Swift Requires Chilkat v11.7.0+

Remove the Password and Encryption from a PDF

See more PDF Protection Examples

Demonstrates the removeEncryption operation, which saves the PDF with no encryption at all: no password, no restrictions. It needs owner rights, so the PDF is loaded with its owner password. As with every Protection operation, the change is applied when the file is written. Swift

func chilkatTest() {
    var success: Bool = false

    //  This example requires the Chilkat API to have been previously unlocked.
    //  See Global Unlock Sample for sample code.

    //  The PDF used in this example is available at encrypted_user_password.pdf

    let pdf = CkoPdf()!

    //  Removing the encryption needs owner rights: load with the owner password.
    pdf.ownerPassword = "owner-secret"
    success = pdf.loadFile(filePath: "qa_data/pdf/encrypted_user_password.pdf")
    if success == false {
        print("\(pdf.lastErrorText!)")
        return
    }

    let json = CkoJsonObject()!
    let jsonOut = CkoJsonObject()!
    success = pdf.protection(op: "getInfo", jsonIn: json, jsonOut: jsonOut)
    if success == false {
        print("\(pdf.lastErrorText!)")
        return
    }

    print("encrypted, as loaded: \(jsonOut.bool(of: "loaded.encrypted"))")
    print("algorithm: \(jsonOut.string(of: "loaded.algorithm")!)")

    success = pdf.protection(op: "removeEncryption", jsonIn: json, jsonOut: jsonOut)
    if success == false {
        print("\(pdf.lastErrorText!)")
        return
    }

    print("will be saved encrypted: \(jsonOut.bool(of: "pending.encrypted"))")

    success = pdf.writeFile(path: "qa_output/minutes_unprotected.pdf")
    if success == false {
        print("\(pdf.lastErrorText!)")
        return
    }

    //  The result is an ordinary PDF that opens without a password.
    let reader = CkoPdf()!
    let info = CkoJsonObject()!
    success = reader.preLoadCheck(path: "qa_output/minutes_unprotected.pdf", jsonOut: info)
    if success == false {
        print("\(reader.lastErrorText!)")
        return
    }

    print("encrypted: \(info.bool(of: "encrypted"))")
    success = reader.loadFile(filePath: "qa_output/minutes_unprotected.pdf")
    if success == false {
        print("\(reader.lastErrorText!)")
        return
    }

    print("pages: \(reader.numPages.intValue)")

    //  Sample output:

    //  encrypted, as loaded: True
    //  algorithm: rc4-128
    //  will be saved encrypted: False
    //  encrypted: False
    //  pages: 1

}