cryptofile aes-256-cbc mode encryption/decryption file

Random initialization vector (iv).

Randon padding data.

usage: cryptofile {enc | dec} <key> <in_file> <out_file>

<key> 256 bit key in 64 bytes hex format.

To generate key you can use hard time and memory key derivation function such as argon2:

echo -n "some-strong-password" | argon2 some-salt -t 20 -m 20 -r > ./key.txt

Then encrypt:

cryptofile enc `cat ./key.txt` somefile.txt somefile.txt.enc

And decrypt:

cryptofile dec `cat ./key.txt` somefile.txt.enc somefile.txt.enc.dec

Then somefile.txt and somefile.txt.enc.dec should be the same.

PS: When you use argon2 to generate key from password remeber to remeber ;) or save not only password but salt and other parameters too.

github.com/pawplo/cryptofile

aes.c and aes.h files from github.com/kokke/tiny-AES-c