C++ (Cpp) CBB_init_fixed Examples

Example #1

File: bytestring_test.c Project: HungMingWu/libquic

static int test_cbb_fixed(void) {
  CBB cbb;
  uint8_t buf[1];
  uint8_t *out_buf;
  size_t out_size;

  if (!CBB_init_fixed(&cbb, NULL, 0) ||
      CBB_add_u8(&cbb, 1) ||
      !CBB_finish(&cbb, &out_buf, &out_size) ||
      out_buf != NULL ||
      out_size != 0) {
    return 0;
  }

  if (!CBB_init_fixed(&cbb, buf, 1) ||
      !CBB_add_u8(&cbb, 1) ||
      CBB_add_u8(&cbb, 2) ||
      !CBB_finish(&cbb, &out_buf, &out_size) ||
      out_buf != buf ||
      out_size != 1 ||
      buf[0] != 1) {
    return 0;
  }

  return 1;
}

Example #2

File: ecdsa.c Project: dconnolly/ring

int ECDSA_sign_ex(int type, const uint8_t *digest, size_t digest_len,
                  uint8_t *sig, unsigned int *sig_len, const BIGNUM *kinv,
                  const BIGNUM *r, EC_KEY *eckey) {
  int ret = 0;
  ECDSA_SIG *s = NULL;

  s = ECDSA_do_sign_ex(digest, digest_len, kinv, r, eckey);
  if (s == NULL) {
    *sig_len = 0;
    goto err;
  }

  CBB cbb;
  CBB_zero(&cbb);
  size_t len;
  if (!CBB_init_fixed(&cbb, sig, ECDSA_size(eckey)) ||
      !ECDSA_SIG_marshal(&cbb, s) ||
      !CBB_finish(&cbb, NULL, &len)) {
    OPENSSL_PUT_ERROR(ECDSA, ECDSA_R_ENCODE_ERROR);
    CBB_cleanup(&cbb);
    *sig_len = 0;
    goto err;
  }
  *sig_len = (unsigned)len;
  ret = 1;

err:
  ECDSA_SIG_free(s);
  return ret;
}