jwt_manager 1.0.0

An easy-to-use pure dart JWT manager that creates JWT tokens, verifies a signature, expiration time and others required key fields.

example/main.dart

import 'package:jwt_manager/jwt_manager.dart';

void main() {
  // Creating a token
  final tokenDto = FcmTokenDto(
    iss: '[e-mail]',
    iat: DateTime(2001),
  );

  final pemPrivateKey = '''
-----BEGIN PRIVATE KEY-----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-----END PRIVATE KEY-----
''';
  final pemPublicKey = '''
-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAu1SU1LfVLPHCozMxH2Mo
4lgOEePzNm0tRgeLezV6ffAt0gunVTLw7onLRnrq0/IzW7yWR7QkrmBL7jTKEn5u
+qKhbwKfBstIs+bMY2Zkp18gnTxKLxoS2tFczGkPLPgizskuemMghRniWaoLcyeh
kd3qqGElvW/VDL5AaWTg0nLVkjRo9z+40RQzuVaE8AkAFmxZzow3x+VJYKdjykkJ
0iT9wCS0DRTXu269V264Vf/3jvredZiKRkgwlL9xNAwxXFg0x/XFw005UWVRIkdg
cKWTjpBP2dPwVZ4WWC+9aGVd+Gyn1o0CLelf4rEjGoXbAAEgAqeGUxrcIlbjXfbc
mwIDAQAB
-----END PUBLIC KEY-----
''';

  // Creating an encoded and signed token

  // RsaKeyParser extracts private key from a pem string
  final parser = RsaKeyParser();
  final rsaPrivateKey = parser.extractPrivateKey(pemPrivateKey);

  // Create RsaSignifier for signing
  final rsaSignifier = RsaSignifier(privateKey: rsaPrivateKey);

  // JwtBuilder encodes the token to string and signs it
  final jwtBuilder = JwtBuilder(signifier: rsaSignifier);
  final jwtToken = jwtBuilder.buildToken(tokenDto);

  print('Encoded JWT: $jwtToken');

  // Checking the signature with the public key

  // Extract public key from a pem string
  final rsaPublicKey = parser.extractPublicKey(pemPublicKey);

  // Verifying the signature
  final rsaVerifier = RsaSignatureVerifier(publicKey: rsaPublicKey);
  final isVerified = rsaVerifier.verify(
      'eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJzb21lQGVtYWlsLmNvbSIsInNjb3BlIjoiaHR0cHM6Ly93d3cuZ29vZ2xlYXBpcy5jb20vYXV0aC9maXJlYmFzZS5tZXNzYWdpbmciLCJhdWQiOiJodHRwczovL29hdXRoMi5nb29nbGVhcGlzLmNvbS90b2tlbiIsImV4cCI6OTc4Mjk2NDAwLCJpYXQiOjk3ODI5MjgwMH0',
      'cqABcd-RMTQvxvI2zKPNek-UPd7fY0796B8hN9pDYyyrRWDOy7LlufaCvMlDIXrOS-zJMTsFbPQ8UMYY2Ofkz_lloCy4K5IhGZQIOjYvfhIZhp9PxMvj0XhRsezERQoK4air_lcUEh1LJ1o9j_i4P0XyOqGhcgcKKZLrc3zziSbb-vEIKu9gX4WsVYpyv4CK-o9AOAxXqukebcrIdURhf0V8o1hiVwTTfX5_x4j_XF99ZqjoFCTTcieM2F7F9-LFmwqy9Cg0E_UsyPC7aeR_UADLfE-1SBfYTSPdxAZ0HVfYQcET7hnzZJzz_NhyD62fLQzj6Eqag8_fWeZr_NYsPg');

  print('Is signature verified: $isVerified');
}