Created attachment 48044 [details]
Testacase file (Microsoft .pps in .7z archive) for bug 38370 (I)

Created attachment 48045 [details]
Testacase file, part II

Created attachment 48046 [details]
Testcase file, part III

Created attachment 48047 [details]
Testcase file, part IV

Created attachment 48048 [details]
Testacase file, part V

Created attachment 48049 [details]
Testcase file, part VI (final)

Reproduced with

Ubuntu 10.04.2 x86
LO 3.4

I don't try ot open file in something else.

[This is an automated message.]
This bug was filed before the changes to Bugzilla on 2011-10-16. Thus it
started right out as NEW without ever being explicitly confirmed. The bug is
changed to state NEEDINFO for this reason. To move this bug from NEEDINFO back
to NEW please check if the bug still persists with the 3.5.0 beta1 or beta2 prereleases.
Details on how to test the 3.5.0 beta1 can be found at:
http://wiki.documentfoundation.org/QA/BugHunting_Session_3.5.0.-1

more detail on this bulk operation: http://nabble.documentfoundation.org/RFC-Operation-Spamzilla-tp3607474p3607474.html

[Reproducible] with reporter's sample and "LibreOffice 3.4.5 English UI [Build ID: OOO340m1 (Build:502)]" parallel Server installation on German WIN7 Home Premium (64bit). Very old problem, also does not open with  "LibreOffice Portable 3.3.0  - WIN7  Home Premium (64bit) German UI [OOO330m19 (Build:6) tag libreoffice-3.3.0.4]", OOo 3.1.1. OOo 3.4Beta and OOo 3.3.3 also fail.

I always get message "Read-Error. The loading of password-encrypted Microsoft PowerPoint presentations is not supported"

So this one seems inherited from OOo.

Works fine with MS PPT VIEWER and reporter's sample.

Currently I see this one as an Enhancement request. Do we have ambition to support that?

@Thorsten:
Please feel free to reassign (or reset Assignee to default) if it’s not your area or if provided information is not sufficient. Please set Status to ASSIGNED if you accept this Bug.

I wonder why MS PPT VIEWER does not ask for a password. May be I'm wrong and this one is related to "OOo 112764 - OO wrongly claims that pps is encrypted"?
Or "46307 - Support RC4 encryption to load password protected PPT(Powerpoint)-file"

(In reply to comment #10)
> I wonder why MS PPT VIEWER does not ask for a password. May be I'm wrong and
> this one is related to "OOo 112764 - OO wrongly claims that pps is encrypted"?
> Or "46307 - Support RC4 encryption to load password protected
> PPT(Powerpoint)-file"

It appears that:-
When someone password protects a PPS so that modifying can only be carried out after a password is entered. Power Point Viewer will open it in read only mode however Libre Office sees that there is a password and will not go any further even though the password is not necessary for read only.

This bug is a very important one; it should be upgraded to high/critical. If somebody sends me (which they do) a normal ppt file which all MSO users can read, then it is a serious setback for LO if it can't even open it.

*** Bug 47075 has been marked as a duplicate of this bug. ***

It's a very old bug, but LibO really should be able to open PW protected .ppt / .pps

Created attachment 74881 [details]
MS .pps file in .7z archive part 1

Created attachment 74882 [details]
MS .pps file in .7z archive part 2

Created attachment 74883 [details]
MS .pps file in .7z archive part 3

Created attachment 74884 [details]
MS .pps file in .7z archive part 4

Created attachment 74885 [details]
MS .pps file in .7z archive part 5

Created attachment 74886 [details]
MS .pps file in .7z archive part 6

Created attachment 74887 [details]
MS .pps file in .7z archive part 7

Created attachment 74888 [details]
MS .pps file in .7z archive part 8

Times are changing, Libre Office too but this bug still exist.
Fedora 18  - LO 3.6.5
Windows XP - LO 3.6.5
Windows XP - LO 4.0.0.3

I attached Thursday.pps for testing purposes

RR: (In reply to comment #23)
May be you can tell us the intention behind the latest attachments and comment?

I am sorry for my sarcasm but no one care about old bug.
My intention was to awake people and have possibilities to opening MSO files without buying this proprietary software.

Problem is as in Description of bug and, for example, comment #9
"Read error. Loading password-protected Microsoft files is not supported"

Attached file isn't password protected and users of MSO can read it without any password.

Created attachment 74929 [details]
MS .pps file in .7z archive part 2 (binary)

Right content type.

Created attachment 74930 [details]
MS .pps file in .7z archive part 3 (binary)

Right content type.

Created attachment 74931 [details]
MS .pps file in .7z archive part 4 (binary)

Right content type.

Created attachment 74932 [details]
MS .pps file in .7z archive part 5 (binary)

Right content type.

Created attachment 74933 [details]
MS .pps file in .7z archive part 6 (binary)

Right content type.

So - commenting out

if ( pStorage->IsStream( rtl::OUString("EncryptedSummary" ) ) ) in sd/source/filter/sdpptwrp.cxx, instead of the "cannot open password-encrypted doc" gets us a "Version incompatibility. Incorrect file version." error instead. So I presume, since the ole stream carries this EncryptedSummary, there _is_ some (possibly empty / redundant) encryption in this file.

Someone with a bit of time at their hands to dig into the binary file format needs to have a look. I'm afraid I cannot currently commit to this.

Same issue here... file has a password to modify but not read. Looks like it has been ignored since at least 2005 (https://issues.apache.org/ooo/show_bug.cgi?id=46307), though not fully Libre's fault of course. Any chance to get some bug-fix love?

*** Bug 62611 has been marked as a duplicate of this bug. ***

Hi

Can someone please help with the following :

1 - create simple one slide presentation in PowerPoint
2 - save without passWord as 
    38370_test_WithoutPassword.pps
3 - save again _with_ passWord as 
    38370_test_WithPassword.pps
4 - then remove password
    and save again as 
    38370_test_RemovedPassword.pps

Pls attacht the three files (or as one in zip).
I'll ask someone who did some digging in binaries before to have a look.
And then only the code has to be extented ;)

thanks,

Created attachment 87604 [details]
Test file (1) - Without Password

Created attachment 87605 [details]
Test file (2) - With Password

Created attachment 87606 [details]
Test file (3) - Removed Password

(In reply to comment #34)

Please see the attached files.

(In reply to comment #38)
> (In reply to comment #34)
> 
> Please see the attached files.

Thanks Geraldo!
Cor

Created attachment 93406 [details]
zip with dump & diff

Hi,

Being at the UX-Hackfest, Miklos was so friendly to help me with getting up with
  git://anongit.freedesktop.org/libreoffice/contrib/mso-dumper

Made an output of files
 - 38370_test_WithoutPassword.pps
 - 38370_test_RemovedPassword.pps
and a diff of the two

I'll attach the 38370_dumped_diff.zip with
 38370_without
 38370_removed
 38370_diff_removed_without


Most remarkable differences seem to me the lines
240, 288, 304

Would appreciate any specialist to step in.
thanks,
Cor

@froby

See comment 31, 34, 40 : is this something within your reach pls?

thanks!
Cor

(In reply to comment #41)
> @froby
> 
> See comment 31, 34, 40 : is this something within your reach pls?
> 
> thanks!
> Cor

Sure, will look into that in a day or two.

First of all LO 4.1.x seems to open file with removed password without any problem here. All differences I see between "without_password" and "removed_password" are not related to passwords/security.

At second the initially attached 6 parts 7z archive CONTAINS PASSWORD PROTECTED FILE.
If you try to open it in MS Office it will ask for password and w/o password will allow to open the document as read-only.

So Rainer was right in the comment #9 -- it's an enhancement request.

For potential implementor:

<caolan> I have no idea about this specific .pps/ppt encryption mechanism, but FWIW there is various shared bits, e.g. include/filter/msfilter/mscodec.hxx for the crippled rc4 stuff used in msoffice 97 which might be relevant