AWS S3 Authentication plugin

This is a plugin for Apache Traffic Server that provides support for the Amazon S3 authentication features. This is useful if you for example want to use S3 as your origin server, yet want to avoid direct user access to the content.

Using the plugin

There are three configuration options for this plugin:

--access_key    <key>
--secret_key    <key>
--virtual_host
--config        <config file>

Using the first two in a remap rule would be e.g.:

...  @plugin=s3_auth @pparam=--access_key @pparam=my-key \
                     @pparam=--secret_key @pparam=my-secret \
                     @pparam=--virtual_host

Alternatively, you can store the access key and secret in an external configuration file, and point the remap rule(s) to it:

... @plugin=s3_auth @pparam=–config @pparam=s3.config

Where s3.config would look like:

# AWS S3 authentication
    access_key=my-key
    secret_key=my-secret
    virtual_host=yes

For more details on the S3 auth, see:

http://docs.aws.amazon.com/AmazonS3/latest/dev/RESTAuthentication.html

ToDo

This is a pretty barebone start for the S3 services, it is missing a number of features:

• It does not do UTF8 encoding (as required)

• It only implements the v2 authentication mechanism. For details on v4, see

  http://docs.aws.amazon.com/AmazonS3/latest/API/sig-v4-authenticating-requests.html

• It does not deal with canonicalization of AMZ headers.

• It does not handle POST requests (but do we need to ?)

• It does not incorporate query parameters.

Contributions to any of these would be appreciated.