api key auth added

utils/security/api_key.go

@@ -0,0 +1,23 @@
+package security
+
+import (
+	"crypto/rand"
+	"crypto/sha256"
+	"encoding/hex"
+)
+
+// GenerateRawKey returns a 32‑byte cryptographically‑random string
+func GenerateRawKey() (string, error) {
+	b := make([]byte, 32)
+	_, err := rand.Read(b)
+	if err != nil {
+		return "", err
+	}
+	return hex.EncodeToString(b), nil
+}
+
+// HashKey returns the SHA‑256 hash suitable for storage.
+func HashKey(raw string) []byte {
+	h := sha256.Sum256([]byte(raw))
+	return h[:]
+}