Trait StreamCipher 

pub trait StreamCipher {
    const KEY_SIZE: usize;
    const NONCE_SIZE: usize;
    const BLOCK_SIZE: usize;

    // Required methods
    fn process(&mut self, data: &mut [u8]) -> Result<()>;
    fn keystream(&mut self, output: &mut [u8]) -> Result<()>;
    fn reset(&mut self) -> Result<()>;
    fn seek(&mut self, position: u64) -> Result<()>;

    // Provided methods
    fn encrypt(&mut self, data: &mut [u8]) -> Result<()> { ... }
    fn decrypt(&mut self, data: &mut [u8]) -> Result<()> { ... }
}

Common trait for stream cipher implementations

Required Associated Constants

const KEY_SIZE: usize

The key size in bytes

const NONCE_SIZE: usize

The nonce size in bytes

const BLOCK_SIZE: usize

The internal block size in bytes (if applicable)

Required Methods

fn process(&mut self, data: &mut [u8]) -> Result<()>

Process data in place (encrypts for encryption, decrypts for decryption)

fn keystream(&mut self, output: &mut [u8]) -> Result<()>

Generate keystream directly into an output buffer

fn reset(&mut self) -> Result<()>

Reset the cipher to its initial state

fn seek(&mut self, position: u64) -> Result<()>

Seek to a specific position in the keystream (if supported)

Provided Methods

fn encrypt(&mut self, data: &mut [u8]) -> Result<()>

Encrypt data in place

fn decrypt(&mut self, data: &mut [u8]) -> Result<()>

Decrypt data in place

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors

impl StreamCipher for ChaCha20

const KEY_SIZE: usize = 32usize

const NONCE_SIZE: usize = 12usize

const BLOCK_SIZE: usize = 64usize