Generate RSA-SHA1 signature based off of a string and private key

[SanjivMeher]

I am working on a JIRA integration from Servicenow and the authentication I want to use is oAuth 1.0. As servicenow doesnt support oAuth 1.0, I am writing custom code to make it work.

I have the access token, consumer id etc, and I am trying to generate a signature, with a private key and a string I have.

Is there a function which can generate the signature using RSA-SHA1 algorithm?

I know I can generate the HMAC SHA1, but RSA-SHA1 is not supported

var mac = new CertificateEncryption();
var signature = mac.generateMac(pkey, "RSA-SHA1", signatureBaseString);

[SanjivMeher]

Anyone?

[Rahman4]

Hey mate,

Did you manage to find out a solution for your problem? Appreciate any feedback.

I have a similar problem and would love to hear from you.

TIA

[SanjivMeher · Accepted solution]

Yes. I had a certificate which was in pkcs8 format. I converted it to pkcs12 format and loaded it in sys_certificate table. Once you do that, use below function, which will generate the signature.

var ce = new CertificateEncryption();
ce.sign("sysid of the certificate", "1", "", "SHA1withRSA", "datastring");

[adaml]

This is exactly what I'm looking for! Thanks for providing. The only issue I'm seeing is an error in the logs... "CertificateEncryption" is not defined. 

I tried with and without the () at the end of CertificateEncryption.

var ce = new CertificateEncryption();
ce.sign("8cb02fa5db971850a80f5716f496197f", "", "password", "SHA1withRSA", "sign this data");

var ce = new CertificateEncryption;
ce.sign("8cb02fa5db971850a80f5716f496197f", "", "password", "SHA1withRSA", "sign this data");

How does one use this in the Global Scope?