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AspectJ tools most notably contains the AspectJ compiler (AJC). AJC applies aspects to Java classes during compilation, fully replacing Javac for plain Java classes and also compiling native AspectJ or annotation-based @AspectJ syntax. Furthermore, AJC can weave aspects into existing class files in a post-compile binary weaving step. This library is a superset of AspectJ weaver and hence also of AspectJ runtime.

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/*******************************************************************************
 * Copyright (c) 2005, 2012 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.osgi.signedcontent;

import java.security.cert.Certificate;

/**
 * A SignerInfo object represents a single signer chain.
 * 
 * This interface is not intended to be implemented by clients.
 * 
 * @since 3.4
 * @noimplement This interface is not intended to be implemented by clients.
 */
public interface SignerInfo {

	/**
	 * Returns the certificate chain
	 * @return the certificate chain
	 */
	public Certificate[] getCertificateChain();

	/**
	 * Returns the certificate trust anchor used to establish authenticity.
	 * If authenticity cannot be established then null is returned.
	 * @return the trust anchor
	 */
	public Certificate getTrustAnchor();

	/**
	 * Returns true if the trust anchor has been authenticated.  This is a convenience
	 * method equivalent to calling {@link #getTrustAnchor()} != null
	 * @return true if the the signer info is trusted
	 */
	public boolean isTrusted();

	/**
	 * Returns the MessageDigest algorithm used to verify content
	 * signed by this signer info.
	 * 
	 * @return the algorithm
	 * @deprecated This information is not readily available using the JAR APIs
	 *             included with Java. A value {@literal unknown} will be returned.
	 */
	public String getMessageDigestAlgorithm();

}