Function rust_sodium::crypto::secretbox::xsalsa20poly1305::open

pub fn open(c: &[u8], Nonce: &Nonce, Key: &Key) -> Result<Vec<u8>, ()>

open() verifies and decrypts a ciphertext c using a secret key k and a nonce n. It returns a plaintext Ok(m). If the ciphertext fails verification, open() returns Err(()).