Date: Fri, 26 Oct 2001 07:35:03 -0700 (PDT) From: Alan Eldridge <alane@geeksrus.net> To: freebsd-gnats-submit@FreeBSD.org Subject: ports/31508: Coding error in py-4suite: Ft/Lib/Uuid.py throws away half of generated UUID Message-ID: <200110261435.f9QEZ3699367@freefall.freebsd.org>
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>Number: 31508
>Category: ports
>Synopsis: Coding error in py-4suite: Ft/Lib/Uuid.py throws away half of generated UUID
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-ports
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Fri Oct 26 07:40:01 PDT 2001
>Closed-Date:
>Last-Modified:
>Originator: Alan Eldridge
>Release: 4.4-RELEASE
>Organization:
>Environment:
FreeBSD wwweasel.geeksrus.net 4.4-RELEASE FreeBSD 4.4-RELEASE #0: Mon Oct 22 16:59:49 EDT 2001 root@wwweasel.geeksrus.net:/usr/src/sys/compile/WWWEASEL i386
>Description:
There's a typo (?) in Ft.Lib.Uuid.UuidAsString(uuid), where a loop to convert an integer to a string of bytes is only picking up the lower 4 bits of each byte.
This results in half of the bits of the UUID being thrown away in the conversion to string.
I have not yet checked, but this is probably fixed in the newest version of the the 4suite code.
>How-To-Repeat:
[alane@wwweasel ~/sw/ftom/linkman]$ python
Python 2.1.1 (#1, Sep 13 2001, 18:12:15)
[GCC 2.95.3 20010315 (release) [FreeBSD]] on freebsd4
Type "copyright", "credits" or "license" for more information.
>Fix:
Make this fix (changing 0xF to 0xFF).
[alane@wwweasel ~/sw/ftom/linkman]$ diff -u Uuid.py.or Uuid.py
--- Uuid.py.or Sun Dec 3 05:52:27 2000
+++ Uuid.py Fri Oct 26 10:27:41 2001
@@ -64,7 +64,7 @@
newUuid = ''
curUuid = uuid
for ctr in range(16):
- num = int(curUuid & 0xF)
+ num = int(curUuid & 0xFF)
newChar = chr(num)
curUuid = curUuid >> 8
newUuid = newChar + newUuid
[alane@wwweasel ~/sw/ftom/linkman]$
>Release-Note:
>Audit-Trail:
>Unformatted:
>>> import Uuid
>>> u = Uuid.GenerateUuid()
>>> u
293274167793379733969387239632193121121L
>>> hex(u)
'0xDCA28CD7BC1B44DDB23830439C76EB61L'
>>> Uuid.UuidAsString(u)
'c020c07-c0b-40d-208-30c06b01'
>>>
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