public override TPMCommandResponse Process()
{
TPMBlob requestBlob = new TPMBlob();
requestBlob.WriteCmdHeader(TPMCmdTags.TPM_TAG_RQU_COMMAND, TPMOrdinals.TPM_ORD_OIAP);
requestBlob.WriteCmdSize();
_commandAuthHelper.EnsureFreeSlot();
TPMBlob responseBlob = TransmitMe(requestBlob);
responseBlob.SkipHeader();
AuthHandleCore authHandle = new AuthHandleCore(AuthHandle.AuthType.OIAP, responseBlob);
_responseParameters = new Parameters();
_responseParameters.AddValue("auth_handle", authHandle);
return new TPMCommandResponse(true, TPMCommandNames.TPM_CMD_OIAP, _responseParameters);
}
public override TPMCommandResponse Process()
{
TPMEntityTypeLSB entityLSB = _params.GetValueOf<TPMEntityTypeLSB>("entity_lsb");
TPMEntityTypeMSB entityMSB = _params.GetValueOf<TPMEntityTypeMSB>("entity_msb");
string identifier = _params.GetValueOf<string>("entity_value");
if( entityLSB != TPMEntityTypeLSB.TPM_ET_KEYHANDLE &&
entityLSB != TPMEntityTypeLSB.TPM_ET_SRK &&
entityLSB != TPMEntityTypeLSB.TPM_ET_OWNER)
{
throw new ArgumentException("TPM_OSAP does currently not support entityType: " + entityLSB.ToString());
}
if(entityMSB != TPMEntityTypeMSB.TPM_ET_XOR)
{
throw new ArgumentException(string.Format("TPM_OSAP does currently not support '{0}' EncAuth encryption", entityMSB));
}
if(entityLSB == TPMEntityTypeLSB.TPM_ET_KEYHANDLE ||
entityLSB == TPMEntityTypeLSB.TPM_ET_SRK)
{
//We now know that the current identifier is a key identifier (maybe srk, but then the value is ignored by TPM_OSAP).
//So we invoke the key manager to load the key with the specified identifier and establish an OSAP session
_keyManager.LoadKey(identifier);
}
//handle is not known yet
AuthHandle authHandle = new AuthHandle(AuthHandle.AuthType.OSAP, 0);
authHandle.EntityType = entityLSB;
authHandle.NewNonceOddOSAP();
using(_keyManager.AcquireLock())
{
TPMBlob requestBlob = new TPMBlob();
requestBlob.WriteCmdHeader(TPMCmdTags.TPM_TAG_RQU_COMMAND, TPMOrdinals.TPM_ORD_OSAP);
requestBlob.WriteUInt16((ushort)(((ushort)entityMSB << 8) | (ushort)entityLSB));
if(entityLSB == TPMEntityTypeLSB.TPM_ET_KEYHANDLE ||
entityLSB == TPMEntityTypeLSB.TPM_ET_SRK)
{
if (identifier == KeyHandle.KEY_SRK)
{
requestBlob.WriteUInt32((uint)TPMKeyHandles.TPM_KH_SRK);
authHandle.EntityValue = (uint)TPMKeyHandles.TPM_KH_SRK;
}
else
{
KeyHandle keyHandle = _keyManager.IdentifierToHandle(identifier);
requestBlob.WriteUInt32(keyHandle.Handle);
authHandle.EntityValue = keyHandle.Handle;
}
}
else if(entityLSB == TPMEntityTypeLSB.TPM_ET_OWNER)
{
requestBlob.WriteUInt32((uint)TPMKeyHandles.TPM_KH_OWNER);
authHandle.EntityValue = (uint)TPMKeyHandles.TPM_KH_OWNER;
}
requestBlob.Write(authHandle.NonceOddOSAP, 0, authHandle.NonceOddOSAP.Length);
requestBlob.WriteCmdSize();
_commandAuthHelper.EnsureFreeSlot();
_responseBlob = TransmitMe(requestBlob);
}
_responseBlob.SkipHeader();
AuthHandleCore receivedAuthHandle = new AuthHandleCore(AuthHandle.AuthType.OSAP, _responseBlob);
authHandle.UpdateFromOtherAuthHandle(receivedAuthHandle);
_responseParameters = new Parameters();
_responseParameters.AddValue("auth_handle", authHandle);
return new TPMCommandResponse(true, TPMCommandNames.TPM_CMD_OSAP, _responseParameters);
}
