/* conf_api.c */

/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)

 * All rights reserved.

 *

 * This package is an SSL implementation written

 * by Eric Young (eay@cryptsoft.com).

 * The implementation was written so as to conform with Netscapes SSL.

 *

 * This library is free for commercial and non-commercial use as long as

 * the following conditions are aheared to.  The following conditions

 * apply to all code found in this distribution, be it the RC4, RSA,

 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation

 * included with this distribution is covered by the same copyright terms

 * except that the holder is Tim Hudson (tjh@cryptsoft.com).

 *

 * Copyright remains Eric Young's, and as such any Copyright notices in

 * the code are not to be removed.

 * If this package is used in a product, Eric Young should be given attribution

 * as the author of the parts of the library used.

 * This can be in the form of a textual message at program startup or

 * in documentation (online or textual) provided with the package.

 *

 * 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 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 acknowledgement:

 *    "This product includes cryptographic software written by

 *     Eric Young (eay@cryptsoft.com)"

 *    The word 'cryptographic' can be left out if the rouines from the library

 *    being used are not cryptographic related :-).

 * 4. If you include any Windows specific code (or a derivative thereof) from

 *    the apps directory (application code) you must include an acknowledgement:

 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"

 *

 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND

 * ANY EXPRESS 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 AUTHOR OR 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.

 *

 * The licence and distribution terms for any publically available version or

 * derivative of this code cannot be changed.  i.e. this code cannot simply be

 * copied and put under another distribution licence

 * [including the GNU Public Licence.]

 */

/* Part of the code in here was originally in conf.c, which is now removed */

#ifndef CONF_DEBUG

# undef NDEBUG                  /* avoid conflicting definitions */

# define NDEBUG

#endif

#include <assert.h>

#include <stdlib.h>

#include <string.h>

#include <openssl/conf.h>

#include <openssl/conf_api.h>

#include "e_os.h"

static void value_free_hash_doall_arg(CONF_VALUE *a,

                                      LHASH_OF(CONF_VALUE) *conf);

static void value_free_stack_doall(CONF_VALUE *a);

static IMPLEMENT_LHASH_DOALL_ARG_FN(value_free_hash, CONF_VALUE,

                                    LHASH_OF(CONF_VALUE))

static IMPLEMENT_LHASH_DOALL_FN(value_free_stack, CONF_VALUE)

/* Up until OpenSSL 0.9.5a, this was get_section */

CONF_VALUE *_CONF_get_section(const CONF *conf, const char *section)

{

    CONF_VALUE *v, vv;

    if ((conf == NULL) || (section == NULL))

        return (NULL);

    vv.name = NULL;

    vv.section = (char *)section;

    v = lh_CONF_VALUE_retrieve(conf->data, &vv);

    return (v);

}

/* Up until OpenSSL 0.9.5a, this was CONF_get_section */

STACK_OF(CONF_VALUE) *_CONF_get_section_values(const CONF *conf,

                                               const char *section)

{

    CONF_VALUE *v;

    v = _CONF_get_section(conf, section);

    if (v != NULL)

        return ((STACK_OF(CONF_VALUE) *)v->value);

    else

        return (NULL);

}

int _CONF_add_string(CONF *conf, CONF_VALUE *section, CONF_VALUE *value)

{

    CONF_VALUE *v = NULL;

    STACK_OF(CONF_VALUE) *ts;

    ts = (STACK_OF(CONF_VALUE) *)section->value;

    value->section = section->section;

    if (!sk_CONF_VALUE_push(ts, value)) {

        return 0;

    }

    v = lh_CONF_VALUE_insert(conf->data, value);

    if (v != NULL) {

        (void)sk_CONF_VALUE_delete_ptr(ts, v);

        OPENSSL_free(v->name);

        OPENSSL_free(v->value);

        OPENSSL_free(v);

    }

    return 1;

}

char *_CONF_get_string(const CONF *conf, const char *section,

                       const char *name)

{

    CONF_VALUE *v, vv;

    char *p;

    if (name == NULL)

        return (NULL);

    if (conf != NULL) {

        if (section != NULL) {

            vv.name = (char *)name;

            vv.section = (char *)section;

            v = lh_CONF_VALUE_retrieve(conf->data, &vv);

            if (v != NULL)

                return (v->value);

            if (strcmp(section, "ENV") == 0) {

                p = getenv(name);

                if (p != NULL)

                    return (p);

            }

        }

        vv.section = "default";

        vv.name = (char *)name;

        v = lh_CONF_VALUE_retrieve(conf->data, &vv);

        if (v != NULL)

            return (v->value);

        else

            return (NULL);

    } else

        return (getenv(name));

}

#if 0                           /* There's no way to provide error checking

                                 * with this function, so force implementors

                                 * of the higher levels to get a string and

                                 * read the number themselves. */

long _CONF_get_number(CONF *conf, char *section, char *name)

{

    char *str;

    long ret = 0;

    str = _CONF_get_string(conf, section, name);

    if (str == NULL)

        return (0);

    for (;;) {

        if (conf->meth->is_number(conf, *str))

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

        else

            return (ret);

        str++;

    }

}

#endif

static unsigned long conf_value_hash(const CONF_VALUE *v)

{

    return (lh_strhash(v->section) << 2) ^ lh_strhash(v->name);

}

static IMPLEMENT_LHASH_HASH_FN(conf_value, CONF_VALUE)

static int conf_value_cmp(const CONF_VALUE *a, const CONF_VALUE *b)

{

    int i;

    if (a->section != b->section) {

        i = strcmp(a->section, b->section);

        if (i)

            return (i);

    }

    if ((a->name != NULL) && (b->name != NULL)) {

        i = strcmp(a->name, b->name);

        return (i);

    } else if (a->name == b->name)

        return (0);

    else

        return ((a->name == NULL) ? -1 : 1);

}

static IMPLEMENT_LHASH_COMP_FN(conf_value, CONF_VALUE)

int _CONF_new_data(CONF *conf)

{

    if (conf == NULL) {

        return 0;

    }

    if (conf->data == NULL)

        if ((conf->data = lh_CONF_VALUE_new()) == NULL) {

            return 0;

        }

    return 1;

}

void _CONF_free_data(CONF *conf)

{

    if (conf == NULL || conf->data == NULL)

        return;

    lh_CONF_VALUE_down_load(conf->data) = 0; /* evil thing to make * sure the

                                              * 'OPENSSL_free()' works as *

                                              * expected */

    lh_CONF_VALUE_doall_arg(conf->data,

                            LHASH_DOALL_ARG_FN(value_free_hash),

                            LHASH_OF(CONF_VALUE), conf->data);

    /*

     * We now have only 'section' entries in the hash table. Due to problems

     * with

     */

    lh_CONF_VALUE_doall(conf->data, LHASH_DOALL_FN(value_free_stack));

    lh_CONF_VALUE_free(conf->data);

}

static void value_free_hash_doall_arg(CONF_VALUE *a,

                                      LHASH_OF(CONF_VALUE) *conf)

{

    if (a->name != NULL)

        (void)lh_CONF_VALUE_delete(conf, a);

}

static void value_free_stack_doall(CONF_VALUE *a)

{

    CONF_VALUE *vv;

    STACK_OF(CONF_VALUE) *sk;

    int i;

    if (a->name != NULL)

        return;

    sk = (STACK_OF(CONF_VALUE) *)a->value;

    for (i = sk_CONF_VALUE_num(sk) - 1; i >= 0; i--) {

        vv = sk_CONF_VALUE_value(sk, i);

        OPENSSL_free(vv->value);

        OPENSSL_free(vv->name);

        OPENSSL_free(vv);

    }

    if (sk != NULL)

        sk_CONF_VALUE_free(sk);

    OPENSSL_free(a->section);

    OPENSSL_free(a);

}

/* Up until OpenSSL 0.9.5a, this was new_section */

CONF_VALUE *_CONF_new_section(CONF *conf, const char *section)

{

    STACK_OF(CONF_VALUE) *sk = NULL;

    int ok = 0, i;

    CONF_VALUE *v = NULL, *vv;

    if ((sk = sk_CONF_VALUE_new_null()) == NULL)

        goto err;

    if ((v = OPENSSL_malloc(sizeof(CONF_VALUE))) == NULL)

        goto err;

    i = strlen(section) + 1;

    if ((v->section = OPENSSL_malloc(i)) == NULL)

        goto err;

    memcpy(v->section, section, i);

    v->name = NULL;

    v->value = (char *)sk;

    vv = lh_CONF_VALUE_insert(conf->data, v);

    OPENSSL_assert(vv == NULL);

    ok = 1;

 err:

    if (!ok) {

        if (sk != NULL)

            sk_CONF_VALUE_free(sk);

        if (v != NULL)

            OPENSSL_free(v);

        v = NULL;

    }

    return (v);

}

IMPLEMENT_STACK_OF(CONF_VALUE)