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;;;;
;;;; Copyright (c) 2008 Zachary Beane, All Rights Reserved
;;;;
;;;; Redistribution and use in source and binary forms, with or without
;;;; modification, are permitted provided that the following conditions
;;;; are met:
;;;;
;;;; * Redistributions of source code must retain the above copyright
;;;; notice, this list of conditions and the following disclaimer.
;;;;
;;;; * Redistributions in binary form must reproduce the above
;;;; copyright notice, this list of conditions and the following
;;;; disclaimer in the documentation and/or other materials
;;;; provided with the distribution.
;;;;
;;;; THIS SOFTWARE IS PROVIDED BY THE AUTHOR 'AS IS' AND ANY EXPRESSED
;;;; OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
;;;; WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
;;;; ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
;;;; DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
;;;; DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
;;;; GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
;;;; INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
;;;; WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
;;;; NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
;;;; SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
;;;;
;;;; post.lisp
(in-package #:zs3)
(defclass post-policy ()
((expires
:initarg :expires
:accessor expires)
(conditions
:initarg :conditions
:accessor conditions)))
(defgeneric policy-serialize (object stream))
(defmethod policy-serialize ((condition cons) stream)
(destructuring-bind (type field value &optional value2)
condition
(ecase type
((:eq :starts-with)
(format stream "[~S, \"$~A\", ~S]"
(string-downcase type)
field
value))
(:range
(format stream "[~S, ~D, ~D]" field value value2)))))
(defmethod policy-serialize ((policy post-policy) stream)
(format stream "{\"expiration\": ~S, \"conditions\": ["
(iso8601-date-string (expires policy)))
(when (conditions policy)
(destructuring-bind (first &rest rest)
(conditions policy)
(when first
(policy-serialize first stream)
(dolist (condition rest)
(format stream ",")
(policy-serialize condition stream)))))
(format stream "]}"))
(defun policy-string64 (policy)
(string64
(with-output-to-string (stream)
(policy-serialize policy stream))))
(defun policy-signature (key policy)
(sign-string key (policy-string64 policy)))
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