@sexycoders/libauth.js/src/shared/sign.js

A full service for asymetric passwordless authentication.

function Sign(data,key)
  {
    var pki = forge.pki;
    var pKey = pki.privateKeyFromPem(key);

    var md = forge.md.sha256.create();
    md.update(data,'utf8');
  return pKey.sign(md);
  }