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RIOT/tests/unittests/tests-relic/tests-relic.c 3.38 KB
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  /*
   * Copyright (C) 2014 Tobias Markmann <tm@ayena.de>
   *
   * This file is subject to the terms and conditions of the GNU Lesser
   * General Public License v2.1. See the file LICENSE in the top level
   * directory for more details.
   */
  
  
  #define TEST_RELIC_SHOW_OUTPUT (0) /**< set if encoded/decoded string is displayed */
  
  #if (TEST_RELIC_SHOW_OUTPUT == 1)
  #include <stdio.h>
  #endif
  #include <assert.h>
  #include <stdlib.h>
  
  #include "relic.h"
  #include "embUnit.h"
  
  void print_mem(void *mem, int len) {
    int i;
    unsigned char *p = (unsigned char *)mem;
    for (i=0;i<len;i++) {
      printf("0x%02x ", p[i]);
    }
    printf("\n");
  }
  
  static void setUp(void)
  {
      /* Initialize RELIC */
      TEST_ASSERT_EQUAL_INT(STS_OK, core_init());
  }
  
  static void tearDown(void)
  {
      /* Finalize RELIC */
      core_clean();
  }
  
  static void tests_relic_ecdh(void)
  {
      /*  The following is an example for doing an elliptic-curve Diffie-Hellman
          key exchange.
      */
  
      /* Select an elliptic curve configuration */
      if (ec_param_set_any() == STS_OK) {
  #if (TEST_RELIC_SHOW_OUTPUT == 1)
          ec_param_print();
  #endif
  
          bn_t privateA;
          ec_t publicA;
          uint8_t sharedKeyA[MD_LEN];
  
          bn_t privateB;
          ec_t publicB;
          uint8_t sharedKeyB[MD_LEN];
  
          bn_null(privateA);
          ec_null(publicA);
  
          bn_new(privateA);
          ec_new(publicA);
  
          bn_null(privateB);
          ec_null(publicB);
  
          bn_new(privateB);
          ec_new(publicB);
  
          /* User A generates private/public key pair */
          TEST_ASSERT_EQUAL_INT(STS_OK, cp_ecdh_gen(privateA, publicA));
  
  #if (TEST_RELIC_SHOW_OUTPUT == 1)
          printf("User A\n");
          printf("======\n");
          printf("private key: ");
          bn_print(privateA);
          printf("\npublic key:  ");
          ec_print(publicA);
          printf("\n");
  #endif
  
          /* User B generates private/public key pair */
          TEST_ASSERT_EQUAL_INT(STS_OK, cp_ecdh_gen(privateB, publicB));
  
  #if (TEST_RELIC_SHOW_OUTPUT == 1)
          printf("User B\n");
          printf("======\n");
          printf("private key: ");
          bn_print(privateB);
          printf("\npublic key:  ");
          ec_print(publicB);
          printf("\n");
  #endif
  
          /* In a protocol you would exchange the public keys now */
  
          /* User A calculates shared secret */
          TEST_ASSERT_EQUAL_INT(STS_OK, cp_ecdh_key(sharedKeyA, MD_LEN, privateA, publicB));
  
  #if (TEST_RELIC_SHOW_OUTPUT == 1)
          printf("\nshared key computed by user A: ");
          print_mem(sharedKeyA, MD_LEN);
  #endif
  
          /* User B calculates shared secret */
          TEST_ASSERT_EQUAL_INT(STS_OK, cp_ecdh_key(sharedKeyB, MD_LEN, privateB, publicA));
  
  #if (TEST_RELIC_SHOW_OUTPUT == 1)
          printf("\nshared key computed by user B: ");
          print_mem(sharedKeyB, MD_LEN);
  #endif
  
          /* The secrets should be the same now */
          TEST_ASSERT_EQUAL_INT(CMP_EQ, util_cmp_const(sharedKeyA, sharedKeyB, MD_LEN));
  
          bn_free(privateA);
          ec_free(publicA);
  
          bn_free(privateB);
          ec_free(publicB);
  #if (TEST_RELIC_SHOW_OUTPUT == 1)
          printf("\nRELIC EC-DH test successful\n");
  #endif
      }
  
  }
  
  TestRef tests_relic_all(void)
  {
      EMB_UNIT_TESTFIXTURES(fixtures) {
          new_TestFixture(tests_relic_ecdh)
      };
  
      EMB_UNIT_TESTCALLER(RELICTest, setUp, tearDown, fixtures);
      return (TestRef)&RELICTest;
  }
  
  void tests_relic(void)
  {
      TESTS_RUN(tests_relic_all());
  }