S3存储桶策略以允许访问特定用户并限制所有 [英] S3 Bucket Policy to Allow access to specific users and restrict all

问题描述

我搜索了现有问题，但找不到答案.因此在这里发布.

I searched through existing questions and couldnt find an answer. Hence posting here.

我想将对S3存储桶的访问限制为所有用户，但使用S3存储桶策略选择少数用户除外.我知道IAM策略易于管理，我不喜欢为此特定情况创建角色和组，而希望创建S3存储桶策略.

I want to restrict access to a S3 bucket to all users except select few users using S3 Bucket policy. I understand IAM policy is easy to manage and administer, i dont like to create roles and groups for this specific case and want S3 bucket policy created.

这是我到目前为止已经尝试过的方法，它并没有像预期的那样限制对用户的访问.

Here is what i have tried so far and it is not restricting access to users as expected.

{
  "Version": "2012-10-17",
  "Id": "bucketPolicy",
  "Statement": [
    {

      "Effect": "Allow",
      "Principal": {
        "AWS": ["arn:aws:iam::1234567890:user/allowedusername"]
      },
      "Action": "s3:*",
      "Resource": ["arn:aws:s3:::examplebucket",
                   "arn:aws:s3:::examplebucket/*"]
    },
    {

      "Effect": "Deny",
      "Principal": {
        "AWS": ["arn:aws:iam::1234567890:user/denieduser"]
      },
      "Action": "s3:*",
      "Resource": ["arn:aws:s3:::examplebucket",
                   "arn:aws:s3:::examplebucket/*"]
    }

  ]
}

我试图否认所有类似下面的内容，但是该明确的拒绝优先于allow，我本人现在无法访问存储桶；-(那是我遇到的另一个问题

I tried to deny all like below but that explicit deny took precedence over allow and i myself am not able to access the bucket now ;-( Thats another issue i have

{

          "Effect": "Deny",
          "Principal": {
            "AWS": ["*"]
          },
          "Action": "s3:*",
          "Resource": ["arn:aws:s3:::examplebucket",
                       "arn:aws:s3:::examplebucket/*"]
        }

推荐答案

要实现所需的功能，请使用带有"NotPrincipal"策略元素的显式拒绝.以下策略将确保"NotPrincipal"元素中列出的用户以外的其他用户无法访问存储桶.

To achieve what you want, use an explicit deny with a "NotPrincipal" policy element. The policy below will ensure no other user can access the buckets other than the users listed in the "NotPrincipal" element.

    {
            "Id": "bucketPolicy",
            "Statement": [
                    {
                            "Action": "s3:*",
                            "Effect": "Deny",
                            "NotPrincipal": {
                                    "AWS": [
                                            "arn:aws:iam::1234567890:user/alloweduser"
                                    ]
                            },
                            "Resource": [
                                    "arn:aws:s3:::examplebucket",
                                    "arn:aws:s3:::examplebucket/*"
                            ]
                    }
            ],
            "Version": "2012-10-17"
    }

这篇关于S3存储桶策略以允许访问特定用户并限制所有的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！