File BcScryptKDF.java
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| BcScryptKDF | 38 | 12 | 0% | 6 | 0 |
Contributing tests
This file is covered by 6 tests.
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| 1 | /* | |
| 2 | * See the NOTICE file distributed with this work for additional | |
| 3 | * information regarding copyright ownership. | |
| 4 | * | |
| 5 | * This is free software; you can redistribute it and/or modify it | |
| 6 | * under the terms of the GNU Lesser General Public License as | |
| 7 | * published by the Free Software Foundation; either version 2.1 of | |
| 8 | * the License, or (at your option) any later version. | |
| 9 | * | |
| 10 | * This software is distributed in the hope that it will be useful, | |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 13 | * Lesser General Public License for more details. | |
| 14 | * | |
| 15 | * You should have received a copy of the GNU Lesser General Public | |
| 16 | * License along with this software; if not, write to the Free | |
| 17 | * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA | |
| 18 | * 02110-1301 USA, or see the FSF site: http://www.fsf.org. | |
| 19 | */ | |
| 20 | package org.xwiki.crypto.password.internal.kdf; | |
| 21 | ||
| 22 | import java.io.IOException; | |
| 23 | ||
| 24 | import org.bouncycastle.asn1.ASN1ObjectIdentifier; | |
| 25 | import org.bouncycastle.asn1.pkcs.KeyDerivationFunc; | |
| 26 | import org.bouncycastle.crypto.generators.SCrypt; | |
| 27 | import org.xwiki.crypto.params.cipher.symmetric.KeyParameter; | |
| 28 | import org.xwiki.crypto.params.cipher.symmetric.KeyWithIVParameters; | |
| 29 | import org.xwiki.crypto.password.params.KeyDerivationFunctionParameters; | |
| 30 | import org.xwiki.crypto.password.params.ScryptParameters; | |
| 31 | ||
| 32 | /** | |
| 33 | * Scrypt key derivation function based on Bouncy Castle. | |
| 34 | * | |
| 35 | * @version $Id: bb7f4bc643ee90a63430236241dcde1739f517e8 $ | |
| 36 | * @since 5.4M1 | |
| 37 | */ | |
| 38 | public class BcScryptKDF extends AbstractBcKDF | |
| 39 | { | |
| 40 | /** This OID, part of the GNU space, is not really reserved but suggested byt the IETF expired draft. */ | |
| 41 | private static final ASN1ObjectIdentifier ALG_ID = new ASN1ObjectIdentifier("1.3.6.1.4.1.11591.4.11"); | |
| 42 | ||
| 43 | protected final ScryptParameters parameters; | |
| 44 | ||
| 45 | /** | |
| 46 | * Construct a new SCrypt key derivation function. | |
| 47 | * | |
| 48 | * @param parameters the parameter for initializing the generator. | |
| 49 | */ | |
| 50 | 9 |  public BcScryptKDF(ScryptParameters parameters) |
| 51 | { | |
| 52 | 9 | this.parameters = parameters; |
| 53 | } | |
| 54 | ||
| 55 | /** | |
| 56 | * @return an ASN.1 representation of the key derivation function parameters. | |
| 57 | */ | |
| 58 | 5 | @Override |
| 59 | public KeyDerivationFunc getKeyDerivationFunction() | |
| 60 | { | |
| 61 | 5 | return new KeyDerivationFunc(ALG_ID, |
| 62 | new ScryptKDFParams(this.parameters.getSalt(), this.parameters.getCostParameter(), | |
| 63 | this.parameters.getBlockSize(), | |
| 64 | this.parameters.getParallelizationParameter(), this.parameters.getKeySize())); | |
| 65 | } | |
| 66 | ||
| 67 | 13 | @Override |
| 68 | public KeyDerivationFunctionParameters getParameters() | |
| 69 | { | |
| 70 | 13 | return this.parameters; |
| 71 | } | |
| 72 | ||
| 73 | 5 | @Override |
| 74 | public KeyParameter derive(byte[] password) | |
| 75 | { | |
| 76 | 5 | return new KeyParameter( |
| 77 | SCrypt.generate(password, this.parameters.getSalt(), this.parameters.getCostParameter(), | |
| 78 | this.parameters.getBlockSize(), this.parameters.getParallelizationParameter(), getKeySize())); | |
| 79 | } | |
| 80 | ||
| 81 | 4 | @Override |
| 82 | public KeyWithIVParameters derive(byte[] password, int ivSize) | |
| 83 | { | |
| 84 | 4 | int keySize = getKeySize(); |
| 85 | 4 | byte[] keyIV = SCrypt.generate(password, this.parameters.getSalt(), this.parameters.getCostParameter(), |
| 86 | this.parameters.getBlockSize(), this.parameters.getParallelizationParameter(), keySize + ivSize); | |
| 87 | ||
| 88 | 4 | byte[] key = new byte[keySize]; |
| 89 | 4 | System.arraycopy(keyIV, 0, key, 0, keySize); |
| 90 | ||
| 91 | 4 | byte[] iv = new byte[ivSize]; |
| 92 | 4 | System.arraycopy(keyIV, keySize, iv, 0, ivSize); |
| 93 | ||
| 94 | 4 | return new KeyWithIVParameters(key, iv); |
| 95 | } | |
| 96 | ||
| 97 | 2 | @Override |
| 98 | public byte[] getEncoded() throws IOException | |
| 99 | { | |
| 100 | 2 | return getKeyDerivationFunction().getEncoded(); |
| 101 | } | |
| 102 | } |