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lib/AWS/SNS/Verify.pm  view on Meta::CPAN

=head1 SYNOPSIS

 my $body = request->body; # example fetch raw body from Dancer
 my $sns = AWS::SNS::Verify->new(body => $body);
 if ($sns->verify) {
     return $sns->message;
 }

=head1 DESCRIPTION

This module will parse a message from Amazon Simple Notification Service and validate its signature. This way you know the message came from AWS and not some third-party. More info here: L<http://docs.aws.amazon.com/sns/latest/dg/SendMessageToHttp.ve...

=head1 METHODS

=head2 new

Constructor.

=over

=item body

Required. JSON string posted by AWS SNS. Looks like:

 {
    "Type" : "Notification",
    "MessageId" : "a890c547-5d98-55e2-971d-8826fff56413",
    "TopicArn" : "arn:aws:sns:us-east-1:041977924901:foo",
    "Subject" : "test subject",
    "Message" : "test message",
    "Timestamp" : "2015-02-20T20:59:25.401Z",
    "SignatureVersion" : "1",
    "Signature" : "kzi3JBQz64uFAXG9ZuAwPI2gYW5tT7OF83oeHb8v0/XRPsy0keq2NHTCpQVRxCgPOJ/QUB2Yl/L29/W4hiHMo9+Ns0hrqyasgUfjq+XkVR1WDuYLtNaEA1vLnA0H9usSh3eVVlLhpYzoT4GUoGgstRVvFceW2QVF9EYUQyromlcbOVtVpKCEINAvGEEKJNGTXQQUkPUka3YMhHitgQg1WlFBmf+oweSYUEj8+Ro...
    "SigningCertURL" : "https://sns.us-east-1.amazonaws.com/SimpleNotificationService-d6d679a1d18e95c2f9ffcf11f4f9e198.pem",
    "UnsubscribeURL" : "https://sns.us-east-1.amazonaws.com/?Action=Unsubscribe&SubscriptionArn=arn:aws:sns:us-east-1:041977924901:foo:20b2d060-2a32-4506-9cb0-24b8b9e605e1",
    "MessageAttributes" : {
        "AWS.SNS.MOBILE.MPNS.Type" : {"Type":"String","Value":"token"},
        "AWS.SNS.MOBILE.WNS.Type" : {"Type":"String","Value":"wns/badge"},
        "AWS.SNS.MOBILE.MPNS.NotificationClass" : {"Type":"String","Value":"realtime"}
    }
 }

=item certificate_string

By default AWS::SNS::Verify will fetch the certificate string by issuing an HTTP GET request to C<SigningCertURL>. The SigningCertURL in the message must be a AWS SNS endpoint.

If you wish to use a cached version, then pass it in.

=item validate_signing_cert_url (default: true)

If you're using a fake SNS server in your local test environment, the SigningCertURL won't be an AWS endpoint. If so, set validate_signing_cert_url to 0.

Don't ever do this in any kind of Production environment.

=back

=head2 verify

Returns a 1 on success, or die with an L<Ouch> on a failure.

=head2 message