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- /*
- * Copyright (C) 2011-2018 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:
- *
- * * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * * 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.
- * * Neither the name of Intel Corporation nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * 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
- * OWNER 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 "monotonic_counter_database_types.h"
- #include "monotonic_counter_database_sqlite_access_hw_mc.h"
- #include "psda_service.h"
- #include "pse_op_t.h"
- #include <assert.h>
- #include <limits.h>
- static cse_rpdata_t global_cached_rpdata;
- static bool is_rpdata_cache_initialized = false;
- pse_op_error_t read_rpdata()
- {
- uint8_t rpdata[ROOT_HASH_SIZE];
- uint32_t rp_epoch;
- pse_op_error_t rc;
- rc = psda_read_rpdata(rpdata, &rp_epoch);
- if(OP_SUCCESS == rc)
- {
- // Check epoch first
- if(is_rpdata_cache_initialized && global_cached_rpdata.rpdata_epoch != rp_epoch)
- {
- // RPEPOCH has changed
- return OP_ERROR_INTERNAL;
- }
- // update rpdata cache
- global_cached_rpdata.rpdata_epoch = rp_epoch;
- memcpy(global_cached_rpdata.rpdata_roothash, rpdata, sizeof(global_cached_rpdata.rpdata_roothash));
- is_rpdata_cache_initialized = true;
- }
- return rc;
- }
- pse_op_error_t update_rpdata(uint8_t* rpdata_new)
- {
- assert(rpdata_new!=NULL);
- assert(false != is_rpdata_cache_initialized);
- uint32_t rp_epoch;
- pse_op_error_t rc;
- rc = psda_update_rpdata(global_cached_rpdata.rpdata_roothash, rpdata_new, &rp_epoch);
- if(OP_SUCCESS == rc)
- {
- // Check epoch
- if(is_rpdata_cache_initialized && global_cached_rpdata.rpdata_epoch != rp_epoch)
- {
- // RPEPOCH has changed
- return OP_ERROR_INTERNAL;
- }
- // update rpdata cache
- global_cached_rpdata.rpdata_epoch = rp_epoch;
- memcpy(global_cached_rpdata.rpdata_roothash, rpdata_new, sizeof(global_cached_rpdata.rpdata_roothash));
- is_rpdata_cache_initialized = true;
- }
- return rc;
- }
- pse_op_error_t reset_rpdata()
- {
- assert(false != is_rpdata_cache_initialized);
- uint8_t rpdata_new[SGX_RPDATA_SIZE];
- uint32_t rp_epoch;
- pse_op_error_t rc;
- rc = psda_reset_rpdata(global_cached_rpdata.rpdata_roothash, rpdata_new, &rp_epoch);
- if(OP_SUCCESS == rc)
- {
- // update rpdata cache
- global_cached_rpdata.rpdata_epoch = rp_epoch;
- memcpy(global_cached_rpdata.rpdata_roothash, rpdata_new, sizeof(global_cached_rpdata.rpdata_roothash));
- is_rpdata_cache_initialized = true;
- }
- return rc;
- }
- pse_op_error_t get_cached_roothash(uint8_t *roothash)
- {
- assert(roothash);
- assert(is_rpdata_cache_initialized);
- if(!is_rpdata_cache_initialized) // RPDATA hasn't been cached in PSE-OP
- {
- return OP_ERROR_INTERNAL;
- }
- memcpy(roothash, global_cached_rpdata.rpdata_roothash, ROOT_HASH_SIZE);
- return OP_SUCCESS;
- }
- pse_op_error_t get_cached_rpepoch(uint32_t *rpepoch)
- {
- assert(rpepoch);
- assert(is_rpdata_cache_initialized);
- if(!is_rpdata_cache_initialized)
- {
- return OP_ERROR_INTERNAL;
- }
- *rpepoch = global_cached_rpdata.rpdata_epoch;
- return OP_SUCCESS;
- }
- // clear cached RPDATA
- void clear_cached_rpdata()
- {
- is_rpdata_cache_initialized = false;
- memset(&global_cached_rpdata, 0, sizeof(global_cached_rpdata));
- }
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