AWS Signing Signature

[waseem5]

Hi,

We are trying to invoke AWS from ServiceNow and need to get signature by using HMAC-SHA26. We want to imitate the methods of encryption from crypto-js. For example, below needs to be coded in ServiceNow scripts: Crypto.HMAC(Crypto.SHA256, dateStamp, "AWS4" + key, { asBytes: true}

We have found below Script Include but unable to locate the exact method within:

1. AWSRequestSigner
2. AWSRESTMessage
3. AWSRESTPostMessage
4. AWSRESTRequestSigningUtil
5. FormationRESTActivityBase

If anybody here has any input, it will be of great help!

Thanks in anticipation

Waseem

[david631]

I don't know. My team spent a long time trying to figure out where that script came from, but we never did find out.

[anashanifm]

I think its is a part of Cloud provisioning and governance module. Do install it in personal instance and copy the script from there.

[harshini_ks]

I am using STS to assume role so the first call to STS works with AWSRequestSigner. Now for second request, since credential is dynamic, I need to use script to generate signature and its getting harder to do it. Any util that can be used instead?