Fialka.net

Console application showcasing symmetric crypto in .NET Core 3.0. The name is a homage to Fialka (ФИАЛКА), russian crypto machine used by Warszaw Pact countries, including Czechoslovakia, in second half of 20th century.

Please note: This application is not intended to be used for real-world production security applications. It's intended to be a teaching tool, showcasing how to perform some tasks in .NET Core 3.0.

Features

• Encrypt or decrypt any file using AES-GCM.
• Use raw key from keyfile (may be generated randomly).
• Generate encryption key from password using PBKDF2.
• The encrypted data structure is JSON, so open to various tinkering and demo of attacks.
• Uses the new System.Text.Json API.
• Commandline application using the McMaster.Extensions.CommandLineUtils library.

Usage

Encrypt a file

fialka encrypt [options] <infile>

Argument	Meaning
infile	Input file name
-o <outfile>	Output file name (default <infile>.fjd)
-a <string>	Additional authenticated data
-p <password>	Encryption password
-i <number>	Number of PBKDF2 password iterations (default 10000)
-s <bits>	Length of PBKDF2 password salt (default 256)
-k <keyfile>	Encryption key file name
-l <bits>	Length of generated or derived key (128 or 256, default 256)
-f	Force overwrite key file

Decrypt a file

fialka decrypt [options] <infile>

Argument	Meaning
infile	Input file name
-o <outfile>	Output file name (default <infile> without extension)
-p <password>	Decryption password
-k <keyfile>	Decryption key file name

Contributor Code of Conduct

This project adheres to No Code of Conduct. We are all adults. We accept anyone's contributions. Nothing else matters.

For more information please visit the No Code of Conduct homepage.