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Postman WSSE Header Generation Pre-request Script (Tailored for Emarsys)
/*
* This script should be used as the pre-request script for any requests made to Emarsys. In theory, it should work for any API that implements WSSE authentication as well.
* To Use:
* 1: Set an environment variable for wsse-user and wsse-secret containing your WSSE user and secret respectively
* 2: On your Headers tab, add an X-WSSE header with a value of {{wsse-header}}
*
* That's it! When you make a request, the pre-request script will generate your Nonce, Timestamp, and Digest using your secret. The 1-time-use header will be stored in the environment as wsse-header and used for your request.
*/
//
// wsse.js - Generate WSSE authentication header in JavaScript
// (C) 2005 Victor R. Ruiz <victor*sixapart.com> - http://rvr.typepad.com/
//
// Parts:
// SHA-1 library (C) 2000-2002 Paul Johnston - BSD license
// ISO 8601 function (C) 2000 JF Walker All Rights
// Base64 function (C) aardwulf systems - Creative Commons
//
// Example call:
//
// var w = wsseHeader(Username, Password);
// alert('X-WSSE: ' + w);
//
// Changelog:
// 2005.07.21 - Release 1.0
//
/*
* A JavaScript implementation of the Secure Hash Algorithm, SHA-1, as defined
* in FIPS PUB 180-1
* Version 2.1a Copyright Paul Johnston 2000 - 2002.
* Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
* Distributed under the BSD License
* See http://pajhome.org.uk/crypt/md5 for details.
*/
/*
* Configurable variables. You may need to tweak these to be compatible with
* the server-side, but the defaults work in most cases.
*/
var hexcase = 0; /* hex output format. 0 - lowercase; 1 - uppercase */
var b64pad = "="; /* base-64 pad character. "=" for strict RFC compliance */
var chrsz = 8; /* bits per input character. 8 - ASCII; 16 - Unicode */
/*
* These are the functions you'll usually want to call
* They take string arguments and return either hex or base-64 encoded strings
*/
function hex_sha1(s){return binb2hex(core_sha1(str2binb(s),s.length * chrsz));}
function b64_sha1(s){return binb2b64(core_sha1(str2binb(s),s.length * chrsz));}
function str_sha1(s){return binb2str(core_sha1(str2binb(s),s.length * chrsz));}
function hex_hmac_sha1(key, data){ return binb2hex(core_hmac_sha1(key, data));}
function b64_hmac_sha1(key, data){ return binb2b64(core_hmac_sha1(key, data));}
function str_hmac_sha1(key, data){ return binb2str(core_hmac_sha1(key, data));}
/*
* Perform a simple self-test to see if the VM is working
*/
function sha1_vm_test()
{
return hex_sha1("abc") == "a9993e364706816aba3e25717850c26c9cd0d89d";
}
/*
* Calculate the SHA-1 of an array of big-endian words, and a bit length
*/
function core_sha1(x, len)
{
/* append padding */
x[len >> 5] |= 0x80 << (24 - len % 32);
x[((len + 64 >> 9) << 4) + 15] = len;
var w = Array(80);
var a = 1732584193;
var b = -271733879;
var c = -1732584194;
var d = 271733878;
var e = -1009589776;
for(var i = 0; i < x.length; i += 16)
{
var olda = a;
var oldb = b;
var oldc = c;
var oldd = d;
var olde = e;
for(var j = 0; j < 80; j++)
{
if(j < 16) w[j] = x[i + j];
else w[j] = rol(w[j-3] ^ w[j-8] ^ w[j-14] ^ w[j-16], 1);
var t = safe_add(safe_add(rol(a, 5), sha1_ft(j, b, c, d)),
safe_add(safe_add(e, w[j]), sha1_kt(j)));
e = d;
d = c;
c = rol(b, 30);
b = a;
a = t;
}
a = safe_add(a, olda);
b = safe_add(b, oldb);
c = safe_add(c, oldc);
d = safe_add(d, oldd);
e = safe_add(e, olde);
}
return Array(a, b, c, d, e);
}
/*
* Perform the appropriate triplet combination function for the current
* iteration
*/
function sha1_ft(t, b, c, d)
{
if(t < 20) return (b & c) | ((~b) & d);
if(t < 40) return b ^ c ^ d;
if(t < 60) return (b & c) | (b & d) | (c & d);
return b ^ c ^ d;
}
/*
* Determine the appropriate additive constant for the current iteration
*/
function sha1_kt(t)
{
return (t < 20) ? 1518500249 : (t < 40) ? 1859775393 :
(t < 60) ? -1894007588 : -899497514;
}
/*
* Calculate the HMAC-SHA1 of a key and some data
*/
function core_hmac_sha1(key, data)
{
var bkey = str2binb(key);
if(bkey.length > 16) bkey = core_sha1(bkey, key.length * chrsz);
var ipad = Array(16), opad = Array(16);
for(var i = 0; i < 16; i++)
{
ipad[i] = bkey[i] ^ 0x36363636;
opad[i] = bkey[i] ^ 0x5C5C5C5C;
}
var hash = core_sha1(ipad.concat(str2binb(data)), 512 + data.length * chrsz);
return core_sha1(opad.concat(hash), 512 + 160);
}
/*
* Add integers, wrapping at 2^32. This uses 16-bit operations internally
* to work around bugs in some JS interpreters.
*/
function safe_add(x, y)
{
var lsw = (x & 0xFFFF) + (y & 0xFFFF);
var msw = (x >> 16) + (y >> 16) + (lsw >> 16);
return (msw << 16) | (lsw & 0xFFFF);
}
/*
* Bitwise rotate a 32-bit number to the left.
*/
function rol(num, cnt)
{
return (num << cnt) | (num >>> (32 - cnt));
}
/*
* Convert an 8-bit or 16-bit string to an array of big-endian words
* In 8-bit function, characters >255 have their hi-byte silently ignored.
*/
function str2binb(str)
{
var bin = Array();
var mask = (1 << chrsz) - 1;
for(var i = 0; i < str.length * chrsz; i += chrsz)
bin[i>>5] |= (str.charCodeAt(i / chrsz) & mask) << (32 - chrsz - i%32);
return bin;
}
/*
* Convert an array of big-endian words to a string
*/
function binb2str(bin)
{
var str = "";
var mask = (1 << chrsz) - 1;
for(var i = 0; i < bin.length * 32; i += chrsz)
str += String.fromCharCode((bin[i>>5] >>> (32 - chrsz - i%32)) & mask);
return str;
}
/*
* Convert an array of big-endian words to a hex string.
*/
function binb2hex(binarray)
{
var hex_tab = hexcase ? "0123456789ABCDEF" : "0123456789abcdef";
var str = "";
for(var i = 0; i < binarray.length * 4; i++)
{
str += hex_tab.charAt((binarray[i>>2] >> ((3 - i%4)*8+4)) & 0xF) +
hex_tab.charAt((binarray[i>>2] >> ((3 - i%4)*8 )) & 0xF);
}
return str;
}
/*
* Convert an array of big-endian words to a base-64 string
*/
function binb2b64(binarray)
{
var tab = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
var str = "";
for(var i = 0; i < binarray.length * 4; i += 3)
{
var triplet = (((binarray[i >> 2] >> 8 * (3 - i %4)) & 0xFF) << 16)
| (((binarray[i+1 >> 2] >> 8 * (3 - (i+1)%4)) & 0xFF) << 8 )
| ((binarray[i+2 >> 2] >> 8 * (3 - (i+2)%4)) & 0xFF);
for(var j = 0; j < 4; j++)
{
if(i * 8 + j * 6 > binarray.length * 32) str += b64pad;
else str += tab.charAt((triplet >> 6*(3-j)) & 0x3F);
}
}
return str;
}
// aardwulf systems
// This work is licensed under a Creative Commons License.
// http://www.aardwulf.com/tutor/base64/
function encode64(input) {
var keyStr = "ABCDEFGHIJKLMNOP" +
"QRSTUVWXYZabcdef" +
"ghijklmnopqrstuv" +
"wxyz0123456789+/" +
"=";
var output = "";
var chr1, chr2, chr3 = "";
var enc1, enc2, enc3, enc4 = "";
var i = 0;
do {
chr1 = input.charCodeAt(i++);
chr2 = input.charCodeAt(i++);
chr3 = input.charCodeAt(i++);
enc1 = chr1 >> 2;
enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
enc4 = chr3 & 63;
if (isNaN(chr2)) {
enc3 = enc4 = 64;
} else if (isNaN(chr3)) {
enc4 = 64;
}
output = output +
keyStr.charAt(enc1) +
keyStr.charAt(enc2) +
keyStr.charAt(enc3) +
keyStr.charAt(enc4);
chr1 = chr2 = chr3 = "";
enc1 = enc2 = enc3 = enc4 = "";
} while (i < input.length);
return output;
}
// TITLE
// TempersFewGit v 2.1 (ISO 8601 Time/Date script)
//
// OBJECTIVE
// Javascript script to detect the time zone where a browser
// is and display the date and time in accordance with the
// ISO 8601 standard.
//
// AUTHOR
// John Walker
// http://321WebLiftOff.net
// jfwalker@ureach.com
//
// ENCOMIUM
// Thanks to Stephen Pugh for his help.
//
// CREATED
// 2000-09-15T09:42:53+01:00
//
// REFERENCES
// For more about ISO 8601 see:
// http://www.w3.org/TR/NOTE-datetime
// http://www.cl.cam.ac.uk/~mgk25/iso-time.html
//
// COPYRIGHT
// This script is Copyright 2000 JF Walker All Rights
// Reserved but may be freely used provided this colophon is
// included in full.
//
function isodatetime() {
var today = new Date();
var year = today.getYear();
if (year < 2000) // Y2K Fix, Isaac Powell
year = year + 1900; // http://onyx.idbsu.edu/~ipowell
var month = today.getMonth() + 1;
var day = today.getDate();
var hour = today.getHours();
var hourUTC = today.getUTCHours();
var diff = hour - hourUTC;
if(diff > 12) diff -= 24; // Fix the problem for town with real negative diff
if(diff <= -12) diff += 24; // Fix the problem for town with real positive diff
var hourdifference = Math.abs(diff);
var minute = today.getMinutes();
var minuteUTC = today.getUTCMinutes();
var minutedifference;
var second = today.getSeconds();
var timezone;
if (minute != minuteUTC && minuteUTC < 30 && diff < 0) { hourdifference--; }
if (minute != minuteUTC && minuteUTC > 30 && diff > 0) { hourdifference--; }
if (minute != minuteUTC) {
minutedifference = ":30";
}
else {
minutedifference = ":00";
}
if (hourdifference < 10) {
timezone = "0" + hourdifference + minutedifference;
}
else {
timezone = "" + hourdifference + minutedifference;
}
if (diff < 0) {
timezone = "-" + timezone;
}
else {
timezone = "+" + timezone;
}
if (month <= 9) month = "0" + month;
if (day <= 9) day = "0" + day;
if (hour <= 9) hour = "0" + hour;
if (minute <= 9) minute = "0" + minute;
if (second <= 9) second = "0" + second;
time = year + "-" + month + "-" + day + "T"
+ hour + ":" + minute + ":" + second + timezone;
return time;
}
// (C) 2005 Victor R. Ruiz <victor*sixapart.com>
// Code to generate WSSE authentication header
//
// http://www.sixapart.com/pronet/docs/typepad_atom_api
//
// X-WSSE: UsernameToken Username="name", PasswordDigest="digest", Created="timestamp", Nonce="nonce"
//
// * Username- The username that the user enters (the TypePad username).
// * Nonce. A secure token generated anew for each HTTP request.
// * Created. The ISO-8601 timestamp marking when Nonce was created.
// * PasswordDigest. A SHA-1 digest of the Nonce, Created timestamp, and the password
// that the user supplies, base64-encoded. In other words, this should be calculated
// as: base64(sha1(Nonce . Created . Password))
//
function wsse(Password) {
var PasswordDigest, Nonce, Created;
var r = new Array;
nonceEncoded = hex_sha1(isodatetime() + String(Math.random()) + 'There is more than words');
Created = isodatetime();
PasswordDigest = encode64(hex_sha1(nonceEncoded + Created + Password));
r[0] = nonceEncoded;
r[1] = Created;
r[2] = PasswordDigest;
return r;
}
function wsseHeader(Username, Password) {
var w = wsse(Password);
var header = 'UsernameToken Username="' + Username + '", PasswordDigest="' + w[2] + '", Created="' + w[1] + '", Nonce="' + w[0] + '"';
return header;
}
//generate the header and set it in the environment
pm.environment.set(
"wsse-header",
wsseHeader(pm.environment.get("wsse-user"), pm.environment.get("wsse-secret"))
);
@asknoone
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Hi there.

I came across your script and thought I would share my version. You don't need to include library code within the pre-request script:

// https://code.google.com/archive/p/crypto-js/
const crypto = require('crypto-js');

// Get current timestamp in correct format
var timestamp = (new Date()).toISOString();
// Generate Random 32 byte hex string
var nonce = crypto.lib.WordArray.random(16).toString(crypto.enc.Hex);
// Get secret from environment
var secret = pm.environment.get("secret");
// Create SHA1 Hash of the concatenated nonce, timestamp and secret
var hash = crypto.SHA1(nonce + timestamp + secret);
// Convert the hash into a Base64 encoded version of the hash, represented in hex
var passwordDigest = crypto.enc.Base64.stringify(crypto.enc.Utf8.parse(hash.toString(crypto.enc.Hex)));

// Set environment variables ready for the request
pm.environment.set("password_digest", passwordDigest);
pm.environment.set("nonce", nonce);
pm.environment.set("timestampISO", timestamp);

Hope this helps!

@vassyz
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vassyz commented Sep 1, 2021

@asknoone Thank you! Works nicely. Because I have a lot of requests already defined, I created an env variable with the whole header value:

pm.environment.set("wsse", `UsernameToken Username="${username}", PasswordDigest="${passwordDigest}", Nonce="${nonce}", Created="${timestamp}"`);

@duttong13
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duttong13 commented Dec 11, 2023

@vassyz Thank you for posting too, to build on the last 3 comments I found this script worked perfectly end to end:

// https://code.google.com/archive/p/crypto-js/
const crypto = require('crypto-js');

// Get current timestamp in correct format
var timestamp = (new Date()).toISOString();
// Generate Random 32 byte hex string
var nonce = crypto.lib.WordArray.random(16).toString(crypto.enc.Hex);
// Get secret from environment
var secret = pm.environment.get("secret");
// Create SHA1 Hash of the concatenated nonce, timestamp and secret
var hash = crypto.SHA1(nonce + timestamp + secret);
// Convert the hash into a Base64 encoded version of the hash, represented in hex
var passwordDigest = crypto.enc.Base64.stringify(crypto.enc.Utf8.parse(hash.toString(crypto.enc.Hex)));

// Set environment variables ready for the request
pm.environment.set("password_digest", passwordDigest);
pm.environment.set("nonce", nonce);
pm.environment.set("timestampISO", timestamp);
username = pm.variables.get("username");
pm.environment.set("wsse", `UsernameToken Username="${username}", PasswordDigest="${passwordDigest}", Nonce="${nonce}", Created="${timestamp}"`); 

Note you need a postman environment with the variables, username and secret set and password_digest, nonce, timestampISO and wsse all set to be null.
Then use {{wsse}} as the value for key X-WSSE in your call and job done.

@asknoone
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Great.

@vassyz, might be worth updating the revision with the "final" version. ( If you can be bothered! :-) )

@vassyz
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vassyz commented Dec 11, 2023

@asknoone this is not my gist. I only posted a comment.

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