Coverage Summary for Class: JasyptPasswordEncryptor (com.acciente.oacc.encryptor.jasypt)

Class	Class, %	Method, %	Line, %
JasyptPasswordEncryptor	100% (1/ 1)	100% (6/ 6)	100% (24/ 24)
1 /*
2  * Copyright 2009-2017, Acciente LLC
3  *
4  * Acciente LLC licenses this file to you under the
5  * Apache License, Version 2.0 (the "License"); you
6  * may not use this file except in compliance with the
7  * License. You may obtain a copy of the License at
8  *
9  *     http://www.apache.org/licenses/LICENSE-2.0
10  *
11  * Unless required by applicable law or agreed to in
12  * writing, software distributed under the License is
13  * distributed on an "AS IS" BASIS, WITHOUT WARRANTIES
14  * OR CONDITIONS OF ANY KIND, either express or implied.
15  * See the License for the specific language governing
16  * permissions and limitations under the License.
17  */
18 package com.acciente.oacc.encryptor.jasypt;
19 
20 import com.acciente.oacc.encryptor.PasswordEncryptor;
21 import com.acciente.oacc.normalizer.TextNormalizer;
22 
23 import java.io.Serializable;
24 import java.nio.ByteBuffer;
25 import java.nio.CharBuffer;
26 import java.nio.charset.StandardCharsets;
27 import java.util.Arrays;
28 
29 /**
30  * Password encryptor implementation that uses the Jasypt digester for creating password hashes.
31  */
32 public final class JasyptPasswordEncryptor implements PasswordEncryptor, Serializable {
33    private static final long serialVersionUID = 1L;
34 
35    public static final String NAME = "jasypt";
36 
37    private static final StandardByteDigesterPool digesterPool           = new StandardByteDigesterPool();
38    private static final PasswordEncoderDecoder   passwordEncoderDecoder = new PasswordEncoderDecoder();
39 
40    private final String algorithm;
41    private final int    iterations;
42    private final int    saltSizeBytes;
43 
44    /**
45     * Creates a password encryptor that uses the Jasypt digester for password hashing with the specified values for
46     * algorithm, iterations and saltSizeBytes.
47     *
48     * @param algorithm     the name of the message digest algorithm to be used for password hashing.
49     *                      See the MessageDigest section in the <a href=
50     *                      "https://docs.oracle.com/javase/7/docs/technotes/guides/security/StandardNames.html#MessageDigest">
51     *                      Java Cryptography Architecture Standard Algorithm Name Documentation</a>
52     *                      for information about standard algorithm names.
53     * @param iterations    the number of times the password hash function will be applied recursively
54     * @param saltSizeBytes the size of the salt to be used, in bytes
55     * @return a {@link JasyptPasswordEncryptor} instance.
56     */
57    public static JasyptPasswordEncryptor newInstance(String algorithm,
58                                                      int iterations,
59                                                      int saltSizeBytes) {
60       return new JasyptPasswordEncryptor(algorithm, iterations, saltSizeBytes);
61    }
62 
63    private JasyptPasswordEncryptor(String algorithm, int iterations, int saltSizeBytes) {
64       this.algorithm = algorithm;
65       this.iterations = iterations;
66       this.saltSizeBytes = saltSizeBytes;
67    }
68 
69    @Override
70    public String encryptPassword(final char[] plainPassword) {
71       if (plainPassword == null) {
72          return null;
73       }
74 
75       final byte[] digest = digesterPool.getStandardByteDigester(algorithm, iterations, saltSizeBytes)
76             .digest(getCleanedBytes(plainPassword));
77 
78       return passwordEncoderDecoder.encode(algorithm, iterations, saltSizeBytes, digest);
79    }
80 
81    @Override
82    public boolean checkPassword(final char[] plainPassword,
83                                 final String storedPassword) {
84       if (plainPassword == null) {
85          return (storedPassword == null);
86       }
87       else if (storedPassword == null) {
88          return false;
89       }
90 
91       final DecodedPassword decodedPassword = passwordEncoderDecoder.decode(storedPassword);
92       return digesterPool.getStandardByteDigester(decodedPassword.getAlgorithm(),
93                                                   decodedPassword.getIterations(),
94                                                   decodedPassword.getSaltSizeBytes())
95             .matches(getCleanedBytes(plainPassword), decodedPassword.getDigest());
96    }
97 
98    private static byte[] getCleanedBytes(char[] password) {
99       final char[] normalizedChars = TextNormalizer.getInstance().normalizeToNfc(password);
100       final ByteBuffer byteBuffer = StandardCharsets.UTF_8.encode(CharBuffer.wrap(normalizedChars));
101       final byte[]     byteArray  = new byte[byteBuffer.remaining()];
102       byteBuffer.get(byteArray);
103       Arrays.fill(byteBuffer.array(), (byte) 0);
104       return byteArray;
105    }
106 }