AES Encryptor/Decryptor tool

Base algorithm: AES256
Mode: CBC
IV length: 16 bytes (generated randomly under the hood)
Key length: 32 bytes

Header of encrypted payload:

Magic Number (0xDEADBEEF) : 4 bytes
Plain text size           : 4 bytes
Checksum(CRC32)           : 4 bytes
IV                        : 16 bytes

Tested environmet

Ubuntu 20.04.1 LTS

Depencies

build-essential
libssl-dev

Build

all                  to assembly binaries
help                 display help information
clean                remove build arifacts

Usage

./main [encrypt/decrypt] input.bin output.bin key

Encrypt: ./main encrypt input.bin output.bin 01234567890123456789012345678901
Decrypt: ./main decrypt input.bin output.bin 01234567890123456789012345678901