sm9 0.4.0

SM9 (OSCCA GM/T 0044-2016), identity-based cryptography
Documentation 
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use sm9::*;
use std::fs;

#[test]
fn test_encrypt_decrypt() {
    // SM9 identity-based cryptographic algorithms
    // Part 5: Parameter definition
    // Annex D: Example of public key encryption
    let usr_id = b"Bob";
    let txt = b"Chinese IBE standard";
    let m = Sm9::encrypt("master_public_key.pem", usr_id, txt);
    println!("{:02X?}", m);

    let msg = Sm9::decrypt("bob_private_key.pem", usr_id, m).expect("decrypt error");
    println!("{:02X?}", msg);
    assert_eq!(msg.len(), txt.len());
    assert_eq!(txt, msg.as_slice());
}
#[test]
fn test_encrypt_decrypt2() {
    // SM9 identity-based cryptographic algorithms
    // Part 5: Parameter definition
    // Annex D: Example of public key encryption
    let usr_id = b"Bob";
    let txt = b"Chinese IBE standard";
    let master_public_key =
        fs::read_to_string("master_public_key.pem").expect("read master_public_key.pem error");
    let m = Sm9::encrypt2(&master_public_key, usr_id, txt);
    println!("{:02X?}", m);

    let bob_private_key =
        fs::read_to_string("bob_private_key.pem").expect("read bob_private_key.pem error");
    let msg = Sm9::decrypt2(&bob_private_key, usr_id, m).expect("decrypt error");
    println!("{:02X?}", msg);
    assert_eq!(msg.len(), txt.len());
    assert_eq!(txt, msg.as_slice());
}