// Copyright 2016 The BoringSSL Authors

//

// Licensed under the Apache License, Version 2.0 (the "License");

// you may not use this file except in compliance with the License.

// You may obtain a copy of the License at

//

//     https://www.apache.org/licenses/LICENSE-2.0

//

// Unless required by applicable law or agreed to in writing, software

// distributed under the License is distributed on an "AS IS" BASIS,

// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

// See the License for the specific language governing permissions and

// limitations under the License.

#include <openssl/bytestring.h>

#include <assert.h>

#include <limits.h>

#include <string.h>

#include <openssl/mem.h>

#include "internal.h"

#include "../internal.h"

using namespace bssl;

int bssl::CBB_finish_i2d(CBB *cbb, uint8_t **outp) {

  assert(!cbb->is_child);

  assert(cbb->u.base.can_resize);

  uint8_t *der;

  size_t der_len;

  if (!CBB_finish(cbb, &der, &der_len)) {

    CBB_cleanup(cbb);

    return -1;

  }

  if (der_len > INT_MAX) {

    OPENSSL_free(der);

    return -1;

  }

  if (outp != nullptr) {

    if (*outp == nullptr) {

      *outp = der;

      der = nullptr;

    } else {

      OPENSSL_memcpy(*outp, der, der_len);

      *outp += der_len;

    }

  }

  OPENSSL_free(der);

  return (int)der_len;

}