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mhashemi's avatar
mhashemi
2 years ago
Solved

Trouble Authenticating to LogicMonitor REST API from ServiceNow

I am trying to convert a PowerShell script to run from ServiceNow and found “Using REST API from ServiceNow Scripting” from two years ago. Since then, ServiceNow has added GlideDigest() which, among ...
api
rest api
ServiceNow
  • Stuart_Weenig's avatar
    Stuart_Weenig
    2 years ago

    Why not use the Postman pre-request script? It’s already in javascript (this one is modified from that one to do just what you were wanting):

    var http_verb = "GET";
    var resource_path = "/device/devices";
    var epoch = (new Date()).getTime();
    var request_vars = (http_verb == 'GET'||http_verb == 'DELETE') ? http_verb + epoch + resource_path : http_verb + epoch + request.data + resource_path;
    var signature = btoa(CryptoJS.HmacSHA256("API_KEY").toString());
    var auth = "LMv1 " + "API_ID" + ":" + signature + ":" + epoch;
    return auth;
asikarwar's avatar
asikarwar
3 months ago

I was able to solve it.

HMAC Signature on client side was not an issue it was generating the correct auth token.

Issue was with resource path not matching with what we had in the URL.

Thanks

Ashish