author | weijun |
Tue, 07 Jun 2016 10:33:38 +0800 | |
changeset 38855 | 4e587173e37e |
parent 38439 | 8a3871cd7fca |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 1996, 2014, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package sun.security.tools.keytool; |
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import java.io.IOException; |
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import java.security.cert.X509Certificate; |
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import java.security.cert.CertificateException; |
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import java.security.cert.CertificateEncodingException; |
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import java.security.*; |
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import java.util.Date; |
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import sun.security.pkcs10.PKCS10; |
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import sun.security.x509.*; |
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/** |
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* Generate a pair of keys, and provide access to them. This class is |
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* provided primarily for ease of use. |
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* |
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* <P>This provides some simple certificate management functionality. |
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* Specifically, it allows you to create self-signed X.509 certificates |
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* as well as PKCS 10 based certificate signing requests. |
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* |
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* <P>Keys for some public key signature algorithms have algorithm |
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* parameters, such as DSS/DSA. Some sites' Certificate Authorities |
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* adopt fixed algorithm parameters, which speeds up some operations |
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* including key generation and signing. <em>At this time, this interface |
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* does not provide a way to provide such algorithm parameters, e.g. |
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* by providing the CA certificate which includes those parameters.</em> |
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* |
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* <P>Also, note that at this time only signature-capable keys may be |
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* acquired through this interface. Diffie-Hellman keys, used for secure |
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* key exchange, may be supported later. |
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* |
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* @author David Brownell |
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* @author Hemma Prafullchandra |
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* @see PKCS10 |
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* @see X509CertImpl |
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*/ |
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public final class CertAndKeyGen { |
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/** |
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* Creates a CertAndKeyGen object for a particular key type |
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* and signature algorithm. |
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* |
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* @param keyType type of key, e.g. "RSA", "DSA" |
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* @param sigAlg name of the signature algorithm, e.g. "MD5WithRSA", |
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* "MD2WithRSA", "SHAwithDSA". If set to null, a default |
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* algorithm matching the private key will be chosen after |
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* the first keypair is generated. |
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* @exception NoSuchAlgorithmException on unrecognized algorithms. |
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*/ |
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public CertAndKeyGen (String keyType, String sigAlg) |
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throws NoSuchAlgorithmException |
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{ |
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keyGen = KeyPairGenerator.getInstance(keyType); |
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this.sigAlg = sigAlg; |
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} |
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/** |
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* Creates a CertAndKeyGen object for a particular key type, |
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* signature algorithm, and provider. |
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* |
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* @param keyType type of key, e.g. "RSA", "DSA" |
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* @param sigAlg name of the signature algorithm, e.g. "MD5WithRSA", |
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* "MD2WithRSA", "SHAwithDSA". If set to null, a default |
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* algorithm matching the private key will be chosen after |
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* the first keypair is generated. |
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* @param providerName name of the provider |
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* @exception NoSuchAlgorithmException on unrecognized algorithms. |
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* @exception NoSuchProviderException on unrecognized providers. |
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*/ |
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public CertAndKeyGen (String keyType, String sigAlg, String providerName) |
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throws NoSuchAlgorithmException, NoSuchProviderException |
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{ |
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if (providerName == null) { |
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keyGen = KeyPairGenerator.getInstance(keyType); |
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} else { |
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try { |
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keyGen = KeyPairGenerator.getInstance(keyType, providerName); |
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} catch (Exception e) { |
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// try first available provider instead |
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keyGen = KeyPairGenerator.getInstance(keyType); |
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} |
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} |
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this.sigAlg = sigAlg; |
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} |
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/** |
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* Sets the source of random numbers used when generating keys. |
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* If you do not provide one, a system default facility is used. |
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* You may wish to provide your own source of random numbers |
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* to get a reproducible sequence of keys and signatures, or |
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* because you may be able to take advantage of strong sources |
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* of randomness/entropy in your environment. |
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*/ |
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public void setRandom (SecureRandom generator) |
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{ |
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prng = generator; |
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} |
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// want "public void generate (X509Certificate)" ... inherit DSA/D-H param |
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/** |
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* Generates a random public/private key pair, with a given key |
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* size. Different algorithms provide different degrees of security |
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* for the same key size, because of the "work factor" involved in |
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* brute force attacks. As computers become faster, it becomes |
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* easier to perform such attacks. Small keys are to be avoided. |
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* |
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* <P>Note that not all values of "keyBits" are valid for all |
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* algorithms, and not all public key algorithms are currently |
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* supported for use in X.509 certificates. If the algorithm |
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* you specified does not produce X.509 compatible keys, an |
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* invalid key exception is thrown. |
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* |
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* @param keyBits the number of bits in the keys. |
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* @exception InvalidKeyException if the environment does not |
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* provide X.509 public keys for this signature algorithm. |
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*/ |
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public void generate (int keyBits) |
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throws InvalidKeyException |
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{ |
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KeyPair pair; |
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try { |
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if (prng == null) { |
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prng = new SecureRandom(); |
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} |
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keyGen.initialize(keyBits, prng); |
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pair = keyGen.generateKeyPair(); |
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} catch (Exception e) { |
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throw new IllegalArgumentException(e.getMessage()); |
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} |
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publicKey = pair.getPublic(); |
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privateKey = pair.getPrivate(); |
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// publicKey's format must be X.509 otherwise |
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// the whole CertGen part of this class is broken. |
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if (!"X.509".equalsIgnoreCase(publicKey.getFormat())) { |
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throw new IllegalArgumentException("Public key format is " |
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+ publicKey.getFormat() + ", must be X.509"); |
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} |
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if (sigAlg == null) { |
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sigAlg = AlgorithmId.getDefaultSigAlgForKey(privateKey); |
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if (sigAlg == null) { |
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throw new IllegalArgumentException( |
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"Cannot derive signature algorithm from " |
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+ privateKey.getAlgorithm()); |
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} |
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} |
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} |
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/** |
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* Returns the public key of the generated key pair if it is of type |
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* <code>X509Key</code>, or null if the public key is of a different type. |
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* |
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* XXX Note: This behaviour is needed for backwards compatibility. |
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* What this method really should return is the public key of the |
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* generated key pair, regardless of whether or not it is an instance of |
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* <code>X509Key</code>. Accordingly, the return type of this method |
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* should be <code>PublicKey</code>. |
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*/ |
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public X509Key getPublicKey() |
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{ |
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if (!(publicKey instanceof X509Key)) { |
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return null; |
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} |
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return (X509Key)publicKey; |
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} |
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/** |
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* Always returns the public key of the generated key pair. Used |
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* by KeyTool only. |
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* |
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* The publicKey is not necessarily to be an instance of |
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* X509Key in some JCA/JCE providers, for example SunPKCS11. |
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*/ |
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public PublicKey getPublicKeyAnyway() { |
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return publicKey; |
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} |
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208 |
/** |
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209 |
* Returns the private key of the generated key pair. |
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210 |
* |
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* <P><STRONG><em>Be extremely careful when handling private keys. |
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212 |
* When private keys are not kept secret, they lose their ability |
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213 |
* to securely authenticate specific entities ... that is a huge |
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214 |
* security risk!</em></STRONG> |
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215 |
*/ |
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216 |
public PrivateKey getPrivateKey () |
|
217 |
{ |
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218 |
return privateKey; |
|
219 |
} |
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220 |
||
221 |
/** |
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222 |
* Returns a self-signed X.509v3 certificate for the public key. |
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223 |
* The certificate is immediately valid. No extensions. |
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224 |
* |
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225 |
* <P>Such certificates normally are used to identify a "Certificate |
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226 |
* Authority" (CA). Accordingly, they will not always be accepted by |
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227 |
* other parties. However, such certificates are also useful when |
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228 |
* you are bootstrapping your security infrastructure, or deploying |
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229 |
* system prototypes. |
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230 |
* |
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231 |
* @param myname X.500 name of the subject (who is also the issuer) |
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232 |
* @param firstDate the issue time of the certificate |
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233 |
* @param validity how long the certificate should be valid, in seconds |
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234 |
* @exception CertificateException on certificate handling errors. |
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235 |
* @exception InvalidKeyException on key handling errors. |
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236 |
* @exception SignatureException on signature handling errors. |
|
237 |
* @exception NoSuchAlgorithmException on unrecognized algorithms. |
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238 |
* @exception NoSuchProviderException on unrecognized providers. |
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239 |
*/ |
|
240 |
public X509Certificate getSelfCertificate ( |
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241 |
X500Name myname, Date firstDate, long validity) |
|
242 |
throws CertificateException, InvalidKeyException, SignatureException, |
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243 |
NoSuchAlgorithmException, NoSuchProviderException |
|
244 |
{ |
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return getSelfCertificate(myname, firstDate, validity, null); |
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} |
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247 |
|
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// Like above, plus a CertificateExtensions argument, which can be null. |
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249 |
public X509Certificate getSelfCertificate (X500Name myname, Date firstDate, |
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long validity, CertificateExtensions ext) |
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251 |
throws CertificateException, InvalidKeyException, SignatureException, |
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NoSuchAlgorithmException, NoSuchProviderException |
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253 |
{ |
2 | 254 |
X509CertImpl cert; |
255 |
Date lastDate; |
|
256 |
||
257 |
try { |
|
258 |
lastDate = new Date (); |
|
259 |
lastDate.setTime (firstDate.getTime () + validity * 1000); |
|
260 |
||
261 |
CertificateValidity interval = |
|
262 |
new CertificateValidity(firstDate,lastDate); |
|
263 |
||
264 |
X509CertInfo info = new X509CertInfo(); |
|
265 |
// Add all mandatory attributes |
|
266 |
info.set(X509CertInfo.VERSION, |
|
267 |
new CertificateVersion(CertificateVersion.V3)); |
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info.set(X509CertInfo.SERIAL_NUMBER, new CertificateSerialNumber( |
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269 |
new java.util.Random().nextInt() & 0x7fffffff)); |
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AlgorithmId algID = AlgorithmId.get(sigAlg); |
2 | 271 |
info.set(X509CertInfo.ALGORITHM_ID, |
272 |
new CertificateAlgorithmId(algID)); |
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273 |
info.set(X509CertInfo.SUBJECT, myname); |
2 | 274 |
info.set(X509CertInfo.KEY, new CertificateX509Key(publicKey)); |
275 |
info.set(X509CertInfo.VALIDITY, interval); |
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info.set(X509CertInfo.ISSUER, myname); |
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277 |
if (ext != null) info.set(X509CertInfo.EXTENSIONS, ext); |
2 | 278 |
|
279 |
cert = new X509CertImpl(info); |
|
280 |
cert.sign(privateKey, this.sigAlg); |
|
281 |
||
282 |
return (X509Certificate)cert; |
|
283 |
||
284 |
} catch (IOException e) { |
|
285 |
throw new CertificateEncodingException("getSelfCert: " + |
|
286 |
e.getMessage()); |
|
287 |
} |
|
288 |
} |
|
289 |
||
290 |
// Keep the old method |
|
291 |
public X509Certificate getSelfCertificate (X500Name myname, long validity) |
|
292 |
throws CertificateException, InvalidKeyException, SignatureException, |
|
293 |
NoSuchAlgorithmException, NoSuchProviderException |
|
294 |
{ |
|
295 |
return getSelfCertificate(myname, new Date(), validity); |
|
296 |
} |
|
297 |
||
298 |
/** |
|
299 |
* Returns a PKCS #10 certificate request. The caller uses either |
|
300 |
* <code>PKCS10.print</code> or <code>PKCS10.toByteArray</code> |
|
301 |
* operations on the result, to get the request in an appropriate |
|
302 |
* transmission format. |
|
303 |
* |
|
304 |
* <P>PKCS #10 certificate requests are sent, along with some proof |
|
305 |
* of identity, to Certificate Authorities (CAs) which then issue |
|
306 |
* X.509 public key certificates. |
|
307 |
* |
|
308 |
* @param myname X.500 name of the subject |
|
309 |
* @exception InvalidKeyException on key handling errors. |
|
310 |
* @exception SignatureException on signature handling errors. |
|
311 |
*/ |
|
312 |
public PKCS10 getCertRequest (X500Name myname) |
|
313 |
throws InvalidKeyException, SignatureException |
|
314 |
{ |
|
315 |
PKCS10 req = new PKCS10 (publicKey); |
|
316 |
||
317 |
try { |
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318 |
Signature signature = Signature.getInstance(sigAlg); |
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319 |
signature.initSign (privateKey); |
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|
320 |
req.encodeAndSign(myname, signature); |
2 | 321 |
|
322 |
} catch (CertificateException e) { |
|
323 |
throw new SignatureException (sigAlg + " CertificateException"); |
|
324 |
||
325 |
} catch (IOException e) { |
|
326 |
throw new SignatureException (sigAlg + " IOException"); |
|
327 |
||
328 |
} catch (NoSuchAlgorithmException e) { |
|
329 |
// "can't happen" |
|
330 |
throw new SignatureException (sigAlg + " unavailable?"); |
|
331 |
} |
|
332 |
return req; |
|
333 |
} |
|
334 |
||
335 |
private SecureRandom prng; |
|
336 |
private String sigAlg; |
|
337 |
private KeyPairGenerator keyGen; |
|
338 |
private PublicKey publicKey; |
|
339 |
private PrivateKey privateKey; |
|
340 |
} |