Version 1.9.1

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

Version 1.9.0

• Deprecates PHP versions < 7.2.5

Version 1.8.0

• Adds support for message signature based on SHA256 hashing.

Version 1.7.0

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

Version 1.6.0

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

Version 1.5.0

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

Version 1.4.0

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

Version 1.3.0

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

Version 1.2.0

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

Version 1.1.0

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.