/* 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 <string.h>

#include <openssl/conf.h>

#include <openssl/conf_api.h>

#include "e_os.h"

static void value_free_hash(CONF_VALUE *a, LHASH *conf);

static void value_free_stack(CONF_VALUE *a,LHASH *conf);

static IMPLEMENT_LHASH_DOALL_ARG_FN(value_free_hash, CONF_VALUE *, LHASH *)

static IMPLEMENT_LHASH_DOALL_ARG_FN(value_free_stack, CONF_VALUE *, LHASH *)

/* We don't use function pointer casting or wrapper functions - but cast each

 * callback parameter inside the callback functions. */

/* static unsigned long hash(CONF_VALUE *v); */

static unsigned long hash(const void *v_void);

/* static int cmp_conf(CONF_VALUE *a,CONF_VALUE *b); */

static int cmp_conf(const void *a_void,const void *b_void);

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

EXPORT_C 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=(CONF_VALUE *)lh_retrieve(conf->data,&vv);

	return(v);

	}

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

EXPORT_C 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);

	}

EXPORT_C 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 = (CONF_VALUE *)lh_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;

	}

EXPORT_C 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=(CONF_VALUE *)lh_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=(CONF_VALUE *)lh_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. */

EXPORT_C 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

EXPORT_C int _CONF_new_data(CONF *conf)

	{

	if (conf == NULL)

		{

		return 0;

		}

	if (conf->data == NULL)

		if ((conf->data = lh_new(hash, cmp_conf)) == NULL)

			{

			return 0;

			}

	return 1;

	}

EXPORT_C void _CONF_free_data(CONF *conf)

	{

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

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

				  * works as expected */

	lh_doall_arg(conf->data, LHASH_DOALL_ARG_FN(value_free_hash),

			conf->data);

	/* We now have only 'section' entries in the hash table.

	 * Due to problems with */

	lh_doall_arg(conf->data, LHASH_DOALL_ARG_FN(value_free_stack),

			conf->data);

	lh_free(conf->data);

	}

static void value_free_hash(CONF_VALUE *a, LHASH *conf)

	{

	if (a->name != NULL)

		{

		a=(CONF_VALUE *)lh_delete(conf,a);

		}

	}

static void value_free_stack(CONF_VALUE *a, LHASH *conf)

	{

	CONF_VALUE *vv;

	STACK *sk;

	int i;

	if (a->name != NULL) return;

	sk=(STACK *)a->value;

	for (i=sk_num(sk)-1; i>=0; i--)

		{

		vv=(CONF_VALUE *)sk_value(sk,i);

		OPENSSL_free(vv->value);

		OPENSSL_free(vv->name);

		OPENSSL_free(vv);

		}

	if (sk != NULL) sk_free(sk);

	OPENSSL_free(a->section);

	OPENSSL_free(a);

	}

/* static unsigned long hash(CONF_VALUE *v) */

static unsigned long hash(const void *v_void)

	{

	CONF_VALUE *v = (CONF_VALUE *)v_void;

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

	}

/* static int cmp_conf(CONF_VALUE *a, CONF_VALUE *b) */

static int cmp_conf(const void *a_void,const  void *b_void)

	{

	int i;

	CONF_VALUE *a = (CONF_VALUE *)a_void;

	CONF_VALUE *b = (CONF_VALUE *)b_void;

	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);

	}

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

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

	{

	STACK *sk=NULL;

	int ok=0,i;

	CONF_VALUE *v=NULL,*vv;

	if ((sk=sk_new_null()) == NULL)

		goto err;

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

		goto err;

	i=strlen(section)+1;

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

		goto err;

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

	v->name=NULL;

	v->value=(char *)sk;

	vv=(CONF_VALUE *)lh_insert(conf->data,v);

	assert(vv == NULL);

	ok=1;

err:

	if (!ok)

		{

		if (sk != NULL) sk_free(sk);

		if (v != NULL) OPENSSL_free(v);

		v=NULL;

		}

	return(v);

	}

IMPLEMENT_STACK_OF(CONF_VALUE)