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197 lines
8.0 KiB
C
197 lines
8.0 KiB
C
/** @file
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LZMA Decompress GUIDed Section Extraction Library.
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It wraps Lzma decompress interfaces to GUIDed Section Extraction interfaces
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and registers them into GUIDed handler table.
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Copyright (c) 2009 - 2018, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include "LzmaDecompressLibInternal.h"
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/**
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Examines a GUIDed section and returns the size of the decoded buffer and the
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size of an scratch buffer required to actually decode the data in a GUIDed section.
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Examines a GUIDed section specified by InputSection.
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If GUID for InputSection does not match the GUID that this handler supports,
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then RETURN_UNSUPPORTED is returned.
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If the required information can not be retrieved from InputSection,
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then RETURN_INVALID_PARAMETER is returned.
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If the GUID of InputSection does match the GUID that this handler supports,
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then the size required to hold the decoded buffer is returned in OututBufferSize,
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the size of an optional scratch buffer is returned in ScratchSize, and the Attributes field
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from EFI_GUID_DEFINED_SECTION header of InputSection is returned in SectionAttribute.
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If InputSection is NULL, then ASSERT().
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If OutputBufferSize is NULL, then ASSERT().
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If ScratchBufferSize is NULL, then ASSERT().
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If SectionAttribute is NULL, then ASSERT().
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@param[in] InputSection A pointer to a GUIDed section of an FFS formatted file.
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@param[out] OutputBufferSize A pointer to the size, in bytes, of an output buffer required
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if the buffer specified by InputSection were decoded.
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@param[out] ScratchBufferSize A pointer to the size, in bytes, required as scratch space
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if the buffer specified by InputSection were decoded.
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@param[out] SectionAttribute A pointer to the attributes of the GUIDed section. See the Attributes
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field of EFI_GUID_DEFINED_SECTION in the PI Specification.
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@retval RETURN_SUCCESS The information about InputSection was returned.
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@retval RETURN_UNSUPPORTED The section specified by InputSection does not match the GUID this handler supports.
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@retval RETURN_INVALID_PARAMETER The information can not be retrieved from the section specified by InputSection.
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**/
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RETURN_STATUS
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EFIAPI
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LzmaGuidedSectionGetInfo (
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IN CONST VOID *InputSection,
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OUT UINT32 *OutputBufferSize,
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OUT UINT32 *ScratchBufferSize,
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OUT UINT16 *SectionAttribute
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)
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{
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ASSERT (InputSection != NULL);
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ASSERT (OutputBufferSize != NULL);
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ASSERT (ScratchBufferSize != NULL);
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ASSERT (SectionAttribute != NULL);
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if (IS_SECTION2 (InputSection)) {
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if (!CompareGuid (
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&gLzmaCustomDecompressGuid,
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&(((EFI_GUID_DEFINED_SECTION2 *) InputSection)->SectionDefinitionGuid))) {
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return RETURN_INVALID_PARAMETER;
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}
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*SectionAttribute = ((EFI_GUID_DEFINED_SECTION2 *) InputSection)->Attributes;
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return LzmaUefiDecompressGetInfo (
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(UINT8 *) InputSection + ((EFI_GUID_DEFINED_SECTION2 *) InputSection)->DataOffset,
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SECTION2_SIZE (InputSection) - ((EFI_GUID_DEFINED_SECTION2 *) InputSection)->DataOffset,
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OutputBufferSize,
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ScratchBufferSize
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);
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} else {
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if (!CompareGuid (
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&gLzmaCustomDecompressGuid,
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&(((EFI_GUID_DEFINED_SECTION *) InputSection)->SectionDefinitionGuid))) {
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return RETURN_INVALID_PARAMETER;
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}
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*SectionAttribute = ((EFI_GUID_DEFINED_SECTION *) InputSection)->Attributes;
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return LzmaUefiDecompressGetInfo (
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(UINT8 *) InputSection + ((EFI_GUID_DEFINED_SECTION *) InputSection)->DataOffset,
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SECTION_SIZE (InputSection) - ((EFI_GUID_DEFINED_SECTION *) InputSection)->DataOffset,
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OutputBufferSize,
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ScratchBufferSize
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);
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}
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}
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/**
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Decompress a LZAM compressed GUIDed section into a caller allocated output buffer.
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Decodes the GUIDed section specified by InputSection.
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If GUID for InputSection does not match the GUID that this handler supports, then RETURN_UNSUPPORTED is returned.
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If the data in InputSection can not be decoded, then RETURN_INVALID_PARAMETER is returned.
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If the GUID of InputSection does match the GUID that this handler supports, then InputSection
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is decoded into the buffer specified by OutputBuffer and the authentication status of this
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decode operation is returned in AuthenticationStatus. If the decoded buffer is identical to the
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data in InputSection, then OutputBuffer is set to point at the data in InputSection. Otherwise,
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the decoded data will be placed in caller allocated buffer specified by OutputBuffer.
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If InputSection is NULL, then ASSERT().
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If OutputBuffer is NULL, then ASSERT().
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If ScratchBuffer is NULL and this decode operation requires a scratch buffer, then ASSERT().
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If AuthenticationStatus is NULL, then ASSERT().
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@param[in] InputSection A pointer to a GUIDed section of an FFS formatted file.
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@param[out] OutputBuffer A pointer to a buffer that contains the result of a decode operation.
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@param[out] ScratchBuffer A caller allocated buffer that may be required by this function
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as a scratch buffer to perform the decode operation.
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@param[out] AuthenticationStatus
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A pointer to the authentication status of the decoded output buffer.
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See the definition of authentication status in the EFI_PEI_GUIDED_SECTION_EXTRACTION_PPI
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section of the PI Specification. EFI_AUTH_STATUS_PLATFORM_OVERRIDE must
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never be set by this handler.
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@retval RETURN_SUCCESS The buffer specified by InputSection was decoded.
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@retval RETURN_UNSUPPORTED The section specified by InputSection does not match the GUID this handler supports.
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@retval RETURN_INVALID_PARAMETER The section specified by InputSection can not be decoded.
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**/
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RETURN_STATUS
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EFIAPI
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LzmaGuidedSectionExtraction (
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IN CONST VOID *InputSection,
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OUT VOID **OutputBuffer,
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OUT VOID *ScratchBuffer, OPTIONAL
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OUT UINT32 *AuthenticationStatus
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)
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{
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ASSERT (OutputBuffer != NULL);
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ASSERT (InputSection != NULL);
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if (IS_SECTION2 (InputSection)) {
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if (!CompareGuid (
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&gLzmaCustomDecompressGuid,
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&(((EFI_GUID_DEFINED_SECTION2 *) InputSection)->SectionDefinitionGuid))) {
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return RETURN_INVALID_PARAMETER;
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}
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//
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// Authentication is set to Zero, which may be ignored.
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//
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*AuthenticationStatus = 0;
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return LzmaUefiDecompress (
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(UINT8 *) InputSection + ((EFI_GUID_DEFINED_SECTION2 *) InputSection)->DataOffset,
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SECTION2_SIZE (InputSection) - ((EFI_GUID_DEFINED_SECTION2 *) InputSection)->DataOffset,
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*OutputBuffer,
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ScratchBuffer
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);
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} else {
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if (!CompareGuid (
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&gLzmaCustomDecompressGuid,
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&(((EFI_GUID_DEFINED_SECTION *) InputSection)->SectionDefinitionGuid))) {
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return RETURN_INVALID_PARAMETER;
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}
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//
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// Authentication is set to Zero, which may be ignored.
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//
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*AuthenticationStatus = 0;
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return LzmaUefiDecompress (
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(UINT8 *) InputSection + ((EFI_GUID_DEFINED_SECTION *) InputSection)->DataOffset,
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SECTION_SIZE (InputSection) - ((EFI_GUID_DEFINED_SECTION *) InputSection)->DataOffset,
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*OutputBuffer,
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ScratchBuffer
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);
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}
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}
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/**
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Register LzmaDecompress and LzmaDecompressGetInfo handlers with LzmaCustomerDecompressGuid.
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@retval RETURN_SUCCESS Register successfully.
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@retval RETURN_OUT_OF_RESOURCES No enough memory to store this handler.
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**/
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EFI_STATUS
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EFIAPI
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LzmaDecompressLibConstructor (
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VOID
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)
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{
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return ExtractGuidedSectionRegisterHandlers (
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&gLzmaCustomDecompressGuid,
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LzmaGuidedSectionGetInfo,
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LzmaGuidedSectionExtraction
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);
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}
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