IAM policy to grant a user narrow access to one S3 bucket

iam-policy.json

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Effect": "Allow",
            "Action": [
                "s3:ListBucket",
                "s3:ListAllMyBuckets",
                "s3:GetBucketLocation"
            ],
            "Resource": [
                "arn:aws:s3:::bucket-name"
            ]
        },
        {
            "Effect": "Allow",
            "Action": [
                "s3:PutObject",
                "s3:GetObject",
                "s3:DeleteObject"
            ],
            "Resource": [
                "arn:aws:s3:::bucket-name/*"
            ]
        }
    ]
}

As of 2018-07-16, the policy summary will complain about having "s3:ListAllMyBuckets" when the resource does not have an '*'. I deleted it from the JSON policy to satisfy the summary.

I was trying this policy but getting a "Missing required field Principal" error.

I was trying this policy but getting a "Missing required field Principal" error.

Check this out: https://gist.github.com/sr9yar/a05e278a6dddbaa66da004bbe021b2b4
Worked for me.