gm-sm4

A Pure Rust High-Performance Implementation of China's Standards of Encryption Algorithms SM4

Example

```rust use crate::Sm4Cipher; use hex_literal::hex;

fn main() { let key = hex!("0123456789abcdeffedcba9876543210"); let plaintext = key.clone(); let ciphertext = hex!("681edf34d206965e86b3e94f536e4246");

let cipher = Sm4Cipher::new(&key).unwrap();

let enc = cipher.encrypt(&plaintext).unwrap();
assert_eq!(&ciphertext, enc.as_slice());

}

```