authentication tag mismatch

[ravenet]

Hi,

First I would like to thank for nice library, but When I use JWE to decrypt data, I am gettting above error.

my method,
MethodOne(string chiperText, JweAlgorithm algorithm = JweAlgorithm.RSA1_5, JweEncryption encryption = JweEncryption.A128GCM)
{

//Where I am passing data
Jose.JWT.Decode(chiperText.Trim(), keyHolderInfo.PrivateKey, algorithm, encryption)

}

Please advice why i am getting that error.

Thank you

[dvsekhvalnov]

Hi @ravenet ,

tag mismatch - usually means signature doesn't match payload. (E.g. corrupted or tampered).

For troubleshooting can you add little bit more info? Like example of token you trying to decode and keys? (Well assuming that's not production used keys).

[ravenet]

Hi Dvsekhvalnov,
Thank you for your response, and I am using test RSA private key. let me send code then it easy to you see the issue.

https://gist.github.com/ravenet/46feeace86d683df90f3956aba96fe21

Here is all detail in code and please let me know if you require any more details.

Thank you

[dvsekhvalnov]

@ravenet , i'm getting same when trying to decode your nested encrypted token, it looks nested token is changed after encryption, that's why it is not passing. So:

1. Can you show part that creates token (both nested and envelope)?
2. Why you have that weird nested thing at all? What's point of signing encrypted token once more?

[ravenet]

Hi,

Thank you and let me share with you and any idea why it is nested? and in test methods which one is suitable for this case.

Thank you

[dvsekhvalnov]

Sure @ravenet , go for it.

[dvsekhvalnov]

Closing due to inactivity. Feel free to reopen.

[Dhazan1]

I'm encrypting, then immediately I'm decrypting, but I keep getting this error

Jose.EncryptionException: 'Unable to decrypt content or authentication tag do not match.'

[Dhazan1]

This is the link to the code write-up

[Dhazan1]

https://github.com/Dhazan1/JoseLibraryImplementationInAsp.net/tree/main

[dvsekhvalnov]

Hi @Dhazan1, mind open new ticket?

i'll try to take a look.

[Dhazan1]

New ticket opened
#195