IsEncrypted (Check if an archive is encrypted)

[lxp]

This add-in provides a script column IsEncrypted, which checks whether an archive is encrypted and requires a password to be opened.

The column returns one of four values:

value	meaning
1	Archive is encrypted (or corrupted)
0	Archive is not encrypted
-1	Not an archive (file or directory)
-2	Error running 7z (e.g., 7z.exe not found)

The script determines the encryption status by testing the file with 7-Zip using a dummy password and interpreting the result. If the archive cannot be opened, it is classified as encrypted. Note that this may also indicate that the file is corrupted.

---

How to set up and use

Download and install 7-Zip from 7-zip.org or run winget install --id 7zip.7zip.

Save ColumnIsEncrypted.js.txt to   ↓

%appdata%\GPSoftware\Directory Opus\Script AddIns

Usage examples

• Toggle the column

Set COLUMNSTOGGLE="scp:IsEncrypted/IsEncrypted(!,a,0)"

• Find encrypted archives in the source

Find FILTERDEF script match IsEncrypted/IsEncrypted > 0

• Define a Filter Label

Things you might enjoy reading

How to use buttons and scripts from this forum

The script's inner workings

JScript

// return values:
// 1   Archive is encrypted (or corrupted)
// 0   Archive is not encrypted
// -1  Not an archive (file or directory)
// -2  Error running 7z (e.g., 7z.exe not found)

var fsu = DOpus.FSUtil();
var exe7z = fsu.Resolve('/programfiles\\7-Zip\\7z.exe');

function OnInit(initData) {
    initData.name = 'IsEncrypted';
    initData.version = '2026-06-17';
    initData.url = 'https://resource.dopus.com/t/isencrypted-check-if-an-archive-is-encrypted/59753';
    initData.desc = 'Check if an archive is encrypted';
    initData.default_enable = true;
    initData.min_version = '13.18';
}

function OnAddColumns(addColData) {
    var col = addColData.AddColumn();
    col.name = 'IsEncrypted';
    col.method = 'OnColumn';
    col.type = 'double';
}

function OnColumn(scriptColData) {
    scriptColData.value = -1;  // default value: not an archive

    var item = scriptColData.item;

    if (item.is_dir) return;
    if (!item.InGroup('Archives')) return;

    var cmdLine = '"' + exe7z + '"' +
        ' t "' + item + '"' +
        ' -pDummyPassword';  // Testing with a dummy password to check if the archive is encrypted. Please change the password if you happen to use this one ;-)

    var result = fsu.Run(cmdLine, 0, true);

    scriptColData.value = result ? result.exitcode ? 1 : 0 : -2;
}