go jwt use

go jwt encryption and decryption

package mainimport ("errors""fmt""github.com/golang-jwt/jwt""log""time")//Custom encrypted structure data needs to implement the jwt.StandardClaims methodtype Test struct{Name string `json:"name"`Context string `json:"context"`jwt.StandardClaims}var SignKey = []byte("1123654gfdhgfd")func main() {a := Test{Name: "v_6556u",Context: "Hahaha",StandardClaims: jwt.StandardClaims{NotBefore: time.Now().Unix() , // start effective timeExpiresAt: time.Now().Unix() + 20 ,// Expiration time (expires after 5 seconds)Issuer:"xuzhi",//issuer},}//jwt.NewWithClaims generates token//jwt.SigningMethodHS256 encryption methodtoken := jwt.NewWithClaims(jwt.SigningMethodHS256, a)//Use custom body atokenString, err := token.SignedString(SignKey)if err != nil {fmt.Println("error")log.Println(err.Error())return}fmt.Println("Encrypted token string:", tokenString)// decrypts,err := ParseToken(tokenString)if err != nil {log.Panicln(err.Error())}fmt.Println("Decryption: ",s)fmt.Println("=========================================")tokenA := jwt.NewWithClaims(jwt.SigningMethodHS256, jwt.MapClaims{//The built-in jwt.MapClaims"name": "Master Secretary","content":"asdfg","exp": time.Now().Unix(),"iss": "lisa",})//token.SignedString converts token to stringtokenStringA, err := tokenA.SignedString(SignKey)if err != nil {fmt.Println("error")log.Println(err.Error())return}fmt.Println("encrypted token string", tokenStringA)//If jwt.ParseWithClaims is also used here, the second parameter is written jwt.MapClaims{}//For example jwt.ParseWithClaims(tokenString, jwt.MapClaims{},func(t *jwt.Token) (interface{}, error){}fmt.Println(jwt_decode(tokenStringA, SignKey))}//Decrypt the built-in jwt.MapClaimsfunc jwt_decode(token string, SignKey []byte)map[string]interface{}{token_decode, err := jwt.Parse(token, func(t *jwt.Token) (interface{}, error) {return SignKey, nil})if err != nil {log.Fatalln(err.Error())}return token_decode.Claims.(jwt.MapClaims)}// ParseToken parses JWTfunc ParseToken(tokenString string) (*Test, error) {// Parse tokentoken, err := jwt.ParseWithClaims(tokenString, &Test{}, func(token *jwt.Token) (i interface{}, err error) {return SignKey, nil})if err != nil {return nil, err}// token is validif claims, ok := token.Claims.(*Test); ok && token.Valid { // Validate tokenreturn claims, nil}return nil, errors.New("invalid token")}