/*
* Returns the list of root certificates
* The list of certificates we received is an array of certificates
* we have to determine
* 1) how many chain do we have (a chain stops when verifier of a cert is
* not the signer of the next cert in the list
* 2) build a cert with the leaf signer and the root verifier for each chain
*/
public CertificatePair[] getRootCertificates() {
if (rootCertificates == null) {
rootCertificates = new CertificatePair[0];
List rootCertificatesList = new ArrayList();
if (certificates != null && certificates.size() > 0) {
Iterator iter = certificates.iterator();
while (iter.hasNext()) {
Certificate[] certs = (Certificate[]) iter.next();
if (certs != null && certs.length > 0) {
CertificatePair pair = new CertificatePair();
pair.setIssuer(certs[0]);
for (int i = 0; i < certs.length - 1; i++) {
X509Certificate x509certRoot = (X509Certificate) certs[i];
X509Certificate x509certIssuer = (X509Certificate) certs[i + 1];
if (!x509certRoot.getIssuerDN().equals(x509certIssuer.getSubjectDN())) {
pair.setRoot(x509certRoot);
if (!rootCertificatesList.contains(pair)) {
rootCertificatesList.add(pair);
}
pair = new CertificatePair();
pair.setIssuer(x509certIssuer);
}
}
// add the latest one
if (pair != null) {
pair.setRoot(certs[certs.length - 1]);
if (!rootCertificatesList.contains(pair)) {
rootCertificatesList.add(pair);
}
}
}
}
}
if (rootCertificatesList.size() > 0) {
rootCertificates = new CertificatePair[rootCertificatesList.size()];
rootCertificatesList.toArray(rootCertificates);
}
}
return rootCertificates;
}
