gmsm is an open source pure rust library of China Cryptographic Algorithm Standards.
```rust
let hashstr = sm3hex("abc");
// hex_str is "66C7F0F462EEEDD9D1F2D46BDC10E4E24167C4875CF2F7A2297DA02B8F4BA8E0";
```
gmsm is currently under the Apache 2.0 license.