On 3/25/19 12:44 PM, Martin Groenescheij wrote:

>> How do I open a document I forgot the password to?
> The same as you open your safe when you forgot the code.

In most cities around the world, one can find a locksmith that
specialises in opening safes.

LibreOffice 3.4.4 and lower uses Blowfish algorithm;
LibreOffice 3.4.5 and higher uses AES-256;

As far as I know, the only way to decrypt AES-256, when the password is
unknown, is brute force.

My now out of date blog on the topic can be found
https://libreoffice-environment.blogspot.com/2015/03/libreoffice-apache-openoffice-password.html

>>   It will not let me make a new copy. The instructions are to open the
>> document and save a copy of it to begin editing it. But, I cannot do
>> that the document will not open without a password. I cannot save a
>> new copy it has to be open before I can save and rename it.
> 
> 
> If it is that easy what is the benefit of having a password set anyway?

Maybe the user pulled that stunt of hand-editing "protected = true". No
password being used.  If that is the case, then the fix is another hand
edit.

It is a stupid hack, that fails far more often that it works, but when
it works....

Probably its best use, is as an April Fools Day prank.


jonathon

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