com.itextpdf.signatures.CertificateVerifier Maven / Gradle / Ivy
/*
This file is part of the iText (R) project.
Copyright (c) 1998-2021 iText Group NV
Authors: Bruno Lowagie, Paulo Soares, et al.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License version 3
as published by the Free Software Foundation with the addition of the
following permission added to Section 15 as permitted in Section 7(a):
FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY
ITEXT GROUP. ITEXT GROUP DISCLAIMS THE WARRANTY OF NON INFRINGEMENT
OF THIRD PARTY RIGHTS
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program; if not, see http://www.gnu.org/licenses or write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA, 02110-1301 USA, or download the license from the following URL:
http://itextpdf.com/terms-of-use/
The interactive user interfaces in modified source and object code versions
of this program must display Appropriate Legal Notices, as required under
Section 5 of the GNU Affero General Public License.
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a covered work must retain the producer line in every PDF that is created
or manipulated using iText.
You can be released from the requirements of the license by purchasing
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develop commercial activities involving the iText software without
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*/
package com.itextpdf.signatures;
import java.io.IOException;
import java.security.GeneralSecurityException;
import java.security.PublicKey;
import java.security.cert.X509Certificate;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
/**
* Superclass for a series of certificate verifiers that will typically
* be used in a chain. It wraps another CertificateVerifier
* that is the next element in the chain of which the verify()
* method will be called.
*/
public class CertificateVerifier {
/** The previous CertificateVerifier in the chain of verifiers. */
protected CertificateVerifier verifier;
/** Indicates if going online to verify a certificate is allowed. */
protected boolean onlineCheckingAllowed = true;
/**
* Creates the final CertificateVerifier in a chain of verifiers.
*
* @param verifier the previous verifier in the chain
*/
public CertificateVerifier(CertificateVerifier verifier) {
this.verifier = verifier;
}
/**
* Decide whether or not online checking is allowed.
*
* @param onlineCheckingAllowed a boolean indicating whether the certificate can be verified using online verification results.
*/
public void setOnlineCheckingAllowed(boolean onlineCheckingAllowed) {
this.onlineCheckingAllowed = onlineCheckingAllowed;
}
/**
* Checks the validity of the certificate, and calls the next
* verifier in the chain, if any.
* @param signCert the certificate that needs to be checked
* @param issuerCert its issuer
* @param signDate the date the certificate needs to be valid
* @return a list of VerificationOK objects. The list will be empty if the certificate couldn't be verified.
* @throws GeneralSecurityException thrown if the certificate has expired, isn't valid yet, or if an exception has been thrown in {@link java.security.cert.Certificate#verify(PublicKey) Certificate#verify}.
* @throws IOException Deprecated
*/
public List verify(X509Certificate signCert, X509Certificate issuerCert, Date signDate)
throws GeneralSecurityException, IOException {
// Check if the certificate is valid on the signDate
if (signDate != null)
signCert.checkValidity(signDate);
// Check if the signature is valid
if (issuerCert != null) {
signCert.verify(issuerCert.getPublicKey());
}
// Also in case, the certificate is self-signed
else {
signCert.verify(signCert.getPublicKey());
}
List result = new ArrayList<>();
if (verifier != null)
result.addAll(verifier.verify(signCert, issuerCert, signDate));
return result;
}
}