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283 lines
11 KiB
Markdown
283 lines
11 KiB
Markdown
Toplip – A Very Strong File Encryption And Decryption CLI Utility
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======
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There are numerous file encryption tools available on the market to protect
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your files. We have already reviewed some encryption tools such as
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[**Cryptomater**][1], [**Cryptkeeper**][2], [**CryptGo**][3], [**Cryptr**][4],
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[**Tomb**][5], and [**GnuPG**][6] etc. Today, we will be discussing yet
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another file encryption and decryption command line utility named **"
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Toplip"**. It is a free and open source encryption utility that uses a very
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strong encryption method called **[AES256][7]** , along with an **XTS-AES**
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design to safeguard your confidential data. Also, it uses [**Scrypt**][8], a
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password-based key derivation function, to protect your passphrases against
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brute-force attacks.
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### Prominent features
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Compared to other file encryption tools, toplip ships with the following
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unique and prominent features.
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* Very strong XTS-AES256 based encryption method.
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* Plausible deniability.
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* Encrypt files inside images (PNG/JPG).
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* Multiple passphrase protection.
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* Simplified brute force recovery protection.
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* No identifiable output markers.
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* Open source/GPLv3.
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### Installing Toplip
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There is no installation required. Toplip is a standalone executable binary
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file. All you have to do is download the latest toplip from the [**official
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products page**][9] and make it as executable. To do so, just run:
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```
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chmod +x toplip
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```
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### Usage
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If you run toplip without any arguments, you will see the help section.
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```
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./toplip
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```
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[![][10]][11]
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Allow me to show you some examples.
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For the purpose of this guide, I have created two files namely **file1** and
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**file2**. Also, I have an image file which we need it to hide the files
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inside it. And finally, I have **toplip** executable binary file. I have kept
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them all in a directory called **test**.
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[![][12]][13]
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**Encrypt/decrypt a single file**
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Now, let us encrypt **file1**. To do so, run:
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```
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./toplip file1 > file1.encrypted
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```
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This command will prompt you to enter a passphrase. Once you have given the
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passphrase, it will encrypt the contents of **file1** and save them in a file
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called **file1.encrypted** in your current working directory.
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Sample output of the above command would be:
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```
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This is toplip v1.20 (C) 2015, 2016 2 Ton Digital. Author: Jeff Marrison A showcase piece for the HeavyThing library. Commercial support available Proudly made in Cooroy, Australia. More info: https://2ton.com.au/toplip file1 Passphrase #1: generating keys...Done
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Encrypting...Done
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```
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To verify if the file is really encrypted., try to open it and you will see
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some random characters.
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To decrypt the encrypted file, use **-d** flag like below:
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```
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./toplip -d file1.encrypted
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```
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This command will decrypt the given file and display the contents in the
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Terminal window.
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To restore the file instead of writing to stdout, do:
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```
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./toplip -d file1.encrypted > file1.decrypted
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```
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Enter the correct passphrase to decrypt the file. All contents of **file1.encrypted** will be restored in a file called **file1.decrypted**.
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Please don't follow this naming method. I used it for the sake of easy understanding. Use any other name(s) which is very hard to predict.
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**Encrypt/decrypt multiple files
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**
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Now we will encrypt two files with two separate passphrases for each one.
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```
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./toplip -alt file1 file2 > file3.encrypted
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```
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You will be asked to enter passphrase for each file. Use different
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passphrases.
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Sample output of the above command will be:
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```
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This is toplip v1.20 (C) 2015, 2016 2 Ton Digital. Author: Jeff Marrison A showcase piece for the HeavyThing library. Commercial support available Proudly made in Cooroy, Australia. More info: https://2ton.com.au/toplip
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**file2 Passphrase #1** : generating keys...Done
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**file1 Passphrase #1** : generating keys...Done
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Encrypting...Done
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```
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What the above command will do is encrypt the contents of two files and save
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them in a single file called **file3.encrypted**. While restoring, just give
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the respective password. For example, if you give the passphrase of the file1,
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toplip will restore file1. If you enter the passphrase of file2, toplip will
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restore file2.
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Each **toplip** encrypted output may contain up to four wholly independent
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files, and each created with their own separate and unique passphrase. Due to
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the way the encrypted output is put together, there is no way to easily
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determine whether or not multiple files actually exist in the first place. By
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default, even if only one file is encrypted using toplip, random data is added
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automatically. If more than one file is specified, each with their own
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passphrase, then you can selectively extract each file independently and thus
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deny the existence of the other files altogether. This effectively allows a
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user to open an encrypted bundle with controlled exposure risk, and no
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computationally inexpensive way for an adversary to conclusively identify that
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additional confidential data exists. This is called **Plausible deniability**
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, one of the notable feature of toplip.
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To decrypt **file1** from **file3.encrypted** , just enter:
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```
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./toplip -d file3.encrypted > file1.encrypted
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```
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You will be prompted to enter the correct passphrase of file1.
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To decrypt **file2** from **file3.encrypted** , enter:
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```
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./toplip -d file3.encrypted > file2.encrypted
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```
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Do not forget to enter the correct passphrase of file2.
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**Use multiple passphrase protection**
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This is another cool feature that I admire. We can provide multiple
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passphrases for a single file when encrypting it. It will protect the
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passphrases against brute force attempts.
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```
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./toplip -c 2 file1 > file1.encrypted
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```
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Here, **-c 2** represents two different passphrases. Sample output of above
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command would be:
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```
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This is toplip v1.20 (C) 2015, 2016 2 Ton Digital. Author: Jeff Marrison A showcase piece for the HeavyThing library. Commercial support available Proudly made in Cooroy, Australia. More info: https://2ton.com.au/toplip
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**file1 Passphrase #1:** generating keys...Done
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**file1 Passphrase #2:** generating keys...Done
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Encrypting...Done
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```
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As you see in the above example, toplip prompted me to enter two passphrases.
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Please note that you must **provide two different passphrases** , not a single
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passphrase twice.
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To decrypt this file, do:
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```
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$ ./toplip -c 2 -d file1.encrypted > file1.decrypted
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This is toplip v1.20 (C) 2015, 2016 2 Ton Digital. Author: Jeff Marrison A showcase piece for the HeavyThing library. Commercial support available Proudly made in Cooroy, Australia. More info: https://2ton.com.au/toplip
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**file1.encrypted Passphrase #1:** generating keys...Done
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**file1.encrypted Passphrase #2:** generating keys...Done
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Decrypting...Done
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```
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**Hide files inside image**
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The practice of concealing a file, message, image, or video within another
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file is called **steganography**. Fortunately, this feature exists in toplip
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by default.
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To hide a file(s) inside images, use **-m** flag as shown below.
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```
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$ ./toplip -m image.png file1 > image1.png
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This is toplip v1.20 (C) 2015, 2016 2 Ton Digital. Author: Jeff Marrison A showcase piece for the HeavyThing library. Commercial support available Proudly made in Cooroy, Australia. More info: https://2ton.com.au/toplip
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file1 Passphrase #1: generating keys...Done
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Encrypting...Done
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```
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This command conceals the contents of file1 inside an image named image1.png.
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To decrypt it, run:
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```
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$ ./toplip -d image1.png > file1.decrypted This is toplip v1.20 (C) 2015, 2016 2 Ton Digital. Author: Jeff Marrison A showcase piece for the HeavyThing library. Commercial support available Proudly made in Cooroy, Australia. More info: https://2ton.com.au/toplip
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image1.png Passphrase #1: generating keys...Done
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Decrypting...Done
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```
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**Increase password complexity**
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To make things even harder to break, we can increase the password complexity
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like below.
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```
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./toplip -c 5 -i 0x8000 -alt file1 -c 10 -i 10 file2 > file3.encrypted
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```
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The above command will prompt to you enter 10 passphrases for the file1, 5
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passphrases for the file2 and encrypt both of them in a single file called
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"file3.encrypted". As you may noticed, we have used one more additional flag
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**-i** in this example. This is used to specify key derivation iterations.
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This option overrides the default iteration count of 1 for scrypt's initial
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and final PBKDF2 stages. Hexadecimal or decimal values permitted, e.g.
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**0x8000** , **10** , etc. Please note that this can dramatically increase the
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calculation times.
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To decrypt file1, use:
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```
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./toplip -c 5 -i 0x8000 -d file3.encrypted > file1.decrypted
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```
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To decrypt file2, use:
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```
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./toplip -c 10 -i 10 -d file3.encrypted > file2.decrypted
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```
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To know more about the underlying technical information and crypto methods
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used in toplip, refer its official website given at the end.
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My personal recommendation to all those who wants to protect their data. Don't
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rely on single method. Always use more than one tools/methods to encrypt
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files. Do not write passphrases/passwords in a paper and/or do not save them
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in your local or cloud storage. Just memorize them and destroy the notes. If
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you're poor at remembering passwords, consider to use any trustworthy password
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managers.
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And, that's all. More good stuffs to come. Stay tuned!
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Cheers!
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--------------------------------------------------------------------------------
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via: https://www.ostechnix.com/toplip-strong-file-encryption-decryption-cli-utility/
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作者：[SK][a]
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译者：[译者ID](https://github.com/译者ID)
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校对：[校对者ID](https://github.com/校对者ID)
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本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
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[a]:https://www.ostechnix.com/author/sk/
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[1]:https://www.ostechnix.com/cryptomator-open-source-client-side-encryption-tool-cloud/
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[2]:https://www.ostechnix.com/how-to-encrypt-your-personal-foldersdirectories-in-linux-mint-ubuntu-distros/
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[3]:https://www.ostechnix.com/cryptogo-easy-way-encrypt-password-protect-files/
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[4]:https://www.ostechnix.com/cryptr-simple-cli-utility-encrypt-decrypt-files/
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[5]:https://www.ostechnix.com/tomb-file-encryption-tool-protect-secret-files-linux/
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[6]:https://www.ostechnix.com/an-easy-way-to-encrypt-and-decrypt-files-from-commandline-in-linux/
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[7]:http://en.wikipedia.org/wiki/Advanced_Encryption_Standard
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[8]:http://en.wikipedia.org/wiki/Scrypt
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[9]:https://2ton.com.au/Products/
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[10]:https://www.ostechnix.com/wp-content/uploads/2017/12/toplip-2.png%201366w,%20https://www.ostechnix.com/wp-content/uploads/2017/12/toplip-2-300x157.png%20300w,%20https://www.ostechnix.com/wp-content/uploads/2017/12/toplip-2-768x403.png%20768w,%20https://www.ostechnix.com/wp-content/uploads/2017/12/toplip-2-1024x537.png%201024w
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[11]:http://www.ostechnix.com/wp-content/uploads/2017/12/toplip-2.png
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[12]:https://www.ostechnix.com/wp-content/uploads/2017/12/toplip-1.png%20779w,%20https://www.ostechnix.com/wp-content/uploads/2017/12/toplip-1-300x101.png%20300w,%20https://www.ostechnix.com/wp-content/uploads/2017/12/toplip-1-768x257.png%20768w
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[13]:http://www.ostechnix.com/wp-content/uploads/2017/12/toplip-1.png
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