[英]obtaining AWS credentials using cognito in python boto
I'm trying to emulate the flow of my server application creating a temporary access/secret key pair for a mobile device using my own authentication. 我正在尝试模拟我的服务器应用程序的流程,使用我自己的身份验证为移动设备创建临时访问/密钥对。 Mobile device talks to my server and end result is it gets AWS credentials.
移动设备与我的服务器通信,最终结果是它获得了AWS凭据。
I'm using Cognito with a custom developer backend, see documentation here . 我正在使用Cognito和自定义开发人员后端, 请参阅此处的文档 。
To this end, I've made the script below, but my secret/access key credentials don't work: 为此,我已经制作了下面的脚本,但我的秘密/访问密钥凭据不起作用:
import time
import traceback
from boto.cognito.identity.layer1 import CognitoIdentityConnection
from boto.sts import STSConnection
from boto.s3.connection import S3Connection
from boto.s3.key import Key
AWS_ACCESS_KEY_ID = "XXXXX"
AWS_SECRET_ACCESS_KEY = "XXXXXX"
# get token
iden_pool_id = "us-east-1:xxx-xxx-xxx-xxxx-xxxx"
role_arn = "arn:aws:iam::xxxx:role/xxxxxxx"
user_id = "xxxx"
role_session_name = "my_session_name_here"
bucket_name = 'xxxxxxxxxx'
connection = CognitoIdentityConnection(aws_access_key_id=AWS_ACCESS_KEY_ID, aws_secret_access_key=AWS_SECRET_ACCESS_KEY)
web_identity_token = connection.get_open_id_token_for_developer_identity(
identity_pool_id=iden_pool_id,
logins={"xxxxxxxxx" : user_id},
identity_id=None,
token_duration=3600)
# use token to get credentials
sts_conn = STSConnection(aws_access_key_id=AWS_ACCESS_KEY_ID, aws_secret_access_key=AWS_SECRET_ACCESS_KEY)
result = sts_conn.assume_role_with_web_identity(
role_arn,
role_session_name,
web_identity_token['Token'],
provider_id=None,
policy=None,
duration_seconds=3600)
print "The user now has an access ID (%s) and a secret access key (%s) and a session/security token (%s)!" % (
result.credentials.access_key, result.credentials.secret_key, result.credentials.session_token)
# just use any call that tests if these credentials work
from boto.ec2.connection import EC2Connection
ec2 = EC2Connection(result.credentials.access_key, result.credentials.secret_key, security_token=result.credentials.session_token)
wait = 1
cumulative_wait_time = 0
while True:
try:
print ec2.get_all_regions()
break
except Exception as e:
print e, traceback.format_exc()
time.sleep(2**wait)
cumulative_wait_time += 2**wait
print "Waited for:", cumulative_wait_time
wait += 1
My thought with the exponential backoff was that perhaps Cognito takes a while to propagate the new access/secret key pair, and thus I might have to wait (pretty unacceptable if so!). 我对指数退避的想法是,Cognito可能需要一段时间才能传播新的访问/密钥对,因此我可能不得不等待(如果是这样的话,这是非常不可接受的!)。
However, this script runs for a 10 minutes and doesn't succeed, which leads me to believe the problem is something else. 但是,这个脚本运行了10分钟但没有成功,这让我相信问题是别的。
Console print out: 控制台打印出来:
The user now has an access ID (xxxxxxxx) and a secret access key (xxxxxxxxxx) and a session/security token (XX...XX)!
EC2ResponseError: 401 Unauthorized
<?xml version="1.0" encoding="UTF-8"?>
<Response><Errors><Error><Code>AuthFailure</Code><Message>AWS was not able to validate the provided access credentials</Message></Error></Errors><RequestID>xxxxxxxxxx</RequestID></Response> Traceback (most recent call last):
File "/home/me/script.py", line 50, in <module>
print ec2.get_all_regions()
File "/home/me/.virtualenvs/venv/local/lib/python2.7/site-packages/boto/ec2/connection.py", line 3477, in get_all_regions
[('item', RegionInfo)], verb='POST')
File "/home/me/.virtualenvs/venv/local/lib/python2.7/site-packages/boto/connection.py", line 1186, in get_list
raise self.ResponseError(response.status, response.reason, body)
EC2ResponseError: EC2ResponseError: 401 Unauthorized
<?xml version="1.0" encoding="UTF-8"?>
<Response><Errors><Error><Code>AuthFailure</Code><Message>AWS was not able to validate the provided access credentials</Message></Error></Errors><RequestID>xxxxxxxxxxxxx</RequestID></Response>
Waited for: 2
...
...
Any thoughts? 有什么想法吗?
You are correctly extracting the access key and secret key from the result of the assume_role_with_web_identity call. 您正在从assume_role_with_web_identity调用的结果中正确提取访问密钥和密钥。 However, when using the temporary credentials, you also need to use the security token from the result.
但是,使用临时凭证时,还需要使用结果中的安全令牌。
Here is pseudocode describing what you need to do: http://docs.aws.amazon.com/STS/latest/UsingSTS/using-temp-creds.html#using-temp-creds-sdk 以下是描述您需要做什么的伪代码: http : //docs.aws.amazon.com/STS/latest/UsingSTS/using-temp-creds.html#using-temp-creds-sdk
Also note the security_token parameter for EC2Connection http://boto.readthedocs.org/en/latest/ref/ec2.html#boto.ec2.connection.EC2Connection 另请注意EC2Connection的security_token参数http://boto.readthedocs.org/en/latest/ref/ec2.html#boto.ec2.connection.EC2Connection
Hopefully this solves the problem 希望这能解决问题
-Mark -标记
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