Qnap Backup Decryptor

A tool to decrypt QNAP NAS encrypted backup files.

This will decrypt backup files (not sync files) created using the QNAP Hybrid Backup Sync tool.

This tool is an alternative to the QENC Decrypter provided by QNAP. This tool is faster by orders of magnitude (eg: 1,800 files takes 0.9 seconds using this tool and approx 20 seconds using the QNAP tool).

Installation

Binaries for Windows, Linux and Mac, are available in Releases.

The QnapBackupDecryptor-FD files are Framework dependent and require an install of .NET 8 to be installed on the system. Available from here. If installing .NET is not an option, the QnapBackupDecryptor-SC files are larger, but do not require a .NET 8 install.

Quickstart

Decrypt a Folder, prompt for password and see the complete output file list

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• Windows QnapBackupDecryptor.exe -e c:\Files\Enc -d c:\Files\Dec --verbose
• Linux ./QnapBackupDecryptor.Console -e ./Files/Enc -d ./Files/Dec --verbose

Decrypt a Folder and see the complete list of files, but specify the password

• Windows QnapBackupDecryptor.exe -e c:\Files\Enc -d c:\Files\Dec --verbose -p Pa$$w0rd
• Linux ./QnapBackupDecryptor.Console -e ./Files/Enc -d ./Files/Dec --verbose -p Pa$$w0rd

Decrypt a Folder and overwrite any duplicate files in the destination

• Windows QnapBackupDecryptor.exe -e c:\Files\Enc -d c:\Files\Dec --verbose --overwrite
• Linux ./QnapBackupDecryptor.Console -e ./Files/Enc -d ./Files/Dec --verbose --overwrite

Decrypt a Folder and delete successfully decrypted source files

WARNING: This will delete the Encrypted files if they are successfully decrypted. Ensure you have backups as the files will not be recoverable!

This will prompt for confirmation (unless you specify -y / --silent)

• Windows QnapBackupDecryptor.exe -e c:\Files\Enc -d c:\Files\Dec --verbose --removeencrypted
• Linux ./QnapBackupDecryptor.Console -e ./Files/Enc -d ./Files/Dec --verbose --removeencrypted

Decrypt a single file to a folder

• Windows QnapBackupDecryptor.exe -e c:\Files\Enc\Encrypted.jpg -d c:\Files\Dec --verbose
• Linux ./QnapBackupDecryptor.Console -e ./Files/Enc/Encrypted.jpg -d ./Files/Dec --verbose

Decrypt a single file and specify the new name

• Windows QnapBackupDecryptor.exe -e c:\Files\Enc\Encrypted.jpg -d c:\Files\Dec\Decrypted.jpg --verbose
• Linux ./QnapBackupDecryptor.Console -e ./Files/Enc/Encrypted.jpg -d ./Files/Dec/Decrypted.jpg --verbose

Available Options

License

This project is licensed under the GPL-3.0 License - see the LICENSE.md file for details

Disclaimer

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.