LeineLab-Public/leinelab-key-app
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Refactor key generation and encoding stuff

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This commit is contained in:
lemoer 2025-06-20 11:03:59 +02:00
parent 4e8e5d5194
commit d4eb144b6c
1 changed files with 34 additions and 48 deletions
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82
lib/main.dart
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@ -15,6 +15,29 @@ void main() {
runApp(const MyApp());
}
Future<OpenSSHEd25519KeyPair> generateKeyPair() async {
final algorithm = Ed25519();
// Generate a key pair
final cryptographyKeyPair = await algorithm.newKeyPair();
final privateKey = await cryptographyKeyPair.extractPrivateKeyBytes();
final publicKey = (await cryptographyKeyPair.extractPublicKey()).bytes;
final dartsshKeyPair = OpenSSHEd25519KeyPair(
Uint8List.fromList(publicKey),
Uint8List.fromList(privateKey + publicKey),
"",
);
return dartsshKeyPair;
}
String encodePublicKey(OpenSSHEd25519KeyPair keyPair, {String comment = ''}) {
final publicKeyBytes = keyPair.toPublicKey().encode();
return "ssh-ed25519 ${base64.encode(publicKeyBytes)} $comment";
}
class MyApp extends StatelessWidget {
const MyApp({super.key});
@ -64,35 +87,10 @@ class MyHomePage extends StatefulWidget {
State<MyHomePage> createState() => _MyHomePageState();
}
String encodeOpenSshEd25519PublicKey(
Uint8List publicKeyBytes, {
String comment = '',
}) {
Uint8List encodeString(String str) {
final strBytes = utf8.encode(str);
final lenBytes = ByteData(4)..setUint32(0, strBytes.length);
return Uint8List.fromList(lenBytes.buffer.asUint8List() + strBytes);
}
Uint8List encodeBytes(Uint8List bytes) {
final lenBytes = ByteData(4)..setUint32(0, bytes.length);
return Uint8List.fromList(lenBytes.buffer.asUint8List() + bytes);
}
final type = 'ssh-ed25519';
final keyData = Uint8List.fromList(
encodeString(type) + encodeBytes(publicKeyBytes),
);
final keyBase64 = base64.encode(keyData);
return '$type $keyBase64${comment.isNotEmpty ? ' $comment' : ''}';
}
class _MyHomePageState extends State<MyHomePage> {
int _counter = 0;
int navIndex = 0;
List<int> privateKey = [];
List<int> publicKey = [];
OpenSSHEd25519KeyPair? keyPair;
String _output = '';
String key = '';
@ -109,16 +107,10 @@ class _MyHomePageState extends State<MyHomePage> {
if (navIndex == 0) {
SSHSocket? socket;
OpenSSHEd25519KeyPair? keypair;
try {
keypair = OpenSSHEd25519KeyPair(
Uint8List.fromList(publicKey),
Uint8List.fromList(privateKey + publicKey),
"",
);
print(keypair.toPem());
if (keyPair != null) {
print(keyPair!.toPem());
}
socket = await SSHSocket.connect(
'192.168.2.123',
@ -137,7 +129,7 @@ class _MyHomePageState extends State<MyHomePage> {
socket,
username: 'test',
//onPasswordRequest: () => '123456',
identities: List.of(keypair != null ? [keypair] : []),
identities: List.of(keyPair != null ? [keyPair!] : []),
);
final uptime = await client.run('uptime');
@ -153,16 +145,9 @@ class _MyHomePageState extends State<MyHomePage> {
print("foo");
} else {
final algorithm = Ed25519();
// Generate a key pair
final keyPair = await algorithm.newKeyPair();
privateKey = await keyPair.extractPrivateKeyBytes();
publicKey = (await keyPair.extractPublicKey())
.bytes; // Extract the public key bytes
final publicKeyStr = base64.encode(publicKey);
keyPair = await generateKeyPair();
setState(() {
// private to hex string
@ -170,10 +155,11 @@ class _MyHomePageState extends State<MyHomePage> {
// .map((byte) => byte.toRadixString(16).padLeft(2, '0'))
// .join('');
key = encodeOpenSshEd25519PublicKey(
Uint8List.fromList(publicKey),
comment: 'leinelab-app-key',
);
if (keyPair != null) {
key = encodePublicKey(keyPair!, comment: "leinelab-app-key");
} else {
key = "No key pair generated.";
}
});
await SystemChannels.platform.invokeMethod<void>(