// Copyright 2003-2016 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 <openssl/asn1t.h>

#include <openssl/conf.h>

#include <openssl/err.h>

#include <openssl/obj.h>

#include <openssl/x509.h>

#include "internal.h"

using namespace bssl;

static void *v2i_POLICY_MAPPINGS(const X509V3_EXT_METHOD *method,

                                 const X509V3_CTX *ctx,

                                 const STACK_OF(CONF_VALUE) *nval);

static STACK_OF(CONF_VALUE) *i2v_POLICY_MAPPINGS(

    const X509V3_EXT_METHOD *method, void *pmps, STACK_OF(CONF_VALUE) *extlist);

const X509V3_EXT_METHOD bssl::v3_policy_mappings = {

    NID_policy_mappings,

    0,

    ASN1_ITEM_ref(POLICY_MAPPINGS),

    nullptr,

    nullptr,

    nullptr,

    nullptr,

    nullptr,

    nullptr,

    i2v_POLICY_MAPPINGS,

    v2i_POLICY_MAPPINGS,

    nullptr,

    nullptr,

    nullptr,

};

ASN1_SEQUENCE(POLICY_MAPPING) = {

    ASN1_SIMPLE(POLICY_MAPPING, issuerDomainPolicy, ASN1_OBJECT),

    ASN1_SIMPLE(POLICY_MAPPING, subjectDomainPolicy, ASN1_OBJECT),

} ASN1_SEQUENCE_END(POLICY_MAPPING)

ASN1_ITEM_TEMPLATE(POLICY_MAPPINGS) = ASN1_EX_TEMPLATE_TYPE(

    ASN1_TFLG_SEQUENCE_OF, 0, POLICY_MAPPINGS, POLICY_MAPPING)

ASN1_ITEM_TEMPLATE_END(POLICY_MAPPINGS)

IMPLEMENT_ASN1_ALLOC_FUNCTIONS(POLICY_MAPPING)

static STACK_OF(CONF_VALUE) *i2v_POLICY_MAPPINGS(

    const X509V3_EXT_METHOD *method, void *a, STACK_OF(CONF_VALUE) *ext_list) {

  const POLICY_MAPPINGS *pmaps = reinterpret_cast<POLICY_MAPPINGS *>(a);

  for (size_t i = 0; i < sk_POLICY_MAPPING_num(pmaps); i++) {

    const POLICY_MAPPING *pmap = sk_POLICY_MAPPING_value(pmaps, i);

    char obj_tmp1[80], obj_tmp2[80];

    i2t_ASN1_OBJECT(obj_tmp1, 80, pmap->issuerDomainPolicy);

    i2t_ASN1_OBJECT(obj_tmp2, 80, pmap->subjectDomainPolicy);

    X509V3_add_value(obj_tmp1, obj_tmp2, &ext_list);

  }

  return ext_list;

}

static void *v2i_POLICY_MAPPINGS(const X509V3_EXT_METHOD *method,

                                 const X509V3_CTX *ctx,

                                 const STACK_OF(CONF_VALUE) *nval) {

  POLICY_MAPPINGS *pmaps = sk_POLICY_MAPPING_new_null();

  if (pmaps == nullptr) {

    return nullptr;

  }

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

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

    if (!val->value || !val->name) {

      OPENSSL_PUT_ERROR(X509V3, X509V3_R_INVALID_OBJECT_IDENTIFIER);

      X509V3_conf_err(val);

      goto err;

    }

    POLICY_MAPPING *pmap = POLICY_MAPPING_new();

    if (pmap == nullptr || !sk_POLICY_MAPPING_push(pmaps, pmap)) {

      POLICY_MAPPING_free(pmap);

      goto err;

    }

    pmap->issuerDomainPolicy = OBJ_txt2obj(val->name, 0);

    pmap->subjectDomainPolicy = OBJ_txt2obj(val->value, 0);

    if (!pmap->issuerDomainPolicy || !pmap->subjectDomainPolicy) {

      OPENSSL_PUT_ERROR(X509V3, X509V3_R_INVALID_OBJECT_IDENTIFIER);

      X509V3_conf_err(val);

      goto err;

    }

  }

  return pmaps;

err:

  sk_POLICY_MAPPING_pop_free(pmaps, POLICY_MAPPING_free);

  return nullptr;

}