Need a Python library for generating WSSE headers for API calls

Our API requires WSSE headers to communicate with the server. We presently have generators written in Java, PHP, C# and JavaScript. All produce the same output. We now want to add Python to the list. What we want out of this project: 1- A code library that customers can integrate into their own projects 2- Unit tests to confirm the code is working as expected 3- Documentation explaining how the code works The following information is needed to generate a WSSE header: 1- The name of the customer as it appears in the software; 2- A nonce, which is a random string generated by you. This string must be different with each request; The current date & time in UTC-0. See [login to view URL] for more information; 3- Username – Your username; 4- API token – A unique token assigned to you by us. The following PHP script demonstrates how to generate a WSSE header. This code can be easily tested using PhpFiddle ([login to view URL]). === PHP EXAMPLE === <?php $orgName = "YOUR_ORGANZATION"; $username = "YOUR_USERNAME"; $token = "YOUR_TOKEN"; $key = md5($username); $cryptAlgo = 'AES-256-CFB'; $iv = mb_substr(base64_decode($token), 0, 16, '8bit'); $secret = base64_encode($iv.openssl_encrypt($token, $cryptAlgo, $key, 0, $iv)); date_default_timezone_set('UTC'); $current_time = date('c'); $nonce = md5(rand(), true); $base64_nonce = base64_encode($nonce); $password_digest = base64_encode(sha1($nonce . $current_time . $secret, true)); $header = "UsernameToken Username=\"$username\",". "PasswordDigest=\"$password_digest\",". "Nonce=\"$base64_nonce\",". "Created=\"$current_time\",". "Organization=\"$orgName\""; echo $header; ?> === PHP EXAMPLE : END === The following Javascript script demonstrates how to generate a WSSE header. This code can be easily tested using Postman ([login to view URL]). === JAVASCRIPT SAMPLE === var moment = require('moment'); var username = "YOUR_USERNAME", orgName = "YOUR_ORGANZATION", token = "YOUR_TOKEN", key = [login to view URL](username).toString(), iv = atob(token).substring(0, 16).toString([login to view URL]), encrypted, secret, created, nonce, base64Nonce, passwordDigest, utf8iv = [login to view URL](iv), utf8key = [login to view URL](key), utf8token = [login to view URL](token); encrypted = [login to view URL](utf8token, utf8key, { iv: utf8iv, mode: [login to view URL], padding: [login to view URL] }); secret = btoa(iv + encrypted); created = moment().utc().format(); created = [login to view URL](0, [login to view URL] - 1) + '+00:00'; nonce = [login to view URL]() * 32767 + '0'; nonce = [login to view URL](nonce).toString(); var stringToSha1 = nonce + created + secret; var sha1Temp = [login to view URL](stringToSha1, { asBytes: true }); base64Nonce = btoa(nonce); passwordDigest = [login to view URL](sha1Temp); header = `UsernameToken Username="${username}",PasswordDigest="${passwordDigest}", Nonce="${base64Nonce}", Created="${created}", Organization="${orgName}"`; === JAVASCRIPT SAMPLE : END ===