Python script to derive AWS SES SMTP passwords from IAM access secret keys using HMAC, SHA256 and Base64 per http://docs.aws.amazon.com/ses/latest/DeveloperGuide/smtp-credentials.html

DeriveSesSmtpPassword.py

import base64
import hmac
import hashlib

secret = "_____" # replace with the secret key to be hashed

message = "SendRawEmail"
sig_bytes = bytearray(b'\x02')  # init with version

theHmac = hmac.new(secret.encode("ASCII"), message.encode("ASCII"), hashlib.sha256)
the_hmac_hexdigest = theHmac.hexdigest()
sig_bytes.extend(bytearray.fromhex(the_hmac_hexdigest))
print(base64.b64encode(sig_bytes))