From 1e57a816e7a3bff96b220a59d65122131a8d6a2d Mon Sep 17 00:00:00 2001
From: Vishesh Handa <me@vhanda.in>
Date: Mon, 21 Dec 2020 21:53:03 +0100
Subject: [PATCH] keygen experiment: Try to generate an ed25519 key

---
 lib/ssh/main_keygen.dart | 39 ++++++++++++++++++++++++++++++++++-----
 pubspec.lock             | 21 +++++++++++++++++++++
 pubspec.yaml             |  2 ++
 3 files changed, 57 insertions(+), 5 deletions(-)

diff --git a/lib/ssh/main_keygen.dart b/lib/ssh/main_keygen.dart
index f6f3c300..4883df16 100644
--- a/lib/ssh/main_keygen.dart
+++ b/lib/ssh/main_keygen.dart
@@ -1,12 +1,21 @@
+import 'dart:convert';
 import 'dart:io';
 
-import 'package:gitjournal/ssh/rsa_key_pair.dart';
+import 'package:cryptography/cryptography.dart';
 
-void main() {
+import './binary_length_value.dart';
+
+void main() async {
   print("Generating new random key");
-  var keyPair = RsaKeyPair.generate();
-  var publicKeyStr = keyPair.publicKeyString(comment: "No Comment");
-  var privateKeyStr = keyPair.privateKeyString();
+  final keyPair = await ed25519.newKeyPair();
+
+  var publicKey = keyPair.publicKey;
+  var privateKey = keyPair.privateKey;
+
+  var publicKeyStr = publicKeyString(publicKey.bytes);
+  var privateKeyStr = ""; //keyPair.privateKeyString();
+
+  print(privateKey);
 
   var keyName = "key_";
   var num = 0;
@@ -20,3 +29,23 @@ void main() {
   File("key_$num.pub").writeAsStringSync(publicKeyStr + '\n');
   File("key_$num").writeAsStringSync(privateKeyStr + '\n');
 }
+
+String publicKeyString(List<int> publicKeyBytes, {String comment = ""}) {
+  var data = BinaryLengthValue.encode([
+    BinaryLengthValue.fromString("ssh-ed25519"),
+    BinaryLengthValue(publicKeyBytes),
+  ]);
+
+  if (comment.isNotEmpty) {
+    comment = comment.replaceAll('\r', ' ');
+    comment = comment.replaceAll('\n', ' ');
+    comment = ' $comment';
+  }
+
+  return 'ssh-ed25519 ${base64.encode(data)}$comment';
+}
+
+String privateKeyString() {
+  var str = '-----BEGIN OPENSSH PRIVATE KEY-----\n';
+  return str;
+}
diff --git a/pubspec.lock b/pubspec.lock
index 434d621d..f344f3a2 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -162,6 +162,20 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "2.1.5"
+  cryptography:
+    dependency: "direct main"
+    description:
+      name: cryptography
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.4.1"
+  cryptography_flutter:
+    dependency: "direct main"
+    description:
+      name: cryptography_flutter
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.0"
   crypton:
     dependency: "direct main"
     description:
@@ -339,6 +353,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "0.2.1"
+  fixnum:
+    dependency: transitive
+    description:
+      name: fixnum
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.10.11"
   flutter:
     dependency: "direct main"
     description: flutter
diff --git a/pubspec.yaml b/pubspec.yaml
index f8405045..63d25459 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -22,6 +22,8 @@ dependencies:
   badges: ^1.1.1
   connectivity: ^0.4.6+1
   cached_network_image: ^2.2.0+1
+  cryptography: ^1.4.1
+  cryptography_flutter: ^1.0.0
   crypton: ^1.1.3
   device_info: ">=0.4.2+4 <2.0.0"
   dots_indicator: ^0.0.3