I have a validate-jwt instruction in my APIM API policy (<inbound> section).
I am sending a hopefully correct token in a header and the request still fails.
What would be the way to find out from the APIM which specific JWT token validation check has failed?
I have figured out how to do the logging.
Enable Application Insights for APIM, set 100% sampling for your desired API and enable necessary flags (see Application Insights for APIM.
In the designated Application Insights instance, the JWT token issues are found if you query
exceptions
| where type contains "Token"
Note that type is different depending on what is wrong with the JWT token, but I am speculating that all relevant types might start with "Token..."
so you get something like
IDX10205: Issuer validation failed. Issuer: 'https://sts.windows.net/(abriged UUID)/'. Did not match: validationParameters.ValidIssuer: '' or validationParameters.ValidIssuers: 'https://login.microsoftonline.com/{tenantid}/v2.0'.
outerMethod
validate-jwt
Also, from App Insights' Application map one can click through to failed requests and drill down to exceptions arriving at similar log outputs.
Have you checked that the JWT is in fact valid? To do this you can paste the whole token value to https://jwt.ms in order to decode the token to see if you are missing any information.
If the token is valid, I would suggest setting up Application Insights for APIM if you haven't done that already and see if you can get any more relevant information from the logs there.
Related
The goal is to have an application, running on the user's computer authenticated as either themselves or a service principal, that can perform Azure resource management operations and Key Vault secret (data plane) operations.
So far, the resource operations are working fine with the management.azure.com audience, but the Key Vault data operations naturally fail with an error
Invalid audience. Expected https://vault.azure.net, found: https://management.azure.com
I've pored over the docs but it's not entirely clear to me if it's possible to have a single token for both audiences? Here, e.g., it suggests you can simply request multiple scopes, but other sources seem to say they must be for the same resource?
Several of MSAL's token acquisition methods require a scopes parameter. The scopes parameter is a list of strings that declare the desired permissions and the resources requested.
A single token would vastly simplify the application, similar to how ADAL used to work.
You cannot acquire one token for multiple audiences in AAD. This is not supported for token acquisition and also not by the actual services. This is not a MSAL limitation, ADAL cannot do this either. ADAL might request/store multiple tokens internally. You need to manage multiple tokens in this case.
Everything documented by Venkatesan is correct, just giving it a bit more context as an explanation.
See also https://github.com/MicrosoftDocs/azure-docs/issues/82875
I tried to reproduce in my environment and got below results:
Invalid audience. Expected
https://vault.azure.net , found: https://management.azure.com
The above error refers that audience of your token to call Azure Keyvault REST API you need to call the audience with https://vault.azure.net
I tried with postman to get token in my environment, ensure you have Registered AD application and keyvault with right process.
Before that check your Azure Keyvault policy and secrets to ensure that no Authorized application is chosen, and use a service principle rather than an application to access the secret.
When I tried with scope https://management.azure.com in postman and got access token.
Then I copied the token to call the REST API to set secret.I got similar error.
When I tried with scope https://vault.azure.net I got an output sucessfully.
Then I copied the token and called API & set secret, it will work fine.
When I decoded token i'm getting aud with jwt.ms
Reference:
https://learn.microsoft.com/en-us/azure/active-directory/develop/v2-permissions-and-consent
I'm unclear on whether I've missed something with the way API Management Gateway/Azure Function communications work. Initial requests are supposed to contain a JWT which contains server-signed assertions related to user roles.
Within APIM/Azure Functions, there is the concept of a 'shared secret' used to authenticate B2B communications. Which means that some level of trust occurs between the two systems.
Obviously, I could implement JWT validation in both places, but I cannot find any documentation from Microsoft or similar that says 'here's how you're supposed to do it.'.
• There is no official documentation from Microsoft regarding JWT validation in APIM as most of the documentation is related to the policies regarding the usage of authentication, access restriction, caching, cross-domain, distributed application runtime, integration, transformation, etc. in APIM. But you surely can refer to the link below which is no less than a documentation that explains elaborately how the policies in APIM can be used to achieve the results for various operations defined in the workspace.
https://azure.github.io/apim-lab/apim-lab/7-security/apimanagement-7-1-JWT-Validation.html
• According to the above link, JWT validation happens at the Azure B2B end as the token issued to the app service is validated against the configured authorization and access policies defined while granting access to perform the required operations for the app service. For your confirmation purpose, you can add a validate the JWT policy for the concerned app service in your APIM as given in the below link to confirm the source where the JWT validation happens. For that purpose, you will need an orchestration app like ‘Postman’ and create a corresponding app registration in Azure AD for the correct validation results: -
https://carldesouza.com/adding-a-validate-jwt-policy-to-azure-api-management/
In the above links, you will get an overall understanding of the various parameters which are included and need to validate in the payload, header, and signature section to ensure that the JWT is a genuine one.
I've beed trying to get azure-ad-b2c to be a IDP with localaccounts for Splunk SAML SSO.
with
https://learn.microsoft.com/en-us/azure/active-directory-b2c/custom-policy-get-started
https://github.com/Azure-Samples/active-directory-b2c-custom-policy-starterpack
https://learn.microsoft.com/en-us/azure/active-directory-b2c/connect-with-saml-service-providers
Presently I've got different error messages like
Verification of SAML assertion using the IDP's certificate provided
failed. Unknown signer of SAML response
Verification of SAML
assertion using the IDP's certificate provided failed. Error: failed
to verify signature with cert
Also, given I get this to work, I still need to extract security group association and exposed to Splunk. I think this article is relevant....
Anyone have a good writeup to get this going?
Brgds
Kristen
If this is a new B2C setup, have you used the MS Azure test app to verify?
https://samltestapp2.azurewebsites.net/SP
Based on the error, it sounds like Splunk needs to trust the certificate used for SAML signatures.
I'm trying to validate access_token retrieved by Microsoft Identity Platform when token request is done (/common/oauth2/v2.0/token), but always I get an invalid format error on any validator even online ones like jwt.io. Do you know why?
My post from a while back may help you to understand the validation process.
A couple of common things to check:
Is there a 'nonce" field in the JWT header? If so it will fail validation and is not designed for your (custom) APIs to validate
Does token validation work if you use the Azure AD v1 endpoints?
The following page shows how can I purge Application Insights data -
https://learn.microsoft.com/en-us/rest/api/application-insights/components/purge
I tried following it but it doesn't mention how to use authentication and I am getting the following error in response -
{
"error": {
"code": "AuthenticationFailed",
"message": "Authentication failed. The 'Authorization' header is missing."
}
Can someone please guide me how do use the authentication header?
As per joy said in comment, just go to the website, and click "try it" -> log use your credential, then you can see the token:
On the page you linked to, scroll all the way up in the menu and find 'Getting started with REST'. When you click that and scroll the page, you find Register your client application with Azure AD.
Most Azure services (such as Azure Resource Manager providers and the classic deployment model) require your client code to authenticate with valid credentials before you can call the service's API. Authentication is coordinated between the various actors by Azure AD, and provides your client with an access token as proof of the authentication. The token is then sent to the Azure service in the HTTP Authorization header of subsequent REST API requests. The token's claims also provide information to the service, allowing it to validate the client and perform any required authorization.
Long story short:
Register your client application with Azure AD
Create the request
Acquire an access token
Assemble the request message
Send the request
Process the response message
You need authorization header to be added in your request to purge the azure application insights data. Refer for more details and step by step guide - https://sanganakauthority.blogspot.com/2019/06/how-to-delete-or-purge-azure.html