| /* |
| * Copyright (c) 1996, 2009, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package sun.security.x509; |
| |
| import java.io.IOException; |
| import java.security.cert.X509Certificate; |
| import java.security.cert.CertificateException; |
| import java.security.cert.CertificateEncodingException; |
| import java.security.*; |
| import java.util.Date; |
| |
| import sun.security.pkcs.PKCS10; |
| |
| |
| /** |
| * Generate a pair of keys, and provide access to them. This class is |
| * provided primarily for ease of use. |
| * |
| * <P>This provides some simple certificate management functionality. |
| * Specifically, it allows you to create self-signed X.509 certificates |
| * as well as PKCS 10 based certificate signing requests. |
| * |
| * <P>Keys for some public key signature algorithms have algorithm |
| * parameters, such as DSS/DSA. Some sites' Certificate Authorities |
| * adopt fixed algorithm parameters, which speeds up some operations |
| * including key generation and signing. <em>At this time, this interface |
| * does not provide a way to provide such algorithm parameters, e.g. |
| * by providing the CA certificate which includes those parameters.</em> |
| * |
| * <P>Also, note that at this time only signature-capable keys may be |
| * acquired through this interface. Diffie-Hellman keys, used for secure |
| * key exchange, may be supported later. |
| * |
| * @author David Brownell |
| * @author Hemma Prafullchandra |
| * @see PKCS10 |
| * @see X509CertImpl |
| */ |
| public final class CertAndKeyGen { |
| /** |
| * Creates a CertAndKeyGen object for a particular key type |
| * and signature algorithm. |
| * |
| * @param keyType type of key, e.g. "RSA", "DSA" |
| * @param sigAlg name of the signature algorithm, e.g. "MD5WithRSA", |
| * "MD2WithRSA", "SHAwithDSA". |
| * @exception NoSuchAlgorithmException on unrecognized algorithms. |
| */ |
| public CertAndKeyGen (String keyType, String sigAlg) |
| throws NoSuchAlgorithmException |
| { |
| keyGen = KeyPairGenerator.getInstance(keyType); |
| this.sigAlg = sigAlg; |
| } |
| |
| /** |
| * Creates a CertAndKeyGen object for a particular key type, |
| * signature algorithm, and provider. |
| * |
| * @param keyType type of key, e.g. "RSA", "DSA" |
| * @param sigAlg name of the signature algorithm, e.g. "MD5WithRSA", |
| * "MD2WithRSA", "SHAwithDSA". |
| * @param providerName name of the provider |
| * @exception NoSuchAlgorithmException on unrecognized algorithms. |
| * @exception NoSuchProviderException on unrecognized providers. |
| */ |
| public CertAndKeyGen (String keyType, String sigAlg, String providerName) |
| throws NoSuchAlgorithmException, NoSuchProviderException |
| { |
| if (providerName == null) { |
| keyGen = KeyPairGenerator.getInstance(keyType); |
| } else { |
| try { |
| keyGen = KeyPairGenerator.getInstance(keyType, providerName); |
| } catch (Exception e) { |
| // try first available provider instead |
| keyGen = KeyPairGenerator.getInstance(keyType); |
| } |
| } |
| this.sigAlg = sigAlg; |
| } |
| |
| /** |
| * Sets the source of random numbers used when generating keys. |
| * If you do not provide one, a system default facility is used. |
| * You may wish to provide your own source of random numbers |
| * to get a reproducible sequence of keys and signatures, or |
| * because you may be able to take advantage of strong sources |
| * of randomness/entropy in your environment. |
| */ |
| public void setRandom (SecureRandom generator) |
| { |
| prng = generator; |
| } |
| |
| // want "public void generate (X509Certificate)" ... inherit DSA/D-H param |
| |
| /** |
| * Generates a random public/private key pair, with a given key |
| * size. Different algorithms provide different degrees of security |
| * for the same key size, because of the "work factor" involved in |
| * brute force attacks. As computers become faster, it becomes |
| * easier to perform such attacks. Small keys are to be avoided. |
| * |
| * <P>Note that not all values of "keyBits" are valid for all |
| * algorithms, and not all public key algorithms are currently |
| * supported for use in X.509 certificates. If the algorithm |
| * you specified does not produce X.509 compatible keys, an |
| * invalid key exception is thrown. |
| * |
| * @param keyBits the number of bits in the keys. |
| * @exception InvalidKeyException if the environment does not |
| * provide X.509 public keys for this signature algorithm. |
| */ |
| public void generate (int keyBits) |
| throws InvalidKeyException |
| { |
| KeyPair pair; |
| |
| try { |
| if (prng == null) { |
| prng = new SecureRandom(); |
| } |
| keyGen.initialize(keyBits, prng); |
| pair = keyGen.generateKeyPair(); |
| |
| } catch (Exception e) { |
| throw new IllegalArgumentException(e.getMessage()); |
| } |
| |
| publicKey = pair.getPublic(); |
| privateKey = pair.getPrivate(); |
| } |
| |
| |
| /** |
| * Returns the public key of the generated key pair if it is of type |
| * <code>X509Key</code>, or null if the public key is of a different type. |
| * |
| * XXX Note: This behaviour is needed for backwards compatibility. |
| * What this method really should return is the public key of the |
| * generated key pair, regardless of whether or not it is an instance of |
| * <code>X509Key</code>. Accordingly, the return type of this method |
| * should be <code>PublicKey</code>. |
| */ |
| public X509Key getPublicKey() |
| { |
| if (!(publicKey instanceof X509Key)) { |
| return null; |
| } |
| return (X509Key)publicKey; |
| } |
| |
| |
| /** |
| * Returns the private key of the generated key pair. |
| * |
| * <P><STRONG><em>Be extremely careful when handling private keys. |
| * When private keys are not kept secret, they lose their ability |
| * to securely authenticate specific entities ... that is a huge |
| * security risk!</em></STRONG> |
| */ |
| public PrivateKey getPrivateKey () |
| { |
| return privateKey; |
| } |
| |
| |
| /** |
| * Returns a self-signed X.509v3 certificate for the public key. |
| * The certificate is immediately valid. No extensions. |
| * |
| * <P>Such certificates normally are used to identify a "Certificate |
| * Authority" (CA). Accordingly, they will not always be accepted by |
| * other parties. However, such certificates are also useful when |
| * you are bootstrapping your security infrastructure, or deploying |
| * system prototypes. |
| * |
| * @param myname X.500 name of the subject (who is also the issuer) |
| * @param firstDate the issue time of the certificate |
| * @param validity how long the certificate should be valid, in seconds |
| * @exception CertificateException on certificate handling errors. |
| * @exception InvalidKeyException on key handling errors. |
| * @exception SignatureException on signature handling errors. |
| * @exception NoSuchAlgorithmException on unrecognized algorithms. |
| * @exception NoSuchProviderException on unrecognized providers. |
| */ |
| public X509Certificate getSelfCertificate ( |
| X500Name myname, Date firstDate, long validity) |
| throws CertificateException, InvalidKeyException, SignatureException, |
| NoSuchAlgorithmException, NoSuchProviderException |
| { |
| X509CertImpl cert; |
| Date lastDate; |
| |
| try { |
| lastDate = new Date (); |
| lastDate.setTime (firstDate.getTime () + validity * 1000); |
| |
| CertificateValidity interval = |
| new CertificateValidity(firstDate,lastDate); |
| |
| X509CertInfo info = new X509CertInfo(); |
| // Add all mandatory attributes |
| info.set(X509CertInfo.VERSION, |
| new CertificateVersion(CertificateVersion.V3)); |
| info.set(X509CertInfo.SERIAL_NUMBER, new CertificateSerialNumber( |
| new java.util.Random().nextInt() & 0x7fffffff)); |
| AlgorithmId algID = AlgorithmId.getAlgorithmId(sigAlg); |
| info.set(X509CertInfo.ALGORITHM_ID, |
| new CertificateAlgorithmId(algID)); |
| info.set(X509CertInfo.SUBJECT, new CertificateSubjectName(myname)); |
| info.set(X509CertInfo.KEY, new CertificateX509Key(publicKey)); |
| info.set(X509CertInfo.VALIDITY, interval); |
| info.set(X509CertInfo.ISSUER, new CertificateIssuerName(myname)); |
| |
| cert = new X509CertImpl(info); |
| cert.sign(privateKey, this.sigAlg); |
| |
| return (X509Certificate)cert; |
| |
| } catch (IOException e) { |
| throw new CertificateEncodingException("getSelfCert: " + |
| e.getMessage()); |
| } |
| } |
| |
| // Keep the old method |
| public X509Certificate getSelfCertificate (X500Name myname, long validity) |
| throws CertificateException, InvalidKeyException, SignatureException, |
| NoSuchAlgorithmException, NoSuchProviderException |
| { |
| return getSelfCertificate(myname, new Date(), validity); |
| } |
| |
| /** |
| * Returns a PKCS #10 certificate request. The caller uses either |
| * <code>PKCS10.print</code> or <code>PKCS10.toByteArray</code> |
| * operations on the result, to get the request in an appropriate |
| * transmission format. |
| * |
| * <P>PKCS #10 certificate requests are sent, along with some proof |
| * of identity, to Certificate Authorities (CAs) which then issue |
| * X.509 public key certificates. |
| * |
| * @param myname X.500 name of the subject |
| * @exception InvalidKeyException on key handling errors. |
| * @exception SignatureException on signature handling errors. |
| */ |
| public PKCS10 getCertRequest (X500Name myname) |
| throws InvalidKeyException, SignatureException |
| { |
| PKCS10 req = new PKCS10 (publicKey); |
| |
| try { |
| Signature signature = Signature.getInstance(sigAlg); |
| signature.initSign (privateKey); |
| req.encodeAndSign(myname, signature); |
| |
| } catch (CertificateException e) { |
| throw new SignatureException (sigAlg + " CertificateException"); |
| |
| } catch (IOException e) { |
| throw new SignatureException (sigAlg + " IOException"); |
| |
| } catch (NoSuchAlgorithmException e) { |
| // "can't happen" |
| throw new SignatureException (sigAlg + " unavailable?"); |
| } |
| return req; |
| } |
| |
| private SecureRandom prng; |
| private String sigAlg; |
| private KeyPairGenerator keyGen; |
| private PublicKey publicKey; |
| private PrivateKey privateKey; |
| } |
