Merge the matrix-java-sdk due to it no longer maintained. Remove thirdparty repositories.

src/main/java/io/kamax/matrix/crypto/KeyManager.java

@@ -0,0 +1,100 @@
+/*
+ * matrix-java-sdk - Matrix Client SDK for Java
+ * Copyright (C) 2017 Kamax Sarl
+ *
+ * https://www.kamax.io/
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program 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 Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package io.kamax.matrix.crypto;
+
+import io.kamax.matrix.codec.MxBase64;
+
+import java.security.KeyPair;
+import java.util.ArrayList;
+import java.util.Base64;
+import java.util.List;
+
+
+import net.i2p.crypto.eddsa.EdDSAPrivateKey;
+import net.i2p.crypto.eddsa.EdDSAPublicKey;
+import net.i2p.crypto.eddsa.KeyPairGenerator;
+import net.i2p.crypto.eddsa.spec.EdDSANamedCurveTable;
+import net.i2p.crypto.eddsa.spec.EdDSAParameterSpec;
+import net.i2p.crypto.eddsa.spec.EdDSAPrivateKeySpec;
+import net.i2p.crypto.eddsa.spec.EdDSAPublicKeySpec;
+
+public class KeyManager {
+
+    public static KeyManager fromFile(String path) {
+        return new KeyManager(new KeyFileStore(path));
+    }
+
+    public static KeyManager fromMemory() {
+        return new KeyManager(new KeyMemoryStore());
+    }
+
+    private EdDSAParameterSpec keySpecs;
+    private List<KeyPair> keys;
+
+    public KeyManager(_KeyStore store) {
+        keySpecs = EdDSANamedCurveTable.getByName(EdDSANamedCurveTable.ED_25519);
+        keys = new ArrayList<>();
+
+        String seedBase64 = store.load().orElseGet(() -> {
+            KeyPair pair = (new KeyPairGenerator()).generateKeyPair();
+            String keyEncoded = getPrivateKeyBase64((EdDSAPrivateKey) pair.getPrivate());
+            store.store(keyEncoded);
+            return keyEncoded;
+        });
+        byte[] seed = Base64.getDecoder().decode(seedBase64);
+        EdDSAPrivateKeySpec privKeySpec = new EdDSAPrivateKeySpec(seed, keySpecs);
+        EdDSAPublicKeySpec pubKeySpec = new EdDSAPublicKeySpec(privKeySpec.getA(), keySpecs);
+        keys.add(new KeyPair(new EdDSAPublicKey(pubKeySpec), new EdDSAPrivateKey(privKeySpec)));
+    }
+
+    public int getCurrentIndex() {
+        return 0;
+    }
+
+    public KeyPair getKeys(int index) {
+        return keys.get(index);
+    }
+
+    public EdDSAPrivateKey getPrivateKey(int index) {
+        return (EdDSAPrivateKey) getKeys(index).getPrivate();
+    }
+
+    protected String getPrivateKeyBase64(EdDSAPrivateKey key) {
+        return MxBase64.encode(key.getSeed());
+    }
+
+    public String getPrivateKeyBase64(int index) {
+        return getPrivateKeyBase64(getPrivateKey(index));
+    }
+
+    public EdDSAPublicKey getPublicKey(int index) {
+        return (EdDSAPublicKey) getKeys(index).getPublic();
+    }
+
+    public EdDSAParameterSpec getSpecs() {
+        return keySpecs;
+    }
+
+    public String getPublicKeyBase64(int index) {
+        return MxBase64.encode(getPublicKey(index).getAbyte());
+    }
+
+}