/// <summary>
/// Updates TBS context database for commands that either fill or empty slots.
/// </summary>
/// <param name="caller"></param>
/// <param name="command"></param>
/// <param name="responseHandles"></param>
/// <param name="inputObjects"></param>
private void ProcessUpdatedTpmState(TbsContext caller, CommandInfo command, TpmHandle[] responseHandles, ObjectContext[] inputObjects)
{
switch (command.CommandCode)
{
// Commands that fill a slot (apart from contextLoad, which is more complex)
case TpmCc.Load:
case TpmCc.LoadExternal:
case TpmCc.CreatePrimary:
case TpmCc.HmacStart:
case TpmCc.HashSequenceStart:
case TpmCc.StartAuthSession:
var t = new TpmHandle(responseHandles[0].handle);
// ReSharper disable once UnusedVariable
ObjectContext context2 = ContextManager.CreateObjectContext(caller, t);
break;
case TpmCc.ContextLoad:
case TpmCc.ContextSave:
throw new Exception("should not be here");
case TpmCc.FlushContext:
case TpmCc.SequenceComplete:
ContextManager.Remove(inputObjects[0]);
break;
case TpmCc.EventSequenceComplete:
ContextManager.Remove(inputObjects[1]);
break;
}
}
/// <summary>
/// Removes all TPM objects referenced by this context and then removes the context from the TBS database.
/// </summary>
/// <param name="c"></param>
public void DisposeContext(TbsContext c)
{
lock (this)
{
foreach (ObjectContext o in ContextManager.ObjectContexts)
{
if (o.Owner != c)
{
continue;
}
if (o.Loaded)
{
Tpm.FlushContext(o.TheTpmHandle);
o.Loaded = false;
}
else
{
if (o.TheSlotType == SlotType.SessionSlot)
{
// TODO: Need to flush saved sessions?
// Tpm.FlushContext(o.TheTpmHandle);
Tpm.FlushContext(o.Context.savedHandle);
}
}
}
ContextManager.RemoveAll(c);
}
}
/// <summary>
/// Look up TBS ObjectContext records given the handles in the inHandles input parms.
/// </summary>
/// <param name="caller"></param>
/// <param name="inHandles"></param>
/// <returns></returns>
private ObjectContext[] GetReferencedObjects(TbsContext caller, TpmHandle[] inHandles)
{
var neededContexts = new ObjectContext[inHandles.Length];
for (int j = 0; j < inHandles.Length; j++)
{
neededContexts[j] = ContextManager.GetContext(caller, inHandles[j]);
if (neededContexts[j] == null)
{
return(null);
}
}
return(neededContexts);
}
/// <summary>
/// Get the TBS ObjectContext given SessionIn objects collected from the inputs stream.
/// </summary>
/// <param name="caller"></param>
/// <param name="inSessions"></param>
/// <returns></returns>
private ObjectContext[] GetSessions(TbsContext caller, SessionIn[] inSessions)
{
var contexts = new ObjectContext[inSessions.Length];
for (int j = 0; j < inSessions.Length; j++)
{
contexts[j] = ContextManager.GetContext(caller, inSessions[j].handle);
if (contexts[j] == null)
{
return(null);
}
}
return(contexts);
}
public TbsContext CreateTbsContext()
{
lock (this)
{
TbsContext newContext = null;
try
{
newContext = new TbsContext(this);
return(newContext);
}
catch (Exception)
{
if (newContext != null)
{
newContext.Dispose();
}
return(null);
}
}
}
public TbsContext CreateTbsContext()
{
lock (this)
{
TbsContext newContext = null;
try
{
newContext = new TbsContext(this);
return newContext;
}
catch (Exception)
{
if (newContext != null)
{
newContext.Dispose();
}
return null;
}
}
}
/// <summary>
/// Removes all TPM objects referenced by this context and then removes
/// the context from the TBS database.
/// </summary>
/// <param name="c"></param>
public void DisposeContext(TbsContext c)
{
lock (this)
{
foreach (ObjectContext o in ContextManager.ObjectContexts)
{
if (o.Owner != c)
{
continue;
}
if (o.Loaded)
{
Tpm._AllowErrors()
.FlushContext(o.TheTpmHandle);
if (!Tpm._LastCommandSucceeded())
{
Debug.WriteLine("TRM failed to flush a handle: {0:X8}", o.TheTpmHandle);
}
o.Loaded = false;
}
}
ContextManager.RemoveAll(c);
}
}
void ProcessTpmClear(TbsContext caller, Tbs.SlotType excluded = Tbs.SlotType.NoSlot)
{
ContextManager.ObjectContexts.RemoveAll(ctx => ctx.Owner == caller &&
ctx.TheSlotType != excluded);
Debug.Assert(excluded != Tbs.SlotType.NoSlot || ContextManager.ObjectContexts.Count == 0);
}
/// <summary>
/// Dispatch a command to the underlying TPM. This method implements all
/// significant functionality. It examines the command stream and performs
/// (approximately) the following actions:
/// 1) If the command references a handle (session or transient object), then
/// TBS makes sure that the entity is loaded. If it is, then the handle is
/// "translated" to the underlying TPM handle. If it is not, then TBS checks
/// to see if it has a saved context for the entity, and if so, loads it.
/// 2) If the command will fill a slot, then TBS ensures that a slot is available.
/// It does this by ContextSaving the LRU entity of the proper type (that is
/// not used in this command).
/// </summary>
/// <param name="caller"></param>
/// <param name="active"></param>
/// <param name="inBuf"></param>
/// <param name="outBuf"></param>
/// <exception cref="Exception"></exception>
internal void DispatchCommand(TbsContext caller, CommandModifier active, byte[] inBuf, out byte[] outBuf)
{
lock (this)
{
CommandNumber++;
// ReSharper disable once CompareOfFloatsByEqualityOperator
if (StateSaveProbability != 0.0)
{
// S3 debug support
DebugStateSave();
LastStateSaveCommandNumber = CommandNumber;
}
CommandHeader commandHeader;
TpmHandle[] inHandles;
SessionIn[] inSessions;
byte[] commandParmsNoHandles;
bool legalCommand = CommandProcessor.CrackCommand(inBuf,
out commandHeader, out inHandles, out inSessions, out commandParmsNoHandles);
if (!legalCommand)
{
// Is a diagnostics command. Pass through to TPM (a real RM would refuse).
TpmDevice.DispatchCommand(active, inBuf, out outBuf);
return;
}
TpmCc cc = commandHeader.CommandCode;
// Lookup command
CommandInfo command = Tpm2.CommandInfoFromCommandCode(cc);
if (command == null)
{
throw new Exception("Unrecognized command");
}
if (cc == TpmCc.ContextLoad || cc == TpmCc.ContextSave)
{
Debug.WriteLine("ContextLoad and ContextSave are not supported in this build");
outBuf = Marshaller.GetTpmRepresentation(new Object[] {
TpmSt.NoSessions,
(uint)10,
TpmRc.NotUsed
});
}
// Look up referenced objects and sessions
ObjectContext[] neededObjects = GetReferencedObjects(caller, inHandles);
ObjectContext[] neededSessions = GetSessions(caller, inSessions);
ObjectContext[] neededEntities =
neededObjects != null
? neededSessions != null
? neededObjects.Concat(neededSessions).ToArray()
: neededObjects
: neededSessions;
#if false
// LibTester may intentionally use invalid handles, therefore it always
// work in the passthru mode (all correctness checks by TSS infra suppressed)
if (!Tpm2._TssBehavior.Passthrough &&
(neededObjects == null || neededSessions == null))
#endif
if (neededObjects == null || neededSessions == null)
{
// One or more of the handles was not registered for the context
byte[] ret = FormatError(TpmRc.Handle);
outBuf = ret;
return;
}
// Load referenced objects and sessions (free slots if needed)
// It's important to load all object and session handles in a single call
// to LoadEntities(), as for some commands (e.g. GetSessionAuditDigest)
// the objects array may contain session handles. In this case the session
// handles loaded by the invocation of LoadEntities for neededObjects
// may be evicted again during the subsequent call for neededSessions.
var expectedResponses = Tpm._GetExpectedResponses();
if (!LoadEntities(neededEntities))
{
throw new Exception("Failed to make space for objects or sessions");
}
else
{
// At this point everything referenced should be loaded, and
// there will be a free slot if needed so we can translate
// the input handles to the underlying handles
ReplaceHandlesIn(inHandles, inSessions, neededObjects, neededSessions);
}
// Re-create the command using translated object and session handles
byte[] commandBuf = CommandProcessor.CreateCommand(commandHeader.CommandCode,
inHandles, inSessions, commandParmsNoHandles);
if (!Tpm2._TssBehavior.Passthrough)
{
Debug.Assert(commandBuf.Length == inBuf.Length);
}
byte[] responseBuf;
// TODO: Virtualize TPM2_GetCapability() for handle enumeration.
//
// Execute command on underlying TPM device.
// If we get an ObjectMemory or SessionMemory error we try to make more space and try again
// Note: If the TPM device throws an error above we let it propagate out. There should be no side
// effects on TPM state that the TBS cares about.
//
ulong firstCtxSeqNum = 0;
while (true)
{
Tpm._ExpectResponses(expectedResponses);
TpmDevice.DispatchCommand(active, commandBuf, out responseBuf);
TpmRc res = GetResultCode(responseBuf);
if (res == TpmRc.Success ||
expectedResponses != null && expectedResponses.Contains(res))
{
break;
}
if (res == TpmRc.ContextGap)
{
ulong seqNum = ShortenSessionContextGap(firstCtxSeqNum);
if (seqNum == 0)
{
break; // Failed to handle CONTEXT_GAP error
}
if (firstCtxSeqNum == 0)
{
firstCtxSeqNum = seqNum;
}
//if (firstCtxSeqNum != 0)
// Console.WriteLine("DispatchCommand: CONTEXT_GAP handled");
continue;
}
var slotType = SlotType.NoSlot;
if (res == TpmRc.ObjectHandles || res == TpmRc.ObjectMemory)
{
slotType = SlotType.ObjectSlot;
}
else if (res == TpmRc.SessionHandles || res == TpmRc.SessionMemory)
{
slotType = SlotType.SessionSlot;
}
else
{
// Command failure not related to resources
break;
}
if (!MakeSpace(slotType, neededEntities))
{
// Failed to make an object slot in the TPM
responseBuf = TpmErrorHelpers.BuildErrorResponseBuffer(TpmRc.Memory);
break;
}
}
// Parse the response from the TPM
TpmSt responseTag;
uint responseParamSize;
TpmRc resultCode;
TpmHandle[] responseHandles;
SessionOut[] responseSessions;
byte[] responseParmsNoHandles, responseParmsWithHandles;
CommandProcessor.SplitResponse(responseBuf,
command.HandleCountOut,
out responseTag,
out responseParamSize,
out resultCode,
out responseHandles,
out responseSessions,
out responseParmsNoHandles,
out responseParmsWithHandles);
// In case of an error there is no impact on the loaded sessions, but
// we update the LRU values because the user will likely try again.
if (resultCode != TpmRc.Success)
{
outBuf = responseBuf;
UpdateLastUseCount(new[] { neededObjects, neededSessions });
return;
}
// Update TBS database with any newly created TPM objects
ProcessUpdatedTpmState(caller, command, responseHandles, neededObjects);
// And if there were any newly created objects use the new DB entries
// to translate the handles
ReplaceHandlesOut(responseHandles);
outBuf = CommandProcessor.CreateResponse(resultCode, responseHandles,
responseSessions, responseParmsNoHandles);
Debug.Assert(outBuf.Length == responseBuf.Length);
} // lock(this)
}
/// <summary>
/// Dispatch a command to the underlying TPM. This method implements all significant functionality.
/// DispatchCommand examines the command stream and performs (approximately) the following functions
/// 1) If the command references a handle (session or transient object) then TBS makes sure that the entity
/// is loaded. If it is, then the handle is "translated" to the underlying TPM handle. If it is not, then
/// TBS checks to see if it has a saved context for the entity, and if so loads it.
/// 2) If the command will fill a slot, then TBS ensures that a slot is available. It does this by ContextSaving
/// the LRU entity of the proper type (that is not used in this command).
/// </summary>
/// <param name="caller"></param>
/// <param name="active"></param>
/// <param name="inBuf"></param>
/// <param name="outBuf"></param>
/// <exception cref="Exception"></exception>
internal void DispatchCommand(TbsContext caller, CommandModifier active, byte[] inBuf, out byte[] outBuf)
{
lock (this)
{
CommandNumber++;
// ReSharper disable once CompareOfFloatsByEqualityOperator
if (StateSaveProbability != 0.0)
{
// S3 debug support
DebugStateSave();
LastStateSaveCommandNumber = CommandNumber;
}
CommandHeader commandHeader;
TpmHandle[] inHandles;
SessionIn[] inSessions;
byte[] commandParmsNoHandles;
bool legalCommand = CommandProcessor.CrackCommand(inBuf, out commandHeader, out inHandles, out inSessions, out commandParmsNoHandles);
if (!legalCommand)
{
// Is a diagnostics command. Pass through to TPM (a real RM would refuse).
TpmDevice.DispatchCommand(active, inBuf, out outBuf);
return;
}
TpmCc commandCode = commandHeader.CommandCode;
// Lookup command
CommandInfo command = Tpm2.CommandInfoFromCommandCode(commandCode);
if (command == null)
{
throw new Exception("Unrecognized command");
}
if (commandCode == TpmCc.ContextLoad || commandCode == TpmCc.ContextSave)
{
//throw new Exception("ContextLoad and ContextSave not supported in this build");
Console.Error.WriteLine("ContextLoad and ContextSave not supported in this build");
outBuf = Marshaller.GetTpmRepresentation(new Object[] {
TpmSt.NoSessions,
(uint)10,
TpmRc.NotUsed
});
}
// Look up referenced objects and sessions
ObjectContext[] neededObjects = GetReferencedObjects(caller, inHandles);
ObjectContext[] neededSessions = GetSessions(caller, inSessions);
if (neededObjects == null || neededSessions == null)
{
// This means that one or more of the handles was not registered for the context
byte[] ret = FormatError(TpmRc.Handle);
outBuf = ret;
return;
}
// Load referenced objects and sessions (free slots if needed)
bool loadOk = LoadEntities(neededObjects);
bool loadOk2 = LoadEntities(neededSessions);
if (!loadOk || !loadOk2)
{
throw new Exception("Failed to make space for objects or sessions at to execute command");
}
// At this point everything referenced should be loaded, and there will be a free slot if needed
// so we can translate the input handles to the underlying handles
ReplaceHandlesIn(inHandles, inSessions, neededObjects, neededSessions);
// create the translated command from the various components we have been manipulating
byte[] commandBuf = CommandProcessor.CreateCommand(commandHeader.CommandCode, inHandles, inSessions, commandParmsNoHandles);
Debug.Assert(commandBuf.Length == inBuf.Length);
byte[] responseBuf;
// Todo: Virtualize GetCapability for handle enumeration.
//
// Execute command on underlying TPM device.
// If we get an ObjectMemory or SessionMemory error we try to make more space and try again
// Note: If the TPM device throws an error above we let it propagate out. There should be no side
// effects on TPM state that the TBS cares about.
//
do
{
TpmDevice.DispatchCommand(active, commandBuf, out responseBuf);
TpmRc resCode = GetResultCode(responseBuf);
if (resCode == TpmRc.Success)
{
break;
}
if (resCode == TpmRc.ObjectMemory)
{
bool slotMade = MakeSpace(SlotType.ObjectSlot, neededObjects);
if (!slotMade)
{
throw new Exception("Failed to make an object slot in the TPM");
}
continue;
}
if (resCode == TpmRc.SessionMemory)
{
bool slotMade = MakeSpace(SlotType.SessionSlot, neededSessions);
if (!slotMade)
{
throw new Exception("Failed to make a session slot in the TPM");
}
continue;
}
break;
} while (true);
// Parse the response from the TPM
// TODO: Make this use the new methods in Tpm2
// ReSharper disable once UnusedVariable
var mOut = new Marshaller(responseBuf);
TpmSt responseTag;
uint responseParamSize;
TpmRc resultCode;
TpmHandle[] responseHandles;
SessionOut[] responseSessions;
byte[] responseParmsNoHandles, responseParmsWithHandles;
CommandProcessor.SplitResponse(responseBuf,
command.HandleCountOut,
out responseTag,
out responseParamSize,
out resultCode,
out responseHandles,
out responseSessions,
out responseParmsNoHandles,
out responseParmsWithHandles);
// If we have an error there is no impact on the loaded sessions, but we update
// the LRU values because the user will likely try again.
if (resultCode != TpmRc.Success)
{
outBuf = responseBuf;
UpdateLastUseCount(new[] { neededObjects, neededSessions });
return;
}
// Update TBS database with any newly created TPM objects
ProcessUpdatedTpmState(caller, command, responseHandles, neededObjects);
// And if there were any newly created objects use the new DB entries to translate the handles
ReplaceHandlesOut(responseHandles);
byte[] translatedResponse = CommandProcessor.CreateResponse(resultCode, responseHandles, responseSessions, responseParmsNoHandles);
outBuf = translatedResponse;
Debug.Assert(outBuf.Length == responseBuf.Length);
} // lock(this)
}
/// <summary>
/// Look up TBS ObjectContext records given the handles in the inHandles input parms.
/// </summary>
/// <param name="caller"></param>
/// <param name="inHandles"></param>
/// <returns></returns>
private ObjectContext[] GetReferencedObjects(TbsContext caller, TpmHandle[] inHandles)
{
var neededContexts = new ObjectContext[inHandles.Length];
for (int j = 0; j < inHandles.Length; j++)
{
neededContexts[j] = ContextManager.GetContext(caller, inHandles[j]);
if (neededContexts[j] == null)
{
return null;
}
}
return neededContexts;
}
/// <summary>
/// Removes all TPM objects referenced by this context and then removes the context from the TBS database.
/// </summary>
/// <param name="c"></param>
public void DisposeContext(TbsContext c)
{
lock (this)
{
foreach (ObjectContext o in ContextManager.ObjectContexts)
{
if (o.Owner != c)
{
continue;
}
if (o.Loaded)
{
Tpm.FlushContext(o.TheTpmHandle);
o.Loaded = false;
}
else
{
if (o.TheSlotType == SlotType.SessionSlot)
{
// TODO: Need to flush saved sessions?
// Tpm.FlushContext(o.TheTpmHandle);
Tpm.FlushContext(o.Context.savedHandle);
}
}
}
ContextManager.RemoveAll(c);
}
}
/// <summary>
/// Get the TBS ObjectContext given SessionIn objects collected from the inputs stream.
/// </summary>
/// <param name="caller"></param>
/// <param name="inSessions"></param>
/// <returns></returns>
private ObjectContext[] GetSessions(TbsContext caller, SessionIn[] inSessions)
{
var contexts = new ObjectContext[inSessions.Length];
for (int j = 0; j < inSessions.Length; j++)
{
contexts[j] = ContextManager.GetContext(caller, inSessions[j].handle);
if (contexts[j] == null)
{
return null;
}
}
return contexts;
}
/// <summary>
/// Updates TBS context database for commands that either fill or empty slots.
/// </summary>
/// <param name="caller"></param>
/// <param name="command"></param>
/// <param name="responseHandles"></param>
/// <param name="inputObjects"></param>
private void ProcessUpdatedTpmState(TbsContext caller, CommandInfo command, TpmHandle[] responseHandles, ObjectContext[] inputObjects)
{
switch (command.CommandCode)
{
// Commands that fill a slot (apart from contextLoad, which is more complex)
case TpmCc.Load:
case TpmCc.LoadExternal:
case TpmCc.CreatePrimary:
case TpmCc.HmacStart:
case TpmCc.HashSequenceStart:
case TpmCc.StartAuthSession:
var t = new TpmHandle(responseHandles[0].handle);
// ReSharper disable once UnusedVariable
ObjectContext context2 = ContextManager.CreateObjectContext(caller, t);
break;
case TpmCc.ContextLoad:
case TpmCc.ContextSave:
throw new Exception("ProcessUpdatedTpmState: Should not be here");
case TpmCc.FlushContext:
case TpmCc.SequenceComplete:
ContextManager.Remove(inputObjects[0]);
break;
case TpmCc.EventSequenceComplete:
ContextManager.Remove(inputObjects[1]);
break;
}
}
/// <summary>
/// Dispatch a command to the underlying TPM. This method implements all significant functionality.
/// DispatchCommand examines the command stream and performs (approximately) the following functions
/// 1) If the command references a handle (session or transient object) then TBS makes sure that the entity
/// is loaded. If it is, then the handle is "translated" to the underlying TPM handle. If it is not, then
/// TBS checks to see if it has a saved context for the entity, and if so loads it.
/// 2) If the command will fill a slot, then TBS ensures that a slot is available. It does this by ContextSaving
/// the LRU entity of the proper type (that is not used in this command).
/// </summary>
/// <param name="caller"></param>
/// <param name="active"></param>
/// <param name="inBuf"></param>
/// <param name="outBuf"></param>
/// <exception cref="Exception"></exception>
internal void DispatchCommand(TbsContext caller, CommandModifier active, byte[] inBuf, out byte[] outBuf)
{
lock (this)
{
CommandNumber++;
// ReSharper disable once CompareOfFloatsByEqualityOperator
if (StateSaveProbability != 0.0)
{
// S3 debug support
DebugStateSave();
LastStateSaveCommandNumber = CommandNumber;
}
CommandHeader commandHeader;
TpmHandle[] inHandles;
SessionIn[] inSessions;
byte[] commandParmsNoHandles;
bool legalCommand = CommandProcessor.CrackCommand(inBuf, out commandHeader, out inHandles, out inSessions, out commandParmsNoHandles);
if (!legalCommand)
{
// Is a diagnostics command. Pass through to TPM (a real RM would refuse).
TpmDevice.DispatchCommand(active, inBuf, out outBuf);
return;
}
TpmCc commandCode = commandHeader.CommandCode;
// Lookup command
CommandInfo command = Tpm2.CommandInfoFromCommandCode(commandCode);
if (command == null)
{
throw new Exception("Unrecognized command");
}
if (commandCode == TpmCc.ContextLoad || commandCode == TpmCc.ContextSave)
{
//throw new Exception("ContextLoad and ContextSave not supported in this build");
#if !NETFX_CORE
Console.Error.WriteLine("ContextLoad and ContextSave not supported in this build");
#endif
outBuf = Marshaller.GetTpmRepresentation(new Object[] {
TpmSt.NoSessions,
(uint)10,
TpmRc.NotUsed });
}
// Look up referenced objects and sessions
ObjectContext[] neededObjects = GetReferencedObjects(caller, inHandles);
ObjectContext[] neededSessions = GetSessions(caller, inSessions);
ObjectContext[] neededEntities =
neededObjects != null
? neededSessions != null
? neededObjects.Concat(neededSessions).ToArray()
: neededObjects
: neededSessions;
if (neededObjects == null || neededSessions == null)
{
// This means that one or more of the handles was not registered for the context
byte[] ret = FormatError(TpmRc.Handle);
outBuf = ret;
return;
}
// Load referenced objects and sessions (free slots if needed)
// It's important to load all object and session handles in a single call
// to LoadEntities(), as for some commands (e.g. GetSessionAuditDigest)
// the objects array may contain session handles. In this case the session
// handles loaded by the invocation of LoadEntities for neededObjects
// may be evicted again during the subsequent call for neededSessions.
bool loadOk = LoadEntities(neededEntities);
if (!loadOk)
{
throw new Exception("Failed to make space for objects or sessions at to execute command");
}
// At this point everything referenced should be loaded, and there will be a free slot if needed
// so we can translate the input handles to the underlying handles
ReplaceHandlesIn(inHandles, inSessions, neededObjects, neededSessions);
// create the translated command from the various components we have been manipulating
byte[] commandBuf = CommandProcessor.CreateCommand(commandHeader.CommandCode, inHandles, inSessions, commandParmsNoHandles);
Debug.Assert(commandBuf.Length == inBuf.Length);
byte[] responseBuf;
// Todo: Virtualize GetCapability for handle enumeration.
//
// Execute command on underlying TPM device.
// If we get an ObjectMemory or SessionMemory error we try to make more space and try again
// Note: If the TPM device throws an error above we let it propagate out. There should be no side
// effects on TPM state that the TBS cares about.
//
do
{
TpmDevice.DispatchCommand(active, commandBuf, out responseBuf);
TpmRc res = GetResultCode(responseBuf);
if (res == TpmRc.Success)
{
break;
}
var slotType = SlotType.NoSlot;
if (res == TpmRc.ObjectHandles || res == TpmRc.ObjectMemory)
{
slotType = SlotType.ObjectSlot;
}
else if (res == TpmRc.SessionHandles || res == TpmRc.SessionMemory)
{
slotType = SlotType.SessionSlot;
}
else
{
// Command failure not related to resources
break;
}
bool slotMade = MakeSpace(slotType, neededEntities);
if (!slotMade)
{
throw new Exception("Failed to make an object slot in the TPM");
}
} while (true);
// Parse the response from the TPM
// TODO: Make this use the new methods in Tpm2
// ReSharper disable once UnusedVariable
var mOut = new Marshaller(responseBuf);
TpmSt responseTag;
uint responseParamSize;
TpmRc resultCode;
TpmHandle[] responseHandles;
SessionOut[] responseSessions;
byte[] responseParmsNoHandles, responseParmsWithHandles;
CommandProcessor.SplitResponse(responseBuf,
command.HandleCountOut,
out responseTag,
out responseParamSize,
out resultCode,
out responseHandles,
out responseSessions,
out responseParmsNoHandles,
out responseParmsWithHandles);
// If we have an error there is no impact on the loaded sessions, but we update
// the LRU values because the user will likely try again.
if (resultCode != TpmRc.Success)
{
outBuf = responseBuf;
UpdateLastUseCount(new[] {neededObjects, neededSessions});
return;
}
// Update TBS database with any newly created TPM objects
ProcessUpdatedTpmState(caller, command, responseHandles, neededObjects);
// And if there were any newly created objects use the new DB entries to translate the handles
ReplaceHandlesOut(responseHandles);
byte[] translatedResponse = CommandProcessor.CreateResponse(resultCode, responseHandles, responseSessions, responseParmsNoHandles);
outBuf = translatedResponse;
Debug.Assert(outBuf.Length == responseBuf.Length);
} // lock(this)
}