View Source Plug.Crypto.MessageEncryptor (Plug.Crypto v2.0.0)
MessageEncryptor
is a simple way to encrypt values which get stored
somewhere you don't trust.
The encrypted key, initialization vector, cipher text, and cipher tag are base64url encoded and returned to you.
This can be used in situations similar to the Plug.Crypto.MessageVerifier
,
but where you don't want users to be able to determine the value of the payload.
The current algorithm used is XChaCha20-Poly1305.
Example
iex> secret_key_base = "072d1e0157c008193fe48a670cce031faa4e..."
...> encrypted_cookie_salt = "encrypted cookie"
...> secret = KeyGenerator.generate(secret_key_base, encrypted_cookie_salt)
...>
...> data = "José"
...> encrypted = MessageEncryptor.encrypt(data, secret, "UNUSED")
...> MessageEncryptor.decrypt(encrypted, secret, "UNUSED")
{:ok, "José"}
Summary
Functions
Decrypts a message using authenticated encryption.
Encrypts a message using authenticated encryption.
Functions
Decrypts a message using authenticated encryption.
Encrypts a message using authenticated encryption.
The sign_secret
is currently only used on decryption
for backwards compatibility.
A custom authentication message can be provided. It defaults to "A128GCM" for backwards compatibility.