Dart Requires Chilkat v11.0.0+

How to Load a JWK Set Published at a Remote URL

See more JSON Web Signatures (JWS) Examples

Demonstrates how to load a JWK set published at a remote URL. In general, this example can fetch any JSON, or any text (non-binary) document from a remote URL. It uses the Chilkat HTTP API to do it. Dart

import 'package:chilkat/chilkat.dart';

void main() {
  // This example assumes the Chilkat HTTP API to have been previously unlocked.
  // See Global Unlock Sample for sample code.

  final http = CkHttp();

  // I put a sample JWK set at this URL: https://www.chilkatsoft.com/data/jwk-set.json
  // You can test this example with it.
  final sbJwkSet = CkStringBuilder();
  try {
    http.quickGetSb('https://www.chilkatsoft.com/data/jwk-set.json', sbJwkSet);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // Load the JWK into a JSON object..
  final jwkSet = CkJsonObject();
  jwkSet.loadSb(sbJwkSet);
  jwkSet.emitCompact = false;
  print('The full JWK Key Set:');
  print(jwkSet.emit());

  // Iterate over each key...
  final jwk = CkJsonObject();
  final numKeys = jwkSet.sizeOfArray('keys');
  var i = 0;
  while (i < numKeys) {
    jwkSet.i = i;
    print('---- JWK $i ----');

    jwkSet.objectOf2('keys[i]', jwk);

    jwk.emitCompact = false;
    print(jwk.emit());
    i++;
  }

  // Output:

  // The full JWK Key Set:
  // { 
  //   "keys": [
  //     { 
  //       "kty": "EC",
  //       "crv": "P-256",
  //       "x": "MKBCTNIcKUSDii11ySs3526iDZ8AiTo7Tu6KPAqv7D4",
  //       "y": "4Etl6SRW2YiLUrN5vfvVHuhp7x8PxltmWWlbbM4IFyM",
  //       "d": "870MB6gfuTJ4HtUnUvYMyJpr5eUZNP4Bk43bVdj3eAE",
  //       "use": "enc",
  //       "kid": "1"
  //     },
  //     { 
  //       "kty": "RSA",
  //       "n": "0vx7agoebGcQSuuPiLJXZptN9nndrQmbXEps2aiAFbWhM78LhWx4
  // cbbfAAtVT86zwu1RK7aPFFxuhDR1L6tSoc_BJECPebWKRXjBZCiFV4n3oknjhMst
  // n64tZ_2W-5JsGY4Hc5n9yBXArwl93lqt7_RN5w6Cf0h4QyQ5v-65YGjQR0_FDW2Q
  // vzqY368QQMicAtaSqzs8KJZgnYb9c7d0zgdAZHzu6qMQvRL5hajrn1n91CbOpbIS
  // D08qNLyrdkt-bFTWhAI4vMQFh6WeZu0fM4lFd2NcRwr3XPksINHaQ-G_xBniIqbw
  // 0Ls1jF44-csFCur-kEgU8awapJzKnqDKgw",
  //       "e": "AQAB",
  //       "d": "X4cTteJY_gn4FYPsXB8rdXix5vwsg1FLN5E3EaG6RJoVH-HLLKD9
  // M7dx5oo7GURknchnrRweUkC7hT5fJLM0WbFAKNLWY2vv7B6NqXSzUvxT0_YSfqij
  // wp3RTzlBaCxWp4doFk5N2o8Gy_nHNKroADIkJ46pRUohsXywbReAdYaMwFs9tv8d
  // _cPVY3i07a3t8MN6TNwm0dSawm9v47UiCl3Sk5ZiG7xojPLu4sbg1U2jx4IBTNBz
  // nbJSzFHK66jT8bgkuqsk0GjskDJk19Z4qwjwbsnn4j2WBii3RL-Us2lGVkY8fkFz
  // me1z0HbIkfz0Y6mqnOYtqc0X4jfcKoAC8Q",
  //       "p": "83i-7IvMGXoMXCskv73TKr8637FiO7Z27zv8oj6pbWUQyLPQBQxtPV
  // nwD20R-60eTDmD2ujnMt5PoqMrm8RfmNhVWDtjjMmCMjOpSXicFHj7XOuVIYQyqV
  // WlWEh6dN36GVZYk93N8Bc9vY41xy8B9RzzOGVQzXvNEvn7O0nVbfs",
  //       "q": "3dfOR9cuYq-0S-mkFLzgItgMEfFzB2q3hWehMuG0oCuqnb3vobLyum
  // qjVZQO1dIrdwgTnCdpYzBcOfW5r370AFXjiWft_NGEiovonizhKpo9VVS78TzFgx
  // kIdrecRezsZ-1kYd_s1qDbxtkDEgfAITAG9LUnADun4vIcb6yelxk",
  //       "dp": "G4sPXkc6Ya9y8oJW9_ILj4xuppu0lzi_H7VTkS8xj5SdX3coE0oim
  // YwxIi2emTAue0UOa5dpgFGyBJ4c8tQ2VF402XRugKDTP8akYhFo5tAA77Qe_Nmtu
  // YZc3C3m3I24G2GvR5sSDxUyAN2zq8Lfn9EUms6rY3Ob8YeiKkTiBj0",
  //       "dq": "s9lAH9fggBsoFR8Oac2R_E2gw282rT2kGOAhvIllETE1efrA6huUU
  // vMfBcMpn8lqeW6vzznYY5SSQF7pMdC_agI3nG8Ibp1BUb0JUiraRNqUfLhcQb_d9
  // GF4Dh7e74WbRsobRonujTYN1xCaP6TO61jvWrX-L18txXw494Q_cgk",
  //       "qi": "GyM_p6JrXySiz1toFgKbWV-JdI3jQ4ypu9rbMWx3rQJBfmt0FoYzg
  // UIZEVFEcOqwemRN81zoDAaa-Bk0KWNGDjJHZDdDmFhW3AN7lI-puxk_mHZGJ11rx
  // yR8O55XLSe3SPmRfKwZI6yU24ZxvQKFYItdldUKGzO6Ia6zTKhAVRU",
  //       "alg": "RS256",
  //       "kid": "2011-04-29"
  //     },
  //     { 
  //       "kty": "oct",
  //       "alg": "A128KW",
  //       "k": "GawgguFyGrWKav7AX4VKUg",
  //       "kid": "AES KEK"
  //     },
  //     { 
  //       "kty": "oct",
  //       "k": "AyM1SysPpbyDfgZld3umj1qzKObwVMkoqQ-EstJQLr_T-1qS0gZH75
  // aKtMN3Yj0iPS4hcgUuTwjAzZr1Z9CAow",
  //       "kid": "HMAC key used in JWS spec Appendix A.1 example"
  //     }
  //   ]
  // }
  // 
  // ---- JWK 0 ----
  // { 
  //   "kty": "EC",
  //   "crv": "P-256",
  //   "x": "MKBCTNIcKUSDii11ySs3526iDZ8AiTo7Tu6KPAqv7D4",
  //   "y": "4Etl6SRW2YiLUrN5vfvVHuhp7x8PxltmWWlbbM4IFyM",
  //   "d": "870MB6gfuTJ4HtUnUvYMyJpr5eUZNP4Bk43bVdj3eAE",
  //   "use": "enc",
  //   "kid": "1"
  // }
  // 
  // ---- JWK 1 ----
  // { 
  //   "kty": "RSA",
  //   "n": "0vx7agoebGcQSuuPiLJXZptN9nndrQmbXEps2aiAFbWhM78LhWx4
  // cbbfAAtVT86zwu1RK7aPFFxuhDR1L6tSoc_BJECPebWKRXjBZCiFV4n3oknjhMst
  // n64tZ_2W-5JsGY4Hc5n9yBXArwl93lqt7_RN5w6Cf0h4QyQ5v-65YGjQR0_FDW2Q
  // vzqY368QQMicAtaSqzs8KJZgnYb9c7d0zgdAZHzu6qMQvRL5hajrn1n91CbOpbIS
  // D08qNLyrdkt-bFTWhAI4vMQFh6WeZu0fM4lFd2NcRwr3XPksINHaQ-G_xBniIqbw
  // 0Ls1jF44-csFCur-kEgU8awapJzKnqDKgw",
  //   "e": "AQAB",
  //   "d": "X4cTteJY_gn4FYPsXB8rdXix5vwsg1FLN5E3EaG6RJoVH-HLLKD9
  // M7dx5oo7GURknchnrRweUkC7hT5fJLM0WbFAKNLWY2vv7B6NqXSzUvxT0_YSfqij
  // wp3RTzlBaCxWp4doFk5N2o8Gy_nHNKroADIkJ46pRUohsXywbReAdYaMwFs9tv8d
  // _cPVY3i07a3t8MN6TNwm0dSawm9v47UiCl3Sk5ZiG7xojPLu4sbg1U2jx4IBTNBz
  // nbJSzFHK66jT8bgkuqsk0GjskDJk19Z4qwjwbsnn4j2WBii3RL-Us2lGVkY8fkFz
  // me1z0HbIkfz0Y6mqnOYtqc0X4jfcKoAC8Q",
  //   "p": "83i-7IvMGXoMXCskv73TKr8637FiO7Z27zv8oj6pbWUQyLPQBQxtPV
  // nwD20R-60eTDmD2ujnMt5PoqMrm8RfmNhVWDtjjMmCMjOpSXicFHj7XOuVIYQyqV
  // WlWEh6dN36GVZYk93N8Bc9vY41xy8B9RzzOGVQzXvNEvn7O0nVbfs",
  //   "q": "3dfOR9cuYq-0S-mkFLzgItgMEfFzB2q3hWehMuG0oCuqnb3vobLyum
  // qjVZQO1dIrdwgTnCdpYzBcOfW5r370AFXjiWft_NGEiovonizhKpo9VVS78TzFgx
  // kIdrecRezsZ-1kYd_s1qDbxtkDEgfAITAG9LUnADun4vIcb6yelxk",
  //   "dp": "G4sPXkc6Ya9y8oJW9_ILj4xuppu0lzi_H7VTkS8xj5SdX3coE0oim
  // YwxIi2emTAue0UOa5dpgFGyBJ4c8tQ2VF402XRugKDTP8akYhFo5tAA77Qe_Nmtu
  // YZc3C3m3I24G2GvR5sSDxUyAN2zq8Lfn9EUms6rY3Ob8YeiKkTiBj0",
  //   "dq": "s9lAH9fggBsoFR8Oac2R_E2gw282rT2kGOAhvIllETE1efrA6huUU
  // vMfBcMpn8lqeW6vzznYY5SSQF7pMdC_agI3nG8Ibp1BUb0JUiraRNqUfLhcQb_d9
  // GF4Dh7e74WbRsobRonujTYN1xCaP6TO61jvWrX-L18txXw494Q_cgk",
  //   "qi": "GyM_p6JrXySiz1toFgKbWV-JdI3jQ4ypu9rbMWx3rQJBfmt0FoYzg
  // UIZEVFEcOqwemRN81zoDAaa-Bk0KWNGDjJHZDdDmFhW3AN7lI-puxk_mHZGJ11rx
  // yR8O55XLSe3SPmRfKwZI6yU24ZxvQKFYItdldUKGzO6Ia6zTKhAVRU",
  //   "alg": "RS256",
  //   "kid": "2011-04-29"
  // }
  // 
  // ---- JWK 2 ----
  // { 
  //   "kty": "oct",
  //   "alg": "A128KW",
  //   "k": "GawgguFyGrWKav7AX4VKUg",
  //   "kid": "AES KEK"
  // }
  // 
  // ---- JWK 3 ----
  // { 
  //   "kty": "oct",
  //   "k": "AyM1SysPpbyDfgZld3umj1qzKObwVMkoqQ-EstJQLr_T-1qS0gZH75
  // aKtMN3Yj0iPS4hcgUuTwjAzZr1Z9CAow",
  //   "kid": "HMAC key used in JWS spec Appendix A.1 example"
  // }
  // 
}