| //**********************************************************************; |
| // Copyright (c) 2015, Intel Corporation |
| // All rights reserved. |
| // |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are met: |
| // |
| // 1. Redistributions of source code must retain the above copyright notice, |
| // this list of conditions and the following disclaimer. |
| // |
| // 2. Redistributions in binary form must reproduce the above copyright notice, |
| // this list of conditions and the following disclaimer in the documentation |
| // and/or other materials provided with the distribution. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| // AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| // ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE |
| // LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| // CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| // SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| // INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| // CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| // ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF |
| // THE POSSIBILITY OF SUCH DAMAGE. |
| //**********************************************************************; |
| |
| #include "sapi/tpm20.h" |
| #include "sysapi_util.h" |
| #include "tss2_endian.h" |
| |
| void InitSysContextFields(TSS2_SYS_CONTEXT *sysContext) |
| { |
| SYS_CONTEXT->tpmVersionInfoValid = 0; |
| SYS_CONTEXT->decryptAllowed = 0; |
| SYS_CONTEXT->encryptAllowed = 0; |
| SYS_CONTEXT->decryptNull = 0; |
| SYS_CONTEXT->authAllowed = 0; |
| SYS_CONTEXT->decryptSession = 0; |
| SYS_CONTEXT->encryptSession = 0; |
| SYS_CONTEXT->prepareCalledFromOneCall = 0; |
| SYS_CONTEXT->completeCalledFromOneCall = 0; |
| SYS_CONTEXT->nextData = 0; |
| SYS_CONTEXT->rpBufferUsedSize = 0; |
| SYS_CONTEXT->rval = TSS2_RC_SUCCESS; |
| } |
| |
| /* |
| * Initialize pointers to the various memory blocks / buffers in the opaque |
| * area of the TSS2_SYS_CONTEXT structure. |
| * |
| * tpmInBufferPtr: pointer to the memory area where we build command buffers |
| * that we send to the TPM |
| * tpmOutBufferPtrs: pointer to the memory area where we store the TPMs |
| * response |
| * maxComamndSize / maxResponseSize: the size of these memory areas. |
| * |
| * NOTE: It should only be necessary to invoke this function once for any |
| * given sys context. |
| */ |
| void InitSysContextPtrs( |
| TSS2_SYS_CONTEXT *sysContext, |
| size_t contextSize) |
| { |
| SYS_CONTEXT->tpmInBuffPtr = (UINT8 *)SYS_CONTEXT + sizeof(_TSS2_SYS_CONTEXT_BLOB); |
| SYS_CONTEXT->tpmOutBuffPtr = SYS_CONTEXT->tpmInBuffPtr; |
| SYS_CONTEXT->maxCommandSize = contextSize - sizeof(_TSS2_SYS_CONTEXT_BLOB); |
| SYS_CONTEXT->maxResponseSize = SYS_CONTEXT->maxCommandSize; |
| } |
| |
| UINT32 GetCommandSize(TSS2_SYS_CONTEXT *sysContext) |
| { |
| return BE_TO_HOST_32(SYS_REQ_HEADER->commandSize); |
| } |
| |
| TPM_RC CopyCommandHeader(TSS2_SYS_CONTEXT *sysContext, TPM_CC commandCode) |
| { |
| TPM_RC rval; |
| |
| if (!sysContext) |
| return TSS2_SYS_RC_BAD_REFERENCE; |
| |
| SYS_CONTEXT->nextData = 0; |
| SYS_CONTEXT->rval = TSS2_RC_SUCCESS; |
| |
| rval = Tss2_MU_TPM_ST_Marshal(TPM_ST_NO_SESSIONS, SYS_CONTEXT->tpmInBuffPtr, |
| SYS_CONTEXT->maxCommandSize, |
| &SYS_CONTEXT->nextData); |
| if (rval) |
| return rval; |
| |
| SYS_REQ_HEADER->commandCode = HOST_TO_BE_32(commandCode); |
| SYS_CONTEXT->nextData = sizeof(TPM20_Header_In); |
| return rval; |
| } |
| |
| TSS2_RC CommonPreparePrologue( |
| TSS2_SYS_CONTEXT *sysContext, |
| TPM_CC commandCode) |
| { |
| int numCommandHandles; |
| TPM_RC rval; |
| |
| if (!sysContext) |
| return TSS2_SYS_RC_BAD_REFERENCE; |
| |
| InitSysContextFields(sysContext); |
| |
| /* Need to check stage here. */ |
| if (SYS_CONTEXT->previousStage != CMD_STAGE_INITIALIZE && |
| SYS_CONTEXT->previousStage != CMD_STAGE_RECEIVE_RESPONSE && |
| SYS_CONTEXT->previousStage != CMD_STAGE_PREPARE) |
| return TSS2_SYS_RC_BAD_SEQUENCE; |
| |
| rval = CopyCommandHeader(sysContext, commandCode); |
| if (rval) |
| return rval; |
| |
| SYS_CONTEXT->numResponseHandles = GetNumResponseHandles(commandCode); |
| SYS_CONTEXT->commandCodeSwapped = HOST_TO_BE_32(commandCode); |
| SYS_CONTEXT->rspParamsSize = (UINT32 *)(SYS_CONTEXT->tpmOutBuffPtr + |
| sizeof(TPM20_Header_Out) + |
| (GetNumResponseHandles(commandCode) * sizeof(UINT32))); |
| |
| numCommandHandles = GetNumCommandHandles(commandCode); |
| SYS_CONTEXT->cpBuffer = SYS_CONTEXT->tpmInBuffPtr + |
| SYS_CONTEXT->nextData + |
| (numCommandHandles * sizeof(UINT32)); |
| return rval; |
| } |
| |
| TSS2_RC CommonPrepareEpilogue(TSS2_SYS_CONTEXT *sysContext) |
| { |
| SYS_CONTEXT->cpBufferUsedSize = (SYS_CONTEXT->tpmInBuffPtr + SYS_CONTEXT->nextData) - |
| SYS_CONTEXT->cpBuffer; |
| SYS_REQ_HEADER->commandSize = HOST_TO_BE_32(SYS_CONTEXT->nextData); |
| SYS_CONTEXT->previousStage = CMD_STAGE_PREPARE; |
| |
| return TSS2_RC_SUCCESS; |
| } |
| |
| TSS2_RC CommonComplete(TSS2_SYS_CONTEXT *sysContext) |
| { |
| UINT32 rspSize; |
| TPM_ST tag; |
| size_t next = 0; |
| TPM_RC rval; |
| |
| if (!sysContext) |
| return TSS2_SYS_RC_BAD_REFERENCE; |
| |
| rspSize = BE_TO_HOST_32(SYS_RESP_HEADER->responseSize); |
| |
| if(rspSize > SYS_CONTEXT->maxResponseSize) { |
| SYS_CONTEXT->rval = TSS2_SYS_RC_MALFORMED_RESPONSE; |
| return TSS2_SYS_RC_MALFORMED_RESPONSE; |
| } |
| |
| /* |
| * NOTE: should this depend on the status of previous |
| * API call? i.e. SYS_CONTEXT->rval != TSS2_RC_SUCCESS |
| */ |
| if (SYS_CONTEXT->previousStage != CMD_STAGE_RECEIVE_RESPONSE || |
| SYS_CONTEXT->rval != TSS2_RC_SUCCESS) |
| return TSS2_SYS_RC_BAD_SEQUENCE; |
| |
| SYS_CONTEXT->nextData = (UINT8 *)SYS_CONTEXT->rspParamsSize - |
| SYS_CONTEXT->tpmOutBuffPtr; |
| |
| rval = Tss2_MU_TPM_ST_Unmarshal(SYS_CONTEXT->tpmOutBuffPtr, |
| SYS_CONTEXT->maxResponseSize, |
| &next, &tag); |
| if (rval) |
| return rval; |
| |
| /* Save response params size */ |
| if (tag == TPM_ST_SESSIONS) { |
| rval = Tss2_MU_UINT32_Unmarshal(SYS_CONTEXT->tpmOutBuffPtr, |
| SYS_CONTEXT->maxResponseSize, |
| &SYS_CONTEXT->nextData, |
| &SYS_CONTEXT->rpBufferUsedSize); |
| if (rval) |
| return rval; |
| } |
| |
| SYS_CONTEXT->rpBuffer = SYS_CONTEXT->tpmOutBuffPtr + SYS_CONTEXT->nextData; |
| |
| if (tag != TPM_ST_SESSIONS) { |
| SYS_CONTEXT->rpBufferUsedSize = rspSize - |
| (SYS_CONTEXT->rpBuffer - SYS_CONTEXT->tpmOutBuffPtr); |
| } |
| |
| return rval; |
| } |
| |
| TSS2_RC CommonOneCall( |
| TSS2_SYS_CONTEXT *sysContext, |
| TSS2_SYS_CMD_AUTHS const *cmdAuthsArray, |
| TSS2_SYS_RSP_AUTHS *rspAuthsArray) |
| { |
| TSS2_RC rval; |
| |
| if( SYS_CONTEXT->rval != TSS2_RC_SUCCESS ) |
| return SYS_CONTEXT->rval; |
| |
| if (cmdAuthsArray) { |
| rval = Tss2_Sys_SetCmdAuths(sysContext, cmdAuthsArray); |
| if (rval) |
| return rval; |
| } |
| |
| rval = Tss2_Sys_Execute(sysContext); |
| if (rval) |
| return rval; |
| |
| if (SYS_CONTEXT->rsp_header.responseCode) |
| return SYS_CONTEXT->rsp_header.responseCode; |
| |
| if (BE_TO_HOST_16(SYS_RESP_HEADER->tag) == TPM_ST_SESSIONS && rspAuthsArray) |
| rval = Tss2_Sys_GetRspAuths(sysContext, rspAuthsArray); |
| |
| return rval; |
| } |
| |
| TSS2_RC CommonOneCallForNoResponseCmds( |
| TSS2_SYS_CONTEXT *sysContext, |
| TSS2_SYS_CMD_AUTHS const *cmdAuthsArray, |
| TSS2_SYS_RSP_AUTHS *rspAuthsArray) |
| { |
| TSS2_RC rval; |
| |
| rval = CommonOneCall(sysContext, cmdAuthsArray, rspAuthsArray); |
| if(rval) |
| return rval; |
| |
| return CommonComplete(sysContext); |
| } |
