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Make EVORE a bit safer

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This commit is contained in:
Matt Nadareski
2021-04-01 10:36:03 -07:00
parent f9e7fd5725
commit 18a78f44c0
1 changed files with 34 additions and 27 deletions
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61
BurnOutSharp/EVORE.cs
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@@ -181,43 +181,50 @@ namespace BurnOutSharp
private static IMAGE_SECTION_HEADER ReadSection(byte[] fileContent, int ptr)
{
// Get the size of a section header for later
int sectionSize = Marshal.SizeOf<IMAGE_SECTION_HEADER>();
// If the contents are null or the wrong size, we can't read a section
if (fileContent == null || fileContent.Length < sectionSize)
return null;
// Create a new section and try our best to read one
IMAGE_SECTION_HEADER section = null;
IntPtr tempPtr = IntPtr.Zero;
try
{
// Get the pointer to where the section will go
tempPtr = Marshal.AllocHGlobal(sectionSize);
// If we couldn't get the space, just return null
if (tempPtr == IntPtr.Zero)
// Get the size of a section header for later
int sectionSize = Marshal.SizeOf<IMAGE_SECTION_HEADER>();
// If the contents are null or the wrong size, we can't read a section
if (fileContent == null || fileContent.Length < sectionSize)
return null;
// Copy from the array to the new space
Marshal.Copy(fileContent, ptr, tempPtr, sectionSize);
// Create a new section and try our best to read one
IMAGE_SECTION_HEADER section = null;
IntPtr tempPtr = IntPtr.Zero;
try
{
// Get the pointer to where the section will go
tempPtr = Marshal.AllocHGlobal(sectionSize);
// If we couldn't get the space, just return null
if (tempPtr == IntPtr.Zero)
return null;
// Get the new section and return
section = Marshal.PtrToStructure<IMAGE_SECTION_HEADER>(tempPtr);
// Copy from the array to the new space
Marshal.Copy(fileContent, ptr, tempPtr, sectionSize);
// Get the new section and return
section = Marshal.PtrToStructure<IMAGE_SECTION_HEADER>(tempPtr);
}
catch
{
// We don't care what the error was
return null;
}
finally
{
if (tempPtr != IntPtr.Zero)
Marshal.FreeHGlobal(tempPtr);
}
return section;
}
catch
{
// We don't care what the error was
return null;
}
finally
{
if (tempPtr != IntPtr.Zero)
Marshal.FreeHGlobal(tempPtr);
}
return section;
}
private static uint RVA2Offset(uint RVA, IMAGE_SECTION_HEADER[] sections)