com.itextpdf.text.pdf.security.CertificateVerifier Maven / Gradle / Ivy
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package com.itextpdf.text.pdf.security;
import java.io.IOException;
import java.security.GeneralSecurityException;
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
*/
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
* @throws IOException
*/
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;
}
}