feature: Cleaned up jwt auth, and added header auth

internal/httpservers/restapi_auth_jwt.go

@@ -0,0 +1,68 @@
+package httpservers;
+
+import (
+	"github.com/golang-jwt/jwt/v4"
+	"fmt"
+	log "github.com/sirupsen/logrus"
+	"errors"
+	"net/http"
+)
+
+func parseJwtToken(cookieValue string) (*jwt.Token, error) {
+	return jwt.Parse(cookieValue, 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"])
+		}
+
+		// hmacSampleSecret is a []byte containing your secret, e.g. []byte("my_secret_key")
+		return []byte(cfg.AuthJwtSecret), nil
+	})
+}
+
+func getClaimsFromJwtToken(cookieValue string) (jwt.MapClaims, error) {
+	token, err := parseJwtToken(cookieValue)
+
+	if err != nil {
+		log.Errorf("jwt parse failure: %v", err)
+		return nil, errors.New("jwt parse failure")
+	}
+
+	if claims, ok := token.Claims.(jwt.MapClaims); ok && token.Valid {
+		return claims, nil
+	} else {
+		return nil, errors.New("jwt token isn't valid")
+	}
+}
+
+func lookupClaimValueOrDefault(claims jwt.MapClaims, key string, def string) string {
+	if val, ok := claims[key]; ok {
+		return fmt.Sprintf("%s", val)
+	} else {
+		return def
+	}
+}
+
+func parseJwtCookie(request *http.Request) (string, string) {
+	cookie, err := request.Cookie(cfg.AuthJwtCookieName)
+
+	if err != nil {
+		log.Debugf("jwt cookie check %v name: %v", err, cfg.AuthJwtCookieName)
+		return "", ""
+	}
+
+	claims, err := getClaimsFromJwtToken(cookie.Value)
+
+	log.Debugf("jwt claims data: %+v", claims)
+
+	if err != nil {
+		log.Warnf("jwt claim error: %+v", err)
+		return "", ""
+	}
+
+	username := lookupClaimValueOrDefault(claims, cfg.AuthJwtClaimUsername, "")
+	usergroup := lookupClaimValueOrDefault(claims, cfg.AuthJwtClaimUserGroup, "")
+
+	return username, usergroup
+}
+