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 "cryptlib.h"
64 #include <openssl/stack.h>
65 #include <openssl/lhash.h>
66 #include <openssl/conf.h>
67 #include <openssl/conf_api.h>
68 #include "conf_def.h"
69 #include <openssl/buffer.h>
70 #include <openssl/err.h>
71
72 static char *eat_ws(CONF *conf, char *p);
73 static char *eat_alpha_numeric(CONF *conf, char *p);
74 static void clear_comments(CONF *conf, char *p);
75 static int str_copy(CONF *conf,char *section,char **to, char *from);
76 static char *scan_quote(CONF *conf, char *p);
77 static char *scan_dquote(CONF *conf, char *p);
78 #define scan_esc(conf,p) (((IS_EOF((conf),(p)[1]))?((p)+1):((p)+2)))
79
80 static CONF *def_create(CONF_METHOD *meth);
81 static int def_init_default(CONF *conf);
82 static int def_init_WIN32(CONF *conf);
83 static int def_destroy(CONF *conf);
84 static int def_destroy_data(CONF *conf);
85 static int def_load(CONF *conf, const char *name, long *eline);
86 static int def_load_bio(CONF *conf, BIO *bp, long *eline);
87 static int def_dump(const CONF *conf, BIO *bp);
88 static int def_is_number(const CONF *conf, char c);
89 static int def_to_int(const CONF *conf, char c);
90
91 const char CONF_def_version[]="CONF_def" OPENSSL_VERSION_PTEXT;
92
93 static 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
106 static 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
119 CONF_METHOD *NCONF_default()
120 {
121 return &default_method;
122 }
123 CONF_METHOD *NCONF_WIN32()
124 {
125 return &WIN32_method;
126 }
127
128 static CONF *def_create(CONF_METHOD *meth)
129 {
130 CONF *ret;
131
132 ret = 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
142 static int def_init_default(CONF *conf)
143 {
144 if (conf == NULL)
145 return 0;
146
147 conf->meth = &default_method;
148 conf->meth_data = CONF_type_default;
149 conf->data = NULL;
150
151 return 1;
152 }
153
154 static 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
166 static 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
176 static int def_destroy_data(CONF *conf)
177 {
178 if (conf == NULL)
179 return 0;
180 _CONF_free_data(conf);
181 return 1;
182 }
183
184 static 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_DEF_LOAD,CONF_R_NO_SUCH_FILE);
198 else
199 CONFerr(CONF_F_DEF_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
209 static 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;
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 char *start,*psection,*pname;
223 void *h = (void *)(conf->data);
224
225 if ((buff=BUF_MEM_new()) == NULL)
226 {
227 CONFerr(CONF_F_DEF_LOAD_BIO,ERR_R_BUF_LIB);
228 goto err;
229 }
230
231 section=(char *)OPENSSL_malloc(10);
232 if (section == NULL)
233 {
234 CONFerr(CONF_F_DEF_LOAD_BIO,ERR_R_MALLOC_FAILURE);
235 goto err;
236 }
237 BUF_strlcpy(section,"default",10);
238
239 if (_CONF_new_data(conf) == 0)
240 {
241 CONFerr(CONF_F_DEF_LOAD_BIO,ERR_R_MALLOC_FAILURE);
242 goto err;
243 }
244
245 sv=_CONF_new_section(conf,section);
246 if (sv == NULL)
247 {
248 CONFerr(CONF_F_DEF_LOAD_BIO,
249 CONF_R_UNABLE_TO_CREATE_NEW_SECTION);
250 goto err;
251 }
252
253 bufnum=0;
254 again=0;
255 for (;;)
256 {
257 if (!BUF_MEM_grow(buff,bufnum+CONFBUFSIZE))
258 {
259 CONFerr(CONF_F_DEF_LOAD_BIO,ERR_R_BUF_LIB);
260 goto err;
261 }
262 p= &(buff->data[bufnum]);
263 *p='\0';
264 BIO_gets(in, p, CONFBUFSIZE-1);
265 p[CONFBUFSIZE-1]='\0';
266 ii=i=strlen(p);
267 if (i == 0 && !again) break;
268 again=0;
269 while (i > 0)
270 {
271 if ((p[i-1] != '\r') && (p[i-1] != '\n'))
272 break;
273 else
274 i--;
275 }
276 /* we removed some trailing stuff so there is a new
277 * line on the end. */
278 if (ii && i == ii)
279 again=1; /* long line */
280 else
281 {
282 p[i]='\0';
283 eline++; /* another input line */
284 }
285
286 /* we now have a line with trailing \r\n removed */
287
288 /* i is the number of bytes */
289 bufnum+=i;
290
291 v=NULL;
292 /* check for line continuation */
293 if (bufnum >= 1)
294 {
295 /* If we have bytes and the last char '\\' and
296 * second last char is not '\\' */
297 p= &(buff->data[bufnum-1]);
298 if (IS_ESC(conf,p[0]) &&
299 ((bufnum <= 1) || !IS_ESC(conf,p[-1])))
300 {
301 bufnum--;
302 again=1;
303 }
304 }
305 if (again) continue;
306 bufnum=0;
307 buf=buff->data;
308
309 clear_comments(conf, buf);
310 s=eat_ws(conf, buf);
311 if (IS_EOF(conf,*s)) continue; /* blank line */
312 if (*s == '[')
313 {
314 char *ss;
315
316 s++;
317 start=eat_ws(conf, s);
318 ss=start;
319 again:
320 end=eat_alpha_numeric(conf, ss);
321 p=eat_ws(conf, end);
322 if (*p != ']')
323 {
324 if (*p != '\0' && ss != p)
325 {
326 ss=p;
327 goto again;
328 }
329 CONFerr(CONF_F_DEF_LOAD_BIO,
330 CONF_R_MISSING_CLOSE_SQUARE_BRACKET);
331 goto err;
332 }
333 *end='\0';
334 if (!str_copy(conf,NULL,§ion,start)) goto err;
335 if ((sv=_CONF_get_section(conf,section)) == NULL)
336 sv=_CONF_new_section(conf,section);
337 if (sv == NULL)
338 {
339 CONFerr(CONF_F_DEF_LOAD_BIO,
340 CONF_R_UNABLE_TO_CREATE_NEW_SECTION);
341 goto err;
342 }
343 continue;
344 }
345 else
346 {
347 pname=s;
348 psection=NULL;
349 end=eat_alpha_numeric(conf, s);
350 if ((end[0] == ':') && (end[1] == ':'))
351 {
352 *end='\0';
353 end+=2;
354 psection=pname;
355 pname=end;
356 end=eat_alpha_numeric(conf, end);
357 }
358 p=eat_ws(conf, end);
359 if (*p != '=')
360 {
361 CONFerr(CONF_F_DEF_LOAD_BIO,
362 CONF_R_MISSING_EQUAL_SIGN);
363 goto err;
364 }
365 *end='\0';
366 p++;
367 start=eat_ws(conf, p);
368 while (!IS_EOF(conf,*p))
369 p++;
370 p--;
371 while ((p != start) && (IS_WS(conf,*p)))
372 p--;
373 p++;
374 *p='\0';
375
376 if (!(v=(CONF_VALUE *)OPENSSL_malloc(sizeof(CONF_VALUE))))
377 {
378 CONFerr(CONF_F_DEF_LOAD_BIO,
379 ERR_R_MALLOC_FAILURE);
380 goto err;
381 }
382 if (psection == NULL) psection=section;
383 v->name=(char *)OPENSSL_malloc(strlen(pname)+1);
384 v->value=NULL;
385 if (v->name == NULL)
386 {
387 CONFerr(CONF_F_DEF_LOAD_BIO,
388 ERR_R_MALLOC_FAILURE);
389 goto err;
390 }
391 BUF_strlcpy(v->name,pname,strlen(pname)+1);
392 if (!str_copy(conf,psection,&(v->value),start)) goto err;
393
394 if (strcmp(psection,section) != 0)
395 {
396 if ((tv=_CONF_get_section(conf,psection))
397 == NULL)
398 tv=_CONF_new_section(conf,psection);
399 if (tv == NULL)
400 {
401 CONFerr(CONF_F_DEF_LOAD_BIO,
402 CONF_R_UNABLE_TO_CREATE_NEW_SECTION);
403 goto err;
404 }
405 }
406 else
407 tv=sv;
408 #if 1
409 if (_CONF_add_string(conf, tv, v) == 0)
410 {
411 CONFerr(CONF_F_DEF_LOAD_BIO,
412 ERR_R_MALLOC_FAILURE);
413 goto err;
414 }
415 #else
416 v->section=tv->section;
417 if (!sk_CONF_VALUE_push(ts,v))
418 {
419 CONFerr(CONF_F_DEF_LOAD_BIO,
420 ERR_R_MALLOC_FAILURE);
421 goto err;
422 }
423 vv=(CONF_VALUE *)lh_insert(conf->data,v);
424 if (vv != NULL)
425 {
426 sk_CONF_VALUE_delete_ptr(ts,vv);
427 OPENSSL_free(vv->name);
428 OPENSSL_free(vv->value);
429 OPENSSL_free(vv);
430 }
431 #endif
432 v=NULL;
433 }
434 }
435 if (buff != NULL) BUF_MEM_free(buff);
436 if (section != NULL) OPENSSL_free(section);
437 return(1);
438 err:
439 if (buff != NULL) BUF_MEM_free(buff);
440 if (section != NULL) OPENSSL_free(section);
441 if (line != NULL) *line=eline;
442 BIO_snprintf(btmp,sizeof btmp,"%ld",eline);
443 ERR_add_error_data(2,"line ",btmp);
444 if ((h != conf->data) && (conf->data != NULL))
445 {
446 CONF_free(conf->data);
447 conf->data=NULL;
448 }
449 if (v != NULL)
450 {
451 if (v->name != NULL) OPENSSL_free(v->name);
452 if (v->value != NULL) OPENSSL_free(v->value);
453 if (v != NULL) OPENSSL_free(v);
454 }
455 return(0);
456 }
457
458 static void clear_comments(CONF *conf, char *p)
459 {
460 for (;;)
461 {
462 if (IS_FCOMMENT(conf,*p))
463 {
464 *p='\0';
465 return;
466 }
467 if (!IS_WS(conf,*p))
468 {
469 break;
470 }
471 p++;
472 }
473
474 for (;;)
475 {
476 if (IS_COMMENT(conf,*p))
477 {
478 *p='\0';
479 return;
480 }
481 if (IS_DQUOTE(conf,*p))
482 {
483 p=scan_dquote(conf, p);
484 continue;
485 }
486 if (IS_QUOTE(conf,*p))
487 {
488 p=scan_quote(conf, p);
489 continue;
490 }
491 if (IS_ESC(conf,*p))
492 {
493 p=scan_esc(conf,p);
494 continue;
495 }
496 if (IS_EOF(conf,*p))
497 return;
498 else
499 p++;
500 }
501 }
502
503 static int str_copy(CONF *conf, char *section, char **pto, char *from)
504 {
505 int q,r,rr=0,to=0,len=0;
506 char *s,*e,*rp,*p,*rrp,*np,*cp,v;
507 BUF_MEM *buf;
508
509 if ((buf=BUF_MEM_new()) == NULL) return(0);
510
511 len=strlen(from)+1;
512 if (!BUF_MEM_grow(buf,len)) goto err;
513
514 for (;;)
515 {
516 if (IS_QUOTE(conf,*from))
517 {
518 q= *from;
519 from++;
520 while (!IS_EOF(conf,*from) && (*from != q))
521 {
522 if (IS_ESC(conf,*from))
523 {
524 from++;
525 if (IS_EOF(conf,*from)) break;
526 }
527 buf->data[to++]= *(from++);
528 }
529 if (*from == q) from++;
530 }
531 else if (IS_DQUOTE(conf,*from))
532 {
533 q= *from;
534 from++;
535 while (!IS_EOF(conf,*from))
536 {
537 if (*from == q)
538 {
539 if (*(from+1) == q)
540 {
541 from++;
542 }
543 else
544 {
545 break;
546 }
547 }
548 buf->data[to++]= *(from++);
549 }
550 if (*from == q) from++;
551 }
552 else if (IS_ESC(conf,*from))
553 {
554 from++;
555 v= *(from++);
556 if (IS_EOF(conf,v)) break;
557 else if (v == 'r') v='\r';
558 else if (v == 'n') v='\n';
559 else if (v == 'b') v='\b';
560 else if (v == 't') v='\t';
561 buf->data[to++]= v;
562 }
563 else if (IS_EOF(conf,*from))
564 break;
565 else if (*from == '$')
566 {
567 /* try to expand it */
568 rrp=NULL;
569 s= &(from[1]);
570 if (*s == '{')
571 q='}';
572 else if (*s == '(')
573 q=')';
574 else q=0;
575
576 if (q) s++;
577 cp=section;
578 e=np=s;
579 while (IS_ALPHA_NUMERIC(conf,*e))
580 e++;
581 if ((e[0] == ':') && (e[1] == ':'))
582 {
583 cp=np;
584 rrp=e;
585 rr= *e;
586 *rrp='\0';
587 e+=2;
588 np=e;
589 while (IS_ALPHA_NUMERIC(conf,*e))
590 e++;
591 }
592 r= *e;
593 *e='\0';
594 rp=e;
595 if (q)
596 {
597 if (r != q)
598 {
599 CONFerr(CONF_F_STR_COPY,CONF_R_NO_CLOSE_BRACE);
600 goto err;
601 }
602 e++;
603 }
604 /* So at this point we have
605 * np which is the start of the name string which is
606 * '\0' terminated.
607 * cp which is the start of the section string which is
608 * '\0' terminated.
609 * e is the 'next point after'.
610 * r and rr are the chars replaced by the '\0'
611 * rp and rrp is where 'r' and 'rr' came from.
612 */
613 p=_CONF_get_string(conf,cp,np);
614 if (rrp != NULL) *rrp=rr;
615 *rp=r;
616 if (p == NULL)
617 {
618 CONFerr(CONF_F_STR_COPY,CONF_R_VARIABLE_HAS_NO_VALUE);
619 goto err;
620 }
621 BUF_MEM_grow_clean(buf,(strlen(p)+buf->length-(e-from)));
622 while (*p)
623 buf->data[to++]= *(p++);
624
625 /* Since we change the pointer 'from', we also have
626 to change the perceived length of the string it
627 points at. /RL */
628 len -= e-from;
629 from=e;
630
631 /* In case there were no braces or parenthesis around
632 the variable reference, we have to put back the
633 character that was replaced with a '\0'. /RL */
634 *rp = r;
635 }
636 else
637 buf->data[to++]= *(from++);
638 }
639 buf->data[to]='\0';
640 if (*pto != NULL) OPENSSL_free(*pto);
641 *pto=buf->data;
642 OPENSSL_free(buf);
643 return(1);
644 err:
645 if (buf != NULL) BUF_MEM_free(buf);
646 return(0);
647 }
648
649 static char *eat_ws(CONF *conf, char *p)
650 {
651 while (IS_WS(conf,*p) && (!IS_EOF(conf,*p)))
652 p++;
653 return(p);
654 }
655
656 static char *eat_alpha_numeric(CONF *conf, char *p)
657 {
658 for (;;)
659 {
660 if (IS_ESC(conf,*p))
661 {
662 p=scan_esc(conf,p);
663 continue;
664 }
665 if (!IS_ALPHA_NUMERIC_PUNCT(conf,*p))
666 return(p);
667 p++;
668 }
669 }
670
671 static char *scan_quote(CONF *conf, char *p)
672 {
673 int q= *p;
674
675 p++;
676 while (!(IS_EOF(conf,*p)) && (*p != q))
677 {
678 if (IS_ESC(conf,*p))
679 {
680 p++;
681 if (IS_EOF(conf,*p)) return(p);
682 }
683 p++;
684 }
685 if (*p == q) p++;
686 return(p);
687 }
688
689
690 static char *scan_dquote(CONF *conf, char *p)
691 {
692 int q= *p;
693
694 p++;
695 while (!(IS_EOF(conf,*p)))
696 {
697 if (*p == q)
698 {
699 if (*(p+1) == q)
700 {
701 p++;
702 }
703 else
704 {
705 break;
706 }
707 }
708 p++;
709 }
710 if (*p == q) p++;
711 return(p);
712 }
713
714 static void dump_value_doall_arg(CONF_VALUE *a, BIO *out)
715 {
716 if (a->name)
717 BIO_printf(out, "[%s] %s=%s\n", a->section, a->name, a->value);
718 else
719 BIO_printf(out, "[[%s]]\n", a->section);
720 }
721
722 static IMPLEMENT_LHASH_DOALL_ARG_FN(dump_value, CONF_VALUE, BIO)
723
724 static int def_dump(const CONF *conf, BIO *out)
725 {
726 lh_CONF_VALUE_doall_arg(conf->data, LHASH_DOALL_ARG_FN(dump_value),
727 BIO, out);
728 return 1;
729 }
730
731 static int def_is_number(const CONF *conf, char c)
732 {
733 return IS_NUMBER(conf,c);
734 }
735
736 static int def_to_int(const CONF *conf, char c)
737 {
738 return c - '0';
739 }