Line data    Source code

       1             : /**
       2             :  * The MIT License (MIT)
       3             :  *
       4             :  * Copyright (c) 2021 RSK Labs Ltd
       5             :  *
       6             :  * Permission is hereby granted, free of charge, to any person obtaining a copy
       7             :  * of this software and associated documentation files (the "Software"), to
       8             :  * deal in the Software without restriction, including without limitation the
       9             :  * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
      10             :  * sell copies of the Software, and to permit persons to whom the Software is
      11             :  * furnished to do so, subject to the following conditions:
      12             :  *
      13             :  * The above copyright notice and this permission notice shall be included in
      14             :  * all copies or substantial portions of the Software.
      15             :  *
      16             :  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
      17             :  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
      18             :  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
      19             :  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
      20             :  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
      21             :  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
      22             :  * IN THE SOFTWARE.
      23             :  */
      24             : 
      25             : #include <unistd.h>
      26             : 
      27             : #include "hsm_u.h"
      28             : #include "enclave_provider.h"
      29             : #include "log.h"
      30             : 
      31             : // Simulation build
      32             : #ifndef SIM_BUILD
      33             : #define CREATE_ENCLAVE_FLAGS 0
      34             : #else
      35             : #define CREATE_ENCLAVE_FLAGS OE_ENCLAVE_FLAG_SIMULATE
      36             : #endif
      37             : 
      38             : // Global pointer to the enclave. This should be the only global pointer to the
      39             : // enclave
      40             : static char* G_enclave_path = NULL;
      41             : static oe_enclave_t* G_enclave = NULL;
      42             : 
      43           8 : bool epro_init(char* enclave_path) {
      44           8 :     G_enclave_path = enclave_path;
      45           8 :     if (access(G_enclave_path, F_OK) != 0) {
      46           2 :         LOG("Invalid enclave path given: %s\n", G_enclave_path);
      47           2 :         return false;
      48             :     }
      49           6 :     return true;
      50             : }
      51             : 
      52           7 : oe_enclave_t* epro_get_enclave() {
      53           7 :     if (NULL == G_enclave) {
      54           5 :         oe_enclave_t* enclave = NULL;
      55           5 :         LOG("Creating HSM enclave...\n");
      56           5 :         oe_result_t result = oe_create_hsm_enclave(G_enclave_path,
      57             :                                                    OE_ENCLAVE_TYPE_AUTO,
      58             :                                                    CREATE_ENCLAVE_FLAGS,
      59             :                                                    NULL,
      60             :                                                    0,
      61             :                                                    &enclave);
      62           5 :         if (OE_OK != result) {
      63           1 :             LOG("Failed to create enclave: oe_result=%u (%s)\n",
      64             :                 result,
      65             :                 oe_result_str(result));
      66           1 :             return NULL;
      67             :         }
      68             : 
      69           4 :         LOG("HSM enclave created\n");
      70           4 :         G_enclave = enclave;
      71             :     }
      72             : 
      73           6 :     return G_enclave;
      74             : }
      75             : 
      76          13 : void epro_finalize_enclave() {
      77          13 :     if (NULL != G_enclave) {
      78           4 :         oe_terminate_enclave(G_enclave);
      79           4 :         LOG("HSM enclave terminated\n");
      80           4 :         G_enclave = NULL;
      81             :     }
      82          13 : }