Struct Sm4Cipher 

pub struct Sm4Cipher { /* private fields */ }

SM4 cipher with pre-computed round keys.

Sm4Cipher zeroizes its round-key buffer on drop via the workspace zeroize policy. Construction runs the key schedule (32 round keys × secret-key-touching S-box invocations); see the W1 dudect target ct_sm4_key_schedule.

Implementations

impl Sm4Cipher

pub fn new(key: &[u8; 16]) -> Self

Construct a cipher from a 128-bit key and run the key schedule.

pub fn encrypt_block(&self, block: &mut [u8; 16])

Encrypt one 16-byte block in place.

pub fn decrypt_block(&self, block: &mut [u8; 16])

Decrypt one 16-byte block in place.

Trait Implementations

impl BlockCipher for Sm4Cipher

fn new(key: &[u8]) -> Self

Construct from a key slice. key.len() must equal KEY_SIZE.

Panics

Panics if key.len() != KEY_SIZE.

fn encrypt_block(&self, block: &mut [u8])

Encrypt one 16-byte block in place.

Panics

Panics if block.len() != BLOCK_SIZE.

fn decrypt_block(&self, block: &mut [u8])

Decrypt one 16-byte block in place.

Panics

Panics if block.len() != BLOCK_SIZE.

const BLOCK_SIZE: usize = BLOCK_SIZE

Block size in bytes (e.g. 16 for SM4).

impl Clone for Sm4Cipher

fn clone(&self) -> Sm4Cipher

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Drop for Sm4Cipher

fn drop(&mut self)

Executes the destructor for this type.

fn pin_drop(self: Pin<&mut Self>)

🔬This is a nightly-only experimental API. (pin_ergonomics)

Execute the destructor for this type, but different to Drop::drop, it requires self to be pinned.

impl Zeroize for Sm4Cipher

fn zeroize(&mut self)

Zero out this object from memory using Rust intrinsics which ensure the zeroization operation is not “optimized away” by the compiler.