mirror of https://github.com/acidanthera/audk.git
Rename Crc32GuidedSectionExtractLib to DxeCrc32GuidedSectionExtractLib.
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@4156 6f19259b-4bc3-4df7-8a09-765794883524
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/*++
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Copyright (c) 2007, Intel Corporation
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All rights reserved. This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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Module Name:
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DxeCrc32GuidedSectionExtractLib.c
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Abstract:
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Implements GUIDed section extraction protocol interface with
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a specific GUID: CRC32.
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Please refer to the Framewokr Firmware Volume Specification 0.9.
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--*/
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#include <PiDxe.h>
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#include <Protocol/Crc32GuidedSectionExtraction.h>
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#include <Protocol/SecurityPolicy.h>
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#include <Library/ExtractGuidedSectionLib.h>
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#include <Library/DebugLib.h>
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#include <Library/UefiBootServicesTableLib.h>
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typedef struct {
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EFI_GUID_DEFINED_SECTION GuidedSectionHeader;
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UINT32 CRC32Checksum;
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} CRC32_SECTION_HEADER;
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EFI_STATUS
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EFIAPI
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Crc32GuidedSectionGetInfo (
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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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Routine Description:
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The implementation of Crc32 guided section GetInfo().
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Arguments:
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InputSection Buffer containing the input GUIDed section to be processed.
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OutputBufferSize The size of OutputBuffer.
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ScratchBufferSize The size of ScratchBuffer.
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SectionAttribute The attribute of the input guided section.
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Returns:
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EFI_SUCCESS - The size of destination buffer and the size of scratch buffer are successull retrieved.
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EFI_INVALID_PARAMETER - The source data is corrupted
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--*/
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{
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//
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// Retrieve the size and attribute of the input section data.
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//
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*SectionAttribute = ((EFI_GUID_DEFINED_SECTION *) InputSection)->Attributes;
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*ScratchBufferSize = 0;
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*OutputBufferSize = *(UINT32 *) (((EFI_COMMON_SECTION_HEADER *) InputSection)->Size) & 0x00ffffff;
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*OutputBufferSize -= ((EFI_GUID_DEFINED_SECTION *) InputSection)->DataOffset;
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return EFI_SUCCESS;
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}
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EFI_STATUS
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EFIAPI
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Crc32GuidedSectionHandler (
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IN CONST VOID *InputSection,
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OUT VOID **OutputBuffer,
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IN VOID *ScratchBuffer, OPTIONAL
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OUT UINT32 *AuthenticationStatus
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)
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/*++
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Routine Description:
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The implementation of Crc32 Guided section extraction.
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Arguments:
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InputSection Buffer containing the input GUIDed section to be processed.
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OutputBuffer OutputBuffer to point to the start of the section's contents.
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if guided data is not prcessed. Otherwise,
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OutputBuffer to contain the output data, which is allocated by the caller.
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ScratchBuffer A pointer to a caller-allocated buffer for function internal use.
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AuthenticationStatus A pointer to a caller-allocated UINT32 that indicates the
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authentication status of the output buffer.
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Returns:
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EFI_SUCCESS - Decompression is successfull
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EFI_INVALID_PARAMETER - The source data is corrupted
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--*/
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{
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EFI_STATUS Status;
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CRC32_SECTION_HEADER *Crc32SectionHeader;
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UINT32 Crc32Checksum;
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UINT32 OutputBufferSize;
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VOID *DummyInterface;
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Crc32Checksum = 0;
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//
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// Points to the Crc32 section header
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//
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Crc32SectionHeader = (CRC32_SECTION_HEADER *) InputSection;
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*OutputBuffer = (UINT8 *) InputSection + Crc32SectionHeader->GuidedSectionHeader.DataOffset;
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OutputBufferSize = *(UINT32 *) (((EFI_COMMON_SECTION_HEADER *) InputSection)->Size) & 0x00ffffff;
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OutputBufferSize -= Crc32SectionHeader->GuidedSectionHeader.DataOffset;
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//
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// Implictly CRC32 GUIDed section should have STATUS_VALID bit set
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//
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ASSERT (Crc32SectionHeader->GuidedSectionHeader.Attributes & EFI_GUIDED_SECTION_AUTH_STATUS_VALID);
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*AuthenticationStatus = EFI_AUTH_STATUS_IMAGE_SIGNED;
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//
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// Check whether there exists EFI_SECURITY_POLICY_PROTOCOL_GUID.
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//
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Status = gBS->LocateProtocol (&gEfiSecurityPolicyProtocolGuid, NULL, &DummyInterface);
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if (!EFI_ERROR (Status)) {
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*AuthenticationStatus |= EFI_AUTH_STATUS_PLATFORM_OVERRIDE;
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} else {
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//
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// Calculate CRC32 Checksum of Image
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//
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Status = gBS->CalculateCrc32 (*OutputBuffer, OutputBufferSize, &Crc32Checksum);
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if (Status == EFI_SUCCESS) {
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if (Crc32Checksum != Crc32SectionHeader->CRC32Checksum) {
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*AuthenticationStatus |= EFI_AUTH_STATUS_TEST_FAILED;
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}
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} else {
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*AuthenticationStatus |= EFI_AUTH_STATUS_NOT_TESTED;
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}
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}
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return EFI_SUCCESS;
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}
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/**
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Register Crc32 section handler.
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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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DxeCrc32GuidedSectionExtractLibConstructor (
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)
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{
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return ExtractGuidedSectionRegisterHandlers (
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&gEfiCrc32GuidedSectionExtractionProtocolGuid,
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Crc32GuidedSectionGetInfo,
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Crc32GuidedSectionHandler
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);
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}
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@ -0,0 +1,48 @@
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#/** @file
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# Component description file for Crc32SectionExtract library.
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#
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# Copyright (c) 2006 - 2007, Intel Corporation
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#
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# All rights reserved. This program and the accompanying materials
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# are licensed and made available under the terms and conditions of the BSD License
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# which accompanies this distribution. The full text of the license may be found at
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# http://opensource.org/licenses/bsd-license.php
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# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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#
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#
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#**/
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[Defines]
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INF_VERSION = 0x00010005
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BASE_NAME = DxeCrc32GuidedSectionExtractLib
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FILE_GUID = 387A2490-81FC-4E7C-8E0A-3E58C30FCD0B
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MODULE_TYPE = DXE_DRIVER
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VERSION_STRING = 1.0
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EDK_RELEASE_VERSION = 0x00020000
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EFI_SPECIFICATION_VERSION = 0x00020000
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CONSTRUCTOR = DxeCrc32GuidedSectionExtractLibConstructor
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#
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# The following information is for reference only and not required by the build tools.
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#
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# VALID_ARCHITECTURES = IA32 X64 IPF EBC
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#
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[Sources.common]
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DxeCrc32GuidedSectionExtractLib.c
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[Packages]
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MdePkg/MdePkg.dec
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MdeModulePkg/MdeModulePkg.dec
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[LibraryClasses]
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ExtractGuidedSectionLib
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UefiBootServicesTableLib
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DebugLib
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[Protocols]
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gEfiCrc32GuidedSectionExtractionProtocolGuid
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gEfiSecurityPolicyProtocolGuid
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