amazon-s3 - 限制对 S3 存储桶中单个文件夹的访问

Question

我想限制对 S3 存储桶中单个文件夹的访问。

我为此编写了一个 IAM 角色。不知何故，我没有将文件上传/同步到此文件夹。在这里，bucket 是存储桶名称，文件夹是我要授予访问权限的文件夹。

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "AllowUserToSeeBucketListInTheConsole",
            "Action": [
                "s3:ListAllMyBuckets",
                "s3:GetBucketLocation"
            ],
            "Effect": "Allow",
            "Resource": [
                "arn:aws:s3:::*"
            ]
        },
        {
            "Sid": "AllowRootAndHomeListingOfBucket",
            "Action": [
                "s3:ListBucket"
            ],
            "Effect": "Allow",
            "Resource": [
                "arn:aws:s3:::bucket"
            ],
            "Condition": {
                "StringEquals": {
                    "s3:prefix": [
                        ""
                    ],
                    "s3:delimiter": [
                        "/"
                    ]
                }
            }
        },
        {
            "Sid": "AllowListingOfUserFolder",
            "Action": [
                "s3:ListBucket",
                "s3:PutObject",
                "s3:PutObjectAcl",
                "s3:GetObject",
                "s3:GetObjectAcl",
                "s3:HeadObject"
            ],
            "Effect": "Allow",
            "Resource": [
                "arn:aws:s3:::bucket"
            ],
            "Condition": {
                "StringLike": {
                    "s3:prefix": [
                        "folder/*"
                    ]
                }
            }
        }
    ]
}

请建议我错在哪里。

Answer 1

此限制性 IAM 策略仅授予对特定存储桶中特定前缀的列表和上传访问权限。它还打算允许分段上传。

引用:

https://docs.aws.amazon.com/AmazonS3/latest/API/API_Operations.html

https://docs.aws.amazon.com/AmazonS3/latest/dev/mpuAndPermissions.html

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "ListBucket",
            "Effect": "Allow",
            "Action": "s3:ListBucket",
            "Resource": "arn:aws:s3:::mybucket",
            "Condition": {
                "StringLike": {
                    "s3:prefix": "my/prefix/is/this/*"
                }
            }
        },
        {
            "Sid": "UploadObject",
            "Effect": "Allow",
            "Action": [
                "s3:PutObject",
                "s3:AbortMultipartUpload",
                "s3:ListMultipartUploadParts"
            ],
            "Resource": [
                "arn:aws:s3:::mybucket/my/prefix/is/this/*",
            ]
        }
    ]
}

请注意，指定 s3:ListBucket资源紧凑为 "arn:aws:s3:::mybucket/my/prefix/is/this/*"没有用。