| 30 | #include <Library/OcGuardLib.h> |
| 31 | |
| 32 | VOID * |
| 33 | ReadFile ( |
| 34 | IN EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *FileSystem, |
| 35 | IN CONST CHAR16 *FilePath, |
| 36 | OUT UINT32 *FileSize OPTIONAL, |
| 37 | IN UINT32 MaxFileSize OPTIONAL |
| 38 | ) |
| 39 | { |
| 40 | EFI_STATUS Status; |
| 41 | EFI_FILE_HANDLE Volume; |
| 42 | EFI_FILE_HANDLE FileHandle; |
| 43 | UINT8 *FileBuffer; |
| 44 | UINT32 FileBufferSize; |
| 45 | UINT32 FileReadSize; |
| 46 | |
| 47 | ASSERT (FileSystem != NULL); |
| 48 | ASSERT (FilePath != NULL); |
| 49 | |
| 50 | Status = FileSystem->OpenVolume ( |
| 51 | FileSystem, |
| 52 | &Volume |
| 53 | ); |
| 54 | if (EFI_ERROR(Status)) { |
| 55 | return NULL; |
| 56 | } |
| 57 | |
| 58 | Status = SafeFileOpen ( |
| 59 | Volume, |
| 60 | &FileHandle, |
| 61 | (CHAR16 *) FilePath, |
| 62 | EFI_FILE_MODE_READ, |
| 63 | 0 |
| 64 | ); |
| 65 | |
| 66 | Volume->Close (Volume); |
| 67 | |
| 68 | if (EFI_ERROR(Status)) { |
| 69 | return NULL; |
| 70 | } |
| 71 | |
| 72 | Status = GetFileSize ( |
| 73 | FileHandle, |
| 74 | &FileReadSize |
| 75 | ); |
| 76 | if (EFI_ERROR(Status) |
| 77 | || OcOverflowAddU32 (FileReadSize, sizeof (CHAR16), &FileBufferSize) |
| 78 | || (MaxFileSize > 0 && FileReadSize > MaxFileSize)) { |
| 79 | FileHandle->Close (FileHandle); |
| 80 | return NULL; |
| 81 | } |
| 82 | |
| 83 | FileBuffer = AllocatePool (FileBufferSize); |
| 84 | if (FileBuffer != NULL) { |
| 85 | Status = GetFileData ( |
| 86 | FileHandle, |
| 87 | 0, |
| 88 | FileReadSize, |
| 89 | FileBuffer |
no test coverage detected