
import java.security.AccessController;
import java.security.PrivilegedActionException;
import java.security.PrivilegedExceptionAction;
import java.security.spec.AlgorithmParameterSpec;
import static org.wildfly.security.credential.source.impl.ElytronMessages.log;
/**
* A credential source which acquires a credential from local kerberos ticket cache.
* Provides {@link org.ietf.jgss.GSSCredential} visible in {@code klist} command output etc.
*
* Successful obtaining from cache requires set system property {@code javax.security.auth.useSubjectCredsOnly} to {@code false}.
*
* @deprecated Kerberos based authentication mechanism obtains credential himself
*
* @author Jan Kalina
*/
public class LocalKerberosCredentialSource implements CredentialSource {
private final Oid[] mechanismOids;
LocalKerberosCredentialSource(Oid[] mechanismOids) {
this.mechanismOids = mechanismOids;
}
@Override
public SupportLevel getCredentialAcquireSupport(Class credentialType, String algorithmName, AlgorithmParameterSpec parameterSpec) throws IOException {
return credentialType == GSSKerberosCredential.class ? SupportLevel.SUPPORTED : SupportLevel.UNSUPPORTED;
}
@Override
public C getCredential(Class credentialType, String algorithmName, AlgorithmParameterSpec parameterSpec) throws IOException {
if (credentialType != GSSKerberosCredential.class) {
log.tracef("Unable to obtain credential of type %s from LocalKerberosCredentialSource", credentialType);
return null;
}
try {
GSSCredential gssCredential = AccessController.doPrivileged((PrivilegedExceptionAction) () -> {
GSSManager manager = GSSManager.getInstance();
return manager.createCredential(null, GSSCredential.DEFAULT_LIFETIME, mechanismOids, GSSCredential.INITIATE_ONLY);
});
log.tracef("Obtained local kerberos credential: %s", gssCredential);
if (gssCredential == null) return null;
return credentialType.cast(new GSSKerberosCredential(gssCredential));
} catch (PrivilegedActionException e) {
try {
throw e.getCause();
} catch (IOException | RuntimeException | Error e2) {
throw e2;
} catch (Throwable throwable) {
throw new UndeclaredThrowableException(throwable);
}
}
}
/**
* Construct a new builder instance.
*
* @return the new builder instance
*/
public static Builder builder() {
return new Builder();
}
/**
* A builder for a local kerberos credential source.
*/
public static final class Builder {
private Oid[] mechanismOids = null;
/**
* Set array of oid's indicating the mechanisms over which the credential is to be acquired.
* Use {@code null} to request system specific default.
*
* @param mechanismOids array of mechanism oid's
* @return this builder
*/
public Builder setMechanismOids(Oid[] mechanismOids) {
this.mechanismOids = mechanismOids;
return this;
}
/**
* Construct the credential source instance.
*
* @return the credential source
*/
public LocalKerberosCredentialSource build() {
return new LocalKerberosCredentialSource(mechanismOids);
}
}
}