How to check whether s3 access key has access to a specific bucket or not in aws using boto3

Question

I am trying to copy files from 2 different bucket which are in two different aws account using same access key. So it provide an error saying 403 forbidden.So what i want to do is, I want to check whether the access key that i am using to copy the file has permission to those bucket before i copy the file using boto3. Is there are anyway to do this?

Answer 1

If you are copying objects between Amazon S3 buckets that belong to different AWS accounts, then you will need to use a single set of credentials that have:

• GetObject permission on the source bucket
• PutObject permission on the destination bucket

Also, the CopyObject command should be sent to the destination bucket to avoid problems with object ownership.

Therefore, I would recommend:

• Use credentials from the destination account ( dest-IAM-user )
• Add a bucket policy to the source bucket that permits GetObject access by dest-IAM-user