authentication - S3 API to access Cloud Storage using Service Account with Java

Question

I want to access my GCP Cloud Storage bucket using the Java AWS S3 API for interoperability, so don't want to use Google APIs in my code. I have seen examples of Basic Authentication using the S3 API when accessing Google Cloud Storage. I want to authenticate via my service account json key ( OAuth 2 ) instead of creating another HMAC key for Cloud Storage. Can anyone point me to a example using Java please. What is the recommended approach - I thought the json oauth 2 authentication is a good one.

Basic authentication goes like this:

                // Create a BasicAWSCredentials using Cloud Storage HMAC credentials.
                BasicAWSCredentials googleCreds =
                    new BasicAWSCredentials(googleAccessKeyId, googleAccessKeySecret);

                // Create a new client and do the following:
                // 1. Change the endpoint URL to use the Google Cloud Storage XML API endpoint.
                // 2. Use Cloud Storage HMAC Credentials.
                AmazonS3 interopClient =
                    AmazonS3ClientBuilder.standard()
                        .withEndpointConfiguration(
                                new AwsClientBuilder.EndpointConfiguration("https://storage.googleapis.com", "auto"))
                        .withCredentials(new AWSStaticCredentialsProvider(googleCreds))
                        .build();

but I want to authenticate with the json key generated for the service account. The service account has access to Cloud Storage Viewer and Cloud Storage Creator.

Thanks

question from:https://stackoverflow.com/questions/65902663/s3-api-to-access-cloud-storage-using-service-account-with-java

Answer 1

Waitting for answers