forked from grpc/grpc-java
/
AdvancedTlsX509KeyManager.java
253 lines (226 loc) · 8.71 KB
/
AdvancedTlsX509KeyManager.java
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
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
/*
* Copyright 2021 The gRPC Authors
*
* Licensed 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 io.grpc.util;
import static com.google.common.base.Preconditions.checkNotNull;
import io.grpc.ExperimentalApi;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.net.Socket;
import java.security.GeneralSecurityException;
import java.security.Principal;
import java.security.PrivateKey;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import java.util.Arrays;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ScheduledFuture;
import java.util.concurrent.TimeUnit;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.net.ssl.SSLEngine;
import javax.net.ssl.X509ExtendedKeyManager;
/**
* AdvancedTlsX509KeyManager is an {@code X509ExtendedKeyManager} that allows users to configure
* advanced TLS features, such as private key and certificate chain reloading, etc.
*/
@ExperimentalApi("https://github.com/grpc/grpc-java/issues/8024")
public final class AdvancedTlsX509KeyManager extends X509ExtendedKeyManager {
private static final Logger log = Logger.getLogger(AdvancedTlsX509KeyManager.class.getName());
// The credential information sent to peers to prove our identity.
private volatile KeyInfo keyInfo;
/**
* Constructs an AdvancedTlsX509KeyManager.
*/
public AdvancedTlsX509KeyManager() throws CertificateException { }
@Override
public PrivateKey getPrivateKey(String alias) {
if (alias.equals("default")) {
return this.keyInfo.key;
}
return null;
}
@Override
public X509Certificate[] getCertificateChain(String alias) {
if (alias.equals("default")) {
return Arrays.copyOf(this.keyInfo.certs, this.keyInfo.certs.length);
}
return null;
}
@Override
public String[] getClientAliases(String keyType, Principal[] issuers) {
return new String[] {"default"};
}
@Override
public String chooseClientAlias(String[] keyType, Principal[] issuers, Socket socket) {
return "default";
}
@Override
public String chooseEngineClientAlias(String[] keyType, Principal[] issuers, SSLEngine engine) {
return "default";
}
@Override
public String[] getServerAliases(String keyType, Principal[] issuers) {
return new String[] {"default"};
}
@Override
public String chooseServerAlias(String keyType, Principal[] issuers, Socket socket) {
return "default";
}
@Override
public String chooseEngineServerAlias(String keyType, Principal[] issuers,
SSLEngine engine) {
return "default";
}
/**
* Updates the current cached private key and cert chains.
*
* @param key the private key that is going to be used
* @param certs the certificate chain that is going to be used
*/
public void updateIdentityCredentials(PrivateKey key, X509Certificate[] certs) {
// TODO(ZhenLian): explore possibilities to do a crypto check here.
this.keyInfo = new KeyInfo(checkNotNull(key, "key"), checkNotNull(certs, "certs"));
}
/**
* Schedules a {@code ScheduledExecutorService} to read private key and certificate chains from
* the local file paths periodically, and update the cached identity credentials if they are both
* updated.
*
* @param keyFile the file on disk holding the private key
* @param certFile the file on disk holding the certificate chain
* @param period the period between successive read-and-update executions
* @param unit the time unit of the initialDelay and period parameters
* @param executor the execute service we use to read and update the credentials
* @return an object that caller should close when the file refreshes are not needed
*/
public Closeable updateIdentityCredentialsFromFile(File keyFile, File certFile,
long period, TimeUnit unit, ScheduledExecutorService executor) throws IOException,
GeneralSecurityException {
UpdateResult newResult = readAndUpdate(keyFile, certFile, 0, 0);
if (!newResult.success) {
throw new GeneralSecurityException(
"Files were unmodified before their initial update. Probably a bug.");
}
final ScheduledFuture<?> future =
executor.scheduleWithFixedDelay(
new LoadFilePathExecution(keyFile, certFile), period, period, unit);
return new Closeable() {
@Override public void close() {
future.cancel(false);
}
};
}
/**
* Loads the private key and certificate chains from the local file paths. The contents are only
* read at the construction time and won't be updated afterwards.
*
* @param keyFile the file on disk holding the private key
* @param certFile the file on disk holding the certificate chain
*/
public void loadIdentityCredentialsFromFile(File keyFile, File certFile) throws IOException,
GeneralSecurityException {
UpdateResult newResult = readAndUpdate(keyFile, certFile, 0, 0);
if (!newResult.success) {
throw new GeneralSecurityException(
"Files were unmodified before their initial update. Probably a bug.");
}
}
private static class KeyInfo {
// The private key and the cert chain we will use to send to peers to prove our identity.
final PrivateKey key;
final X509Certificate[] certs;
public KeyInfo(PrivateKey key, X509Certificate[] certs) {
this.key = key;
this.certs = certs;
}
}
private class LoadFilePathExecution implements Runnable {
File keyFile;
File certFile;
long currentKeyTime;
long currentCertTime;
public LoadFilePathExecution(File keyFile, File certFile) {
this.keyFile = keyFile;
this.certFile = certFile;
this.currentKeyTime = 0;
this.currentCertTime = 0;
}
@Override
public void run() {
try {
UpdateResult newResult = readAndUpdate(this.keyFile, this.certFile, this.currentKeyTime,
this.currentCertTime);
if (newResult.success) {
this.currentKeyTime = newResult.keyTime;
this.currentCertTime = newResult.certTime;
}
} catch (IOException | GeneralSecurityException e) {
log.log(Level.SEVERE, "Failed refreshing private key and certificate chain from files. "
+ "Using previous ones", e);
}
}
}
private static class UpdateResult {
boolean success;
long keyTime;
long certTime;
public UpdateResult(boolean success, long keyTime, long certTime) {
this.success = success;
this.keyTime = keyTime;
this.certTime = certTime;
}
}
/**
* Reads the private key and certificates specified in the path locations. Updates {@code key} and
* {@code cert} if both of their modified time changed since last read.
*
* @param keyFile the file on disk holding the private key
* @param certFile the file on disk holding the certificate chain
* @param oldKeyTime the time when the private key file is modified during last execution
* @param oldCertTime the time when the certificate chain file is modified during last execution
* @return the result of this update execution
*/
private UpdateResult readAndUpdate(File keyFile, File certFile, long oldKeyTime, long oldCertTime)
throws IOException, GeneralSecurityException {
long newKeyTime = keyFile.lastModified();
long newCertTime = certFile.lastModified();
// We only update when both the key and the certs are updated.
if (newKeyTime != oldKeyTime && newCertTime != oldCertTime) {
FileInputStream keyInputStream = new FileInputStream(keyFile);
try {
PrivateKey key = CertificateUtils.getPrivateKey(keyInputStream);
FileInputStream certInputStream = new FileInputStream(certFile);
try {
X509Certificate[] certs = CertificateUtils.getX509Certificates(certInputStream);
updateIdentityCredentials(key, certs);
return new UpdateResult(true, newKeyTime, newCertTime);
} finally {
certInputStream.close();
}
} finally {
keyInputStream.close();
}
}
return new UpdateResult(false, oldKeyTime, oldCertTime);
}
/**
* Mainly used to avoid throwing IO Exceptions in java.io.Closeable.
*/
public interface Closeable extends java.io.Closeable {
@Override public void close();
}
}