Java

Write PKCS1 or PKCS8 Public Key PEM

See more PEM Examples

Demonstrates how to write either PKCS1 or PKCS8 format PEM files. PKCS1 public keys have this PEM format:

-----BEGIN RSA PUBLIC KEY-----
BASE64 ENCODED DATA
-----END RSA PUBLIC KEY-----

PKCS8 public keys have this PEM format:

-----BEGIN PUBLIC KEY-----
BASE64 ENCODED DATA
-----END PUBLIC KEY-----

Java

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[])
  {
    boolean success = false;

    // This example assumes the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    success = false;

    CkPem pem = new CkPem();

    // Load a public key from a PEM file.
    // (Assume the PEM contains at least one public key..)
    success = pem.LoadPemFile("/Users/chilkat/testData/pem/myPublicKey.pem");
    if (success != true) {
        System.out.println(pem.lastErrorText());
        return;
        }

    int i;
    int numPublicKeys = pem.get_NumPublicKeys();
    if (numPublicKeys == 0) {
        System.out.println((("Error: Expected the PEM to contain public keys.")));
        return;
        }

    // Get each public key as PEM, first in PKCS1 format, then in PKCS8.
    for (i = 1; i <= numPublicKeys; i++) {

        // First output to PKCS1 PEM format:
        System.out.println("This is PKCS1 format:");
        pem.put_PublicKeyFormat("pkcs1");
        System.out.println(pem.toPem());

        // Now PKCS8 PEM format:
        System.out.println("This is PKCS8 format:");
        pem.put_PublicKeyFormat("pkcs8");
        System.out.println(pem.toPem());

        }
  }
}