;;; -*- Lisp -*-
;;; $Id$
;;;
;;; Scratch pad for working out API design for RPKI engine.
;;;
;;; This file is psuedocode, I just wanted to take advantage of
;;; emacs's built-in support for languages with reasonable syntax.
;;;
;;; Terminology:
;;;
;;; - IRBE: Internet Registry Back End
;;;
;;; - RE: RPKI Engine



;;; Protocol operations between RE and signing engine.  This assumes
;;; the model in which the signing engine stores nothing but keypairs
;;; and takes orders from the RE on what to sign; this still needs to
;;; be checked by competent paranoids.

;; Create a keypair.  :length is the number of bits for the key
;; (default 2048?).

(create-keypair :cust-id 42
		:length 2048)
=> (public-key key-id)

;; Destroy a keypair.

(destroy-keypair :cust-id 42
		 :key-id key-id)
=> ()

;; List existing keypairs

(list-keypairs :cust-id 42)
=> ((key-id public-key)
    (key-id public-key)
    ...)

;; Sign something.  how-to-sign tells us both what signature method to
;; use (ie, what kind of object we're signing) and also the signature
;; algorithm to use (where there are multiple choices, which perhaps
;; there should not be?).

(sign-thing :cust-id		42
	    :what-to-sign	cert-without-signature
	    :how-to-sign	:cert-rsa/sha256
	    :key-id		key-id)
=> (signed-thing)



;;; Protocol operations between IRBE and RE.
;;;
;;; This is really two separate protocols over channels that might or
;;; not be the same.  Both are client/server protocols, but for some
;;; the rpki engine and for others the irbe is the client.
;;;
;;; This set of operations are initiated by the IRBE.

(create-cust-id)
=> (customer-id)

(destroy-cust-id :cust-id 42)
=> ()

(list-cust-ids)
=> (customer-id ...)

;; RobK wonders whether there needs to be an operation that blows away
;; most of the context but preserves things like audit logs.  No
;; current consensus on need for this.

(get-preference :cust-id 42
		:preference-name :favorite-color)
=> ("obsidian")

(set-preference :cust-id 42
		:name  :favorite-color
		:value "obsidian")
=> ()

;; Extensions might also show up as preferences that nobody but this
;; IRBE operator has ever heard of

;; The following create RPKI CA contexts

(create-ca-context :cust-id 42)
=> (ca-id)

(destroy-ca-context :cust-id 42
		    :ca-id foo)
=> ()

;; This creates both a context and a keypair
(create-biz-signing-context :cust-id 42)
=> (biz-signing-context-id pkcs10-cert-request)

(destroy-biz-signing-context :cust-id 42
			     :biz-signing-context-id biz-context-id)
=> ()

(list-biz-signing-contexts :cust-id 42)
=> (biz-signing-context-id ...)

(get-biz-signing-certs :cust-id 42
		       :biz-signing-context-id splat)
=> (cert ...)

(set-biz-signing-certs :cust-id 42
		       :biz-signing-context-id splat
		       (cert ...))
=> ()

(set-ca-parent-ta :cust-id 42
		  :ca foo
		  :ta ta)
=> ()

(get-ca-parent-ta :cust-id 42
		  :ca foo)
=> (ta)

(set-ca-parent-uri :cust-id 42
		   :ca foo
		   :uri uri)
=> ()

(get-ca-parent-uri :cust-id 42
		   :ca foo)
=> (uri)

(set-ca-parent-biz-signing-context :cust-id 42
				   :ca foo
				   :biz-signing-context foo)
=> ()

(get-ca-parent-biz-signing-context :cust-id 42
				   :ca foo)
=> (biz-signing-context)

(create-ca-child :cust-id 42
		 :ca foo)
=> (child)

(destroy-ca-child :cust-id 42
		  :ca foo
		  :child bar)
=> ()

(list-ca-children  :cust-id id
		   :ca foo)
=> (child ...)

(set-child-ta :cust-id 42
	      :child foo
	      :ta bar)
=> ()

(get-child-ta :cust-id 42
	      :child foo)
=> (ta)

(set-child-biz-signing-context :cust-id 42
			       :child foo
			       :biz-signing-context bar)
=> ()

(get-child-biz-signing-context :cust-id 42
			       :child foo)
=> (signing-context)

(set-ca-repo-ta :cust-id 42
		:ca foo
		:ta ta)
=> ()

(get-ca-repo-ta :cust-id 42
		:ca foo)
=> (ta)

(set-ca-repo-uri :cust-id 42
		 :ca foo
		 :uri uri)
=> ()

(get-ca-repo-uri :cust-id 42
		 :ca foo)
=> (uri)

(set-ca-repo-biz-signing-context :cust-id 42
				 :ca foo
				 :biz-signing-context foo)
=> ()

(get-ca-repo-biz-signing-context :cust-id 42
				 :ca foo)
=> (biz-signing-context)

(please-run-this-cust-id-now :cust-id 42)



;;; Protocol operations between IRBE and RE.
;;;
;;; This is really two separate protocols over channels that might or
;;; not be the same.  Both are client/server protocols, but for some
;;; the rpki engine and for others the irbe is the client.
;;;
;;; This set of operations are initiated by the RE.

(list-resources :cust-id 42
		&optional
		:ca ca)			; If left off, we're asking about self rather than child
=> ((:ipv4-address "10.0.0.44/32" "10.3.0.44/32")
    (:ipv6-address "fe80:dead:beef::/24")
    ...)

(list-rights-to-route :cust-id 42)	; Self
=> ((as-number :ipv4 prefix-or-range :ipv6 prefix-or-range ...)
    (as-number "ipv6 prefix-or-range :ipv6 prefix-or-range :ipv4 prefix-or-range ...)
    ...)

(report-error :cust-id 42
	      :error-token :your-hair-is-on-fire
	      :bag-of-data whatever)
=> ()



;;; Repository update protocol.  Same basic CMS-signed XML mess we use
;;; elsewhere, this time with RE as client, lodging repository as
;;; server.  Authorization is a combination of business key and
;;; resource key/cert: biz key demonstrates that we're authorized to
;;; play with this repository at all, resource cert demonstrates
;;; relationship to the datum to be published.

(publish-thing :thing-type :crl
	       :signed-thing signed-thing)
=> ()

;;; Where signed-thing looks like:
;;;
;;;      (repo-biz-key-signature
;;;	   (ca-key-signature
;;;	     object-to-publish))
;;;
;;; NB: the ca-key-signature is a simple signature with no
;;; certificates embedded, as we can't assume that the repository
;;; knows the trust anchor.  More precisely, if the crypto guys tell
;;; us that we must do cert chain verification here, the business
;;; setup for all this has to make sure that the repository operator
;;; -does- know the RPKI trust anchor and we'd kind of rather not go
;;; there.  The repo-biz-key-signature is cms with the full signer
;;; cert chain in the bag plus the resource cert as an extra cert in
;;; the bag.
;;;
;;; SIA in the signing resource cert's tells us where to publish the
;;; object.