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Unlock a PDF document
if let pdf = unlock(data: pdfData, password: "Hello World") {
print("You now have an unlocked CGPDFDocument")
}
func unlock(data: Data, password: String) -> CGPDFDocument? {
if let pdf = CGPDFDocument(CGDataProvider(data: data as CFData)!) {
guard pdf.isEncrypted == true else { return pdf }
guard pdf.unlockWithPassword("") == false else { return pdf }
if let cPasswordString = password.cString(using: String.Encoding.utf8) {
if pdf.unlockWithPassword(cPasswordString) {
return pdf
}
}
}
return nil
}
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