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Dell ObjectScale 1.3 Administration Guide

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Authenticating with the S3 service

The ObjectScale S3 service enables authentication using Signature Version 4. This topic identifies any ObjectScale-specific aspects of the authentication process.

Amazon S3 uses an authorization header that must be present in all requests to identify the user and provide a signature for the request.

In order to create an authorization header, you need an AWS Access Key Id and a Secret Access Key. In ObjectScale, the AWS Access Key Id is shown in the table located at Account > <USER_NAME> > Secret Key for each user. The Access Key ID is listed in the table.

The following notes apply:

  • When users add or change the secret key, they should wait two minutes for ObjectScale to refresh with the new secret key before using the new secret key.

Authenticating using Signature V4

The Authorization header when using Signature V4 looks like this: 

Authorization: AWS4-HMAC-SHA256 
Credential=OKIA60819103813C1F40/20130524/us/s3/aws4_request, 
SignedHeaders=host;range;x-amz-date,
Signature=fe5f80f77d5fa3beca038a248ff027d0445342fe2855ddc963176630326f1024

The Credential component comprises your Access Key Id followed by the Credential Scope. The Credential Scope comprises Date/Region/Service Name/Termination String. For ObjectScale, the Service Name is always s3 and the Region can be any string. When computing the signature, ObjectScale uses the Region string passed by the client.

Authentication using Signature V4 is described in:

An example of a PUT replication request using Signature V4 is provided below: 

PUT https://<objectscale>/testbucket?replication
Authorization: AWS4-HMAC-SHA256 Credential=OKIA60819103813C1F40/20160726/us/s3/aws4_request,SignedHeaders=host;x-amz-content-sha256;x-amz-date, Signature=e75a150daa28a2b2f7ca24f6fd0e161cb58648a25121d3108f0af5c9451b09ce
Content-MD5: x0ns_8TT8w5fB2woe72A==
Host: 10.247.195.130:9021
x-amz-content-sha256: e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
x-amz-date: 20160726T033659Z

Response: 

200 OK
Date: Tue, 26 Jan 2022 03:37:00 GMT
Server: ViPR/1.0
x-amz-request-id: 0af7c382:156123ab861:4192:896
x-amz-id-2: 3e2b2280876d444d6c7215091692fb43b87d6ad95b970f48911d635729a8f7ff

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