Mengenkripsi file PDF

Mengenkripsi file PDF

Gunakan PdfFileSecurity ketika Anda perlu melindungi PDF dengan kata sandi dan aturan hak istimewa.

Langkah

1. Buat sebuah PdfFileSecurity Instansi.
2. Ikat PDF sumber dengan bindPdf.
3. Bangun sebuah objek DocumentPrivilege yang cocok dengan tindakan yang diizinkan.
4. Panggil yang sesuai encryptFile overload untuk ukuran kunci dan algoritma yang Anda butuhkan.
5. Simpan file yang diamankan dan tutup objek.

Contoh Java

public static void encryptPdfWithUserOwnerPassword(Path inputFile, Path outputFile) {
    PdfFileSecurity fileSecurity = new PdfFileSecurity();
    fileSecurity.bindPdf(inputFile.toString());
    DocumentPrivilege privilege = DocumentPrivilege.getForbidAll();
    privilege.setAllowPrint(true);
    fileSecurity.encryptFile("user_password", "owner_password", privilege, KeySize.x128);
    fileSecurity.save(outputFile.toString());
    fileSecurity.close();
}

public static void encryptPdfWithPermissions(Path inputFile, Path outputFile) {
    PdfFileSecurity fileSecurity = new PdfFileSecurity();
    fileSecurity.bindPdf(inputFile.toString());
    DocumentPrivilege privilege = DocumentPrivilege.getAllowAll();
    privilege.setAllowPrint(false);
    privilege.setAllowCopy(false);
    fileSecurity.encryptFile("user_password", "owner_password", privilege, KeySize.x128);
    fileSecurity.save(outputFile.toString());
    fileSecurity.close();
}

public static void encryptPdfWithEncryptionAlgorithm(Path inputFile, Path outputFile) {
    PdfFileSecurity fileSecurity = new PdfFileSecurity();
    fileSecurity.bindPdf(inputFile.toString());
    DocumentPrivilege privilege = DocumentPrivilege.getForbidAll();
    privilege.setAllowPrint(true);
    fileSecurity.encryptFile("user_password", "owner_password", privilege, KeySize.x256, Algorithm.AES);
    fileSecurity.save(outputFile.toString());
    fileSecurity.close();
}