Index: /trunk/src/VBox/Main/src-server/MediumImpl.cpp
===================================================================
--- /trunk/src/VBox/Main/src-server/MediumImpl.cpp	(revision 54949)
+++ /trunk/src/VBox/Main/src-server/MediumImpl.cpp	(revision 54950)
@@ -7124,4 +7124,6 @@
 {
     /* Just return always true here. */
+    NOREF(pvUser);
+    NOREF(pszzValid);
     return true;
 }
@@ -7190,4 +7192,7 @@
 {
     Medium::CryptoFilterSettings *pSettings = (Medium::CryptoFilterSettings *)pvUser;
+    NOREF(pszId);
+    NOREF(ppbKey);
+    NOREF(pcbKey);
     AssertPtrReturn(pSettings, VERR_GENERAL_FAILURE);
     AssertMsgFailedReturn(("This method should not be called here!\n"), VERR_INVALID_STATE);
@@ -7197,4 +7202,5 @@
 {
     Medium::CryptoFilterSettings *pSettings = (Medium::CryptoFilterSettings *)pvUser;
+    NOREF(pszId);
     AssertPtrReturn(pSettings, VERR_GENERAL_FAILURE);
     AssertMsgFailedReturn(("This method should not be called here!\n"), VERR_INVALID_STATE);
@@ -7206,4 +7212,5 @@
     AssertPtrReturn(pSettings, VERR_GENERAL_FAILURE);
 
+    NOREF(pszId);
     *ppszPassword = pSettings->pszPassword;
     return VINF_SUCCESS;
@@ -7214,4 +7221,5 @@
     Medium::CryptoFilterSettings *pSettings = (Medium::CryptoFilterSettings *)pvUser;
     AssertPtrReturn(pSettings, VERR_GENERAL_FAILURE);
+    NOREF(pszId);
     return VINF_SUCCESS;
 }
@@ -9171,8 +9179,4 @@
         Medium::CryptoFilterSettings CryptoSettingsWrite;
 
-        uint8_t *pbDek = NULL;
-        size_t cbDek = 0;
-        char *pszCipherOld = NULL;
-        char *pszKeyStoreEncNew = NULL;
         void *pvBuf = NULL;
         const char *pszPasswordNew = NULL;