/* conf_lib.c */

/*

 * Written by Richard Levitte (richard@levitte.org) for the OpenSSL project

 * 2000.

 */

/* ====================================================================

 * Copyright (c) 2000 The OpenSSL Project.  All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 *

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 *

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in

 *    the documentation and/or other materials provided with the

 *    distribution.

 *

 * 3. All advertising materials mentioning features or use of this

 *    software must display the following acknowledgment:

 *    "This product includes software developed by the OpenSSL Project

 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"

 *

 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to

 *    endorse or promote products derived from this software without

 *    prior written permission. For written permission, please contact

 *    licensing@OpenSSL.org.

 *

 * 5. Products derived from this software may not be called "OpenSSL"

 *    nor may "OpenSSL" appear in their names without prior written

 *    permission of the OpenSSL Project.

 *

 * 6. Redistributions of any form whatsoever must retain the following

 *    acknowledgment:

 *    "This product includes software developed by the OpenSSL Project

 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"

 *

 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY

 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR

 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT

 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;

 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,

 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED

 * OF THE POSSIBILITY OF SUCH DAMAGE.

 * ====================================================================

 *

 * This product includes cryptographic software written by Eric Young

 * (eay@cryptsoft.com).  This product includes software written by Tim

 * Hudson (tjh@cryptsoft.com).

 *

 */

#include <stdio.h>

#include <openssl/crypto.h>

#include <openssl/err.h>

#include <openssl/conf.h>

#include <openssl/conf_api.h>

#include <openssl/lhash.h>

const char CONF_version[] = "CONF" OPENSSL_VERSION_PTEXT;

static CONF_METHOD *default_CONF_method = NULL;

/* Init a 'CONF' structure from an old LHASH */

void CONF_set_nconf(CONF *conf, LHASH_OF(CONF_VALUE) *hash)

{

    if (default_CONF_method == NULL)

        default_CONF_method = NCONF_default();

    default_CONF_method->init(conf);

    conf->data = hash;

}

/*

 * The following section contains the "CONF classic" functions, rewritten in

 * terms of the new CONF interface.

 */

int CONF_set_default_method(CONF_METHOD *meth)

{

    default_CONF_method = meth;

    return 1;

}

LHASH_OF(CONF_VALUE) *CONF_load(LHASH_OF(CONF_VALUE) *conf, const char *file,

                                long *eline)

{

    LHASH_OF(CONF_VALUE) *ltmp;

    BIO *in = NULL;

#ifdef OPENSSL_SYS_VMS

    in = BIO_new_file(file, "r");

#else

    in = BIO_new_file(file, "rb");

#endif

    if (in == NULL) {

        CONFerr(CONF_F_CONF_LOAD, ERR_R_SYS_LIB);

        return NULL;

    }

    ltmp = CONF_load_bio(conf, in, eline);

    BIO_free(in);

    return ltmp;

}

#ifndef OPENSSL_NO_FP_API

LHASH_OF(CONF_VALUE) *CONF_load_fp(LHASH_OF(CONF_VALUE) *conf, FILE *fp,

                                   long *eline)

{

    BIO *btmp;

    LHASH_OF(CONF_VALUE) *ltmp;

    if (!(btmp = BIO_new_fp(fp, BIO_NOCLOSE))) {

        CONFerr(CONF_F_CONF_LOAD_FP, ERR_R_BUF_LIB);

        return NULL;

    }

    ltmp = CONF_load_bio(conf, btmp, eline);

    BIO_free(btmp);

    return ltmp;

}

#endif

LHASH_OF(CONF_VALUE) *CONF_load_bio(LHASH_OF(CONF_VALUE) *conf, BIO *bp,

                                    long *eline)

{

    CONF ctmp;

    int ret;

    CONF_set_nconf(&ctmp, conf);

    ret = NCONF_load_bio(&ctmp, bp, eline);

    if (ret)

        return ctmp.data;

    return NULL;

}

STACK_OF(CONF_VALUE) *CONF_get_section(LHASH_OF(CONF_VALUE) *conf,

                                       const char *section)

{

    if (conf == NULL) {

        return NULL;

    } else {

        CONF ctmp;

        CONF_set_nconf(&ctmp, conf);

        return NCONF_get_section(&ctmp, section);

    }

}

char *CONF_get_string(LHASH_OF(CONF_VALUE) *conf, const char *group,

                      const char *name)

{

    if (conf == NULL) {

        return NCONF_get_string(NULL, group, name);

    } else {

        CONF ctmp;

        CONF_set_nconf(&ctmp, conf);

        return NCONF_get_string(&ctmp, group, name);

    }

}

long CONF_get_number(LHASH_OF(CONF_VALUE) *conf, const char *group,

                     const char *name)

{

    int status;

    long result = 0;

    if (conf == NULL) {

        status = NCONF_get_number_e(NULL, group, name, &result);

    } else {

        CONF ctmp;

        CONF_set_nconf(&ctmp, conf);

        status = NCONF_get_number_e(&ctmp, group, name, &result);

    }

    if (status == 0) {

        /* This function does not believe in errors... */

        ERR_clear_error();

    }

    return result;

}

void CONF_free(LHASH_OF(CONF_VALUE) *conf)

{

    CONF ctmp;

    CONF_set_nconf(&ctmp, conf);

    NCONF_free_data(&ctmp);

}

#ifndef OPENSSL_NO_FP_API

int CONF_dump_fp(LHASH_OF(CONF_VALUE) *conf, FILE *out)

{

    BIO *btmp;

    int ret;

    if (!(btmp = BIO_new_fp(out, BIO_NOCLOSE))) {

        CONFerr(CONF_F_CONF_DUMP_FP, ERR_R_BUF_LIB);

        return 0;

    }

    ret = CONF_dump_bio(conf, btmp);

    BIO_free(btmp);

    return ret;

}

#endif

int CONF_dump_bio(LHASH_OF(CONF_VALUE) *conf, BIO *out)

{

    CONF ctmp;

    CONF_set_nconf(&ctmp, conf);

    return NCONF_dump_bio(&ctmp, out);

}

/*

 * The following section contains the "New CONF" functions.  They are

 * completely centralised around a new CONF structure that may contain

 * basically anything, but at least a method pointer and a table of data.

 * These functions are also written in terms of the bridge functions used by

 * the "CONF classic" functions, for consistency.

 */

CONF *NCONF_new(CONF_METHOD *meth)

{

    CONF *ret;

    if (meth == NULL)

        meth = NCONF_default();

    ret = meth->create(meth);

    if (ret == NULL) {

        CONFerr(CONF_F_NCONF_NEW, ERR_R_MALLOC_FAILURE);

        return (NULL);

    }

    return ret;

}

void NCONF_free(CONF *conf)

{

    if (conf == NULL)

        return;

    conf->meth->destroy(conf);

}

void NCONF_free_data(CONF *conf)

{

    if (conf == NULL)

        return;

    conf->meth->destroy_data(conf);

}

int NCONF_load(CONF *conf, const char *file, long *eline)

{

    if (conf == NULL) {

        CONFerr(CONF_F_NCONF_LOAD, CONF_R_NO_CONF);

        return 0;

    }

    return conf->meth->load(conf, file, eline);

}

#ifndef OPENSSL_NO_FP_API

int NCONF_load_fp(CONF *conf, FILE *fp, long *eline)

{

    BIO *btmp;

    int ret;

    if (!(btmp = BIO_new_fp(fp, BIO_NOCLOSE))) {

        CONFerr(CONF_F_NCONF_LOAD_FP, ERR_R_BUF_LIB);

        return 0;

    }

    ret = NCONF_load_bio(conf, btmp, eline);

    BIO_free(btmp);

    return ret;

}

#endif

int NCONF_load_bio(CONF *conf, BIO *bp, long *eline)

{

    if (conf == NULL) {

        CONFerr(CONF_F_NCONF_LOAD_BIO, CONF_R_NO_CONF);

        return 0;

    }

    return conf->meth->load_bio(conf, bp, eline);

}

STACK_OF(CONF_VALUE) *NCONF_get_section(const CONF *conf, const char *section)

{

    if (conf == NULL) {

        CONFerr(CONF_F_NCONF_GET_SECTION, CONF_R_NO_CONF);

        return NULL;

    }

    if (section == NULL) {

        CONFerr(CONF_F_NCONF_GET_SECTION, CONF_R_NO_SECTION);

        return NULL;

    }

    return _CONF_get_section_values(conf, section);

}

char *NCONF_get_string(const CONF *conf, const char *group, const char *name)

{

    char *s = _CONF_get_string(conf, group, name);

    /*

     * Since we may get a value from an environment variable even if conf is

     * NULL, let's check the value first

     */

    if (s)

        return s;

    if (conf == NULL) {

        CONFerr(CONF_F_NCONF_GET_STRING,

                CONF_R_NO_CONF_OR_ENVIRONMENT_VARIABLE);

        return NULL;

    }

    CONFerr(CONF_F_NCONF_GET_STRING, CONF_R_NO_VALUE);

    ERR_add_error_data(4, "group=", group, " name=", name);

    return NULL;

}

int NCONF_get_number_e(const CONF *conf, const char *group, const char *name,

                       long *result)

{

    char *str;

    if (result == NULL) {

        CONFerr(CONF_F_NCONF_GET_NUMBER_E, ERR_R_PASSED_NULL_PARAMETER);

        return 0;

    }

    str = NCONF_get_string(conf, group, name);

    if (str == NULL)

        return 0;

    for (*result = 0; conf->meth->is_number(conf, *str);) {

        *result = (*result) * 10 + conf->meth->to_int(conf, *str);

        str++;

    }

    return 1;

}

#ifndef OPENSSL_NO_FP_API

int NCONF_dump_fp(const CONF *conf, FILE *out)

{

    BIO *btmp;

    int ret;

    if (!(btmp = BIO_new_fp(out, BIO_NOCLOSE))) {

        CONFerr(CONF_F_NCONF_DUMP_FP, ERR_R_BUF_LIB);

        return 0;

    }

    ret = NCONF_dump_bio(conf, btmp);

    BIO_free(btmp);

    return ret;

}

#endif

int NCONF_dump_bio(const CONF *conf, BIO *out)

{

    if (conf == NULL) {

        CONFerr(CONF_F_NCONF_DUMP_BIO, CONF_R_NO_CONF);

        return 0;

    }

    return conf->meth->dump(conf, out);

}

/* This function should be avoided */

#if 0

long NCONF_get_number(CONF *conf, char *group, char *name)

{

    int status;

    long ret = 0;

    status = NCONF_get_number_e(conf, group, name, &ret);

    if (status == 0) {

        /* This function does not believe in errors... */

        ERR_get_error();

    }

    return ret;

}

#endif