AWS malformed policy error

Question

Solved this riddle!

There has to be a file:// prefix in front of the policy file name:

aws iam put-group-policy --group-name my-group --policy-name s3-full-access --policy-document file:///tmp/policy.json

The original error message is very misleading, as you get the same message if you provide a filename that does not exist at all.

So it is not the syntax of the policy in the file but the fact that the CLI does not see the file at all, that causes the error.

I was facing the same issue on window 10 and this help me.

**file** : followed by **two Forward slash** like         :"file://"
**Path on window 10** : followed by **Backward slash** like 
:"c:\Users\Anand\Desktop\anand-jan19.json"

C:\Users\Anand>aws iam create-policy --policy-name anand-jan19 --policy-document file://c:\Users\Anand\Desktop\anand-jan19.json
{
    "Policy": {
        "PolicyName": "anand-jan19",
        "PolicyId": "EQWEQBV33ewrwYCRCS",
        "Arn": "arn:aws:iam::56433378:policy/anand-jan19",
        "Path": "/",
        "DefaultVersionId": "v1",
        "AttachmentCount": 0,
        "PermissionsBoundaryUsageCount": 0,
        "IsAttachable": true,
        "CreateDate": "2019-02-10T04:03:32Z",
        "UpdateDate": "2019-02-10T04:03:32Z"
    }
}

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ PS command: Example 1.

aws iam create-role --role-name vmimport --assume-role-policy-document file:///policy/trust-policy.json

****Actual path******: C:\policy\trust-policy.json ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

PS command: Example 2.

aws iam put-role-policy --role-name vmimport --policy-name vmimport --policy-document file:///policy/role-policy.json

****Actual path******: C:\policy\role-policy.json +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++