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;;; guile-gcrypt --- crypto tooling for guile
;;;
;;; Code taken from:
;;;
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2014 Nikita Karetnikov <nikita@karetnikov.org>
;;;
;;; This file is part of guile-gcrypt.
;;;
;;; guile-gcrypt is free software; you can redistribute it and/or modify it
;;; under the terms of the GNU General Public License as published by
;;; the Free Software Foundation; either version 3 of the License, or
;;; (at your option) any later version.
;;;
;;; guile-gcrypt 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
;;; General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with guile-gcrypt. If not, see <http://www.gnu.org/licenses/>.
(define-module (test-base64)
#:use-module (gcrypt base64)
#:use-module (rnrs bytevectors)
#:use-module (srfi srfi-64))
(define (string->base64 str)
(base64-encode (string->utf8 str)))
(define (base64->string base64)
(utf8->string (base64-decode base64)))
(define (string->base64-padding str padding)
(let ((bv (string->utf8 str)))
(base64-encode bv 0 (bytevector-length bv) #f (not padding))))
(define (base64->string-padding base64 padding)
(utf8->string (base64-decode base64 base64url-alphabet #f #f padding)))
;;; Test vectors from <https://tools.ietf.org/rfc/rfc4648.txt>.
(test-begin "base64")
;; Encoding
(test-equal "empty string"
(string->base64 "")
"")
(test-equal "f"
(string->base64 "f")
"Zg==")
(test-equal "fo"
(string->base64 "fo")
"Zm8=")
(test-equal "foo"
(string->base64 "foo")
"Zm9v")
(test-equal "foob"
(string->base64 "foob")
"Zm9vYg==")
(test-equal "fooba"
(string->base64 "fooba")
"Zm9vYmE=")
(test-equal "foobar"
(string->base64 "foobar")
"Zm9vYmFy")
(test-equal "foob (no padding)"
(string->base64-padding "foob" #f)
"Zm9vYg")
(test-equal "foob (padding)"
(string->base64-padding "foob" #t)
"Zm9vYg==")
;; Decoding
(test-equal "empty string"
(base64->string "")
"")
(test-equal "f"
(base64->string "Zg==")
"f")
(test-equal "fo"
(base64->string "Zm8=")
"fo")
(test-equal "foo"
(base64->string "Zm9v")
"foo")
(test-equal "foob"
(base64->string "Zm9vYg==")
"foob")
(test-equal "fooba"
(base64->string "Zm9vYmE=")
"fooba")
(test-equal "foobar"
(base64->string "Zm9vYmFy")
"foobar")
(test-equal "foob (no padding)"
(base64->string-padding "Zm9vYg" #f)
"foob")
(test-equal "foob (padding)"
(base64->string-padding "Zm9vYg==" #t)
"foob")
(test-end "base64")
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