Allowing read and write access to an Amazon S3 bucket

This section describes how to create an IAM policy that allows read and write access to a specific Amazon S3 bucket. Assigning an IAM role that has this IAM policy to your user gives that user read/write access to the specified Amazon S3 bucket.

The following policy provides programmatic read, write, and tagging access to an Amazon S3 bucket. The GetObjectACL and PutObjectACL statements are only required if you need to enable Cross Account Access. That is, your Transfer Family server needs to access a bucket in a different account.

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Sid":"ReadWriteS3",
      "Action": [
            "s3:ListBucket"
                ],
      "Effect": "Allow",
      "Resource": ["arn:aws:s3:::amzn-s3-demo-bucket"]
    },
    {
      "Effect": "Allow",
      "Action": [
        "s3:PutObject",
        "s3:GetObject",
        "s3:GetObjectTagging",
        "s3:DeleteObject",              
        "s3:DeleteObjectVersion",
        "s3:GetObjectVersion",
        "s3:GetObjectVersionTagging",
        "s3:GetObjectACL",
        "s3:PutObjectACL"
      ],
      "Resource": ["arn:aws:s3:::amzn-s3-demo-bucket/*"]
    }
  ]
}    

The ListBucket action requires permission to the bucket itself. The PUT, GET, and DELETE actions require object permissions. Because these are different resources, they are specified using different Amazon Resource Names (ARNs).

To further restrict your users' access to only the home prefix of the specified Amazon S3 bucket, see Creating a session policy for an Amazon S3 bucket.