code: function pemToRsaSSHKey(pem, comment) {
      assert.equal('string', typeof (pem), 'typeof pem');
  
      var k = sshpk.parseKey(pem, 'pem');
      k.comment = comment;
      return (k.toString('ssh'));
    }
docs: Converts a PKGCS#8 PEM file to an OpenSSH public key (rsa)
  
  The reverse of the above function.