1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
|
/*
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*
*/
package org.apache.qpid.server.security.encryption;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.security.InvalidAlgorithmParameterException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
import javax.crypto.Cipher;
import javax.crypto.CipherInputStream;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.SecretKey;
import javax.crypto.spec.IvParameterSpec;
import javax.xml.bind.DatatypeConverter;
class AESKeyFileEncrypter implements ConfigurationSecretEncrypter
{
private static final String CIPHER_NAME = "AES/CBC/PKCS5Padding";
private static final int AES_INITIALIZATION_VECTOR_LENGTH = 16;
private static final String AES_ALGORITHM = "AES";
private final SecretKey _secretKey;
private final SecureRandom _random = new SecureRandom();
AESKeyFileEncrypter(SecretKey secretKey)
{
if(secretKey == null)
{
throw new NullPointerException("A non null secret key must be supplied");
}
if(!AES_ALGORITHM.equals(secretKey.getAlgorithm()))
{
throw new IllegalArgumentException("Provided secret key was for the algorithm: " + secretKey.getAlgorithm()
+ "when" + AES_ALGORITHM + "was needed.");
}
_secretKey = secretKey;
}
@Override
public String encrypt(final String unencrypted)
{
byte[] unencryptedBytes = unencrypted.getBytes(StandardCharsets.UTF_8);
try
{
byte[] ivbytes = new byte[AES_INITIALIZATION_VECTOR_LENGTH];
_random.nextBytes(ivbytes);
Cipher cipher = Cipher.getInstance(CIPHER_NAME);
cipher.init(Cipher.ENCRYPT_MODE, _secretKey, new IvParameterSpec(ivbytes));
byte[] encryptedBytes = readFromCipherStream(unencryptedBytes, cipher);
byte[] output = new byte[AES_INITIALIZATION_VECTOR_LENGTH + encryptedBytes.length];
System.arraycopy(ivbytes, 0, output, 0, AES_INITIALIZATION_VECTOR_LENGTH);
System.arraycopy(encryptedBytes, 0, output, AES_INITIALIZATION_VECTOR_LENGTH, encryptedBytes.length);
return DatatypeConverter.printBase64Binary(output);
}
catch (IOException | InvalidAlgorithmParameterException | InvalidKeyException | NoSuchAlgorithmException | NoSuchPaddingException e)
{
throw new IllegalArgumentException("Unable to encrypt secret", e);
}
}
@Override
public String decrypt(final String encrypted)
{
if(!isValidBase64(encrypted))
{
throw new IllegalArgumentException("Encrypted value is not valid Base 64 data: '" + encrypted + "'");
}
byte[] encryptedBytes = DatatypeConverter.parseBase64Binary(encrypted);
try
{
Cipher cipher = Cipher.getInstance(CIPHER_NAME);
IvParameterSpec ivParameterSpec = new IvParameterSpec(encryptedBytes, 0, AES_INITIALIZATION_VECTOR_LENGTH);
cipher.init(Cipher.DECRYPT_MODE, _secretKey, ivParameterSpec);
return new String(readFromCipherStream(encryptedBytes,
AES_INITIALIZATION_VECTOR_LENGTH,
encryptedBytes.length - AES_INITIALIZATION_VECTOR_LENGTH,
cipher), StandardCharsets.UTF_8);
}
catch (IOException | InvalidAlgorithmParameterException | InvalidKeyException | NoSuchAlgorithmException | NoSuchPaddingException e)
{
throw new IllegalArgumentException("Unable to encrypt secret", e);
}
}
private boolean isValidBase64(final String encrypted)
{
return encrypted.matches("^([\\w\\d+/]{4})*([\\w\\d+/]{2}==|[\\w\\d+/]{3}=)?$");
}
private byte[] readFromCipherStream(final byte[] unencryptedBytes, final Cipher cipher) throws IOException
{
return readFromCipherStream(unencryptedBytes, 0, unencryptedBytes.length, cipher);
}
private byte[] readFromCipherStream(final byte[] unencryptedBytes, int offset, int length, final Cipher cipher)
throws IOException
{
final byte[] encryptedBytes;
try (CipherInputStream cipherInputStream = new CipherInputStream(new ByteArrayInputStream(unencryptedBytes,
offset,
length), cipher))
{
byte[] buf = new byte[512];
int pos = 0;
int read;
while ((read = cipherInputStream.read(buf, pos, buf.length - pos)) != -1)
{
pos += read;
if (pos == buf.length)
{
byte[] tmp = buf;
buf = new byte[buf.length + 512];
System.arraycopy(tmp, 0, buf, 0, tmp.length);
}
}
encryptedBytes = new byte[pos];
System.arraycopy(buf, 0, encryptedBytes, 0, pos);
}
return encryptedBytes;
}
}
|
