Removing Password

Removing the password refers to the process where a user with owner permissions removes both the owner and user passwords, allowing the document to be opened without a password and defaulting to full access without restrictions.

Steps to remove a password:

Open the document using the CPDFReaderWidget component.
Unlock the document and gain full permissions.
Remove the password from the unlocked document.

Here is an example of how to remove a password:

dart

late CPDFReaderWidgetController _controller;

@override
Widget build(BuildContext context) {
  return Scaffold(
    resizeToAvoidBottomInset: false,
    appBar: AppBar(),
    body: Column(children: [
      TextButton(onPressed: () async{

        bool removePasswordResult = await _controller.document.removePassword();

      }, child: const Text('Encrypt PDF')),
      Expanded(child: CPDFReaderWidget(
        document: widget.documentPath,
        configuration: CPDFConfiguration(),
        onCreated: (controller) {
          setState(() {
            _controller = controller;
          });
        },
      ))
    ],));
}

For easy customization of UI for setting and removing passwords in Flutter, the following APIs are available:

Check if Document is Encrypted:

dart

bool isEncrypted = await controller.isEncrypted();

Get Document Permissions Status:

dart

CPDFDocumentPermissions permissions = await controller.getPermissions();

Different Permission States:

Permission State	Description	Enum Value
None	No permissions are applied to the document	`CPDFDocumentPermissions.none`
User	Document opened with user password; may have printing and copying restrictions	`CPDFDocumentPermissions.user`
Owner	Document opened with owner password; no restrictions	`CPDFDocumentPermissions.owner`

Check Owner Permissions:

dart

// Check if the current document is unlocked with owner permissions
bool unlocked = await controller.checkOwnerUnlocked();

// Check if the owner password is correct
bool result = await controller.checkOwnerPassword('owner_password');

Removing Password ​

Removing Password