crypt32: Avoid NULL ptr dereferences before checks (Coverity).

dlls/crypt32/ctl.c

@@ -341,7 +341,7 @@ PCCTL_CONTEXT WINAPI CertFindCTLInStore(HCERTSTORE hCertStore,
 
 BOOL WINAPI CertDeleteCTLFromStore(PCCTL_CONTEXT pCtlContext)
 {
-    WINECRYPT_CERTSTORE *hcs = pCtlContext->hCertStore;
+    WINECRYPT_CERTSTORE *hcs;
     ctl_t *ctl = ctl_from_ptr(pCtlContext);
     BOOL ret;
 
@@ -350,6 +350,8 @@ BOOL WINAPI CertDeleteCTLFromStore(PCCTL_CONTEXT pCtlContext)
     if (!pCtlContext)
         return TRUE;
 
+    hcs = pCtlContext->hCertStore;
+
     if (hcs->dwMagic != WINE_CRYPTCERTSTORE_MAGIC)
             return FALSE;
 

dlls/crypt32/store.c

@@ -949,13 +949,15 @@ PCCERT_CONTEXT WINAPI CertEnumCertificatesInStore(HCERTSTORE hCertStore, PCCERT_
 
 BOOL WINAPI CertDeleteCertificateFromStore(PCCERT_CONTEXT pCertContext)
 {
-    WINECRYPT_CERTSTORE *hcs = pCertContext->hCertStore;
+    WINECRYPT_CERTSTORE *hcs;
 
     TRACE("(%p)\n", pCertContext);
 
     if (!pCertContext)
         return TRUE;
 
+    hcs = pCertContext->hCertStore;
+
     if (hcs->dwMagic != WINE_CRYPTCERTSTORE_MAGIC)
         return FALSE;
 
@@ -1084,7 +1086,7 @@ BOOL WINAPI CertAddCRLContextToStore(HCERTSTORE hCertStore,
 
 BOOL WINAPI CertDeleteCRLFromStore(PCCRL_CONTEXT pCrlContext)
 {
-    WINECRYPT_CERTSTORE *hcs = pCrlContext->hCertStore;
+    WINECRYPT_CERTSTORE *hcs;
     BOOL ret;
 
     TRACE("(%p)\n", pCrlContext);
@@ -1092,6 +1094,8 @@ BOOL WINAPI CertDeleteCRLFromStore(PCCRL_CONTEXT pCrlContext)
     if (!pCrlContext)
         return TRUE;
 
+    hcs = pCrlContext->hCertStore;
+
     if (hcs->dwMagic != WINE_CRYPTCERTSTORE_MAGIC)
         return FALSE;