26 lines
729 B
Common Lisp
26 lines
729 B
Common Lisp
(ql:quickload :cl-base64)
|
|
(ql:quickload :iterate)
|
|
|
|
(use-package :iterate)
|
|
|
|
(defun hex-to-dec (hex-chr)
|
|
(cond
|
|
((char<= #\0 hex-chr #\9)
|
|
(- (char-code hex-chr) (char-code #\0)))
|
|
((char<= #\a hex-chr #\f)
|
|
(+ (- (char-code hex-chr) (char-code #\a)) 10))
|
|
((char<= #\A hex-chr #\F)
|
|
(+ (- (char-code hex-chr) (char-code #\A)) 10))))
|
|
|
|
(defun hex-to-bytes (hex-str)
|
|
(iter
|
|
(for i below (length hex-str) by 2)
|
|
(let ((c1 (hex-to-dec (aref hex-str i)))
|
|
(c2 (hex-to-dec (aref hex-str (1+ i)))))
|
|
(collect (+ (* 16 c1) c2) result-type (vector (unsigned-byte 8))))))
|
|
|
|
;; set 1 challenge 1
|
|
(defun hex-to-base64 (hex-str)
|
|
(cl-base64:usb8-array-to-base64-string (hex-to-bytes hex-str)))
|
|
|
|
|