iPhone - pdf encryption

Question

I've been searching the internet for most of the day today trying to find an answer to this problem. Bascially, I'm trying to create a small app which receives pdfs (from the iTunes file explorer and from a url) then encrypts them and saves them for decryption later.

I've tried using Quartz but with not a lot of documentation available, its difficult. I'm just looking for some guidance on how i should approach this. Any help is much appreciated.

Thanks

You want to encrypt them? or just save them? – thelaws Jul 20 '11 at 15:17 — thelaws, Jul 20 '11 at 15:17

score 4 · Answer 1 · answered Jul 21 '11 at 02:46

You can use the PDFDocument class in Quartz2D to read PDF data from a file or a URL. Once read, you can then save the document with optional encryption via the property kCGPDFContextOwnerPassword.

Reading:

PDFDocument * pdfDoc = [[PDFDocument alloc] initWithData: data];
//or
PDFDocument * pdfDoc = [[PDFDocument alloc] initWithURL: url];

Writing, encrypted:

NSDictionary * pdfOpts = [NSDictionary dictionaryWithObjectsAndKeys: kCGPDFContextOwnerPassword, @"mypassword", nil];
[pdfDoc writeToFile: somepath withOptions: pdfOpts];

You can get a complete list of the specifiable options from the CGPDFContext Reference on Apple's developer web site.

+1 Good answer, thanks, but i already found a solution which works well. — JDx, Jul 21 '11 at 08:54

score 0 · Accepted Answer · answered Jul 21 '11 at 08:54

0

I figured it out. Im using this: http://iphonedevelopment.blogspot.com/2009/02/strong-encryption-for-cocoa-cocoa-touch.html

answered Jul 21 '11 at 08:54

JDx

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iPhone - pdf encryption

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