创建允许访问 Cloudfront 但限制其他任何人访问的 S3 存储桶策略

Question

我有以下政策：

{
        "Version": "2008-10-17",
        "Id": "PolicyForCloudFrontPrivateContent",
        "Statement": [
            {
                "Sid": "Stmt1395852960432",
                "Action": "s3:*",
                "Effect": "Deny",
                "Resource": "arn:aws:s3:::my-bucket/*",
                "Principal": {
                    "AWS": [
                        "*"
                    ]
                }
            },
            {
                "Sid": "1",
                "Effect": "Allow",
                "Principal": {
                    "AWS": "arn:aws:iam::cloudfront:user/CloudFront Origin Access Identity E1IYJC432545JN"
                },
                "Action": "s3:GetObject",
                "Resource": "arn:aws:s3:::my-bucket/*"
            }
        ]
    }

但是，这会拒绝所有请求者的请求，包括 Cloudfront。这样做的正确方法是什么？

问题是对象是由具有公共读取的客户端创建的。我目前无法立即控制客户端来更改此设置。所以我想要的是有一个覆盖单个对象 ACL 的策略。所以这里的默认拒绝是行不通的。

Answer 1

S3 策略如下所示：

{
"Version": "2008-10-17",
"Id": "PolicyForCloudFrontPrivateContent",
"Statement": [
    {
        "Sid": "1",
        "Effect": "Allow",
        "Principal": {
            "AWS": "arn:aws:iam::cloudfront:user/CloudFront Origin Access Identity XXXXXXXXXXX"
        },
        "Action": "s3:GetObject",
        "Resource": "arn:aws:s3:::YYYYYYYYYYYYY.com/*"
    }
 ]
}

但是，我没有手动生成这个。当您在云端添加源 (S3) 时，您可以选择“限制存储桶访问” - 在此处选择“是”并继续前进。 Cloudfront 配置会自动为您完成其余的工作。

这里有详细信息：Using an Origin Access Identity to Restrict Access to Your Amazon S3 Content - Amazon CloudFront。

Answer 2

这就是你要找的。将 XXXXXXXXXXXXXXX 替换为您的原始访问 ID

{
"Version": "2012-10-17",
"Statement": [
    {
        "Sid": "AddPerm",
        "Effect": "Deny",
        "NotPrincipal": {
            "AWS": "arn:aws:iam::cloudfront:user/CloudFront Origin Access Identity XXXXXXXXXXXXXX"
        },
        "Action": "s3:GetObject",
        "Resource": "arn:aws:s3:::your.bucket.com/*"
    },
    {
        "Sid": "2",
        "Effect": "Allow",
        "Principal": {
            "AWS": "arn:aws:iam::cloudfront:user/CloudFront Origin Access Identity XXXXXXXXXXXXXX"
        },
        "Action": "s3:GetObject",
        "Resource": "arn:aws:s3:::your.bucket.com/*"
    }
]
}