![]() That's why can also decode the token without knowing the key. For the actual decoding, no key is needed because the payload is just Base64Url encoded. ![]() In case of a failed verification, the Decode-function would throw an exception.Īs a side note: the Decode-function actually verifies the signature before decoding, and that's for what it needs the key. String payload = (token, publicKey, JwsAlgorithm.ES256) Īs a result the token will be verified and the payload will be printed. Var publicKey = new X509Certificate2("x509.pem").GetECDsaPublicKey() String token = "eyJhbGciOiJFUzI1NiIsInBwdCI6InNoYWtlbiIsInR5cCI6InBhc3Nwb3J0IiwieDV1IjoiaHR0cHM6Ly9jci5zYW5zYXkuY29tL1RlY2hub2xvZ3lfSW5ub3ZhdGlvbl9MYWJfNTk5SiJ9.eyJhdHRlc3QiOiJCIiwiZGVzdCI6eyJ0biI6WyIxNDc5MjM5OTcwMyJdfSwiaWF0IjoxNjU5NTIxNDU5LCJvcmlnIjp7InRuIjoiMTQ2OTUwMTYwNzAifSwib3JpZ2lkIjoiOTIzNDIxOTgtMTMxNC0xMWVkLWExM2QtYmRjMWMxZDI4ODg4In0.8RF_eaVKeGGyjet4lujwPz0J_XBdtwkSKrnrOq7-pA6ODtJPD1parLgimEpDUyzSravtTaxuACxBz4yrKtMZgw" Here is a simple demo (based on the examples in the Jose-JWT GitHub repo: using Jose The public key certificate is provided in the URL that is given in the header in the X5U-claim, which is a URL pointing to a X.509 certificate.įor the demo below and to keep it simple, I saved the certificate to a file name x509.pem. The token is actually signed with the ES256 algorithm, not HS256. Trying the token above on Debugger works and returns the following: Jose.InvalidAlgorithmException: 'The algorithm type passed to the Decode method did not match the algorithm type in the header.' String x = (token, Nothing, JweAlgorithm.PBES2_HS256_A128KW) NET library: string token = "eyJhbGciOiJFUzI1NiIsInBwdCI6InNoYWtlbiIsInR5cCI6InBhc3Nwb3J0IiwieDV1IjoiaHR0cHM6Ly9jci5zYW5zYXkuY29tL1RlY2hub2xvZ3lfSW5ub3ZhdGlvbl9MYWJfNTk5SiJ9.eyJhdHRlc3QiOiJCIiwiZGVzdCI6eyJ0biI6WyIxNDc5MjM5OTcwMyJdfSwiaWF0IjoxNjU5NTIxNDU5LCJvcmlnIjp7InRuIjoiMTQ2OTUwMTYwNzAifSwib3JpZ2lkIjoiOTIzNDIxOTgtMTMxNC0xMWVkLWExM2QtYmRjMWMxZDI4ODg4In0.8RF_eaVKeGGyjet4lujwPz0J_XBdtwkSKrnrOq7-pA6ODtJPD1parLgimEpDUyzSravtTaxuACxBz4yrKtMZgw" ![]() According to what I have read of JWT it contains three parts: header, payload and signature - base64 encoded strings separated by a dot. I am trying to decode a STIR/SHAKEN HS256 JSON Web Token. I have been trying without success to decrypt payload, a JSON web token that should contain personal information as the user data part of OAuth2 flow.
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