gm-sm2

A Pure Rust High-Performance Implementation of China's Standards of Encryption Algorithms SM2

Example

encrypt & decrypt

```rust use crate::key::{gen_keypair, CompressModle};

fn main() { let (pk, sk) = genkeypair(CompressModle::Compressed).unwrap(); let msg = "你好 world,asjdkajhdjadahkubbhj12893718927391873891,@@！！ world,1231 wo12321321313asdadadahello world，hello world".asbytes(); let encrypt = pk.encrypt(msg).unwrap(); let plain = sk.decrypt(&encrypt).unwrap(); assert_eq!(msg, plain) }

```

sign & verify

```rust use crate::signature;

fn main() { let msg = b"hello"; let (pk, sk) = gen_keypair(CompressModle::Compressed).unwrap(); let signature = sk.sign(None, msg).unwrap(); pk.verify(None, msg, &signature).unwrap() }

```

key exchange

```rust use crate::exchange::Exchange;

fn main() { let ida = "alice123@qq.com"; let idb = "bob456@qq.com";

let (pk_a, sk_a) = gen_keypair(CompressModle::Compressed).unwrap();
let (pk_b, sk_b) = gen_keypair(CompressModle::Compressed).unwrap();

let mut user_a = Exchange::new(8, Some(id_a), &pk_a, &sk_a, Some(id_b), &pk_b).unwrap();
let mut user_b = Exchange::new(8, Some(id_b), &pk_b, &sk_b, Some(id_a), &pk_a).unwrap();

let ra_point = user_a.exchange_1().unwrap();
let (rb_point, sb) = user_b.exchange_2(&ra_point).unwrap();
let sa = user_a.exchange_3(&rb_point, sb).unwrap();
let succ = user_b.exchange_4(sa, &ra_point).unwrap();
println!("test_key_exchange = {}", succ);
assert_eq!(user_a.k, user_b.k);

}

```

Reference

libsm