diff options
Diffstat (limited to 'SecurityPkg/Library/DxeDeferImageLoadLib/DxeDeferImageLoadLib.c')
| -rw-r--r-- | SecurityPkg/Library/DxeDeferImageLoadLib/DxeDeferImageLoadLib.c | 218 |
1 files changed, 143 insertions, 75 deletions
diff --git a/SecurityPkg/Library/DxeDeferImageLoadLib/DxeDeferImageLoadLib.c b/SecurityPkg/Library/DxeDeferImageLoadLib/DxeDeferImageLoadLib.c index fd18d2f7e..3cbd09836 100644 --- a/SecurityPkg/Library/DxeDeferImageLoadLib/DxeDeferImageLoadLib.c +++ b/SecurityPkg/Library/DxeDeferImageLoadLib/DxeDeferImageLoadLib.c @@ -1,7 +1,7 @@ /** @file
Implement defer image load services for user identification in UEFI2.2.
-Copyright (c) 2009 - 2012, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2009 - 2013, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
@@ -263,57 +263,107 @@ GetAccessControl ( return EFI_NOT_FOUND;
}
-
/**
- Convert the '/' to '\' in the specified string.
+ Get file name from device path.
- @param[in, out] Str Points to the string to convert.
+ The file name may contain one or more device path node. Save the file name in a
+ buffer if file name is found. The caller is responsible to free the buffer.
+
+ @param[in] DevicePath A pointer to a device path.
+ @param[out] FileName The callee allocated buffer to save the file name if file name is found.
+ @param[out] FileNameOffset The offset of file name in device path if file name is found.
+
+ @retval UINTN The file name length. 0 means file name is not found.
**/
-VOID
-ConvertDPStr (
- IN OUT EFI_STRING Str
+UINTN
+GetFileName (
+ IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath,
+ OUT UINT8 **FileName,
+ OUT UINTN *FileNameOffset
)
{
- INTN Count;
- INTN Index;
-
- Count = StrSize(Str) / 2 - 1;
+ UINTN Length;
+ EFI_DEVICE_PATH_PROTOCOL *TmpDevicePath;
+ EFI_DEVICE_PATH_PROTOCOL *RootDevicePath;
+ CHAR8 *NodeStr;
+ UINTN NodeStrLength;
+ CHAR16 LastNodeChar;
+ CHAR16 FirstNodeChar;
- if (Count < 4) {
- return;
+ //
+ // Get the length of DevicePath before file name.
+ //
+ Length = 0;
+ RootDevicePath = (EFI_DEVICE_PATH_PROTOCOL *)DevicePath;
+ while (!IsDevicePathEnd (RootDevicePath)) {
+ if ((DevicePathType(RootDevicePath) == MEDIA_DEVICE_PATH) && (DevicePathSubType(RootDevicePath) == MEDIA_FILEPATH_DP)) {
+ break;
+ }
+ Length += DevicePathNodeLength (RootDevicePath);
+ RootDevicePath = NextDevicePathNode (RootDevicePath);
}
-
+
+ *FileNameOffset = Length;
+ if (Length == 0) {
+ return 0;
+ }
+
//
- // Convert device path string.
+ // Get the file name length.
//
- Index = Count - 1;
- while (Index > 0) {
- //
- // Find the last '/'.
- //
- for (Index = Count - 1; Index > 0; Index--) {
- if (Str[Index] == L'/')
- break;
+ Length = 0;
+ TmpDevicePath = RootDevicePath;
+ while (!IsDevicePathEnd (TmpDevicePath)) {
+ if ((DevicePathType(TmpDevicePath) != MEDIA_DEVICE_PATH) || (DevicePathSubType(TmpDevicePath) != MEDIA_FILEPATH_DP)) {
+ break;
}
+ Length += DevicePathNodeLength (TmpDevicePath) - sizeof (EFI_DEVICE_PATH_PROTOCOL);
+ TmpDevicePath = NextDevicePathNode (TmpDevicePath);
+ }
+ if (Length == 0) {
+ return 0;
+ }
- //
- // Check next char.
- //
- if (Str[Index + 1] == L'\\')
- return;
+ *FileName = AllocateZeroPool (Length);
+ ASSERT (*FileName != NULL);
+
+ //
+ // Copy the file name to the buffer.
+ //
+ Length = 0;
+ LastNodeChar = '\\';
+ TmpDevicePath = RootDevicePath;
+ while (!IsDevicePathEnd (TmpDevicePath)) {
+ if ((DevicePathType(TmpDevicePath) != MEDIA_DEVICE_PATH) || (DevicePathSubType(TmpDevicePath) != MEDIA_FILEPATH_DP)) {
+ break;
+ }
+
+ FirstNodeChar = (CHAR16) ReadUnaligned16 ((UINT16 *)((UINT8 *)TmpDevicePath + sizeof (EFI_DEVICE_PATH_PROTOCOL)));
+ NodeStr = (CHAR8 *)TmpDevicePath + sizeof (EFI_DEVICE_PATH_PROTOCOL);
+ NodeStrLength = DevicePathNodeLength (TmpDevicePath) - sizeof (EFI_DEVICE_PATH_PROTOCOL) - sizeof(CHAR16);
- Str[Index] = L'\\';
+ if ((FirstNodeChar == '\\') && (LastNodeChar == '\\')) {
+ //
+ // Skip separator "\" when there are two separators.
+ //
+ NodeStr += sizeof (CHAR16);
+ NodeStrLength -= sizeof (CHAR16);
+ } else if ((FirstNodeChar != '\\') && (LastNodeChar != '\\')) {
+ //
+ // Add separator "\" when there is no separator.
+ //
+ WriteUnaligned16 ((UINT16 *)(*FileName + Length), '\\');
+ Length += sizeof (CHAR16);
+ }
+ CopyMem (*FileName + Length, NodeStr, NodeStrLength);
+ Length += NodeStrLength;
- //
- // Check previous char.
- //
- if ((Index > 0) && (Str[Index - 1] == L'\\')) {
- CopyMem (&Str[Index - 1], &Str[Index], (UINTN) ((Count - Index + 1) * sizeof (CHAR16)));
- return;
- }
- Index--;
- }
+ LastNodeChar = (CHAR16) ReadUnaligned16 ((UINT16 *) (NodeStr + NodeStrLength - sizeof(CHAR16)));
+ TmpDevicePath = NextDevicePathNode (TmpDevicePath);
+ }
+
+ return Length;
}
@@ -342,54 +392,72 @@ CheckDevicePath ( IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath2
)
{
- EFI_STATUS Status;
- EFI_STRING DevicePathStr1;
- EFI_STRING DevicePathStr2;
- UINTN StrLen1;
- UINTN StrLen2;
- EFI_DEVICE_PATH_TO_TEXT_PROTOCOL *DevicePathText;
- BOOLEAN DevicePathEqual;
+ UINTN DevicePathSize;
+ UINTN FileNameSize1;
+ UINTN FileNameSize2;
+ UINT8 *FileName1;
+ UINT8 *FileName2;
+ UINTN FileNameOffset1;
+ UINTN FileNameOffset2;
+ BOOLEAN DevicePathEqual;
+
+ FileName1 = NULL;
+ FileName2 = NULL;
+ DevicePathEqual = TRUE;
ASSERT (DevicePath1 != NULL);
ASSERT (DevicePath2 != NULL);
+ if (IsDevicePathEnd (DevicePath1)) {
+ return FALSE;
+ }
- DevicePathEqual = FALSE;
- DevicePathText = NULL;
- Status = gBS->LocateProtocol (
- &gEfiDevicePathToTextProtocolGuid,
- NULL,
- (VOID **) &DevicePathText
- );
- ASSERT (Status == EFI_SUCCESS);
-
- //
- // Get first device path string.
//
- DevicePathStr1 = DevicePathText->ConvertDevicePathToText (DevicePath1, TRUE, TRUE);
- ConvertDPStr (DevicePathStr1);
+ // The file name may contain one or more device path node.
+ // To compare the file name, copy file name to a buffer and compare the buffer.
//
- // Get second device path string.
- //
- DevicePathStr2 = DevicePathText->ConvertDevicePathToText (DevicePath2, TRUE, TRUE);
- ConvertDPStr (DevicePathStr2);
-
+ FileNameSize1 = GetFileName (DevicePath1, &FileName1, &FileNameOffset1);
+ if (FileNameSize1 != 0) {
+ FileNameSize2 = GetFileName (DevicePath2, &FileName2, &FileNameOffset2);
+ if (FileNameOffset1 != FileNameOffset2) {
+ DevicePathEqual = FALSE;
+ goto Done;
+ }
+ if (CompareMem (DevicePath1, DevicePath2, FileNameOffset1) != 0) {
+ DevicePathEqual = FALSE;
+ goto Done;
+ }
+ if (FileNameSize1 > FileNameSize2) {
+ DevicePathEqual = FALSE;
+ goto Done;
+ }
+ if (CompareMem (FileName1, FileName2, FileNameSize1) != 0) {
+ DevicePathEqual = FALSE;
+ goto Done;
+ }
+ DevicePathEqual = TRUE;
+ goto Done;
+ }
+
+ DevicePathSize = GetDevicePathSize (DevicePath1);
+ if (DevicePathSize > GetDevicePathSize (DevicePath2)) {
+ return FALSE;
+ }
+
//
- // Compare device path string.
+ // Exclude the end of device path node.
//
- StrLen1 = StrSize (DevicePathStr1);
- StrLen2 = StrSize (DevicePathStr2);
- if (StrLen1 > StrLen2) {
+ DevicePathSize -= sizeof (EFI_DEVICE_PATH_PROTOCOL);
+ if (CompareMem (DevicePath1, DevicePath2, DevicePathSize) != 0) {
DevicePathEqual = FALSE;
- goto Done;
- }
+ }
- if (CompareMem (DevicePathStr1, DevicePathStr2, StrLen1) == 0) {
- DevicePathEqual = TRUE;
+Done:
+ if (FileName1 != NULL) {
+ FreePool (FileName1);
+ }
+ if (FileName2 != NULL) {
+ FreePool (FileName2);
}
-
-Done:
- FreePool (DevicePathStr1);
- FreePool (DevicePathStr2);
return DevicePathEqual;
}
|