Get S3 object securely using Curl and Openssl with SIGV4

This script allow you to retrieve an S3 object securely using Curl and Openssl with SIGV4

Prerequisites

• An operating system with a Bash interpreter
• The curl program to send HTTP requests
• The openssl program to generate hashes and signatures
• Access to the EC2 instance metadata interface (http://169.254.169.254/latest/meta-data/)
• Valid IAM account credentials and a session token, accessible via the EC2 instance metadata interface.
• The necessary permissions to access an object in an S3 bucket, including the name of the bucket and the path to the object.

Usage

Here is how to use this script

./get-object-s3.sh bucket_name object_path

where bucket_name is the name of the S3 bucket where the object is located, and object_path is the path to the object in the bucket.

For example, if you want to access the object /documents/file.txt in the my-bucket bucket, you can use the following command:

./get-object-s3.sh my-bucket documents/file.txt

The script will use the EC2 instance credentials and session token to access the object in the S3 bucket