initial commit

controllers/tokens.go

@@ -0,0 +1,68 @@
+package controllers
+
+import (
+	"errors"
+	"time"
+
+	"github.com/beego/beego/v2/core/logs"
+	"github.com/dgrijalva/jwt-go"
+)
+
+const mySuperSecretKey = "jdnfksdmfksd"
+
+func CreateToken(userId string) (string, error) {
+	var err error
+	//Creating Access Token
+	// os.Setenv("ACCESS_SECRET", "jdnfksdmfksd") //this should be in an env file
+	atClaims := jwt.MapClaims{}
+	atClaims["authorized"] = true
+	atClaims["user_id"] = userId
+	atClaims["exp"] = time.Now().UTC().Add(time.Hour * 15).Unix()
+	at := jwt.NewWithClaims(jwt.SigningMethodHS256, atClaims)
+	token, err := at.SignedString([]byte(mySuperSecretKey))
+	if err != nil {
+		return "", err
+	}
+	return token, nil
+}
+
+func IsValidToken(jwtToken string) (*jwt.Token, error) {
+	token, err := jwt.Parse(jwtToken, func(token *jwt.Token) (interface{}, error) {
+		//TODO: Validate expected algorithm
+		return []byte(mySuperSecretKey), nil
+	})
+
+	var message string
+
+	if err == nil && token.Valid {
+		return token, nil
+	} else if ve, ok := err.(*jwt.ValidationError); ok {
+		if ve.Errors&jwt.ValidationErrorMalformed != 0 {
+			message = "Token " + jwtToken + " is not even a token"
+		} else if ve.Errors&(jwt.ValidationErrorExpired|jwt.ValidationErrorNotValidYet) != 0 {
+			message = "Token is either expired or not active yet"
+		} else {
+			message = "Couldn't handle this token: " + err.Error()
+		}
+	}
+
+	logs.Debug(message)
+	return nil, errors.New(message)
+}
+
+func GetUsernameFromToken(token string) (string, error) {
+
+	tokenObj, err := IsValidToken(token)
+	if err != nil {
+		logs.Debug(err)
+		return "", err
+	}
+
+	if claims, ok := tokenObj.Claims.(jwt.MapClaims); ok {
+		return claims["user_id"].(string), nil
+	}
+
+	logs.Debug("Unknow JWT error")
+	return "", errors.New("Unknow JWT error")
+
+}