拒绝 AWS S3 中的匿名下载

Question

我有一个包含多个可公开下载的文件的存储桶。我想制定一个存储桶策略，之后这些文件只能由我的 IAM 用户下载。到目前为止我得到的政策是这样的：

{
    "Version": "2008-10-17",
    "Id": "Policy1424952346041",
    "Statement": [
        {
            "Sid": "Stmt1424958477350",
            "Effect": "Deny",
            "NotPrincipal": {
                "AWS": "arn:aws:iam::777777777777:root"
            },
            "Action": "s3:*",
            "Resource": "arn:aws:s3:::test/*"
        },
        {
            "Sid": "Stmt1424958477351",
            "Effect": "Allow",
            "Principal": {
                "AWS": "arn:aws:iam::777777777777:root"
            },
            "Action": "s3:*",
            "Resource": "arn:aws:s3:::test/*"
        }
    ]
}

但是，它拒绝了包括 IAM 用户在内的所有人。任何人都可以指出这里有什么问题吗？

Answer 1

根据您在账户中拥有的 IAM 用户数量，您可以在两个语句中指定账户，如下所示（尝试一两个只是作为测试，看看它是否有效）。我过去在获取 arn:aws:iam::XXXXXXXXXXXX:root 以实际覆盖所有 IAM 账户时遇到过问题。您还可以尝试仅指定 IAM 用户并删除根条目。

{
    "Version": "2008-10-17",
    "Id": "Policy1424952346041",
    "Statement": [
        {
            "Sid": "Stmt1424958477350",
            "Effect": "Deny",
            "NotPrincipal": {
                "AWS": [
                        "arn:aws:iam::777777777777:root",
                        "arn:aws:iam::777777777777:user/user1", 
                        "arn:aws:iam::777777777777:user/user2" ]
            },
            "Action": "s3:*",
            "Resource": "arn:aws:s3:::test/*"
        },
        {
            "Sid": "Stmt1424958477351",
            "Effect": "Allow",
            "Principal": {
                "AWS": [
                        "arn:aws:iam::777777777777:root",
                        "arn:aws:iam::777777777777:user/user1",
                        "arn:aws:iam::777777777777:user/user2" ]
            },
            "Action": "s3:*",
            "Resource": "arn:aws:s3:::test/*"
        }
    ]
}