(Java) Load Java KeyStore and Access Contents

Loads a Java keystore file and iterates over the contents. A Java keystore (.jks) file can contain one or more trusted root certificate entries and/or one or more private key entries. Each private key entry includes an associated certificate chain.

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import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[])
  {
    // This requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    CkJavaKeyStore jks = new CkJavaKeyStore();

    // Load the Java keystore from a file.  The JKS file password is used
    // to verify the keyed digest that is found at the very end of the keystore.
    // It verifies there has been no tampering with the file.
    boolean success = jks.LoadFile("jksFilePassword","/someDir/keyStore.jks");
    if (success != true) {
        System.out.println(jks.lastErrorText());
        return;
        }

    // Find out how many of each type of entry:
    int numTrustedCerts = jks.get_NumTrustedCerts();
    int numPrivateKeys = jks.get_NumPrivateKeys();

    CkCert cert;
    String alias;

    int i;

    // For each trusted certificate, access it by getting
    // it as a cert object.  Also get the alias associated with the certificate.
    System.out.println("Trusted Certs:");
    i = 0;
    while (i < numTrustedCerts) {
        cert = jks.GetTrustedCert(i);
        System.out.println(jks.getTrustedCertAlias(i) + ": " + cert.subjectDN());

        i = i+1;
        }

    CkPrivateKey privKey;
    CkCertChain certChain;

    // For each private key entry, get the private key and
    // the associated certificate chain.
    // Each private key is password protected.  Usually it is the same
    // password as used for the keyed digest of the entire JKS.  
    // However, this does not have to be.  The password is passed
    // here to handle the possibility of each private key requiring
    // a different password.
    System.out.println("Private Keys:");
    i = 0;
    while (i < numPrivateKeys) {
        privKey = jks.GetPrivateKey("jksFilePassword",i);
        System.out.println(jks.getPrivateKeyAlias(i));
        certChain = jks.GetCertChain(i);

        // The 1st certificate in the chain is the one associated with the private key.
        cert = certChain.GetCert(0);
        System.out.println(cert.subjectDN());

        i = i+1;
        }
  }
}