Example to use jwt with rust 09.04.25

## Cargo.toml
```
jwt = {version ="*"}
hmac = {version ="*"}
sha2 = {version ="*"}

```

## Call from main
```
    let token = encode_token().await;
    let token_message = auth_token(token).await;
```

## Lib 
```
use hmac::{Hmac, Mac};                                                                                                                              
use jwt::{SignWithKey, VerifyWithKey};                                                                                                              
use serde::{Deserialize, Serialize};                                                                                                                
use sha2::Sha256;                                                                                                                                   
use std::collections::BTreeMap;                                                                                                                     
use std::time::{SystemTime, UNIX_EPOCH};                                                                                                            
                                                                                                                                                    
#[derive(Debug, Serialize, Deserialize)]                                                                                                            
struct Claims { 1 implementation
    sub: String,
    company: String,
}

pub async fn encode_token() -> String {
    let mut token = "".to_string();
    let key: Hmac<Sha256> = Hmac::new_from_slice(b"some-secret").unwrap();
    //let mut claims = BTreeMap::new();                                                                                                             
    let mut claims = BTreeMap::<&str, &str>::new();
    let _unixtime = SystemTime::now()
        .duration_since(UNIX_EPOCH)
        .unwrap()
        .as_secs()
        + (60 * 60 * 24 * 365);
    let unixtime = &_unixtime.to_string();
    claims.insert("u", "someone");
    claims.insert("e", unixtime);
    token = claims.sign_with_key(&key).unwrap();
    return token;
}

pub async fn auth_token(token: String) -> bool {
    //println!("{}", token);                                                                                                                        
    let mut r = false;
    let unix_now = SystemTime::now()
        .duration_since(UNIX_EPOCH)
        .unwrap()
        .as_secs();
    let key: Hmac<Sha256> = Hmac::new_from_slice(b"some-secret").unwrap();
    let _claims: Result<BTreeMap<String, String>, jwt::Error> = token.verify_with_key(&key);
    if _claims.is_ok() {
        let claims = _claims.unwrap();
        let _unix_expire: Result<String, _> = claims["e"].parse();
        if _unix_expire.is_ok() {
            let unix_expire: u64 = _unix_expire.unwrap().parse().unwrap();
            if unix_expire >= unix_now {
                println!("{}(expire time) >= {}(time now)", unix_expire, unix_now);
                r = true;
            }
        }
    }
    return r;
}

```

https://docs.rs/jwt/latest/jwt/

Anonymous

## more Error protected
```
    let token = encode_token().await;
    let is_auth = auth_token(&token.unwrap()).await.unwrap();
    println!("{}", is_auth);
```

```
use hmac::{Hmac, Mac};
use jwt::{SignWithKey, VerifyWithKey};
use serde::{Deserialize, Serialize};
use sha2::Sha256;
use std::collections::BTreeMap;
use std::error::Error;
use std::time::{SystemTime, UNIX_EPOCH};

#[derive(Debug, Serialize, Deserialize)]
struct Claims {
    sub: String,
    company: String,
}

pub async fn encode_token() -> Result<String, Box<dyn Error>> {
    let mut token = "".to_string();
    let key: Hmac<Sha256> = Hmac::new_from_slice(b"secret-dinglogs")?;
    //let mut claims = BTreeMap::new();
    let mut claims = BTreeMap::<&str, &str>::new();
    let _unixtime = SystemTime::now()
        .duration_since(UNIX_EPOCH)
        .unwrap()
        .as_secs()
        + (60 * 60 * 24 * 365);
    let unixtime = &_unixtime.to_string();
    claims.insert("u", "someone");
    claims.insert("e", unixtime);
    token = claims.sign_with_key(&key)?;

Ok(token)
}

pub async fn auth_token(token: &str) -> Result<bool, Box<dyn Error>> {
    //println!("{}", token);
    let mut r = false;
    let unix_now = SystemTime::now()
        .duration_since(UNIX_EPOCH)
        .unwrap()
        .as_secs();
    let key: Hmac<Sha256> = Hmac::new_from_slice(b"secret-dinglogs").unwrap();
    let _claims: Result<BTreeMap<String, String>, jwt::Error> = token.verify_with_key(&key);
    if _claims.is_ok() {
        let claims = _claims.unwrap();
        let _unix_expire: Result<String, _> = claims["e"].parse();
        if _unix_expire.is_ok() {
            let unix_expire: u64 = _unix_expire.unwrap().parse().unwrap();
            if unix_expire >= unix_now {
                //println!("{}(expire time) >= {}(time now)", unix_expire, unix_now);
                r = true;
            }
        }
    }
    Ok(r)
}

```

09.04.25

Anonymous

Example to use jwt with rust 09.04.25

Information Epoch 1793782809