Lazy XChaCha20-Poly1305 in Flutter base on cryptography
- Key exchange: X25519
- Encryption: XChaCha20
- Authentication: Poly1305
- pubspec.yml
dependencies:
lazyxchacha: ^1.0.0- Dart
final lazyxchacha = LazyXChaCha.instance- Generate KeyPair
final keyPair = await KeyPair.newKeyPair();- Key Exchange & Shared Key
final clientKeyPair = await KeyPair.newKeyPair();
final serverKeyPair = await KeyPair.newKeyPair();
final clientSharedKey = await clientKeyPair.sharedKey(serverKeyPair.pk);- Encrypt
final lazyXChaCha = LazyXChaCha.instance;
final sharedKey = await clientKeyPair.sharedKey(serverKeyPair.pk);
const plaintext = '{"message": "Hi"}';
final ciphertext = await lazyXChaCha.encrypt(plaintext, sharedKey);- Decrypt
final lazyXChaCha = LazyXChaCha.instance;
final sharedKey = await clientKeyPair.sharedKey(serverKeyPair.pk);
const ciphertext = '1ec54672d8ef2cca351';
final plaintext = await lazyXChaCha.decrypt(ciphertext, sharedKey);
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