/*

 * Copyright 2003-2026 The OpenSSL Project Authors. All Rights Reserved.

 *

 * Licensed under the Apache License 2.0 (the "License").  You may not use

 * this file except in compliance with the License.  You can obtain a copy

 * in the file LICENSE in the source distribution or at

 * https://www.openssl.org/source/license.html

 */

#include <stdio.h>

#include "internal/cryptlib.h"

#include <openssl/asn1.h>

#include <openssl/asn1t.h>

#include <openssl/conf.h>

#include <openssl/x509v3.h>

#include "ext_dat.h"

static STACK_OF(CONF_VALUE) *i2v_POLICY_CONSTRAINTS(const X509V3_EXT_METHOD

                                                        *method,

    void *bcons, STACK_OF(CONF_VALUE) *extlist);

static void *v2i_POLICY_CONSTRAINTS(const X509V3_EXT_METHOD *method,

    X509V3_CTX *ctx,

    STACK_OF(CONF_VALUE) *values);

const X509V3_EXT_METHOD ossl_v3_policy_constraints = {

    NID_policy_constraints, 0,

    ASN1_ITEM_ref(POLICY_CONSTRAINTS),

    0, 0, 0, 0,

    0, 0,

    i2v_POLICY_CONSTRAINTS,

    v2i_POLICY_CONSTRAINTS,

    NULL, NULL,

    NULL

};

ASN1_SEQUENCE(POLICY_CONSTRAINTS) = {

    ASN1_IMP_OPT(POLICY_CONSTRAINTS, requireExplicitPolicy, ASN1_INTEGER, 0),

    ASN1_IMP_OPT(POLICY_CONSTRAINTS, inhibitPolicyMapping, ASN1_INTEGER, 1)

} ASN1_SEQUENCE_END(POLICY_CONSTRAINTS)

IMPLEMENT_ASN1_ALLOC_FUNCTIONS(POLICY_CONSTRAINTS)

static STACK_OF(CONF_VALUE) *i2v_POLICY_CONSTRAINTS(const X509V3_EXT_METHOD

                                                        *method,

    void *a, STACK_OF(CONF_VALUE) *extlist)

{

    POLICY_CONSTRAINTS *pcons = a;

    X509V3_add_value_int("Require Explicit Policy",

        pcons->requireExplicitPolicy, &extlist);

    X509V3_add_value_int("Inhibit Policy Mapping",

        pcons->inhibitPolicyMapping, &extlist);

    return extlist;

}

static void *v2i_POLICY_CONSTRAINTS(const X509V3_EXT_METHOD *method,

    X509V3_CTX *ctx,

    STACK_OF(CONF_VALUE) *values)

{

    POLICY_CONSTRAINTS *pcons = NULL;

    CONF_VALUE *val;

    int i;

    if ((pcons = POLICY_CONSTRAINTS_new()) == NULL) {

        ERR_raise(ERR_LIB_X509V3, ERR_R_ASN1_LIB);

        return NULL;

    }

    for (i = 0; i < sk_CONF_VALUE_num(values); i++) {

        val = sk_CONF_VALUE_value(values, i);

        if (strcmp(val->name, "requireExplicitPolicy") == 0) {

            if (pcons->requireExplicitPolicy != NULL) {

                ERR_raise_data(ERR_LIB_X509V3, X509V3_R_DUPLICATE_FIELD,

                    "field=%s", val->name);

                goto err;

            }

            if (!X509V3_get_value_int(val, &pcons->requireExplicitPolicy))

                goto err;

        } else if (strcmp(val->name, "inhibitPolicyMapping") == 0) {

            if (pcons->inhibitPolicyMapping != NULL) {

                ERR_raise_data(ERR_LIB_X509V3, X509V3_R_DUPLICATE_FIELD,

                    "field=%s", val->name);

                goto err;

            }

            if (!X509V3_get_value_int(val, &pcons->inhibitPolicyMapping))

                goto err;

        } else {

            ERR_raise_data(ERR_LIB_X509V3, X509V3_R_INVALID_NAME,

                "%s", val->name);

            goto err;

        }

    }

    if (pcons->inhibitPolicyMapping == NULL

        && pcons->requireExplicitPolicy == NULL) {

        ERR_raise(ERR_LIB_X509V3, X509V3_R_ILLEGAL_EMPTY_EXTENSION);

        goto err;

    }

    return pcons;

err:

    POLICY_CONSTRAINTS_free(pcons);

    return NULL;

}