Example how to generate AWS SES password from AWS secret key

ses_password.go

package main

import (
	"crypto/hmac"
	"crypto/sha256"
	"encoding/base64"
	"fmt"
)

// AWS documentation: https://docs.aws.amazon.com/ses/latest/dg/smtp-credentials.html#smtp-credentials-convert

var (
	date     = "11111111"
	service  = "ses"
	message  = "SendRawEmail"
	terminal = "aws4_request"
	version  = 4

	region = "us-east-1"
	key    = "wJalrXUtnFEMI/K7MDENG/bPxRfiCYEXAMPLEKEY"
)

func main() {
	sig := sign([]byte("AWS4"+key), []byte(date))
	sig = sign(sig, []byte(region))
	sig = sign(sig, []byte(service))
	sig = sign(sig, []byte(terminal))
	sig = sign(sig, []byte(message))
	sig = append([]byte{byte(version)}, sig...)
	smtpPassword := base64.StdEncoding.EncodeToString(sig)

	fmt.Println(smtpPassword)
}

func sign(key, msg []byte) []byte {
	mac := hmac.New(sha256.New, key)
	mac.Write(msg)
	return mac.Sum(nil)
}