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From chas@cmf.nrl.navy.mil  Mon May  1 16:46:07 2000
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Date: Mon, 1 May 2000 16:45:49 -0400
From: Chas Williams <chas@cmf.nrl.navy.mil>
Reply-To: chas@cmf.nrl.navy.mil
To: krb5-bugs@MIT.EDU
Subject: bug in krb5/lib/str_conv.c::krb5_timestamp_to_[sf]string()
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>Number:         851
>Category:       krb5-libs
>Synopsis:       krb5_timestamp_to_[sf]string() fails to correct for macintosh epoch
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    krb5-unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   unknown
>Arrival-Date:   Mon May  1 16:47:00 EDT 2000
>Last-Modified:
>Originator:     Chas Williams
>Organization:
	Naval Research Laboratory, Washington, DC
>Release:        1.0pl1
>Environment:
	power mac g4, macos 9.0
	code warrior pro 4

>Description:
	krb5_timestamp_to_string() and krb5_timestamp_to_sfstring()
	in krb5/lib/str_conv.c fails to correct for the macintosh epoch
	which is about 70 years different from the unix epoch. 

	generally, unix timestamps needs to be 'offseted' before being
	sent through the 'ansi' date routines on the macintosh

	this problem probably also exists in the mit kerberos for the
	macintosh release unless the custom libc used by the mit
	programmers already corrects for this 'defect'

>How-To-Repeat:
	very few applications on the macintosh actually convert timestamps
	to a human readable format, so its difficult to reproduce unless you
	have one of these applications.

>Fix:

	something like this needs to be added fairly early to the
	routines:

	#ifdef macintosh
	   extern krb5_int32 getTimeZoneOffset();

	   timestamp += (((70 * 365) + 17) * 24 * 3600) + getTimeZoneOffset();
	#endif /* macintosh */

>Audit-Trail:
>Unformatted: