Amazon’s SES Signature Version 4 Starting Contest

1 · Alan Storm · May 30, 2021, 12:41 p.m.
Over the past year Amazon’s been sending me a series of escalating emails warning me that it’s shutting off my SES access unless I something something V4 authentication signature. Sometime in April they followed through and stopped letting me use the API. It was time to dissect an old legacy app and figure out what, if anything, I was going to do about this. This application was built in the days before the AWS PHP SDK — I found a file named ses.php with a few classes in it, and its doc blocks p...