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| 1 | /* | ||
| 2 | * Copyright (c) 1996, 2009, Oracle and/or its affiliates. All rights reserved. | ||
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | ||
| 4 | * | ||
| 5 | * This code is free software; you can redistribute it and/or modify it | ||
| 6 | * under the terms of the GNU General Public License version 2 only, as | ||
| 7 | * published by the Free Software Foundation. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle in the LICENSE file that accompanied this code. | ||
| 10 | * | ||
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT | ||
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | ||
| 14 | * version 2 for more details (a copy is included in the LICENSE file that | ||
| 15 | * accompanied this code). | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU General Public License version | ||
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, | ||
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | ||
| 20 | * | ||
| 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * questions. | ||
| 24 | */ | ||
| 25 | |||
| 26 | package sun.security.x509; | ||
| 27 | |||
| 28 | import java.io.IOException; | ||
| 29 | import java.security.cert.X509Certificate; | ||
| 30 | import java.security.cert.CertificateException; | ||
| 31 | import java.security.cert.CertificateEncodingException; | ||
| 32 | import java.security.*; | ||
| 33 | import java.util.Date; | ||
| 34 | |||
| 35 | import sun.security.pkcs.PKCS10; | ||
| 36 | |||
| 37 | |||
| 38 | /** | ||
| 39 | * Generate a pair of keys, and provide access to them. This class is | ||
| 40 | * provided primarily for ease of use. | ||
| 41 | * | ||
| 42 | * <P>This provides some simple certificate management functionality. | ||
| 43 | * Specifically, it allows you to create self-signed X.509 certificates | ||
| 44 | * as well as PKCS 10 based certificate signing requests. | ||
| 45 | * | ||
| 46 | * <P>Keys for some public key signature algorithms have algorithm | ||
| 47 | * parameters, such as DSS/DSA. Some sites' Certificate Authorities | ||
| 48 | * adopt fixed algorithm parameters, which speeds up some operations | ||
| 49 | * including key generation and signing. <em>At this time, this interface | ||
| 50 | * does not provide a way to provide such algorithm parameters, e.g. | ||
| 51 | * by providing the CA certificate which includes those parameters.</em> | ||
| 52 | * | ||
| 53 | * <P>Also, note that at this time only signature-capable keys may be | ||
| 54 | * acquired through this interface. Diffie-Hellman keys, used for secure | ||
| 55 | * key exchange, may be supported later. | ||
| 56 | * | ||
| 57 | * @author David Brownell | ||
| 58 | * @author Hemma Prafullchandra | ||
| 59 | * @see PKCS10 | ||
| 60 | * @see X509CertImpl | ||
| 61 | */ | ||
| 62 | public final class CertAndKeyGen { | ||
| 63 | /** | ||
| 64 | * Creates a CertAndKeyGen object for a particular key type | ||
| 65 | * and signature algorithm. | ||
| 66 | * | ||
| 67 | * @param keyType type of key, e.g. "RSA", "DSA" | ||
| 68 | * @param sigAlg name of the signature algorithm, e.g. "MD5WithRSA", | ||
| 69 | * "MD2WithRSA", "SHAwithDSA". | ||
| 70 | * @exception NoSuchAlgorithmException on unrecognized algorithms. | ||
| 71 | */ | ||
| 72 | public CertAndKeyGen (String keyType, String sigAlg) | ||
| 73 | throws NoSuchAlgorithmException | ||
| 74 | { | ||
| 75 | keyGen = KeyPairGenerator.getInstance(keyType); | ||
| 76 | this.sigAlg = sigAlg; | ||
| 77 | } | ||
| 78 | |||
| 79 | /** | ||
| 80 | * Creates a CertAndKeyGen object for a particular key type, | ||
| 81 | * signature algorithm, and provider. | ||
| 82 | * | ||
| 83 | * @param keyType type of key, e.g. "RSA", "DSA" | ||
| 84 | * @param sigAlg name of the signature algorithm, e.g. "MD5WithRSA", | ||
| 85 | * "MD2WithRSA", "SHAwithDSA". | ||
| 86 | * @param providerName name of the provider | ||
| 87 | * @exception NoSuchAlgorithmException on unrecognized algorithms. | ||
| 88 | * @exception NoSuchProviderException on unrecognized providers. | ||
| 89 | */ | ||
| 90 | public CertAndKeyGen (String keyType, String sigAlg, String providerName) | ||
| 91 | throws NoSuchAlgorithmException, NoSuchProviderException | ||
| 92 | { | ||
| 93 | if (providerName == null) { | ||
| 94 | keyGen = KeyPairGenerator.getInstance(keyType); | ||
| 95 | } else { | ||
| 96 | try { | ||
| 97 | keyGen = KeyPairGenerator.getInstance(keyType, providerName); | ||
| 98 | } catch (Exception e) { | ||
| 99 | // try first available provider instead | ||
| 100 | keyGen = KeyPairGenerator.getInstance(keyType); | ||
| 101 | } | ||
| 102 | } | ||
| 103 | this.sigAlg = sigAlg; | ||
| 104 | } | ||
| 105 | |||
| 106 | /** | ||
| 107 | * Sets the source of random numbers used when generating keys. | ||
| 108 | * If you do not provide one, a system default facility is used. | ||
| 109 | * You may wish to provide your own source of random numbers | ||
| 110 | * to get a reproducible sequence of keys and signatures, or | ||
| 111 | * because you may be able to take advantage of strong sources | ||
| 112 | * of randomness/entropy in your environment. | ||
| 113 | */ | ||
| 114 | public void setRandom (SecureRandom generator) | ||
| 115 | { | ||
| 116 | prng = generator; | ||
| 117 | } | ||
| 118 | |||
| 119 | // want "public void generate (X509Certificate)" ... inherit DSA/D-H param | ||
| 120 | |||
| 121 | /** | ||
| 122 | * Generates a random public/private key pair, with a given key | ||
| 123 | * size. Different algorithms provide different degrees of security | ||
| 124 | * for the same key size, because of the "work factor" involved in | ||
| 125 | * brute force attacks. As computers become faster, it becomes | ||
| 126 | * easier to perform such attacks. Small keys are to be avoided. | ||
| 127 | * | ||
| 128 | * <P>Note that not all values of "keyBits" are valid for all | ||
| 129 | * algorithms, and not all public key algorithms are currently | ||
| 130 | * supported for use in X.509 certificates. If the algorithm | ||
| 131 | * you specified does not produce X.509 compatible keys, an | ||
| 132 | * invalid key exception is thrown. | ||
| 133 | * | ||
| 134 | * @param keyBits the number of bits in the keys. | ||
| 135 | * @exception InvalidKeyException if the environment does not | ||
| 136 | * provide X.509 public keys for this signature algorithm. | ||
| 137 | */ | ||
| 138 | public void generate (int keyBits) | ||
| 139 | throws InvalidKeyException | ||
| 140 | { | ||
| 141 | KeyPair pair; | ||
| 142 | |||
| 143 | try { | ||
| 144 | if (prng == null) { | ||
| 145 | prng = new SecureRandom(); | ||
| 146 | } | ||
| 147 | keyGen.initialize(keyBits, prng); | ||
| 148 | pair = keyGen.generateKeyPair(); | ||
| 149 | |||
| 150 | } catch (Exception e) { | ||
| 151 | throw new IllegalArgumentException(e.getMessage()); | ||
| 152 | } | ||
| 153 | |||
| 154 | publicKey = pair.getPublic(); | ||
| 155 | privateKey = pair.getPrivate(); | ||
| 156 | } | ||
| 157 | |||
| 158 | |||
| 159 | /** | ||
| 160 | * Returns the public key of the generated key pair if it is of type | ||
| 161 | * <code>X509Key</code>, or null if the public key is of a different type. | ||
| 162 | * | ||
| 163 | * XXX Note: This behaviour is needed for backwards compatibility. | ||
| 164 | * What this method really should return is the public key of the | ||
| 165 | * generated key pair, regardless of whether or not it is an instance of | ||
| 166 | * <code>X509Key</code>. Accordingly, the return type of this method | ||
| 167 | * should be <code>PublicKey</code>. | ||
| 168 | */ | ||
| 169 | public X509Key getPublicKey() | ||
| 170 | { | ||
| 171 | if (!(publicKey instanceof X509Key)) { | ||
| 172 | return null; | ||
| 173 | } | ||
| 174 | return (X509Key)publicKey; | ||
| 175 | } | ||
| 176 | |||
| 177 | |||
| 178 | /** | ||
| 179 | * Returns the private key of the generated key pair. | ||
| 180 | * | ||
| 181 | * <P><STRONG><em>Be extremely careful when handling private keys. | ||
| 182 | * When private keys are not kept secret, they lose their ability | ||
| 183 | * to securely authenticate specific entities ... that is a huge | ||
| 184 | * security risk!</em></STRONG> | ||
| 185 | */ | ||
| 186 | public PrivateKey getPrivateKey () | ||
| 187 | { | ||
| 188 | return privateKey; | ||
| 189 | } | ||
| 190 | |||
| 191 | |||
| 192 | /** | ||
| 193 | * Returns a self-signed X.509v3 certificate for the public key. | ||
| 194 | * The certificate is immediately valid. No extensions. | ||
| 195 | * | ||
| 196 | * <P>Such certificates normally are used to identify a "Certificate | ||
| 197 | * Authority" (CA). Accordingly, they will not always be accepted by | ||
| 198 | * other parties. However, such certificates are also useful when | ||
| 199 | * you are bootstrapping your security infrastructure, or deploying | ||
| 200 | * system prototypes. | ||
| 201 | * | ||
| 202 | * @param myname X.500 name of the subject (who is also the issuer) | ||
| 203 | * @param firstDate the issue time of the certificate | ||
| 204 | * @param validity how long the certificate should be valid, in seconds | ||
| 205 | * @exception CertificateException on certificate handling errors. | ||
| 206 | * @exception InvalidKeyException on key handling errors. | ||
| 207 | * @exception SignatureException on signature handling errors. | ||
| 208 | * @exception NoSuchAlgorithmException on unrecognized algorithms. | ||
| 209 | * @exception NoSuchProviderException on unrecognized providers. | ||
| 210 | */ | ||
| 211 | public X509Certificate getSelfCertificate ( | ||
| 212 | X500Name myname, Date firstDate, long validity) | ||
| 213 | throws CertificateException, InvalidKeyException, SignatureException, | ||
| 214 | NoSuchAlgorithmException, NoSuchProviderException | ||
| 215 | { | ||
| 216 | X509CertImpl cert; | ||
| 217 | Date lastDate; | ||
| 218 | |||
| 219 | try { | ||
| 220 | lastDate = new Date (); | ||
| 221 | lastDate.setTime (firstDate.getTime () + validity * 1000); | ||
| 222 | |||
| 223 | CertificateValidity interval = | ||
| 224 | new CertificateValidity(firstDate,lastDate); | ||
| 225 | |||
| 226 | X509CertInfo info = new X509CertInfo(); | ||
| 227 | // Add all mandatory attributes | ||
| 228 | info.set(X509CertInfo.VERSION, | ||
| 229 | new CertificateVersion(CertificateVersion.V3)); | ||
| 230 | info.set(X509CertInfo.SERIAL_NUMBER, new CertificateSerialNumber( | ||
| 231 | new java.util.Random().nextInt() & 0x7fffffff)); | ||
| 232 | AlgorithmId algID = AlgorithmId.getAlgorithmId(sigAlg); | ||
| 233 | info.set(X509CertInfo.ALGORITHM_ID, | ||
| 234 | new CertificateAlgorithmId(algID)); | ||
| 235 | info.set(X509CertInfo.SUBJECT, new CertificateSubjectName(myname)); | ||
| 236 | info.set(X509CertInfo.KEY, new CertificateX509Key(publicKey)); | ||
| 237 | info.set(X509CertInfo.VALIDITY, interval); | ||
| 238 | info.set(X509CertInfo.ISSUER, new CertificateIssuerName(myname)); | ||
| 239 | |||
| 240 | cert = new X509CertImpl(info); | ||
| 241 | cert.sign(privateKey, this.sigAlg); | ||
| 242 | |||
| 243 | return (X509Certificate)cert; | ||
| 244 | |||
| 245 | } catch (IOException e) { | ||
| 246 | throw new CertificateEncodingException("getSelfCert: " + | ||
| 247 | e.getMessage()); | ||
| 248 | } | ||
| 249 | } | ||
| 250 | |||
| 251 | // Keep the old method | ||
| 252 | public X509Certificate getSelfCertificate (X500Name myname, long validity) | ||
| 253 | throws CertificateException, InvalidKeyException, SignatureException, | ||
| 254 | NoSuchAlgorithmException, NoSuchProviderException | ||
| 255 | { | ||
| 256 | return getSelfCertificate(myname, new Date(), validity); | ||
| 257 | } | ||
| 258 | |||
| 259 | /** | ||
| 260 | * Returns a PKCS #10 certificate request. The caller uses either | ||
| 261 | * <code>PKCS10.print</code> or <code>PKCS10.toByteArray</code> | ||
| 262 | * operations on the result, to get the request in an appropriate | ||
| 263 | * transmission format. | ||
| 264 | * | ||
| 265 | * <P>PKCS #10 certificate requests are sent, along with some proof | ||
| 266 | * of identity, to Certificate Authorities (CAs) which then issue | ||
| 267 | * X.509 public key certificates. | ||
| 268 | * | ||
| 269 | * @param myname X.500 name of the subject | ||
| 270 | * @exception InvalidKeyException on key handling errors. | ||
| 271 | * @exception SignatureException on signature handling errors. | ||
| 272 | */ | ||
| 273 | public PKCS10 getCertRequest (X500Name myname) | ||
| 274 | throws InvalidKeyException, SignatureException | ||
| 275 | { | ||
| 276 | PKCS10 req = new PKCS10 (publicKey); | ||
| 277 | |||
| 278 | try { | ||
| 279 | Signature signature = Signature.getInstance(sigAlg); | ||
| 280 | signature.initSign (privateKey); | ||
| 281 | req.encodeAndSign(myname, signature); | ||
| 282 | |||
| 283 | } catch (CertificateException e) { | ||
| 284 | throw new SignatureException (sigAlg + " CertificateException"); | ||
| 285 | |||
| 286 | } catch (IOException e) { | ||
| 287 | throw new SignatureException (sigAlg + " IOException"); | ||
| 288 | |||
| 289 | } catch (NoSuchAlgorithmException e) { | ||
| 290 | // "can't happen" | ||
| 291 | throw new SignatureException (sigAlg + " unavailable?"); | ||
| 292 | } | ||
| 293 | return req; | ||
| 294 | } | ||
| 295 | |||
| 296 | private SecureRandom prng; | ||
| 297 | private String sigAlg; | ||
| 298 | private KeyPairGenerator keyGen; | ||
| 299 | private PublicKey publicKey; | ||
| 300 | private PrivateKey privateKey; | ||
| 301 | } | ||