password

Ubuntu: The file content is encrypted, but currently not supported

 in GNU/Linux  tagged 7zip / encrypted / password / ubuntu by

While trying to extract a password protected/encrypted 7-Zip archive on a fresh Ubuntu 20.04 LTS, we got the following error:

An error occurred while extracting files. The file content is encrypted, but currently not supported.

To fix the problem, we just installed the p7zip-full package using the apt command.

sudo apt-get install p7zip-full;

After that, we were prompted as expected to input the decryption password and we were able to extract the archive.

Below is the information of the package that was retrieved by apt info.

sudo apt info p7zip-full
[sudo] password for bob: 
Package: p7zip-full
Version: 16.02+dfsg-7build1
Priority: optional
Section: universe/utils
Source: p7zip
Origin: Ubuntu
Maintainer: Ubuntu Developers <[email protected]>
Original-Maintainer: Robert Luberda <[email protected]>
Bugs: https://bugs.launchpad.net/ubuntu/+filebug
Installed-Size: 4887 kB
Depends: p7zip (= 16.02+dfsg-7build1), libc6 (>= 2.14), libgcc-s1 (>= 3.0), libstdc++6 (>= 5)
Suggests: p7zip-rar
Breaks: p7zip (<< 15.09+dfsg-3~)
Replaces: p7zip (<< 15.09+dfsg-3~)
Homepage: http://p7zip.sourceforge.net/
Task: kubuntu-desktop, kubuntu-full, xubuntu-desktop, lubuntu-desktop, ubuntustudio-desktop, ubuntukylin-desktop, ubuntu-mate-core, ubuntu-mate-desktop
Download-Size: 1187 kB
APT-Manual-Installed: yes
APT-Sources: http://cy.archive.ubuntu.com/ubuntu focal/universe amd64 Packages
Description: 7z and 7za file archivers with high compression ratio
 p7zip is the Unix command-line port of 7-Zip, a file archiver that
 handles the 7z format which features very high compression ratios.
 .
 p7zip-full provides utilities to pack and unpack 7z archives within
 a shell or using a GUI (such as Ark, File Roller or Nautilus).
 .
 Installing p7zip-full allows File Roller to use the very efficient 7z
 compression format for packing and unpacking files and directories.
 Additionally, it provides the 7z and 7za commands.
 .
 List of supported formats:
   - Packing / unpacking: 7z, ZIP, GZIP, BZIP2, XZ and TAR
   - Unpacking only: APM, ARJ, CAB, CHM, CPIO, CramFS, DEB, DMG, FAT,
     HFS, ISO, LZH, LZMA, LZMA2, MBR, MSI, MSLZ, NSIS, NTFS, RAR (only
     if non-free p7zip-rar package is installed), RPM, SquashFS, UDF,
     VHD, WIM, XAR and Z.
 .
 The dependent package, p7zip, provides 7zr, a light version of 7za,
 and p7zip, a gzip-like wrapper around 7zr.

Create an encrypted 7zip archive with encrypted header as well (no filenames are visible)

 in Bash  tagged 7z / 7zip / encryption / filenames / headers / password / protection by

In case you come to a scenario where you need to encrypt, password protect the contents of a 7zip archive and make sure that not even the filenames of the contents are visible, 7zip has your back! As you can see in the following example you can implement the above requirements very easily.

7z a -p"pbVfdPs27Dc" -mhe hello.7z file1.bin file2.doc files.*

The structure of the above 7z command is the following:

#Based on: 7z <command> [<switches>...] <archive_name> [<file_names>...]
7z a -p"Some Password!.32@" -mhe <archive_name> [<file_names>...]

To break it down, it goes like this:

  • We used the <command> a, which instructs the tool to add the listed files to the listed archive (if the archive does not exist, it will create it).
  • The <switch> -p, allows you to set the password for the archive.
  • The second <switch> -mhe (or -mhe=on) it enables data and header archive encryption.
    In case you cannot find this switch at the manual, check the examples in the man page (This command works on GNU/Linux, it was tested on Fedora).

Anonabox Pro – Set Root Password On Initial Setup

 in Other  tagged Anonabox / Anonabox Pro / initial / password / root by

The following video demonstrates how to setup the root password for a new (or recently flashed) Anonabox Pro.

  1. Connect to the device via the LAN Ethernet port.
    It has a DHCP server by default so you do not need to configure the IP.
    After you get connected, go to the default location of the device interface, which is http://192.168.19.84:1776/.
  2. After the interface loads, click on the Login button without entering a password (if you enter one, it will be ignored).
  3. Then go to the top menu System and select the option Administration
  4. At the new page, under the category Router Password enter the password you wish to use both at the Password and Confirmation fields.
  5. Finally, click on the Save & Apply button and wait for the changes to get applied, a confirmation message will appear at the top of the page under the top menu.

How to instruct SSH use only my password and ignore my (rsa) key

 in GNU/Linux  tagged key / keyboard-interactive / password / PreferredAuthentications / PubkeyAuthentication / rsa / ssh by

Recently, we wanted to connect to a machine via SSH without using the default RSA key that was available in the client’s profile (~/.ssh/id_rsa).

We needed to avoid using the public key authentication method for two reasons:

  1. The client did not want to share the passphrase with us
  2. We did not want to move the key, not even temporarily

So, to connect via SSH while ignoring the key completely we connected using the following command


ssh -o PreferredAuthentications=keyboard-interactive,password -o PubkeyAuthentication=no user@server;

Explanation of parameters:

  • -o Was used to give options in the format used in the configuration file (/etc/ssh/ssh_config). It is useful for specifying options for which there is no separate command-line flag available.
  • -o PreferredAuthentications can be used to change the default order of authentication and bypass the GSSAPI-based authentication, the host-based authentication, the public key authentication and the challenge-response authentication.
    -o PreferredAuthentications=keyboard-interactive,password instructs the server to perform the authentication through the keyboard-interactive method and if that method is not available to use the password method.
    The keyboard-interactive authentication method is a request for all different pieces of information needed for the authentication. The server can specify, which inputs need to be hidden when user types them and which are not.
    The password authentication is a request for a single password. There is no configuration sent by the server. So the client decides how to format the prompt.
  • -o PubkeyAuthentication=no Specifies whether to try public key authentication. By setting the value to no it disables it.