Sort openssl.ec, the configuration file for mkerr.pl.
[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 <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
71 static char *eat_ws(CONF *conf, char *p);
72 static char *eat_alpha_numeric(CONF *conf, char *p);
73 static void clear_comments(CONF *conf, char *p);
74 static int str_copy(CONF *conf,char *section,char **to, char *from);
75 static char *scan_quote(CONF *conf, char *p);
76 static char *scan_dquote(CONF *conf, char *p);
77 #define scan_esc(conf,p)        (((IS_EOF((conf),(p)[1]))?((p)+1):((p)+2)))
78
79 static CONF *def_create(CONF_METHOD *meth);
80 static int def_init_default(CONF *conf);
81 static int def_init_WIN32(CONF *conf);
82 static int def_destroy(CONF *conf);
83 static int def_destroy_data(CONF *conf);
84 static int def_load(CONF *conf, const char *name, long *eline);
85 static int def_load_bio(CONF *conf, BIO *bp, long *eline);
86 static int def_dump(CONF *conf, BIO *bp);
87 static int def_is_number(CONF *conf, char c);
88 static int def_to_int(CONF *conf, char c);
89
90 const char *CONF_def_version="CONF_def" OPENSSL_VERSION_PTEXT;
91
92 static CONF_METHOD default_method = {
93         "OpenSSL default",
94         def_create,
95         def_init_default,
96         def_destroy,
97         def_destroy_data,
98         def_load_bio,
99         def_dump,
100         def_is_number,
101         def_to_int,
102         def_load
103         };
104
105 static CONF_METHOD WIN32_method = {
106         "WIN32",
107         def_create,
108         def_init_WIN32,
109         def_destroy,
110         def_destroy_data,
111         def_load_bio,
112         def_dump,
113         def_is_number,
114         def_to_int,
115         def_load
116         };
117
118 CONF_METHOD *NCONF_default()
119         {
120         return &default_method;
121         }
122 CONF_METHOD *NCONF_WIN32()
123         {
124         return &WIN32_method;
125         }
126
127 static CONF *def_create(CONF_METHOD *meth)
128         {
129         CONF *ret;
130
131         ret = (CONF *)OPENSSL_malloc(sizeof(CONF) + sizeof(unsigned short *));
132         if (ret)
133                 if (meth->init(ret) == 0)
134                         {
135                         OPENSSL_free(ret);
136                         ret = NULL;
137                         }
138         return ret;
139         }
140         
141 static int def_init_default(CONF *conf)
142         {
143         if (conf == NULL)
144                 return 0;
145
146         conf->meth = &default_method;
147         conf->meth_data = (void *)CONF_type_default;
148         conf->data = NULL;
149
150         return 1;
151         }
152
153 static int def_init_WIN32(CONF *conf)
154         {
155         if (conf == NULL)
156                 return 0;
157
158         conf->meth = &WIN32_method;
159         conf->meth_data = (void *)CONF_type_win32;
160         conf->data = NULL;
161
162         return 1;
163         }
164
165 static int def_destroy(CONF *conf)
166         {
167         if (def_destroy_data(conf))
168                 {
169                 OPENSSL_free(conf);
170                 return 1;
171                 }
172         return 0;
173         }
174
175 static int def_destroy_data(CONF *conf)
176         {
177         if (conf == NULL)
178                 return 0;
179         _CONF_free_data(conf);
180         return 1;
181         }
182
183 static int def_load(CONF *conf, const char *name, long *line)
184         {
185         int ret;
186         BIO *in=NULL;
187
188 #ifdef OPENSSL_SYS_VMS
189         in=BIO_new_file(name, "r");
190 #else
191         in=BIO_new_file(name, "rb");
192 #endif
193         if (in == NULL)
194                 {
195                 CONFerr(CONF_F_CONF_LOAD,ERR_R_SYS_LIB);
196                 return 0;
197                 }
198
199         ret = def_load_bio(conf, in, line);
200         BIO_free(in);
201
202         return ret;
203         }
204
205 static int def_load_bio(CONF *conf, BIO *in, long *line)
206         {
207 #define BUFSIZE 512
208         char btmp[16];
209         int bufnum=0,i,ii;
210         BUF_MEM *buff=NULL;
211         char *s,*p,*end;
212         int again,n;
213         long eline=0;
214         CONF_VALUE *v=NULL,*tv;
215         CONF_VALUE *sv=NULL;
216         char *section=NULL,*buf;
217         STACK_OF(CONF_VALUE) *section_sk=NULL,*ts;
218         char *start,*psection,*pname;
219         void *h = (void *)(conf->data);
220
221         if ((buff=BUF_MEM_new()) == NULL)
222                 {
223                 CONFerr(CONF_F_CONF_LOAD_BIO,ERR_R_BUF_LIB);
224                 goto err;
225                 }
226
227         section=(char *)OPENSSL_malloc(10);
228         if (section == NULL)
229                 {
230                 CONFerr(CONF_F_CONF_LOAD_BIO,ERR_R_MALLOC_FAILURE);
231                 goto err;
232                 }
233         strcpy(section,"default");
234
235         if (_CONF_new_data(conf) == 0)
236                 {
237                 CONFerr(CONF_F_CONF_LOAD_BIO,ERR_R_MALLOC_FAILURE);
238                 goto err;
239                 }
240
241         sv=_CONF_new_section(conf,section);
242         if (sv == NULL)
243                 {
244                 CONFerr(CONF_F_CONF_LOAD_BIO,
245                                         CONF_R_UNABLE_TO_CREATE_NEW_SECTION);
246                 goto err;
247                 }
248         section_sk=(STACK_OF(CONF_VALUE) *)sv->value;
249
250         bufnum=0;
251         for (;;)
252                 {
253                 again=0;
254                 if (!BUF_MEM_grow(buff,bufnum+BUFSIZE))
255                         {
256                         CONFerr(CONF_F_CONF_LOAD_BIO,ERR_R_BUF_LIB);
257                         goto err;
258                         }
259                 p= &(buff->data[bufnum]);
260                 *p='\0';
261                 BIO_gets(in, p, BUFSIZE-1);
262                 p[BUFSIZE-1]='\0';
263                 ii=i=strlen(p);
264                 if (i == 0) break;
265                 while (i > 0)
266                         {
267                         if ((p[i-1] != '\r') && (p[i-1] != '\n'))
268                                 break;
269                         else
270                                 i--;
271                         }
272                 /* we removed some trailing stuff so there is a new
273                  * line on the end. */
274                 if (i == ii)
275                         again=1; /* long line */
276                 else
277                         {
278                         p[i]='\0';
279                         eline++; /* another input line */
280                         }
281
282                 /* we now have a line with trailing \r\n removed */
283
284                 /* i is the number of bytes */
285                 bufnum+=i;
286
287                 v=NULL;
288                 /* check for line continuation */
289                 if (bufnum >= 1)
290                         {
291                         /* If we have bytes and the last char '\\' and
292                          * second last char is not '\\' */
293                         p= &(buff->data[bufnum-1]);
294                         if (IS_ESC(conf,p[0]) &&
295                                 ((bufnum <= 1) || !IS_ESC(conf,p[-1])))
296                                 {
297                                 bufnum--;
298                                 again=1;
299                                 }
300                         }
301                 if (again) continue;
302                 bufnum=0;
303                 buf=buff->data;
304
305                 clear_comments(conf, buf);
306                 n=strlen(buf);
307                 s=eat_ws(conf, buf);
308                 if (IS_EOF(conf,*s)) continue; /* blank line */
309                 if (*s == '[')
310                         {
311                         char *ss;
312
313                         s++;
314                         start=eat_ws(conf, s);
315                         ss=start;
316 again:
317                         end=eat_alpha_numeric(conf, ss);
318                         p=eat_ws(conf, end);
319                         if (*p != ']')
320                                 {
321                                 if (*p != '\0')
322                                         {
323                                         ss=p;
324                                         goto again;
325                                         }
326                                 CONFerr(CONF_F_CONF_LOAD_BIO,
327                                         CONF_R_MISSING_CLOSE_SQUARE_BRACKET);
328                                 goto err;
329                                 }
330                         *end='\0';
331                         if (!str_copy(conf,NULL,&section,start)) goto err;
332                         if ((sv=_CONF_get_section(conf,section)) == NULL)
333                                 sv=_CONF_new_section(conf,section);
334                         if (sv == NULL)
335                                 {
336                                 CONFerr(CONF_F_CONF_LOAD_BIO,
337                                         CONF_R_UNABLE_TO_CREATE_NEW_SECTION);
338                                 goto err;
339                                 }
340                         section_sk=(STACK_OF(CONF_VALUE) *)sv->value;
341                         continue;
342                         }
343                 else
344                         {
345                         pname=s;
346                         psection=NULL;
347                         end=eat_alpha_numeric(conf, s);
348                         if ((end[0] == ':') && (end[1] == ':'))
349                                 {
350                                 *end='\0';
351                                 end+=2;
352                                 psection=pname;
353                                 pname=end;
354                                 end=eat_alpha_numeric(conf, end);
355                                 }
356                         p=eat_ws(conf, end);
357                         if (*p != '=')
358                                 {
359                                 CONFerr(CONF_F_CONF_LOAD_BIO,
360                                                 CONF_R_MISSING_EQUAL_SIGN);
361                                 goto err;
362                                 }
363                         *end='\0';
364                         p++;
365                         start=eat_ws(conf, p);
366                         while (!IS_EOF(conf,*p))
367                                 p++;
368                         p--;
369                         while ((p != start) && (IS_WS(conf,*p)))
370                                 p--;
371                         p++;
372                         *p='\0';
373
374                         if (!(v=(CONF_VALUE *)OPENSSL_malloc(sizeof(CONF_VALUE))))
375                                 {
376                                 CONFerr(CONF_F_CONF_LOAD_BIO,
377                                                         ERR_R_MALLOC_FAILURE);
378                                 goto err;
379                                 }
380                         if (psection == NULL) psection=section;
381                         v->name=(char *)OPENSSL_malloc(strlen(pname)+1);
382                         v->value=NULL;
383                         if (v->name == NULL)
384                                 {
385                                 CONFerr(CONF_F_CONF_LOAD_BIO,
386                                                         ERR_R_MALLOC_FAILURE);
387                                 goto err;
388                                 }
389                         strcpy(v->name,pname);
390                         if (!str_copy(conf,psection,&(v->value),start)) goto err;
391
392                         if (strcmp(psection,section) != 0)
393                                 {
394                                 if ((tv=_CONF_get_section(conf,psection))
395                                         == NULL)
396                                         tv=_CONF_new_section(conf,psection);
397                                 if (tv == NULL)
398                                         {
399                                         CONFerr(CONF_F_CONF_LOAD_BIO,
400                                            CONF_R_UNABLE_TO_CREATE_NEW_SECTION);
401                                         goto err;
402                                         }
403                                 ts=(STACK_OF(CONF_VALUE) *)tv->value;
404                                 }
405                         else
406                                 {
407                                 tv=sv;
408                                 ts=section_sk;
409                                 }
410 #if 1
411                         if (_CONF_add_string(conf, tv, v) == 0)
412                                 {
413                                 CONFerr(CONF_F_CONF_LOAD_BIO,
414                                                         ERR_R_MALLOC_FAILURE);
415                                 goto err;
416                                 }
417 #else
418                         v->section=tv->section; 
419                         if (!sk_CONF_VALUE_push(ts,v))
420                                 {
421                                 CONFerr(CONF_F_CONF_LOAD_BIO,
422                                                         ERR_R_MALLOC_FAILURE);
423                                 goto err;
424                                 }
425                         vv=(CONF_VALUE *)lh_insert(conf->data,v);
426                         if (vv != NULL)
427                                 {
428                                 sk_CONF_VALUE_delete_ptr(ts,vv);
429                                 OPENSSL_free(vv->name);
430                                 OPENSSL_free(vv->value);
431                                 OPENSSL_free(vv);
432                                 }
433 #endif
434                         v=NULL;
435                         }
436                 }
437         if (buff != NULL) BUF_MEM_free(buff);
438         if (section != NULL) OPENSSL_free(section);
439         return(1);
440 err:
441         if (buff != NULL) BUF_MEM_free(buff);
442         if (section != NULL) OPENSSL_free(section);
443         if (line != NULL) *line=eline;
444         sprintf(btmp,"%ld",eline);
445         ERR_add_error_data(2,"line ",btmp);
446         if ((h != conf->data) && (conf->data != NULL)) CONF_free(conf->data);
447         if (v != NULL)
448                 {
449                 if (v->name != NULL) OPENSSL_free(v->name);
450                 if (v->value != NULL) OPENSSL_free(v->value);
451                 if (v != NULL) OPENSSL_free(v);
452                 }
453         return(0);
454         }
455
456 static void clear_comments(CONF *conf, char *p)
457         {
458         char *to;
459
460         to=p;
461         for (;;)
462                 {
463                 if (IS_FCOMMENT(conf,*p))
464                         {
465                         *p='\0';
466                         return;
467                         }
468                 if (!IS_WS(conf,*p))
469                         {
470                         break;
471                         }
472                 p++;
473                 }
474
475         for (;;)
476                 {
477                 if (IS_COMMENT(conf,*p))
478                         {
479                         *p='\0';
480                         return;
481                         }
482                 if (IS_DQUOTE(conf,*p))
483                         {
484                         p=scan_dquote(conf, p);
485                         continue;
486                         }
487                 if (IS_QUOTE(conf,*p))
488                         {
489                         p=scan_quote(conf, p);
490                         continue;
491                         }
492                 if (IS_ESC(conf,*p))
493                         {
494                         p=scan_esc(conf,p);
495                         continue;
496                         }
497                 if (IS_EOF(conf,*p))
498                         return;
499                 else
500                         p++;
501                 }
502         }
503
504 static int str_copy(CONF *conf, char *section, char **pto, char *from)
505         {
506         int q,r,rr=0,to=0,len=0;
507         char *s,*e,*rp,*p,*rrp,*np,*cp,v;
508         BUF_MEM *buf;
509
510         if ((buf=BUF_MEM_new()) == NULL) return(0);
511
512         len=strlen(from)+1;
513         if (!BUF_MEM_grow(buf,len)) goto err;
514
515         for (;;)
516                 {
517                 if (IS_QUOTE(conf,*from))
518                         {
519                         q= *from;
520                         from++;
521                         while (!IS_EOF(conf,*from) && (*from != q))
522                                 {
523                                 if (IS_ESC(conf,*from))
524                                         {
525                                         from++;
526                                         if (IS_EOF(conf,*from)) break;
527                                         }
528                                 buf->data[to++]= *(from++);
529                                 }
530                         if (*from == q) from++;
531                         }
532                 else if (IS_DQUOTE(conf,*from))
533                         {
534                         q= *from;
535                         from++;
536                         while (!IS_EOF(conf,*from))
537                                 {
538                                 if (*from == q)
539                                         {
540                                         if (*(from+1) == q)
541                                                 {
542                                                 from++;
543                                                 }
544                                         else
545                                                 {
546                                                 break;
547                                                 }
548                                         }
549                                 buf->data[to++]= *(from++);
550                                 }
551                         if (*from == q) from++;
552                         }
553                 else if (IS_ESC(conf,*from))
554                         {
555                         from++;
556                         v= *(from++);
557                         if (IS_EOF(conf,v)) break;
558                         else if (v == 'r') v='\r';
559                         else if (v == 'n') v='\n';
560                         else if (v == 'b') v='\b';
561                         else if (v == 't') v='\t';
562                         buf->data[to++]= v;
563                         }
564                 else if (IS_EOF(conf,*from))
565                         break;
566                 else if (*from == '$')
567                         {
568                         /* try to expand it */
569                         rrp=NULL;
570                         s= &(from[1]);
571                         if (*s == '{')
572                                 q='}';
573                         else if (*s == '(')
574                                 q=')';
575                         else q=0;
576
577                         if (q) s++;
578                         cp=section;
579                         e=np=s;
580                         while (IS_ALPHA_NUMERIC(conf,*e))
581                                 e++;
582                         if ((e[0] == ':') && (e[1] == ':'))
583                                 {
584                                 cp=np;
585                                 rrp=e;
586                                 rr= *e;
587                                 *rrp='\0';
588                                 e+=2;
589                                 np=e;
590                                 while (IS_ALPHA_NUMERIC(conf,*e))
591                                         e++;
592                                 }
593                         r= *e;
594                         *e='\0';
595                         rp=e;
596                         if (q)
597                                 {
598                                 if (r != q)
599                                         {
600                                         CONFerr(CONF_F_STR_COPY,CONF_R_NO_CLOSE_BRACE);
601                                         goto err;
602                                         }
603                                 e++;
604                                 }
605                         /* So at this point we have
606                          * ns which is the start of the name string which is
607                          *   '\0' terminated. 
608                          * cs which is the start of the section string which is
609                          *   '\0' terminated.
610                          * e is the 'next point after'.
611                          * r and s are the chars replaced by the '\0'
612                          * rp and sp is where 'r' and 's' came from.
613                          */
614                         p=_CONF_get_string(conf,cp,np);
615                         if (rrp != NULL) *rrp=rr;
616                         *rp=r;
617                         if (p == NULL)
618                                 {
619                                 CONFerr(CONF_F_STR_COPY,CONF_R_VARIABLE_HAS_NO_VALUE);
620                                 goto err;
621                                 }
622                         BUF_MEM_grow(buf,(strlen(p)+len-(e-from)));
623                         while (*p)
624                                 buf->data[to++]= *(p++);
625                         from=e;
626                         }
627                 else
628                         buf->data[to++]= *(from++);
629                 }
630         buf->data[to]='\0';
631         if (*pto != NULL) OPENSSL_free(*pto);
632         *pto=buf->data;
633         OPENSSL_free(buf);
634         return(1);
635 err:
636         if (buf != NULL) BUF_MEM_free(buf);
637         return(0);
638         }
639
640 static char *eat_ws(CONF *conf, char *p)
641         {
642         while (IS_WS(conf,*p) && (!IS_EOF(conf,*p)))
643                 p++;
644         return(p);
645         }
646
647 static char *eat_alpha_numeric(CONF *conf, char *p)
648         {
649         for (;;)
650                 {
651                 if (IS_ESC(conf,*p))
652                         {
653                         p=scan_esc(conf,p);
654                         continue;
655                         }
656                 if (!IS_ALPHA_NUMERIC_PUNCT(conf,*p))
657                         return(p);
658                 p++;
659                 }
660         }
661
662 static char *scan_quote(CONF *conf, char *p)
663         {
664         int q= *p;
665
666         p++;
667         while (!(IS_EOF(conf,*p)) && (*p != q))
668                 {
669                 if (IS_ESC(conf,*p))
670                         {
671                         p++;
672                         if (IS_EOF(conf,*p)) return(p);
673                         }
674                 p++;
675                 }
676         if (*p == q) p++;
677         return(p);
678         }
679
680
681 static char *scan_dquote(CONF *conf, char *p)
682         {
683         int q= *p;
684
685         p++;
686         while (!(IS_EOF(conf,*p)))
687                 {
688                 if (*p == q)
689                         {
690                         if (*(p+1) == q)
691                                 {
692                                 p++;
693                                 }
694                         else
695                                 {
696                                 break;
697                                 }
698                         }
699                 p++;
700                 }
701         if (*p == q) p++;
702         return(p);
703         }
704
705 static void dump_value(CONF_VALUE *a, BIO *out)
706         {
707         if (a->name)
708                 BIO_printf(out, "[%s] %s=%s\n", a->section, a->name, a->value);
709         else
710                 BIO_printf(out, "[[%s]]\n", a->section);
711         }
712
713 static IMPLEMENT_LHASH_DOALL_ARG_FN(dump_value, CONF_VALUE *, BIO *)
714
715 static int def_dump(CONF *conf, BIO *out)
716         {
717         lh_doall_arg(conf->data, LHASH_DOALL_ARG_FN(dump_value), out);
718         return 1;
719         }
720
721 static int def_is_number(CONF *conf, char c)
722         {
723         return IS_NUMBER(conf,c);
724         }
725
726 static int def_to_int(CONF *conf, char c)
727         {
728         return c - '0';
729         }
730