fix warning
[openssl.git] / crypto / conf / conf_def.c
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 = (void *)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,&section,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         }
740