chore: fix some validation issues

internal/server/api/api.go

@@ -26,7 +26,7 @@ func Kickoff(logger *slog.Logger, env bootstrap.Environment, db *gorm.DB) {
 
 	if env.Authentication {
 		slog.Debug("injecting authentication middleware") // only log when actually doign the thing it logs to do
-		r.Use(middleware.AuthMiddleware())
+		r.Use(middleware.AuthMiddleware(db))
 	}
 
 	api := r.Group("/api")

internal/server/api/assets/response.go

@@ -1,7 +1,6 @@
 package assets
 
 import (
-	"fmt"
 	"net/http"
 	"time"
 
@@ -50,27 +49,12 @@ func FileDownloadResponse(c *gin.Context, fp string) {
 	c.File(fp)
 }
 
-func BasicResponse(c *gin.Context, data ...any) {
-	fmt.Println(len(data))
-	switch len(data) {
-	case 0:
-		// empty slice so just an ok message
-		c.JSON(http.StatusOK, ResponseObject{
-			Msg: OkMes,
-		})
+func BasicResponse(c *gin.Context, data any) {
 	// single object in our slice (even if the object itself is a slice)
-	case 1:
-		c.JSON(http.StatusOK, ResponseObject{
-			Msg:  OkMes,
-			Data: data[0],
-		})
-	// multiple objects inside our slice
-	default:
-		c.JSON(http.StatusOK, ResponseObject{
-			Msg:  OkMes,
-			Data: data,
-		})
-	}
+	c.JSON(http.StatusOK, ResponseObject{
+		Msg:  OkMes,
+		Data: data,
+	})
 }
 
 func CreationResponse(c *gin.Context, data any) {

internal/server/api/middleware/middleware.go

@@ -4,10 +4,13 @@ import (
 	"log/slog"
 	"net/http"
 	"orbits-server/internal/server/api/assets"
+	"orbits-server/internal/server/service"
+	"orbits-server/internal/shared/security"
 	"strings"
 	"time"
 
 	"github.com/gin-gonic/gin"
+	"gorm.io/gorm"
 )
 
 func SlogMiddleware(logger *slog.Logger) gin.HandlerFunc {
@@ -38,7 +41,9 @@ func SlogMiddleware(logger *slog.Logger) gin.HandlerFunc {
 	}
 }
 
-func AuthMiddleware() gin.HandlerFunc {
+func AuthMiddleware(db *gorm.DB) gin.HandlerFunc {
+	keyService := service.NewKeyService(db)
+
 	return func(c *gin.Context) {
 		authorizationHeader := c.GetHeader("Authorization")
 		if len(authorizationHeader) == 0 {
@@ -58,6 +63,22 @@ func AuthMiddleware() gin.HandlerFunc {
 			return
 		}
 
-		//givenKey := headerParts[1]
+		candidateKey := headerParts[1]
+		storedKeys, err := keyService.ListValidKeyHashes()
+		if err != nil {
+			slog.Error("failed to retrieve key hashes", "error", err)
+			assets.InternalErrorResponse(c)
+		}
+
+		for _, key := range storedKeys {
+			if match := security.CompareKey(key, candidateKey); match {
+				c.Next()
+				return
+			}
+		}
+
+		c.AbortWithStatusJSON(http.StatusUnauthorized, assets.ResponseObject{
+			Msg: "invalid key",
+		})
 	}
 }

internal/server/service/keyservice.go

@@ -23,6 +23,20 @@ func NewKeyService(db *gorm.DB) *KeyService {
 	}
 }
 
+func (s *KeyService) ListValidKeyHashes() ([]string, error) {
+	keyRecords, err := database.ListKeys(s.db)
+	if err != nil {
+		return nil, err
+	}
+
+	hashList := make([]string, 0, len(keyRecords))
+	for _, k := range keyRecords {
+		hashList = append(hashList, k.KeyHash)
+	}
+
+	return hashList, nil
+}
+
 func (s *KeyService) Create(name string, expiresAt time.Time) (assets.KeyResponse, error) {
 	keyContent := security.GenerateChars(accessKeyLen)
 

internal/shared/security/hash.go

@@ -30,6 +30,7 @@ func HashFileReader(r io.Reader) (string, error) {
 	return base64.StdEncoding.EncodeToString(h.Sum(nil)), nil
 }
 
+// we use argon2 for key hashing - since it won the key encryption "war"
 func HashKey(key string) (string, error) {
 	salt := make([]byte, argonSaltLen)
 	rand.Read(salt)
@@ -46,8 +47,8 @@ func HashKey(key string) (string, error) {
 	return encoded, nil
 }
 
-func CompareKey(key, candidate string) bool {
-	parts := strings.Split(candidate, ":")
+func CompareKey(storedKey, candidate string) bool {
+	parts := strings.Split(storedKey, ":")
 	if len(parts) != 3 {
 		return false
 	}
@@ -65,7 +66,7 @@ func CompareKey(key, candidate string) bool {
 		return false
 	}
 
-	actual := argon2.IDKey([]byte(key), salt, argonTime, argonMemory, argonThreads, argonKeyLen)
+	actual := argon2.IDKey([]byte(candidate), salt, argonTime, argonMemory, argonThreads, argonKeyLen)
 
 	return subtle.ConstantTimeCompare(actual, expected) == 1
 }