Convert AWS IAM credentials to SMTP credentials

awsConvertSmtpCredentials.php

<?php

if (!isset($argv[1])) {
    echo 'You must key as command\'s parameter' . PHP_EOL;
    die(1);
}

// by https://docs.aws.amazon.com/ses/latest/DeveloperGuide/smtp-credentials.html
$awsSecretAccessKey = $argv[1];
$version = "\x02";
$hash = hash_hmac('sha256', 'SendRawEmail', $awsSecretAccessKey, true);
$smtpPassword = base64_encode($version . $hash);
echo $smtpPassword . PHP_EOL;