Come usi Boto3 download_file con AWS KMS?

Question

Ho uno script molto semplice che scarica un file da un bucket. Il file utilizza le chiavi crittografate KMS, i miei criteri e i miei ruoli sono impostati correttamente, ma ricevo comunque un errore.

Codice

#!/usr/bin/env python 
import boto3 
s3_client = boto3.client('s3') 
s3_client.download_file('testtesttest', 'test.txt', '/tmp/test.txt') 

errore

Traceback (most recent call last): 
    File "./getfile.py", line 4, in <module> 
s3_client.download_file('testtesttest', 'test.txt', '/tmp/test.txt') 
File "/usr/local/lib/python2.7/dist-packages/boto3/s3/inject.py", line 91, in download_file 
extra_args=ExtraArgs, callback=Callback) 
File "/usr/local/lib/python2.7/dist-packages/boto3/s3/transfer.py", line 659, in download_file 
extra_args, callback) 
File "/usr/local/lib/python2.7/dist-packages/boto3/s3/transfer.py", line 674, in _download_file 
self._get_object(bucket, key, filename, extra_args, callback) 
File "/usr/local/lib/python2.7/dist-packages/boto3/s3/transfer.py", line 698, in _get_object 
extra_args, callback) 
File "/usr/local/lib/python2.7/dist-packages/boto3/s3/transfer.py", line 712, in _do_get_object 
**extra_args) 
File "/usr/local/lib/python2.7/dist-packages/botocore/client.py", line 301, in _api_call 
return self._make_api_call(operation_name, kwargs) 
File "/usr/local/lib/python2.7/dist-packages/botocore/client.py", line 386, in _make_api_call 
raise ClientError(parsed_response, operation_name) 
botocore.exceptions.ClientError: An error occurred (InvalidArgument) when calling the GetObject operation: Requests specifying Server Side Encryption with AWS KMS managed keys require AWS Signature Version 4. 

Answer 1

capito

Codice

#!/usr/bin/env python 
import boto3 
from botocore.client import Config 
s3_client = boto3.client('s3', config=Config(signature_version='s3v4')) 
s3_client.download_file('testtesttest', 'test.txt', '/tmp/test.txt') 

Answer 2

Si consiglia inoltre di sapere come caricare un file su s3 utilizzando le chiavi kms.

s3_client = boto3.client('s3', config=Config(signature_version='s3v4')) 
s3_client.upload_file(filename, bucketname, objectkey, ExtraArgs={"ServerSideEncryption": "aws:kms", "SSEKMSKeyId": <somekmskeyid>}) 

Se non si forniscono i km chiave id - per impostazione predefinita utilizza la chiave master km s3.