Copy CGPDFDocument to Data

copyPDFtoData.swift

if let pdf = unlock(data: pdfData, password: "Hello World") {
	print("You now have an unlocked CGPDFDocument")
    
    print("Create a copy of the unlocked CGPDFDocument")
    let pdfWithoutPassword = copyPDFtoData(pdf: pdf)    
    
    print("You how have a pdf without password information")
    
}

func copyPDFtoData(pdf: CGPDFDocument) -> Data {
    let data = NSMutableData()
    
    autoreleasepool {
        let pageCount = pdf.numberOfPages
        UIGraphicsBeginPDFContextToData(data, .zero, nil)
        
        for index in 1...pageCount {
            
            let page = pdf.page(at: index)
            let pageRect = page?.getBoxRect(CGPDFBox.mediaBox)
            
            
            UIGraphicsBeginPDFPageWithInfo(pageRect!, nil)
            let ctx = UIGraphicsGetCurrentContext()
            ctx?.interpolationQuality = .high
            // Draw existing page
            ctx!.saveGState()
            ctx!.scaleBy(x: 1, y: -1)
            ctx!.translateBy(x: 0, y: -(pageRect?.size.height)!)
            ctx!.drawPDFPage(page!)
            ctx!.restoreGState()
            
        }
        
        UIGraphicsEndPDFContext()
    }
    return data as Data
}