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package sun.security.util;

import java.io.File;
import java.io.FileInputStream;
import java.security.AccessController;
import java.security.KeyStore;
import java.security.PrivilegedAction;
import java.security.cert.X509Certificate;
import java.util.Collections;
import java.util.Enumeration;
import java.util.HashSet;
import java.util.Set;

import sun.security.x509.X509CertImpl;

The purpose of this class is to determine the trust anchor certificates is in the cacerts file. This is used for PKIX CertPath checking.
/** * The purpose of this class is to determine the trust anchor certificates is in * the cacerts file. This is used for PKIX CertPath checking. */
public class AnchorCertificates { private static final Debug debug = Debug.getInstance("certpath"); private static final String HASH = "SHA-256"; private static Set<String> certs = Collections.emptySet(); static { AccessController.doPrivileged(new PrivilegedAction<Void>() { @Override public Void run() { File f = new File(System.getProperty("java.home"), "lib/security/cacerts"); KeyStore cacerts; try { cacerts = KeyStore.getInstance("JKS"); FileInputStream fis = new FileInputStream(f); try { cacerts.load(fis, null); certs = new HashSet<String>(); Enumeration<String> list = cacerts.aliases(); String alias; while (list.hasMoreElements()) { alias = list.nextElement(); // Check if this cert is labeled a trust anchor. if (alias.contains(" [jdk")) { X509Certificate cert = (X509Certificate) cacerts .getCertificate(alias); certs.add(X509CertImpl.getFingerprint(HASH, cert)); } } } finally { if (fis != null) { fis.close(); } } } catch (Exception e) { if (debug != null) { debug.println("Error parsing cacerts"); } e.printStackTrace(); } return null; } }); }
Checks if a certificate is a trust anchor.
Params:
  • cert – the certificate to check
Returns:true if the certificate is trusted.
/** * Checks if a certificate is a trust anchor. * * @param cert the certificate to check * @return true if the certificate is trusted. */
public static boolean contains(X509Certificate cert) { String key = X509CertImpl.getFingerprint(HASH, cert); boolean result = certs.contains(key); if (result && debug != null) { debug.println("AnchorCertificate.contains: matched " + cert.getSubjectDN()); } return result; } private AnchorCertificates() {} }