How to Unzip Password-Protected ZIP Files in Go?

Unzipping Password-Protected ZIP Files in Go 1.2

In Go 1.2, the archive/zip package provides basic zip functionality, but lacks support for handling password-protected files. To unzip such files, it is recommended to utilize the os/exec package in conjunction with external tools like 7zip.

Using 7zip to Extract Password-Protected ZIP Files

The following example demonstrates how to extract a password-protected ZIP file using 7zip:

<code class="go">func extractZipWithPassword() {
    fmt.Printf("Unzipping `%s` to directory `%s`\n", zip_path, extract_path)
    commandString := fmt.Sprintf(`7za e %s -o%s -p"%s" -aoa`, zip_path, extract_path, zip_password)
    commandSlice := strings.Fields(commandString)
    fmt.Println(commandString)
    c := exec.Command(commandSlice[0], commandSlice[1:]...)
    e := c.Run()
    checkError(e)
}</code>

In this example, we construct a command string using the 7za executable to extract the ZIP file. We specify the file path, extraction directory, password, and additional options to overwrite existing files and update archive timestamps (-aoa). Then, we execute the command using the exec.Command function and check for any errors.

Additional Resources

• [7-Zip Official Website](https://www.7-zip.org/)
• [7-Zip User Guide](https://wiki.7-zip.org/7-Zip_User_Guide)
• [Go os/exec Package Documentation](https://golang.org/pkg/os/exec/)

Note:

While this approach relies on an external tool, it provides a straightforward solution for handling password-protected ZIP files in Go.

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