pub trait Aead: AeadCore {
fn encrypt<'msg, 'aad>(
&self,
nonce: &Nonce<Self>,
plaintext: impl Into<Payload<'msg, 'aad>>
) -> Result<Vec<u8>>;
fn decrypt<'msg, 'aad>(
&self,
nonce: &Nonce<Self>,
ciphertext: impl Into<Payload<'msg, 'aad>>
) -> Result<Vec<u8>>;
}Expand description
Authenticated Encryption with Associated Data (AEAD) algorithm.
This trait is intended for use with stateless AEAD algorithms. The
AeadMut trait provides a stateful interface.
Required Methods
Encrypt the given plaintext payload, and return the resulting ciphertext as a vector of bytes.
The Payload type can be used to provide Additional Associated Data
(AAD) along with the message: this is an optional bytestring which is
not encrypted, but is authenticated along with the message. Failure
to pass the same AAD that was used during encryption will cause
decryption to fail, which is useful if you would like to “bind” the
ciphertext to some other identifier, like a digital signature key
or other identifier.
If you don’t care about AAD and just want to encrypt a plaintext
message, &[u8] will automatically be coerced into a Payload:
let plaintext = b"Top secret message, handle with care";
let ciphertext = cipher.encrypt(nonce, plaintext);The default implementation assumes a postfix tag (ala AES-GCM,
AES-GCM-SIV, ChaCha20Poly1305). Aead implementations which do not
use a postfix tag will need to override this to correctly assemble the
ciphertext message.
Decrypt the given ciphertext slice, and return the resulting plaintext as a vector of bytes.
See notes on Aead::encrypt() about allowable message payloads and
Associated Additional Data (AAD).
If you have no AAD, you can call this as follows:
let ciphertext = b"...";
let plaintext = cipher.decrypt(nonce, ciphertext)?;The default implementation assumes a postfix tag (ala AES-GCM,
AES-GCM-SIV, ChaCha20Poly1305). Aead implementations which do not
use a postfix tag will need to override this to correctly parse the
ciphertext message.