HMAC
Last modified: 2023-02-10
An HMAC is a specific type of message authentication code involving a cryptographic hash function and a secret cryptographic key.
Install HMAC Commands
If you don’t have hmac256 command, you need to install the package.
# In debian
sudo apt install libgcrypt20-dev
Decrypt
# HMAC
hmac256 <secret_key> example.txt
# HMAC-SHA256
sha256hmac example.txt --key <secret_key>
# HMAC-SHA384
sha384hmac example.txt --key <secret_key>
# HMAC-SHA512
sha512hmac example.txt --key <secret_key>