blob: d64b944e3e27c0468af3c960e6ae57df238f2e00 [file] [log] [blame]
/* 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_mu.h"
#include "tss2_fapi.h"
#include "fapi_int.h"
#include "fapi_util.h"
#include "tss2_esys.h"
#include "fapi_policy.h"
#include "fapi_crypto.h"
#define LOGMODULE fapi
#include "util/log.h"
#include "util/aux_util.h"
/** One-Call function for Fapi_WriteAuthorizeNv
*
* Write the policyDigest of a policy to an NV index so it can be used in policies
* containing PolicyAuthorizeNV elements.
*
* @param[in,out] context The FAPI_CONTEXT
* @param[in] nvPath The path of the NV index
* @param[in] policyPath The path of the new policy
*
* @retval TSS2_RC_SUCCESS: if the function call was a success.
* @retval TSS2_FAPI_RC_BAD_REFERENCE: if context or path is NULL.
* @retval TSS2_FAPI_RC_BAD_CONTEXT: if context corruption is detected.
* @retval TSS2_FAPI_RC_BAD_PATH: if nvPath or policyPath does not map to a
* FAPI policy or NV index.
* @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_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_TRY_AGAIN if an I/O operation is not finished yet and
* this function needs to be called again.
* @retval TSS2_FAPI_RC_GENERAL_FAILURE if an internal error occurred.
* @retval TSS2_ESYS_RC_* possible error codes of ESAPI.
* @retval TSS2_FAPI_RC_NOT_PROVISIONED FAPI was not provisioned.
* @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.
*/
TSS2_RC
Fapi_WriteAuthorizeNv(
FAPI_CONTEXT *context,
char const *nvPath,
char const *policyPath)
{
LOG_TRACE("called for context:%p", context);
TSS2_RC r, r2;
/* Check for NULL parameters */
check_not_null(context);
check_not_null(nvPath);
check_not_null(policyPath);
/* 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_WriteAuthorizeNv_Async(context, nvPath, policyPath);
return_if_error_reset_state(r, "WriteAuthorizeNV");
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_WriteAuthorizeNv_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, "WriteAuthorizeNV");
LOG_TRACE("finished");
return TSS2_RC_SUCCESS;
}
/** Asynchronous function for Fapi_WriteAuthorizeNv
*
* Write the policyDigest of a policy to an NV index so it can be used in policies
* containing PolicyAuthorizeNV elements.
*
* Call Fapi_WriteAuthorizeNv_Finish to finish the execution of this command.
*
* @param[in,out] context The FAPI_CONTEXT
* @param[in] nvPath The path of the NV index
* @param[in] policyPath The path of the new policy
*
* @retval TSS2_RC_SUCCESS: if the function call was a success.
* @retval TSS2_FAPI_RC_BAD_REFERENCE: if context or path is NULL.
* @retval TSS2_FAPI_RC_BAD_CONTEXT: if context corruption is detected.
* @retval TSS2_FAPI_RC_BAD_PATH: if nvPath or policyPath does not map to a
* FAPI policy or NV index.
* @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_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_NOT_PROVISIONED FAPI was not provisioned.
*/
TSS2_RC
Fapi_WriteAuthorizeNv_Async(
FAPI_CONTEXT *context,
char const *nvPath,
char const *policyPath)
{
LOG_TRACE("called for context:%p", context);
LOG_TRACE("nvPath: %s", nvPath);
LOG_TRACE("policyPath: %s", policyPath);
TSS2_RC r;
/* Check for NULL parameters */
check_not_null(context);
check_not_null(nvPath);
check_not_null(policyPath);
/* Helpful alias pointers */
IFAPI_api_WriteAuthorizeNv * command = &context->cmd.WriteAuthorizeNV;
IFAPI_NV_Cmds * nvCmd = &context->nv_cmd;
/* Reset all context-internal session state information. */
r = ifapi_session_init(context);
return_if_error(r, "Initialize WriterAuthorizeNv");
/* Copy parameters to context for use during _Finish. */
strdup_check(command->policyPath, policyPath, r, error_cleanup);
strdup_check(nvCmd->nvPath, nvPath, r, error_cleanup);
/* Load the metadata for the NV index to be written to from the keystore. */
r = ifapi_keystore_load_async(&context->keystore, &context->io, nvCmd->nvPath);
goto_if_error2(r, "Could not open: %s", error_cleanup, nvCmd->nvPath);
/* Initialize the context state for this operation. */
context->state = WRITE_AUTHORIZE_NV_READ_NV;
LOG_TRACE("finished");
return TSS2_RC_SUCCESS;
error_cleanup:
/* Cleanup duplicated input parameters that were copied before. */
SAFE_FREE(command->policyPath);
SAFE_FREE(nvCmd->nvPath);
return r;
}
/** Asynchronous finish function for Fapi_WriteAuthorizeNv
*
* This function should be called after a previous Fapi_WriteAuthorizeNv_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_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_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_ESYS_RC_* possible error codes of ESAPI.
* @retval TSS2_FAPI_RC_BAD_PATH if the path is used in inappropriate context
* or contains illegal characters.
* @retval TSS2_FAPI_RC_NOT_PROVISIONED FAPI was not provisioned.
* @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.
*/
TSS2_RC
Fapi_WriteAuthorizeNv_Finish(
FAPI_CONTEXT *context)
{
LOG_TRACE("called for context:%p", context);
TSS2_RC r;
const size_t maxNvSize = sizeof(TPMU_HA) + sizeof(TPMI_ALG_HASH);
BYTE nvBuffer[maxNvSize];
size_t offset = 0;
/* Check for NULL parameters */
check_not_null(context);
/* Helpful alias pointers */
IFAPI_api_WriteAuthorizeNv * command = &context->cmd.WriteAuthorizeNV;
IFAPI_NV_Cmds * nvCmd = &context->nv_cmd;
IFAPI_OBJECT *object = &nvCmd->nv_object;
TPMI_ALG_HASH hashAlg;
TPMS_POLICY * policy = &context->policy.policy;
switch (context->state) {
statecase(context->state, WRITE_AUTHORIZE_NV_READ_NV)
/* First check whether the file in object store can be updated. */
r = ifapi_keystore_check_writeable(&context->keystore, &context->io,
nvCmd->nvPath);
goto_if_error_reset_state(r,
"Check whether update object store is possible.", error_cleanup);
r = ifapi_keystore_load_finish(&context->keystore, &context->io, object);
return_try_again(r);
return_if_error_reset_state(r, "read_finish failed");
ifapi_cleanup_ifapi_object(object);
/* Initialize the NV index object to be used with esys. */
r = ifapi_initialize_object(context->esys, object);
goto_if_error_reset_state(r, "Initialize NV object", error_cleanup);
fallthrough;
statecase(context->state, WRITE_AUTHORIZE_NV_CALCULATE_POLICY)
/* Calculate the policy digest for the referenced policy. */
hashAlg = object->misc.nv.public.nvPublic.nameAlg;
r = ifapi_calculate_tree(context, command->policyPath,
policy, hashAlg, &command->digest_idx,
&command->hash_size);
if (r != TSS2_RC_SUCCESS) {
ifapi_cleanup_ifapi_object(object);
}
return_try_again(r);
goto_if_error(r, "Fapi calculate tree.", error_cleanup);
fallthrough;
statecase(context->state, WRITE_AUTHORIZE_NV_WRITE_NV_RAM_PREPARE)
/* Copy hash alg followed by digest into a buffer to be written to NV ram */
r = Tss2_MU_TPMI_ALG_HASH_Marshal(
object->misc.nv.public.nvPublic.nameAlg,
&nvBuffer[0], maxNvSize, &offset);
goto_if_error_reset_state(r, "FAPI marshal hash alg", error_cleanup);
void * currentDigest =
&policy->policyDigests.digests[command->digest_idx].digest;
memcpy(&nvBuffer[offset], currentDigest, command->hash_size);
/* Store these data in the context to be used for re-entry on nv_write. */
nvCmd->data = &nvBuffer[0];
nvCmd->numBytes = command->hash_size + sizeof(TPMI_ALG_HASH);
fallthrough;
statecase(context->state, WRITE_AUTHORIZE_NV_WRITE_NV_RAM)
/* Perform the actual NV Write operation. */
r = ifapi_nv_write(context, nvCmd->nvPath, 0,
nvCmd->data, context->nv_cmd.numBytes);
return_try_again(r);
goto_if_error_reset_state(r, " FAPI NV Write", error_cleanup);
/* Perform esys serialization if necessary */
r = ifapi_esys_serialize_object(context->esys, object);
goto_if_error(r, "Prepare serialization", error_cleanup);
/* Save NV object to ensure that changed flags are updated. */
r = ifapi_keystore_store_async(&context->keystore, &context->io,
nvCmd->nvPath, object);
goto_if_error_reset_state(r, "Could not open: %sh", error_cleanup,
nvCmd->nvPath);
fallthrough;
statecase(context->state, WRITE_AUTHORIZE_NV_WRITE_OBJCECT)
/* Finish writing the NV object to the key store */
r = ifapi_keystore_store_finish(&context->keystore, &context->io);
return_try_again(r);
return_if_error_reset_state(r, "write_finish failed");
fallthrough;
statecase(context->state, WRITE_AUTHORIZE_NV_WRITE_POLICY_PREPARE)
r = ifapi_policy_store_store_async(&context->pstore, &context->io,
command->policyPath, policy);
goto_if_error_reset_state(r, "Could not open: %s", error_cleanup,
command->policyPath);
fallthrough;
statecase(context->state, WRITE_AUTHORIZE_NV_WRITE_POLICY)
/* Save policy with computed digest */
r = ifapi_policy_store_store_finish(&context->pstore, &context->io);
return_try_again(r);
return_if_error_reset_state(r, "write_finish failed");
fallthrough;
statecase(context->state, WRITE_AUTHORIZE_NV_CLEANUP)
/* Cleanup the session used for authorizing access to the NV index. */
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->policyPath);
SAFE_FREE(nvCmd->nvPath);
ifapi_session_clean(context);
ifapi_cleanup_policy(policy);
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_ifapi_object(object);
LOG_TRACE("finished");
return r;
}