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Javascript Object Signing and Encryption (JOSE) library supporting JWE, JWS, JWK and JWT

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Javascript Object Signing and Encryption (JOSE) library

Supports JSON Web Signature (JWS), JSON Web Encryption (JWE), JSON Web Key (JWK) and JSON Web Token (JWT).

Supported JSON Web Algorithms #

This package supports a lot of the algorithms defined in the standards.

Siging algorithms for JWS #

  • HS256 HMAC using SHA-256
  • HS384 HMAC using SHA-384
  • HS512 HMAC using SHA-512
  • RS256 RSASSA-PKCS1-v1_5 using SHA-256
  • RS384 RSASSA-PKCS1-v1_5 using SHA-384
  • RS512 RSASSA-PKCS1-v1_5 using SHA-512
  • ES256 ECDSA using P-256 and SHA-256
  • ES256K ECDSA using P-256K and SHA-256
  • ES384 ECDSA using P-384 and SHA-384
  • ES512 ECDSA using P-521 and SHA-512
  • none No digital signature or MAC

Key wrapping algorithms for JWE #

  • RSA1_5 RSAES-PKCS1-v1_5
  • RSA-OAEP RSAES OAEP using default parameters
  • RSA-OAEP-256 RSAES OAEP using SHA-256 and MGF1 with SHA-256
  • A128KW AES Key Wrap with default initial value using 128-bit key
  • A192KW AES Key Wrap with default initial value using 192-bit key
  • A256KW AES Key Wrap with default initial value using 256-bit key
  • dir Direct use of a shared symmetric key as the CEK

Encryption Algorithms for JWE #

  • A128CBC-HS256 AES_128_CBC_HMAC_SHA_256 authenticated encryption algorithm
  • A192CBC-HS384 AES_192_CBC_HMAC_SHA_384 authenticated encryption algorithm
  • A256CBC-HS512 AES_256_CBC_HMAC_SHA_512 authenticated encryption algorithm
  • A128GCM AES GCM using 128-bit key
  • A192GCM AES GCM using 192-bit key
  • A256GCM AES GCM using 256-bit key

Usage #

Decode and verify a JWS #

main() async {
    var encoded = "eyJhbGciOiJFUzUxMiJ9."
      "UGF5bG9hZA."
      "AdwMgeerwtHoh-l192l60hp9wAHZFVJbLfD_UxMi70cwnZOYaRI1bKPWROc-mZZq"
      "wqT2SI-KGDKB34XO0aw_7XdtAG8GaSwFKdCAPZgoXD2YBJZCPEX3xKpRwcdOO8Kp"
      "EHwJjyqOgzDO7iKvU8vcnwNrmxYbSW9ERBXukOXolLzeO_Jn";
    
    // create a JsonWebSignature from the encoded string
    var jws = JsonWebSignature.fromCompactSerialization(encoded);
    
    // extract the payload
    var payload = jws.unverifiedPayload;
    
    print("content of jws: ${payload.stringContent}");
    print("protected parameters: ${payload.protectedHeader.toJson()}");
    
    // create a JsonWebKey for verifying the signature
    var jwk = new JsonWebKey.fromJson({
        "kty": "EC",
        "crv": "P-521",
        "x": "AekpBQ8ST8a8VcfVOTNl353vSrDCLLJXmPk06wTjxrrjcBpXp5EOnYG_"
            "NjFZ6OvLFV1jSfS9tsz4qUxcWceqwQGk",
        "y": "ADSmRA43Z1DSNx_RvcLI87cdL07l6jQyyBXMoxVg_l2Th-x3S1WDhjDl"
            "y79ajL4Kkd0AZMaZmh9ubmf63e3kyMj2",
        "d": "AY5pb7A0UFiB3RELSD64fTLOSV_jazdF7fLYyuTw8lOfRhWg6Y6rUrPA"
            "xerEzgdRhajnu0ferB0d53vM9mE15j2C"
    });
    var keyStore = new JsonWebKeyStore()..addKey(jwk);
    
    // verify the signature
    var verified = await jws.verify(keyStore);
    print("signature verified: $verified");
}

Create a JWS #

main() async {
  // create a builder
  var builder = new JsonWebSignatureBuilder();

  // set the content
  builder.stringContent = "It is me";

  // set some protected header
  builder.setProtectedHeader("createdAt", new DateTime.now().toIso8601String());

  // add a key to sign, you can add multiple keys for different recipients
  builder.addRecipient(
      new JsonWebKey.fromJson({
        "kty": "oct",
        "k":
            "AyM1SysPpbyDfgZld3umj1qzKObwVMkoqQ-EstJQLr_T-1qS0gZH75aKtMN3Yj0iPS4hcgUuTwjAzZr1Z9CAow"
      }),
      algorithm: "HS256");

  // build the jws
  var jws = builder.build();

  // output the compact serialization
  print("jws compact serialization: ${jws.toCompactSerialization()}");

  // output the json serialization
  print("jws json serialization: ${jws.toJson()}");
}

Decode and decrypt a JWE #

main() async {
  var encoded = "eyJhbGciOiJSU0ExXzUiLCJlbmMiOiJBMTI4Q0JDLUhTMjU2In0."
      "UGhIOguC7IuEvf_NPVaXsGMoLOmwvc1GyqlIKOK1nN94nHPoltGRhWhw7Zx0-kFm"
      "1NJn8LE9XShH59_i8J0PH5ZZyNfGy2xGdULU7sHNF6Gp2vPLgNZ__deLKxGHZ7Pc"
      "HALUzoOegEI-8E66jX2E4zyJKx-YxzZIItRzC5hlRirb6Y5Cl_p-ko3YvkkysZIF"
      "NPccxRU7qve1WYPxqbb2Yw8kZqa2rMWI5ng8OtvzlV7elprCbuPhcCdZ6XDP0_F8"
      "rkXds2vE4X-ncOIM8hAYHHi29NX0mcKiRaD0-D-ljQTP-cFPgwCp6X-nZZd9OHBv"
      "-B3oWh2TbqmScqXMR4gp_A."
      "AxY8DCtDaGlsbGljb3RoZQ."
      "KDlTtXchhZTGufMYmOYGS4HffxPSUrfmqCHXaI9wOGY."
      "9hH0vgRfYgPnAHOd8stkvw";

  // create a JsonWebEncryption from the encoded string
  var jwe = JsonWebEncryption.fromCompactSerialization(encoded);

  // create a JsonWebKey for decrypting the signature
  var jwk = new JsonWebKey.fromJson(
    {
      "kty": "RSA",
      "n": "sXchDaQebHnPiGvyDOAT4saGEUetSyo9MKLOoWFsueri23bOdgWp4Dy1Wl"
          "UzewbgBHod5pcM9H95GQRV3JDXboIRROSBigeC5yjU1hGzHHyXss8UDpre"
          "cbAYxknTcQkhslANGRUZmdTOQ5qTRsLAt6BTYuyvVRdhS8exSZEy_c4gs_"
          "7svlJJQ4H9_NxsiIoLwAEk7-Q3UXERGYw_75IDrGA84-lA_-Ct4eTlXHBI"
          "Y2EaV7t7LjJaynVJCpkv4LKjTTAumiGUIuQhrNhZLuF_RJLqHpM2kgWFLU"
          "7-VTdL1VbC2tejvcI2BlMkEpk1BzBZI0KQB0GaDWFLN-aEAw3vRw",
      "e": "AQAB",
      "d": "VFCWOqXr8nvZNyaaJLXdnNPXZKRaWCjkU5Q2egQQpTBMwhprMzWzpR8Sxq"
          "1OPThh_J6MUD8Z35wky9b8eEO0pwNS8xlh1lOFRRBoNqDIKVOku0aZb-ry"
          "nq8cxjDTLZQ6Fz7jSjR1Klop-YKaUHc9GsEofQqYruPhzSA-QgajZGPbE_"
          "0ZaVDJHfyd7UUBUKunFMScbflYAAOYJqVIVwaYR5zWEEceUjNnTNo_CVSj"
          "-VvXLO5VZfCUAVLgW4dpf1SrtZjSt34YLsRarSb127reG_DUwg9Ch-Kyvj"
          "T1SkHgUWRVGcyly7uvVGRSDwsXypdrNinPA4jlhoNdizK2zF2CWQ",
      "p": "9gY2w6I6S6L0juEKsbeDAwpd9WMfgqFoeA9vEyEUuk4kLwBKcoe1x4HG68"
          "ik918hdDSE9vDQSccA3xXHOAFOPJ8R9EeIAbTi1VwBYnbTp87X-xcPWlEP"
          "krdoUKW60tgs1aNd_Nnc9LEVVPMS390zbFxt8TN_biaBgelNgbC95sM",
      "q": "uKlCKvKv_ZJMVcdIs5vVSU_6cPtYI1ljWytExV_skstvRSNi9r66jdd9-y"
          "BhVfuG4shsp2j7rGnIio901RBeHo6TPKWVVykPu1iYhQXw1jIABfw-MVsN"
          "-3bQ76WLdt2SDxsHs7q7zPyUyHXmps7ycZ5c72wGkUwNOjYelmkiNS0",
      "dp": "w0kZbV63cVRvVX6yk3C8cMxo2qCM4Y8nsq1lmMSYhG4EcL6FWbX5h9yuv"
          "ngs4iLEFk6eALoUS4vIWEwcL4txw9LsWH_zKI-hwoReoP77cOdSL4AVcra"
          "Hawlkpyd2TWjE5evgbhWtOxnZee3cXJBkAi64Ik6jZxbvk-RR3pEhnCs",
      "dq": "o_8V14SezckO6CNLKs_btPdFiO9_kC1DsuUTd2LAfIIVeMZ7jn1Gus_Ff"
          "7B7IVx3p5KuBGOVF8L-qifLb6nQnLysgHDh132NDioZkhH7mI7hPG-PYE_"
          "odApKdnqECHWw0J-F0JWnUd6D2B_1TvF9mXA2Qx-iGYn8OVV1Bsmp6qU",
      "qi": "eNho5yRBEBxhGBtQRww9QirZsB66TrfFReG_CcteI1aCneT0ELGhYlRlC"
          "tUkTRclIfuEPmNsNDPbLoLqqCVznFbvdB7x-Tl-m0l_eFTj2KiqwGqE9PZ"
          "B9nNTwMVvH3VRRSLWACvPnSiwP8N5Usy-WRXS-V7TbpxIhvepTfE0NNo"
    },
  );
  var keyStore = new JsonWebKeyStore()..addKey(jwk);

  // decrypt the payload
  var payload = await jwe.getPayload(keyStore);
  print("decrypted content: ${payload.stringContent}");
}

Create a JWE #

main() async {
  // create a builder
  var builder = new JsonWebEncryptionBuilder();

  // set the content
  builder.stringContent = "This is my bigest secret";

  // set some protected header
  builder.setProtectedHeader("createdAt", new DateTime.now().toIso8601String());

  // add a key to encrypt the Content Encryption Key
  var jwk = new JsonWebKey.fromJson(
    {
      "kty": "RSA",
      "n": "sXchDaQebHnPiGvyDOAT4saGEUetSyo9MKLOoWFsueri23bOdgWp4Dy1Wl"
          "UzewbgBHod5pcM9H95GQRV3JDXboIRROSBigeC5yjU1hGzHHyXss8UDpre"
          "cbAYxknTcQkhslANGRUZmdTOQ5qTRsLAt6BTYuyvVRdhS8exSZEy_c4gs_"
          "7svlJJQ4H9_NxsiIoLwAEk7-Q3UXERGYw_75IDrGA84-lA_-Ct4eTlXHBI"
          "Y2EaV7t7LjJaynVJCpkv4LKjTTAumiGUIuQhrNhZLuF_RJLqHpM2kgWFLU"
          "7-VTdL1VbC2tejvcI2BlMkEpk1BzBZI0KQB0GaDWFLN-aEAw3vRw",
      "e": "AQAB",
      "d": "VFCWOqXr8nvZNyaaJLXdnNPXZKRaWCjkU5Q2egQQpTBMwhprMzWzpR8Sxq"
          "1OPThh_J6MUD8Z35wky9b8eEO0pwNS8xlh1lOFRRBoNqDIKVOku0aZb-ry"
          "nq8cxjDTLZQ6Fz7jSjR1Klop-YKaUHc9GsEofQqYruPhzSA-QgajZGPbE_"
          "0ZaVDJHfyd7UUBUKunFMScbflYAAOYJqVIVwaYR5zWEEceUjNnTNo_CVSj"
          "-VvXLO5VZfCUAVLgW4dpf1SrtZjSt34YLsRarSb127reG_DUwg9Ch-Kyvj"
          "T1SkHgUWRVGcyly7uvVGRSDwsXypdrNinPA4jlhoNdizK2zF2CWQ",
      "p": "9gY2w6I6S6L0juEKsbeDAwpd9WMfgqFoeA9vEyEUuk4kLwBKcoe1x4HG68"
          "ik918hdDSE9vDQSccA3xXHOAFOPJ8R9EeIAbTi1VwBYnbTp87X-xcPWlEP"
          "krdoUKW60tgs1aNd_Nnc9LEVVPMS390zbFxt8TN_biaBgelNgbC95sM",
      "q": "uKlCKvKv_ZJMVcdIs5vVSU_6cPtYI1ljWytExV_skstvRSNi9r66jdd9-y"
          "BhVfuG4shsp2j7rGnIio901RBeHo6TPKWVVykPu1iYhQXw1jIABfw-MVsN"
          "-3bQ76WLdt2SDxsHs7q7zPyUyHXmps7ycZ5c72wGkUwNOjYelmkiNS0",
      "dp": "w0kZbV63cVRvVX6yk3C8cMxo2qCM4Y8nsq1lmMSYhG4EcL6FWbX5h9yuv"
          "ngs4iLEFk6eALoUS4vIWEwcL4txw9LsWH_zKI-hwoReoP77cOdSL4AVcra"
          "Hawlkpyd2TWjE5evgbhWtOxnZee3cXJBkAi64Ik6jZxbvk-RR3pEhnCs",
      "dq": "o_8V14SezckO6CNLKs_btPdFiO9_kC1DsuUTd2LAfIIVeMZ7jn1Gus_Ff"
          "7B7IVx3p5KuBGOVF8L-qifLb6nQnLysgHDh132NDioZkhH7mI7hPG-PYE_"
          "odApKdnqECHWw0J-F0JWnUd6D2B_1TvF9mXA2Qx-iGYn8OVV1Bsmp6qU",
      "qi": "eNho5yRBEBxhGBtQRww9QirZsB66TrfFReG_CcteI1aCneT0ELGhYlRlC"
          "tUkTRclIfuEPmNsNDPbLoLqqCVznFbvdB7x-Tl-m0l_eFTj2KiqwGqE9PZ"
          "B9nNTwMVvH3VRRSLWACvPnSiwP8N5Usy-WRXS-V7TbpxIhvepTfE0NNo"
    },
  );
  builder.addRecipient(jwk, algorithm: "RSA1_5");

  // set the content encryption algorithm to use
  builder.encryptionAlgorithm = "A128CBC-HS256";

  // build the jws
  var jwe = builder.build();

  // output the compact serialization
  print("jwe compact serialization: ${jwe.toCompactSerialization()}");

  // output the json serialization
  print("jwe json serialization: ${jwe.toJson()}");
}

Decode and verify and validate a JWT #

main() async {
  var encoded = "eyJ0eXAiOiJKV1QiLA0KICJhbGciOiJIUzI1NiJ9."
      "eyJpc3MiOiJqb2UiLA0KICJleHAiOjEzMDA4MTkzODAsDQogImh0dHA6Ly9leGFt"
      "cGxlLmNvbS9pc19yb290Ijp0cnVlfQ."
      "dBjftJeZ4CVP-mB92K27uhbUJU1p1r_wW1gFWFOEjXk";

  // decode the jwt, note: this constructor can only be used for JWT inside JWS
  // structures
  var jwt = new JsonWebToken.unverified(encoded);

  // output the claims
  print("claims: ${jwt.claims}");

  // create key store to verify the signature
  var keyStore = new JsonWebKeyStore()
    ..addKey(new JsonWebKey.fromJson({
      "kty": "oct",
      "k":
          "AyM1SysPpbyDfgZld3umj1qzKObwVMkoqQ-EstJQLr_T-1qS0gZH75aKtMN3Yj0iPS4hcgUuTwjAzZr1Z9CAow"
    }));

  var verified = await jwt.verify(keyStore);
  print("verified: $verified");

  // alternatively, create and verify the JsonWebToken together, this is also
  // applicable for JWT inside JWE
  jwt = await JsonWebToken.decodeAndVerify(encoded, keyStore);

  // validate the claims
  var violations = jwt.claims.validate(issuer: Uri.parse("alice"));
  print("violations: $violations");
}

Create a JWT #


main() async {
  var claims = new JsonWebTokenClaims.fromJson({
    "exp": new Duration(hours: 4).inSeconds,
    "iss": "alice",
  });

  // create a builder, decoding the JWT in a JWS, so using a
  // JsonWebSignatureBuilder
  var builder = new JsonWebSignatureBuilder();

  // set the content
  builder.jsonContent = claims.toJson();

  // add a key to sign, can only add one for JWT
  builder.addRecipient(
      new JsonWebKey.fromJson({
        "kty": "oct",
        "k":
            "AyM1SysPpbyDfgZld3umj1qzKObwVMkoqQ-EstJQLr_T-1qS0gZH75aKtMN3Yj0iPS4hcgUuTwjAzZr1Z9CAow"
      }),
      algorithm: "HS256");

  // build the jws
  var jws = builder.build();

  // output the compact serialization
  print("jwt compact serialization: ${jws.toCompactSerialization()}");
}

Features and bugs #

Please file feature requests and bugs at the issue tracker.

Creating and maintaining this package takes a lot of time. If you like the result, please consider to ❤️ sponsor. With your support, I will be able to further improve and support this project. Also, check out my other dart packages at pub.dev.

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Publisher

verified publisherbdaya-dev.com

Javascript Object Signing and Encryption (JOSE) library supporting JWE, JWS, JWK and JWT

Repository (GitHub)
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Documentation

API reference

Funding

Consider supporting this project:

github.com

License

BSD-3-Clause (LICENSE)

Dependencies

asn1lib, collection, crypto_keys_plus, http, http_parser, meta, typed_data, x509_plus

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