golang JWT(Json Web Tocken)

青旅半醒 2022-05-31 00:22 190阅读 0赞

什么是JWT,相信大家都熟悉了，我直接上代码了，有不懂的地方直接参考[什么是JWT][JWT]

package main
    
    import (
        "crypto/hmac"
        "crypto/sha256"
        "encoding/base64"
        "github.com/dgrijalva/jwt-go"
        "fmt"
        "strconv"
        "time"
    )
     //req.Header.Set("Authorization", fmt.Sprintf("Bearer %v", token))
    
    func main() {
       //fmt.Println(ComputeHmac256("Message", "secret"))
        tokenString := "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiYWRtaW4iOnRydWV9.TJVA95OrM7E2cBab30RMHrHDcEfxjoYZgeFONFh7HgQ"
        hmacSecret := []byte("secret")
        ParseHmac(tokenString, hmacSecret)
    
    }
     NewHmac creating, signing, and encoding a JWT token using the HMAC signing method //func NewHmac() { // // Create a new token object, specifying signing method and the claims // // you would like it to contain. // token := jwt.NewWithClaims(jwt.SigningMethodHS256, jwt.MapClaims{ // "foo": "bar", // "nbf": time.Date(2015, 10, 10, 12, 0, 0, 0, time.UTC).Unix(), // }) // // // Sign and get the complete encoded token as a string using the secret // tokenString, err := token.SignedString(hmacSampleSecret) // // fmt.Println(tokenString, err) // // Output: eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJmb28iOiJiYXIiLCJuYmYiOjE0NDQ0Nzg0MDB9.u1riaD1rW97opCoAuRCTy4w58Br-Zk-bh7vLiRIsrpU <nil> //}
     // ParseHmac parsing and validating a token using the HMAC signing method
    func ParseHmac(tokenString string, hmacSecret []byte) bool {
    
       // Parse takes the token string and a function for looking up the key. The latter is especially
       // useful if you use multiple keys for your application. The standard is to use 'kid' in the
       // head of the token to identify which key to use, but the parsed token (head and claims) is provided
       // to the callback, providing flexibility.
        token, err := jwt.Parse(tokenString, func(token *jwt.Token) (interface{}, error) {
           // Don't forget to validate the alg is what you expect:
            if _, ok := token.Method.(*jwt.SigningMethodHMAC); !ok {
                return nil, fmt.Errorf("Unexpected signing method: %v", token.Header["alg"])
            }
    
           // hmacSecret is a []byte containing your secret, e.g. []byte("my_secret_key")
            return hmacSecret, nil
        })
    
        fmt.Printf("alg=[%s]\n", token.Header["alg"])
    
        if claims, ok := token.Claims.(jwt.MapClaims); ok && token.Valid {
    
            fmt.Println(claims["sub"], claims["name"], claims["admin"])
    
            sub, _ := strconv.ParseInt(fmt.Sprintf("%s", claims["sub"]), 10, 64)
    
            now, _ := strconv.ParseInt(fmt.Sprintf("%s", time.Now()), 10, 64)
    
            if now-sub > 0 {
                return true
            }
    
            fmt.Printf("Error The Tocken is lose efficacy:%v\n", token)
    
            return false
    
        }
    
        fmt.Println("Error token is error=", err)
    
        return false
    
    }

[JWT]: http://blog.csdn.net/qq_21816375/article/details/79226980