mirror of https://github.com/acidanthera/audk.git
415 lines
14 KiB
C
415 lines
14 KiB
C
/** @file
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This library registers RSA 2048 SHA 256 guided section handler
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to parse RSA 2048 SHA 256 encapsulation section and extract raw data.
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It uses the BaseCryptLib based on OpenSSL to authenticate the signature.
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Copyright (c) 2013 - 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 <PiDxe.h>
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#include <Protocol/Hash.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/BaseMemoryLib.h>
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#include <Library/MemoryAllocationLib.h>
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#include <Library/UefiBootServicesTableLib.h>
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#include <Library/PcdLib.h>
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#include <Guid/WinCertificate.h>
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#include <Library/BaseCryptLib.h>
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#include <Library/PerformanceLib.h>
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#include <Guid/SecurityPkgTokenSpace.h>
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///
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/// RSA 2048 SHA 256 Guided Section header
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///
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typedef struct {
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EFI_GUID_DEFINED_SECTION GuidedSectionHeader; ///< EFI guided section header
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EFI_CERT_BLOCK_RSA_2048_SHA256 CertBlockRsa2048Sha256; ///< RSA 2048-bit Signature
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} RSA_2048_SHA_256_SECTION_HEADER;
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typedef struct {
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EFI_GUID_DEFINED_SECTION2 GuidedSectionHeader; ///< EFI guided section header
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EFI_CERT_BLOCK_RSA_2048_SHA256 CertBlockRsa2048Sha256; ///< RSA 2048-bit Signature
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} RSA_2048_SHA_256_SECTION2_HEADER;
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///
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/// Public Exponent of RSA Key.
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///
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CONST UINT8 mRsaE[] = { 0x01, 0x00, 0x01 };
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/**
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GetInfo gets raw data size and attribute of the input guided section.
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It first checks whether the input guid section is supported.
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If not, EFI_INVALID_PARAMETER will return.
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@param InputSection Buffer containing the input GUIDed section to be processed.
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@param OutputBufferSize The size of OutputBuffer.
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@param ScratchBufferSize The size of ScratchBuffer.
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@param SectionAttribute The attribute of the input guided section.
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@retval EFI_SUCCESS The size of destination buffer, the size of scratch buffer and
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the attribute of the input section are successfully retrieved.
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@retval EFI_INVALID_PARAMETER The GUID in InputSection does not match this instance guid.
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**/
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EFI_STATUS
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EFIAPI
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Rsa2048Sha256GuidedSectionGetInfo (
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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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if (IS_SECTION2 (InputSection)) {
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//
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// Check whether the input guid section is recognized.
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//
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if (!CompareGuid (
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&gEfiCertTypeRsa2048Sha256Guid,
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&(((EFI_GUID_DEFINED_SECTION2 *)InputSection)->SectionDefinitionGuid)
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))
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{
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return EFI_INVALID_PARAMETER;
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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_SECTION2 *)InputSection)->Attributes;
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*ScratchBufferSize = 0;
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*OutputBufferSize = SECTION2_SIZE (InputSection) - sizeof (RSA_2048_SHA_256_SECTION2_HEADER);
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} else {
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//
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// Check whether the input guid section is recognized.
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//
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if (!CompareGuid (
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&gEfiCertTypeRsa2048Sha256Guid,
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&(((EFI_GUID_DEFINED_SECTION *)InputSection)->SectionDefinitionGuid)
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))
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{
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return EFI_INVALID_PARAMETER;
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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 = SECTION_SIZE (InputSection) - sizeof (RSA_2048_SHA_256_SECTION_HEADER);
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}
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return EFI_SUCCESS;
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}
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/**
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Extraction handler tries to extract raw data from the input guided section.
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It also does authentication check for RSA 2048 SHA 256 signature in the input guided section.
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It first checks whether the input guid section is supported.
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If not, EFI_INVALID_PARAMETER will return.
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@param InputSection Buffer containing the input GUIDed section to be processed.
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@param OutputBuffer Buffer to contain the output raw data allocated by the caller.
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@param ScratchBuffer A pointer to a caller-allocated buffer for function internal use.
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@param 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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@retval EFI_SUCCESS Section Data and Auth Status is extracted successfully.
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@retval EFI_INVALID_PARAMETER The GUID in InputSection does not match this instance guid.
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**/
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EFI_STATUS
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EFIAPI
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Rsa2048Sha256GuidedSectionHandler (
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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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EFI_STATUS Status;
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UINT32 OutputBufferSize;
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VOID *DummyInterface;
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EFI_CERT_BLOCK_RSA_2048_SHA256 *CertBlockRsa2048Sha256;
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BOOLEAN CryptoStatus;
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UINT8 Digest[SHA256_DIGEST_SIZE];
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UINT8 *PublicKey;
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UINTN PublicKeyBufferSize;
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VOID *HashContext;
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VOID *Rsa;
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HashContext = NULL;
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Rsa = NULL;
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if (IS_SECTION2 (InputSection)) {
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//
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// Check whether the input guid section is recognized.
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//
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if (!CompareGuid (
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&gEfiCertTypeRsa2048Sha256Guid,
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&(((EFI_GUID_DEFINED_SECTION2 *)InputSection)->SectionDefinitionGuid)
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))
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{
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return EFI_INVALID_PARAMETER;
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}
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//
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// Get the RSA 2048 SHA 256 information.
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//
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CertBlockRsa2048Sha256 = &((RSA_2048_SHA_256_SECTION2_HEADER *)InputSection)->CertBlockRsa2048Sha256;
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OutputBufferSize = SECTION2_SIZE (InputSection) - sizeof (RSA_2048_SHA_256_SECTION2_HEADER);
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if ((((EFI_GUID_DEFINED_SECTION *)InputSection)->Attributes & EFI_GUIDED_SECTION_PROCESSING_REQUIRED) != 0) {
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PERF_INMODULE_BEGIN ("DxeRsaCopy");
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CopyMem (*OutputBuffer, (UINT8 *)InputSection + sizeof (RSA_2048_SHA_256_SECTION2_HEADER), OutputBufferSize);
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PERF_INMODULE_END ("DxeRsaCopy");
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} else {
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*OutputBuffer = (UINT8 *)InputSection + sizeof (RSA_2048_SHA_256_SECTION2_HEADER);
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}
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//
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// Implicitly RSA 2048 SHA 256 GUIDed section should have STATUS_VALID bit set
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//
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ASSERT ((((EFI_GUID_DEFINED_SECTION2 *)InputSection)->Attributes & EFI_GUIDED_SECTION_AUTH_STATUS_VALID) != 0);
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*AuthenticationStatus = EFI_AUTH_STATUS_IMAGE_SIGNED;
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} else {
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//
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// Check whether the input guid section is recognized.
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//
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if (!CompareGuid (
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&gEfiCertTypeRsa2048Sha256Guid,
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&(((EFI_GUID_DEFINED_SECTION *)InputSection)->SectionDefinitionGuid)
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))
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{
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return EFI_INVALID_PARAMETER;
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}
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//
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// Get the RSA 2048 SHA 256 information.
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//
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CertBlockRsa2048Sha256 = &((RSA_2048_SHA_256_SECTION_HEADER *)InputSection)->CertBlockRsa2048Sha256;
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OutputBufferSize = SECTION_SIZE (InputSection) - sizeof (RSA_2048_SHA_256_SECTION_HEADER);
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if ((((EFI_GUID_DEFINED_SECTION *)InputSection)->Attributes & EFI_GUIDED_SECTION_PROCESSING_REQUIRED) != 0) {
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PERF_INMODULE_BEGIN ("DxeRsaCopy");
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CopyMem (*OutputBuffer, (UINT8 *)InputSection + sizeof (RSA_2048_SHA_256_SECTION_HEADER), OutputBufferSize);
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PERF_INMODULE_END ("DxeRsaCopy");
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} else {
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*OutputBuffer = (UINT8 *)InputSection + sizeof (RSA_2048_SHA_256_SECTION_HEADER);
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}
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//
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// Implicitly RSA 2048 SHA 256 GUIDed section should have STATUS_VALID bit set
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//
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ASSERT ((((EFI_GUID_DEFINED_SECTION *)InputSection)->Attributes & EFI_GUIDED_SECTION_AUTH_STATUS_VALID) != 0);
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*AuthenticationStatus = EFI_AUTH_STATUS_IMAGE_SIGNED;
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}
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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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//
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// If SecurityPolicy Protocol exist, AUTH platform override bit is set.
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//
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*AuthenticationStatus |= EFI_AUTH_STATUS_PLATFORM_OVERRIDE;
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return EFI_SUCCESS;
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}
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//
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// All paths from here return EFI_SUCCESS and result is returned in AuthenticationStatus
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//
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Status = EFI_SUCCESS;
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//
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// Fail if the HashType is not SHA 256
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//
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if (!CompareGuid (&gEfiHashAlgorithmSha256Guid, &CertBlockRsa2048Sha256->HashType)) {
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DEBUG ((DEBUG_ERROR, "DxeRsa2048Sha256: HASH type of section is not supported\n"));
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*AuthenticationStatus |= EFI_AUTH_STATUS_TEST_FAILED;
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goto Done;
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}
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//
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// Allocate hash context buffer required for SHA 256
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//
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HashContext = AllocatePool (Sha256GetContextSize ());
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if (HashContext == NULL) {
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DEBUG ((DEBUG_ERROR, "DxeRsa2048Sha256: Can not allocate hash context\n"));
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*AuthenticationStatus |= EFI_AUTH_STATUS_TEST_FAILED;
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goto Done;
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}
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//
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// Hash public key from data payload with SHA256.
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//
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ZeroMem (Digest, SHA256_DIGEST_SIZE);
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CryptoStatus = Sha256Init (HashContext);
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if (!CryptoStatus) {
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DEBUG ((DEBUG_ERROR, "DxeRsa2048Sha256: Sha256Init() failed\n"));
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*AuthenticationStatus |= EFI_AUTH_STATUS_TEST_FAILED;
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goto Done;
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}
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CryptoStatus = Sha256Update (HashContext, &CertBlockRsa2048Sha256->PublicKey, sizeof (CertBlockRsa2048Sha256->PublicKey));
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if (!CryptoStatus) {
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DEBUG ((DEBUG_ERROR, "DxeRsa2048Sha256: Sha256Update() failed\n"));
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*AuthenticationStatus |= EFI_AUTH_STATUS_TEST_FAILED;
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goto Done;
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}
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CryptoStatus = Sha256Final (HashContext, Digest);
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if (!CryptoStatus) {
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DEBUG ((DEBUG_ERROR, "DxeRsa2048Sha256: Sha256Final() failed\n"));
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*AuthenticationStatus |= EFI_AUTH_STATUS_TEST_FAILED;
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goto Done;
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}
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//
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// Fail if the PublicKey is not one of the public keys in PcdRsa2048Sha256PublicKeyBuffer
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//
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PublicKey = (UINT8 *)PcdGetPtr (PcdRsa2048Sha256PublicKeyBuffer);
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DEBUG ((DEBUG_VERBOSE, "DxePcdRsa2048Sha256: PublicKeyBuffer = %p\n", PublicKey));
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ASSERT (PublicKey != NULL);
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DEBUG ((DEBUG_VERBOSE, "DxePcdRsa2048Sha256: PublicKeyBuffer Token = %08x\n", PcdToken (PcdRsa2048Sha256PublicKeyBuffer)));
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PublicKeyBufferSize = PcdGetSize (PcdRsa2048Sha256PublicKeyBuffer);
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DEBUG ((DEBUG_VERBOSE, "DxePcdRsa2048Sha256: PublicKeyBuffer Size = %08x\n", PublicKeyBufferSize));
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ASSERT ((PublicKeyBufferSize % SHA256_DIGEST_SIZE) == 0);
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CryptoStatus = FALSE;
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while (PublicKeyBufferSize != 0) {
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if (CompareMem (Digest, PublicKey, SHA256_DIGEST_SIZE) == 0) {
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CryptoStatus = TRUE;
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break;
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}
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PublicKey = PublicKey + SHA256_DIGEST_SIZE;
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PublicKeyBufferSize = PublicKeyBufferSize - SHA256_DIGEST_SIZE;
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}
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if (!CryptoStatus) {
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DEBUG ((DEBUG_ERROR, "DxeRsa2048Sha256: Public key in section is not supported\n"));
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*AuthenticationStatus |= EFI_AUTH_STATUS_TEST_FAILED;
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goto Done;
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}
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//
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// Generate & Initialize RSA Context.
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//
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Rsa = RsaNew ();
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if (Rsa == NULL) {
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DEBUG ((DEBUG_ERROR, "DxeRsa2048Sha256: RsaNew() failed\n"));
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*AuthenticationStatus |= EFI_AUTH_STATUS_TEST_FAILED;
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goto Done;
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}
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//
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// Set RSA Key Components.
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// NOTE: Only N and E are needed to be set as RSA public key for signature verification.
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//
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CryptoStatus = RsaSetKey (Rsa, RsaKeyN, CertBlockRsa2048Sha256->PublicKey, sizeof (CertBlockRsa2048Sha256->PublicKey));
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if (!CryptoStatus) {
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DEBUG ((DEBUG_ERROR, "DxeRsa2048Sha256: RsaSetKey(RsaKeyN) failed\n"));
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*AuthenticationStatus |= EFI_AUTH_STATUS_TEST_FAILED;
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goto Done;
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}
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CryptoStatus = RsaSetKey (Rsa, RsaKeyE, mRsaE, sizeof (mRsaE));
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if (!CryptoStatus) {
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DEBUG ((DEBUG_ERROR, "DxeRsa2048Sha256: RsaSetKey(RsaKeyE) failed\n"));
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*AuthenticationStatus |= EFI_AUTH_STATUS_TEST_FAILED;
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goto Done;
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}
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//
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// Hash data payload with SHA256.
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//
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ZeroMem (Digest, SHA256_DIGEST_SIZE);
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CryptoStatus = Sha256Init (HashContext);
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if (!CryptoStatus) {
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DEBUG ((DEBUG_ERROR, "DxeRsa2048Sha256: Sha256Init() failed\n"));
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*AuthenticationStatus |= EFI_AUTH_STATUS_TEST_FAILED;
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goto Done;
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}
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PERF_INMODULE_BEGIN ("DxeRsaShaData");
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CryptoStatus = Sha256Update (HashContext, *OutputBuffer, OutputBufferSize);
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PERF_INMODULE_END ("DxeRsaShaData");
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if (!CryptoStatus) {
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DEBUG ((DEBUG_ERROR, "DxeRsa2048Sha256: Sha256Update() failed\n"));
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*AuthenticationStatus |= EFI_AUTH_STATUS_TEST_FAILED;
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goto Done;
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}
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CryptoStatus = Sha256Final (HashContext, Digest);
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if (!CryptoStatus) {
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DEBUG ((DEBUG_ERROR, "DxeRsa2048Sha256: Sha256Final() failed\n"));
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*AuthenticationStatus |= EFI_AUTH_STATUS_TEST_FAILED;
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goto Done;
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}
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//
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// Verify the RSA 2048 SHA 256 signature.
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//
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PERF_INMODULE_BEGIN ("DxeRsaVerify");
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CryptoStatus = RsaPkcs1Verify (
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Rsa,
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Digest,
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SHA256_DIGEST_SIZE,
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CertBlockRsa2048Sha256->Signature,
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sizeof (CertBlockRsa2048Sha256->Signature)
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);
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PERF_INMODULE_END ("DxeRsaVerify");
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if (!CryptoStatus) {
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//
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// If RSA 2048 SHA 256 signature verification fails, AUTH tested failed bit is set.
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//
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DEBUG ((DEBUG_ERROR, "DxeRsa2048Sha256: RsaPkcs1Verify() failed\n"));
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*AuthenticationStatus |= EFI_AUTH_STATUS_TEST_FAILED;
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}
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Done:
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//
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// Free allocated resources used to perform RSA 2048 SHA 256 signature verification
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//
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if (Rsa != NULL) {
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RsaFree (Rsa);
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}
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if (HashContext != NULL) {
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FreePool (HashContext);
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}
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DEBUG ((DEBUG_VERBOSE, "DxeRsa2048Sha256: Status = %r AuthenticationStatus = %08x\n", Status, *AuthenticationStatus));
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return Status;
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}
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/**
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Register the handler to extract RSA 2048 SHA 256 guided section.
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@param ImageHandle ImageHandle of the loaded driver.
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@param SystemTable Pointer to the EFI System Table.
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@retval EFI_SUCCESS Register successfully.
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@retval EFI_OUT_OF_RESOURCES Not enough memory to register this handler.
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**/
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EFI_STATUS
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EFIAPI
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DxeRsa2048Sha256GuidedSectionExtractLibConstructor (
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IN EFI_HANDLE ImageHandle,
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IN EFI_SYSTEM_TABLE *SystemTable
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)
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{
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return ExtractGuidedSectionRegisterHandlers (
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&gEfiCertTypeRsa2048Sha256Guid,
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Rsa2048Sha256GuidedSectionGetInfo,
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Rsa2048Sha256GuidedSectionHandler
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);
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}
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