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/*
 * Copyright 2002-2018 The OpenSSL Project Authors. All Rights Reserved.
 *
 * Licensed under the OpenSSL license (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/ctype.h"
#include <openssl/crypto.h>
#include "internal/cryptlib.h"
#include <openssl/conf.h>
#include <openssl/x509.h>
#include "internal/asn1_int.h"
#include "internal/objects.h"

/* Simple ASN1 OID module: add all objects in a given section */

static int do_create(const char *value, const char *name);

static int oid_module_init(CONF_IMODULE *md, const CONF *cnf)
{
    int i;
    const char *oid_section;
    STACK_OF(CONF_VALUE) *sktmp;
    CONF_VALUE *oval;

    oid_section = CONF_imodule_get_value(md);
    if ((sktmp = NCONF_get_section(cnf, oid_section)) == NULL) {
        ASN1err(ASN1_F_OID_MODULE_INIT, ASN1_R_ERROR_LOADING_SECTION);
        return 0;
    }
    for (i = 0; i < sk_CONF_VALUE_num(sktmp); i++) {
        oval = sk_CONF_VALUE_value(sktmp, i);
        if (!do_create(oval->value, oval->name)) {
            ASN1err(ASN1_F_OID_MODULE_INIT, ASN1_R_ADDING_OBJECT);
            return 0;
        }
    }
    return 1;
}

static void oid_module_finish(CONF_IMODULE *md)
{
}

void ASN1_add_oid_module(void)
{
    CONF_module_add("oid_section", oid_module_init, oid_module_finish);
}

/*-
 * Create an OID based on a name value pair. Accept two formats.
 * shortname = 1.2.3.4
 * shortname = some long name, 1.2.3.4
 */

static int do_create(const char *value, const char *name)
{
    int nid;
    const char *ln, *ostr, *p;
    char *lntmp = NULL;

    p = strrchr(value, ',');
    if (p == NULL) {
        ln = name;
        ostr = value;
    } else {
        ln = value;
        ostr = p + 1;
        if (*ostr == '\0')
            return 0;
        while (ossl_isspace(*ostr))
            ostr++;
        while (ossl_isspace(*ln))
            ln++;
        p--;
        while (ossl_isspace(*p)) {
            if (p == ln)
                return 0;
            p--;
        }
        p++;
        if ((lntmp = OPENSSL_malloc((p - ln) + 1)) == NULL) {
            ASN1err(ASN1_F_DO_CREATE, ERR_R_MALLOC_FAILURE);
            return 0;
        }
        memcpy(lntmp, ln, p - ln);
        lntmp[p - ln] = '\0';
        ln = lntmp;
    }

    nid = OBJ_create(ostr, name, ln);

    OPENSSL_free(lntmp);

    return nid != NID_undef;
}