[Zinc SSO] Extended OAuth1 support

Jira uses OAuth1 to authenticate requests to its REST API. But it relies on "RSA-SHA1" signing for authentication, which Zinc SSO does not currently seem to support (it's only "HMAC-SHA1" which is supported). Jira also expects that the consumer secret is sent as a custom header. Are there any plans to extend Zinc SSO in these directions? Or has anyone successfully integrated Jira OAuth in a Pharo application?