Example #1
0
static void test_eax(void)
{
    uint8_t cipher[2], tag[16];

    /*
     * MSG: F7FB
     * KEY: 91945D3F4DCBEE0BF45EF52255F095A4
     * NONCE: BECAF043B0A23D843194BA972C66DEBD
     * HEADER: FA3BFD4806EB53FA
     * CIPHER: 19DD5C4C9331049D0BDAB0277408F67967E5
     */

    const void *key = "\x91\x94\x5d\x3f\x4d\xcb\xee\x0b\xf4\x5e\xf5\x22\x55\xf0\x95\xa4";
    const void *nonce = "\xbe\xca\xf0\x43\xb0\xa2\x3d\x84\x31\x94\xba\x97\x2c\x66\xde\xbd";
    size_t nnonce = 16;
    const void *header = "\xfa\x3b\xfd\x48\x06\xeb\x53\xfa";
    size_t nheader = 8;
    const void *msg = "\xf7\xfb";
    size_t nmsg = 2;

    cf_aes_context aes;
    cf_aes_init(&aes, key, 16);

    cf_eax_encrypt(&cf_aes, &aes,
                   msg, nmsg,
                   header, nheader,
                   nonce, nnonce,
                   cipher,
                   tag, sizeof tag);

    TEST_CHECK(memcmp("\x19\xdd", cipher, 2) == 0);
    TEST_CHECK(memcmp("\x5c\x4c\x93\x31\x04\x9d\x0b\xda\xb0\x27\x74\x08\xf6\x79\x67\xe5", tag, sizeof tag) == 0);

    int rc;
    uint8_t tmp[2];
    rc = cf_eax_decrypt(&cf_aes, &aes,
                        cipher, sizeof cipher,
                        header, nheader,
                        nonce, nnonce,
                        tag, sizeof tag,
                        tmp);
    TEST_CHECK(rc == 0);
    TEST_CHECK(memcmp(tmp, msg, nmsg) == 0);

    tag[0] ^= 0xff;
    rc = cf_eax_decrypt(&cf_aes, &aes,
                        cipher, sizeof cipher,
                        header, nheader,
                        nonce, nnonce,
                        tag, sizeof tag,
                        tmp);
    TEST_CHECK(rc == 1);
}
Example #2
0
static void check_eax(const void *key, size_t nkey,
                      const void *msg, size_t nmsg,
                      const void *nonce, size_t nnonce,
                      const void *header, size_t nheader,
                      const void *expect_cipher,
                      const void *expect_tag, size_t ntag)
{
  uint8_t cipher[32];
  uint8_t tag[16];

  assert(nmsg <= sizeof cipher);
  assert(ntag <= ntag);

  cf_aes_context aes;
  cf_aes_init(&aes, key, nkey);

  cf_eax_encrypt(&cf_aes, &aes,
                 msg, nmsg,
                 header, nheader,
                 nonce, nnonce,
                 cipher,
                 tag, ntag);

  TEST_CHECK(memcmp(expect_cipher, cipher, nmsg) == 0);
  TEST_CHECK(memcmp(expect_tag, tag, ntag) == 0);

  int rc;
  uint8_t tmp[sizeof cipher];
  rc = cf_eax_decrypt(&cf_aes, &aes,
                      cipher, nmsg,
                      header, nheader,
                      nonce, nnonce,
                      tag, ntag,
                      tmp);
  TEST_CHECK(rc == 0);
  TEST_CHECK(memcmp(tmp, msg, nmsg) == 0);

  tag[0] ^= 0xff;
  rc = cf_eax_decrypt(&cf_aes, &aes,
                      cipher, nmsg,
                      header, nheader,
                      nonce, nnonce,
                      tag, ntag,
                      tmp);
  TEST_CHECK(rc == 1);
}