/* 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)