AesFileCryptor

Utility for encrypting and decrypting files with symmetric cipher (AES). Requires .NET Framework >= 4.6.1.

Help

Parameter	Description
--file	Required. Path of the file we want to encrypt or decrypt.
--output	Required. Select file path where encrypted or decrypted file will be saved.
--save-key	Select file path, where newly generated key will be saved.
--with-key	Select file path of existing key.
--encrypt	Encryption is turned off, select this option if you want to encrypt.
--decrypt	Decryption is turned off, select this option if you want to decrypt.
--help	Display this help screen.
--version	Display version information.

Usage examples

Encrypt file:

   AesFileCryptor --encrypt --file=somefile --output=encryptedfile --save-key=keyfile

Encrypt file with existing key:

   AesFileCryptor --encrypt --file=somefile --output=encryptedfile --with-key=keyfile

Decrypt file with existing key:

   AesFileCryptor --decrypt --file=encryptedfile --output=somefile --with-key=keyfile

Implementation details

• Key size is 256 bits
• Mode is CBC
• Padding is PKC7

Key file structure

Generated key file is simple textfile where

• First line contains key in Base64 encoding
• Second line contains initialization vector in Base64 encoding