Java

Load a Public Key from a String

Demonstrates the Chilkat PublicKey.LoadFromString method, which loads a public key from a string. The only argument is the string. Chilkat examines the content and recognizes PEM public keys, unencrypted PEM private keys (taking only the public portion), XML, JWK, and more.

Background: This is the forgiving text loader: rather than requiring you to know the exact format, it inspects whatever string you provide and figures it out. A useful convenience is that it accepts an unencrypted private key too and keeps only the public half — handy when you have a key pair but need just the public key. Use it whenever the textual format is uncertain or varies by source.

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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;

    //  Demonstrates the PublicKey.LoadFromString method, which loads a public key from a string.  The
    //  only argument is the string.  Chilkat examines the content and recognizes PEM public keys,
    //  unencrypted PEM private keys (using only the public portion), XML, JWK, and more.

    CkPublicKey pubKey = new CkPublicKey();

    //  The PEM text of a public key.
    String keyText = "-----BEGIN PUBLIC KEY-----\nMIIBIjANBgkq...IDAQAB\n-----END PUBLIC KEY-----";

    success = pubKey.LoadFromString(keyText);
    if (success == false) {
        System.out.println(pubKey.lastErrorText());
        return;
        }

    System.out.println("Loaded a " + pubKey.keyType() + " public key.");
  }
}