Importing Oort Gnus v0.06.

[elisp/gnus.git-] / lisp / canlock.el

diff --git a/lisp/canlock.el b/lisp/canlock.el
index 845095f..13e7fbc 100644 (file)
--- a/lisp/canlock.el
+++ b/lisp/canlock.el
@@ -40,12 +40,11 @@
 
 ;;; Code:
 
-(defconst canlock-version "0.8")
-
 (eval-when-compile
   (require 'cl))
 
 (autoload 'sha1-binary "sha1-el")
+(autoload 'base64-encode-string "base64")
 
 (defgroup canlock nil
   "The Cancel-Lock feature."
@@ -96,13 +95,6 @@ buffer does not look like a news message."
   :type 'boolean
   :group 'canlock)
 
-(eval-when-compile
-  (defmacro canlock-string-as-unibyte (string)
-    "Return a unibyte string with the same individual bytes as STRING."
-    (if (fboundp 'string-as-unibyte)
-       (list 'string-as-unibyte string)
-      string)))
-
 (defun canlock-sha1-with-openssl (message)
   "Make a SHA-1 digest of MESSAGE using OpenSSL."
   (let (default-enable-multibyte-characters)
@@ -116,11 +108,22 @@ buffer does not look like a news message."
               canlock-openssl-program t t nil canlock-openssl-args)
        (goto-char (point-min))
        (insert "\"")
-       (while (re-search-forward "[0-9a-f][0-9a-f]" nil t)
-         (replace-match (concat "\\\\x" (match-string 0))))
+       (while (re-search-forward "\\([0-9a-f][0-9a-f]\\)" nil t)
+         (replace-match "\\\\x\\1"))
        (insert "\"")
        (goto-char (point-min))
-       (canlock-string-as-unibyte (read (current-buffer)))))))
+       (read (current-buffer))))))
+
+(eval-when-compile
+  (defmacro canlock-string-as-unibyte (string)
+    "Return a unibyte string with the same individual bytes as STRING."
+    (if (fboundp 'string-as-unibyte)
+       (list 'string-as-unibyte string)
+      string)))
+
+(defun canlock-sha1 (message)
+  "Make a SHA-1 digest of MESSAGE as a unibyte string of length 20 bytes."
+  (canlock-string-as-unibyte (funcall canlock-sha1-function message)))
 
 (defvar canlock-read-passwd nil)
 (defun canlock-read-passwd (prompt &rest args)
@@ -140,26 +143,20 @@ If ARGS, PROMPT is used as an argument to `format'."
 
 (defun canlock-make-cancel-key (message-id password)
   "Make a Cancel-Key header."
-  (cond ((> (length password) 20)
-        (setq password (funcall canlock-sha1-function password)))
-       ((< (length password) 20)
-        (setq password (concat
-                        password
-                        (make-string (- 20 (length password)) 0)))))
-  (setq password (concat password (make-string 44 0)))
-  (let ((ipad (mapconcat (lambda (char)
-                          (char-to-string (logxor 54 char)))
+  (when (> (length password) 20)
+    (setq password (canlock-sha1 password)))
+  (setq password (concat password (make-string (- 64 (length password)) 0)))
+  (let ((ipad (mapconcat (lambda (byte)
+                          (char-to-string (logxor 54 byte)))
                         password ""))
-       (opad (mapconcat (lambda (char)
-                          (char-to-string (logxor 92 char)))
+       (opad (mapconcat (lambda (byte)
+                          (char-to-string (logxor 92 byte)))
                         password "")))
     (base64-encode-string
-     (funcall canlock-sha1-function
-             (concat
-              opad
-              (funcall canlock-sha1-function
-                       (concat ipad
-                               (canlock-string-as-unibyte message-id))))))))
+     (canlock-sha1
+      (concat opad
+             (canlock-sha1
+              (concat ipad (canlock-string-as-unibyte message-id))))))))
 
 (defun canlock-narrow-to-header ()
   "Narrow the buffer to the head of the message."
@@ -250,8 +247,7 @@ message."
                (insert "Cancel-Key: sha1:" key-for-key "\n"))
              (when key-for-lock
                (insert "Cancel-Lock: sha1:"
-                       (base64-encode-string (funcall canlock-sha1-function
-                                                      key-for-lock))
+                       (base64-encode-string (canlock-sha1 key-for-lock))
                        "\n")))))))))
 
 ;;;###autoload
@@ -307,9 +303,9 @@ nil instead of to signal an error by setting the option
        (when locks
          (when id-for-lock
            (setq key-for-lock
-                 (base64-encode-string (funcall canlock-sha1-function
-                                                (canlock-make-cancel-key
-                                                 id-for-lock password))))
+                 (base64-encode-string
+                  (canlock-sha1 (canlock-make-cancel-key id-for-lock
+                                                         password))))
            (when (and locks (not match))
              (setq match (string-equal key-for-lock (pop locks)))))
          (setq locks (if match "good" "bad")))