Function orion::default::chacha20_encrypt[−][src]

pub fn chacha20_encrypt(
    key: &[u8], 
    plaintext: &[u8]
) -> Result<Vec<u8>, UnknownCryptoError>

IETF ChaCha20 encryption.

About:

  • The nonce is automatically generated
  • Returns a vector where the first 12 bytes are the nonce and the rest is the ciphertext
  • The initial counter is set to 0

Parameters:

  • plaintext: The data to be encrypted
  • key: The secret key used to encrypt the plaintext

Security:

This does not provide any data integrity. If you need data integrity, you should be using a ChaCha20_Poly1305 construct instead. In most cases you would want data integrity. See RFC for more information.

Exceptions:

An exception will be thrown if:

  • key is not 32 bytes
  • plaintext is empty
  • plaintext is longer than (2^32)-2

Example:

use orion::default;
use orion::utilities::util;

let mut key = [0u8; 32]; // Replace this with the key used for encryption
util::gen_rand_key(&mut key).unwrap();

let encrypted_data = default::chacha20_encrypt(&key, "Secret message".as_bytes()).unwrap();