Function crypto_aead_chacha20poly1305_ietf_decrypt_detached 

pub fn crypto_aead_chacha20poly1305_ietf_decrypt_detached(
    message: &mut [u8],
    ciphertext: &[u8],
    mac: &Mac,
    associated_data: Option<&[u8]>,
    nonce: &Nonce,
    key: &Key,
) -> Result<(), Error>

Detached version of crypto_aead_chacha20poly1305_ietf_decrypt.

Compatible with libsodium’s crypto_aead_chacha20poly1305_ietf_decrypt_detached.

Errors

Returns an error if ciphertext is too long, message.len() does not equal ciphertext.len(), or authentication fails.