Issue 46307 - Support RC4 encryption to load password protected PPT(Powerpoint)-files
Summary: Support RC4 encryption to load password protected PPT(Powerpoint)-files
Status: CONFIRMED
Alias: None
Product: Impress
Classification: Application
Component: open-import (show other issues)
Version: OOo 2.0 Beta
Hardware: Other Windows 98
: P3 Major with 89 votes (vote)
Target Milestone: ---
Assignee: AOO issues mailing list
QA Contact:
URL:
Keywords: ms_interoperability, rfe_eval_ok
: 61691 62955 65376 87922 94963 97966 118448 127346 (view as issue list)
Depends on:
Blocks:
 
Reported: 2005-03-30 15:25 UTC by kupferdachl
Modified: 2017-03-05 14:34 UTC (History)
22 users (show)

See Also:
Issue Type: ENHANCEMENT
Latest Confirmation in: ---
Developer Difficulty: ---


Attachments
the ppt file which caused the issue (1.83 MB, application/vnd.ms-powerpoint)
2005-03-30 15:31 UTC, kupferdachl
no flags Details
MS PowerPoint 2007 dialog requesting password when opening file. (3.80 KB, image/png)
2009-03-26 23:01 UTC, psequeirag
no flags Details

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Description kupferdachl 2005-03-30 15:25:29 UTC
when trying to open an password-encrypted ppt you get following message:

read error
the loading of password-encrypted Microsoft PowerPoint presentation is not
supported..
Comment 1 kupferdachl 2005-03-30 15:31:59 UTC
Created attachment 24419 [details]
the ppt file which caused the issue
Comment 2 wolframgarten 2005-03-30 16:13:16 UTC
Changed to defect, reassigned.
Comment 3 christian.guenther 2005-04-06 15:16:11 UTC
set to new and change the target.
Comment 4 christian.guenther 2005-04-06 15:20:00 UTC
With the internal bug 115982 you fixed something about password protected PPT-Files.
Why can't we load this file.
Has  this file another encryption?
Please have a look.
Comment 5 sven.jacobi 2005-04-26 11:11:54 UTC
sj->cgu: As you can read in 115982 PowerPoint is providing RC4 encryption only,
and RC4 is not be supported by OOo. That time I added the new error message"read
error the loading of password-encrypted Microsoft PowerPoint presentation is not
supported.." so that you are not getting the general io error if trying to load
protected files.
Comment 6 christian.guenther 2005-05-02 18:40:41 UTC
OOo should support RC4 encryption to load Password protected PPT-Files.
Comment 7 bettina.haberer 2005-05-23 13:54:49 UTC
Set issue type, target and keywords.
Comment 8 christian.guenther 2006-03-09 09:03:44 UTC
*** Issue 62955 has been marked as a duplicate of this issue. ***
Comment 9 wolframgarten 2006-05-15 08:47:49 UTC
*** Issue 65376 has been marked as a duplicate of this issue. ***
Comment 10 bmarcelly 2007-12-19 09:05:43 UTC
We can see in various OOo forums that PowerPoint files password protected for 
modifications, but not protected for reading, are becoming common.

Windows users (Win 200 and above) can display them with the free PowerPoint Viewer 
2007.
But users of other OS (Linux, Mac) cannot read these PowerPoint files.

This is a real lack of compatibility for OpenOffice.org in the non-Microsoft world.
Comment 11 wolframgarten 2008-04-07 09:18:17 UTC
*** Issue 61691 has been marked as a duplicate of this issue. ***
Comment 12 wolframgarten 2008-04-07 09:18:38 UTC
*** Issue 87922 has been marked as a duplicate of this issue. ***
Comment 13 cno 2008-04-07 09:28:22 UTC
added 'Powerpoint' to the issues summary
Comment 14 kpalagin 2008-10-17 08:21:13 UTC
Dear developers,
please consider this issue for implementation.
Thanks a lot for your attention.
WBR,
KP.
Comment 15 psequeirag 2009-03-26 23:01:19 UTC
Created attachment 61218 [details]
MS PowerPoint 2007 dialog requesting password when opening file.
Comment 16 wolframgarten 2009-03-27 09:02:23 UTC
*** Issue 94963 has been marked as a duplicate of this issue. ***
Comment 17 clippka 2009-04-15 11:06:25 UTC
ccheney, since you changed the target, do you plan to implement it? Thats great
news!
Comment 18 ccheney 2009-04-17 01:29:50 UTC
cl,

"OOo Later" essentially is a target to send bugs to die never to be fixed or
looked at again. So I bumped up the target from OOo Later since this issue is
becoming more important to users as according to one of the comments they can't
even open documents that are protected from modification. I have no idea how to
fix the bug myself, sorry.
Comment 19 Martin Hollmichel 2009-06-26 13:21:43 UTC
it does not make sense to set a concrete target if no resources are assigned for
implementation, set target to 3.x.
Comment 20 cno 2009-07-31 08:28:54 UTC
@mh: target still shows 3.2 .. which I don't mind, but seems not correct
Comment 21 fbugnon 2009-08-11 01:20:59 UTC
Dear developers,
Please consider this issue for implementation.
I am very happy OpenOffice user, but it is a real problem not to be able to open
those password-protected documents.
Thanks a lot for your attention.
fmbp
Comment 22 wolframgarten 2009-08-13 08:02:25 UTC
*** Issue 97966 has been marked as a duplicate of this issue. ***
Comment 23 mikestp 2010-01-15 19:09:39 UTC
Hi, 
Is it really necessary to support RC4?  Would it be possible to ask the user if
it is ok to open the file in read-only mode if the password is not provided?  In
MS-Office, it is possible to open the file in read-only if the password is not
known.  This should not require RC4 and should be easier to implement; no?

This problem is becoming more and more annoying since more and more files like
that are becoming popular.

Thanks !!!
Comment 24 mickr 2010-01-15 21:21:22 UTC
The real issue isn't that of being open to load as read only or read/write, it's
that files with this protection scheme enabled, even if no password is set,
simply cannot be opened at all.
In case I have fumbled my words: If RC5 password protection is enabled, but no
password is specified, MS Powerpoint considers the files to no be protected and
opens them with full read/write permissions, but OOo cannot open the file at
all.  If the file is opened in MS Pp and the properties edited to remove the RC5
setting (uncheck a box), then OOo can open the file as normal.
Comment 25 mcris 2010-06-01 09:24:05 UTC
So, is anybody working to open .pps files in Open Office that MS Powerpoint
Viewer is able to open? Maybe an Open Office PPS Viewer is necessary. Please
respond.
Comment 26 cno 2010-06-01 13:07:35 UTC
Hi mcris:
Opening pps files ia a different subject. PLs see issue 52755
Comment 27 mcris 2010-06-01 18:22:55 UTC
Not really, since the issue is the Password protect problem with some (many)
.pps files, that for MS Powerpoint Viewer is not a problem, but Open Office
cannot open them.
Comment 28 auligeur 2010-06-21 18:34:28 UTC
This password-protected Microsoft PowerPoint slide show playback issue is really
annoying, this breaks a little compatibility between Microsoft Office and
OpenOffice.org. He would have found a way to open these slide shows just for
reading and when clicking on the icon editing the file, a window appears to
request the password (this is just an idea).
Comment 29 vulcain 2010-12-26 17:29:42 UTC
The issue 110254 (http://qa.openoffice.org/issues/show_bug.cgi?id=110254) could
help to close this issue, isn't it?
Comment 30 vulcain 2010-12-26 17:30:03 UTC
The issue 110254 (http://qa.openoffice.org/issues/show_bug.cgi?id=110254) could
help to close this issue, isn't it?
Comment 31 r4zoli 2011-09-14 06:52:58 UTC
*** Issue 118448 has been marked as a duplicate of this issue. ***
Comment 32 rickyrockrat 2013-09-30 17:16:27 UTC
Wow. It has been over 7 years, and nobody has been able to fix this? Really? The read-only option sounds like a simple short term solution, and shouldn't require encryption.
Comment 33 rickyrockrat 2013-09-30 17:21:28 UTC
So someone who has MSO, can you please post the 3 files for post # 34 in the following URL:
https://bugs.freedesktop.org/show_bug.cgi?id=38370

I could even take a look then.
Comment 34 heywood 2014-05-01 04:44:29 UTC
Just ran into this. (Password-protected PPT, opens fine on PPT 2003 SP3 under XP SP3, fails in OpenOffice 4 on OS X.)

Just added a vote to this bug. To me this is pretty fundamental -- much closer to "broken essential functionality" than "enhancement."

-H
Comment 35 oooforum (fr) 2017-03-05 14:34:38 UTC
*** Issue 127346 has been marked as a duplicate of this issue. ***