• Drops support for PHP runtimes < 8.1 to align with SDK runtime support

• Adds the nullable type to $certClient to fix 8.4 deprecation notices

• Deprecates PHP versions < 7.2.5

• Adds support for message signature based on SHA256 hashing.

• Adds ReturnTypeWillChange attributes to prevent deprecation notices in PHP 8.1+

• Mute warning when file_get_contents() fails
• Make Message::fromJsonString() public
• Update README

• Splits up missing and invalid certificate errors for better granularity.

• Properly handle truthy value response, -1, from openssl_verify.

• Correctly handle the creation and validation of Lambda formatted Aws\Sns\Message objects.

• Adds support for creating an instance of Aws\Sns\Message from a PSR-7 Request or ServerRequest.

This library now allows overriding of the host pattern used to verify that SNS signing certs are hosted on a trusted domain. The default pattern remains /^sns\.[a-zA-Z0-9\-]{3,}\.amazonaws\.com(\.cn)?$/, but it can be set to any pattern for testing.

Amazon SNS Message Validator

The Amazon SNS Message Validator for PHP library allows you to validate that incoming HTTP(S) POST messages are valid Amazon SNS notifications. This library is standalone and does not depend on the AWS SDK for PHP or Guzzle; however, it does require PHP 5.4+ and that the OpenSSL PHP extension is installed.

Initial pre-release of the Amazon SNS Message Validator for PHP.

The code for this package was extracted from Version 2 of the AWS SDK for PHP, and then refactored to remove dependencies on the SDK and Guzzle. This library requires PHP 5.4+ and OpenSSL.