If you have a large number of users, you can end up with a slow server unless you use alternative session storage options, such as Memcached and Redis. The same goes for every time the application sends a session cookie. They involve filesystem read/write requests.Įvery time a session starts or its data is modified, the server needs to update the session file.Data is stored in plain text on the server.Įven though the data is usually not stored in a public folder, anyone with sufficient access to the server can read the contents of session files.The code simply becomes: from first, why are sessions not such a good thing? Well, there are three key reasons: Microsoft's package msal provides a function to decode the id token. Here is the full code: # Get the public keys from Microsoftįrom import serializationĪlg = jwt.get_unverified_header(your-id-token) However omitting this argument all together allowed me to decode the ID token. Even replacing the issuer argument by did not work for me. The code provided by OP gives me the exception InvalidIssuerError. There are at least 2 options to decode Microsoft Azure AD ID tokens: Option 1: Using jwt After creating slight modifications I now receive an id_token, which can be decoded and verified. So it turns out that my verification code was correct, but that I was trying to verify the wrong token. Also, there is a secret key in the app registration in Azure, but it does not seem to work either. What is next?Ĭan you guys see any obvious errors? My main guess is that there is something wrong with the audience or the issuer, but I cannot pin down what it is, and Microsoft's documentation is horrible as always. Placing the x5c into the certificate pre- and postfixes just generated errors of invalid formatting. I also tried to follow this popular guide: How to verify JWT id_token produced by MS Azure AD? The result I get is: : Signature verification failed The last thing I need to do is to verify the token using the public key. This is what the Azure Public Key looks like: b'-BEGIN PUBLIC KEY-\nMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAyr3v1uETrFfT17zvOiy0\n1w8nO+1t67cmiZLZxq2ISDdte9dw+IxCR7lPV2wezczIRgcWmYgFnsk2j6m10H4t\nKzcqZM0JJ/NigY29pFimxlL7/qXMB1PorFJdlAKvp5SgjSTwLrXjkr1AqWwbpzG2\nyZUNN3GE8GvmTeo4yweQbNCd+yO/Zpozx0J34wHBEMuaw+ZfCUk7mdKKsg+EcE4Z\nv0Xgl9wP2MpKPx0V8gLazxe6UQ9ShzNuruSOncpLYJN/oQ4aKf5ptOp1rsfDY2IK\n9frtmRTKOdQ+MEmSdjGL/88IQcvCs7jqVz53XKoXRlXB8tMIGOcg+ICer6yxe2it\nIQIDAQAB\n-END PUBLIC KEY-\n' Rsa_pem_key_bytes = rsa_pem_key.public_bytes(įormat= Rsa_pem_key = _jwk(json.dumps(public_key)) Before I can use it for decoding, I need to convert it to a RSA PEM key. Now I have the correct public key from Azure to verify my token, but the problem is that it is a JWT key. Token_headers = jwt.get_unverified_header(my_token) I also get which algorithm was used for encryption. To match up the public key to the token, I use the 'kid' in the token header. Next I need public keys from Azure for verifying the token. If I throw the token into a site like everything looks good. My_token = ad_auth_client.acquire_token_for_client(scopes=) import msalĪd_auth_client = msal.ConfidentialClientApplication( Using the credentials from the Azure Portal I set up a client for getting tokens. And I use a public key from Azure to verify the token. In Python I use the MSAL package for receiving tokens. In Azure I have created an app registration with the setting "Personal Microsoft accounts only". I, however, keep getting the error "Signature verification failed". When I receive a JWK from Azure AD in Python, I would like to validate and decode it.
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