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Syntax errors in coverage. (Service: AmazonIdentityManagement; Standing Code: 400; Error Code: MalformedPolicyDocument; | by Teri Radichel | Bugs That Chunk | Sep, 2022


Errors associated to malformed AWS Coverage Paperwork

When creating an IAM Coverage doc you must be sure you have all of the required components and items initially.

AWS has an inventory of the weather required in a JSON coverage right here. A YAML coverage would have the identical components however utilizing YAML syntax as a substitute of JSON clearly:

You’ll want to make sure you embody any required components.

The CloudFormation documentation incorrectly lists the sort as Json when the outline proper above says it may be offered in YAML or JSON format. I suppose they’re referring to the way it exhibits up within the AWS console no matter which format you select in CloudFormation.

Sadly that documentation doesn’t embody the detailed definition of the Coverage Doc object prefer it does for different CloudFormation objects. I’ve requested for that by way of #awswishlist.

I’d written a coverage like this and was getting an error:

Though we don’t get clear specs we will check out the pattern coverage on the backside of the web page:

Of their instance they don’t have the sprint (indicating an inventory) in entrance of the Roles ingredient. I get the next which signifies that for those who do present particular values you must present an inventory for the roles ingredient:

Worth of property Roles should be of kind Listing of String

So I would like so as to add a splash earlier than the position ingredient. Hmm. I assumed I copied one other working template however let’s attempt it.

Nope, malformed. It might be actually nice if the error message might inform you extra exactly what was improper with this template wouldn’t it??

In my case I can take a look at insurance policies particular to Secrets and techniques Supervisor.

Right here I can see that the useful resource could be a checklist:

Or a single string:

Possibly you’ve already seen my typo by now however I didn’t see it instantly. I added an “s” on to “Useful resource”. So it wasn’t my position or coverage in any respect that was inflicting the issue.

Now, I’ve been writing IAM insurance policies for a couple of decade. If I can overlook this typo I’m wondering how complicated this should be to somebody who’s simply beginning out. And I’m wondering why AWS can not report on this message {that a} required part of the coverage (Useful resource) is lacking to offer the particular person writing the coverage a greater clue as to what the issue is. It looks like this might be a easy validation verify and error message so as to add, amongst others.

At any fee, this downside is solved.

Teri Radichel

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