Time.cpp

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/*
 *  Copyright (c) 2015-present, Facebook, Inc.
 *  All rights reserved.
 *
 *  This source code is licensed under the BSD-style license found in the
 *  LICENSE file in the root directory of this source tree. An additional grant
 *  of patent rights can be found in the PATENTS file in the same directory.
 *
 */
#include <proxygen/lib/utils/Time.h>

#include <folly/portability/OpenSSL.h>
#include <openssl/ossl_typ.h>

namespace proxygen {

std::string getDateTimeStr(const ASN1_TIME* const time) {
  if (!time) {
    return "";
  }

  constexpr auto bufSize = 32;
  char buf[bufSize] = {0};

  auto bio = BIO_new(BIO_s_mem());
  if (!bio) {
    return "";
  }

  ASN1_TIME_print(bio, time);
  const auto readResult = BIO_read(bio, buf, bufSize - 1);
  BIO_free(bio);

  return ((readResult <= 0) ? "" : std::string(buf));
}
}