Changeset 52018 in vbox for trunk/src/VBox/Runtime/common/math

Timestamp:

Jul 14, 2014 7:44:01 PM (11 years ago)

Author:

vboxsync

svn:sync-xref-src-repo-rev:

94990

Message:

IPRT: Make RTMemSafer use the SUPR3 page allocation if available to allocate locked down memory. Change API to make allocation strategy tweakable to allow for pageable allocations where the support library is not available (build tools like bldRTSignTool) while still making sure the memory is non-pageable for sensitive data

File:

• trunk/src/VBox/Runtime/common/math/bignum.cpp (modified) (3 diffs)

trunk/src/VBox/Runtime/common/math/bignum.cpp

@@ -118 +118 @@
     Assert(cbNew > cbOld);
 
-    void *pvNew;
+    void *pvNew = NULL;
     if (pBigNum->fSensitive)
-        pvNew = RTMemSaferReallocZ(cbOld, pBigNum->pauElements, cbNew);
+    {
+        int rc = RTMemSaferReallocZEx(cbOld, pBigNum->pauElements, cbNew, &pvNew, RTMEMSAFER_ALLOC_EX_ALLOW_PAGEABLE_BACKING);
+        Assert(VALID_PTR(pvNew) || RT_FAILURE(rc));
+    }
     else
         pvNew = RTMemRealloc(pBigNum->pauElements, cbNew);
@@ -323 +326 @@
         pBigNum->cAllocated = RT_ALIGN_32(pBigNum->cUsed, 4);
         if (pBigNum->fSensitive)
-            pBigNum->pauElements = (RTBIGNUMELEMENT *)RTMemSaferAllocZ(pBigNum->cAllocated * RTBIGNUM_ELEMENT_SIZE);
+        {
+            int rc = RTMemSaferAllocZEx((void **)&pBigNum->pauElements, pBigNum->cAllocated * RTBIGNUM_ELEMENT_SIZE,
+                                        RTMEMSAFER_ALLOC_EX_ALLOW_PAGEABLE_BACKING);
+            Assert(VALID_PTR(pBigNum->pauElements) || RT_FAILURE(rc));
+        }
         else
             pBigNum->pauElements = (RTBIGNUMELEMENT *)RTMemAlloc(pBigNum->cAllocated * RTBIGNUM_ELEMENT_SIZE);
@@ -457 +464 @@
         pBigNum->cAllocated = RT_ALIGN_32(pBigNum->cUsed, 4);
         if (pBigNum->fSensitive)
-            pBigNum->pauElements = (RTBIGNUMELEMENT *)RTMemSaferAllocZ(pBigNum->cAllocated * RTBIGNUM_ELEMENT_SIZE);
+        {
+            rc = RTMemSaferAllocZEx((void **)&pBigNum->pauElements, pBigNum->cAllocated * RTBIGNUM_ELEMENT_SIZE,
+                                    RTMEMSAFER_ALLOC_EX_ALLOW_PAGEABLE_BACKING);
+            Assert(VALID_PTR(pBigNum->pauElements) || RT_FAILURE(rc));
+        }
         else
             pBigNum->pauElements = (RTBIGNUMELEMENT *)RTMemAlloc(pBigNum->cAllocated * RTBIGNUM_ELEMENT_SIZE);