| /* SPDX-License-Identifier: BSD-2-Clause */ |
| /******************************************************************************* |
| * Copyright 2018-2019, Fraunhofer SIT sponsored by Infineon Technologies AG |
| * All rights reserved. |
| ******************************************************************************/ |
| |
| #ifdef HAVE_CONFIG_H |
| #include <config.h> |
| #endif |
| |
| #include "tss2_fapi.h" |
| #include "fapi_int.h" |
| #include "fapi_util.h" |
| #include "tss2_esys.h" |
| #include "ifapi_json_serialize.h" |
| #include "fapi_crypto.h" |
| #define LOGMODULE fapi |
| #include "util/log.h" |
| #include "util/aux_util.h" |
| |
| /** One-Call function for Fapi_PcrExtend |
| * |
| * Performs an extend operation on a given PCR. |
| * |
| * @param[in,out] context The FAPI_CONTEXT |
| * @param[in] pcr The PCR to extend |
| * @param[in] data The data that is to be extended on the PCR |
| * @param[in] dataSize The size of data in bytes |
| * @param[in] logData A JSON representation of data to be written to the PCR's |
| * event log. May be NULL |
| * |
| * @retval TSS2_RC_SUCCESS: if the function call was a success. |
| * @retval TSS2_FAPI_RC_BAD_REFERENCE: if context or data is NULL. |
| * @retval TSS2_FAPI_RC_BAD_CONTEXT: if context corruption is detected. |
| * @retval TSS2_FAPI_RC_NO_PCR: if no such PCR exists on this TPM. |
| * @retval TSS2_FAPI_RC_BAD_SEQUENCE: if the context has an asynchronous |
| * operation already pending. |
| * @retval TSS2_FAPI_RC_IO_ERROR: if the data cannot be saved. |
| * @retval TSS2_FAPI_RC_MEMORY: if the FAPI cannot allocate enough memory for |
| * internal operations or return parameters. |
| * @retval TSS2_FAPI_RC_NO_TPM if FAPI was initialized in no-TPM-mode via its |
| * config file. |
| * @retval TSS2_FAPI_RC_BAD_VALUE if an invalid value was passed into |
| * the function. |
| * @retval TSS2_FAPI_RC_TRY_AGAIN if an I/O operation is not finished yet and |
| * this function needs to be called again. |
| * @retval TSS2_FAPI_RC_PATH_NOT_FOUND if a FAPI object path was not found |
| * during authorization. |
| * @retval TSS2_FAPI_RC_KEY_NOT_FOUND if a key was not found. |
| * @retval TSS2_FAPI_RC_GENERAL_FAILURE if an internal error occurred. |
| * @retval TSS2_FAPI_RC_AUTHORIZATION_UNKNOWN if a required authorization callback |
| * is not set. |
| * @retval TSS2_FAPI_RC_AUTHORIZATION_FAILED if the authorization attempt fails. |
| * @retval TSS2_FAPI_RC_POLICY_UNKNOWN if policy search for a certain policy digest |
| * was not successful. |
| * @retval TSS2_ESYS_RC_* possible error codes of ESAPI. |
| * @retval TSS2_FAPI_RC_NOT_PROVISIONED FAPI was not provisioned. |
| * @retval TSS2_FAPI_RC_BAD_PATH if the path is used in inappropriate context |
| * or contains illegal characters. |
| */ |
| TSS2_RC |
| Fapi_PcrExtend( |
| FAPI_CONTEXT *context, |
| uint32_t pcr, |
| uint8_t const *data, |
| size_t dataSize, |
| char const *logData) |
| { |
| LOG_TRACE("called for context:%p", context); |
| |
| TSS2_RC r, r2; |
| |
| /* Check for NULL parameters */ |
| check_not_null(context); |
| check_not_null(data); |
| |
| /* Check whether TCTI and ESYS are initialized */ |
| return_if_null(context->esys, "Command can't be executed in none TPM mode.", |
| TSS2_FAPI_RC_NO_TPM); |
| |
| /* If the async state automata of FAPI shall be tested, then we must not set |
| the timeouts of ESYS to blocking mode. |
| During testing, the mssim tcti will ensure multiple re-invocations. |
| Usually however the synchronous invocations of FAPI shall instruct ESYS |
| to block until a result is available. */ |
| #ifndef TEST_FAPI_ASYNC |
| r = Esys_SetTimeout(context->esys, TSS2_TCTI_TIMEOUT_BLOCK); |
| return_if_error_reset_state(r, "Set Timeout to blocking"); |
| #endif /* TEST_FAPI_ASYNC */ |
| |
| r = Fapi_PcrExtend_Async(context, pcr, data, dataSize, logData); |
| return_if_error_reset_state(r, "PcrExtend"); |
| |
| do { |
| /* We wait for file I/O to be ready if the FAPI state automata |
| are in a file I/O state. */ |
| r = ifapi_io_poll(&context->io); |
| return_if_error(r, "Something went wrong with IO polling"); |
| |
| /* Repeatedly call the finish function, until FAPI has transitioned |
| through all execution stages / states of this invocation. */ |
| r = Fapi_PcrExtend_Finish(context); |
| } while (base_rc(r) == TSS2_BASE_RC_TRY_AGAIN); |
| |
| /* Reset the ESYS timeout to non-blocking, immediate response. */ |
| r2 = Esys_SetTimeout(context->esys, 0); |
| return_if_error(r2, "Set Timeout to non-blocking"); |
| |
| return_if_error_reset_state(r, "PcrExtend"); |
| |
| LOG_TRACE("finished"); |
| return TSS2_RC_SUCCESS; |
| } |
| |
| /** Asynchronous function for Fapi_PcrExtend |
| * |
| * Performs an extend operation on a given PCR. |
| * |
| * Call Fapi_PcrExtend_Finish to finish the execution of this command. |
| * |
| * @param[in,out] context The FAPI_CONTEXT |
| * @param[in] pcr The PCR to extend |
| * @param[in] data The data that is to be extended on the PCR |
| * @param[in] dataSize The size of data in bytes |
| * @param[in] logData A JSON representation of data to be written to the PCR's |
| * event log. May be NULL |
| * |
| * @retval TSS2_RC_SUCCESS: if the function call was a success. |
| * @retval TSS2_FAPI_RC_BAD_REFERENCE: if context or data is NULL. |
| * @retval TSS2_FAPI_RC_BAD_CONTEXT: if context corruption is detected. |
| * @retval TSS2_FAPI_RC_NO_PCR: if no such PCR exists on this TPM. |
| * @retval TSS2_FAPI_RC_BAD_SEQUENCE: if the context has an asynchronous |
| * operation already pending. |
| * @retval TSS2_FAPI_RC_IO_ERROR: if the data cannot be saved. |
| * @retval TSS2_FAPI_RC_MEMORY: if the FAPI cannot allocate enough memory for |
| * internal operations or return parameters. |
| * @retval TSS2_FAPI_RC_BAD_VALUE if an invalid value was passed into |
| * the function. |
| * @retval TSS2_FAPI_RC_NO_TPM if FAPI was initialized in no-TPM-mode via its |
| * config file. |
| * @retval TSS2_ESYS_RC_* possible error codes of ESAPI. |
| */ |
| TSS2_RC |
| Fapi_PcrExtend_Async( |
| FAPI_CONTEXT *context, |
| uint32_t pcr, |
| uint8_t const *data, |
| size_t dataSize, |
| char const *logData) |
| { |
| LOG_TRACE("called for context:%p", context); |
| LOG_TRACE("pcr: %u", pcr); |
| if (data) { |
| LOGBLOB_TRACE(data, dataSize, "data"); |
| } else { |
| LOG_TRACE("data: (null) dataSize: %zi", dataSize); |
| } |
| LOG_TRACE("logData: %s", logData); |
| |
| TSS2_RC r; |
| |
| /* Check for NULL parameters */ |
| check_not_null(context); |
| check_not_null(data); |
| |
| /* Helpful alias pointers */ |
| IFAPI_PCR * command = &context->cmd.pcr; |
| |
| /* Reset all context-internal session state information. */ |
| r = ifapi_session_init(context); |
| goto_if_error(r, "Initialize PcrExtend", error_cleanup); |
| |
| /* Perform some sanity checks on the input. */ |
| if (dataSize > 1024 || dataSize == 0) { |
| goto_error(r, TSS2_FAPI_RC_BAD_VALUE, |
| "Event size must be > 1024 and != 0", error_cleanup); |
| } |
| |
| /* Copy parameters to context for use during _Finish. */ |
| strdup_check(command->logData, logData, r, error_cleanup); |
| command->event.size = dataSize; |
| memcpy(&command->event.buffer[0], data, dataSize); |
| command->pcrIndex = pcr; |
| |
| r = Esys_GetCapability_Async(context->esys, |
| ESYS_TR_NONE, ESYS_TR_NONE, ESYS_TR_NONE, |
| TPM2_CAP_PCRS, 0, 1); |
| goto_if_error(r, "Esys_GetCapability_Async", error_cleanup); |
| |
| /* Initialize the context state for this operation. */ |
| context->state = PCR_EXTEND_WAIT_FOR_GET_CAP; |
| LOG_TRACE("finished"); |
| return TSS2_RC_SUCCESS; |
| |
| error_cleanup: |
| /* Cleanup duplicated input parameters that were copied before. */ |
| SAFE_FREE(command->logData); |
| return r; |
| } |
| |
| /** Asynchronous finish function for Fapi_PcrExtend |
| * |
| * This function should be called after a previous Fapi_PcrExtend_Async. |
| * |
| * @param[in,out] context The FAPI_CONTEXT |
| * |
| * @retval TSS2_RC_SUCCESS: if the function call was a success. |
| * @retval TSS2_FAPI_RC_BAD_REFERENCE: if context is NULL. |
| * @retval TSS2_FAPI_RC_BAD_CONTEXT: if context corruption is detected. |
| * @retval TSS2_FAPI_RC_BAD_SEQUENCE: if the context has an asynchronous |
| * operation already pending. |
| * @retval TSS2_FAPI_RC_IO_ERROR: if the data cannot be saved. |
| * @retval TSS2_FAPI_RC_MEMORY: if the FAPI cannot allocate enough memory for |
| * internal operations or return parameters. |
| * @retval TSS2_FAPI_RC_TRY_AGAIN: if the asynchronous operation is not yet |
| * complete. Call this function again later. |
| * @retval TSS2_FAPI_RC_PATH_NOT_FOUND if a FAPI object path was not found |
| * during authorization. |
| * @retval TSS2_FAPI_RC_KEY_NOT_FOUND if a key was not found. |
| * @retval TSS2_FAPI_RC_BAD_VALUE if an invalid value was passed into |
| * the function. |
| * @retval TSS2_FAPI_RC_GENERAL_FAILURE if an internal error occurred. |
| * @retval TSS2_FAPI_RC_AUTHORIZATION_UNKNOWN if a required authorization callback |
| * is not set. |
| * @retval TSS2_FAPI_RC_AUTHORIZATION_FAILED if the authorization attempt fails. |
| * @retval TSS2_FAPI_RC_POLICY_UNKNOWN if policy search for a certain policy digest |
| * was not successful. |
| * @retval TSS2_ESYS_RC_* possible error codes of ESAPI. |
| * @retval TSS2_FAPI_RC_NOT_PROVISIONED FAPI was not provisioned. |
| * @retval TSS2_FAPI_RC_BAD_PATH if the path is used in inappropriate context |
| * or contains illegal characters. |
| */ |
| TSS2_RC |
| Fapi_PcrExtend_Finish( |
| FAPI_CONTEXT *context) |
| { |
| LOG_TRACE("called for context:%p", context); |
| |
| TSS2_RC r; |
| TPMI_YES_NO moreData; |
| |
| /* Check for NULL parameters */ |
| check_not_null(context); |
| |
| /* Helpful alias pointers */ |
| IFAPI_PCR * command = &context->cmd.pcr; |
| TPMS_CAPABILITY_DATA **capabilityData = &command->capabilityData; |
| IFAPI_EVENT * pcrEvent = &command->pcr_event; |
| IFAPI_TSS_EVENT * subEvent = &pcrEvent->sub_event.tss_event; |
| |
| switch (context->state) { |
| statecase(context->state, PCR_EXTEND_WAIT_FOR_GET_CAP); |
| command->event_log_file = NULL; |
| r = Esys_GetCapability_Finish(context->esys, &moreData, capabilityData); |
| return_try_again(r); |
| goto_if_error_reset_state(r, "GetCapablity_Finish", error_cleanup); |
| |
| /* Construct the filename for the eventlog file */ |
| r = ifapi_asprintf(&command->event_log_file, "%s/%s%i", |
| context->eventlog.log_dir, IFAPI_PCR_LOG_FILE, command->pcrIndex); |
| return_if_error(r, "Out of memory."); |
| |
| /* Check wheter the event log has to be read. */ |
| if (ifapi_io_path_exists(command->event_log_file)) { |
| r = ifapi_io_read_async(&context->io, command->event_log_file); |
| goto_if_error_reset_state(r, "Read event log", error_cleanup); |
| context->eventlog.state = IFAPI_EVENTLOG_STATE_READING; |
| } else { |
| context->eventlog.state = IFAPI_EVENTLOG_STATE_APPENDING; |
| SAFE_FREE(command->event_log_file); |
| } |
| |
| fallthrough; |
| |
| statecase(context->state,PCR_EXTEND_READ_EVENT_LOG); |
| /* Check whether log file contains valid json. */ |
| r = ifapi_eventlog_append_check(&context->eventlog, &context->io); |
| return_try_again(r); |
| goto_if_error(r, "ifapi_eventlog_append_check", error_cleanup); |
| |
| /* Prepare session used for integrity protecting the PCR Event operation. */ |
| r = ifapi_get_sessions_async(context, |
| IFAPI_SESSION_GENEK | IFAPI_SESSION1, |
| 0, 0); |
| goto_if_error_reset_state(r, "Create sessions", error_cleanup); |
| |
| fallthrough; |
| |
| statecase(context->state, PCR_EXTEND_WAIT_FOR_SESSION); |
| r = ifapi_get_sessions_finish(context, &context->profiles.default_profile, |
| context->profiles.default_profile.nameAlg); |
| return_try_again(r); |
| goto_if_error_reset_state(r, " FAPI create session", error_cleanup); |
| |
| /* Call PCR Event on the TPM, which performs an extend to all banks. */ |
| r = Esys_PCR_Event_Async(context->esys, command->pcrIndex, |
| context->session1, ESYS_TR_NONE, ESYS_TR_NONE, |
| &command->event); |
| return_if_error(r, "Esys_PCR_Event_Async"); |
| command->event_digests = NULL; |
| |
| fallthrough; |
| |
| statecase(context->state, PCR_EXTEND_FINISH); |
| r = Esys_PCR_Event_Finish(context->esys, &command->event_digests); |
| return_try_again(r); |
| goto_if_error_reset_state(r, "PCR_Extend_Finish", error_cleanup); |
| |
| /* Construct the eventLog entry. */ |
| pcrEvent->digests = *command->event_digests; |
| pcrEvent->pcr = command->pcrIndex; |
| pcrEvent->type = IFAPI_TSS_EVENT_TAG; |
| subEvent->data = command->event; |
| if (command->logData) { |
| strdup_check(subEvent->event, |
| command->logData, r, error_cleanup); |
| } else { |
| subEvent->event = NULL; |
| } |
| fallthrough; |
| |
| statecase(context->state, PCR_EXTEND_APPEND_EVENT_LOG); |
| r = ifapi_eventlog_append_finish(&context->eventlog, &context->io, |
| &command->pcr_event); |
| return_try_again(r); |
| goto_if_error(r, "ifapi_eventlog_append_finish", error_cleanup); |
| |
| SAFE_FREE(command->event_digests); |
| fallthrough; |
| |
| statecase(context->state, PCR_EXTEND_CLEANUP) |
| /* Cleanup the session used for integrity checking. */ |
| r = ifapi_cleanup_session(context); |
| try_again_or_error_goto(r, "Cleanup", error_cleanup); |
| |
| context->state = _FAPI_STATE_INIT; |
| break; |
| |
| statecasedefault(context->state); |
| } |
| |
| error_cleanup: |
| /* Cleanup any intermediate results and state stored in the context. */ |
| SAFE_FREE(command->event_log_file); |
| SAFE_FREE(*capabilityData); |
| SAFE_FREE(command->event_digests); |
| SAFE_FREE(command->logData); |
| ifapi_cleanup_ifapi_object(&context->loadKey.auth_object); |
| ifapi_cleanup_ifapi_object(context->loadKey.key_object); |
| ifapi_cleanup_ifapi_object(&context->createPrimary.pkey_object); |
| ifapi_cleanup_event(pcrEvent); |
| ifapi_session_clean(context); |
| LOG_TRACE("finished"); |
| return r; |
| } |