Authentication fails to event grid topic, even though a valid access key is used

Erdem Celik 1

We received an authentication error from one of our APIs, when publishing an event to our event grid topic.
I verified, that we are using a valid access key for authentication.

In the error logs we have this report code to help you diagnose:
17b64086-0728-438f-8f09-a095229b65da:1:7/24/2020 12:10:19 PM (UTC)

1 answer

MayankBargali-MSFT 69,931 Reputation points

2020-07-24T15:02:02.33+00:00

Hi anonymous user

I have looked into the backend logs and I can see that the requested authorization key is not authorized.
This could happen if you have copy pasted the key and special character are added to it (starting or ending of the string). You can either use command prompt and paste the key to see if there are any special character/space added to the key or you can covert in it UTF-8 format to verify it there is any special character and remove it from the string.

I will suggest you copy the keys again using "copy to clipboard" option from Event Grid Topic under the key section

Please 'Accept as answer' if it helped so that it can help others in the community looking for help on similar topics.
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Erdem Celik 1 Reputation point

2020-07-24T15:20:26.397+00:00

Hi @MayankBargali-MSFT ,

Thanks for your response.

We are referencing this configuration value from key vault. That key vault entry has created almost 6 months ago, and haven't changed since. As well as the implementation to perform this authentication.

Are you able to confirm that there is actually a different value is being passed as credential?

Putting here some other report codes I found, regarding different request failures:
* f8a6eee0-0828-4f5f-80df-903899b8834e:3:7/24/2020 12:51:56 PM (UTC)
* a7314522-b0bd-4612-9576-5a750427b45a:1:7/24/2020 12:46:10 PM (UTC)
* 1f5e68c3-0237-4214-93aa-14e5f8a4da24:3:7/24/2020 12:44:38 PM (UTC)
* 94eb76ff-bd0b-46c2-a4cc-10c39e20534e:1:7/24/2020 12:42:44 PM (UTC)

MayankBargali-MSFT 69,931 Reputation points

2020-07-27T06:15:22.12+00:00

Hi anonymous user

We don't log the exact string which is passed as the authentication and what is the current credential string as it is personal information of the customers.
We only log what was the outcome and the error message. Please verify the credential and let me know if you are still facing the issue.
I will be glad to assist you offline and have a look into your setup to resolve the issue.

Erdem Celik 1 Reputation point

2020-07-27T09:51:28.983+00:00

I verified the credential is correct. And did a local debugging, using the same access key, which was successful.
So I would be glad, if you could help me further with a more detailed investigation.

MayankBargali-MSFT 69,931 Reputation points

2020-07-27T15:23:30.163+00:00

Hi anonymous user

Thanks for your response. Please send an email with subject line “Attn:Mayank” to AzCommunity[at]Microsoft[dot]com referencing this thread along with key vault details and how you are retrieving the keys.
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Authentication fails to event grid topic, even though a valid access key is used

1 answer