/*

 * Copyright 1999-2021 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/asn1t.h>

#include <openssl/conf.h>

#include <openssl/x509v3.h>

#include "ext_dat.h"

static void *v2i_EXTENDED_KEY_USAGE(const X509V3_EXT_METHOD *method,

                                    X509V3_CTX *ctx,

                                    STACK_OF(CONF_VALUE) *nval);

static STACK_OF(CONF_VALUE) *i2v_EXTENDED_KEY_USAGE(const X509V3_EXT_METHOD

                                                    *method, void *eku, STACK_OF(CONF_VALUE)

                                                    *extlist);

const X509V3_EXT_METHOD ossl_v3_ext_ku = {

    NID_ext_key_usage, 0,

    ASN1_ITEM_ref(EXTENDED_KEY_USAGE),

    0, 0, 0, 0,

    0, 0,

    i2v_EXTENDED_KEY_USAGE,

    v2i_EXTENDED_KEY_USAGE,

    0, 0,

    NULL

};

/* NB OCSP acceptable responses also is a SEQUENCE OF OBJECT */

const X509V3_EXT_METHOD ossl_v3_ocsp_accresp = {

    NID_id_pkix_OCSP_acceptableResponses, 0,

    ASN1_ITEM_ref(EXTENDED_KEY_USAGE),

    0, 0, 0, 0,

    0, 0,

    i2v_EXTENDED_KEY_USAGE,

    v2i_EXTENDED_KEY_USAGE,

    0, 0,

    NULL

};

ASN1_ITEM_TEMPLATE(EXTENDED_KEY_USAGE) =

        ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SEQUENCE_OF, 0, EXTENDED_KEY_USAGE, ASN1_OBJECT)

ASN1_ITEM_TEMPLATE_END(EXTENDED_KEY_USAGE)

IMPLEMENT_ASN1_FUNCTIONS(EXTENDED_KEY_USAGE)

static STACK_OF(CONF_VALUE) *i2v_EXTENDED_KEY_USAGE(const X509V3_EXT_METHOD

                                                    *method, void *a, STACK_OF(CONF_VALUE)

                                                    *ext_list)

{

    EXTENDED_KEY_USAGE *eku = a;

    int i;

    ASN1_OBJECT *obj;

    char obj_tmp[80];

    for (i = 0; i < sk_ASN1_OBJECT_num(eku); i++) {

        obj = sk_ASN1_OBJECT_value(eku, i);

        i2t_ASN1_OBJECT(obj_tmp, 80, obj);

        X509V3_add_value(NULL, obj_tmp, &ext_list);

    }

    return ext_list;

}

static void *v2i_EXTENDED_KEY_USAGE(const X509V3_EXT_METHOD *method,

                                    X509V3_CTX *ctx,

                                    STACK_OF(CONF_VALUE) *nval)

{

    EXTENDED_KEY_USAGE *extku;

    char *extval;

    ASN1_OBJECT *objtmp;

    CONF_VALUE *val;

    const int num = sk_CONF_VALUE_num(nval);

    int i;

    extku = sk_ASN1_OBJECT_new_reserve(NULL, num);

    if (extku == NULL) {

        ERR_raise(ERR_LIB_X509V3, ERR_R_MALLOC_FAILURE);

        sk_ASN1_OBJECT_free(extku);

        return NULL;

    }

    for (i = 0; i < num; i++) {

        val = sk_CONF_VALUE_value(nval, i);

        if (val->value)

            extval = val->value;

        else

            extval = val->name;

        if ((objtmp = OBJ_txt2obj(extval, 0)) == NULL) {

            sk_ASN1_OBJECT_pop_free(extku, ASN1_OBJECT_free);

            ERR_raise_data(ERR_LIB_X509V3, X509V3_R_INVALID_OBJECT_IDENTIFIER,

                           "%s", extval);

            return NULL;

        }

        sk_ASN1_OBJECT_push(extku, objtmp);  /* no failure as it was reserved */

    }

    return extku;

}