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Here is a Postman collection of API requests to FortiSOAR organized by folders depending on the authentication mechanism.
Just download the collection + environment variable files and import them into Postman.
The HMAC folder includes APIs with the pre-script in javascript.
Here is the Javascript available in the pre-script tab of HMAC-based authenticated requests:
//
//This script is based on https://docs.fortinet.com/document/fortisoar/7.4.3/api-guide/797122/hmac-authentication
//
//Get URI and replace any {{my_var}} with the relevant value
var replaceVars = function(string)
{
return string.replace(/\{\{.+?\}\}/g, function(match)
{
var varName = match.substr(2, match.length - 4);
var varValue = environment[varName] || globals[varName];
return varValue ? replaceVars(varValue) : match; // recursive!
}); //Thanks to Gitfool for this replace code
}
var fulluri = replaceVars(request.url);
// Build the timestamp value YYYY-MM-DD HH:MM:SS
const currentDate = new Date();
const year = currentDate.getFullYear().toString();
const month = (currentDate.getMonth() + 1).toString().padStart(2, '0');
const day = currentDate.getDate().toString().padStart(2, '0');
const hour = currentDate.getUTCHours().toString().padStart(2, '0');
const minute =currentDate.getMinutes().toString().padStart(2, '0');
const seconde=currentDate.getSeconds().toString().padStart(2, '0');
var timestamp = `${year}-${month}-${day} ${hour}:${minute}:${seconde}`;
// Get the verb
var verb = pm.request.method;
// Build the HASHED Payload and X-CS-Data Header
var payload = pm.environment.get("pub_key");
var hashedpayload = CryptoJS.SHA256(payload).toString();
pm.request.addHeader("X-CS-Data: " + hashedpayload);
// Build the HMAC256 Fingerprint
var SecretPassphrase = pm.environment.get("priv_key");
var rawFingerprint = "sha256." + verb + "." + timestamp + "." + fulluri + "." + hashedpayload;
var hashedFingerprint = CryptoJS.HmacSHA256(rawFingerprint, SecretPassphrase).toString();
// Build the Authorization Header
var rawauth_header = "sha256;" + timestamp + ";" + payload + ";" + hashedFingerprint;
var auth_header = CryptoJS.enc.Base64.stringify(CryptoJS.enc.Utf8.parse(rawauth_header));
pm.request.addHeader("Authorization: CS " + auth_header);
// For debug only. Please uncomment to see some values
console.log("rawFingerprint:"+rawFingerprint,"rawauth_header:"+rawauth_header);
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