Скачать или смотреть How to Verify JWT Access Token from Azure AD in Ruby

Discover how to properly verify a `JWT Access Token` from Azure Active Directory in Ruby. This blog breaks down common issues and provides a clear solution.
---
This video is based on the question https://stackoverflow.com/q/71058949/ asked by the user 'Romuloux' ( https://stackoverflow.com/u/1580021/ ) and on the answer https://stackoverflow.com/a/73859779/ provided by the user 'Romuloux' ( https://stackoverflow.com/u/1580021/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: How to verify JWT Access Token from Azure AD in Ruby

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
How to Verify JWT Access Token from Azure AD in Ruby: A Comprehensive Guide

Verifying a JWT access token from Azure Active Directory (AD) can often lead to confusion, especially if you're transitioning from other authentication systems like Auth0. If you're facing the dreaded "JWT::VerificationError (Signature verification raised)" error, don't worry! You're not alone. In this guide, we will take an in-depth look into the verification process of JWT tokens in Ruby, identify common pitfalls, and provide clear solutions.

Understanding the Problem

When working with Azure AD and JWTs, the process can sometimes feel less straightforward than with other services. One common issue you may encounter is the inability to validate JWT access tokens. This usually stems from the misunderstanding of how Azure AD handles access and ID tokens. It’s crucial to clarify that:

Access Tokens: These are intended to authenticate API requests to Microsoft's services and are signed by Microsoft. They cannot be used for validating authentication against your custom API.

ID Tokens: These are signed by your application and can be validated for your own API authentication.

Now, let's look at how to correctly verify a JWT access token using Ruby.

Step-by-Step Solution

1. Required Libraries

You’ll need a few Ruby libraries to accomplish token verification. Make sure to have the following in your environment:

[[See Video to Reveal this Text or Code Snippet]]

2. Fetching the JSON Web Key Set (JWKS)

You need to fetch the public key(s) used to verify the tokens. This is done via the Azure AD endpoint:

[[See Video to Reveal this Text or Code Snippet]]

3. Process the JWKS

Once you have the raw JWKS, convert it into a hash mapping the key ID (kid) to the public key:

[[See Video to Reveal this Text or Code Snippet]]

4. Decoding and Validating the JWT

You can now decode the access token using the retrieved public key. Start by decoding the access token without verification to obtain the token's header, specifically the kid:

[[See Video to Reveal this Text or Code Snippet]]

Next, retrieve the appropriate public key from your jwks_hash using the kid:

[[See Video to Reveal this Text or Code Snippet]]

Finally, verify the access token:

[[See Video to Reveal this Text or Code Snippet]]

Common Errors and Misunderstandings

Signature verification error: This is commonly due to trying to validate access tokens for your API rather than using ID tokens. Ensure you use ID tokens for your application.

JWKS Not Retrieved: If the JWKS endpoint fails, ensure that you have the correct Azure AD tenant ID and that your application is properly configured in the Azure portal.

Conclusion

By understanding the differences between access and ID tokens and following the above steps, you can successfully verify JWT access tokens from Azure AD in Ruby. Should you still encounter issues, double-check your setup and ensure that you are using IDs appropriately within your application context.

Always feel free to refer back to official Azure documentation for any updates or additional details regarding token validation, especially as authentication practices continually evolve.

If you found this guide helpful, please share your thoughts, questions, or experiences in the comments below!