81 lines
2.5 KiB
Java
81 lines
2.5 KiB
Java
/*
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* matrix-java-sdk - Matrix Client SDK for Java
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* Copyright (C) 2017 Kamax Sarl
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*
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* https://www.kamax.io/
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package io.kamax.matrix.crypto;
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import com.google.gson.JsonObject;
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import io.kamax.matrix.codec.MxBase64;
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import io.kamax.matrix.json.MatrixJson;
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import java.security.InvalidKeyException;
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import java.security.MessageDigest;
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import java.security.NoSuchAlgorithmException;
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import java.security.SignatureException;
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import net.i2p.crypto.eddsa.EdDSAEngine;
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public class SignatureManager {
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private KeyManager keyMgr;
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private String domain;
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private EdDSAEngine signEngine;
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public SignatureManager(KeyManager keyMgr, String domain) {
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this.keyMgr = keyMgr;
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this.domain = domain;
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try {
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signEngine = new EdDSAEngine(MessageDigest.getInstance(keyMgr.getSpecs().getHashAlgorithm()));
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signEngine.initSign(keyMgr.getPrivateKey(keyMgr.getCurrentIndex()));
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} catch (NoSuchAlgorithmException | InvalidKeyException e) {
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throw new RuntimeException(e);
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}
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}
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public String sign(JsonObject obj) {
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return sign(MatrixJson.encodeCanonical(obj));
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}
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public String sign(String message) {
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try {
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byte[] signRaw = signEngine.signOneShot(message.getBytes());
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return MxBase64.encode(signRaw);
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} catch (SignatureException e) {
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throw new RuntimeException(e);
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}
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}
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public JsonObject signMessageGson(String message) {
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String sign = sign(message);
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JsonObject keySignature = new JsonObject();
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// FIXME should create a signing key object what would give this ed and index values
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keySignature.addProperty("ed25519:" + keyMgr.getCurrentIndex(), sign);
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JsonObject signature = new JsonObject();
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signature.add(domain, keySignature);
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return signature;
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}
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}
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