js: implement import/delete Key, some fixes

--

* Keyring.js
   - implemented importKey: importing one or more armored public key
     blocks.
   - implemented deleteKey: deleting a public Key from gpg.

* Key.js renamed property Key.armor to Key.armored

* Helpers.js: toKeyIDArray does not complain anymore if there are no
  keys. Not having Keys in e.g. signing keys in encrypt is legitimate
  and common, the complaints were getting spammy

* Errors.js: gpgme_errors now always pass an optional additional
  message, for easier debugging in minified code

* Connection.js: Fix in gpgme-json responses containing objects

* eslintrc.json: Start using eslint. A cleanup to conform to it is not
  done yet

* Added further tests for the new functionality

1 files changed, 83 insertions, 0 deletions

diff --git a/lang/js/BrowserTestExtension/tests/KeyImportExport.js b/lang/js/BrowserTestExtension/tests/KeyImportExport.js
new file mode 100644
index 00000000..e6eb5a30
--- /dev/null
+++ b/lang/js/BrowserTestExtension/tests/KeyImportExport.js
@@ -0,0 +1,83 @@
+/* gpgme.js - Javascript integration for gpgme
+ * Copyright (C) 2018 Bundesamt für Sicherheit in der Informationstechnik
+ *
+ * This file is part of GPGME.
+ *
+ * GPGME is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as
+ * published by the Free Software Foundation; either version 2.1 of
+ * the License, or (at your option) any later version.
+ *
+ * GPGME 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this program; if not, see <http://www.gnu.org/licenses/>.
+ * SPDX-License-Identifier: LGPL-2.1+
+ */
+
+/* global describe, it, expect, Gpgmejs, ImportablePublicKey */
+
+describe('Key importing', function () {
+    it('Prepare test Key (deleting it from gnupg, if present)', function(done){
+        let prm = Gpgmejs.init();
+        prm.then(function (context) {
+            expect(context.Keyring.getKeys).to.be.a('function');
+            context.Keyring.getKeys(ImportablePublicKey.fingerprint).then(
+                function(result){
+                    if (result.length === 1) {
+                        result[0].delete().then(function(result){
+                            expect(result).to.be.true;
+                            done();
+                        });
+                    } else {
+                        done();
+                    }
+                });
+        });
+    });
+
+    it('importing, updating, then deleting public Key', function (done) {
+        //This test runs in one large step, to ensure the proper state of the
+        // key in all stages.
+        let prm = Gpgmejs.init();
+        prm.then(function (context) {
+            context.Keyring.getKeys(ImportablePublicKey.fingerprint).then(
+                function(result){
+                    expect(result).to.be.an('array');
+                    expect(result.length).to.equal(0);
+                    context.Keyring.importKey(ImportablePublicKey.key, true)
+                        .then(function(result){
+                            expect(result[0]).to.not.be.undefined;
+                            expect(result[0].key).to.be.an('object');
+                            expect(result[0].key.fingerprint).to.equal(
+                                ImportablePublicKey.fingerprint);
+                            expect(result[0].status).to.equal('newkey');
+                            context.Keyring.importKey(
+                                ImportablePublicKey.keyChangedUserId,true)
+                                .then(function(res){
+                                    expect(res[0]).to.not.be.undefined;
+                                    expect(res[0].key).to.be.an('object');
+                                    expect(res[0].key.fingerprint).to.equal(
+                                        ImportablePublicKey.fingerprint);
+                                    expect(res[0].status).to.equal(
+                                        'change');
+                                    expect(
+                                        res[0].changes.userId).to.be.true;
+                                    expect(
+                                        res[0].changes.subkey).to.be.false;
+                                    expect(
+                                        res[0].changes.signature).to.be.true;
+                                    res[0].key.delete().then(function(result){
+                                        expect(result).to.be.true;
+                                        done();
+                                    });
+                                });
+                        });
+                });
+        });
+    });
+
+});
\ No newline at end of file