SecurityInfo

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   I am trying to discover if a PDF has a password or not before attempting to decrypt it.I have tried using SecurityInfo(1) and SecurityInfo(2) which checks for Master and User respectively. At least according to the documentation I have.

They both just seem to just want to return 2 which is 'No'.
I know the file has a password because I can decrypt it using the password.

So I am not sure what I am missing. Any help, please?

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mdgodfrey Members Profile Find Members Posts Team Player Joined: 09 Jul 13 Location: Utah Status: Offline Points: 23	Post Options Post Reply Quote mdgodfrey Report Post Thanks(0) Quote Reply Topic: SecurityInfo Posted: 19 Mar 16 at 12:30AM
	I am trying to discover if a PDF has a password or not before attempting to decrypt it. I have tried using SecurityInfo(1) and SecurityInfo(2) which checks for Master and User respectively. At least according to the documentation I have. They both just seem to just want to return 2 which is 'No'. I know the file has a password because I can decrypt it using the password. So I am not sure what I am missing. Any help, please?

tfrost Members Profile Find Members Posts Senior Member Joined: 06 Sep 10 Location: UK Status: Offline Points: 437	Post Options Post Reply Quote tfrost Report Post Thanks(0) Quote Reply Posted: 19 Mar 16 at 9:17AM
	How did you open in QPDF it if it had a password? You can simply call DAOpenFileReadOnly with an empty password. If the file has a password you should get a zero result and the last error code should be 404. But it depends what type of functionality the password you are checking for would be protecting.

Ingo Members Profile Find Members Posts Moderator Group Joined: 29 Oct 05 Status: Offline Points: 3530	Post Options Post Reply Quote Ingo Report Post Thanks(0) Quote Reply Posted: 19 Mar 16 at 3:31PM
	Up to the 7.xx-versions of QuickPDF you could use SecurityInfo after LoadFromFile to check for user- and masterpassword. Debenu decided then to be completely legal to the pdf-specs. This means that a user-password should prevent for looking into a pdf-document. So the LoadFromFile won't work proper if the pdf-document has a user-password. The main-password isn't a problem - SecurityInfo will check this in a proper way. If you want to load a pdf-document with a user-password, after LoadFromFile it's always necessary now to use LastErrorCode. The last error code 404 shows you that there's a user password. I've comunicated about this issue with Debenu in the past.
	Cheers, Ingo

mdgodfrey Members Profile Find Members Posts Team Player Joined: 09 Jul 13 Location: Utah Status: Offline Points: 23	Post Options Post Reply Quote mdgodfrey Report Post Thanks(0) Quote Reply Posted: 20 Mar 16 at 12:11AM
	That's the answer I needed. Thanks much