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CloverBootloader/FSInject/FSInject.c
SergeySlice 6b33696c93 kext and kernel patches will be part of LOADER_ENTRY class 
Signed-off-by: SergeySlice <sergey.slice@gmail.com>
2020-05-01 19:26:28 +03:00

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/** @file
Module Name:
FSInject.c
FSInject driver - Replaces EFI_SIMPLE_FILE_SYSTEM_PROTOCOL on target volume
and injects content of specified source folder on source (injection) volume
into target folder in target volume.
initial version - dmazar
**/
#include <Library/BaseLib.h>
#include <Library/UefiLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/UefiRuntimeServicesTableLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/DebugLib.h>
#include <Library/PrintLib.h>
#include <Library/MemLogLib.h>
#include <Protocol/SimpleFileSystem.h>
#include <Guid/GlobalVariable.h>
#include <Guid/FileInfo.h>
#include <Guid/FileSystemInfo.h>
#include <Guid/FileSystemVolumeLabelInfo.h>
#include <Protocol/FSInjectProtocol.h>
#include "FSInject.h"
//#include "../Version.h"
//CONST CHAR8* CloverRevision = REVISION_STR;
// DBG_TO: 0=no debug, 1=serial, 2=console
// serial requires
// [PcdsFixedAtBuild]
// gEfiMdePkgTokenSpaceGuid.PcdDebugPropertyMask|0x07
// gEfiMdePkgTokenSpaceGuid.PcdDebugPrintErrorLevel|0xFFFFFFFF
// in package DSC file
#define DBG_TO 3
#if DBG_TO == 3
#define DBG(...) MemLog(FALSE, 0, __VA_ARGS__)
#elif DBG_TO == 2
#define DBG(...) AsciiPrint(__VA_ARGS__)
#elif DBG_TO == 1
#define DBG(...) DebugPrint(1, __VA_ARGS__)
#else
#define DBG(...)
#endif
#define TEST 0
#if TEST
#include "Test.h"
#endif
#define EfiGuidStrMapLen 4
/** Map of known guids and friendly names. Searchable with GuidStr() */
struct {
EFI_GUID *Guid;
CHAR16 *Str;
} EfiGuidStrMap[EfiGuidStrMapLen] = {
{NULL, L"Tmp buffer AE074D26-6E9E-11E1-A5B8-9BFC4824019B"},
{&gEfiFileInfoGuid, L"gEfiFileInfoGuid"},
{&gEfiFileSystemInfoGuid, L"gEfiFileSystemInfoGuid"},
{&gEfiFileSystemVolumeLabelInfoIdGuid, L"gEfiFileSystemVolumeLabelInfoIdGuid"}
};
/** Returns GUID as string, with friendly name for known guids. */
CHAR16*
EFIAPI
GuidStr(IN EFI_GUID *Guid)
{
UINTN i;
CHAR16 *Str = NULL;
for(i = 1; i < EfiGuidStrMapLen; i++) {
if (CompareGuid(EfiGuidStrMap[i].Guid, Guid)) {
Str = EfiGuidStrMap[i].Str;
break;
}
}
if (Str == NULL) {
UnicodeSPrint(EfiGuidStrMap[0].Str, 47 * 2, L"%g", Guid);
Str = EfiGuidStrMap[0].Str;
}
return Str;
}
/** Returns pointer to last Char in String or NULL. */
CHAR16*
EFIAPI
GetStrLastChar(IN CHAR16 *String)
{
CHAR16 *Pos;
if (String == NULL || *String == L'\0') {
return NULL;
}
// go to end
Pos = String;
while (*Pos != L'\0') {
Pos++;
}
Pos--;
return Pos;
}
/** Returns pointer to last occurence of Char in String or NULL. */
CHAR16*
EFIAPI
GetStrLastCharOccurence(IN CHAR16 *String, IN CHAR16 Char)
{
CHAR16 *Pos;
if (String == NULL || *String == L'\0') {
return NULL;
}
// go to end
Pos = String;
while (*Pos != L'\0') {
Pos++;
}
// search for Char
while (*Pos != Char && Pos != String) {
Pos--;
}
return (*Pos == Char) ? Pos : NULL;
}
/** Returns upper case version of char - valid only for ASCII chars in unicode. */
CHAR16
EFIAPI
ToUpperChar(IN CHAR16 Chr)
{
CHAR8 C;
if (Chr > 0x100) return Chr;
C = (CHAR8)Chr;
return ((C >= 'a' && C <= 'z') ? C - ('a' - 'A') : C);
}
/** Returns 0 if two strings are equal, !=0 otherwise. Compares just first 8 bits of chars (valid for ASCII), case insensitive.. */
UINTN
EFIAPI
StrCmpiBasic(IN CHAR16 *String1, IN CHAR16 *String2)
{
CHAR16 Chr1;
CHAR16 Chr2;
DBG("Cmpi('%s', '%s') ", String1, String2);
if (String1 == NULL || String2 == NULL) {
return 1;
}
if (*String1 == L'\0' && *String2 == L'\0') {
return 0;
}
if (*String1 == L'\0' || *String2 == L'\0') {
return 1;
}
Chr1 = ToUpperChar(*String1);
Chr2 = ToUpperChar(*String2);
while ((*String1 != L'\0') && (Chr1 == Chr2)) {
String1++;
String2++;
Chr1 = ToUpperChar(*String1);
Chr2 = ToUpperChar(*String2);
}
DBG("=%s ", (Chr1 - Chr2) ? L"NEQ" : L"EQ");
return Chr1 - Chr2;
}
/** Returns TRUE if String1 starts with String2, FALSE otherwise. Compares just first 8 bits of chars (valid for ASCII), case insensitive.. */
BOOLEAN
EFIAPI
StriStartsWithBasic(IN CHAR16 *String1, IN CHAR16 *String2)
{
CHAR16 Chr1;
CHAR16 Chr2;
BOOLEAN Result;
DBG("StriStarts('%s', '%s') ", String1, String2);
if (String1 == NULL || String2 == NULL) {
return FALSE;
}
if (*String1 == L'\0' && *String2 == L'\0') {
return TRUE;
}
if (*String1 == L'\0' || *String2 == L'\0') {
return FALSE;
}
Chr1 = ToUpperChar(*String1);
Chr2 = ToUpperChar(*String2);
while ((Chr1 != L'\0') && (Chr2 != L'\0') && (Chr1 == Chr2)) {
String1++;
String2++;
Chr1 = ToUpperChar(*String1);
Chr2 = ToUpperChar(*String2);
}
Result = ((Chr1 == L'\0') && (Chr2 == L'\0'))
|| ((Chr1 != L'\0') && (Chr2 == L'\0'));
DBG("=%s \n", Result ? L"TRUE" : L"FALSE");
return Result;
}
/** Composes file name from Parent and FName. Allocates memory for result which should be released by caller. */
CHAR16*
EFIAPI
GetNormalizedFName(IN CHAR16 *Parent, IN CHAR16 *FName)
{
CHAR16 *TmpStr;
CHAR16 *TmpStr2;
UINTN Len;
DBG("NormFName('%s' + '%s')", Parent, FName);
// case: FName starts with \ "\System\Xx"
// we'll just use it as is, but we are wrong if "\System\Xx\..\Yy\.\Zz" or similar
if (FName[0] == L'\\') {
FName = AllocateCopyPool(StrSize(FName), FName); // reusing FName
}
// case: FName is "."
// we'll just copy Parent assuming Parent is normalized, which will be the case if this func will be correct once
else if (FName[0] == L'.' && FName[1] == L'\0') {
FName = AllocateCopyPool(StrSize(Parent), Parent);
}
// case: FName is ".."
// we'll extract Parent's parent - also assuming Parent is normalized
else if (FName[0] == L'.' && FName[1] == L'.' && FName[2] == L'\0') {
TmpStr = GetStrLastCharOccurence(Parent, L'\\');
// if there is L'\\' and not at the beginning ...
if (TmpStr != NULL && TmpStr != Parent) {
*TmpStr = L'\0'; // terminating Parent; will return L'\\' back
FName = AllocateCopyPool(StrSize(Parent), Parent);
*TmpStr = L'\\'; // return L'\\' back to Parent
} else {
// caller is doing something wrong - we'll default to L"\\"
FName = AllocateCopyPool(StrSize(L"\\"), L"\\");
}
}
// other cases: for now just do Parent + \ + FName
// but check if Parent already ends with backslash
else {
Len = StrSize(Parent) + StrSize(FName); // has place for extra char (\\) if needed
TmpStr = AllocateZeroPool(Len);
StrCpyS(TmpStr, Len/sizeof(CHAR16), Parent);
TmpStr2 = GetStrLastChar(Parent);
if (TmpStr2 == NULL || *TmpStr2 != L'\\') {
StrCatS(TmpStr, Len/sizeof(CHAR16), L"\\");
}
StrCatS(TmpStr, Len/sizeof(CHAR16), FName);
DBG("='%s' ", TmpStr);
return TmpStr;
}
DBG("='%s' ", FName);
return FName;
}
/** If FName starts with TgtDir, then extracts the rest from FName and copies it to SrcDir and returns it. Or NULL.
* Caller is responsible for releasing memory for returned string.
* Example: TgtDir="\S\L\E", SrcDir="\efi\10.7", FName="\S\L\E\Xx.kext\Contents\Info.plist"
* This should return "\efi\10.7\Xx.kext\Contents\Info.plist"
*/
CHAR16*
EFIAPI
GetInjectionFName(IN CHAR16 *TgtDir, IN CHAR16 *SrcDir, IN CHAR16 *FName)
{
CHAR16 Chr1;
CHAR16 Chr2;
CHAR16 *Str1;
CHAR16 *Str2;
UINTN Size;
DBG("InjFName('%s', '%s', '%s')", TgtDir, SrcDir, FName);
if (TgtDir == NULL || SrcDir == NULL || FName == NULL) {
DBG("=NULL0 ");
return NULL;
}
// check if FName starts with TgtDir, kind of case insensitive (only ASCII chars)
Str1 = TgtDir;
Str2 = FName;
Chr1 = ToUpperChar(*Str1);
Chr2 = ToUpperChar(*Str2);
while ((*Str1 != L'\0') && (Chr1 == Chr2)) {
Str1++;
Str2++;
Chr1 = ToUpperChar(*Str1);
Chr2 = ToUpperChar(*Str2);
}
// if FName starts with TgtDir, then *Str1 should be '\0'
if (*Str1 != L'\0') {
DBG("=NULL1 ");
return NULL;
}
// if FName is a file inside TgtDir, then *Str2 should be == '\\'
if (*Str2 != L'\\') {
DBG("=NULL2 ");
return NULL;
}
// we are at '\\' with Str2 - copy from here to the end to SrcDir
// determine the buffer size for new string
Size = StrSize(SrcDir) + StrSize(Str2) - 2;
Str1 = AllocateZeroPool(Size);
if (Str1 != NULL) {
StrCpyS(Str1, Size/sizeof(CHAR16), SrcDir);
StrCatS(Str1, Size/sizeof(CHAR16), Str2);
}
DBG("='%s' ", Str1);
return Str1;
}
/** Openes EFI_FILE_PROTOCOL on given VolumeFS for given FName. */
EFI_FILE_PROTOCOL*
EFIAPI
OpenFileProtocol(
IN EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *VolumeFS,
IN CHAR16 *FName,
IN UINT64 OpenMode,
IN UINT64 Attributes
)
{
EFI_STATUS Status;
EFI_FILE_PROTOCOL *RootFP;
EFI_FILE_PROTOCOL *FP;
// open volume
Status = VolumeFS->OpenVolume(VolumeFS, &RootFP);
if (EFI_ERROR(Status)) {
DBG("Can not OpenVolume: %r ", Status);
return NULL;
}
// open file/dir
Status = RootFP->Open(RootFP, &FP, FName, OpenMode, Attributes);
if (EFI_ERROR(Status)) {
DBG("Can not Open '%s': %r ", FName, Status);
FP = NULL;
}
RootFP->Close(RootFP);
return FP;
}
/**************************************************************************************
* FSI_FILE_PROTOCOL - our implementation of EFI_FILE_PROTOCOL
**************************************************************************************/
FSI_FILE_PROTOCOL* EFIAPI CreateFSInjectFP(VOID);
/** EFI_FILE_PROTOCOL.Open - Opens a new file relative to the source file's location. */
EFI_STATUS
EFIAPI
FSI_FP_Open(
IN EFI_FILE_PROTOCOL *This,
OUT EFI_FILE_PROTOCOL **NewHandle,
IN CHAR16 *FileName,
IN UINT64 OpenMode,
IN UINT64 Attributes
)
{
EFI_STATUS Status = EFI_DEVICE_ERROR;
CHAR16 *NewFName;
CHAR16 *InjFName = NULL;
FSI_FILE_PROTOCOL *FSIThis;
FSI_FILE_PROTOCOL *FSINew;
FSI_STRING_LIST *StringList;
FSI_STRING_LIST_ENTRY *StringEntry;
DBG("FSI_FP %p.Open('%s', %x, %x) ", This, FileName, OpenMode, Attributes);
FSIThis = FSI_FROM_FILE_PROTOCOL(This);
NewFName = GetNormalizedFName(FSIThis->FName, FileName);
StringList = FSIThis->FSI_FS->Blacklist;
if (StringList != NULL && !IsListEmpty(&StringList->List)) {
// blocking files in Blacklist
for (StringEntry = (FSI_STRING_LIST_ENTRY *)GetFirstNode(&StringList->List);
!IsNull (&StringList->List, &StringEntry->List);
StringEntry = (FSI_STRING_LIST_ENTRY *)GetNextNode(&StringList->List, &StringEntry->List)
)
{
if (StriStartsWithBasic(NewFName, StringEntry->String)) {
DBG("Blacklisted\n");
return EFI_NOT_FOUND;
}
}
}
// create our FP implementation
FSINew = CreateFSInjectFP();
if (FSINew == NULL) {
Status = EFI_OUT_OF_RESOURCES;
DBG("CreateFSInjectFP Status=%r\n", Status);
return Status;
}
FSINew->FSI_FS = FSIThis->FSI_FS; // saving reference to parent FS protocol
FSINew->FName =NewFName;
FSINew->TgtFP = NULL;
FSINew->SrcFP = NULL;
// mach_kernel - if exists in SrcDir, then inject this one
if (StrCmpiBasic(NewFName, L"\\mach_kernel") == 0) {
DBG("mach_kernel ");
if (FSIThis->FSI_FS->SrcDir != NULL && FSIThis->FSI_FS->SrcFS != NULL) {
InjFName = GetInjectionFName(L"\0", FSIThis->FSI_FS->SrcDir, NewFName);
if (InjFName != NULL) {
// if this one exists inside injection dir - should be opened with SrcFP
FSINew->SrcFP = OpenFileProtocol(FSIThis->FSI_FS->SrcFS, InjFName, OpenMode, Attributes);
if (FSINew->SrcFP != NULL) {
FSINew->FromTgt = FALSE;
DBG("Opened with SrcFP ");
goto SuccessExit;
} else {
DBG(" no injection, SrcFP->Open=%r ", Status);
}
}
}
}
// S/L/Kernels/kernel - if exists in SrcDir, then inject this one
if (StrCmpiBasic(NewFName, L"\\System\\Library\\Kernels\\kernel") == 0) {
DBG("kernel ");
if (FSIThis->FSI_FS->SrcDir != NULL && FSIThis->FSI_FS->SrcFS != NULL) {
InjFName = GetInjectionFName(L"\0", FSIThis->FSI_FS->SrcDir, L"\\kernel");
if (InjFName != NULL) {
// if this one exists inside injection dir - should be opened with SrcFP
FSINew->SrcFP = OpenFileProtocol(FSIThis->FSI_FS->SrcFS, InjFName, OpenMode, Attributes);
if (FSINew->SrcFP != NULL) {
FSINew->FromTgt = FALSE;
DBG("Opened with SrcFP ");
goto SuccessExit;
} else {
DBG(" no injection, SrcFP->Open=%r ", Status);
}
}
InjFName = GetInjectionFName(L"\0", FSIThis->FSI_FS->SrcDir, L"\\mach_kernel");
if (InjFName != NULL) {
// if this one exists inside injection dir - should be opened with SrcFP
FSINew->SrcFP = OpenFileProtocol(FSIThis->FSI_FS->SrcFS, InjFName, OpenMode, Attributes);
if (FSINew->SrcFP != NULL) {
FSINew->FromTgt = FALSE;
DBG("Opened with SrcFP ");
goto SuccessExit;
} else {
DBG(" no injection, SrcFP->Open=%r ", Status);
}
}
}
}
// try with target
if (FSIThis->TgtFP != NULL) {
// call original target implementation to get NewHandle
Status = FSIThis->TgtFP->Open(FSIThis->TgtFP, NewHandle, NewFName, OpenMode, Attributes);
if (EFI_ERROR(Status)) {
DBG("TgtFP->Open=%r ", Status);
} else {
DBG("Opened with TgtFP ");
FSINew->FromTgt = TRUE;
// save new orig target handle
FSINew->TgtFP = *NewHandle;
}
}
// if write protected - return now
if (Status == EFI_WRITE_PROTECTED) {
goto ErrorExit;
}
// handle injection if needed
if (EFI_ERROR(Status) && FSIThis->FSI_FS->SrcDir != NULL && FSIThis->FSI_FS->SrcFS != NULL) {
// if not found and injection requested: try injection dir
InjFName = GetInjectionFName(FSIThis->FSI_FS->TgtDir, FSIThis->FSI_FS->SrcDir, NewFName);
if (InjFName != NULL) {
// this one exists inside injection dir - should be opened with SrcFP
FSINew->FromTgt = FALSE;
FSINew->SrcFP = OpenFileProtocol(FSIThis->FSI_FS->SrcFS, InjFName, OpenMode, Attributes);
if (FSINew->SrcFP == NULL) {
Status = EFI_DEVICE_ERROR;
DBG("SrcFP->Open=%r ", Status);
} else {
Status = EFI_SUCCESS;
DBG("Opened with SrcFP ");
// ok - we are injecting kexts with FSInject driver because user requested
// it with NoCaches or because boot.efi refused to load kernelcache for some reason.
// let's inform Clover's kext injection that it does not have to do
// in-memory kext injection.
{
STATIC UINT8 KextsInjected = 0;
if (KextsInjected == 0) {
gRT->SetVariable(L"FSInject.KextsInjected",
&gEfiGlobalVariableGuid,
EFI_VARIABLE_BOOTSERVICE_ACCESS,
sizeof(KextsInjected),
&KextsInjected
);
//AsciiPrint("\nFSInject.KextsInjected\n");
//gBS->Stall(3000000);
}
KextsInjected++;
}
}
}
if (EFI_ERROR(Status) && FSIThis->TgtFP == NULL) {
// this happens when we are called on FP that is opened with SrcFP (we do not have TgtFP)
// and then with FName ".." (in shell), and when resulting dir in actually on TgtFP.
// need to open it with TgtFP
FSINew->TgtFP = OpenFileProtocol(FSIThis->FSI_FS->TgtFS, NewFName, OpenMode, Attributes);
if (FSINew->TgtFP != NULL) {
Status = EFI_SUCCESS;
DBG("Opened with TgtFP ");
FSINew->FromTgt = TRUE;
} else {
Status = EFI_DEVICE_ERROR;
DBG("TgtFS->OpenVolume Status=%r\n", Status);
}
}
}
// if still error - quit
if (EFI_ERROR(Status)) {
goto ErrorExit;
}
// we are here with EFI_SUCCESS
// check if this is injection point (target dir where we should inject)
if (FSINew->TgtFP != NULL && FSINew->FSI_FS->SrcFS != NULL && FSINew->FSI_FS->SrcDir != NULL
&& StrCmpiBasic(FSINew->FSI_FS->TgtDir, FSINew->FName) == 0)
{
// it is - open injection dir also
// this FP will have both TgtFP and SrcFP - can be used for test later
// in case of error, it will be NULL - all should run fine then, but without injection
FSINew->SrcFP = OpenFileProtocol(FSINew->FSI_FS->SrcFS, FSINew->FSI_FS->SrcDir, EFI_FILE_MODE_READ, 0);
if (FSINew->SrcFP != NULL) {
DBG("Opened also with SrcFP ");
} else {
DBG("Error opening with SrcFP ");
}
}
SuccessExit:
// set our implementation as a result
*NewHandle = &(FSINew->FP);
DBG("= EFI_SUCCESS, NewHandle=%p, FName='%s'\n", *NewHandle, FSINew->FName);
return EFI_SUCCESS;
ErrorExit:
if (FSINew->FName != NULL) FreePool(FSINew->FName);
if (FSINew != NULL) FreePool(FSINew);
DBG("= %r\n", Status);
return Status;
}
/** EFI_FILE_PROTOCOL.Close - Closes a specified file handle. */
EFI_STATUS
EFIAPI
FSI_FP_Close(IN EFI_FILE_PROTOCOL *This)
{
EFI_STATUS Status = EFI_SUCCESS;
FSI_FILE_PROTOCOL *FSIThis;
DBG("FSI_FP %p.Close() ", This);
FSIThis = FSI_FROM_FILE_PROTOCOL(This);
if (FSIThis->TgtFP != NULL) {
// close target FP
Status = FSIThis->TgtFP->Close(FSIThis->TgtFP);
FSIThis->TgtFP = NULL;
}
if (FSIThis->SrcFP != NULL) {
// close source (injection) FP
FSIThis->SrcFP->Close(FSIThis->SrcFP);
FSIThis->SrcFP = NULL;
}
DBG("FName='%s' ", FSIThis->FName);
if (FSIThis->FName != NULL) {
FreePool(FSIThis->FName);
FSIThis->FName = NULL;
}
FreePool(FSIThis);
DBG("= %r\n", Status);
return Status;
}
/** EFI_FILE_PROTOCOL.Delete - Close and delete the file handle. */
EFI_STATUS
EFIAPI
FSI_FP_Delete(IN EFI_FILE_PROTOCOL *This)
{
EFI_STATUS Status = EFI_WARN_DELETE_FAILURE;
FSI_FILE_PROTOCOL *FSIThis;
DBG("FSI_FP %p.Delete()\n", This);
FSIThis = FSI_FROM_FILE_PROTOCOL(This);
if (FSIThis->TgtFP != NULL) {
// do it with target FP
Status = FSIThis->TgtFP->Delete(FSIThis->TgtFP);
FSIThis->TgtFP = NULL;
}
if (FSIThis->SrcFP != NULL) {
// close source FP
FSIThis->SrcFP->Close(FSIThis->SrcFP);
FSIThis->SrcFP = NULL;
}
if (FSIThis->FName != NULL) {
FreePool(FSIThis->FName);
FSIThis->FName = NULL;
}
FreePool(FSIThis);
DBG("= %r\n", Status);
return Status;
}
/** EFI_FILE_PROTOCOL.Read - Reads data from a file. */
EFI_STATUS
EFIAPI
FSI_FP_Read(
IN EFI_FILE_PROTOCOL *This,
IN OUT UINTN *BufferSize,
OUT VOID *Buffer
)
{
EFI_STATUS Status = EFI_DEVICE_ERROR;
FSI_FILE_PROTOCOL *FSIThis;
#if DBG_TO
EFI_FILE_INFO *FInfo;
#endif
UINTN BufferSizeOrig;
CHAR8 *String;
FSI_STRING_LIST *StringList;
FSI_STRING_LIST_ENTRY *StringEntry;
VOID *TmpBuffer;
UINTN OrigBufferSize = *BufferSize;
DBG("FSI_FP %p.Read(%d, %p) ", This, *BufferSize, Buffer);
FSIThis = FSI_FROM_FILE_PROTOCOL(This);
if (FSIThis->TgtFP != NULL && FSIThis->SrcFP != NULL) {
// this is injection point
// first read dir entries from Src and then from Tgt
BufferSizeOrig = *BufferSize;
Status = FSIThis->SrcFP->Read(FSIThis->SrcFP, BufferSize, Buffer);
if (*BufferSize == 0) {
// no more in Src - read from Tgt
*BufferSize = BufferSizeOrig;
Status = FSIThis->TgtFP->Read(FSIThis->TgtFP, BufferSize, Buffer);
}
} else if (FSIThis->TgtFP != NULL) {
// do it with target FP
Status = FSIThis->TgtFP->Read(FSIThis->TgtFP, BufferSize, Buffer);
StringList = FSIThis->FSI_FS->ForceLoadKexts;
if (Status == EFI_INVALID_PARAMETER && *BufferSize == 0) {
// On some systems FS driver seems to have alignment restrictions on given buffer.
// UEFIs buffers allocated with standard AllocatePool seem to be aligned properly and reads
// to them always succeed, so we'll try to overcome this by using new allocated buffer.
TmpBuffer = AllocateZeroPool(OrigBufferSize);
*BufferSize = OrigBufferSize;
Status = FSIThis->TgtFP->Read(FSIThis->TgtFP, BufferSize, TmpBuffer);
if (Status == EFI_SUCCESS && *BufferSize > 0) {
CopyMem(Buffer, TmpBuffer, *BufferSize);
}
FreePool(TmpBuffer);
}
if (Status == EFI_SUCCESS && StringList != NULL && FSIThis->FName != NULL) {
// check ForceLoadKexts
for (StringEntry = (FSI_STRING_LIST_ENTRY *)GetFirstNode(&StringList->List);
!IsNull (&StringList->List, &StringEntry->List);
StringEntry = (FSI_STRING_LIST_ENTRY *)GetNextNode(&StringList->List, &StringEntry->List)
)
{
if (StrStr(FSIThis->FName, StringEntry->String) != NULL) {
//Print(L"\nGot: %s\n", FSIThis->FName);
String = AsciiStrStr((CHAR8*)Buffer, "<string>Safe Boot</string>");
if (String != NULL) {
CopyMem(String, "<string>Root</string> ", 26);
Print(L"\nForced load: %s\n", FSIThis->FName);
//gBS->Stall(5000000);
} else {
String = AsciiStrStr((CHAR8*)Buffer, "<string>Network-Root</string>");
if (String != NULL) {
CopyMem(String, "<string>Root</string> ", 29);
Print(L"\nForced load: %s\n", FSIThis->FName);
//gBS->Stall(5000000);
}
}
}
}
}
} else if (FSIThis->SrcFP != NULL) {
// do it with source FP
Status = FSIThis->SrcFP->Read(FSIThis->SrcFP, BufferSize, Buffer);
if (Status == EFI_INVALID_PARAMETER && *BufferSize == 0) {
// On some systems FS driver seems to have alignment restrictions on given buffer.
// UEFIs buffers allocated with standard AllocatePool seem to be aligned properly and reads
// to them always succeed, so we'll try to overcome this by using new allocated buffer.
TmpBuffer = AllocateZeroPool(OrigBufferSize);
*BufferSize = OrigBufferSize;
Status = FSIThis->SrcFP->Read(FSIThis->SrcFP, BufferSize, TmpBuffer);
if (Status == EFI_SUCCESS && *BufferSize > 0) {
CopyMem(Buffer, TmpBuffer, *BufferSize);
}
FreePool(TmpBuffer);
}
}
#if DBG_TO
if (Status == EFI_SUCCESS && FSIThis->IsDir && *BufferSize > 0) {
FInfo = (EFI_FILE_INFO *)Buffer;
DBG("= %r, *BufferSize=%d, dir entry FileName='%s'\n", Status, *BufferSize, FInfo->FileName);
} else {
DBG("= %r, *BufferSize=%d\n", Status, *BufferSize);
}
#endif
return Status;
}
/** EFI_FILE_PROTOCOL.Write - Writes data to a file. */
EFI_STATUS
EFIAPI
FSI_FP_Write(
IN EFI_FILE_PROTOCOL *This,
IN OUT UINTN *BufferSize,
IN VOID *Buffer
)
{
EFI_STATUS Status = EFI_DEVICE_ERROR;
FSI_FILE_PROTOCOL *FSIThis;
DBG("FSI_FP %p.Write(%d, %p) ", This, *BufferSize, Buffer);
FSIThis = FSI_FROM_FILE_PROTOCOL(This);
if (FSIThis->TgtFP != NULL) {
// do it with target FP
Status = FSIThis->TgtFP->Write(FSIThis->TgtFP, BufferSize, Buffer);
} else if (FSIThis->SrcFP != NULL) {
// do it with source FP
Status = FSIThis->SrcFP->Write(FSIThis->SrcFP, BufferSize, Buffer);
}
DBG("= %r, *BufferSize=%d\n", Status, *BufferSize);
return Status;
}
/** EFI_FILE_PROTOCOL.SetPosition - Sets a file's current position. */
EFI_STATUS
EFIAPI
FSI_FP_SetPosition(
IN EFI_FILE_PROTOCOL *This,
IN UINT64 Position
)
{
EFI_STATUS Status = EFI_DEVICE_ERROR;
FSI_FILE_PROTOCOL *FSIThis;
DBG("FSI_FP %p.SetPosition(%d) ", This, Position);
FSIThis = FSI_FROM_FILE_PROTOCOL(This);
if (FSIThis->TgtFP != NULL) {
// do it with target FP
Status = FSIThis->TgtFP->SetPosition(FSIThis->TgtFP, Position);
}
if (FSIThis->SrcFP != NULL) {
// and with Src
Status = FSIThis->SrcFP->SetPosition(FSIThis->SrcFP, Position);
}
DBG("= %r\n", Status);
return Status;
}
/** EFI_FILE_PROTOCOL.GetPosition - Returns a file's current position. */
EFI_STATUS
EFIAPI
FSI_FP_GetPosition(
IN EFI_FILE_PROTOCOL *This,
IN UINT64 *Position
)
{
EFI_STATUS Status = EFI_DEVICE_ERROR;
FSI_FILE_PROTOCOL *FSIThis;
DBG("FSI_FP %p.GetPosition() ", This);
FSIThis = FSI_FROM_FILE_PROTOCOL(This);
if (FSIThis->TgtFP != NULL) {
// do it with target FP
Status = FSIThis->TgtFP->GetPosition(FSIThis->TgtFP, Position);
} else if (FSIThis->SrcFP != NULL) {
// do it with source FP
Status = FSIThis->SrcFP->GetPosition(FSIThis->SrcFP, Position);
}
DBG("= %r, Position=%d\n", Status, Position);
return Status;
}
/** EFI_FILE_PROTOCOL.GetInfo - Returns information about a file. */
EFI_STATUS
EFIAPI
FSI_FP_GetInfo(
IN EFI_FILE_PROTOCOL *This,
IN EFI_GUID *InformationType,
IN OUT UINTN *BufferSize,
OUT VOID *Buffer
)
{
EFI_STATUS Status = EFI_DEVICE_ERROR;
FSI_FILE_PROTOCOL *FSIThis;
EFI_FILE_INFO *FInfo;
DBG("FSI_FP %p.GetInfo(%s, %d, %p) ", This, GuidStr(InformationType), *BufferSize, Buffer);
FSIThis = FSI_FROM_FILE_PROTOCOL(This);
if (FSIThis->TgtFP != NULL) {
// do it with target FP
Status = FSIThis->TgtFP->GetInfo(FSIThis->TgtFP, InformationType, BufferSize, Buffer);
if (Status == EFI_SUCCESS && CompareGuid(InformationType, &gEfiFileInfoGuid)) {
FInfo = (EFI_FILE_INFO *)Buffer;
FSIThis->IsDir = FInfo->Attribute & EFI_FILE_DIRECTORY;
}
} else if (FSIThis->SrcFP != NULL) {
// do it with source FP
Status = FSIThis->SrcFP->GetInfo(FSIThis->SrcFP, InformationType, BufferSize, Buffer);
if (Status == EFI_SUCCESS && CompareGuid(InformationType, &gEfiFileInfoGuid)) {
FInfo = (EFI_FILE_INFO *)Buffer;
FSIThis->IsDir = FInfo->Attribute & EFI_FILE_DIRECTORY;
}
}
DBG("= %r, BufferSize=%d\n", Status, *BufferSize);
return Status;
}
/** EFI_FILE_PROTOCOL.SetInfo - Sets information about a file. */
EFI_STATUS
EFIAPI
FSI_FP_SetInfo(
IN EFI_FILE_PROTOCOL *This,
IN EFI_GUID *InformationType,
IN UINTN BufferSize,
IN VOID *Buffer
)
{
EFI_STATUS Status = EFI_DEVICE_ERROR;
FSI_FILE_PROTOCOL *FSIThis;
DBG("FSI_FP %p.SetInfo(%s, %d, %p) ", This, GuidStr(InformationType), BufferSize, Buffer);
FSIThis = FSI_FROM_FILE_PROTOCOL(This);
if (FSIThis->TgtFP != NULL) {
// do it with target FP
Status = FSIThis->TgtFP->SetInfo(FSIThis->TgtFP, InformationType, BufferSize, Buffer);
} else if (FSIThis->SrcFP != NULL) {
// do it with source FP
Status = FSIThis->SrcFP->SetInfo(FSIThis->SrcFP, InformationType, BufferSize, Buffer);
}
DBG("= %r\n", Status);
return Status;
}
/** EFI_FILE_PROTOCOL.Flush - Flushes all modified data associated with a file to a device. */
EFI_STATUS
EFIAPI
FSI_FP_Flush(
IN EFI_FILE_PROTOCOL *This
)
{
EFI_STATUS Status = EFI_DEVICE_ERROR;
FSI_FILE_PROTOCOL *FSIThis;
DBG("FSI_FP %p.Flush() ", This);
FSIThis = FSI_FROM_FILE_PROTOCOL(This);
if (FSIThis->TgtFP != NULL) {
// do it with target FP
Status = FSIThis->TgtFP->Flush(FSIThis->TgtFP);
} else if (FSIThis->SrcFP != NULL) {
// do it with source FP
Status = FSIThis->SrcFP->Flush(FSIThis->SrcFP);
}
DBG("= %r\n", Status);
return Status;
}
/** Creates our FSI_FILE_PROTOCOL. */
FSI_FILE_PROTOCOL*
EFIAPI
CreateFSInjectFP(VOID)
{
FSI_FILE_PROTOCOL *FSINew;
// wrap it into our implementation
FSINew = AllocateZeroPool(sizeof(FSI_FILE_PROTOCOL));
if (FSINew == NULL) {
return NULL;
}
FSINew->Signature = FSI_FILE_PROTOCOL_SIGNATURE;
FSINew->FP.Revision = EFI_FILE_PROTOCOL_REVISION;
FSINew->FP.Open = FSI_FP_Open;
FSINew->FP.Close = FSI_FP_Close;
FSINew->FP.Delete = FSI_FP_Delete;
FSINew->FP.Read = FSI_FP_Read;
FSINew->FP.Write = FSI_FP_Write;
FSINew->FP.GetPosition = FSI_FP_GetPosition;
FSINew->FP.SetPosition = FSI_FP_SetPosition;
FSINew->FP.GetInfo = FSI_FP_GetInfo;
FSINew->FP.SetInfo = FSI_FP_SetInfo;
FSINew->FP.Flush = FSI_FP_Flush;
FSINew->FSI_FS = NULL;
FSINew->FName = NULL;
FSINew->IsDir = FALSE;
FSINew->TgtFP = NULL;
FSINew->SrcFP = NULL;
FSINew->FromTgt = FALSE;
return FSINew;
}
/**************************************************************************************
* FSI_SIMPLE_FILE_SYSTEM_PROTOCOL - our implementation of EFI_SIMPLE_FILE_SYSTEM_PROTOCOL
**************************************************************************************/
/**
* EFI_SIMPLE_FILE_SYSTEM_PROTOCOL.OpenVolume implementation.
*/
EFI_STATUS
EFIAPI
FSI_SFS_OpenVolume(
IN EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *This,
OUT EFI_FILE_PROTOCOL **Root
)
{
EFI_STATUS Status;
FSI_SIMPLE_FILE_SYSTEM_PROTOCOL *FSIThis;
FSI_FILE_PROTOCOL *FSINew;
DBG("FSI_FS %p.OpenVolume() ", This);
FSIThis = FSI_FROM_SIMPLE_FILE_SYSTEM(This);
// do it with target FS
Status = FSIThis->TgtFS->OpenVolume(FSIThis->TgtFS, Root);
if (EFI_ERROR(Status)) {
DBG("TgtFS->OpenVolume Status=%r\n", Status);
return Status;
}
// wrap it into our implementation
FSINew = CreateFSInjectFP();
if (FSINew == NULL) {
Status = EFI_OUT_OF_RESOURCES;
DBG("CreateFSInjectFP: %r\n", Status);
return Status;
}
FSINew->FSI_FS = FSIThis; // saving reference to parent FS protocol
FSINew->FName = AllocateCopyPool(StrSize(L"\\"), L"\\");
FSINew->TgtFP = *Root;
FSINew->SrcFP = NULL;
FSINew->FromTgt = TRUE;
// set it as result
*Root = &FSINew->FP;
DBG("= %r, returning Root=%p\n", Status, *Root);
return Status;
}
/**************************************************************************************
* FSINJECTION_PROTOCOL
**************************************************************************************/
/**
* FSINJECTION_PROTOCOL.Install implementation.
*/
EFI_STATUS
EFIAPI
FSInjectionInstall (
IN EFI_HANDLE TgtHandle,
IN CHAR16 *TgtDir,
IN EFI_HANDLE SrcHandle,
IN CHAR16 *SrcDir,
IN FSI_STRING_LIST *Blacklist,
IN FSI_STRING_LIST *ForceLoadKexts
)
{
EFI_STATUS Status;
EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *TgtFS;
EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *SrcFS;
FSI_SIMPLE_FILE_SYSTEM_PROTOCOL *OurFS;
DBG("FSInjectionInstall ...\n");
// get existing target EFI_SIMPLE_FILE_SYSTEM_PROTOCOL
Status = gBS->OpenProtocol(TgtHandle, &gEfiSimpleFileSystemProtocolGuid, (void **)&TgtFS, gImageHandle, NULL, EFI_OPEN_PROTOCOL_GET_PROTOCOL);
if (EFI_ERROR(Status)) {
DBG("- target OpenProtocol(gEfiSimpleFileSystemProtocolGuid): %r\n", Status);
return Status;
}
// get existing source EFI_SIMPLE_FILE_SYSTEM_PROTOCOL
Status = gBS->OpenProtocol(SrcHandle, &gEfiSimpleFileSystemProtocolGuid, (void **)&SrcFS, gImageHandle, NULL, EFI_OPEN_PROTOCOL_GET_PROTOCOL);
if (EFI_ERROR(Status)) {
DBG("- source OpenProtocol(gEfiSimpleFileSystemProtocolGuid): %r\n", Status);
return Status;
}
// create our implementation
OurFS = AllocateZeroPool(sizeof(FSI_SIMPLE_FILE_SYSTEM_PROTOCOL));
if (OurFS == NULL) {
Status = EFI_OUT_OF_RESOURCES;
DBG("- AllocateZeroPool(FSI_SIMPLE_FILE_SYSTEM_PROTOCOL): %r\n", Status);
return Status;
}
OurFS->Signature = FSI_SIMPLE_FILE_SYSTEM_PROTOCOL_SIGNATURE;
OurFS->FS.Revision = EFI_SIMPLE_FILE_SYSTEM_PROTOCOL_REVISION;
OurFS->FS.OpenVolume = FSI_SFS_OpenVolume;
OurFS->TgtHandle = TgtHandle;
OurFS->TgtFS = TgtFS;
OurFS->TgtDir = AllocateCopyPool(StrSize(TgtDir), TgtDir);
if (OurFS->TgtDir == NULL) {
Status = EFI_OUT_OF_RESOURCES;
DBG("- AllocateCopyPool for TgtDir: %r\n", Status);
goto ErrorExit;
}
OurFS->SrcHandle = SrcHandle;
OurFS->SrcFS = SrcFS;
// we can run without SrcDir - no injection, but blocking caches for example
if (SrcDir != NULL) {
OurFS->SrcDir = AllocateCopyPool(StrSize(SrcDir), SrcDir);
if (OurFS->SrcDir == NULL) {
Status = EFI_OUT_OF_RESOURCES;
DBG("- AllocateCopyPool for TgtDir or SrcDir: %r\n", Status);
goto ErrorExit;
}
}
if (Blacklist != NULL && !IsListEmpty(&Blacklist->List)) {
OurFS->Blacklist = Blacklist;
}
if (ForceLoadKexts != NULL && !IsListEmpty(&ForceLoadKexts->List)) {
OurFS->ForceLoadKexts = ForceLoadKexts;
}
// replace existing tagret EFI_SIMPLE_FILE_SYSTEM_PROTOCOL with out implementation
Status = gBS->ReinstallProtocolInterface(TgtHandle, &gEfiSimpleFileSystemProtocolGuid, TgtFS, &OurFS->FS);
if (EFI_ERROR(Status)) {
DBG("- ReinstallProtocolInterface(): %r\n", Status);
return Status;
}
DBG("- Our FSI_SIMPLE_FILE_SYSTEM_PROTOCOL installed on handle: %X\n", TgtHandle);
return EFI_SUCCESS;
ErrorExit:
if (OurFS->TgtDir != NULL) FreePool(OurFS->TgtDir);
if (OurFS->SrcDir != NULL) FreePool(OurFS->SrcDir);
FreePool(OurFS);
return Status;
}
/**
* FSINJECTION_PROTOCOL.CreateStringList() implementation.
*/
FSI_STRING_LIST *
EFIAPI
FSInjectionCreateStringList(VOID)
{
FSI_STRING_LIST *List;
List = AllocateZeroPool(sizeof(FSI_STRING_LIST));
if (List != NULL) {
InitializeListHead(&List->List);
}
return List;
}
/**
* FSINJECTION_PROTOCOL.AddStringToList() implementation.
*/
FSI_STRING_LIST *
EFIAPI
FSInjectionAddStringToList(FSI_STRING_LIST *List, CHAR16 *String)
{
FSI_STRING_LIST_ENTRY *Entry;
UINTN StringSize;
if (List == NULL || String == NULL) {
return NULL;
}
StringSize = StrSize(String); // num of bytes, including null terminator
Entry = AllocateZeroPool(sizeof(FSI_STRING_LIST_ENTRY) + StringSize);
if (Entry != NULL) {
StrCpyS(Entry->String, StringSize/sizeof(CHAR16), String);
InsertTailList(&List->List, &Entry->List);
}
return Entry != NULL ? List : NULL;
}
/**
* Installs FSINJECTION_PROTOCOL to na new handle/
*/
EFI_STATUS
EFIAPI
InstallFSInjectionProtocol (VOID)
{
EFI_STATUS Status;
FSINJECTION_PROTOCOL *FSInjection;
EFI_HANDLE FSIHandle;
// install FSINJECTION_PROTOCOL to new handle
FSInjection = AllocateZeroPool(sizeof(FSINJECTION_PROTOCOL));
if (FSInjection == NULL) {
DBG("Can not allocate memory for FSINJECTION_PROTOCOL\n");
return EFI_OUT_OF_RESOURCES;
}
FSInjection->Install = FSInjectionInstall;
FSInjection->CreateStringList = FSInjectionCreateStringList;
FSInjection->AddStringToList = FSInjectionAddStringToList;
FSIHandle = NULL; // install to new handle
Status = gBS->InstallMultipleProtocolInterfaces(&FSIHandle, &gFSInjectProtocolGuid, FSInjection, NULL);
if (EFI_ERROR(Status)) {
DBG("InstallFSInjectionProtocol: error installing FSINJECTION_PROTOCOL, Status = %r\n", Status);
}
return Status;
}
/**************************************************************************************
* Entry point
**************************************************************************************/
/**
* FSInjection entry point. Installs FSINJECTION_PROTOCOL.
*/
EFI_STATUS
EFIAPI
FSInjectEntrypoint (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
#if TEST
FSI_STRING_LIST *Blacklist;
#endif
Status = InstallFSInjectionProtocol();
if (EFI_ERROR(Status)) {
return Status;
}
#if TEST
Blacklist = FSInjectionCreateStringList();
// Caution! Do not add this list. If add this list, will see "Kernel cache load error (0xe)". This is just a guideline.
// by Sherlocks, 2017.11
// Installed/createinstallmedia
//FSInjectionAddStringToList(Blacklist, L"\\System\\Library\\PrelinkedKernels\\prelinkedkernel"); // 10.10+/10.13.4+
// Recovery
//FSInjectionAddStringToList(Blacklist, L"\\com.apple.recovery.boot\\kernelcache"); // 10.7 - 10.10
//FSInjectionAddStringToList(Blacklist, L"\\com.apple.recovery.boot\\prelinkedkernel"); // 10.11+
// BaseSytem/InstallESD
//FSInjectionAddStringToList(Blacklist, L"\\kernelcache"); // 10.7 - 10.9/(10.7/10.8)
// 1st stage - createinstallmedia
//FSInjectionAddStringToList(Blacklist, L"\\.IABootFiles\\kernelcache"); // 10.9/10.10
//FSInjectionAddStringToList(Blacklist, L"\\.IABootFiles\\prelinkedkernel"); // 10.11 - 10.13.3
// 2nd stage - InstallESD/AppStore/startosinstall
//FSInjectionAddStringToList(Blacklist, L"\\Mac OS X Install Data\\kernelcache"); // 10.7
//FSInjectionAddStringToList(Blacklist, L"\\OS X Install Data\\kernelcache"); // 10.8 - 10.10
//FSInjectionAddStringToList(Blacklist, L"\\OS X Install Data\\prelinkedkernel"); // 10.11
//FSInjectionAddStringToList(Blacklist, L"\\macOS Install Data\\prelinkedkernel"); // 10.12 - 10.12.3
//FSInjectionAddStringToList(Blacklist, L"\\macOS Install Data\\Locked Files\\Boot Files\\prelinkedkernel"); // 10.12.4+
// 2nd stage - Fusion Drive
//FSInjectionAddStringToList(Blacklist, L"\\com.apple.boot.R\\System\\Library\\PrelinkedKernels\\prelinkedkernel"); // 10.11
//FSInjectionAddStringToList(Blacklist, L"\\com.apple.boot.P\\System\\Library\\PrelinkedKernels\\prelinkedkernel"); // 10.11
//FSInjectionAddStringToList(Blacklist, L"\\com.apple.boot.S\\System\\Library\\PrelinkedKernels\\prelinkedkernel"); // 10.11
//FSInjectionAddStringToList(Blacklist, L"\\com.apple.boot.R\\prelinkedkernel"); // 10.12+
//FSInjectionAddStringToList(Blacklist, L"\\com.apple.boot.P\\prelinkedkernel"); // 10.12+
//FSInjectionAddStringToList(Blacklist, L"\\com.apple.boot.S\\prelinkedkernel"); // 10.12+
// NetInstall
//FSInjectionAddStringToList(Blacklist, L"\\NetInstall macOS High Sierra.nbi\\i386\\x86_64\\kernelcache");
// Block Caches list
// InstallDVD/Installed
FSInjectionAddStringToList(Blacklist, L"\\System\\Library\\Caches\\com.apple.kext.caches\\Startup\\Extensions.mkext"); // 10.6
FSInjectionAddStringToList(Blacklist, L"\\System\\Library\\Extensions.mkext"); // 10.6
FSInjectionAddStringToList(Blacklist, L"\\System\\Library\\Caches\\com.apple.kext.caches\\Startup\\kernelcache"); // 10.6/10.6 - 10.9
Status = InstallTestFSinjection(L"\\Users\\dmazar", L"\\efi\\kext\\10_7", Blacklist, NULL);
if (EFI_ERROR(Status)) {
return Status;
}
#endif
return EFI_SUCCESS;
}
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