1/* crypto/conf/conf.c */
2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to.  The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 *    notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 *    notice, this list of conditions and the following disclaimer in the
30 *    documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 *    must display the following acknowledgement:
33 *    "This product includes cryptographic software written by
34 *     Eric Young (eay@cryptsoft.com)"
35 *    The word 'cryptographic' can be left out if the rouines from the library
36 *    being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 *    the apps directory (application code) you must include an acknowledgement:
39 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed.  i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58
59/* Part of the code in here was originally in conf.c, which is now removed */
60
61#include <stdio.h>
62#include <string.h>
63#include <openssl/stack.h>
64#include <openssl/lhash.h>
65#include <openssl/conf.h>
66#include <openssl/conf_api.h>
67#include "conf_def.h"
68#include <openssl/buffer.h>
69#include <openssl/err.h>
70#include "cryptlib.h"
71
72static char *eat_ws(CONF *conf, char *p);
73static char *eat_alpha_numeric(CONF *conf, char *p);
74static void clear_comments(CONF *conf, char *p);
75static int str_copy(CONF *conf,char *section,char **to, char *from);
76static char *scan_quote(CONF *conf, char *p);
77static char *scan_dquote(CONF *conf, char *p);
78#define scan_esc(conf,p)	(((IS_EOF((conf),(p)[1]))?((p)+1):((p)+2)))
79
80static CONF *def_create(CONF_METHOD *meth);
81static int def_init_default(CONF *conf);
82static int def_init_WIN32(CONF *conf);
83static int def_destroy(CONF *conf);
84static int def_destroy_data(CONF *conf);
85static int def_load(CONF *conf, const char *name, long *eline);
86static int def_load_bio(CONF *conf, BIO *bp, long *eline);
87static int def_dump(const CONF *conf, BIO *bp);
88static int def_is_number(const CONF *conf, char c);
89static int def_to_int(const CONF *conf, char c);
90
91const char *CONF_def_version="CONF_def" OPENSSL_VERSION_PTEXT;
92
93static CONF_METHOD default_method = {
94	"OpenSSL default",
95	def_create,
96	def_init_default,
97	def_destroy,
98	def_destroy_data,
99	def_load_bio,
100	def_dump,
101	def_is_number,
102	def_to_int,
103	def_load
104	};
105
106static CONF_METHOD WIN32_method = {
107	"WIN32",
108	def_create,
109	def_init_WIN32,
110	def_destroy,
111	def_destroy_data,
112	def_load_bio,
113	def_dump,
114	def_is_number,
115	def_to_int,
116	def_load
117	};
118
119CONF_METHOD *NCONF_default()
120	{
121	return &default_method;
122	}
123CONF_METHOD *NCONF_WIN32()
124	{
125	return &WIN32_method;
126	}
127
128static CONF *def_create(CONF_METHOD *meth)
129	{
130	CONF *ret;
131
132	ret = (CONF *)OPENSSL_malloc(sizeof(CONF) + sizeof(unsigned short *));
133	if (ret)
134		if (meth->init(ret) == 0)
135			{
136			OPENSSL_free(ret);
137			ret = NULL;
138			}
139	return ret;
140	}
141
142static int def_init_default(CONF *conf)
143	{
144	if (conf == NULL)
145		return 0;
146
147	conf->meth = &default_method;
148	conf->meth_data = (void *)CONF_type_default;
149	conf->data = NULL;
150
151	return 1;
152	}
153
154static int def_init_WIN32(CONF *conf)
155	{
156	if (conf == NULL)
157		return 0;
158
159	conf->meth = &WIN32_method;
160	conf->meth_data = (void *)CONF_type_win32;
161	conf->data = NULL;
162
163	return 1;
164	}
165
166static int def_destroy(CONF *conf)
167	{
168	if (def_destroy_data(conf))
169		{
170		OPENSSL_free(conf);
171		return 1;
172		}
173	return 0;
174	}
175
176static int def_destroy_data(CONF *conf)
177	{
178	if (conf == NULL)
179		return 0;
180	_CONF_free_data(conf);
181	return 1;
182	}
183
184static int def_load(CONF *conf, const char *name, long *line)
185	{
186	int ret;
187	BIO *in=NULL;
188
189#ifdef OPENSSL_SYS_VMS
190	in=BIO_new_file(name, "r");
191#else
192	in=BIO_new_file(name, "rb");
193#endif
194	if (in == NULL)
195		{
196		if (ERR_GET_REASON(ERR_peek_last_error()) == BIO_R_NO_SUCH_FILE)
197			CONFerr(CONF_F_CONF_LOAD,CONF_R_NO_SUCH_FILE);
198		else
199			CONFerr(CONF_F_CONF_LOAD,ERR_R_SYS_LIB);
200		return 0;
201		}
202
203	ret = def_load_bio(conf, in, line);
204	BIO_free(in);
205
206	return ret;
207	}
208
209static int def_load_bio(CONF *conf, BIO *in, long *line)
210	{
211/* The macro BUFSIZE conflicts with a system macro in VxWorks */
212#define CONFBUFSIZE	512
213	int bufnum=0,i,ii;
214	BUF_MEM *buff=NULL;
215	char *s,*p,*end;
216	int again,n;
217	long eline=0;
218	char btmp[DECIMAL_SIZE(eline)+1];
219	CONF_VALUE *v=NULL,*tv;
220	CONF_VALUE *sv=NULL;
221	char *section=NULL,*buf;
222	STACK_OF(CONF_VALUE) *section_sk=NULL,*ts;
223	char *start,*psection,*pname;
224	void *h = (void *)(conf->data);
225
226	if ((buff=BUF_MEM_new()) == NULL)
227		{
228		CONFerr(CONF_F_CONF_LOAD_BIO,ERR_R_BUF_LIB);
229		goto err;
230		}
231
232	section=(char *)OPENSSL_malloc(10);
233	if (section == NULL)
234		{
235		CONFerr(CONF_F_CONF_LOAD_BIO,ERR_R_MALLOC_FAILURE);
236		goto err;
237		}
238	BUF_strlcpy(section,"default",10);
239
240	if (_CONF_new_data(conf) == 0)
241		{
242		CONFerr(CONF_F_CONF_LOAD_BIO,ERR_R_MALLOC_FAILURE);
243		goto err;
244		}
245
246	sv=_CONF_new_section(conf,section);
247	if (sv == NULL)
248		{
249		CONFerr(CONF_F_CONF_LOAD_BIO,
250					CONF_R_UNABLE_TO_CREATE_NEW_SECTION);
251		goto err;
252		}
253	section_sk=(STACK_OF(CONF_VALUE) *)sv->value;
254
255	bufnum=0;
256	again=0;
257	for (;;)
258		{
259		if (!BUF_MEM_grow(buff,bufnum+CONFBUFSIZE))
260			{
261			CONFerr(CONF_F_CONF_LOAD_BIO,ERR_R_BUF_LIB);
262			goto err;
263			}
264		p= &(buff->data[bufnum]);
265		*p='\0';
266		BIO_gets(in, p, CONFBUFSIZE-1);
267		p[CONFBUFSIZE-1]='\0';
268		ii=i=strlen(p);
269		if (i == 0 && !again) break;
270		again=0;
271		while (i > 0)
272			{
273			if ((p[i-1] != '\r') && (p[i-1] != '\n'))
274				break;
275			else
276				i--;
277			}
278		/* we removed some trailing stuff so there is a new
279		 * line on the end. */
280		if (ii && i == ii)
281			again=1; /* long line */
282		else
283			{
284			p[i]='\0';
285			eline++; /* another input line */
286			}
287
288		/* we now have a line with trailing \r\n removed */
289
290		/* i is the number of bytes */
291		bufnum+=i;
292
293		v=NULL;
294		/* check for line continuation */
295		if (bufnum >= 1)
296			{
297			/* If we have bytes and the last char '\\' and
298			 * second last char is not '\\' */
299			p= &(buff->data[bufnum-1]);
300			if (IS_ESC(conf,p[0]) &&
301				((bufnum <= 1) || !IS_ESC(conf,p[-1])))
302				{
303				bufnum--;
304				again=1;
305				}
306			}
307		if (again) continue;
308		bufnum=0;
309		buf=buff->data;
310
311		clear_comments(conf, buf);
312		n=strlen(buf);
313		s=eat_ws(conf, buf);
314		if (IS_EOF(conf,*s)) continue; /* blank line */
315		if (*s == '[')
316			{
317			char *ss;
318
319			s++;
320			start=eat_ws(conf, s);
321			ss=start;
322again:
323			end=eat_alpha_numeric(conf, ss);
324			p=eat_ws(conf, end);
325			if (*p != ']')
326				{
327				if (*p != '\0')
328					{
329					ss=p;
330					goto again;
331					}
332				CONFerr(CONF_F_CONF_LOAD_BIO,
333					CONF_R_MISSING_CLOSE_SQUARE_BRACKET);
334				goto err;
335				}
336			*end='\0';
337			if (!str_copy(conf,NULL,&section,start)) goto err;
338			if ((sv=_CONF_get_section(conf,section)) == NULL)
339				sv=_CONF_new_section(conf,section);
340			if (sv == NULL)
341				{
342				CONFerr(CONF_F_CONF_LOAD_BIO,
343					CONF_R_UNABLE_TO_CREATE_NEW_SECTION);
344				goto err;
345				}
346			section_sk=(STACK_OF(CONF_VALUE) *)sv->value;
347			continue;
348			}
349		else
350			{
351			pname=s;
352			psection=NULL;
353			end=eat_alpha_numeric(conf, s);
354			if ((end[0] == ':') && (end[1] == ':'))
355				{
356				*end='\0';
357				end+=2;
358				psection=pname;
359				pname=end;
360				end=eat_alpha_numeric(conf, end);
361				}
362			p=eat_ws(conf, end);
363			if (*p != '=')
364				{
365				CONFerr(CONF_F_CONF_LOAD_BIO,
366						CONF_R_MISSING_EQUAL_SIGN);
367				goto err;
368				}
369			*end='\0';
370			p++;
371			start=eat_ws(conf, p);
372			while (!IS_EOF(conf,*p))
373				p++;
374			p--;
375			while ((p != start) && (IS_WS(conf,*p)))
376				p--;
377			p++;
378			*p='\0';
379
380			if (!(v=(CONF_VALUE *)OPENSSL_malloc(sizeof(CONF_VALUE))))
381				{
382				CONFerr(CONF_F_CONF_LOAD_BIO,
383							ERR_R_MALLOC_FAILURE);
384				goto err;
385				}
386			if (psection == NULL) psection=section;
387			v->name=(char *)OPENSSL_malloc(strlen(pname)+1);
388			v->value=NULL;
389			if (v->name == NULL)
390				{
391				CONFerr(CONF_F_CONF_LOAD_BIO,
392							ERR_R_MALLOC_FAILURE);
393				goto err;
394				}
395			BUF_strlcpy(v->name,pname,strlen(pname)+1);
396			if (!str_copy(conf,psection,&(v->value),start)) goto err;
397
398			if (strcmp(psection,section) != 0)
399				{
400				if ((tv=_CONF_get_section(conf,psection))
401					== NULL)
402					tv=_CONF_new_section(conf,psection);
403				if (tv == NULL)
404					{
405					CONFerr(CONF_F_CONF_LOAD_BIO,
406					   CONF_R_UNABLE_TO_CREATE_NEW_SECTION);
407					goto err;
408					}
409				ts=(STACK_OF(CONF_VALUE) *)tv->value;
410				}
411			else
412				{
413				tv=sv;
414				ts=section_sk;
415				}
416#if 1
417			if (_CONF_add_string(conf, tv, v) == 0)
418				{
419				CONFerr(CONF_F_CONF_LOAD_BIO,
420							ERR_R_MALLOC_FAILURE);
421				goto err;
422				}
423#else
424			v->section=tv->section;
425			if (!sk_CONF_VALUE_push(ts,v))
426				{
427				CONFerr(CONF_F_CONF_LOAD_BIO,
428							ERR_R_MALLOC_FAILURE);
429				goto err;
430				}
431			vv=(CONF_VALUE *)lh_insert(conf->data,v);
432			if (vv != NULL)
433				{
434				sk_CONF_VALUE_delete_ptr(ts,vv);
435				OPENSSL_free(vv->name);
436				OPENSSL_free(vv->value);
437				OPENSSL_free(vv);
438				}
439#endif
440			v=NULL;
441			}
442		}
443	if (buff != NULL) BUF_MEM_free(buff);
444	if (section != NULL) OPENSSL_free(section);
445	return(1);
446err:
447	if (buff != NULL) BUF_MEM_free(buff);
448	if (section != NULL) OPENSSL_free(section);
449	if (line != NULL) *line=eline;
450	BIO_snprintf(btmp,sizeof btmp,"%ld",eline);
451	ERR_add_error_data(2,"line ",btmp);
452	if ((h != conf->data) && (conf->data != NULL))
453		{
454		CONF_free(conf->data);
455		conf->data=NULL;
456		}
457	if (v != NULL)
458		{
459		if (v->name != NULL) OPENSSL_free(v->name);
460		if (v->value != NULL) OPENSSL_free(v->value);
461		if (v != NULL) OPENSSL_free(v);
462		}
463	return(0);
464	}
465
466static void clear_comments(CONF *conf, char *p)
467	{
468	char *to;
469
470	to=p;
471	for (;;)
472		{
473		if (IS_FCOMMENT(conf,*p))
474			{
475			*p='\0';
476			return;
477			}
478		if (!IS_WS(conf,*p))
479			{
480			break;
481			}
482		p++;
483		}
484
485	for (;;)
486		{
487		if (IS_COMMENT(conf,*p))
488			{
489			*p='\0';
490			return;
491			}
492		if (IS_DQUOTE(conf,*p))
493			{
494			p=scan_dquote(conf, p);
495			continue;
496			}
497		if (IS_QUOTE(conf,*p))
498			{
499			p=scan_quote(conf, p);
500			continue;
501			}
502		if (IS_ESC(conf,*p))
503			{
504			p=scan_esc(conf,p);
505			continue;
506			}
507		if (IS_EOF(conf,*p))
508			return;
509		else
510			p++;
511		}
512	}
513
514static int str_copy(CONF *conf, char *section, char **pto, char *from)
515	{
516	int q,r,rr=0,to=0,len=0;
517	char *s,*e,*rp,*p,*rrp,*np,*cp,v;
518	BUF_MEM *buf;
519
520	if ((buf=BUF_MEM_new()) == NULL) return(0);
521
522	len=strlen(from)+1;
523	if (!BUF_MEM_grow(buf,len)) goto err;
524
525	for (;;)
526		{
527		if (IS_QUOTE(conf,*from))
528			{
529			q= *from;
530			from++;
531			while (!IS_EOF(conf,*from) && (*from != q))
532				{
533				if (IS_ESC(conf,*from))
534					{
535					from++;
536					if (IS_EOF(conf,*from)) break;
537					}
538				buf->data[to++]= *(from++);
539				}
540			if (*from == q) from++;
541			}
542		else if (IS_DQUOTE(conf,*from))
543			{
544			q= *from;
545			from++;
546			while (!IS_EOF(conf,*from))
547				{
548				if (*from == q)
549					{
550					if (*(from+1) == q)
551						{
552						from++;
553						}
554					else
555						{
556						break;
557						}
558					}
559				buf->data[to++]= *(from++);
560				}
561			if (*from == q) from++;
562			}
563		else if (IS_ESC(conf,*from))
564			{
565			from++;
566			v= *(from++);
567			if (IS_EOF(conf,v)) break;
568			else if (v == 'r') v='\r';
569			else if (v == 'n') v='\n';
570			else if (v == 'b') v='\b';
571			else if (v == 't') v='\t';
572			buf->data[to++]= v;
573			}
574		else if (IS_EOF(conf,*from))
575			break;
576		else if (*from == '$')
577			{
578			/* try to expand it */
579			rrp=NULL;
580			s= &(from[1]);
581			if (*s == '{')
582				q='}';
583			else if (*s == '(')
584				q=')';
585			else q=0;
586
587			if (q) s++;
588			cp=section;
589			e=np=s;
590			while (IS_ALPHA_NUMERIC(conf,*e))
591				e++;
592			if ((e[0] == ':') && (e[1] == ':'))
593				{
594				cp=np;
595				rrp=e;
596				rr= *e;
597				*rrp='\0';
598				e+=2;
599				np=e;
600				while (IS_ALPHA_NUMERIC(conf,*e))
601					e++;
602				}
603			r= *e;
604			*e='\0';
605			rp=e;
606			if (q)
607				{
608				if (r != q)
609					{
610					CONFerr(CONF_F_STR_COPY,CONF_R_NO_CLOSE_BRACE);
611					goto err;
612					}
613				e++;
614				}
615			/* So at this point we have
616			 * ns which is the start of the name string which is
617			 *   '\0' terminated.
618			 * cs which is the start of the section string which is
619			 *   '\0' terminated.
620			 * e is the 'next point after'.
621			 * r and s are the chars replaced by the '\0'
622			 * rp and sp is where 'r' and 's' came from.
623			 */
624			p=_CONF_get_string(conf,cp,np);
625			if (rrp != NULL) *rrp=rr;
626			*rp=r;
627			if (p == NULL)
628				{
629				CONFerr(CONF_F_STR_COPY,CONF_R_VARIABLE_HAS_NO_VALUE);
630				goto err;
631				}
632			BUF_MEM_grow_clean(buf,(strlen(p)+len-(e-from)));
633			while (*p)
634				buf->data[to++]= *(p++);
635
636			/* Since we change the pointer 'from', we also have
637			   to change the perceived length of the string it
638			   points at.  /RL */
639			len -= e-from;
640			from=e;
641			}
642		else
643			buf->data[to++]= *(from++);
644		}
645	buf->data[to]='\0';
646	if (*pto != NULL) OPENSSL_free(*pto);
647	*pto=buf->data;
648	OPENSSL_free(buf);
649	return(1);
650err:
651	if (buf != NULL) BUF_MEM_free(buf);
652	return(0);
653	}
654
655static char *eat_ws(CONF *conf, char *p)
656	{
657	while (IS_WS(conf,*p) && (!IS_EOF(conf,*p)))
658		p++;
659	return(p);
660	}
661
662static char *eat_alpha_numeric(CONF *conf, char *p)
663	{
664	for (;;)
665		{
666		if (IS_ESC(conf,*p))
667			{
668			p=scan_esc(conf,p);
669			continue;
670			}
671		if (!IS_ALPHA_NUMERIC_PUNCT(conf,*p))
672			return(p);
673		p++;
674		}
675	}
676
677static char *scan_quote(CONF *conf, char *p)
678	{
679	int q= *p;
680
681	p++;
682	while (!(IS_EOF(conf,*p)) && (*p != q))
683		{
684		if (IS_ESC(conf,*p))
685			{
686			p++;
687			if (IS_EOF(conf,*p)) return(p);
688			}
689		p++;
690		}
691	if (*p == q) p++;
692	return(p);
693	}
694
695
696static char *scan_dquote(CONF *conf, char *p)
697	{
698	int q= *p;
699
700	p++;
701	while (!(IS_EOF(conf,*p)))
702		{
703		if (*p == q)
704			{
705			if (*(p+1) == q)
706				{
707				p++;
708				}
709			else
710				{
711				break;
712				}
713			}
714		p++;
715		}
716	if (*p == q) p++;
717	return(p);
718	}
719
720static void dump_value(CONF_VALUE *a, BIO *out)
721	{
722	if (a->name)
723		BIO_printf(out, "[%s] %s=%s\n", a->section, a->name, a->value);
724	else
725		BIO_printf(out, "[[%s]]\n", a->section);
726	}
727
728static IMPLEMENT_LHASH_DOALL_ARG_FN(dump_value, CONF_VALUE *, BIO *)
729
730static int def_dump(const CONF *conf, BIO *out)
731	{
732	lh_doall_arg(conf->data, LHASH_DOALL_ARG_FN(dump_value), out);
733	return 1;
734	}
735
736static int def_is_number(const CONF *conf, char c)
737	{
738	return IS_NUMBER(conf,c);
739	}
740
741static int def_to_int(const CONF *conf, char c)
742	{
743	return c - '0';
744	}
745
746