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|
/** @file
EDKII Device Security library for SPDM device.
It follows the SPDM Specification.
Copyright (c) 2024, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include "SpdmSecurityLibInternal.h"
/**
Measure and log an EFI variable, and extend the measurement result into a specific PCR.
@param[in] PcrIndex PCR Index.
@param[in] EventType Event type.
@param[in] VarName A Null-terminated string that is the name of the vendor's variable.
@param[in] VendorGuid A unique identifier for the vendor.
@param[in] VarData The content of the variable data.
@param[in] VarSize The size of the variable data.
@retval EFI_SUCCESS Operation completed successfully.
@retval EFI_OUT_OF_RESOURCES Out of memory.
@retval EFI_DEVICE_ERROR The operation was unsuccessful.
**/
EFI_STATUS
EFIAPI
MeasureVariable (
IN UINT32 PcrIndex,
IN UINT32 EventType,
IN CHAR16 *VarName,
IN EFI_GUID *VendorGuid,
IN VOID *VarData,
IN UINTN VarSize
)
{
EFI_STATUS Status;
UINTN VarNameLength;
UEFI_VARIABLE_DATA *VarLog;
UINT32 VarLogSize;
if (!(((VarSize == 0) && (VarData == NULL)) || ((VarSize != 0) && (VarData != NULL)))) {
ASSERT_EFI_ERROR (EFI_INVALID_PARAMETER);
return EFI_INVALID_PARAMETER;
}
VarNameLength = StrLen (VarName);
VarLogSize = (UINT32)(sizeof (*VarLog) + VarNameLength * sizeof (*VarName) + VarSize
- sizeof (VarLog->UnicodeName) - sizeof (VarLog->VariableData));
VarLog = (UEFI_VARIABLE_DATA *)AllocateZeroPool (VarLogSize);
if (VarLog == NULL) {
return EFI_OUT_OF_RESOURCES;
}
CopyMem (&VarLog->VariableName, VendorGuid, sizeof (VarLog->VariableName));
VarLog->UnicodeNameLength = VarNameLength;
VarLog->VariableDataLength = VarSize;
CopyMem (
VarLog->UnicodeName,
VarName,
VarNameLength * sizeof (*VarName)
);
if (VarSize != 0) {
CopyMem (
(CHAR16 *)VarLog->UnicodeName + VarNameLength,
VarData,
VarSize
);
}
DEBUG ((DEBUG_INFO, "VariableDxe: MeasureVariable (Pcr - %x, EventType - %x, ", (UINTN)PcrIndex, (UINTN)EventType));
DEBUG ((DEBUG_INFO, "VariableName - %s, VendorGuid - %g)\n", VarName, VendorGuid));
Status = TpmMeasureAndLogData (
PcrIndex,
EventType,
VarLog,
VarLogSize,
VarLog,
VarLogSize
);
FreePool (VarLog);
return Status;
}
/**
Extend Certicate and auth state to NV Index and measure trust anchor to PCR.
@param[in] SpdmDeviceContext The SPDM context for the device.
@param[in] AuthState The auth state of this deice.
@param[in] CertChainSize The size of cert chain.
@param[in] CertChain A pointer to a destination buffer to store the certificate chain.
@param[in] TrustAnchor A buffer to hold the trust_anchor which is used to validate the peer
certificate, if not NULL.
@param[in] TrustAnchorSize A buffer to hold the trust_anchor_size, if not NULL..
@param[in] SlotId The number of slot for the certificate chain.
@param[out] SecurityState A pointer to the security state of the requester.
@retval EFI_SUCCESS Operation completed successfully.
@retval EFI_OUT_OF_RESOURCES Out of memory.
@retval EFI_DEVICE_ERROR The operation was unsuccessful.
**/
EFI_STATUS
ExtendCertificate (
IN SPDM_DEVICE_CONTEXT *SpdmDeviceContext,
IN UINT8 AuthState,
IN UINTN CertChainSize,
IN UINT8 *CertChain,
IN VOID *TrustAnchor,
IN UINTN TrustAnchorSize,
IN UINT8 SlotId,
OUT EDKII_DEVICE_SECURITY_STATE *SecurityState
)
{
VOID *EventLog;
UINT32 EventLogSize;
UINT8 *EventLogPtr;
TCG_NV_INDEX_INSTANCE_EVENT_LOG_STRUCT *NvIndexInstance;
TCG_DEVICE_SECURITY_EVENT_DATA_HEADER2 *EventData2;
TCG_DEVICE_SECURITY_EVENT_DATA_SUB_HEADER_SPDM_CERT_CHAIN *TcgSpdmCertChain;
VOID *DeviceContext;
UINTN DeviceContextSize;
EFI_STATUS Status;
UINTN DevicePathSize;
UINT32 BaseHashAlgo;
UINTN DataSize;
VOID *SpdmContext;
SPDM_DATA_PARAMETER Parameter;
EFI_SIGNATURE_DATA *SignatureData;
UINTN SignatureDataSize;
SpdmContext = SpdmDeviceContext->SpdmContext;
EventLog = NULL;
ZeroMem (&Parameter, sizeof (Parameter));
Parameter.location = LIBSPDM_DATA_LOCATION_CONNECTION;
DataSize = sizeof (BaseHashAlgo);
Status = SpdmGetData (SpdmContext, LIBSPDM_DATA_BASE_HASH_ALGO, &Parameter, &BaseHashAlgo, &DataSize);
ASSERT_EFI_ERROR (Status);
DeviceContextSize = GetDeviceMeasurementContextSize (SpdmDeviceContext);
DevicePathSize = GetDevicePathSize (SpdmDeviceContext->DevicePath);
switch (AuthState) {
case TCG_DEVICE_SECURITY_EVENT_DATA_DEVICE_AUTH_STATE_SUCCESS:
case TCG_DEVICE_SECURITY_EVENT_DATA_DEVICE_AUTH_STATE_NO_AUTH:
case TCG_DEVICE_SECURITY_EVENT_DATA_DEVICE_AUTH_STATE_NO_BINDING:
EventLogSize = (UINT32)(sizeof (TCG_NV_INDEX_INSTANCE_EVENT_LOG_STRUCT) +
sizeof (TCG_DEVICE_SECURITY_EVENT_DATA_HEADER2) +
sizeof (UINT64) + DevicePathSize +
sizeof (TCG_DEVICE_SECURITY_EVENT_DATA_SUB_HEADER_SPDM_CERT_CHAIN) +
CertChainSize +
DeviceContextSize);
EventLog = AllocatePool (EventLogSize);
if (EventLog == NULL) {
SecurityState->AuthenticationState = EDKII_DEVICE_SECURITY_STATE_ERROR_UEFI_OUT_OF_RESOURCE;
return EFI_OUT_OF_RESOURCES;
}
EventLogPtr = EventLog;
NvIndexInstance = (VOID *)EventLogPtr;
CopyMem (NvIndexInstance->Signature, TCG_NV_EXTEND_INDEX_FOR_INSTANCE_SIGNATURE, sizeof (TCG_NV_EXTEND_INDEX_FOR_INSTANCE_SIGNATURE));
NvIndexInstance->Version = TCG_NV_INDEX_INSTANCE_EVENT_LOG_STRUCT_VERSION;
ZeroMem (NvIndexInstance->Reserved, sizeof (NvIndexInstance->Reserved));
EventLogPtr += sizeof (TCG_NV_INDEX_INSTANCE_EVENT_LOG_STRUCT);
EventData2 = (VOID *)EventLogPtr;
CopyMem (EventData2->Signature, TCG_DEVICE_SECURITY_EVENT_DATA_SIGNATURE_2, sizeof (EventData2->Signature));
EventData2->Version = TCG_DEVICE_SECURITY_EVENT_DATA_VERSION_2;
EventData2->AuthState = AuthState;
EventData2->Reserved = 0;
EventData2->Length = (UINT32)EventLogSize;
EventData2->DeviceType = GetSpdmDeviceType (SpdmDeviceContext);
EventData2->SubHeaderType = TCG_DEVICE_SECURITY_EVENT_DATA_DEVICE_SUB_HEADER_TYPE_SPDM_CERT_CHAIN;
EventData2->SubHeaderLength = (UINT32)(sizeof (TCG_DEVICE_SECURITY_EVENT_DATA_SUB_HEADER_SPDM_CERT_CHAIN) + CertChainSize);
EventData2->SubHeaderUID = SpdmDeviceContext->DeviceUID;
EventLogPtr = (VOID *)(EventData2 + 1);
*(UINT64 *)EventLogPtr = (UINT64)DevicePathSize;
EventLogPtr += sizeof (UINT64);
CopyMem (EventLogPtr, SpdmDeviceContext->DevicePath, DevicePathSize);
EventLogPtr += DevicePathSize;
TcgSpdmCertChain = (VOID *)EventLogPtr;
TcgSpdmCertChain->SpdmVersion = SpdmDeviceContext->SpdmVersion;
TcgSpdmCertChain->SpdmSlotId = SlotId;
TcgSpdmCertChain->Reserved = 0;
TcgSpdmCertChain->SpdmHashAlgo = BaseHashAlgo;
EventLogPtr += sizeof (TCG_DEVICE_SECURITY_EVENT_DATA_SUB_HEADER_SPDM_CERT_CHAIN);
CopyMem (EventLogPtr, CertChain, CertChainSize);
EventLogPtr += CertChainSize;
if (DeviceContextSize != 0) {
DeviceContext = (VOID *)EventLogPtr;
Status = CreateDeviceMeasurementContext (SpdmDeviceContext, DeviceContext, DeviceContextSize);
if (Status != EFI_SUCCESS) {
SecurityState->AuthenticationState = EDKII_DEVICE_SECURITY_STATE_ERROR_DEVICE_ERROR;
Status = EFI_DEVICE_ERROR;
goto Exit;
}
}
Status = TpmMeasureAndLogData (
TCG_NV_EXTEND_INDEX_FOR_INSTANCE,
EV_NO_ACTION,
EventLog,
EventLogSize,
EventLog,
EventLogSize
);
if (EFI_ERROR (Status)) {
SecurityState->AuthenticationState = EDKII_DEVICE_SECURITY_STATE_ERROR_TCG_EXTEND_TPM_PCR;
}
DEBUG ((DEBUG_INFO, "TpmMeasureAndLogData (Instance) - %r\n", Status));
break;
case TCG_DEVICE_SECURITY_EVENT_DATA_DEVICE_AUTH_STATE_FAIL_INVALID:
EventLogSize = (UINT32)(sizeof (TCG_NV_INDEX_INSTANCE_EVENT_LOG_STRUCT) +
sizeof (TCG_DEVICE_SECURITY_EVENT_DATA_HEADER2) +
sizeof (UINT64) + DevicePathSize +
sizeof (TCG_DEVICE_SECURITY_EVENT_DATA_SUB_HEADER_SPDM_CERT_CHAIN) +
DeviceContextSize);
EventLog = AllocatePool (EventLogSize);
if (EventLog == NULL) {
SecurityState->AuthenticationState = EDKII_DEVICE_SECURITY_STATE_ERROR_UEFI_OUT_OF_RESOURCE;
return EFI_OUT_OF_RESOURCES;
}
EventLogPtr = EventLog;
NvIndexInstance = (VOID *)EventLogPtr;
CopyMem (NvIndexInstance->Signature, TCG_NV_EXTEND_INDEX_FOR_INSTANCE_SIGNATURE, sizeof (TCG_NV_EXTEND_INDEX_FOR_INSTANCE_SIGNATURE));
NvIndexInstance->Version = TCG_NV_INDEX_INSTANCE_EVENT_LOG_STRUCT_VERSION;
ZeroMem (NvIndexInstance->Reserved, sizeof (NvIndexInstance->Reserved));
EventLogPtr += sizeof (TCG_NV_INDEX_INSTANCE_EVENT_LOG_STRUCT);
EventData2 = (VOID *)EventLogPtr;
CopyMem (EventData2->Signature, TCG_DEVICE_SECURITY_EVENT_DATA_SIGNATURE_2, sizeof (EventData2->Signature));
EventData2->Version = TCG_DEVICE_SECURITY_EVENT_DATA_VERSION_2;
EventData2->AuthState = AuthState;
EventData2->Reserved = 0;
EventData2->Length = (UINT32)EventLogSize;
EventData2->DeviceType = GetSpdmDeviceType (SpdmDeviceContext);
EventData2->SubHeaderType = TCG_DEVICE_SECURITY_EVENT_DATA_DEVICE_SUB_HEADER_TYPE_SPDM_CERT_CHAIN;
EventData2->SubHeaderLength = sizeof (TCG_DEVICE_SECURITY_EVENT_DATA_SUB_HEADER_SPDM_CERT_CHAIN);
EventData2->SubHeaderUID = SpdmDeviceContext->DeviceUID;
EventLogPtr = (VOID *)(EventData2 + 1);
*(UINT64 *)EventLogPtr = (UINT64)DevicePathSize;
EventLogPtr += sizeof (UINT64);
CopyMem (EventLogPtr, SpdmDeviceContext->DevicePath, DevicePathSize);
EventLogPtr += DevicePathSize;
TcgSpdmCertChain = (VOID *)EventLogPtr;
TcgSpdmCertChain->SpdmVersion = SpdmDeviceContext->SpdmVersion;
TcgSpdmCertChain->SpdmSlotId = SlotId;
TcgSpdmCertChain->Reserved = 0;
TcgSpdmCertChain->SpdmHashAlgo = BaseHashAlgo;
EventLogPtr += sizeof (TCG_DEVICE_SECURITY_EVENT_DATA_SUB_HEADER_SPDM_CERT_CHAIN);
if (DeviceContextSize != 0) {
DeviceContext = (VOID *)EventLogPtr;
Status = CreateDeviceMeasurementContext (SpdmDeviceContext, DeviceContext, DeviceContextSize);
if (Status != EFI_SUCCESS) {
SecurityState->AuthenticationState = EDKII_DEVICE_SECURITY_STATE_ERROR_DEVICE_ERROR;
Status = EFI_DEVICE_ERROR;
goto Exit;
}
}
Status = TpmMeasureAndLogData (
TCG_NV_EXTEND_INDEX_FOR_INSTANCE,
EV_NO_ACTION,
EventLog,
EventLogSize,
EventLog,
EventLogSize
);
if (EFI_ERROR (Status)) {
SecurityState->AuthenticationState = EDKII_DEVICE_SECURITY_STATE_ERROR_TCG_EXTEND_TPM_PCR;
}
DEBUG ((DEBUG_INFO, "TpmMeasureAndLogData (Instance) - %r\n", Status));
goto Exit;
case TCG_DEVICE_SECURITY_EVENT_DATA_DEVICE_AUTH_STATE_FAIL_NO_SIG:
case TCG_DEVICE_SECURITY_EVENT_DATA_DEVICE_AUTH_STATE_NO_SPDM:
EventLogSize = (UINT32)(sizeof (TCG_NV_INDEX_INSTANCE_EVENT_LOG_STRUCT) +
sizeof (TCG_DEVICE_SECURITY_EVENT_DATA_HEADER2) +
sizeof (UINT64) + DevicePathSize +
DeviceContextSize);
EventLog = AllocatePool (EventLogSize);
if (EventLog == NULL) {
SecurityState->AuthenticationState = EDKII_DEVICE_SECURITY_STATE_ERROR_UEFI_OUT_OF_RESOURCE;
return EFI_OUT_OF_RESOURCES;
}
EventLogPtr = EventLog;
NvIndexInstance = (VOID *)EventLogPtr;
CopyMem (NvIndexInstance->Signature, TCG_NV_EXTEND_INDEX_FOR_INSTANCE_SIGNATURE, sizeof (TCG_NV_EXTEND_INDEX_FOR_INSTANCE_SIGNATURE));
NvIndexInstance->Version = TCG_NV_INDEX_INSTANCE_EVENT_LOG_STRUCT_VERSION;
ZeroMem (NvIndexInstance->Reserved, sizeof (NvIndexInstance->Reserved));
EventLogPtr += sizeof (TCG_NV_INDEX_INSTANCE_EVENT_LOG_STRUCT);
EventData2 = (VOID *)EventLogPtr;
CopyMem (EventData2->Signature, TCG_DEVICE_SECURITY_EVENT_DATA_SIGNATURE_2, sizeof (EventData2->Signature));
EventData2->Version = TCG_DEVICE_SECURITY_EVENT_DATA_VERSION_2;
EventData2->AuthState = AuthState;
EventData2->Reserved = 0;
EventData2->Length = (UINT32)EventLogSize;
EventData2->DeviceType = GetSpdmDeviceType (SpdmDeviceContext);
EventData2->SubHeaderType = TCG_DEVICE_SECURITY_EVENT_DATA_DEVICE_SUB_HEADER_TYPE_SPDM_CERT_CHAIN;
EventData2->SubHeaderLength = 0;
EventData2->SubHeaderUID = SpdmDeviceContext->DeviceUID;
EventLogPtr = (VOID *)(EventData2 + 1);
*(UINT64 *)EventLogPtr = (UINT64)DevicePathSize;
EventLogPtr += sizeof (UINT64);
CopyMem (EventLogPtr, SpdmDeviceContext->DevicePath, DevicePathSize);
EventLogPtr += DevicePathSize;
if (DeviceContextSize != 0) {
DeviceContext = (VOID *)EventLogPtr;
Status = CreateDeviceMeasurementContext (SpdmDeviceContext, DeviceContext, DeviceContextSize);
if (Status != EFI_SUCCESS) {
SecurityState->AuthenticationState = EDKII_DEVICE_SECURITY_STATE_ERROR_DEVICE_ERROR;
Status = EFI_DEVICE_ERROR;
goto Exit;
}
}
Status = TpmMeasureAndLogData (
TCG_NV_EXTEND_INDEX_FOR_INSTANCE,
EV_NO_ACTION,
EventLog,
EventLogSize,
EventLog,
EventLogSize
);
if (EFI_ERROR (Status)) {
SecurityState->AuthenticationState = EDKII_DEVICE_SECURITY_STATE_ERROR_TCG_EXTEND_TPM_PCR;
}
DEBUG ((DEBUG_INFO, "TpmMeasureAndLogData (Instance) - %r\n", Status));
goto Exit;
default:
SecurityState->AuthenticationState = EDKII_DEVICE_SECURITY_STATE_ERROR_UEFI_UNSUPPORTED;
return EFI_UNSUPPORTED;
}
if ((TrustAnchor != NULL) && (TrustAnchorSize != 0)) {
SignatureDataSize = sizeof (EFI_GUID) + TrustAnchorSize;
SignatureData = AllocateZeroPool (SignatureDataSize);
if (SignatureData == NULL) {
ASSERT (SignatureData != NULL);
SecurityState->AuthenticationState = EDKII_DEVICE_SECURITY_STATE_ERROR_UEFI_OUT_OF_RESOURCE;
Status = EFI_OUT_OF_RESOURCES;
goto Exit;
}
CopyGuid (&SignatureData->SignatureOwner, &gEfiCallerIdGuid);
CopyMem (
(UINT8 *)SignatureData + sizeof (EFI_GUID),
TrustAnchor,
TrustAnchorSize
);
MeasureVariable (
PCR_INDEX_FOR_SIGNATURE_DB,
EV_EFI_SPDM_DEVICE_AUTHORITY,
EFI_DEVICE_SECURITY_DATABASE,
&gEfiDeviceSignatureDatabaseGuid,
SignatureData,
SignatureDataSize
);
FreePool (SignatureData);
}
Exit:
if (EventLog != NULL) {
FreePool (EventLog);
}
return Status;
}
/**
Measure and log Auth state and Requester and responder Nonce into NV Index.
@param[in] SpdmDeviceContext The SPDM context for the device.
@param[in] AuthState The auth state of this deice.
@param[in] RequesterNonce A buffer to hold the requester nonce (32 bytes), if not NULL.
@param[in] ResponderNonce A buffer to hold the responder nonce (32 bytes), if not NULL.
@param[out] SecurityState A pointer to the security state of the requester.
@retval EFI_SUCCESS Operation completed successfully.
@retval EFI_OUT_OF_RESOURCES Out of memory.
@retval EFI_DEVICE_ERROR The operation was unsuccessful.
**/
EFI_STATUS
ExtendAuthentication (
IN SPDM_DEVICE_CONTEXT *SpdmDeviceContext,
IN UINT8 AuthState,
IN UINT8 *RequesterNonce,
IN UINT8 *ResponderNonce,
OUT EDKII_DEVICE_SECURITY_STATE *SecurityState
)
{
EFI_STATUS Status;
{
TCG_NV_INDEX_DYNAMIC_EVENT_LOG_STRUCT_SPDM_CHALLENGE DynamicEventLogSpdmChallengeEvent;
TCG_NV_INDEX_DYNAMIC_EVENT_LOG_STRUCT_SPDM_CHALLENGE_AUTH DynamicEventLogSpdmChallengeAuthEvent;
CopyMem (DynamicEventLogSpdmChallengeEvent.Header.Signature, TCG_NV_EXTEND_INDEX_FOR_DYNAMIC_SIGNATURE, sizeof (TCG_NV_EXTEND_INDEX_FOR_DYNAMIC_SIGNATURE));
DynamicEventLogSpdmChallengeEvent.Header.Version = TCG_NV_INDEX_DYNAMIC_EVENT_LOG_STRUCT_VERSION;
ZeroMem (DynamicEventLogSpdmChallengeEvent.Header.Reserved, sizeof (DynamicEventLogSpdmChallengeEvent.Header.Reserved));
DynamicEventLogSpdmChallengeEvent.Header.Uid = SpdmDeviceContext->DeviceUID;
DynamicEventLogSpdmChallengeEvent.DescriptionSize = sizeof (TCG_SPDM_CHALLENGE_DESCRIPTION);
CopyMem (DynamicEventLogSpdmChallengeEvent.Description, TCG_SPDM_CHALLENGE_DESCRIPTION, sizeof (TCG_SPDM_CHALLENGE_DESCRIPTION));
DynamicEventLogSpdmChallengeEvent.DataSize = SPDM_NONCE_SIZE;
CopyMem (DynamicEventLogSpdmChallengeEvent.Data, RequesterNonce, SPDM_NONCE_SIZE);
Status = TpmMeasureAndLogData (
TCG_NV_EXTEND_INDEX_FOR_DYNAMIC,
EV_NO_ACTION,
&DynamicEventLogSpdmChallengeEvent,
sizeof (DynamicEventLogSpdmChallengeEvent),
&DynamicEventLogSpdmChallengeEvent,
sizeof (DynamicEventLogSpdmChallengeEvent)
);
if (EFI_ERROR (Status)) {
SecurityState->AuthenticationState = EDKII_DEVICE_SECURITY_STATE_ERROR_TCG_EXTEND_TPM_PCR;
}
DEBUG ((DEBUG_INFO, "TpmMeasureAndLogData (Dynamic) - %r\n", Status));
CopyMem (DynamicEventLogSpdmChallengeAuthEvent.Header.Signature, TCG_NV_EXTEND_INDEX_FOR_DYNAMIC_SIGNATURE, sizeof (TCG_NV_EXTEND_INDEX_FOR_DYNAMIC_SIGNATURE));
DynamicEventLogSpdmChallengeAuthEvent.Header.Version = TCG_NV_INDEX_DYNAMIC_EVENT_LOG_STRUCT_VERSION;
ZeroMem (DynamicEventLogSpdmChallengeAuthEvent.Header.Reserved, sizeof (DynamicEventLogSpdmChallengeAuthEvent.Header.Reserved));
DynamicEventLogSpdmChallengeAuthEvent.Header.Uid = SpdmDeviceContext->DeviceUID;
DynamicEventLogSpdmChallengeAuthEvent.DescriptionSize = sizeof (TCG_SPDM_CHALLENGE_AUTH_DESCRIPTION);
CopyMem (DynamicEventLogSpdmChallengeAuthEvent.Description, TCG_SPDM_CHALLENGE_AUTH_DESCRIPTION, sizeof (TCG_SPDM_CHALLENGE_AUTH_DESCRIPTION));
DynamicEventLogSpdmChallengeAuthEvent.DataSize = SPDM_NONCE_SIZE;
CopyMem (DynamicEventLogSpdmChallengeAuthEvent.Data, ResponderNonce, SPDM_NONCE_SIZE);
Status = TpmMeasureAndLogData (
TCG_NV_EXTEND_INDEX_FOR_DYNAMIC,
EV_NO_ACTION,
&DynamicEventLogSpdmChallengeAuthEvent,
sizeof (DynamicEventLogSpdmChallengeAuthEvent),
&DynamicEventLogSpdmChallengeAuthEvent,
sizeof (DynamicEventLogSpdmChallengeAuthEvent)
);
if (EFI_ERROR (Status)) {
SecurityState->AuthenticationState = EDKII_DEVICE_SECURITY_STATE_ERROR_TCG_EXTEND_TPM_PCR;
}
DEBUG ((DEBUG_INFO, "TpmMeasureAndLogData (Dynamic) - %r\n", Status));
}
return Status;
}
/**
This function gets SPDM digest and certificates.
@param[in] SpdmDeviceContext The SPDM context for the device.
@param[out] AuthState The auth state of the devices.
@param[out] ValidSlotId The number of slot for the certificate chain.
@param[out] SecurityState The security state of the requester.
@param[out] IsValidCertChain The validity of the certificate chain.
@param[out] RootCertMatch The authority of the certificate chain.
@retval EFI_SUCCESS Operation completed successfully.
@retval EFI_OUT_OF_RESOURCES Out of memory.
@retval EFI_DEVICE_ERROR The operation was unsuccessful.
**/
EFI_STATUS
EFIAPI
DoDeviceCertificate (
IN SPDM_DEVICE_CONTEXT *SpdmDeviceContext,
OUT UINT8 *AuthState,
OUT UINT8 *ValidSlotId,
OUT EDKII_DEVICE_SECURITY_STATE *SecurityState,
OUT BOOLEAN *IsValidCertChain,
OUT BOOLEAN *RootCertMatch
)
{
EFI_STATUS Status;
SPDM_RETURN SpdmReturn;
VOID *SpdmContext;
UINT32 CapabilityFlags;
UINTN DataSize;
SPDM_DATA_PARAMETER Parameter;
UINT8 SlotMask;
UINT8 TotalDigestBuffer[LIBSPDM_MAX_HASH_SIZE * SPDM_MAX_SLOT_COUNT];
UINTN CertChainSize;
UINT8 CertChain[LIBSPDM_MAX_CERT_CHAIN_SIZE];
VOID *TrustAnchor;
UINTN TrustAnchorSize;
UINT8 SlotId;
SpdmContext = SpdmDeviceContext->SpdmContext;
ZeroMem (&Parameter, sizeof (Parameter));
Parameter.location = LIBSPDM_DATA_LOCATION_CONNECTION;
DataSize = sizeof (CapabilityFlags);
SpdmReturn = SpdmGetData (SpdmContext, LIBSPDM_DATA_CAPABILITY_FLAGS, &Parameter, &CapabilityFlags, &DataSize);
if (LIBSPDM_STATUS_IS_ERROR (SpdmReturn)) {
SecurityState->AuthenticationState = EDKII_DEVICE_SECURITY_STATE_ERROR_DEVICE_ERROR;
return EFI_DEVICE_ERROR;
}
*IsValidCertChain = FALSE;
*RootCertMatch = FALSE;
CertChainSize = sizeof (CertChain);
ZeroMem (CertChain, sizeof (CertChain));
TrustAnchor = NULL;
TrustAnchorSize = 0;
//
// Init *ValidSlotId to invalid slot_id
//
*ValidSlotId = SPDM_MAX_SLOT_COUNT;
if ((CapabilityFlags & SPDM_GET_CAPABILITIES_RESPONSE_FLAGS_CERT_CAP) == 0) {
*AuthState = TCG_DEVICE_SECURITY_EVENT_DATA_DEVICE_AUTH_STATE_FAIL_NO_SIG;
SecurityState->AuthenticationState = EDKII_DEVICE_SECURITY_STATE_ERROR_DEVICE_NO_CAPABILITIES;
Status = ExtendCertificate (SpdmDeviceContext, *AuthState, 0, NULL, NULL, 0, 0, SecurityState);
return Status;
} else {
ZeroMem (TotalDigestBuffer, sizeof (TotalDigestBuffer));
SpdmReturn = SpdmGetDigest (SpdmContext, NULL, &SlotMask, TotalDigestBuffer);
if ((LIBSPDM_STATUS_IS_ERROR (SpdmReturn)) || ((SlotMask & 0x01) == 0)) {
*AuthState = TCG_DEVICE_SECURITY_EVENT_DATA_DEVICE_AUTH_STATE_FAIL_INVALID;
SecurityState->AuthenticationState = EDKII_DEVICE_SECURITY_STATE_ERROR_CERTIFIACTE_FAILURE;
SlotId = 0;
Status = ExtendCertificate (SpdmDeviceContext, *AuthState, 0, NULL, NULL, 0, SlotId, SecurityState);
return Status;
}
for (SlotId = 0; SlotId < SPDM_MAX_SLOT_COUNT; SlotId++) {
if (((SlotMask >> SlotId) & 0x01) == 0) {
continue;
}
CertChainSize = sizeof (CertChain);
ZeroMem (CertChain, sizeof (CertChain));
SpdmReturn = SpdmGetCertificateEx (SpdmContext, NULL, SlotId, &CertChainSize, CertChain, (CONST VOID **)&TrustAnchor, &TrustAnchorSize);
if (LIBSPDM_STATUS_IS_SUCCESS (SpdmReturn)) {
SecurityState->AuthenticationState = EDKII_DEVICE_SECURITY_STATE_SUCCESS;
*AuthState = TCG_DEVICE_SECURITY_EVENT_DATA_DEVICE_AUTH_STATE_SUCCESS;
*IsValidCertChain = TRUE;
break;
} else if (SpdmReturn == LIBSPDM_STATUS_VERIF_FAIL) {
*IsValidCertChain = FALSE;
*AuthState = TCG_DEVICE_SECURITY_EVENT_DATA_DEVICE_AUTH_STATE_FAIL_INVALID;
SecurityState->AuthenticationState = EDKII_DEVICE_SECURITY_STATE_ERROR_CERTIFIACTE_FAILURE;
Status = ExtendCertificate (SpdmDeviceContext, *AuthState, 0, NULL, NULL, 0, SlotId, SecurityState);
} else if (SpdmReturn == LIBSPDM_STATUS_VERIF_NO_AUTHORITY) {
*IsValidCertChain = TRUE;
*AuthState = TCG_DEVICE_SECURITY_EVENT_DATA_DEVICE_AUTH_STATE_NO_AUTH;
SecurityState->AuthenticationState = EDKII_DEVICE_SECURITY_STATE_ERROR_CERTIFIACTE_FAILURE;
*ValidSlotId = SlotId;
}
}
if ((SlotId >= SPDM_MAX_SLOT_COUNT) && (*ValidSlotId == SPDM_MAX_SLOT_COUNT)) {
SecurityState->AuthenticationState = EDKII_DEVICE_SECURITY_STATE_ERROR_DEVICE_ERROR;
return EFI_DEVICE_ERROR;
}
if (TrustAnchor != NULL) {
*RootCertMatch = TRUE;
*ValidSlotId = SlotId;
} else {
*ValidSlotId = 0;
}
DEBUG ((DEBUG_INFO, "SpdmGetCertificateEx - SpdmReturn %p, TrustAnchorSize 0x%x, RootCertMatch %d\n", SpdmReturn, TrustAnchorSize, *RootCertMatch));
return EFI_SUCCESS;
}
}
/**
This function does authentication.
@param[in] SpdmDeviceContext The SPDM context for the device.
@param[out] AuthState The auth state of the devices.
@param[in] ValidSlotId The number of slot for the certificate chain.
@param[in] IsValidCertChain Indicate the validity of CertChain
@param[in] RootCertMatch Indicate the match or mismatch for Rootcert
@param[out] SecurityState The security state of the requester.
@retval EFI_SUCCESS Operation completed successfully.
@retval EFI_OUT_OF_RESOURCES Out of memory.
@retval EFI_DEVICE_ERROR The operation was unsuccessful.
**/
EFI_STATUS
EFIAPI
DoDeviceAuthentication (
IN SPDM_DEVICE_CONTEXT *SpdmDeviceContext,
OUT UINT8 *AuthState,
IN UINT8 ValidSlotId,
IN BOOLEAN IsValidCertChain,
IN BOOLEAN RootCertMatch,
OUT EDKII_DEVICE_SECURITY_STATE *SecurityState
)
{
EFI_STATUS Status;
SPDM_RETURN SpdmReturn;
VOID *SpdmContext;
UINT32 CapabilityFlags;
UINTN DataSize;
SPDM_DATA_PARAMETER Parameter;
UINTN CertChainSize;
UINT8 CertChain[LIBSPDM_MAX_CERT_CHAIN_SIZE];
UINT8 RequesterNonce[SPDM_NONCE_SIZE];
UINT8 ResponderNonce[SPDM_NONCE_SIZE];
VOID *TrustAnchor;
UINTN TrustAnchorSize;
BOOLEAN IsValidChallengeAuthSig;
SpdmContext = SpdmDeviceContext->SpdmContext;
ZeroMem (&Parameter, sizeof (Parameter));
Parameter.location = LIBSPDM_DATA_LOCATION_CONNECTION;
DataSize = sizeof (CapabilityFlags);
SpdmReturn = SpdmGetData (SpdmContext, LIBSPDM_DATA_CAPABILITY_FLAGS, &Parameter, &CapabilityFlags, &DataSize);
if (LIBSPDM_STATUS_IS_ERROR (SpdmReturn)) {
SecurityState->AuthenticationState = EDKII_DEVICE_SECURITY_STATE_ERROR_DEVICE_ERROR;
return EFI_DEVICE_ERROR;
}
IsValidChallengeAuthSig = FALSE;
// get the valid CertChain
CertChainSize = sizeof (CertChain);
ZeroMem (CertChain, sizeof (CertChain));
SpdmReturn = SpdmGetCertificateEx (SpdmContext, NULL, ValidSlotId, &CertChainSize, CertChain, (CONST VOID **)&TrustAnchor, &TrustAnchorSize);
if ((!LIBSPDM_STATUS_IS_SUCCESS (SpdmReturn)) && (!(SpdmReturn == LIBSPDM_STATUS_VERIF_NO_AUTHORITY))) {
return EFI_DEVICE_ERROR;
}
if ((CapabilityFlags & SPDM_GET_CAPABILITIES_RESPONSE_FLAGS_CHAL_CAP) == 0) {
*AuthState = TCG_DEVICE_SECURITY_EVENT_DATA_DEVICE_AUTH_STATE_NO_BINDING;
SecurityState->AuthenticationState = EDKII_DEVICE_SECURITY_STATE_ERROR_DEVICE_NO_CAPABILITIES;
Status = ExtendCertificate (SpdmDeviceContext, *AuthState, CertChainSize, CertChain, NULL, 0, ValidSlotId, SecurityState);
return Status;
} else {
ZeroMem (RequesterNonce, sizeof (RequesterNonce));
ZeroMem (ResponderNonce, sizeof (ResponderNonce));
SpdmReturn = SpdmChallengeEx (SpdmContext, NULL, ValidSlotId, SPDM_CHALLENGE_REQUEST_NO_MEASUREMENT_SUMMARY_HASH, NULL, NULL, NULL, RequesterNonce, ResponderNonce, NULL, 0);
if (SpdmReturn == LIBSPDM_STATUS_SUCCESS) {
IsValidChallengeAuthSig = TRUE;
} else if ((LIBSPDM_STATUS_IS_ERROR (SpdmReturn))) {
IsValidChallengeAuthSig = FALSE;
*AuthState = TCG_DEVICE_SECURITY_EVENT_DATA_DEVICE_AUTH_STATE_FAIL_INVALID;
SecurityState->AuthenticationState = EDKII_DEVICE_SECURITY_STATE_ERROR_CHALLENGE_FAILURE;
Status = ExtendCertificate (SpdmDeviceContext, *AuthState, 0, NULL, NULL, 0, ValidSlotId, SecurityState);
return Status;
} else {
return EFI_DEVICE_ERROR;
}
if (IsValidCertChain && IsValidChallengeAuthSig && !RootCertMatch) {
*AuthState = TCG_DEVICE_SECURITY_EVENT_DATA_DEVICE_AUTH_STATE_NO_AUTH;
SecurityState->AuthenticationState = EDKII_DEVICE_SECURITY_STATE_ERROR_NO_CERT_PROVISION;
Status = ExtendCertificate (SpdmDeviceContext, *AuthState, CertChainSize, CertChain, NULL, 0, ValidSlotId, SecurityState);
} else if (IsValidCertChain && IsValidChallengeAuthSig && RootCertMatch) {
*AuthState = TCG_DEVICE_SECURITY_EVENT_DATA_DEVICE_AUTH_STATE_SUCCESS;
SecurityState->AuthenticationState = EDKII_DEVICE_SECURITY_STATE_SUCCESS;
Status = ExtendCertificate (SpdmDeviceContext, *AuthState, CertChainSize, CertChain, TrustAnchor, TrustAnchorSize, ValidSlotId, SecurityState);
}
Status = ExtendAuthentication (SpdmDeviceContext, *AuthState, RequesterNonce, ResponderNonce, SecurityState);
}
return Status;
}
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