[delphizip] Re: zip *must* be password protected
- From: "R.Peters" <russellpeters@xxxxxxxxxxx>
- To: <delphizip@xxxxxxxxxxxxx>
- Date: Tue, 6 Feb 2007 22:05:47 +1100
It can readily be done
After assigning the filename to ZipMaster it will load the Central Directory
so all you need to do is iterate through the entries checking it is
Encrypted
IsEncrypted := true;
For I := 0 to pred(zip.Count) do
if not zip[i]^.Encrypted then
begin
IsEncrypted := false;
break;
end;
- Russell Peters
-----Original Message-----
From: delphizip-bounce@xxxxxxxxxxxxx [mailto:delphizip-bounce@xxxxxxxxxxxxx]
On Behalf Of Randall Sell
Sent: Tuesday, February 06, 2007 9:17 PM
To: delphizip@xxxxxxxxxxxxx
Subject: [delphizip] zip *must* be password protected
Importance: High
I am wondering... is there a way I can stop a zip from being extracted if it
is NOT password protected?
We have made a large change to our app, and want to ensure that users do NOT
try and open a zip, that is not meant for that particular version of the
software. Obviously once a PW is in place, the older extraction tool will
not be able to unzip it. But the new extraction tool would still be able to
open the older zips, since they have no password. I searched but found no
HasPassword method, etc. So wondering if it is even possible to do this.
on the topic of passwords, any plans to support the 128/256 bit encryption
standard winzip has adopted?
regards,
-randall
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