/* 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';

	}