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(AccessDeniedException) when calling the GetParameter operation: The ciphertext refers to a buyer grasp key that doesn’t exist, doesn’t exist on this area, or you aren’t allowed to entry. (Service: AWSKMS) | by Teri Radichel | Bugs That Chew | Jun, 2022


Attempting to entry a parameter from a Packer template I received this error:

An error occurred (AccessDeniedException) when calling the GetParameter operation: The ciphertext refers to a buyer grasp key that doesn't exist, doesn't exist on this area, or you aren't allowed to entry. (Service: AWSKMS; Standing Code: 400; Error Code: AccessDeniedException; Proxy: null)

The ciphertext? That appears a bit overly difficult. Additionally I form of doubt that is correct however I don’t work at AWS or know what’s within the code precisely. It doesn’t sound correct.

Repair: An easier and presumably extra correct error message:The present identification isn't can not entry the KMS Key related to the SSM parameter you’re making an attempt to entry.

Write separate error messages for various errors for various errors to make it simpler for individuals utilizing your software program to troubleshoot extra shortly.

Repair: There are three potential errors. determine which one it's and write a separate error message for every. Inform me what the precise downside is.- The important thing doesn't exist on this area
- You can't entry this key because of the key useful resource coverage.
- You don't have permission to entry this key because of IAM coverage restrictions.

Verify Key Utilized by Parameter Exists in Appropriate Area

In my case at present, I do know the important thing used to encrypt this parameter exists on this area. You could find the important thing related to a parameter within the console by trying on the Historical past tab.

The historical past tab? Why is that this simply not listed on the overview tab? Or why is not this tab named "Encryption Keys" or one thing extra applicable?

Get the KMS key ID and ensure it exists in KMS within the present area. It might additionally reference a key in one other account which you’ll inform by the account quantity within the Key ID (ARN). In that case you’ll must look within the present area within the different account.

Verify the Key Useful resource Coverage

I run sts get-caller-identity in my script so I do know precisely which identification (IAM function or person) is making an attempt to entry the parameter.

Verify the useful resource coverage related to the KMS key and ensure the person has entry to the important thing.

IAM Function Coverage

So the final choice is to verify the IAM Function and see if it has permission to make use of the KMS service. I went to have a look at the IAM coverage for the person I’m utilizing to execute a command to get an encrypted parameter and this was the issue in my case. I wanted to grant the person to entry KMS and I restricted entry to the precise key required for this parameter.

If this helped you otherwise you had this downside, please clap!

Teri Radichel — Comply with me @teriradichel on Twitter

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