如何将联合用户的权限授权给s3存储桶?

时间:2013-11-11 11:34:13

标签: amazon-web-services amazon-s3 boto

尝试从文档中搞清楚但无法创建可以访问s3存储桶的联合用户

首先是进口

>>> from boto.s3.connection import S3Connection
>>> from boto.sts import STSConnection

然后在s3中创建一个存储桶

>>> s3c = ('access key', 'secret key')  
>>> s3c.create_bucket('ranjith_new_bucket')

然后创建一个联合用户,如果我正确理解,这是一种创建临时凭证的方法

>>> sts = STSConnection('access key', 'secret key')  
>>> user = sts.get_federation_token('guest_user_1')

但是当我尝试获取所有可访问存储桶的列表时,我收到错误。

>>> s3c2 = S3Connection(user.credentials.access_key, user.credentials.secret_key)
>>> s3c2.get_all_buckets()

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/ranjith/work/venv/local/lib/python2.7/site-packages/boto-2.16.0-py2.7.egg/boto/s3/connection.py", line 387, in get_all_buckets
    response.status, response.reason, body)
boto.exception.S3ResponseError: S3ResponseError: 403 Forbidden
<?xml version="1.0" encoding="UTF-8"?>
<Error><Code>InvalidAccessKeyId</Code><Message>The AWS Access Key Id you provided does not exist in our records.</Message><RequestId>154CDA2184E00650</RequestId><HostId>xxx</HostId><AWSAccessKeyId>xxx</AWSAccessKeyId></Error>

The documentation说我必须提供一个策略字符串,但文档很难消化。我知道我必须在某处定义策略并在创建联合用户时使用它,但不确定在何处或如何做到这一点。

我试过这个:

permission = {
  "Version": "2012-10-17",
  "Statement": [
    {
       "Effect": "Allow",
       "Action": ["sts:GetFederationToken"],
       "Resource": "*"
     },
    {
       "Effect": "Allow",
       "Action": ["s3:*"],
       "Resource": "arn:aws:s3:::mybucket/ranjith_new_bucket/*"
     }
   ]
 }

sts.get_federation_token('some_other_user', json.dumps(permission))

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/ranjith/work/venv/local/lib/python2.7/site-packages/boto-2.16.0-py2.7.egg/boto/sts/connection.py", line 235, in get_federation_token
    FederationToken, verb='POST')
  File "/home/ranjith/work/venv/local/lib/python2.7/site-packages/boto-2.16.0-py2.7.egg/boto/connection.py", line 1138, in get_object
    raise self.ResponseError(response.status, response.reason, body)
boto.exception.BotoServerError: BotoServerError: 400 Bad Request
<ErrorResponse xmlns="https://sts.amazonaws.com/doc/2011-06-15/">
  <Error>
    <Type>Sender</Type>
    <Code>MalformedInput</Code>
  </Error>
  <RequestId>75734932-4ac1-11e3-a17b-e9e245983c07</RequestId>
</ErrorResponse>

这真的很愚蠢,因为我所做的只是放入政策的json转储。我甚至无法找到任何在线资源来解决这个问题。

如果有人可以指导我,那么我最终会创建一个可以访问上面创建的ranjith_new_bucket的联盟用户。代码片段将不胜感激。

1 个答案:

答案 0 :(得分:4)

此调用返回的FederationToken对象:

>>> user = sts.get_federation_token('guest_user_1')

有一个名为credentials的属性,此子对象包含access_keysecret_keysession_token。所有这三个都需要在请求中发送。您目前只发送access_keysecret_key。我想如果你改变你的代码看起来像这样:

> s3c2 = S3Connection(user.credentials.access_key, user.credentials.secret_key, security_token=user.credentials.session_token)

你应该没事。