// Copyright 1999-2016 The OpenSSL Project Authors. All Rights Reserved.

//

// 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 <stdio.h>

#include <string.h>

#include <openssl/asn1.h>

#include <openssl/asn1t.h>

#include <openssl/conf.h>

#include <openssl/err.h>

#include <openssl/mem.h>

#include <openssl/obj.h>

#include <openssl/x509.h>

#include "internal.h"

using namespace bssl;

static STACK_OF(CONF_VALUE) *i2v_AUTHORITY_INFO_ACCESS(

    const X509V3_EXT_METHOD *method, void *ext, STACK_OF(CONF_VALUE) *ret);

static void *v2i_AUTHORITY_INFO_ACCESS(const X509V3_EXT_METHOD *method,

                                       const X509V3_CTX *ctx,

                                       const STACK_OF(CONF_VALUE) *nval);

const X509V3_EXT_METHOD bssl::v3_info = {

    NID_info_access,

    X509V3_EXT_MULTILINE,

    ASN1_ITEM_ref(AUTHORITY_INFO_ACCESS),

    nullptr,

    nullptr,

    nullptr,

    nullptr,

    nullptr,

    nullptr,

    i2v_AUTHORITY_INFO_ACCESS,

    v2i_AUTHORITY_INFO_ACCESS,

    nullptr,

    nullptr,

    nullptr,

};

const X509V3_EXT_METHOD bssl::v3_sinfo = {

    NID_sinfo_access,

    X509V3_EXT_MULTILINE,

    ASN1_ITEM_ref(AUTHORITY_INFO_ACCESS),

    nullptr,

    nullptr,

    nullptr,

    nullptr,

    nullptr,

    nullptr,

    i2v_AUTHORITY_INFO_ACCESS,

    v2i_AUTHORITY_INFO_ACCESS,

    nullptr,

    nullptr,

    nullptr,

};

ASN1_SEQUENCE(ACCESS_DESCRIPTION) = {

    ASN1_SIMPLE(ACCESS_DESCRIPTION, method, ASN1_OBJECT),

    ASN1_SIMPLE(ACCESS_DESCRIPTION, location, GENERAL_NAME),

} ASN1_SEQUENCE_END(ACCESS_DESCRIPTION)

IMPLEMENT_ASN1_ALLOC_FUNCTIONS(ACCESS_DESCRIPTION)

ASN1_ITEM_TEMPLATE(AUTHORITY_INFO_ACCESS) = ASN1_EX_TEMPLATE_TYPE(

    ASN1_TFLG_SEQUENCE_OF, 0, GeneralNames, ACCESS_DESCRIPTION)

ASN1_ITEM_TEMPLATE_END(AUTHORITY_INFO_ACCESS)

IMPLEMENT_ASN1_FUNCTIONS_const(AUTHORITY_INFO_ACCESS)

static STACK_OF(CONF_VALUE) *i2v_AUTHORITY_INFO_ACCESS(

    const X509V3_EXT_METHOD *method, void *ext, STACK_OF(CONF_VALUE) *ret) {

  const AUTHORITY_INFO_ACCESS *ainfo =

      reinterpret_cast<const AUTHORITY_INFO_ACCESS *>(ext);

  ACCESS_DESCRIPTION *desc;

  char objtmp[80], *name;

  CONF_VALUE *vtmp;

  STACK_OF(CONF_VALUE) *tret = ret;

  for (size_t i = 0; i < sk_ACCESS_DESCRIPTION_num(ainfo); i++) {

    STACK_OF(CONF_VALUE) *tmp;

    desc = sk_ACCESS_DESCRIPTION_value(ainfo, i);

    tmp = i2v_GENERAL_NAME(method, desc->location, tret);

    if (tmp == nullptr) {

      goto err;

    }

    tret = tmp;

    vtmp = sk_CONF_VALUE_value(tret, i);

    i2t_ASN1_OBJECT(objtmp, sizeof objtmp, desc->method);

    if (OPENSSL_asprintf(&name, "%s - %s", objtmp, vtmp->name) == -1) {

      goto err;

    }

    OPENSSL_free(vtmp->name);

    vtmp->name = name;

  }

  if (ret == nullptr && tret == nullptr) {

    return sk_CONF_VALUE_new_null();

  }

  return tret;

err:

  if (ret == nullptr && tret != nullptr) {

    sk_CONF_VALUE_pop_free(tret, X509V3_conf_free);

  }

  return nullptr;

}

static void *v2i_AUTHORITY_INFO_ACCESS(const X509V3_EXT_METHOD *method,

                                       const X509V3_CTX *ctx,

                                       const STACK_OF(CONF_VALUE) *nval) {

  UniquePtr<AUTHORITY_INFO_ACCESS> ainfo(sk_ACCESS_DESCRIPTION_new_null());

  if (ainfo == nullptr) {

    return nullptr;

  }

  for (size_t i = 0; i < sk_CONF_VALUE_num(nval); i++) {

    const CONF_VALUE *cnf = sk_CONF_VALUE_value(nval, i);

    UniquePtr<ACCESS_DESCRIPTION> acc(ACCESS_DESCRIPTION_new());

    if (acc == nullptr) {

      return nullptr;

    }

    char *ptmp = strchr(cnf->name, ';');

    if (!ptmp) {

      OPENSSL_PUT_ERROR(X509V3, X509V3_R_INVALID_SYNTAX);

      return nullptr;

    }

    CONF_VALUE ctmp;

    ctmp.name = ptmp + 1;

    ctmp.value = cnf->value;

    if (!v2i_GENERAL_NAME_ex(acc->location, method, ctx, &ctmp, 0)) {

      return nullptr;

    }

    UniquePtr<char> objtmp(OPENSSL_strndup(cnf->name, ptmp - cnf->name));

    if (objtmp == nullptr) {

      return nullptr;

    }

    acc->method = OBJ_txt2obj(objtmp.get(), 0);

    if (!acc->method) {

      OPENSSL_PUT_ERROR(X509V3, X509V3_R_BAD_OBJECT);

      ERR_add_error_data(2, "value=", objtmp.get());

      return nullptr;

    }

    if (!PushToStack(ainfo.get(), std::move(acc))) {

      return nullptr;

    }

  }

  return ainfo.release();

}