First implementation

src/main/groovy/io/kamax/mxisd/signature/SignatureManager.groovy

@@ -0,0 +1,59 @@
+/*
+ * mxisd - Matrix Identity Server Daemon
+ * Copyright (C) 2017 Maxime Dor
+ *
+ * https://max.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.mxisd.signature
+
+import io.kamax.mxisd.config.ServerConfig
+import io.kamax.mxisd.key.KeyManager
+import net.i2p.crypto.eddsa.EdDSAEngine
+import org.springframework.beans.factory.InitializingBean
+import org.springframework.beans.factory.annotation.Autowired
+import org.springframework.stereotype.Component
+
+import java.security.MessageDigest
+
+@Component
+class SignatureManager implements InitializingBean {
+
+    @Autowired
+    private KeyManager keyMgr
+
+    @Autowired
+    private ServerConfig srvCfg
+
+    private EdDSAEngine signEngine
+
+    Map<?, ?> signMessage(String message) {
+        byte[] signRaw = signEngine.signOneShot(message.getBytes())
+        String sign = Base64.getEncoder().encodeToString(signRaw)
+        return [
+                "${srvCfg.getName()}": [
+                        "ed25519:${keyMgr.getCurrentIndex()}": sign
+                ]
+        ]
+    }
+
+    @Override
+    void afterPropertiesSet() throws Exception {
+        signEngine = new EdDSAEngine(MessageDigest.getInstance(keyMgr.getSpecs().getHashAlgorithm()))
+        signEngine.initSign(keyMgr.getPrivateKey(keyMgr.getCurrentIndex()))
+    }
+
+}