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authorAnton Tananaev <anton@traccar.org>2022-07-24 15:47:45 -0700
committerAnton Tananaev <anton@traccar.org>2022-07-24 15:47:45 -0700
commitbcd902eaf972ec4cd2befeec0ee0ab0940b7d711 (patch)
treef9877136c7d214f248419021f4c05b895eb55fd6 /src/main/java/org
parent2daec980de3183efbefc3e79a914a01dc6de910b (diff)
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Crypto signatures support
Diffstat (limited to 'src/main/java/org')
-rw-r--r--src/main/java/org/traccar/api/signature/CryptoManager.java98
-rw-r--r--src/main/java/org/traccar/api/signature/KeystoreModel.java44
2 files changed, 142 insertions, 0 deletions
diff --git a/src/main/java/org/traccar/api/signature/CryptoManager.java b/src/main/java/org/traccar/api/signature/CryptoManager.java
new file mode 100644
index 000000000..ea59dcd70
--- /dev/null
+++ b/src/main/java/org/traccar/api/signature/CryptoManager.java
@@ -0,0 +1,98 @@
+/*
+ * Copyright 2022 Anton Tananaev (anton@traccar.org)
+ *
+ * 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 org.traccar.api.signature;
+
+import org.traccar.helper.DataConverter;
+import org.traccar.storage.Storage;
+import org.traccar.storage.StorageException;
+import org.traccar.storage.query.Columns;
+import org.traccar.storage.query.Request;
+
+import javax.inject.Inject;
+import java.security.GeneralSecurityException;
+import java.security.KeyFactory;
+import java.security.KeyPair;
+import java.security.KeyPairGenerator;
+import java.security.PrivateKey;
+import java.security.PublicKey;
+import java.security.SecureRandom;
+import java.security.Signature;
+import java.security.spec.ECGenParameterSpec;
+import java.security.spec.PKCS8EncodedKeySpec;
+import java.security.spec.X509EncodedKeySpec;
+
+public class CryptoManager {
+
+ private final Storage storage;
+
+ private PublicKey publicKey;
+ private PrivateKey privateKey;
+
+ @Inject
+ public CryptoManager(Storage storage) {
+ this.storage = storage;
+ }
+
+ public String sign(String data) throws GeneralSecurityException, StorageException {
+ if (privateKey == null) {
+ initializeKeys();
+ }
+ Signature signature = Signature.getInstance("SHA256withECDSA");
+ signature.initSign(privateKey);
+ signature.update(data.getBytes());
+ return data + '.' + DataConverter.printBase64(signature.sign());
+ }
+
+ public String verify(String data) throws GeneralSecurityException, StorageException {
+ if (publicKey == null) {
+ initializeKeys();
+ }
+ Signature signature = Signature.getInstance("SHA256withECDSA");
+ signature.initVerify(publicKey);
+
+ int delimiter = data.lastIndexOf('.');
+ String originalData = data.substring(0, delimiter);
+
+ signature.update(originalData.getBytes());
+ if (!signature.verify(DataConverter.parseBase64(data.substring(delimiter + 1)))) {
+ throw new SecurityException("Invalid signature");
+ }
+ return originalData;
+ }
+
+ private void initializeKeys() throws StorageException, GeneralSecurityException {
+ KeystoreModel model = storage.getObject(KeystoreModel.class, new Request(new Columns.All()));
+ if (model != null) {
+ publicKey = KeyFactory.getInstance("EC")
+ .generatePublic(new X509EncodedKeySpec(model.getPublicKey()));
+ privateKey = KeyFactory.getInstance("EC")
+ .generatePrivate(new PKCS8EncodedKeySpec(model.getPrivateKey()));
+ } else {
+ KeyPairGenerator generator = KeyPairGenerator.getInstance("EC");
+ generator.initialize(new ECGenParameterSpec("secp256r1"), new SecureRandom());
+ KeyPair pair = generator.generateKeyPair();
+
+ publicKey = pair.getPublic();
+ privateKey = pair.getPrivate();
+
+ model = new KeystoreModel();
+ model.setPublicKey(publicKey.getEncoded());
+ model.setPrivateKey(privateKey.getEncoded());
+ storage.addObject(model, new Request(new Columns.Exclude("id")));
+ }
+ }
+
+}
diff --git a/src/main/java/org/traccar/api/signature/KeystoreModel.java b/src/main/java/org/traccar/api/signature/KeystoreModel.java
new file mode 100644
index 000000000..7f3140e81
--- /dev/null
+++ b/src/main/java/org/traccar/api/signature/KeystoreModel.java
@@ -0,0 +1,44 @@
+/*
+ * Copyright 2022 Anton Tananaev (anton@traccar.org)
+ *
+ * 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 org.traccar.api.signature;
+
+import org.traccar.model.BaseModel;
+import org.traccar.storage.StorageName;
+
+@StorageName("tc_keystore")
+public class KeystoreModel extends BaseModel {
+
+ private byte[] publicKey;
+
+ public byte[] getPublicKey() {
+ return publicKey;
+ }
+
+ public void setPublicKey(byte[] publicKey) {
+ this.publicKey = publicKey;
+ }
+
+ private byte[] privateKey;
+
+ public byte[] getPrivateKey() {
+ return privateKey;
+ }
+
+ public void setPrivateKey(byte[] privateKey) {
+ this.privateKey = privateKey;
+ }
+
+}