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
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
|
/*
* Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
* @test
* @bug 8008296
* @summary Store and retrieve user passwords using PKCS#12 keystore
*/
import java.io.*;
import java.security.*;
import java.util.*;
import javax.crypto.*;
import javax.crypto.spec.*;
/*
* Store and retrieve passwords protected by a selection of PBE algorithms,
* using a PKCS#12 keystore.
*/
public class StorePasswords {
private static final String[] PBE_ALGORITHMS = new String[] {
"default PBE algorithm",
"PBEWithMD5AndDES",
"PBEWithSHA1AndDESede",
"PBEWithSHA1AndRC2_40",
"PBEWithSHA1AndRC2_128",
"PBEWithSHA1AndRC4_40",
"PBEWithSHA1AndRC4_128",
"PBEWithHmacSHA1AndAES_128",
"PBEWithHmacSHA224AndAES_128",
"PBEWithHmacSHA256AndAES_128",
"PBEWithHmacSHA384AndAES_128",
"PBEWithHmacSHA512AndAES_128",
"PBEWithHmacSHA1AndAES_256",
"PBEWithHmacSHA224AndAES_256",
"PBEWithHmacSHA256AndAES_256",
"PBEWithHmacSHA384AndAES_256",
"PBEWithHmacSHA512AndAES_256"
};
private static final String KEYSTORE = "mykeystore.p12";
private static final char[] KEYSTORE_PWD = "changeit".toCharArray();
private static final char[] ENTRY_PWD = "protectit".toCharArray();
private static final char[] USER_PWD = "hello1".toCharArray();
public static void main(String[] args) throws Exception {
new File(KEYSTORE).delete();
int storeCount = store();
int recoverCount = recover();
if (recoverCount != storeCount) {
throw new Exception("Stored " + storeCount + " user passwords, " +
"recovered " + recoverCount + " user passwords");
}
System.out.println("\nStored " + storeCount + " user passwords, " +
"recovered " + recoverCount + " user passwords");
new File(KEYSTORE).delete();
}
private static int store() throws Exception {
int count = 0;
// Load an empty PKCS#12 keystore
KeyStore keystore = KeyStore.getInstance("PKCS12");
System.out.println("\nLoading PKCS#12 keystore...");
keystore.load(null, null);
// Derive a PBE key from the password
PBEKeySpec keySpec = new PBEKeySpec(USER_PWD);
SecretKeyFactory factory = SecretKeyFactory.getInstance("PBE");
SecretKey key = factory.generateSecret(keySpec);
PBEParameterSpec specWithEightByteSalt =
new PBEParameterSpec("NaClNaCl".getBytes(), 1024);
// Store the user password in a keystore entry (for each algorithm)
for (String algorithm : PBE_ALGORITHMS) {
try {
System.out.println("Storing user password '" +
new String(USER_PWD) + "' (protected by " + algorithm +
")");
if (algorithm.equals("default PBE algorithm")) {
keystore.setKeyEntry(
"this entry is protected by " + algorithm, key,
ENTRY_PWD, null);
} else {
keystore.setEntry(
"this entry is protected by " + algorithm,
new KeyStore.SecretKeyEntry(key),
new KeyStore.PasswordProtection(ENTRY_PWD, algorithm,
null));
}
count++;
} catch (KeyStoreException e) {
Throwable inner = e.getCause();
if (inner instanceof UnrecoverableKeyException) {
Throwable inner2 = inner.getCause();
if (inner2 instanceof InvalidAlgorithmParameterException) {
System.out.println("...re-trying due to: " +
inner2.getMessage());
// Some PBE algorithms demand an 8-byte salt
keystore.setEntry(
"this entry is protected by " + algorithm,
new KeyStore.SecretKeyEntry(key),
new KeyStore.PasswordProtection(ENTRY_PWD,
algorithm, specWithEightByteSalt));
count++;
} else if (inner2 instanceof InvalidKeyException) {
System.out.println("...skipping due to: " +
inner2.getMessage());
// Unsupported crypto keysize
continue;
}
} else {
throw e;
}
}
}
// Store the PKCS#12 keystore
System.out.println("Storing PKCS#12 keystore to: " + KEYSTORE);
try (FileOutputStream out = new FileOutputStream(KEYSTORE)) {
keystore.store(out, KEYSTORE_PWD);
}
return count;
}
private static int recover() throws Exception {
int count = 0;
// Load the PKCS#12 keystore
KeyStore keystore = KeyStore.getInstance("PKCS12");
System.out.println("\nLoading PKCS#12 keystore from: " + KEYSTORE);
try (FileInputStream in = new FileInputStream(KEYSTORE)) {
keystore.load(in, KEYSTORE_PWD);
}
SecretKey key;
SecretKeyFactory factory;
PBEKeySpec keySpec;
// Retrieve each user password from the keystore
for (String algorithm : PBE_ALGORITHMS) {
key = (SecretKey) keystore.getKey("this entry is protected by " +
algorithm, ENTRY_PWD);
if (key != null) {
count++;
factory = SecretKeyFactory.getInstance(key.getAlgorithm());
keySpec =
(PBEKeySpec) factory.getKeySpec(key, PBEKeySpec.class);
char[] pwd = keySpec.getPassword();
System.out.println("Recovered user password '" +
new String(pwd) + "' (protected by " + algorithm + ")");
if (!Arrays.equals(USER_PWD, pwd)) {
throw new Exception("Failed to recover the user password " +
"protected by " + algorithm);
}
}
}
return count;
}
}
|
