author | mbalao |
Tue, 15 Jan 2019 19:24:07 -0300 | |
changeset 53340 | 142b179dd60e |
parent 47421 | f9e03aef3a49 |
child 53945 | 1f0b00fe27ed |
permissions | -rw-r--r-- |
2 | 1 |
/* |
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* Copyright (c) 2003, 2017, 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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||
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package sun.security.pkcs11; |
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import java.math.BigInteger; |
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import java.security.*; |
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import java.security.spec.*; |
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import javax.crypto.spec.DHParameterSpec; |
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import sun.security.provider.ParameterCache; |
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import static sun.security.util.SecurityProviderConstants.*; |
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import static sun.security.pkcs11.TemplateManager.*; |
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import sun.security.pkcs11.wrapper.*; |
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import static sun.security.pkcs11.wrapper.PKCS11Constants.*; |
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import sun.security.rsa.RSAKeyFactory; |
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/** |
46 |
* KeyPairGenerator implementation class. This class currently supports |
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* RSA, DSA, DH, and EC. |
|
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* |
|
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* Note that for DSA and DH we rely on the Sun and SunJCE providers to |
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* obtain the parameters from. |
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* |
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* @author Andreas Sterbenz |
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* @since 1.5 |
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*/ |
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final class P11KeyPairGenerator extends KeyPairGeneratorSpi { |
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||
57 |
// token instance |
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private final Token token; |
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||
60 |
// algorithm name |
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private final String algorithm; |
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||
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// mechanism id |
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private final long mechanism; |
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||
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// selected or default key size, always valid |
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private int keySize; |
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||
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// parameters specified via init, if any |
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private AlgorithmParameterSpec params; |
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||
72 |
// for RSA, selected or default value of public exponent, always valid |
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private BigInteger rsaPublicExponent = RSAKeyGenParameterSpec.F4; |
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// the supported keysize range of the native PKCS11 library |
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// if the value cannot be retrieved or unspecified, -1 is used. |
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private final int minKeySize; |
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private final int maxKeySize; |
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// SecureRandom instance, if specified in init |
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private SecureRandom random; |
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||
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P11KeyPairGenerator(Token token, String algorithm, long mechanism) |
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throws PKCS11Exception { |
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super(); |
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int minKeyLen = -1; |
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int maxKeyLen = -1; |
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try { |
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CK_MECHANISM_INFO mechInfo = token.getMechanismInfo(mechanism); |
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if (mechInfo != null) { |
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minKeyLen = (int) mechInfo.ulMinKeySize; |
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maxKeyLen = (int) mechInfo.ulMaxKeySize; |
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} |
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} catch (PKCS11Exception p11e) { |
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// Should never happen |
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throw new ProviderException |
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("Unexpected error while getting mechanism info", p11e); |
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} |
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// set default key sizes and apply our own algorithm-specific limits |
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// override lower limit to disallow unsecure keys being generated |
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// override upper limit to deter DOS attack |
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if (algorithm.equals("EC")) { |
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keySize = DEF_EC_KEY_SIZE; |
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if ((minKeyLen == -1) || (minKeyLen < 112)) { |
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minKeyLen = 112; |
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} |
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if ((maxKeyLen == -1) || (maxKeyLen > 2048)) { |
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maxKeyLen = 2048; |
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} |
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} else { |
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if (algorithm.equals("DSA")) { |
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keySize = DEF_DSA_KEY_SIZE; |
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} else if (algorithm.equals("RSA")) { |
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keySize = DEF_RSA_KEY_SIZE; |
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} else { |
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keySize = DEF_DH_KEY_SIZE; |
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} |
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if ((minKeyLen == -1) || (minKeyLen < 512)) { |
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minKeyLen = 512; |
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} |
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if (algorithm.equals("RSA")) { |
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if ((maxKeyLen == -1) || (maxKeyLen > 64 * 1024)) { |
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maxKeyLen = 64 * 1024; |
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} |
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} |
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} |
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|
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// auto-adjust default keysize in case it's out-of-range |
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if ((minKeyLen != -1) && (keySize < minKeyLen)) { |
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keySize = minKeyLen; |
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} |
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if ((maxKeyLen != -1) && (keySize > maxKeyLen)) { |
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keySize = maxKeyLen; |
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} |
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this.token = token; |
136 |
this.algorithm = algorithm; |
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this.mechanism = mechanism; |
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this.minKeySize = minKeyLen; |
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this.maxKeySize = maxKeyLen; |
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initialize(keySize, null); |
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} |
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143 |
// see JCA spec |
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@Override |
2 | 145 |
public void initialize(int keySize, SecureRandom random) { |
146 |
token.ensureValid(); |
|
147 |
try { |
|
2596 | 148 |
checkKeySize(keySize, null); |
2 | 149 |
} catch (InvalidAlgorithmParameterException e) { |
150 |
throw new InvalidParameterException(e.getMessage()); |
|
151 |
} |
|
152 |
this.params = null; |
|
153 |
if (algorithm.equals("EC")) { |
|
154 |
params = P11ECKeyFactory.getECParameterSpec(keySize); |
|
155 |
if (params == null) { |
|
2596 | 156 |
throw new InvalidParameterException( |
157 |
"No EC parameters available for key size " |
|
158 |
+ keySize + " bits"); |
|
2 | 159 |
} |
160 |
} |
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this.keySize = keySize; |
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this.random = random; |
2 | 163 |
} |
164 |
||
165 |
// see JCA spec |
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@Override |
2 | 167 |
public void initialize(AlgorithmParameterSpec params, SecureRandom random) |
168 |
throws InvalidAlgorithmParameterException { |
|
169 |
token.ensureValid(); |
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170 |
int tmpKeySize; |
2 | 171 |
if (algorithm.equals("DH")) { |
172 |
if (params instanceof DHParameterSpec == false) { |
|
173 |
throw new InvalidAlgorithmParameterException |
|
174 |
("DHParameterSpec required for Diffie-Hellman"); |
|
175 |
} |
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DHParameterSpec dhParams = (DHParameterSpec) params; |
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tmpKeySize = dhParams.getP().bitLength(); |
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checkKeySize(tmpKeySize, dhParams); |
2 | 179 |
// XXX sanity check params |
180 |
} else if (algorithm.equals("RSA")) { |
|
181 |
if (params instanceof RSAKeyGenParameterSpec == false) { |
|
182 |
throw new InvalidAlgorithmParameterException |
|
183 |
("RSAKeyGenParameterSpec required for RSA"); |
|
184 |
} |
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RSAKeyGenParameterSpec rsaParams = |
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(RSAKeyGenParameterSpec) params; |
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tmpKeySize = rsaParams.getKeysize(); |
2596 | 188 |
checkKeySize(tmpKeySize, rsaParams); |
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// override the supplied params to null |
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190 |
params = null; |
2 | 191 |
this.rsaPublicExponent = rsaParams.getPublicExponent(); |
192 |
// XXX sanity check params |
|
193 |
} else if (algorithm.equals("DSA")) { |
|
194 |
if (params instanceof DSAParameterSpec == false) { |
|
195 |
throw new InvalidAlgorithmParameterException |
|
196 |
("DSAParameterSpec required for DSA"); |
|
197 |
} |
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DSAParameterSpec dsaParams = (DSAParameterSpec) params; |
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tmpKeySize = dsaParams.getP().bitLength(); |
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checkKeySize(tmpKeySize, dsaParams); |
2 | 201 |
// XXX sanity check params |
202 |
} else if (algorithm.equals("EC")) { |
|
203 |
ECParameterSpec ecParams; |
|
204 |
if (params instanceof ECParameterSpec) { |
|
2596 | 205 |
ecParams = P11ECKeyFactory.getECParameterSpec( |
206 |
(ECParameterSpec)params); |
|
2 | 207 |
if (ecParams == null) { |
208 |
throw new InvalidAlgorithmParameterException |
|
209 |
("Unsupported curve: " + params); |
|
210 |
} |
|
211 |
} else if (params instanceof ECGenParameterSpec) { |
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String name = ((ECGenParameterSpec) params).getName(); |
2 | 213 |
ecParams = P11ECKeyFactory.getECParameterSpec(name); |
214 |
if (ecParams == null) { |
|
215 |
throw new InvalidAlgorithmParameterException |
|
216 |
("Unknown curve name: " + name); |
|
217 |
} |
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// override the supplied params with the derived one |
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219 |
params = ecParams; |
2 | 220 |
} else { |
221 |
throw new InvalidAlgorithmParameterException |
|
222 |
("ECParameterSpec or ECGenParameterSpec required for EC"); |
|
223 |
} |
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tmpKeySize = ecParams.getCurve().getField().getFieldSize(); |
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checkKeySize(tmpKeySize, ecParams); |
2 | 226 |
} else { |
227 |
throw new ProviderException("Unknown algorithm: " + algorithm); |
|
228 |
} |
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this.keySize = tmpKeySize; |
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230 |
this.params = params; |
2 | 231 |
this.random = random; |
232 |
} |
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233 |
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234 |
private void checkKeySize(int keySize, AlgorithmParameterSpec params) |
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throws InvalidAlgorithmParameterException { |
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236 |
// check native range first |
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237 |
if ((minKeySize != -1) && (keySize < minKeySize)) { |
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238 |
throw new InvalidAlgorithmParameterException(algorithm + |
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239 |
" key must be at least " + minKeySize + " bits. " + |
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240 |
"The specific key size " + keySize + " is not supported"); |
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241 |
} |
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242 |
if ((maxKeySize != -1) && (keySize > maxKeySize)) { |
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throw new InvalidAlgorithmParameterException(algorithm + |
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" key must be at most " + maxKeySize + " bits. " + |
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245 |
"The specific key size " + keySize + " is not supported"); |
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246 |
} |
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247 |
|
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248 |
// check our own algorithm-specific limits also |
2 | 249 |
if (algorithm.equals("EC")) { |
250 |
if (keySize < 112) { |
|
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251 |
throw new InvalidAlgorithmParameterException( |
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252 |
"EC key size must be at least 112 bit. " + |
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253 |
"The specific key size " + keySize + " is not supported"); |
2 | 254 |
} |
255 |
if (keySize > 2048) { |
|
256 |
// sanity check, nobody really wants keys this large |
|
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257 |
throw new InvalidAlgorithmParameterException( |
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258 |
"EC key size must be at most 2048 bit. " + |
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"The specific key size " + keySize + " is not supported"); |
2 | 260 |
} |
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261 |
} else { |
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262 |
// RSA, DH, DSA |
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263 |
if (keySize < 512) { |
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throw new InvalidAlgorithmParameterException(algorithm + |
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265 |
" key size must be at least 512 bit. " + |
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266 |
"The specific key size " + keySize + " is not supported"); |
2596 | 267 |
} |
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268 |
if (algorithm.equals("RSA")) { |
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269 |
BigInteger tmpExponent = rsaPublicExponent; |
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270 |
if (params != null) { |
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tmpExponent = |
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((RSAKeyGenParameterSpec)params).getPublicExponent(); |
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273 |
} |
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274 |
try { |
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// Reuse the checking in SunRsaSign provider. |
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276 |
// If maxKeySize is -1, then replace it with |
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277 |
// Integer.MAX_VALUE to indicate no limit. |
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278 |
RSAKeyFactory.checkKeyLengths(keySize, tmpExponent, |
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279 |
minKeySize, |
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(maxKeySize==-1? Integer.MAX_VALUE:maxKeySize)); |
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281 |
} catch (InvalidKeyException e) { |
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282 |
throw new InvalidAlgorithmParameterException(e); |
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283 |
} |
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284 |
} else if (algorithm.equals("DH")) { |
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285 |
if (params != null) { // initialized with specified parameters |
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286 |
// sanity check, nobody really wants keys this large |
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287 |
if (keySize > 64 * 1024) { |
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288 |
throw new InvalidAlgorithmParameterException( |
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289 |
"DH key size must be at most 65536 bit. " + |
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290 |
"The specific key size " + |
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291 |
keySize + " is not supported"); |
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|
292 |
} |
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293 |
} else { // default parameters will be used. |
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294 |
// Range is based on the values in |
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295 |
// sun.security.provider.ParameterCache class. |
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296 |
if ((keySize > 8192) || (keySize < 512) || |
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297 |
((keySize & 0x3f) != 0)) { |
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298 |
throw new InvalidAlgorithmParameterException( |
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|
299 |
"DH key size must be multiple of 64, and can " + |
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300 |
"only range from 512 to 8192 (inclusive). " + |
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|
301 |
"The specific key size " + |
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|
302 |
keySize + " is not supported"); |
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303 |
} |
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|
304 |
|
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305 |
DHParameterSpec cache = |
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306 |
ParameterCache.getCachedDHParameterSpec(keySize); |
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307 |
// Except 2048 and 3072, not yet support generation of |
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308 |
// parameters bigger than 1024 bits. |
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309 |
if ((cache == null) && (keySize > 1024)) { |
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310 |
throw new InvalidAlgorithmParameterException( |
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311 |
"Unsupported " + keySize + |
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|
312 |
"-bit DH parameter generation"); |
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|
313 |
} |
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|
314 |
} |
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|
315 |
} else { |
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|
316 |
// this restriction is in the spec for DSA |
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317 |
if ((keySize != 3072) && (keySize != 2048) && |
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318 |
((keySize > 1024) || ((keySize & 0x3f) != 0))) { |
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319 |
throw new InvalidAlgorithmParameterException( |
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|
320 |
"DSA key must be multiples of 64 if less than " + |
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|
321 |
"1024 bits, or 2048, 3072 bits. " + |
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|
322 |
"The specific key size " + |
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|
323 |
keySize + " is not supported"); |
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324 |
} |
2 | 325 |
} |
326 |
} |
|
327 |
} |
|
328 |
||
329 |
// see JCA spec |
|
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330 |
@Override |
2 | 331 |
public KeyPair generateKeyPair() { |
332 |
token.ensureValid(); |
|
333 |
CK_ATTRIBUTE[] publicKeyTemplate; |
|
334 |
CK_ATTRIBUTE[] privateKeyTemplate; |
|
335 |
long keyType; |
|
336 |
if (algorithm.equals("RSA")) { |
|
337 |
keyType = CKK_RSA; |
|
338 |
publicKeyTemplate = new CK_ATTRIBUTE[] { |
|
339 |
new CK_ATTRIBUTE(CKA_MODULUS_BITS, keySize), |
|
340 |
new CK_ATTRIBUTE(CKA_PUBLIC_EXPONENT, rsaPublicExponent), |
|
341 |
}; |
|
342 |
privateKeyTemplate = new CK_ATTRIBUTE[] { |
|
343 |
// empty |
|
344 |
}; |
|
345 |
} else if (algorithm.equals("DSA")) { |
|
346 |
keyType = CKK_DSA; |
|
347 |
DSAParameterSpec dsaParams; |
|
348 |
if (params == null) { |
|
349 |
try { |
|
350 |
dsaParams = ParameterCache.getDSAParameterSpec |
|
351 |
(keySize, random); |
|
352 |
} catch (GeneralSecurityException e) { |
|
353 |
throw new ProviderException |
|
354 |
("Could not generate DSA parameters", e); |
|
355 |
} |
|
356 |
} else { |
|
357 |
dsaParams = (DSAParameterSpec)params; |
|
358 |
} |
|
359 |
publicKeyTemplate = new CK_ATTRIBUTE[] { |
|
360 |
new CK_ATTRIBUTE(CKA_PRIME, dsaParams.getP()), |
|
361 |
new CK_ATTRIBUTE(CKA_SUBPRIME, dsaParams.getQ()), |
|
362 |
new CK_ATTRIBUTE(CKA_BASE, dsaParams.getG()), |
|
363 |
}; |
|
364 |
privateKeyTemplate = new CK_ATTRIBUTE[] { |
|
365 |
// empty |
|
366 |
}; |
|
367 |
} else if (algorithm.equals("DH")) { |
|
368 |
keyType = CKK_DH; |
|
369 |
DHParameterSpec dhParams; |
|
370 |
int privateBits; |
|
371 |
if (params == null) { |
|
372 |
try { |
|
373 |
dhParams = ParameterCache.getDHParameterSpec |
|
374 |
(keySize, random); |
|
375 |
} catch (GeneralSecurityException e) { |
|
376 |
throw new ProviderException |
|
377 |
("Could not generate DH parameters", e); |
|
378 |
} |
|
379 |
privateBits = 0; |
|
380 |
} else { |
|
381 |
dhParams = (DHParameterSpec)params; |
|
382 |
privateBits = dhParams.getL(); |
|
383 |
} |
|
384 |
if (privateBits <= 0) { |
|
385 |
// XXX find better defaults |
|
386 |
privateBits = (keySize >= 1024) ? 768 : 512; |
|
387 |
} |
|
388 |
publicKeyTemplate = new CK_ATTRIBUTE[] { |
|
389 |
new CK_ATTRIBUTE(CKA_PRIME, dhParams.getP()), |
|
390 |
new CK_ATTRIBUTE(CKA_BASE, dhParams.getG()) |
|
391 |
}; |
|
392 |
privateKeyTemplate = new CK_ATTRIBUTE[] { |
|
393 |
new CK_ATTRIBUTE(CKA_VALUE_BITS, privateBits), |
|
394 |
}; |
|
395 |
} else if (algorithm.equals("EC")) { |
|
396 |
keyType = CKK_EC; |
|
397 |
byte[] encodedParams = |
|
398 |
P11ECKeyFactory.encodeParameters((ECParameterSpec)params); |
|
399 |
publicKeyTemplate = new CK_ATTRIBUTE[] { |
|
400 |
new CK_ATTRIBUTE(CKA_EC_PARAMS, encodedParams), |
|
401 |
}; |
|
402 |
privateKeyTemplate = new CK_ATTRIBUTE[] { |
|
403 |
// empty |
|
404 |
}; |
|
405 |
} else { |
|
406 |
throw new ProviderException("Unknown algorithm: " + algorithm); |
|
407 |
} |
|
408 |
Session session = null; |
|
409 |
try { |
|
410 |
session = token.getObjSession(); |
|
411 |
publicKeyTemplate = token.getAttributes |
|
412 |
(O_GENERATE, CKO_PUBLIC_KEY, keyType, publicKeyTemplate); |
|
413 |
privateKeyTemplate = token.getAttributes |
|
414 |
(O_GENERATE, CKO_PRIVATE_KEY, keyType, privateKeyTemplate); |
|
415 |
long[] keyIDs = token.p11.C_GenerateKeyPair |
|
416 |
(session.id(), new CK_MECHANISM(mechanism), |
|
417 |
publicKeyTemplate, privateKeyTemplate); |
|
418 |
PublicKey publicKey = P11Key.publicKey |
|
419 |
(session, keyIDs[0], algorithm, keySize, publicKeyTemplate); |
|
420 |
PrivateKey privateKey = P11Key.privateKey |
|
421 |
(session, keyIDs[1], algorithm, keySize, privateKeyTemplate); |
|
422 |
return new KeyPair(publicKey, privateKey); |
|
423 |
} catch (PKCS11Exception e) { |
|
424 |
throw new ProviderException(e); |
|
425 |
} finally { |
|
426 |
token.releaseSession(session); |
|
427 |
} |
|
428 |
} |
|
429 |
} |