| /* SPDX-License-Identifier: BSD-2 */ |
| /***********************************************************************; |
| * Copyright (c) 2015 - 2018, Intel Corporation |
| * All rights reserved. |
| ***********************************************************************/ |
| |
| #include <inttypes.h> |
| |
| #include "tss2_tpm2_types.h" |
| #include "tss2_mu.h" |
| #include "sysapi_util.h" |
| #include "util/tss2_endian.h" |
| #define LOGMODULE sys |
| #include "util/log.h" |
| |
| TSS2_RC Tss2_Sys_ExecuteAsync(TSS2_SYS_CONTEXT *sysContext) |
| { |
| _TSS2_SYS_CONTEXT_BLOB *ctx = syscontext_cast(sysContext); |
| TSS2_RC rval; |
| |
| if (!ctx) |
| return TSS2_SYS_RC_BAD_REFERENCE; |
| |
| if (ctx->previousStage != CMD_STAGE_PREPARE) |
| return TSS2_SYS_RC_BAD_SEQUENCE; |
| |
| rval = Tss2_Tcti_Transmit(ctx->tctiContext, |
| HOST_TO_BE_32(req_header_from_cxt(ctx)->commandSize), |
| ctx->cmdBuffer); |
| if (rval) |
| return rval; |
| |
| ctx->previousStage = CMD_STAGE_SEND_COMMAND; |
| |
| return rval; |
| } |
| |
| TSS2_RC Tss2_Sys_ExecuteFinish(TSS2_SYS_CONTEXT *sysContext, int32_t timeout) |
| { |
| _TSS2_SYS_CONTEXT_BLOB *ctx = syscontext_cast(sysContext); |
| TSS2_RC rval; |
| size_t responseSize = 0; |
| |
| if (!ctx) |
| return TSS2_SYS_RC_BAD_REFERENCE; |
| |
| if (ctx->previousStage != CMD_STAGE_SEND_COMMAND) |
| return TSS2_SYS_RC_BAD_SEQUENCE; |
| |
| #ifdef TCTI_PARTIAL_READ |
| /* |
| * First call receive with NULL as the response buffer to |
| * get the size of the response |
| */ |
| rval = Tss2_Tcti_Receive(ctx->tctiContext, &responseSize, |
| NULL, timeout); |
| if (rval) |
| return rval; |
| |
| if (responseSize < sizeof(TPM20_Header_Out)) { |
| ctx->previousStage = CMD_STAGE_PREPARE; |
| return TSS2_SYS_RC_INSUFFICIENT_RESPONSE; |
| } |
| if (responseSize > ctx->maxCmdSize) { |
| ctx->previousStage = CMD_STAGE_PREPARE; |
| return TSS2_SYS_RC_INSUFFICIENT_CONTEXT; |
| } |
| #else |
| /* For none partial reads set the size to maxCmdSize */ |
| responseSize = ctx->maxCmdSize; |
| #endif |
| |
| /* |
| * Then call receive again with the response buffer to read the response |
| */ |
| rval = Tss2_Tcti_Receive(ctx->tctiContext, &responseSize, |
| ctx->cmdBuffer, timeout); |
| if (rval == TSS2_TCTI_RC_INSUFFICIENT_BUFFER) |
| return TSS2_SYS_RC_INSUFFICIENT_CONTEXT; |
| |
| if (rval) |
| return rval; |
| |
| /* |
| * Unmarshal the tag, response size, and response code as soon |
| * as possible. Later processing code should get this data from |
| * the TPM20_Header_Out in the context structure. No need to |
| * unmarshal this stuff again. |
| */ |
| ctx->nextData = 0; |
| |
| rval = Tss2_MU_TPM2_ST_Unmarshal(ctx->cmdBuffer, |
| ctx->maxCmdSize, |
| &ctx->nextData, |
| &ctx->rsp_header.tag); |
| if (rval) { |
| LOG_ERROR("Unmarshaling response tag. RC=%" PRIx32, rval); |
| return rval; |
| } |
| |
| if (ctx->rsp_header.tag != TPM2_ST_SESSIONS && |
| ctx->rsp_header.tag != TPM2_ST_NO_SESSIONS) { |
| if (ctx->rsp_header.tag == TPM2_ST_RSP_COMMAND) { |
| LOG_ERROR("Unsupported device. The device is a TPM 1.2"); |
| return TSS2_SYS_RC_GENERAL_FAILURE; |
| } else { |
| LOG_ERROR("Malformed reponse: Invalid tag in response header: %" PRIx16, |
| ctx->rsp_header.tag); |
| return TSS2_SYS_RC_MALFORMED_RESPONSE; |
| } |
| } |
| |
| rval = Tss2_MU_UINT32_Unmarshal(ctx->cmdBuffer, |
| ctx->maxCmdSize, |
| &ctx->nextData, |
| &ctx->rsp_header.responseSize); |
| if (rval) |
| return rval; |
| |
| if (ctx->rsp_header.responseSize > ctx->maxCmdSize) { |
| return TSS2_SYS_RC_MALFORMED_RESPONSE; |
| } |
| |
| rval = Tss2_MU_UINT32_Unmarshal(ctx->cmdBuffer, |
| ctx->maxCmdSize, |
| &ctx->nextData, |
| &ctx->rsp_header.responseCode); |
| if (rval) |
| return rval; |
| |
| rval = ctx->rsp_header.responseCode; |
| |
| /* If we received a TPM error other than CANCELED or if we didn't |
| * receive enough response bytes, reset SAPI state machine to |
| * CMD_STAGE_PREPARE. There's nothing else we can do for current command. |
| */ |
| if (ctx->rsp_header.responseSize < sizeof(TPM20_Header_Out)) { |
| ctx->previousStage = CMD_STAGE_PREPARE; |
| return TSS2_SYS_RC_INSUFFICIENT_RESPONSE; |
| } |
| if (rval == TPM2_RC_CANCELED) { |
| ctx->previousStage = CMD_STAGE_PREPARE; |
| return rval; |
| } |
| |
| ctx->previousStage = CMD_STAGE_RECEIVE_RESPONSE; |
| return rval; |
| } |
| |
| TSS2_RC Tss2_Sys_Execute(TSS2_SYS_CONTEXT *sysContext) |
| { |
| TSS2_RC rval; |
| |
| if (!sysContext) |
| return TSS2_SYS_RC_BAD_REFERENCE; |
| |
| rval = Tss2_Sys_ExecuteAsync(sysContext); |
| if (rval) |
| return rval; |
| |
| return Tss2_Sys_ExecuteFinish(sysContext, TSS2_TCTI_TIMEOUT_BLOCK); |
| } |