/
tpmcmd.cpp
1080 lines (962 loc) · 29.3 KB
/
tpmcmd.cpp
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/*++
Copyright (c) Alex Ionescu. All rights reserved.
Module Name:
tpmcmd.cpp
Abstract:
This module implements the main logic for producing TPM2.0 commands and
handling their responses, including password authentication sessions.
Author:
Alex Ionescu (@aionescu) 11-Jun-2020 - Initial version
Environment:
Portable to any environment.
--*/
#include "tpmtool.hpp"
#include "tpmcmd.hpp"
void
TpmpFillCommandHeader (
PTPM_CMD_HEADER CommandHeader,
TPM_CC CommandCode,
TPM_ST SessionTag,
uint32_t Size
)
{
//
// Fill out the TPM Command Header
//
CommandHeader->SessionTag = static_cast<TPM_ST>(OsSwap16(SessionTag));
CommandHeader->Size = OsSwap32(Size);
CommandHeader->CommandCode = static_cast<TPM_CC>(OsSwap32(CommandCode));
}
void
TpmpFillAuthSession (
TPMS_AUTH_COMMAND_NO_NONCE* AuthSession,
uint16_t AuthorizationSize,
uint8_t* AuthorizationData,
uint8_t** CommandFooter
)
{
uint32_t authSessionSize;
int32_t i;
//
// Compute the size of the auth session, which contains the password but
// not the size of the session itself.
//
authSessionSize = offsetof(TPMS_AUTH_COMMAND_NO_NONCE, Password) +
AuthorizationSize -
sizeof(AuthSession->SessionSize);
//
// Build a password authorization session. If there's no password this will
// simply use the empty password and authenticate as owner.
//
AuthSession->SessionSize = OsSwap32(authSessionSize);
AuthSession->SessionHandle.Value = OsSwap32(TPM_RS_PW.Value);
AuthSession->NonceSize = OsSwap16(0);
AuthSession->SessionAttributes.Value = 0;
AuthSession->PasswordSize = OsSwap16(AuthorizationSize);
for (i = 0; i < AuthorizationSize; i++)
{
AuthSession->Password[i] = AuthorizationData[i];
}
//
// Return a pointer to the command footer following the session
//
if (CommandFooter != nullptr)
{
*CommandFooter = &AuthSession->Password[i];
}
}
TPM_RC
TpmUndefineSpace2 (
uintptr_t TpmHandle,
TPM_NV_INDEX HandleIndex
)
{
TPM_NV_UNDEFINE_SPACE_CMD_HEADER* commandHeader;
TPM_NV_UNDEFINE_SPACE_REPLY* reply;
uint32_t commandSize;
uint32_t replySize;
bool osResult;
//
// Allocate the command
//
commandSize = TpmEmptyCmdSize(commandHeader, 0);
commandHeader = TpmpAllocateCommand(commandHeader, commandSize);
//
// Fill out the TPM Command Header
//
TpmpFillCommandHeader(&commandHeader->Header,
TPM_CC_NV_UndefineSpace,
TPM_ST_SESSIONS,
commandSize);
//
// Use our owner handle
//
commandHeader->AuthHandle.Value = OsSwap32(TPM_RH_OWNER.Value);
//
// Fill in the index being deleted
//
commandHeader->NvIndex.Value = OsSwap32(HandleIndex.Value);
//
// Fill out an empty authorization session
//
TpmpFillAuthSession(&commandHeader->AuthSession,
0,
nullptr,
nullptr);
//
// Make space for the response
//
replySize = TpmFixedResponseSize(reply);
reply = TpmpAllocateResponse(reply, replySize);
//
// Call the OS function
//
osResult = TpmOsIssueCommand(TpmHandle,
reinterpret_cast<uint8_t*>(commandHeader),
commandSize,
reinterpret_cast<uint8_t*>(reply),
replySize,
nullptr);
if (osResult == false)
{
return TPM_RC_FAILURE;
}
//
// Return the TPM response code -- no data is returned
//
return TpmReadResponseCode(reply);
}
TPM_RC
TpmDefineSpace2 (
uintptr_t TpmHandle,
TPM_NV_INDEX HandleIndex,
uint16_t SpaceSize,
uint8_t Attributes,
uint8_t OwnerRights,
uint8_t AuthRights,
uint16_t AuthorizationSize,
uint8_t* AuthorizationData
)
{
TPM_NV_DEFINE_SPACE_CMD_HEADER* commandHeader;
TPM_NV_DEFINE_SPACE_CMD_BODY* commandData;
TPM_NV_DEFINE_SPACE_CMD_FOOTER* commandFooter;
TPM_NV_DEFINE_SPACE_REPLY* reply;
uint32_t nvAttributes;
uint32_t replySize;
bool osResult;
int32_t i;
uint32_t commandSize;
//
// Allocate the command
//
commandSize = TpmVariableCmdSize(commandHeader, 0, commandData, AuthorizationSize, commandFooter);
commandHeader = TpmpAllocateCommand(commandHeader, commandSize);
//
// Fill out the TPM Command Header
//
TpmpFillCommandHeader(&commandHeader->Header,
TPM_CC_NV_DefineSpace,
TPM_ST_SESSIONS,
commandSize);
//
// Use our owner handle
//
commandHeader->AuthHandle.Value = OsSwap32(TPM_RH_OWNER.Value);
//
// Fill out an empty authorization session
//
TpmpFillAuthSession(&commandHeader->AuthSession,
0,
nullptr,
reinterpret_cast<uint8_t**>(&commandData));
//
// Configure the password (if any) as the authorization data
//
commandData->AuthSize = OsSwap16(AuthorizationSize);
for (i = 0; i < AuthorizationSize; i++)
{
commandData->Data[i] = AuthorizationData[i];
}
//
// Finish up with the footer, which contains the NV_PUBLIC data
//
commandFooter = reinterpret_cast<decltype(commandFooter)>(&commandData->Data[i]);
commandFooter->NvPublicSize = OsSwap16(sizeof(*commandFooter) - sizeof(commandFooter->NvPublicSize));
commandFooter->NvIndex.Value = OsSwap32(HandleIndex.Value);
commandFooter->NameAlg = static_cast<TPMI_ALG_HASH>(OsSwap16(TPM_ALG_SHA256));
commandFooter->DataSize = OsSwap16(SpaceSize);
commandFooter->AuthPolicySize = 0;
//
// Write the attributes by converting both the Owner/Auth rights as well as
// the attributes the tool lets you set. Note that the read-only R/WLOCKED
// attributes are not settable, so we don't bother checking for them.
//
nvAttributes = ((((OwnerRights & TpmToolReadAccess) ==
TpmToolReadAccess) * TPMA_NV_OWNERREAD) |
(((OwnerRights & TpmToolWriteAccess) ==
TpmToolWriteAccess) * TPMA_NV_OWNERWRITE) |
(((AuthRights & TpmToolReadAccess) ==
TpmToolReadAccess) * TPMA_NV_AUTHREAD) |
(((AuthRights & TpmToolWriteAccess) ==
TpmToolWriteAccess) * TPMA_NV_AUTHWRITE));
nvAttributes |= ((((Attributes & TpmToolReadLockable) ==
TpmToolReadLockable) * TPMA_NV_READ_STCLEAR) |
(((Attributes & TpmToolWriteLockable) ==
TpmToolWriteLockable) * TPMA_NV_WRITE_STCLEAR) |
(((Attributes & TpmToolWriteOnce) ==
TpmToolWriteOnce) * TPMA_NV_WRITEDEFINE) |
(((Attributes & TpmToolWriteAll) ==
TpmToolWriteAll) * TPMA_NV_WRITEALL) |
(((Attributes & TpmToolNonProtected) ==
TpmToolNonProtected) * TPMA_NV_NO_DA) |
(((Attributes & TpmToolCached) ==
TpmToolCached) * TPMA_NV_ORDERLY) |
(((Attributes & TpmToolVolatileDirtyFlag) ==
TpmToolVolatileDirtyFlag) * TPMA_NV_CLEAR_STCLEAR) |
(((Attributes & TpmToolPermanent) ==
TpmToolPermanent) * TPMA_NV_POLICY_DELETE));
commandFooter->Attributes = static_cast<TPMA_NV>(OsSwap32(nvAttributes));
//
// Make space for the response
//
replySize = TpmFixedResponseSize(reply);
reply = TpmpAllocateResponse(reply, replySize);
//
// Call the OS function
//
osResult = TpmOsIssueCommand(TpmHandle,
reinterpret_cast<uint8_t*>(commandHeader),
commandSize,
reinterpret_cast<uint8_t*>(reply),
replySize,
nullptr);
if (osResult == false)
{
return TPM_RC_FAILURE;
}
//
// Return the TPM response code -- no data is returned
//
return TpmReadResponseCode(reply);
}
TPM_RC
TpmNvRead2 (
uintptr_t TpmHandle,
TPM_NV_INDEX HandleIndex,
uint16_t AuthorizationSize,
uint8_t* AuthorizationData,
uint16_t Offset,
uint16_t DataSize,
uint8_t* Data
)
{
TPM_NV_READ_CMD_FOOTER* commandFooter;
TPM_NV_READ_CMD_HEADER* command;
TPM_NV_READ_REPLY* reply;
uint32_t commandSize;
uint32_t replySize;
bool osResult;
TPM_RC tpmResult;
//
// Allocate the command
//
commandSize = TpmFixedCmdSize(command, AuthorizationSize, commandFooter);
command = TpmpAllocateCommand(command, commandSize);
//
// Fill out the TPM Command Header
//
TpmpFillCommandHeader(&command->Header,
TPM_CC_NV_Read,
TPM_ST_SESSIONS,
commandSize);
//
// Fill in the rest of the command header
//
command->NvIndex.Value = OsSwap32(HandleIndex.Value);
//
// Check if we're doing owner or session authorization
//
if (AuthorizationSize == 0)
{
//
// Pass in the owner pseudo-handle
//
command->AuthHandle.Value = OsSwap32(TPM_RH_OWNER.Value);
}
else
{
//
// For session authentication, we authenticate against the index itself
//
command->AuthHandle.Value = OsSwap32(HandleIndex.Value);
}
//
// Fill out the authorization session
//
TpmpFillAuthSession(&command->AuthSession,
AuthorizationSize,
AuthorizationData,
reinterpret_cast<uint8_t**>(&commandFooter));
//
// Now fill in the command footer
//
commandFooter->Offset = OsSwap16(Offset);
commandFooter->Size = OsSwap16(DataSize);
//
// Make space for the response
//
replySize = TpmVariableResponseSize(reply, DataSize);
reply = TpmpAllocateResponse(reply, replySize);
//
// Call the OS function
//
osResult = TpmOsIssueCommand(TpmHandle,
reinterpret_cast<uint8_t*>(command),
commandSize,
reinterpret_cast<uint8_t*>(reply),
replySize,
nullptr);
if (osResult == false)
{
return TPM_RC_FAILURE;
}
//
// Read the response code, and copy the result back to the caller
//
tpmResult = TpmReadResponseCode(reply);
if (tpmResult == TPM_RC_SUCCESS)
{
for (int i = 0; i < DataSize; i++)
{
Data[i] = reply->Data[i];
}
}
return tpmResult;
}
TPM_RC
TpmNvWrite2 (
uintptr_t TpmHandle,
TPM_NV_INDEX HandleIndex,
uint16_t AuthorizationSize,
uint8_t* AuthorizationData,
uint16_t Offset,
uint16_t DataSize,
uint8_t* Data
)
{
TPM_NV_WRITE_CMD_FOOTER* commandFooter;
TPM_NV_WRITE_CMD_BODY* commandData;
TPM_NV_WRITE_CMD_HEADER* command;
TPM_NV_WRITE_REPLY* reply;
uint32_t commandSize;
uint32_t replySize;
int32_t i;
bool osResult;
//
// Allocate the command
//
commandSize = TpmVariableCmdSize(command, AuthorizationSize, commandData, DataSize, commandFooter);
command = TpmpAllocateCommand(command, commandSize);
//
// Fill out the TPM Command Header
//
TpmpFillCommandHeader(&command->Header,
TPM_CC_NV_Write,
TPM_ST_SESSIONS,
commandSize);
//
// Fill in the rest of the command header
//
command->NvIndex.Value = OsSwap32(HandleIndex.Value);
//
// Check if we're doing owner or session authorization
//
if (AuthorizationSize == 0)
{
//
// Pass in the owner pseudo-handle
//
command->AuthHandle.Value = OsSwap32(TPM_RH_OWNER.Value);
}
else
{
//
// For session authentication, we authenticate against the index itself
//
command->AuthHandle.Value = OsSwap32(HandleIndex.Value);
}
//
// Fill out the authorization session
//
TpmpFillAuthSession(&command->AuthSession,
AuthorizationSize,
AuthorizationData,
reinterpret_cast<uint8_t**>(&commandData));
//
// Fill out the command data
//
commandData->Size = OsSwap16(DataSize);
for (i = 0; i < DataSize; i++)
{
commandData->Data[i] = Data[i];
}
//
// Finish up with the footer
//
commandFooter = reinterpret_cast<decltype(commandFooter)>(&commandData->Data[i]);
commandFooter->Offset = OsSwap16(Offset);
//
// Make space for the response
//
replySize = TpmFixedResponseSize(reply);
reply = TpmpAllocateResponse(reply, replySize);
//
// Call the OS function
//
osResult = TpmOsIssueCommand(TpmHandle,
reinterpret_cast<uint8_t*>(command),
commandSize,
(uint8_t*)reply,
replySize,
nullptr);
if (osResult == false)
{
return TPM_RC_FAILURE;
}
//
// Return the TPM response code -- no data is returned
//
return TpmReadResponseCode(reply);
}
TPM_RC
TpmpLock2 (
uintptr_t TpmHandle,
TPM_NV_INDEX HandleIndex,
bool WriteLock,
uint16_t AuthorizationSize,
uint8_t* AuthorizationData
)
{
TPM_NV_READ_LOCK_CMD_HEADER* command;
TPM_NV_READ_LOCK_REPLY* reply;
uint32_t commandSize;
uint32_t replySize;
bool osResult;
//
// Allocate the command
//
commandSize = TpmEmptyCmdSize(command, AuthorizationSize);
command = TpmpAllocateCommand(command, commandSize);
//
// Fill out the TPM Command Header
//
TpmpFillCommandHeader(&command->Header,
WriteLock ? TPM_CC_NV_WriteLock : TPM_CC_NV_ReadLock,
TPM_ST_SESSIONS,
commandSize);
//
// Fill in the index being locked
//
command->NvIndex.Value = OsSwap32(HandleIndex.Value);
//
// Check if we're doing owner or session authorization
//
if (AuthorizationSize == 0)
{
//
// Pass in the owner pseudo-handle
//
command->AuthHandle.Value = OsSwap32(TPM_RH_OWNER.Value);
}
else
{
//
// For session authentication, we authenticate against the index itself
//
command->AuthHandle.Value = OsSwap32(HandleIndex.Value);
}
//
// Fill out the authorization session
//
TpmpFillAuthSession(&command->AuthSession,
AuthorizationSize,
AuthorizationData,
nullptr);
//
// Make space for the response
//
replySize = TpmFixedResponseSize(reply);
reply = TpmpAllocateResponse(reply, replySize);
//
// Call the OS function
//
osResult = TpmOsIssueCommand(TpmHandle,
reinterpret_cast<uint8_t*>(command),
commandSize,
reinterpret_cast<uint8_t*>(reply),
replySize,
nullptr);
if (osResult == false)
{
return TPM_RC_FAILURE;
}
//
// Return the TPM response code -- no data is returned
//
return TpmReadResponseCode(reply);
}
TPM_RC
TpmWriteLock2 (
uintptr_t TpmHandle,
TPM_NV_INDEX HandleIndex,
uint16_t AuthorizationSize,
uint8_t* AuthorizationData
)
{
//
// Call the helper with the write parameter
//
return TpmpLock2(TpmHandle,
HandleIndex,
true,
AuthorizationSize,
AuthorizationData);
}
TPM_RC
TpmReadLock2 (
uintptr_t TpmHandle,
TPM_NV_INDEX HandleIndex,
uint16_t AuthorizationSize,
uint8_t* AuthorizationData
)
{
//
// Call the helper with the read parameter
//
return TpmpLock2(TpmHandle,
HandleIndex,
false,
AuthorizationSize,
AuthorizationData);
}
TPM_RC
TpmReadPublic2 (
uintptr_t TpmHandle,
TPM_NV_INDEX HandleIndex,
uint16_t* Attributes,
uint8_t* OwnerRights,
uint8_t* AuthRights,
uint16_t* DataSize
)
{
TPM_NV_READ_PUBLIC_CMD_HEADER* command;
TPM_NV_READ_PUBLIC_REPLY* reply;
uint32_t commandSize;
uint32_t replySize;
uint32_t nvAtributes;
bool osResult;
TPM_RC tpmResult;
//
// Allocate the command
//
commandSize = sizeof(*command);
command = TpmpAllocateCommand(command, commandSize);
//
// Fill out the TPM Command Header
//
TpmpFillCommandHeader(&command->Header,
TPM_CC_NV_ReadPublic,
TPM_ST_NO_SESSIONS,
commandSize);
//
// Fill in the index being read
//
command->NvIndex.Value = OsSwap32(HandleIndex.Value);
//
// Make space for the response
//
replySize = TpmFixedResponseSize(reply);
reply = TpmpAllocateResponse(reply, replySize);
//
// Call the OS function
//
osResult = TpmOsIssueCommand(TpmHandle,
reinterpret_cast<uint8_t*>(command),
commandSize,
reinterpret_cast<uint8_t*>(reply),
replySize,
nullptr);
if (osResult == false)
{
return TPM_RC_FAILURE;
}
//
// Read the response code, keep going only if we got success
//
tpmResult = TpmReadResponseCode(reply);
if (tpmResult != TPM_RC_SUCCESS)
{
return tpmResult;
}
//
// Read the size of the variable back
//
*DataSize = OsSwap16(reply->NvPublic.DataSize);
//
// Read the attributes back
//
nvAtributes = OsSwap32(reply->NvPublic.Attributes);
//
// Convert the owner rights into our format
//
*OwnerRights = ((((nvAtributes & TPMA_NV_OWNERREAD) ==
TPMA_NV_OWNERREAD) * TpmToolReadAccess) |
(((nvAtributes & TPMA_NV_OWNERWRITE) ==
TPMA_NV_OWNERWRITE) * TpmToolWriteAccess));
//
// Convert the auth rights into our format
//
*AuthRights = ((((nvAtributes & TPMA_NV_AUTHREAD) ==
TPMA_NV_AUTHREAD) * TpmToolReadAccess) |
(((nvAtributes & TPMA_NV_AUTHWRITE) ==
TPMA_NV_AUTHWRITE) * TpmToolWriteAccess));
//
// Finally, convert the rest of the attributes
//
*Attributes = ((((nvAtributes & TPMA_NV_READ_STCLEAR) ==
TPMA_NV_READ_STCLEAR) * TpmToolReadLockable) |
(((nvAtributes & TPMA_NV_WRITE_STCLEAR) ==
TPMA_NV_WRITE_STCLEAR) * TpmToolWriteLockable) |
(((nvAtributes & TPMA_NV_WRITEDEFINE) ==
TPMA_NV_WRITEDEFINE) * TpmToolWriteOnce) |
(((nvAtributes & TPMA_NV_WRITEALL) ==
TPMA_NV_WRITEALL) * TpmToolWriteAll) |
(((nvAtributes & TPMA_NV_NO_DA) ==
TPMA_NV_NO_DA) * TpmToolNonProtected) |
(((nvAtributes & TPMA_NV_ORDERLY) ==
TPMA_NV_ORDERLY) * TpmToolCached) |
(((nvAtributes & TPMA_NV_CLEAR_STCLEAR) ==
TPMA_NV_CLEAR_STCLEAR) * TpmToolVolatileDirtyFlag) |
(((nvAtributes & TPMA_NV_POLICY_DELETE) ==
TPMA_NV_POLICY_DELETE) * TpmToolPermanent) |
(((nvAtributes & TPMA_NV_READLOCKED) ==
TPMA_NV_READLOCKED) * TpmToolReadLocked) |
(((nvAtributes & TPMA_NV_WRITELOCKED) ==
TPMA_NV_WRITELOCKED) * TpmToolWriteLocked) |
(((nvAtributes & TPMA_NV_WRITTEN) ==
TPMA_NV_WRITTEN) * TpmToolWritten) |
(((nvAtributes & TPMA_NV_PLATFORMCREATE) ==
TPMA_NV_PLATFORMCREATE) * TpmToolPlatformOwned));
//
// Finally, return the TPM response code
//
return tpmResult;
}
TPM_RC
TpmNvEnumerate2 (
uintptr_t TpmHandle,
uint32_t* IndexCount,
TPM_NV_INDEX* IndexArray
)
{
TPM_GET_CAPABILITY_CMD_HEADER* command;
TPM_GET_CAPABILITY_REPLY* reply;
uint32_t commandSize;
uint32_t replySize;
bool osResult;
uint32_t i;
uint32_t handleCount;
TPM_RC tpmResult;
//
// Allocate the command
//
commandSize = sizeof(*command);
command = TpmpAllocateCommand(command, commandSize);
//
// Fill out the TPM Command Header
//
TpmpFillCommandHeader(&command->Header,
TPM_CC_GetCapability,
TPM_ST_NO_SESSIONS,
commandSize);
//
// Fill in the property query request
//
handleCount = sizeof(reply->Data.Data.Handles.Handle) /
sizeof(reply->Data.Data.Handles.Handle[0]);
command->Capability = static_cast<TPM_CAP>(OsSwap32(TPM_CAP_HANDLES));
command->Property = static_cast<TPM_PT>(OsSwap32(HR_NV_INDEX));
command->PropertyCount = OsSwap32(handleCount);
//
// Make space for the response
//
replySize = TpmFixedResponseSize(reply);
reply = TpmpAllocateResponse(reply, replySize);
//
// Call the OS function
//
osResult = TpmOsIssueCommand(TpmHandle,
reinterpret_cast<uint8_t*>(command),
commandSize,
reinterpret_cast<uint8_t*>(reply),
replySize,
nullptr);
if (osResult == false)
{
return TPM_RC_FAILURE;
}
//
// Read the response code, keep going only if we got success
//
tpmResult = TpmReadResponseCode(reply);
if (tpmResult != TPM_RC_SUCCESS)
{
return tpmResult;
}
//
// Now we know how many NV handles exist. Did the caller specify a smaller
// number?
//
handleCount = OsSwap32(reply->Data.Data.Handles.Count);
if (*IndexCount < handleCount)
{
//
// In this case, use the caller's number, and also let them know what
// the true count is.
//
handleCount = *IndexCount;
*IndexCount = OsSwap32(reply->Data.Data.Handles.Count);
}
//
// Enumerate either all the handles, or as few as the caller asked for
//
for (i = 0; i < handleCount; i++)
{
IndexArray[i].Value = OsSwap32(reply->Data.Data.Handles.Handle[i].Value);
}
//
// Finally, return the TPM response code
//
return tpmResult;
}
TPM_RC
TpmGetRandom (
uintptr_t TpmHandle,
uint16_t* BytesRequested,
uint8_t* RandomBytes
)
{
TPM_GET_RANDOM_CMD_HEADER* command;
TPM_GET_RANDOM_REPLY* reply;
uint32_t commandSize;
uint32_t replySize;
uint16_t bytesReturned;
bool osResult;
TPM_RC tpmResult;
//
// Allocate the command
//
commandSize = sizeof(*command);
command = TpmpAllocateCommand(command, commandSize);
//
// Fill out the TPM Command Header
//
TpmpFillCommandHeader(&command->Header,
TPM_CC_GetRandom,
TPM_ST_NO_SESSIONS,
commandSize);
//
// Fill in the get random query request
//
command->BytesRequested = OsSwap16(*BytesRequested);
//
// Make space for the response
//
replySize = TpmFixedResponseSize(reply);
reply = TpmpAllocateResponse(reply, replySize);
//
// Call the OS function
//
osResult = TpmOsIssueCommand(TpmHandle,
reinterpret_cast<uint8_t*>(command),
commandSize,
reinterpret_cast<uint8_t*>(reply),
replySize,
nullptr);
if (osResult == false)
{
return TPM_RC_FAILURE;
}
//
// Read the response code, keep going only if we got success
//
tpmResult = TpmReadResponseCode(reply);
if (tpmResult != TPM_RC_SUCCESS)
{
return tpmResult;
}
//
// Read and return the response data
//
bytesReturned = OsSwap16(reply->RandomBytes.BufferSize);
for (int i = 0; i < bytesReturned; i++)
{
RandomBytes[i] = reply->RandomBytes.Buffer.Digest.Sha256[i - 2];
}
*BytesRequested = bytesReturned;
//
// Finally, return the TPM response code
//
return tpmResult;
}
TPM_RC
TpmReadClock (
uintptr_t TpmHandle,
uint64_t* Time,
uint64_t* Clock,
uint32_t* RestartCount,
uint32_t* ResetCount,
TPMI_YES_NO* IsSafe
)
{
TPM_READ_CLOCK_CMD_HEADER* command;
TPM_READ_CLOCK_REPLY* reply;
uint32_t commandSize;
uint32_t replySize;
bool osResult;
TPM_RC tpmResult;
//
// Allocate the command
//
commandSize = sizeof(*command);
command = TpmpAllocateCommand(command, commandSize);
//
// Fill out the TPM Command Header
//
TpmpFillCommandHeader(&command->Header,
TPM_CC_ReadClock,
TPM_ST_NO_SESSIONS,
commandSize);
//
// Make space for the response
//
replySize = TpmFixedResponseSize(reply);
reply = TpmpAllocateResponse(reply, replySize);
//
// Call the OS function
//
osResult = TpmOsIssueCommand(TpmHandle,
reinterpret_cast<uint8_t*>(command),
commandSize,
reinterpret_cast<uint8_t*>(reply),
replySize,
nullptr);
if (osResult == false)
{
return TPM_RC_FAILURE;
}
//
// Read the response code, keep going only if we got success
//
tpmResult = TpmReadResponseCode(reply);
if (tpmResult != TPM_RC_SUCCESS)
{
return tpmResult;
}
//
// Read and return the response data
//
*Time = OsSwap64(reply->TimeInfo.Time);
*Clock = OsSwap64(reply->TimeInfo.ClockInfo.Clock);
*RestartCount = OsSwap32(reply->TimeInfo.ClockInfo.RestartCount);
*ResetCount = OsSwap32(reply->TimeInfo.ClockInfo.ResetCount);
*IsSafe = reply->TimeInfo.ClockInfo.Safe;
//
// Finally, return the TPM response code
//
return tpmResult;
}
TPM_RC
TpmHash (
uintptr_t TpmHandle,
uint16_t InputSize,
uint8_t* InputData,
uint8_t* OutputData
)
{
TPM_HASH_CMD_HEADER* commandHeader;
TPM_HASH_CMD_BODY* commandData;
TPM_HASH_CMD_FOOTER* commandFooter;
TPM_HASH_CMD_REPLY* reply;