/* crypto/conf/conf.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.]

  */

  /*

  © Portions copyright (c) 2006 Nokia Corporation.  All rights reserved.

  */

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

 #include <stdio.h>

 #include <string.h>

 #include "cryptlib.h"

 #include <openssl/stack.h>

 #include <openssl/lhash.h>

 #include <openssl/conf.h>

 #include <openssl/conf_api.h>

 #include "conf_def.h"

 #include <openssl/buffer.h>

 #include <openssl/err.h>

 #if (defined(SYMBIAN) && (defined(__WINSCW__) || defined(__WINS__)))

 #include "libcrypto_wsd_macros.h"

 #include "libcrypto_wsd.h"

 #endif

 static char *eat_ws(CONF *conf, char *p);

 static char *eat_alpha_numeric(CONF *conf, char *p);

 static void clear_comments(CONF *conf, char *p);

 static int str_copy(CONF *conf,char *section,char **to, char *from);

 static char *scan_quote(CONF *conf, char *p);

 static char *scan_dquote(CONF *conf, char *p);

 #define scan_esc(conf,p)	(((IS_EOF((conf),(p)[1]))?((p)+1):((p)+2)))

 static CONF *def_create(CONF_METHOD *meth);

 static int def_init_default(CONF *conf);

 static int def_init_WIN32(CONF *conf);

 static int def_destroy(CONF *conf);

 static int def_destroy_data(CONF *conf);

 static int def_load(CONF *conf, const char *name, long *eline);

 static int def_load_bio(CONF *conf, BIO *bp, long *eline);

 static int def_dump(const CONF *conf, BIO *bp);

 static int def_is_number(const CONF *conf, char c);

 static int def_to_int(const CONF *conf, char c);

 const char CONF_def_version[]="CONF_def" OPENSSL_VERSION_PTEXT;

 #ifndef EMULATOR

 static CONF_METHOD default_method = {

 	"OpenSSL default",

 	def_create,

 	def_init_default,

 	def_destroy,

 	def_destroy_data,

 	def_load_bio,

 	def_dump,

 	def_is_number,

 	def_to_int,

 	def_load

 	};

 static CONF_METHOD WIN32_method = {

 	"WIN32",

 	def_create,

 	def_init_WIN32,

 	def_destroy,

 	def_destroy_data,

 	def_load_bio,

 	def_dump,

 	def_is_number,

 	def_to_int,

 	def_load

 	};

 #else

 GET_STATIC_VAR_FROM_TLS(default_method,conf_def,CONF_METHOD)

 #define default_method (*GET_WSD_VAR_NAME(default_method,conf_def, s)())

 const CONF_METHOD temp_s_default_method = {

 	"OpenSSL default",

 	def_create,

 	def_init_default,

 	def_destroy,

 	def_destroy_data,

 	def_load_bio,

 	def_dump,

 	def_is_number,

 	def_to_int,

 	def_load

 	};

 GET_STATIC_VAR_FROM_TLS(WIN32_method,conf_def,CONF_METHOD)

 #define WIN32_method (*GET_WSD_VAR_NAME(WIN32_method,conf_def, s)())

 const CONF_METHOD temp_s_WIN32_method = {

 	"WIN32",

 	def_create,

 	def_init_WIN32,

 	def_destroy,

 	def_destroy_data,

 	def_load_bio,

 	def_dump,

 	def_is_number,

 	def_to_int,

 	def_load

 	};

 #endif	

 EXPORT_C CONF_METHOD *NCONF_default()

 	{

 	return &default_method;

 	}

 CONF_METHOD *NCONF_WIN32()

 	{

 	return &WIN32_method;

 	}

 static CONF *def_create(CONF_METHOD *meth)

 	{

 	CONF *ret;

 	ret = (CONF *)OPENSSL_malloc(sizeof(CONF) + sizeof(unsigned short *));

 	if (ret)

 		if (meth->init(ret) == 0)

 			{

 			OPENSSL_free(ret);

 			ret = NULL;

 			}

 	return ret;

 	}

 static int def_init_default(CONF *conf)

 	{

 	if (conf == NULL)

 		return 0;

 	conf->meth = &default_method;

 	conf->meth_data = (void *)CONF_type_default;

 	conf->data = NULL;

 	return 1;

 	}

 static int def_init_WIN32(CONF *conf)

 	{

 	if (conf == NULL)

 		return 0;

 	conf->meth = &WIN32_method;

 	conf->meth_data = (void *)CONF_type_win32;

 	conf->data = NULL;

 	return 1;

 	}

 static int def_destroy(CONF *conf)

 	{

 	if (def_destroy_data(conf))

 		{

 		OPENSSL_free(conf);

 		return 1;

 		}

 	return 0;

 	}

 static int def_destroy_data(CONF *conf)

 	{

 	if (conf == NULL)

 		return 0;

 	_CONF_free_data(conf);

 	return 1;

 	}

 static int def_load(CONF *conf, const char *name, long *line)

 	{

 	int ret;

 	BIO *in=NULL;

 #ifdef OPENSSL_SYS_VMS

 	in=BIO_new_file(name, "r");

 #else

 	in=BIO_new_file(name, "rb");

 #endif

 	if (in == NULL)

 		{

 		if (ERR_GET_REASON(ERR_peek_last_error()) == BIO_R_NO_SUCH_FILE)

 			CONFerr(CONF_F_DEF_LOAD,CONF_R_NO_SUCH_FILE);

 		else

 			CONFerr(CONF_F_DEF_LOAD,ERR_R_SYS_LIB);

 		return 0;

 		}

 	ret = def_load_bio(conf, in, line);

 	BIO_free(in);

 	return ret;

 	}

 static int def_load_bio(CONF *conf, BIO *in, long *line)

 	{

 /* The macro BUFSIZE conflicts with a system macro in VxWorks */

 #define CONFBUFSIZE	512

 	int bufnum=0,i,ii;

 	BUF_MEM *buff=NULL;

 	char *s,*p,*end;

 	int again,n;

 	long eline=0;

 	char btmp[DECIMAL_SIZE(eline)+1];

 	CONF_VALUE *v=NULL,*tv;

 	CONF_VALUE *sv=NULL;

 	char *section=NULL,*buf;

 	STACK_OF(CONF_VALUE) *section_sk=NULL,*ts;

 	char *start,*psection,*pname;

 	void *h = (void *)(conf->data);

 	if ((buff=BUF_MEM_new()) == NULL)

 		{

 		CONFerr(CONF_F_DEF_LOAD_BIO,ERR_R_BUF_LIB);

 		goto err;

 		}

 	section=(char *)OPENSSL_malloc(10);

 	if (section == NULL)

 		{

 		CONFerr(CONF_F_DEF_LOAD_BIO,ERR_R_MALLOC_FAILURE);

 		goto err;

 		}

 	BUF_strlcpy(section,"default",10);

 	if (_CONF_new_data(conf) == 0)

 		{

 		CONFerr(CONF_F_DEF_LOAD_BIO,ERR_R_MALLOC_FAILURE);

 		goto err;

 		}

 	sv=_CONF_new_section(conf,section);

 	if (sv == NULL)

 		{

 		CONFerr(CONF_F_DEF_LOAD_BIO,

 					CONF_R_UNABLE_TO_CREATE_NEW_SECTION);

 		goto err;

 		}

 	section_sk=(STACK_OF(CONF_VALUE) *)sv->value;

 	bufnum=0;

 	again=0;

 	for (;;)

 		{

 		if (!BUF_MEM_grow(buff,bufnum+CONFBUFSIZE))

 			{

 			CONFerr(CONF_F_DEF_LOAD_BIO,ERR_R_BUF_LIB);

 			goto err;

 			}

 		p= &(buff->data[bufnum]);

 		*p='\0';

 		BIO_gets(in, p, CONFBUFSIZE-1);

 		p[CONFBUFSIZE-1]='\0';

 		ii=i=strlen(p);

 		if (i == 0 && !again) break;

 		again=0;

 		while (i > 0)

 			{

 			if ((p[i-1] != '\r') && (p[i-1] != '\n'))

 				break;

 			else

 				i--;

 			}

 		/* we removed some trailing stuff so there is a new

 		 * line on the end. */

 		if (ii && i == ii)

 			again=1; /* long line */

 		else

 			{

 			p[i]='\0';

 			eline++; /* another input line */

 			}

 		/* we now have a line with trailing \r\n removed */

 		/* i is the number of bytes */

 		bufnum+=i;

 		v=NULL;

 		/* check for line continuation */

 		if (bufnum >= 1)

 			{

 			/* If we have bytes and the last char '\\' and

 			 * second last char is not '\\' */

 			p= &(buff->data[bufnum-1]);

 			if (IS_ESC(conf,p[0]) &&

 				((bufnum <= 1) || !IS_ESC(conf,p[-1])))

 				{

 				bufnum--;

 				again=1;

 				}

 			}

 		if (again) continue;

 		bufnum=0;

 		buf=buff->data;

 		clear_comments(conf, buf);

 		n=strlen(buf);

 		s=eat_ws(conf, buf);

 		if (IS_EOF(conf,*s)) continue; /* blank line */

 		if (*s == '[')

 			{

 			char *ss;

 			s++;

 			start=eat_ws(conf, s);

 			ss=start;

 again:

 			end=eat_alpha_numeric(conf, ss);

 			p=eat_ws(conf, end);

 			if (*p != ']')

 				{

 				if (*p != '\0')

 					{

 					ss=p;

 					goto again;

 					}

 				CONFerr(CONF_F_DEF_LOAD_BIO,

 					CONF_R_MISSING_CLOSE_SQUARE_BRACKET);

 				goto err;

 				}

 			*end='\0';

 			if (!str_copy(conf,NULL,&section,start)) goto err;

 			if ((sv=_CONF_get_section(conf,section)) == NULL)

 				sv=_CONF_new_section(conf,section);

 			if (sv == NULL)

 				{

 				CONFerr(CONF_F_DEF_LOAD_BIO,

 					CONF_R_UNABLE_TO_CREATE_NEW_SECTION);

 				goto err;

 				}

 			section_sk=(STACK_OF(CONF_VALUE) *)sv->value;

 			continue;

 			}

 		else

 			{

 			pname=s;

 			psection=NULL;

 			end=eat_alpha_numeric(conf, s);

 			if ((end[0] == ':') && (end[1] == ':'))

 				{

 				*end='\0';

 				end+=2;

 				psection=pname;

 				pname=end;

 				end=eat_alpha_numeric(conf, end);

 				}

 			p=eat_ws(conf, end);

 			if (*p != '=')

 				{

 				CONFerr(CONF_F_DEF_LOAD_BIO,

 						CONF_R_MISSING_EQUAL_SIGN);

 				goto err;

 				}

 			*end='\0';

 			p++;

 			start=eat_ws(conf, p);

 			while (!IS_EOF(conf,*p))

 				p++;

 			p--;

 			while ((p != start) && (IS_WS(conf,*p)))

 				p--;

 			p++;

 			*p='\0';

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

 				{

 				CONFerr(CONF_F_DEF_LOAD_BIO,

 							ERR_R_MALLOC_FAILURE);

 				goto err;

 				}

 			if (psection == NULL) psection=section;

 			v->name=(char *)OPENSSL_malloc(strlen(pname)+1);

 			v->value=NULL;

 			if (v->name == NULL)

 				{

 				CONFerr(CONF_F_DEF_LOAD_BIO,

 							ERR_R_MALLOC_FAILURE);

 				goto err;

 				}

 			BUF_strlcpy(v->name,pname,strlen(pname)+1);

 			if (!str_copy(conf,psection,&(v->value),start)) goto err;

 			if (strcmp(psection,section) != 0)

 				{

 				if ((tv=_CONF_get_section(conf,psection))

 					== NULL)

 					tv=_CONF_new_section(conf,psection);

 				if (tv == NULL)

 					{

 					CONFerr(CONF_F_DEF_LOAD_BIO,

 					   CONF_R_UNABLE_TO_CREATE_NEW_SECTION);

 					goto err;

 					}

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

 				}

 			else

 				{

 				tv=sv;

 				ts=section_sk;

 				}

 #if 1

 			if (_CONF_add_string(conf, tv, v) == 0)

 				{

 				CONFerr(CONF_F_DEF_LOAD_BIO,

 							ERR_R_MALLOC_FAILURE);

 				goto err;

 				}

 #else

 			v->section=tv->section;	

 			if (!sk_CONF_VALUE_push(ts,v))

 				{

 				CONFerr(CONF_F_DEF_LOAD_BIO,

 							ERR_R_MALLOC_FAILURE);

 				goto err;

 				}

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

 			if (vv != NULL)

 				{

 				sk_CONF_VALUE_delete_ptr(ts,vv);

 				OPENSSL_free(vv->name);

 				OPENSSL_free(vv->value);

 				OPENSSL_free(vv);

 				}

 #endif

 			v=NULL;

 			}

 		}

 	if (buff != NULL) BUF_MEM_free(buff);

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

 	return(1);

 err:

 	if (buff != NULL) BUF_MEM_free(buff);

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

 	if (line != NULL) *line=eline;

 	BIO_snprintf(btmp,sizeof btmp,"%ld",eline);

 	ERR_add_error_data(2,"line ",btmp);

 	if ((h != conf->data) && (conf->data != NULL))

 		{

 		CONF_free(conf->data);

 		conf->data=NULL;

 		}

 	if (v != NULL)

 		{

 		if (v->name != NULL) OPENSSL_free(v->name);

 		if (v->value != NULL) OPENSSL_free(v->value);

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

 		}

 	return(0);

 	}

 static void clear_comments(CONF *conf, char *p)

 	{

 	char *to;

 	to=p;

 	for (;;)

 		{

 		if (IS_FCOMMENT(conf,*p))

 			{

 			*p='\0';

 			return;

 			}

 		if (!IS_WS(conf,*p))

 			{

 			break;

 			}

 		p++;

 		}

 	for (;;)

 		{

 		if (IS_COMMENT(conf,*p))

 			{

 			*p='\0';

 			return;

 			}

 		if (IS_DQUOTE(conf,*p))

 			{

 			p=scan_dquote(conf, p);

 			continue;

 			}

 		if (IS_QUOTE(conf,*p))

 			{

 			p=scan_quote(conf, p);

 			continue;

 			}

 		if (IS_ESC(conf,*p))

 			{

 			p=scan_esc(conf,p);

 			continue;

 			}

 		if (IS_EOF(conf,*p))

 			return;

 		else

 			p++;

 		}

 	}

 static int str_copy(CONF *conf, char *section, char **pto, char *from)

 	{

 	int q,r,rr=0,to=0,len=0;

 	char *s,*e,*rp,*p,*rrp,*np,*cp,v;

 	BUF_MEM *buf;

 	if ((buf=BUF_MEM_new()) == NULL) return(0);

 	len=strlen(from)+1;

 	if (!BUF_MEM_grow(buf,len)) goto err;

 	for (;;)

 		{

 		if (IS_QUOTE(conf,*from))

 			{

 			q= *from;

 			from++;

 			while (!IS_EOF(conf,*from) && (*from != q))

 				{

 				if (IS_ESC(conf,*from))

 					{

 					from++;

 					if (IS_EOF(conf,*from)) break;

 					}

 				buf->data[to++]= *(from++);

 				}

 			if (*from == q) from++;

 			}

 		else if (IS_DQUOTE(conf,*from))

 			{

 			q= *from;

 			from++;

 			while (!IS_EOF(conf,*from))

 				{

 				if (*from == q)

 					{

 					if (*(from+1) == q)

 						{

 						from++;

 						}

 					else

 						{

 						break;

 						}

 					}

 				buf->data[to++]= *(from++);

 				}

 			if (*from == q) from++;

 			}

 		else if (IS_ESC(conf,*from))

 			{

 			from++;

 			v= *(from++);

 			if (IS_EOF(conf,v)) break;

 			else if (v == 'r') v='\r';

 			else if (v == 'n') v='\n';

 			else if (v == 'b') v='\b';

 			else if (v == 't') v='\t';

 			buf->data[to++]= v;

 			}

 		else if (IS_EOF(conf,*from))

 			break;

 		else if (*from == '$')

 			{

 			/* try to expand it */

 			rrp=NULL;

 			s= &(from[1]);

 			if (*s == '{')

 				q='}';

 			else if (*s == '(')

 				q=')';

 			else q=0;

 			if (q) s++;

 			cp=section;

 			e=np=s;

 			while (IS_ALPHA_NUMERIC(conf,*e))

 				e++;

 			if ((e[0] == ':') && (e[1] == ':'))

 				{

 				cp=np;

 				rrp=e;

 				rr= *e;

 				*rrp='\0';

 				e+=2;

 				np=e;

 				while (IS_ALPHA_NUMERIC(conf,*e))

 					e++;

 				}

 			r= *e;

 			*e='\0';

 			rp=e;

 			if (q)

 				{

 				if (r != q)

 					{

 					CONFerr(CONF_F_STR_COPY,CONF_R_NO_CLOSE_BRACE);

 					goto err;

 					}

 				e++;

 				}

 			/* So at this point we have

 			 * np which is the start of the name string which is

 			 *   '\0' terminated. 

 			 * cp which is the start of the section string which is

 			 *   '\0' terminated.

 			 * e is the 'next point after'.

 			 * r and rr are the chars replaced by the '\0'

 			 * rp and rrp is where 'r' and 'rr' came from.

 			 */

 			p=_CONF_get_string(conf,cp,np);

 			if (rrp != NULL) *rrp=rr;

 			*rp=r;

 			if (p == NULL)

 				{

 				CONFerr(CONF_F_STR_COPY,CONF_R_VARIABLE_HAS_NO_VALUE);

 				goto err;

 				}

 			BUF_MEM_grow_clean(buf,(strlen(p)+buf->length-(e-from)));

 			while (*p)

 				buf->data[to++]= *(p++);

 			/* Since we change the pointer 'from', we also have

 			   to change the perceived length of the string it

 			   points at.  /RL */

 			len -= e-from;

 			from=e;

 			/* In case there were no braces or parenthesis around

 			   the variable reference, we have to put back the

 			   character that was replaced with a '\0'.  /RL */

 			*rp = r;

 			}

 		else

 			buf->data[to++]= *(from++);

 		}

 	buf->data[to]='\0';

 	if (*pto != NULL) OPENSSL_free(*pto);

 	*pto=buf->data;

 	OPENSSL_free(buf);

 	return(1);

 err:

 	if (buf != NULL) BUF_MEM_free(buf);

 	return(0);

 	}

 static char *eat_ws(CONF *conf, char *p)

 	{

 	while (IS_WS(conf,*p) && (!IS_EOF(conf,*p)))

 		p++;

 	return(p);

 	}

 static char *eat_alpha_numeric(CONF *conf, char *p)

 	{

 	for (;;)

 		{

 		if (IS_ESC(conf,*p))

 			{

 			p=scan_esc(conf,p);

 			continue;

 			}

 		if (!IS_ALPHA_NUMERIC_PUNCT(conf,*p))

 			return(p);

 		p++;

 		}

 	}

 static char *scan_quote(CONF *conf, char *p)

 	{

 	int q= *p;

 	p++;

 	while (!(IS_EOF(conf,*p)) && (*p != q))

 		{

 		if (IS_ESC(conf,*p))

 			{

 			p++;

 			if (IS_EOF(conf,*p)) return(p);

 			}

 		p++;

 		}

 	if (*p == q) p++;

 	return(p);

 	}

 static char *scan_dquote(CONF *conf, char *p)

 	{

 	int q= *p;

 	p++;

 	while (!(IS_EOF(conf,*p)))

 		{

 		if (*p == q)

 			{

 			if (*(p+1) == q)

 				{

 				p++;

 				}

 			else

 				{

 				break;

 				}

 			}

 		p++;

 		}

 	if (*p == q) p++;

 	return(p);

 	}

 static void dump_value(CONF_VALUE *a, BIO *out)

 	{

 	if (a->name)

 		BIO_printf(out, "[%s] %s=%s\n", a->section, a->name, a->value);

 	else

 		BIO_printf(out, "[[%s]]\n", a->section);

 	}

 static IMPLEMENT_LHASH_DOALL_ARG_FN(dump_value, CONF_VALUE *, BIO *)

 static int def_dump(const CONF *conf, BIO *out)

 	{

 	lh_doall_arg(conf->data, LHASH_DOALL_ARG_FN(dump_value), out);

 	return 1;

 	}

 static int def_is_number(const CONF *conf, char c)

 	{

 	return IS_NUMBER(conf,c);

 	}

 static int def_to_int(const CONF *conf, char c)

 	{

 	return c - '0';

 	}