From f38e7df68371b717f2e6df9164cca4090674faf6 Mon Sep 17 00:00:00 2001
From: okada <okada>
Date: Thu, 9 Dec 1999 04:11:34 +0000
Subject: [PATCH] * sasl.el (sasl-number-base36): New function.
 (sasl-unique-id): New function. (sasl-unique-id-char): New
 variable. * scram-md5.el (scram-make-unique-nonce): Fix to
 use `sasl-unique-id'.

---
 ChangeLog    |   13 +++++++++++++
 sasl.el      |   50 ++++++++++++++++++++++++++++++++++++++++++++++++++
 scram-md5.el |    2 +-
 3 files changed, 64 insertions(+), 1 deletion(-)

diff --git a/ChangeLog b/ChangeLog
index 2fcc4e0..efd3db1 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,18 @@
 1999-12-06  Kenichi OKADA <okada@opaopa.org>
 
+	* sasl.el (sasl-number-base36): New function.
+	(sasl-unique-id): New function.
+	(sasl-unique-id-char): New variable.
+	* scram-md5.el (scram-make-unique-nonce): Fix to use `sasl-unique-id'.
+
+1999-12-06  Kenichi OKADA <okada@opaopa.org>
+
+	* sha1-el.el: Fix.
+	* hex-util.el: Fix.
+
+
+1999-12-06  Kenichi OKADA <okada@opaopa.org>
+
 	* SLIM: Version 1.13.4 released.
 
 1999-12-04  Kenichi OKADA <okada@opaopa.org>
diff --git a/sasl.el b/sasl.el
index db86609..29bf560 100644
--- a/sasl.el
+++ b/sasl.el
@@ -41,6 +41,56 @@
 (defun sasl-plain (authorid authenid passphrase)
   (concat authorid "\0" authenid "\0" passphrase))
 
+(defun sasl-number-base36 (num len)
+  (if (if (< len 0)
+	  (<= num 0)
+	(= len 0))
+      ""
+    (concat (sasl-number-base36 (/ num 36) (1- len))
+	    (char-to-string (aref "zyxwvutsrqponmlkjihgfedcba9876543210"
+				  (% num 36))))))
+
+(defvar sasl-unique-id-char nil)
+
+(defun sasl-unique-id ()
+  ;; Don't use microseconds from (current-time), they may be unsupported.
+  ;; Instead we use this randomly inited counter.
+  (setq sasl-unique-id-char
+	(% (1+ (or sasl-unique-id-char (logand (random t) (1- (lsh 1 20)))))
+	   ;; (current-time) returns 16-bit ints,
+	   ;; and 2^16*25 just fits into 4 digits i base 36.
+	   (* 25 25)))
+  (let ((tm (static-if (fboundp 'current-time)
+		(current-time)
+	      (let* ((cts (split-string (current-time-string) "[ :]"))
+		     (m (cdr (assoc (nth 1 cts)
+				    '(("Jan" . "01") ("Feb" . "02")
+				      ("Mar" . "03") ("Apr" . "04")
+				      ("May" . "05") ("Jun" . "06")
+				      ("Jul" . "07") ("Aug" . "08")
+				      ("Sep" . "09") ("Oct" . "10")
+				      ("Nov" . "11") ("Dec" . "12"))))))
+		(list (string-to-int (concat (nth 6 cts) m
+					     (substring (nth 2 cts) 0 1)))
+		      (string-to-int (concat (substring (nth 2 cts) 1)
+					     (nth 4 cts) (nth 5 cts)
+					     (nth 6 cts))))))))
+    (concat
+     (if (memq system-type '(ms-dos emx vax-vms))
+	 (let ((user (downcase (user-login-name))))
+	   (while (string-match "[^a-z0-9_]" user)
+	     (aset user (match-beginning 0) ?_))
+	   user)
+       (sasl-number-base36 (user-uid) -1))
+     (sasl-number-base36 (+ (car   tm)
+			  (lsh (% sasl-unique-id-char 25) 16)) 4)
+     (sasl-number-base36 (+ (nth 1 tm)
+			  (lsh (/ sasl-unique-id-char 25) 16)) 4)
+     ;; Append the name of the message interface, because while the
+     ;; generated ID is unique to this newsreader, other newsreaders
+     ;; might otherwise generate the same ID via another algorithm.
+     ".sasl")))
+
 (provide 'sasl)
 
 ;;; sasl.el ends here
diff --git a/scram-md5.el b/scram-md5.el
index 7a22f27..1d885e2 100644
--- a/scram-md5.el
+++ b/scram-md5.el
@@ -64,7 +64,7 @@
 (defun scram-make-unique-nonce ()	; 8*OCTET, globally unique.
   ;; For example, concatenated string of process-identifier, system-clock,
   ;; sequence-number, random-number, and domain-name.
-  (concat "<" "foo" "bar" "baz" "@" (system-name) ">")) ; TEMPORARY
+  (concat "<" (sasl-unique-id) "@" (system-name) ">"))
   
 (defun scram-xor-string (str1 str2)
   ;; (length str1) == (length str2) == (length dst) == 16 (in SCRAM-MD5)
-- 
1.7.10.4