;; mzcrypto: crypto library for mzscheme
;; Copyright (C) 2007 Dimitris Vyzovitis <vyzo@media.mit.edu>
;;
;; This library is free software; you can redistribute it and/or
;; modify it under the terms of the GNU Lesser General Public
;; License as published by the Free Software Foundation; either
;; version 2.1 of the License, or (at your option) any later version.
;;
;; This library is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
;; Lesser General Public License for more details.
;;
;; You should have received a copy of the GNU Lesser General Public
;; License along with this library; if not, write to the Free Software
;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
;; USA

(module rand mzscheme
  (require (lib "foreign.ss"))
  (require "libcrypto.ss" "error.ss")
  (provide (all-defined))
  
  (define/ffi (RAND_bytes _pointer _uint) -> _int : check-error)
  (define/ffi (RAND_pseudo_bytes _pointer _uint) -> _int : check-error)
  
  (define-syntax define-rand
    (syntax-rules ()
      ((_ rand randf)
       (define (rand k)
         (let ((bs (make-bytes k)))
           (randf bs k)
           bs)))))
  
  (define-rand random-bytes RAND_bytes)
  (define-rand pseudo-random-bytes RAND_pseudo_bytes)
  
  ;; public api
  (define-syntax provide:rand
    (syntax-rules ()
      ((_) (provide random-bytes pseudo-random-bytes))))
)