diff options
Diffstat (limited to 'EdkModulePkg/Library/EdkIfrSupportLib/IfrCommon.c')
| -rw-r--r-- | EdkModulePkg/Library/EdkIfrSupportLib/IfrCommon.c | 1000 |
1 files changed, 0 insertions, 1000 deletions
diff --git a/EdkModulePkg/Library/EdkIfrSupportLib/IfrCommon.c b/EdkModulePkg/Library/EdkIfrSupportLib/IfrCommon.c deleted file mode 100644 index b2c906476d..0000000000 --- a/EdkModulePkg/Library/EdkIfrSupportLib/IfrCommon.c +++ /dev/null @@ -1,1000 +0,0 @@ -/*++
-Copyright (c) 2006, Intel Corporation
-All rights reserved. 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
-http://opensource.org/licenses/bsd-license.php
-
-THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
-WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
-
-Module Name:
- IfrCommon.c
-
-Abstract:
-
- Common Library Routines to assist in IFR creation on-the-fly
-
-Revision History:
-
---*/
-
-EFI_STATUS
-EFIAPI
-IfrLibConstruct (
- IN EFI_HANDLE ImageHandle,
- IN EFI_SYSTEM_TABLE *SystemTable
- )
-{
- return EFI_SUCCESS;
-}
-
-EFI_STATUS
-GetCurrentLanguage (
- OUT CHAR16 *Lang
- )
-/*++
-
-Routine Description:
-
- Determine what is the current language setting
-
-Arguments:
-
- Lang - Pointer of system language
-
-Returns:
-
- Status code
-
---*/
-{
- EFI_STATUS Status;
- UINTN Size;
- UINTN Index;
- CHAR8 Language[4];
-
- //
- // Getting the system language and placing it into our Global Data
- //
- Size = sizeof (Language);
-
- Status = gRT->GetVariable (
- (CHAR16 *) L"Lang",
- &gEfiGlobalVariableGuid,
- NULL,
- &Size,
- Language
- );
-
- if (EFI_ERROR (Status)) {
- AsciiStrCpy (Language, "eng");
- }
-
- for (Index = 0; Index < 3; Index++) {
- //
- // Bitwise AND ascii value with 0xDF yields an uppercase value.
- // Sign extend into a unicode value
- //
- Lang[Index] = (CHAR16) (Language[Index] & 0xDF);
- }
-
- //
- // Null-terminate the value
- //
- Lang[3] = (CHAR16) 0;
-
- return Status;
-}
-
-
-EFI_STATUS
-AddString (
- IN VOID *StringBuffer,
- IN CHAR16 *Language,
- IN CHAR16 *String,
- IN OUT STRING_REF *StringToken
- )
-/*++
-
-Routine Description:
-
- Add a string to the incoming buffer and return the token and offset data
-
-Arguments:
-
- StringBuffer - The incoming buffer
-
- Language - Currrent language
-
- String - The string to be added
-
- StringToken - The index where the string placed
-
-Returns:
-
- EFI_OUT_OF_RESOURCES - No enough buffer to allocate
-
- EFI_SUCCESS - String successfully added to the incoming buffer
-
---*/
-{
- EFI_HII_STRING_PACK *StringPack;
- EFI_HII_STRING_PACK *StringPackBuffer;
- VOID *NewBuffer;
- RELOFST *PackSource;
- RELOFST *PackDestination;
- UINT8 *Source;
- UINT8 *Destination;
- UINTN Index;
- BOOLEAN Finished;
- UINTN SizeofLanguage;
- UINTN SizeofString;
-
- StringPack = (EFI_HII_STRING_PACK *) StringBuffer;
- Finished = FALSE;
-
- //
- // Pre-allocate a buffer sufficient for us to work on.
- // We will use it as a destination scratch pad to build data on
- // and when complete shift the data back to the original buffer
- //
- NewBuffer = AllocateZeroPool (DEFAULT_STRING_BUFFER_SIZE);
- if (NewBuffer == NULL) {
- return EFI_OUT_OF_RESOURCES;
- }
-
- StringPackBuffer = (EFI_HII_STRING_PACK *) NewBuffer;
-
- //
- // StringPack is terminated with a length 0 entry
- //
- for (; StringPack->Header.Length != 0;) {
- //
- // If this stringpack's language is same as CurrentLanguage, use it
- //
- if (CompareMem ((VOID *) ((CHAR8 *) (StringPack) + StringPack->LanguageNameString), Language, 3) == 0) {
- //
- // We have some data in this string pack, copy the string package up to the string data
- //
- CopyMem (&StringPackBuffer->Header, &StringPack->Header, sizeof (StringPack));
-
- //
- // These are references in the structure to tokens, need to increase them by the space occupied by an additional StringPointer
- //
- StringPackBuffer->LanguageNameString = (UINT16) (StringPackBuffer->LanguageNameString + (UINT16) sizeof (RELOFST));
- StringPackBuffer->PrintableLanguageName = (UINT16) (StringPackBuffer->PrintableLanguageName + (UINT16) sizeof (RELOFST));
-
- PackSource = (RELOFST *) (StringPack + 1);
- PackDestination = (RELOFST *) (StringPackBuffer + 1);
- for (Index = 0; PackSource[Index] != 0x0000; Index++) {
- //
- // Copy the stringpointers from old to new buffer
- // remember that we are adding a string, so the string offsets will all go up by sizeof (RELOFST)
- //
- PackDestination[Index] = (UINT16) (PackDestination[Index] + sizeof (RELOFST));
- }
-
- //
- // Add a new stringpointer in the new buffer since we are adding a string. Null terminate it
- //
- PackDestination[Index] = (UINT16)(PackDestination[Index-1] +
- StrSize((CHAR16 *)((CHAR8 *)(StringPack) + PackSource[Index-1])));
- PackDestination[Index + 1] = (UINT16) 0;
-
- //
- // Index is the token value for the new string
- //
- *StringToken = (UINT16) Index;
-
- //
- // Source now points to the beginning of the old buffer strings
- // Destination now points to the beginning of the new buffer strings
- //
- Source = (UINT8 *) &PackSource[Index + 1];
- Destination = (UINT8 *) &PackDestination[Index + 2];
-
- //
- // This should copy all the strings from the old buffer to the new buffer
- //
- for (; Index != 0; Index--) {
- //
- // Copy Source string to destination buffer
- //
- StrCpy ((CHAR16 *) Destination, (CHAR16 *) Source);
-
- //
- // Adjust the source/destination to the next string location
- //
- Destination = Destination + StrSize ((CHAR16 *) Source);
- Source = Source + StrSize ((CHAR16 *) Source);
- }
-
- //
- // This copies the new string to the destination buffer
- //
- StrCpy ((CHAR16 *) Destination, (CHAR16 *) String);
-
- //
- // Adjust the size of the changed string pack by adding the size of the new string
- // along with the size of the additional offset entry for the new string
- //
- StringPackBuffer->Header.Length = (UINT32) ((UINTN) StringPackBuffer->Header.Length + StrSize (String) + sizeof (RELOFST));
-
- //
- // Advance the buffers to point to the next spots.
- //
- StringPackBuffer = (EFI_HII_STRING_PACK *) ((CHAR8 *) (StringPackBuffer) + StringPackBuffer->Header.Length);
- StringPack = (EFI_HII_STRING_PACK *) ((CHAR8 *) (StringPack) + StringPack->Header.Length);
- Finished = TRUE;
- continue;
- }
- //
- // This isn't the language of the stringpack we were asked to add a string to
- // so we need to copy it to the new buffer.
- //
- CopyMem (&StringPackBuffer->Header, &StringPack->Header, StringPack->Header.Length);
-
- //
- // Advance the buffers to point to the next spots.
- //
- StringPackBuffer = (EFI_HII_STRING_PACK *) ((CHAR8 *) (StringPackBuffer) + StringPack->Header.Length);
- StringPack = (EFI_HII_STRING_PACK *) ((CHAR8 *) (StringPack) + StringPack->Header.Length);
- }
-
- //
- // If we didn't copy the new data to a stringpack yet
- //
- if (!Finished) {
- PackDestination = (RELOFST *) (StringPackBuffer + 1);
- //
- // Pointing to a new string pack location
- //
- SizeofLanguage = StrSize (Language);
- SizeofString = StrSize (String);
- StringPackBuffer->Header.Length = (UINT32)
- (
- sizeof (EFI_HII_STRING_PACK) -
- sizeof (EFI_STRING) +
- sizeof (RELOFST) +
- sizeof (RELOFST) +
- SizeofLanguage +
- SizeofString
- );
- StringPackBuffer->Header.Type = EFI_HII_STRING;
- StringPackBuffer->LanguageNameString = (UINT16) ((UINTN) &PackDestination[3] - (UINTN) StringPackBuffer);
- StringPackBuffer->PrintableLanguageName = (UINT16) ((UINTN) &PackDestination[3] - (UINTN) StringPackBuffer);
- StringPackBuffer->Attributes = 0;
- PackDestination[0] = (UINT16) ((UINTN) &PackDestination[3] - (UINTN) StringPackBuffer);
- PackDestination[1] = (UINT16) (PackDestination[0] + StrSize (Language));
- PackDestination[2] = (UINT16) 0;
-
- //
- // The first string location will be set to destination. The minimum number of strings
- // associated with a stringpack will always be token 0 stored as the languagename (e.g. ENG, SPA, etc)
- // and token 1 as the new string being added and and null entry for the stringpointers
- //
- Destination = (UINT8 *) &PackDestination[3];
-
- //
- // Copy the language name string to the new buffer
- //
- StrCpy ((CHAR16 *) Destination, Language);
-
- //
- // Advance the destination to the new empty spot
- //
- Destination = Destination + StrSize (Language);
-
- //
- // Copy the string to the new buffer
- //
- StrCpy ((CHAR16 *) Destination, String);
-
- //
- // Since we are starting with a new string pack - we know the new string is token 1
- //
- *StringToken = (UINT16) 1;
- }
-
- //
- // Zero out the original buffer and copy the updated data in the new buffer to the old buffer
- //
- ZeroMem (StringBuffer, DEFAULT_STRING_BUFFER_SIZE);
- CopyMem (StringBuffer, NewBuffer, DEFAULT_STRING_BUFFER_SIZE);
-
- //
- // Free the newly created buffer since we don't need it anymore
- //
- gBS->FreePool (NewBuffer);
- return EFI_SUCCESS;
-}
-
-
-EFI_STATUS
-AddOpCode (
- IN VOID *FormBuffer,
- IN OUT VOID *OpCodeData
- )
-/*++
-
-Routine Description:
-
- Add op-code data to the FormBuffer
-
-Arguments:
-
- FormBuffer - Form buffer to be inserted to
-
- OpCodeData - Op-code data to be inserted
-
-Returns:
-
- EFI_OUT_OF_RESOURCES - No enough buffer to allocate
-
- EFI_SUCCESS - Op-code data successfully inserted
-
---*/
-{
- EFI_HII_PACK_HEADER *NewBuffer;
- UINT8 *Source;
- UINT8 *Destination;
-
- //
- // Pre-allocate a buffer sufficient for us to work on.
- // We will use it as a destination scratch pad to build data on
- // and when complete shift the data back to the original buffer
- //
- NewBuffer = AllocateZeroPool (DEFAULT_FORM_BUFFER_SIZE);
- if (NewBuffer == NULL) {
- return EFI_OUT_OF_RESOURCES;
- }
-
- Source = (UINT8 *) FormBuffer;
- Destination = (UINT8 *) NewBuffer;
-
- //
- // Copy the IFR Package header to the new buffer
- //
- CopyMem (Destination, Source, sizeof (EFI_HII_PACK_HEADER));
-
- //
- // Advance Source and Destination to next op-code
- //
- Source = Source + sizeof (EFI_HII_PACK_HEADER);
- Destination = Destination + sizeof (EFI_HII_PACK_HEADER);
-
- //
- // Copy data to the new buffer until we run into the end_form
- //
- for (; ((EFI_IFR_OP_HEADER *) Source)->OpCode != EFI_IFR_END_FORM_OP;) {
- //
- // If the this opcode is an end_form_set we better be creating and endform
- // Nonetheless, we will add data before the end_form_set. This also provides
- // for interesting behavior in the code we will run, but has no bad side-effects
- // since we will possibly do a 0 byte copy in this particular end-case.
- //
- if (((EFI_IFR_OP_HEADER *) Source)->OpCode == EFI_IFR_END_FORM_SET_OP) {
- break;
- }
-
- //
- // Copy data to new buffer
- //
- CopyMem (Destination, Source, ((EFI_IFR_OP_HEADER *) Source)->Length);
-
- //
- // Adjust Source/Destination to next op-code location
- //
- Destination = Destination + (UINTN) ((EFI_IFR_OP_HEADER *) Source)->Length;
- Source = Source + (UINTN) ((EFI_IFR_OP_HEADER *) Source)->Length;
- }
-
- //
- // Prior to the end_form is where we insert the new op-code data
- //
- CopyMem (Destination, OpCodeData, ((EFI_IFR_OP_HEADER *) OpCodeData)->Length);
- Destination = Destination + (UINTN) ((EFI_IFR_OP_HEADER *) OpCodeData)->Length;
-
- NewBuffer->Length = (UINT32) (NewBuffer->Length + (UINT32) (((EFI_IFR_OP_HEADER *) OpCodeData)->Length));
-
- //
- // Copy end-form data to new buffer
- //
- CopyMem (Destination, Source, ((EFI_IFR_OP_HEADER *) Source)->Length);
-
- //
- // Adjust Source/Destination to next op-code location
- //
- Destination = Destination + (UINTN) ((EFI_IFR_OP_HEADER *) Source)->Length;
- Source = Source + (UINTN) ((EFI_IFR_OP_HEADER *) Source)->Length;
-
- //
- // Copy end-formset data to new buffer
- //
- CopyMem (Destination, Source, ((EFI_IFR_OP_HEADER *) Source)->Length);
-
- //
- // Zero out the original buffer and copy the updated data in the new buffer to the old buffer
- //
- ZeroMem (FormBuffer, DEFAULT_FORM_BUFFER_SIZE);
- CopyMem (FormBuffer, NewBuffer, DEFAULT_FORM_BUFFER_SIZE);
-
- //
- // Free the newly created buffer since we don't need it anymore
- //
- gBS->FreePool (NewBuffer);
- return EFI_SUCCESS;
-}
-
-STATIC
-EFI_STATUS
-GetHiiInterface (
- OUT EFI_HII_PROTOCOL **Hii
- )
-/*++
-
-Routine Description:
-
- Get the HII protocol interface
-
-Arguments:
-
- Hii - HII protocol interface
-
-Returns:
-
- Status code
-
---*/
-{
- EFI_STATUS Status;
-
- //
- // There should only be one HII protocol
- //
- Status = gBS->LocateProtocol (
- &gEfiHiiProtocolGuid,
- NULL,
- (VOID **) Hii
- );
-
- return Status;;
-}
-
-
-EFI_STATUS
-ExtractDataFromHiiHandle (
- IN EFI_HII_HANDLE HiiHandle,
- IN OUT UINT16 *ImageLength,
- OUT UINT8 *DefaultImage,
- OUT EFI_GUID *Guid
- )
-/*++
-
-Routine Description:
-
- Extract information pertaining to the HiiHandle
-
-Arguments:
-
- HiiHandle - Hii handle
-
- ImageLength - For input, length of DefaultImage;
- For output, length of actually required
-
- DefaultImage - Image buffer prepared by caller
-
- Guid - Guid information about the form
-
-Returns:
-
- EFI_OUT_OF_RESOURCES - No enough buffer to allocate
-
- EFI_BUFFER_TOO_SMALL - DefualtImage has no enough ImageLength
-
- EFI_SUCCESS - Successfully extract data from Hii database.
-
-
---*/
-{
- EFI_STATUS Status;
- EFI_HII_PROTOCOL *Hii;
- UINTN DataLength;
- UINT8 *RawData;
- UINT8 *OldData;
- UINTN Index;
- UINTN Temp;
- UINTN SizeOfNvStore;
- UINTN CachedStart;
-
- DataLength = DEFAULT_FORM_BUFFER_SIZE;
- SizeOfNvStore = 0;
- CachedStart = 0;
-
- Status = GetHiiInterface (&Hii);
-
- if (EFI_ERROR (Status)) {
- return Status;
- }
-
- //
- // Allocate space for retrieval of IFR data
- //
- RawData = AllocateZeroPool (DataLength);
- if (RawData == NULL) {
- return EFI_OUT_OF_RESOURCES;
- }
-
- //
- // Get all the forms associated with this HiiHandle
- //
- Status = Hii->GetForms (Hii, HiiHandle, 0, &DataLength, RawData);
-
- if (EFI_ERROR (Status)) {
- gBS->FreePool (RawData);
-
- //
- // Allocate space for retrieval of IFR data
- //
- RawData = AllocateZeroPool (DataLength);
- if (RawData == NULL) {
- return EFI_OUT_OF_RESOURCES;
- }
-
- //
- // Get all the forms associated with this HiiHandle
- //
- Status = Hii->GetForms (Hii, HiiHandle, 0, &DataLength, RawData);
- }
-
- OldData = RawData;
-
- //
- // Point RawData to the beginning of the form data
- //
- RawData = (UINT8 *) ((UINTN) RawData + sizeof (EFI_HII_PACK_HEADER));
-
- for (Index = 0; RawData[Index] != EFI_IFR_END_FORM_SET_OP;) {
- switch (RawData[Index]) {
- case EFI_IFR_FORM_SET_OP:
- //
- // Copy the GUID information from this handle
- //
- CopyMem (Guid, &((EFI_IFR_FORM_SET *) &RawData[Index])->Guid, sizeof (EFI_GUID));
- break;
-
- case EFI_IFR_ONE_OF_OP:
- case EFI_IFR_CHECKBOX_OP:
- case EFI_IFR_NUMERIC_OP:
- case EFI_IFR_DATE_OP:
- case EFI_IFR_TIME_OP:
- case EFI_IFR_PASSWORD_OP:
- case EFI_IFR_STRING_OP:
- //
- // Remember, multiple op-codes may reference the same item, so let's keep a running
- // marker of what the highest QuestionId that wasn't zero length. This will accurately
- // maintain the Size of the NvStore
- //
- if (((EFI_IFR_ONE_OF *) &RawData[Index])->Width != 0) {
- Temp = ((EFI_IFR_ONE_OF *) &RawData[Index])->QuestionId + ((EFI_IFR_ONE_OF *) &RawData[Index])->Width;
- if (SizeOfNvStore < Temp) {
- SizeOfNvStore = ((EFI_IFR_ONE_OF *) &RawData[Index])->QuestionId + ((EFI_IFR_ONE_OF *) &RawData[Index])->Width;
- }
- }
- }
-
- Index = RawData[Index + 1] + Index;
- }
-
- //
- // Return an error if buffer is too small
- //
- if (SizeOfNvStore > *ImageLength) {
- gBS->FreePool (OldData);
- *ImageLength = (UINT16) SizeOfNvStore;
- return EFI_BUFFER_TOO_SMALL;
- }
-
- if (DefaultImage != NULL) {
- ZeroMem (DefaultImage, SizeOfNvStore);
- }
-
- //
- // Copy the default image information to the user's buffer
- //
- for (Index = 0; RawData[Index] != EFI_IFR_END_FORM_SET_OP;) {
- switch (RawData[Index]) {
- case EFI_IFR_ONE_OF_OP:
- CachedStart = ((EFI_IFR_ONE_OF *) &RawData[Index])->QuestionId;
- break;
-
- case EFI_IFR_ONE_OF_OPTION_OP:
- if (((EFI_IFR_ONE_OF_OPTION *) &RawData[Index])->Flags & EFI_IFR_FLAG_DEFAULT) {
- CopyMem (&DefaultImage[CachedStart], &((EFI_IFR_ONE_OF_OPTION *) &RawData[Index])->Value, 2);
- }
- break;
-
- case EFI_IFR_CHECKBOX_OP:
- DefaultImage[((EFI_IFR_ONE_OF *) &RawData[Index])->QuestionId] = ((EFI_IFR_CHECKBOX *) &RawData[Index])->Flags;
- break;
-
- case EFI_IFR_NUMERIC_OP:
- CopyMem (
- &DefaultImage[((EFI_IFR_ONE_OF *) &RawData[Index])->QuestionId],
- &((EFI_IFR_NUMERIC *) &RawData[Index])->Default,
- 2
- );
- break;
-
- }
-
- Index = RawData[Index + 1] + Index;
- }
-
- *ImageLength = (UINT16) SizeOfNvStore;
-
- //
- // Free our temporary repository of form data
- //
- gBS->FreePool (OldData);
-
- return EFI_SUCCESS;
-}
-
-
-EFI_HII_HANDLE
-FindHiiHandle (
- IN OUT EFI_HII_PROTOCOL **HiiProtocol, OPTIONAL
- IN EFI_GUID *Guid
- )
-/*++
-
-Routine Description:
- Finds HII handle for given pack GUID previously registered with the HII.
-
-Arguments:
- HiiProtocol - pointer to pointer to HII protocol interface.
- If NULL, the interface will be found but not returned.
- If it points to NULL, the interface will be found and
- written back to the pointer that is pointed to.
- Guid - The GUID of the pack that registered with the HII.
-
-Returns:
- Handle to the HII pack previously registered by the memory driver.
-
---*/
-{
- EFI_STATUS Status;
-
- EFI_HII_HANDLE *HiiHandleBuffer;
- EFI_HII_HANDLE HiiHandle;
- UINT16 HiiHandleBufferLength;
- UINT32 NumberOfHiiHandles;
- EFI_GUID HiiGuid;
- EFI_HII_PROTOCOL *HiiProt;
- UINT32 Index;
- UINT16 Length;
-
- HiiHandle = 0;
- if ((HiiProtocol != NULL) && (*HiiProtocol != NULL)) {
- //
- // The protocol has been passed in
- //
- HiiProt = *HiiProtocol;
- } else {
- gBS->LocateProtocol (
- &gEfiHiiProtocolGuid,
- NULL,
- (VOID **) &HiiProt
- );
- if (HiiProt == NULL) {
- return HiiHandle;
- }
-
- if (HiiProtocol != NULL) {
- //
- // Return back the HII protocol for the caller as promissed
- //
- *HiiProtocol = HiiProt;
- }
- }
- //
- // Allocate buffer
- //
- HiiHandleBufferLength = 10;
- HiiHandleBuffer = AllocatePool (HiiHandleBufferLength);
- ASSERT (HiiHandleBuffer != NULL);
-
- //
- // Get the Handles of the packages that were registered with Hii
- //
- Status = HiiProt->FindHandles (
- HiiProt,
- &HiiHandleBufferLength,
- HiiHandleBuffer
- );
-
- //
- // Get a bigger bugffer if this one is to small, and try again
- //
- if (Status == EFI_BUFFER_TOO_SMALL) {
-
- gBS->FreePool (HiiHandleBuffer);
-
- HiiHandleBuffer = AllocatePool (HiiHandleBufferLength);
- ASSERT (HiiHandleBuffer != NULL);
-
- Status = HiiProt->FindHandles (
- HiiProt,
- &HiiHandleBufferLength,
- HiiHandleBuffer
- );
- }
-
- if (EFI_ERROR (Status)) {
- goto lbl_exit;
- }
-
- NumberOfHiiHandles = HiiHandleBufferLength / sizeof (EFI_HII_HANDLE);
-
- //
- // Iterate Hii handles and look for the one that matches our Guid
- //
- for (Index = 0; Index < NumberOfHiiHandles; Index++) {
-
- Length = 0;
- ExtractDataFromHiiHandle (HiiHandleBuffer[Index], &Length, NULL, &HiiGuid);
-
- if (CompareGuid (&HiiGuid, Guid)) {
-
- HiiHandle = HiiHandleBuffer[Index];
- break;
- }
- }
-
-lbl_exit:
- gBS->FreePool (HiiHandleBuffer);
- return HiiHandle;
-}
-
-
-EFI_STATUS
-ValidateDataFromHiiHandle (
- IN EFI_HII_HANDLE HiiHandle,
- OUT BOOLEAN *Results
- )
-/*++
-
-Routine Description:
-
- Validate that the data associated with the HiiHandle in NVRAM is within
- the reasonable parameters for that FormSet. Values for strings and passwords
- are not verified due to their not having the equivalent of valid range settings.
-
-Arguments:
-
- HiiHandle - Handle of the HII database entry to query
-
- Results - If return Status is EFI_SUCCESS, Results provides valid data
- TRUE = NVRAM Data is within parameters
- FALSE = NVRAM Data is NOT within parameters
-
-Returns:
-
- EFI_OUT_OF_RESOURCES - No enough buffer to allocate
-
- EFI_SUCCESS - Data successfully validated
---*/
-{
- EFI_STATUS Status;
- EFI_HII_PROTOCOL *Hii;
- EFI_GUID Guid;
- UINT8 *RawData;
- UINT8 *OldData;
- UINTN RawDataLength;
- UINT8 *VariableData;
- UINTN Index;
- UINTN Temp;
- UINTN SizeOfNvStore;
- UINTN CachedStart;
- BOOLEAN GotMatch;
-
- RawDataLength = DEFAULT_FORM_BUFFER_SIZE;
- SizeOfNvStore = 0;
- CachedStart = 0;
- GotMatch = FALSE;
- *Results = TRUE;
-
- Status = GetHiiInterface (&Hii);
-
- if (EFI_ERROR (Status)) {
- return Status;
- }
-
- //
- // Allocate space for retrieval of IFR data
- //
- RawData = AllocateZeroPool (RawDataLength);
- if (RawData == NULL) {
- return EFI_OUT_OF_RESOURCES;
- }
-
- //
- // Get all the forms associated with this HiiHandle
- //
- Status = Hii->GetForms (Hii, HiiHandle, 0, &RawDataLength, RawData);
-
- if (EFI_ERROR (Status)) {
- gBS->FreePool (RawData);
-
- //
- // Allocate space for retrieval of IFR data
- //
- RawData = AllocateZeroPool (RawDataLength);
- if (RawData == NULL) {
- return EFI_OUT_OF_RESOURCES;
- }
-
- //
- // Get all the forms associated with this HiiHandle
- //
- Status = Hii->GetForms (Hii, HiiHandle, 0, &RawDataLength, RawData);
- }
-
- OldData = RawData;
-
- //
- // Point RawData to the beginning of the form data
- //
- RawData = (UINT8 *) ((UINTN) RawData + sizeof (EFI_HII_PACK_HEADER));
-
- for (Index = 0; RawData[Index] != EFI_IFR_END_FORM_SET_OP;) {
- if (RawData[Index] == EFI_IFR_FORM_SET_OP) {
- CopyMem (&Guid, &((EFI_IFR_FORM_SET *) &RawData[Index])->Guid, sizeof (EFI_GUID));
- break;
- }
-
- Index = RawData[Index + 1] + Index;
- }
-
- for (Index = 0; RawData[Index] != EFI_IFR_END_FORM_SET_OP;) {
- switch (RawData[Index]) {
- case EFI_IFR_FORM_SET_OP:
- break;
-
- case EFI_IFR_ONE_OF_OP:
- case EFI_IFR_CHECKBOX_OP:
- case EFI_IFR_NUMERIC_OP:
- case EFI_IFR_DATE_OP:
- case EFI_IFR_TIME_OP:
- case EFI_IFR_PASSWORD_OP:
- case EFI_IFR_STRING_OP:
- //
- // Remember, multiple op-codes may reference the same item, so let's keep a running
- // marker of what the highest QuestionId that wasn't zero length. This will accurately
- // maintain the Size of the NvStore
- //
- if (((EFI_IFR_ONE_OF *) &RawData[Index])->Width != 0) {
- Temp = ((EFI_IFR_ONE_OF *) &RawData[Index])->QuestionId + ((EFI_IFR_ONE_OF *) &RawData[Index])->Width;
- if (SizeOfNvStore < Temp) {
- SizeOfNvStore = ((EFI_IFR_ONE_OF *) &RawData[Index])->QuestionId + ((EFI_IFR_ONE_OF *) &RawData[Index])->Width;
- }
- }
- }
-
- Index = RawData[Index + 1] + Index;
- }
-
- //
- // Allocate memory for our File Form Tags
- //
- VariableData = AllocateZeroPool (SizeOfNvStore);
- if (VariableData == NULL) {
- return EFI_OUT_OF_RESOURCES;
- }
-
- Status = gRT->GetVariable (
- (CHAR16 *) L"Setup",
- &Guid,
- NULL,
- &SizeOfNvStore,
- (VOID *) VariableData
- );
-
- if (EFI_ERROR (Status)) {
-
- //
- // If there is a variable that exists already and it is larger than what we calculated the
- // storage needs to be, we must assume the variable size from GetVariable is correct and not
- // allow the truncation of the variable. It is very possible that the user who created the IFR
- // we are cracking is not referring to a variable that was in a previous map, however we cannot
- // allow it's truncation.
- //
- if (Status == EFI_BUFFER_TOO_SMALL) {
- //
- // Free the buffer that was allocated that was too small
- //
- gBS->FreePool (VariableData);
-
- VariableData = AllocatePool (SizeOfNvStore);
- if (VariableData == NULL) {
- return EFI_OUT_OF_RESOURCES;
- }
-
- Status = gRT->GetVariable (
- (CHAR16 *) L"Setup",
- &Guid,
- NULL,
- &SizeOfNvStore,
- (VOID *) VariableData
- );
- }
- }
-
- //
- // Walk through the form and see that the variable data it refers to is ok.
- // This allows for the possibility of stale (obsoleted) data in the variable
- // can be overlooked without causing an error
- //
- for (Index = 0; RawData[Index] != EFI_IFR_END_FORM_SET_OP;) {
- switch (RawData[Index]) {
- case EFI_IFR_ONE_OF_OP:
- //
- // A one_of has no data, its the option that does - cache the storage Id
- //
- CachedStart = ((EFI_IFR_ONE_OF *) &RawData[Index])->QuestionId;
- break;
-
- case EFI_IFR_ONE_OF_OPTION_OP:
- //
- // A one_of_option can be any value
- //
- if (VariableData[CachedStart] == ((EFI_IFR_ONE_OF_OPTION *) &RawData[Index])->Value) {
- GotMatch = TRUE;
- }
- break;
-
- case EFI_IFR_END_ONE_OF_OP:
- //
- // At this point lets make sure that the data value in the NVRAM matches one of the options
- //
- if (!GotMatch) {
- *Results = FALSE;
- return EFI_SUCCESS;
- }
- break;
-
- case EFI_IFR_CHECKBOX_OP:
- //
- // A checkbox is a boolean, so 0 and 1 are valid
- // Remember, QuestionId corresponds to the offset location of the data in the variable
- //
- if (VariableData[((EFI_IFR_CHECKBOX *) &RawData[Index])->QuestionId] > 1) {
- *Results = FALSE;
- return EFI_SUCCESS;
- }
- break;
-
- case EFI_IFR_NUMERIC_OP:
- if ((VariableData[((EFI_IFR_NUMERIC *)&RawData[Index])->QuestionId] < ((EFI_IFR_NUMERIC *)&RawData[Index])->Minimum) ||
- (VariableData[((EFI_IFR_NUMERIC *)&RawData[Index])->QuestionId] > ((EFI_IFR_NUMERIC *)&RawData[Index])->Maximum)) {
- *Results = FALSE;
- return EFI_SUCCESS;
- }
- break;
-
- }
-
- Index = RawData[Index + 1] + Index;
- }
-
- //
- // Free our temporary repository of form data
- //
- gBS->FreePool (OldData);
- gBS->FreePool (VariableData);
-
- return EFI_SUCCESS;
-}
-
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