diff options
Diffstat (limited to 'MdeModulePkg/Library/DxeCrc32GuidedSectionExtractLib/DxeCrc32GuidedSectionExtractLib.c')
| -rw-r--r-- | MdeModulePkg/Library/DxeCrc32GuidedSectionExtractLib/DxeCrc32GuidedSectionExtractLib.c | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/MdeModulePkg/Library/DxeCrc32GuidedSectionExtractLib/DxeCrc32GuidedSectionExtractLib.c b/MdeModulePkg/Library/DxeCrc32GuidedSectionExtractLib/DxeCrc32GuidedSectionExtractLib.c new file mode 100644 index 0000000000..6deb8dc6d2 --- /dev/null +++ b/MdeModulePkg/Library/DxeCrc32GuidedSectionExtractLib/DxeCrc32GuidedSectionExtractLib.c @@ -0,0 +1,166 @@ +/*++
+
+Copyright (c) 2007, 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:
+
+ DxeCrc32GuidedSectionExtractLib.c
+
+Abstract:
+
+ Implements GUIDed section extraction protocol interface with
+ a specific GUID: CRC32.
+
+ Please refer to the Framewokr Firmware Volume Specification 0.9.
+
+--*/
+
+#include <PiDxe.h>
+#include <Protocol/Crc32GuidedSectionExtraction.h>
+#include <Protocol/SecurityPolicy.h>
+#include <Library/ExtractGuidedSectionLib.h>
+#include <Library/DebugLib.h>
+#include <Library/UefiBootServicesTableLib.h>
+
+typedef struct {
+ EFI_GUID_DEFINED_SECTION GuidedSectionHeader;
+ UINT32 CRC32Checksum;
+} CRC32_SECTION_HEADER;
+
+EFI_STATUS
+EFIAPI
+Crc32GuidedSectionGetInfo (
+ IN CONST VOID *InputSection,
+ OUT UINT32 *OutputBufferSize,
+ OUT UINT32 *ScratchBufferSize,
+ OUT UINT16 *SectionAttribute
+ )
+/*++
+
+Routine Description:
+
+ The implementation of Crc32 guided section GetInfo().
+
+Arguments:
+ InputSection Buffer containing the input GUIDed section to be processed.
+ OutputBufferSize The size of OutputBuffer.
+ ScratchBufferSize The size of ScratchBuffer.
+ SectionAttribute The attribute of the input guided section.
+
+Returns:
+
+ EFI_SUCCESS - The size of destination buffer and the size of scratch buffer are successull retrieved.
+ EFI_INVALID_PARAMETER - The source data is corrupted
+
+--*/
+{
+ //
+ // Retrieve the size and attribute of the input section data.
+ //
+ *SectionAttribute = ((EFI_GUID_DEFINED_SECTION *) InputSection)->Attributes;
+ *ScratchBufferSize = 0;
+ *OutputBufferSize = *(UINT32 *) (((EFI_COMMON_SECTION_HEADER *) InputSection)->Size) & 0x00ffffff;
+ *OutputBufferSize -= ((EFI_GUID_DEFINED_SECTION *) InputSection)->DataOffset;
+
+ return EFI_SUCCESS;
+}
+
+EFI_STATUS
+EFIAPI
+Crc32GuidedSectionHandler (
+ IN CONST VOID *InputSection,
+ OUT VOID **OutputBuffer,
+ IN VOID *ScratchBuffer, OPTIONAL
+ OUT UINT32 *AuthenticationStatus
+ )
+/*++
+
+Routine Description:
+
+ The implementation of Crc32 Guided section extraction.
+
+Arguments:
+ InputSection Buffer containing the input GUIDed section to be processed.
+ OutputBuffer OutputBuffer to point to the start of the section's contents.
+ if guided data is not prcessed. Otherwise,
+ OutputBuffer to contain the output data, which is allocated by the caller.
+ ScratchBuffer A pointer to a caller-allocated buffer for function internal use.
+ AuthenticationStatus A pointer to a caller-allocated UINT32 that indicates the
+ authentication status of the output buffer. +
+Returns:
+
+ EFI_SUCCESS - Decompression is successfull
+ EFI_INVALID_PARAMETER - The source data is corrupted
+
+--*/
+{
+ EFI_STATUS Status;
+ CRC32_SECTION_HEADER *Crc32SectionHeader;
+ UINT32 Crc32Checksum;
+ UINT32 OutputBufferSize;
+ VOID *DummyInterface;
+
+ Crc32Checksum = 0;
+ //
+ // Points to the Crc32 section header
+ //
+ Crc32SectionHeader = (CRC32_SECTION_HEADER *) InputSection;
+ *OutputBuffer = (UINT8 *) InputSection + Crc32SectionHeader->GuidedSectionHeader.DataOffset;
+ OutputBufferSize = *(UINT32 *) (((EFI_COMMON_SECTION_HEADER *) InputSection)->Size) & 0x00ffffff;
+ OutputBufferSize -= Crc32SectionHeader->GuidedSectionHeader.DataOffset;
+
+ //
+ // Implictly CRC32 GUIDed section should have STATUS_VALID bit set
+ //
+ ASSERT (Crc32SectionHeader->GuidedSectionHeader.Attributes & EFI_GUIDED_SECTION_AUTH_STATUS_VALID);
+ *AuthenticationStatus = EFI_AUTH_STATUS_IMAGE_SIGNED;
+
+ //
+ // Check whether there exists EFI_SECURITY_POLICY_PROTOCOL_GUID.
+ //
+ Status = gBS->LocateProtocol (&gEfiSecurityPolicyProtocolGuid, NULL, &DummyInterface);
+ if (!EFI_ERROR (Status)) {
+ *AuthenticationStatus |= EFI_AUTH_STATUS_PLATFORM_OVERRIDE;
+ } else {
+ //
+ // Calculate CRC32 Checksum of Image
+ //
+ Status = gBS->CalculateCrc32 (*OutputBuffer, OutputBufferSize, &Crc32Checksum);
+ if (Status == EFI_SUCCESS) {
+ if (Crc32Checksum != Crc32SectionHeader->CRC32Checksum) {
+ *AuthenticationStatus |= EFI_AUTH_STATUS_TEST_FAILED;
+ }
+ } else {
+ *AuthenticationStatus |= EFI_AUTH_STATUS_NOT_TESTED;
+ }
+ }
+
+ return EFI_SUCCESS;
+}
+
+/** + Register Crc32 section handler.
+ + @retval RETURN_SUCCESS Register successfully.
+ @retval RETURN_OUT_OF_RESOURCES No enough memory to store this handler. +**/
+EFI_STATUS
+EFIAPI
+DxeCrc32GuidedSectionExtractLibConstructor (
+ )
+{
+ return ExtractGuidedSectionRegisterHandlers (
+ &gEfiCrc32GuidedSectionExtractionProtocolGuid,
+ Crc32GuidedSectionGetInfo,
+ Crc32GuidedSectionHandler
+ );
+}
+
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