Java tutorial
package org.bouncycastle.openssl.jcajce; import java.io.IOException; import java.security.Key; import java.security.KeyPair; import java.security.PrivateKey; import java.security.Provider; import java.security.PublicKey; import java.security.SecureRandom; import java.security.cert.CRLException; import java.security.cert.CertificateEncodingException; import java.security.cert.X509CRL; import java.security.cert.X509Certificate; import org.bouncycastle.asn1.pkcs.PrivateKeyInfo; import org.bouncycastle.asn1.x509.SubjectPublicKeyInfo; import org.bouncycastle.cert.jcajce.JcaX509CRLHolder; import org.bouncycastle.cert.jcajce.JcaX509CertificateHolder; import org.bouncycastle.openssl.MiscPEMGenerator; import org.bouncycastle.openssl.PEMEncryptor; /** * PEM generator for the original set of PEM objects used in Open SSL. */ public class JcaMiscPEMGenerator extends MiscPEMGenerator { private Object obj; private String algorithm; private char[] password; private SecureRandom random; private Provider provider; public JcaMiscPEMGenerator(Object o) throws IOException { super(convertObject(o)); } public JcaMiscPEMGenerator(Object o, PEMEncryptor encryptor) throws IOException { super(convertObject(o), encryptor); } private static Object convertObject(Object o) throws IOException { if (o instanceof X509Certificate) { try { return new JcaX509CertificateHolder((X509Certificate) o); } catch (CertificateEncodingException e) { throw new IllegalArgumentException("Cannot encode object: " + e.toString()); } } else if (o instanceof X509CRL) { try { return new JcaX509CRLHolder((X509CRL) o); } catch (CRLException e) { throw new IllegalArgumentException("Cannot encode object: " + e.toString()); } } else if (o instanceof KeyPair) { return convertObject(((KeyPair) o).getPrivate()); } else if (o instanceof PrivateKey) { return PrivateKeyInfo.getInstance(((Key) o).getEncoded()); } else if (o instanceof PublicKey) { return SubjectPublicKeyInfo.getInstance(((PublicKey) o).getEncoded()); } return o; } }