summaryrefslogtreecommitdiff
path: root/lib/ASN1.y
blob: 66173ea034ad5d7921437c07e05dd3bb12925cdb (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
%{
/*
 * Copyright (C) 2001-2012 Free Software Foundation, Inc.
 *
 * This file is part of LIBTASN1.
 *
 * The LIBTASN1 library is free software; you can redistribute it
 * and/or modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA
 */

/*****************************************************/
/* File: x509_ASN.y                                  */
/* Description: input file for 'bison' program.      */
/*   The output file is a parser (in C language) for */
/*   ASN.1 syntax                                    */
/*****************************************************/

#include <int.h>
#include <parser_aux.h>
#include <structure.h>

static FILE *file_asn1;			/* Pointer to file to parse */
static asn1_retCode result_parse;	/* result of the parser
					   algorithm */
static ASN1_TYPE p_tree;		/* pointer to the root of the
					   structure created by the
					   parser*/
static unsigned long lineNumber;	/* line number describing the
					   parser position inside the
					   file */
static char lastToken[ASN1_MAX_NAME_SIZE+1];	/* last token find in the file
					   to parse before the 'parse
					   error' */
extern char _asn1_identifierMissing[];
static const char *fileName;		/* file to parse */

static int _asn1_yyerror (const char *);
static int _asn1_yylex(void);

%}

/* Prefix symbols and functions with _asn1_ */
%name-prefix="_asn1_yy"

%union {
  unsigned int constant;
  char str[ASN1_MAX_NAME_SIZE+1];
  ASN1_TYPE node;
}


%token ASSIG "::="
%token <str> NUM
%token <str> IDENTIFIER
%token OPTIONAL
%token INTEGER
%token SIZE
%token OCTET
%token STRING
%token SEQUENCE
%token BIT
%token UNIVERSAL
%token PRIVATE
%token APPLICATION
%token DEFAULT
%token CHOICE
%token OF
%token OBJECT
%token STR_IDENTIFIER
%token BOOLEAN
%token ASN1_TRUE
%token ASN1_FALSE
%token TOKEN_NULL
%token ANY
%token DEFINED
%token BY
%token SET
%token EXPLICIT
%token IMPLICIT
%token DEFINITIONS
%token TAGS
%token BEGIN
%token END
%token UTCTime
%token GeneralizedTime
%token GeneralString
%token FROM
%token IMPORTS
%token ENUMERATED

%type <node> octet_string_def constant constant_list type_assig_right
%type <node> integer_def type_assig type_assig_list sequence_def type_def
%type <node> bit_string_def default size_def choise_def object_def
%type <node> boolean_def any_def size_def2 obj_constant obj_constant_list
%type <node> constant_def type_constant type_constant_list definitions
%type <node> definitions_id Time bit_element bit_element_list set_def
%type <node> tag_type tag type_assig_right_tag generalstring_def
%type <node> type_assig_right_tag_default enumerated_def
%type <str>  pos_num neg_num pos_neg_num pos_neg_identifier pos_neg_list
%type <str>  num_identifier
%type <constant> class explicit_implicit

%%


definitions:   definitions_id
               DEFINITIONS explicit_implicit TAGS "::=" BEGIN  /* imports_def */
               type_constant_list END
                   {$$=_asn1_add_static_node(TYPE_DEFINITIONS|$3);
                    _asn1_set_name($$,_asn1_get_name($1));
                    _asn1_set_name($1,"");
                    _asn1_set_right($1,$7);
                    _asn1_set_down($$,$1);

		    p_tree=$$;
		    }
;

pos_num :   NUM       {strcpy($$,$1);}
          | '+' NUM   {strcpy($$,$2);}
;

neg_num : '-' NUM     {strcpy($$,"-");
                       strcat($$,$2);}
;

pos_neg_num :  pos_num  {strcpy($$,$1);}
             | neg_num  {strcpy($$,$1);}
;

num_identifier :  NUM            {strcpy($$,$1);}
                | IDENTIFIER     {strcpy($$,$1);}
;

pos_neg_identifier :  pos_neg_num    {strcpy($$,$1);}
                    | IDENTIFIER     {strcpy($$,$1);}
;

constant: '(' pos_neg_num ')'         {$$=_asn1_add_static_node(TYPE_CONSTANT);
                                       _asn1_set_value($$,$2,strlen($2)+1);}
        | IDENTIFIER'('pos_neg_num')' {$$=_asn1_add_static_node(TYPE_CONSTANT);
	                               _asn1_set_name($$,$1);
                                       _asn1_set_value($$,$3,strlen($3)+1);}
;

constant_list:  constant                   {$$=$1;}
              | constant_list ',' constant {$$=$1;
                                            _asn1_set_right(_asn1_get_last_right($1),$3);}
;

obj_constant:  num_identifier     {$$=_asn1_add_static_node(TYPE_CONSTANT);
                                   _asn1_set_value($$,$1,strlen($1)+1);}
             | IDENTIFIER'('NUM')' {$$=_asn1_add_static_node(TYPE_CONSTANT);
	                            _asn1_set_name($$,$1);
                                    _asn1_set_value($$,$3,strlen($3)+1);}
;

obj_constant_list:  obj_constant                   {$$=$1;}
                  | obj_constant_list obj_constant {$$=$1;
                                                    _asn1_set_right(_asn1_get_last_right($1),$2);}
;

class :  UNIVERSAL    {$$=CONST_UNIVERSAL;}
       | PRIVATE      {$$=CONST_PRIVATE;}
       | APPLICATION  {$$=CONST_APPLICATION;}
;

tag_type :  '[' NUM ']'    {$$=_asn1_add_static_node(TYPE_TAG);
                            _asn1_set_value($$,$2,strlen($2)+1);}
          | '[' class NUM ']'  {$$=_asn1_add_static_node(TYPE_TAG | $2);
                                _asn1_set_value($$,$3,strlen($3)+1);}
;

tag :  tag_type           {$$=$1;}
     | tag_type EXPLICIT  {$$=_asn1_mod_type($1,CONST_EXPLICIT);}
     | tag_type IMPLICIT  {$$=_asn1_mod_type($1,CONST_IMPLICIT);}
;

default :  DEFAULT pos_neg_identifier {$$=_asn1_add_static_node(TYPE_DEFAULT);
                                       _asn1_set_value($$,$2,strlen($2)+1);}
         | DEFAULT ASN1_TRUE           {$$=_asn1_add_static_node(TYPE_DEFAULT|CONST_TRUE);}
         | DEFAULT ASN1_FALSE          {$$=_asn1_add_static_node(TYPE_DEFAULT|CONST_FALSE);}
;


pos_neg_list:  pos_neg_num
            |  pos_neg_list '|' pos_neg_num
;


integer_def: INTEGER                    {$$=_asn1_add_static_node(TYPE_INTEGER);}
           | INTEGER'{'constant_list'}' {$$=_asn1_add_static_node(TYPE_INTEGER|CONST_LIST);
	                                 _asn1_set_down($$,$3);}
           | integer_def'(' pos_neg_list ')' {$$=_asn1_add_static_node(TYPE_INTEGER);}
           | integer_def'('num_identifier'.''.'num_identifier')'
                                        {$$=_asn1_add_static_node(TYPE_INTEGER|CONST_MIN_MAX);
                                         _asn1_set_down($$,_asn1_add_static_node(TYPE_SIZE));
                                         _asn1_set_value(_asn1_get_down($$),$6,strlen($6)+1);
                                         _asn1_set_name(_asn1_get_down($$),$3);}
;

boolean_def: BOOLEAN   {$$=_asn1_add_static_node(TYPE_BOOLEAN);}
;

Time:   UTCTime          {$$=_asn1_add_static_node(TYPE_TIME|CONST_UTC);}
      | GeneralizedTime  {$$=_asn1_add_static_node(TYPE_TIME|CONST_GENERALIZED);}
;

size_def2: SIZE'('num_identifier')'  {$$=_asn1_add_static_node(TYPE_SIZE|CONST_1_PARAM);
	                              _asn1_set_value($$,$3,strlen($3)+1);}
        | SIZE'('num_identifier'.''.'num_identifier')'
                                     {$$=_asn1_add_static_node(TYPE_SIZE|CONST_MIN_MAX);
	                              _asn1_set_value($$,$3,strlen($3)+1);
                                      _asn1_set_name($$,$6);}
;

size_def:   size_def2          {$$=$1;}
          | '(' size_def2 ')'  {$$=$2;}
;

generalstring_def: GeneralString {$$=_asn1_add_static_node(TYPE_GENERALSTRING);}
                | GeneralString size_def {$$=_asn1_add_static_node(TYPE_GENERALSTRING|CONST_SIZE);
					  _asn1_set_down($$,$2);}
;

octet_string_def : OCTET STRING           {$$=_asn1_add_static_node(TYPE_OCTET_STRING);}
                 | OCTET STRING size_def  {$$=_asn1_add_static_node(TYPE_OCTET_STRING|CONST_SIZE);
                                           _asn1_set_down($$,$3);}
;

bit_element :  IDENTIFIER'('NUM')' {$$=_asn1_add_static_node(TYPE_CONSTANT);
	                           _asn1_set_name($$,$1);
                                    _asn1_set_value($$,$3,strlen($3)+1);}
;

bit_element_list :  bit_element   {$$=$1;}
                  | bit_element_list ',' bit_element  {$$=$1;
                                                       _asn1_set_right(_asn1_get_last_right($1),$3);}
;

bit_string_def : BIT STRING    {$$=_asn1_add_static_node(TYPE_BIT_STRING);}
               | BIT STRING size_def {$$=_asn1_add_static_node(TYPE_BIT_STRING|CONST_SIZE);}
               | BIT STRING'{'bit_element_list'}'
                               {$$=_asn1_add_static_node(TYPE_BIT_STRING|CONST_LIST);
                                _asn1_set_down($$,$4);}
;

enumerated_def : ENUMERATED'{'bit_element_list'}'
                               {$$=_asn1_add_static_node(TYPE_ENUMERATED|CONST_LIST);
                                _asn1_set_down($$,$3);}
;


object_def :  OBJECT STR_IDENTIFIER {$$=_asn1_add_static_node(TYPE_OBJECT_ID);}
;

type_assig_right: IDENTIFIER          {$$=_asn1_add_static_node(TYPE_IDENTIFIER);
                                       _asn1_set_value($$,$1,strlen($1)+1);}
                | IDENTIFIER size_def {$$=_asn1_add_static_node(TYPE_IDENTIFIER|CONST_SIZE);
                                       _asn1_set_value($$,$1,strlen($1)+1);
                                       _asn1_set_down($$,$2);}
                | integer_def         {$$=$1;}
                | enumerated_def      {$$=$1;}
                | boolean_def         {$$=$1;}
                | Time
                | octet_string_def    {$$=$1;}
                | bit_string_def      {$$=$1;}
                | generalstring_def   {$$=$1;}
                | sequence_def        {$$=$1;}
                | object_def          {$$=$1;}
                | choise_def          {$$=$1;}
                | any_def             {$$=$1;}
                | set_def             {$$=$1;}
                | TOKEN_NULL          {$$=_asn1_add_static_node(TYPE_NULL);}
;

type_assig_right_tag :   type_assig_right     {$$=$1;}
                       | tag type_assig_right {$$=_asn1_mod_type($2,CONST_TAG);
                                               _asn1_set_right($1,_asn1_get_down($$));
                                               _asn1_set_down($$,$1);}
;

type_assig_right_tag_default : type_assig_right_tag   {$$=$1;}
                      | type_assig_right_tag default  {$$=_asn1_mod_type($1,CONST_DEFAULT);
                                                       _asn1_set_right($2,_asn1_get_down($$));
						       _asn1_set_down($$,$2);}
                      | type_assig_right_tag OPTIONAL {$$=_asn1_mod_type($1,CONST_OPTION);}
;

type_assig : IDENTIFIER type_assig_right_tag_default  {$$=_asn1_set_name($2,$1);}
;

type_assig_list : type_assig                   {$$=$1;}
                | type_assig_list','type_assig {$$=$1;
                                                _asn1_set_right(_asn1_get_last_right($1),$3);}
;

sequence_def : SEQUENCE'{'type_assig_list'}' {$$=_asn1_add_static_node(TYPE_SEQUENCE);
                                              _asn1_set_down($$,$3);}
   | SEQUENCE OF type_assig_right            {$$=_asn1_add_static_node(TYPE_SEQUENCE_OF);
                                              _asn1_set_down($$,$3);}
   | SEQUENCE size_def OF type_assig_right {$$=_asn1_add_static_node(TYPE_SEQUENCE_OF|CONST_SIZE);
                                            _asn1_set_right($2,$4);
                                            _asn1_set_down($$,$2);}
;

set_def :  SET'{'type_assig_list'}' {$$=_asn1_add_static_node(TYPE_SET);
                                     _asn1_set_down($$,$3);}
   | SET OF type_assig_right        {$$=_asn1_add_static_node(TYPE_SET_OF);
                                     _asn1_set_down($$,$3);}
   | SET size_def OF type_assig_right {$$=_asn1_add_static_node(TYPE_SET_OF|CONST_SIZE);
                                       _asn1_set_right($2,$4);
                                       _asn1_set_down($$,$2);}
;

choise_def :   CHOICE'{'type_assig_list'}'  {$$=_asn1_add_static_node(TYPE_CHOICE);
                                             _asn1_set_down($$,$3);}
;

any_def :  ANY                         {$$=_asn1_add_static_node(TYPE_ANY);}
         | ANY DEFINED BY IDENTIFIER   {$$=_asn1_add_static_node(TYPE_ANY|CONST_DEFINED_BY);
                                        _asn1_set_down($$,_asn1_add_static_node(TYPE_CONSTANT));
	                                _asn1_set_name(_asn1_get_down($$),$4);}
;

type_def : IDENTIFIER "::=" type_assig_right_tag  {$$=_asn1_set_name($3,$1);}
;

constant_def :  IDENTIFIER OBJECT STR_IDENTIFIER "::=" '{'obj_constant_list'}'
                        {$$=_asn1_add_static_node(TYPE_OBJECT_ID|CONST_ASSIGN);
                         _asn1_set_name($$,$1);
                         _asn1_set_down($$,$6);}
              | IDENTIFIER IDENTIFIER "::=" '{' obj_constant_list '}'
                        {$$=_asn1_add_static_node(TYPE_OBJECT_ID|CONST_ASSIGN|CONST_1_PARAM);
                         _asn1_set_name($$,$1);
                         _asn1_set_value($$,$2,strlen($2)+1);
                         _asn1_set_down($$,$5);}
              | IDENTIFIER INTEGER "::=" pos_neg_num
                        {$$=_asn1_add_static_node(TYPE_INTEGER|CONST_ASSIGN);
                         _asn1_set_name($$,$1);
                         _asn1_set_value($$,$4,strlen($4)+1);}
;

type_constant:   type_def     {$$=$1;}
               | constant_def {$$=$1;}
;

type_constant_list :   type_constant    {$$=$1;}
                     | type_constant_list type_constant  {$$=$1;
                                                          _asn1_set_right(_asn1_get_last_right($1),$2);}
;

definitions_id  :  IDENTIFIER  '{' obj_constant_list '}' {$$=_asn1_add_static_node(TYPE_OBJECT_ID);
                                                          _asn1_set_down($$,$3);
                                                          _asn1_set_name($$,$1);}
                 | IDENTIFIER  '{' '}'                   {$$=_asn1_add_static_node(TYPE_OBJECT_ID);
                                                          _asn1_set_name($$,$1);}
;

/*
identifier_list  :  IDENTIFIER  {$$=_asn1_add_static_node(TYPE_IDENTIFIER);
                                 _asn1_set_name($$,$1);}
                  | identifier_list IDENTIFIER
                                {$$=$1;
                                 _asn1_set_right(_asn1_get_last_right($$),_asn1_add_static_node(TYPE_IDENTIFIER));
                                 _asn1_set_name(_asn1_get_last_right($$),$2);}
;


imports_def :    empty   {$$=NULL;}
              | IMPORTS identifier_list FROM IDENTIFIER obj_constant_list
                        {$$=_asn1_add_static_node(TYPE_IMPORTS);
                         _asn1_set_down($$,_asn1_add_static_node(TYPE_OBJECT_ID));
                         _asn1_set_name(_asn1_get_down($$),$4);
                         _asn1_set_down(_asn1_get_down($$),$5);
                         _asn1_set_right($$,$2);}
;
*/

explicit_implicit :  EXPLICIT  {$$=CONST_EXPLICIT;}
                   | IMPLICIT  {$$=CONST_IMPLICIT;}
;


%%



static const char *key_word[] = {
  "::=","OPTIONAL","INTEGER","SIZE","OCTET","STRING"
  ,"SEQUENCE","BIT","UNIVERSAL","PRIVATE","OPTIONAL"
  ,"DEFAULT","CHOICE","OF","OBJECT","IDENTIFIER"
  ,"BOOLEAN","TRUE","FALSE","APPLICATION","ANY","DEFINED"
  ,"SET","BY","EXPLICIT","IMPLICIT","DEFINITIONS","TAGS"
  ,"BEGIN","END","UTCTime","GeneralizedTime"
  ,"GeneralString","FROM","IMPORTS","NULL","ENUMERATED"};
static const int key_word_token[] = {
  ASSIG,OPTIONAL,INTEGER,SIZE,OCTET,STRING
  ,SEQUENCE,BIT,UNIVERSAL,PRIVATE,OPTIONAL
  ,DEFAULT,CHOICE,OF,OBJECT,STR_IDENTIFIER
  ,BOOLEAN,ASN1_TRUE,ASN1_FALSE,APPLICATION,ANY,DEFINED
  ,SET,BY,EXPLICIT,IMPLICIT,DEFINITIONS,TAGS
  ,BEGIN,END,UTCTime,GeneralizedTime
  ,GeneralString,FROM,IMPORTS,TOKEN_NULL,ENUMERATED};

/*************************************************************/
/*  Function: _asn1_yylex                                    */
/*  Description: looks for tokens in file_asn1 pointer file. */
/*  Return: int                                              */
/*    Token identifier or ASCII code or 0(zero: End Of File) */
/*************************************************************/
static int
_asn1_yylex()
{
  int c,counter=0,k,lastc;
  char string[ASN1_MAX_NAME_SIZE+1]; /* will contain the next token */
  size_t i;

  while(1)
    {
    while((c=fgetc(file_asn1))==' ' || c=='\t' || c=='\n')
      if(c=='\n') lineNumber++;

    if(c==EOF){
      strcpy(lastToken,"End Of File");
      return 0;
    }

    if(c=='(' || c==')' || c=='[' || c==']' ||
       c=='{' || c=='}' || c==',' || c=='.' ||
       c=='+' || c=='|'){
      lastToken[0]=c;lastToken[1]=0;
      return c;
    }
    if(c=='-'){  /* Maybe the first '-' of a comment */
      if((c=fgetc(file_asn1))!='-'){
	ungetc(c,file_asn1);
	lastToken[0]='-';lastToken[1]=0;
	return '-';
      }
      else{ /* Comments */
	lastc=0;
	counter=0;
	/* A comment finishes at the next double hypen or the end of line */
	while((c=fgetc(file_asn1))!=EOF && c!='\n' &&
	      (lastc!='-' || (lastc=='-' && c!='-')))
	  lastc=c;
	if(c==EOF){
	  strcpy(lastToken,"End Of File");
	  return 0;
	}
	else{
	  if(c=='\n') lineNumber++;
	  continue; /* next char, please! (repeat the search) */
	}
      }
    }
    string[counter++]=c;
    /* Till the end of the token */
    while(!((c=fgetc(file_asn1))==EOF || c==' '|| c=='\t' || c=='\n' ||
	     c=='(' || c==')' || c=='[' || c==']' ||
	     c=='{' || c=='}' || c==',' || c=='.'))
      {
	if(counter>=ASN1_MAX_NAME_SIZE){
	  result_parse=ASN1_NAME_TOO_LONG;
	  return 0;
	}
	string[counter++]=c;
      }
    ungetc(c,file_asn1);
    string[counter]=0;
    strcpy(lastToken,string);

    /* Is STRING a number? */
    for(k=0;k<counter;k++)
      if(!isdigit(string[k])) break;
    if(k>=counter)
      {
      strcpy(yylval.str,string);
      return NUM; /* return the number */
      }

    /* Is STRING a keyword? */
    for(i=0;i<(sizeof(key_word)/sizeof(char*));i++)
      if(!strcmp(string,key_word[i])) return key_word_token[i];

    /* STRING is an IDENTIFIER */
    strcpy(yylval.str,string);
    return IDENTIFIER;
    }
}

/*************************************************************/
/*  Function: _asn1_create_errorDescription                  */
/*  Description: creates a string with the description of the*/
/*    error.                                                 */
/*  Parameters:                                              */
/*    error : error to describe.                             */
/*    errorDescription: string that will contain the         */
/*                      description.                         */
/*************************************************************/
static void
_asn1_create_errorDescription(int error,char *errorDescription)
{
  switch(error){
  case ASN1_SUCCESS: case ASN1_FILE_NOT_FOUND:
    if (errorDescription!=NULL) errorDescription[0]=0;
    break;
  case ASN1_SYNTAX_ERROR:
    if (errorDescription!=NULL) {
	strcpy(errorDescription,fileName);
	strcat(errorDescription,":");
	_asn1_ltostr(lineNumber,errorDescription+strlen(fileName)+1);
	strcat(errorDescription,": parse error near '");
	strcat(errorDescription,lastToken);
	strcat(errorDescription,"'");
    }
    break;
  case ASN1_NAME_TOO_LONG:
    if (errorDescription!=NULL) {
       strcpy(errorDescription,fileName);
       strcat(errorDescription,":");
       _asn1_ltostr(lineNumber,errorDescription+strlen(fileName)+1);
       strcat(errorDescription,": name too long (more than ");
       _asn1_ltostr(ASN1_MAX_NAME_SIZE,errorDescription+strlen(errorDescription));
       strcat(errorDescription," characters)");
    }
    break;
  case ASN1_IDENTIFIER_NOT_FOUND:
    if (errorDescription!=NULL) {
       strcpy(errorDescription,fileName);
       strcat(errorDescription,":");
       strcat(errorDescription,": identifier '");
       strcat(errorDescription,_asn1_identifierMissing);
       strcat(errorDescription,"' not found");
    }
    break;
  default:
    if (errorDescription!=NULL) errorDescription[0]=0;
    break;
  }

}

/**
 * asn1_parser2tree:
 * @file_name: specify the path and the name of file that contains
 *   ASN.1 declarations.
 * @definitions: return the pointer to the structure created from
 *   "file_name" ASN.1 declarations.
 * @errorDescription: return the error description or an empty
 * string if success.
 *
 * Function used to start the parse algorithm.  Creates the structures
 * needed to manage the definitions included in @file_name file.
 *
 * Returns: %ASN1_SUCCESS if the file has a correct syntax and every
 *   identifier is known, %ASN1_ELEMENT_NOT_EMPTY if @definitions not
 *   %ASN1_TYPE_EMPTY, %ASN1_FILE_NOT_FOUND if an error occured while
 *   opening @file_name, %ASN1_SYNTAX_ERROR if the syntax is not
 *   correct, %ASN1_IDENTIFIER_NOT_FOUND if in the file there is an
 *   identifier that is not defined, %ASN1_NAME_TOO_LONG if in the
 *   file there is an identifier whith more than %ASN1_MAX_NAME_SIZE
 *   characters.
 **/
asn1_retCode
asn1_parser2tree(const char *file_name, ASN1_TYPE *definitions,
		 char *errorDescription){

  p_tree=ASN1_TYPE_EMPTY;

  if(*definitions != ASN1_TYPE_EMPTY)
    return ASN1_ELEMENT_NOT_EMPTY;

  *definitions=ASN1_TYPE_EMPTY;

  fileName = file_name;

  /* open the file to parse */
  file_asn1=fopen(file_name,"r");

  if(file_asn1==NULL){
    result_parse=ASN1_FILE_NOT_FOUND;
  }
  else{
    result_parse=ASN1_SUCCESS;

    lineNumber=1;
    yyparse();

    fclose(file_asn1);

    if(result_parse==ASN1_SUCCESS){ /* syntax OK */
      /* set IMPLICIT or EXPLICIT property */
      _asn1_set_default_tag(p_tree);
      /* set CONST_SET and CONST_NOT_USED */
      _asn1_type_set_config(p_tree);
      /* check the identifier definitions */
      result_parse=_asn1_check_identifier(p_tree);
      if(result_parse==ASN1_SUCCESS){ /* all identifier defined */
	/* Delete the list and keep the ASN1 structure */
	_asn1_delete_list();
	/* Convert into DER coding the value assign to INTEGER constants */
	_asn1_change_integer_value(p_tree);
	/* Expand the IDs of OBJECT IDENTIFIER constants */
	_asn1_expand_object_id(p_tree);

	*definitions=p_tree;
      }
      else /* some identifiers not defined */
	/* Delete the list and the ASN1 structure */
	_asn1_delete_list_and_nodes();
    }
    else  /* syntax error */
      /* Delete the list and the ASN1 structure */
      _asn1_delete_list_and_nodes();
  }

  if (errorDescription!=NULL)
	_asn1_create_errorDescription(result_parse,errorDescription);

  return result_parse;
}

/**
 * asn1_parser2array:
 * @inputFileName: specify the path and the name of file that
 *   contains ASN.1 declarations.
 * @outputFileName: specify the path and the name of file that will
 *   contain the C vector definition.
 * @vectorName: specify the name of the C vector.
 * @errorDescription : return the error description or an empty
 *   string if success.
 *
 * Function that generates a C structure from an ASN1 file.  Creates a
 * file containing a C vector to use to manage the definitions
 * included in @inputFileName file. If @inputFileName is
 * "/aa/bb/xx.yy" and @outputFileName is %NULL, the file created is
 * "/aa/bb/xx_asn1_tab.c".  If @vectorName is %NULL the vector name
 * will be "xx_asn1_tab".
 *
 * Returns: %ASN1_SUCCESS if the file has a correct syntax and every
 *   identifier is known, %ASN1_FILE_NOT_FOUND if an error occured
 *   while opening @inputFileName, %ASN1_SYNTAX_ERROR if the syntax is
 *   not correct, %ASN1_IDENTIFIER_NOT_FOUND if in the file there is
 *   an identifier that is not defined, %ASN1_NAME_TOO_LONG if in the
 *   file there is an identifier whith more than %ASN1_MAX_NAME_SIZE
 *   characters.
 **/
int asn1_parser2array(const char *inputFileName,const char *outputFileName,
		      const char *vectorName,char *errorDescription){
  char *file_out_name=NULL;
  char *vector_name=NULL;
  const char *char_p,*slash_p,*dot_p;

  p_tree=NULL;

  fileName = inputFileName;

  /* open the file to parse */
  file_asn1=fopen(inputFileName,"r");

  if(file_asn1==NULL)
    result_parse=ASN1_FILE_NOT_FOUND;
  else{
    result_parse=ASN1_SUCCESS;

    lineNumber=1;
    yyparse();

    fclose(file_asn1);

    if(result_parse==ASN1_SUCCESS){ /* syntax OK */
      /* set IMPLICIT or EXPLICIT property */
      _asn1_set_default_tag(p_tree);
      /* set CONST_SET and CONST_NOT_USED */
      _asn1_type_set_config(p_tree);
      /* check the identifier definitions */
      result_parse=_asn1_check_identifier(p_tree);

      if(result_parse==ASN1_SUCCESS){ /* all identifier defined */

	/* searching the last '/' and '.' in inputFileName */
	char_p=inputFileName;
	slash_p=inputFileName;
	while((char_p=strchr(char_p,'/'))){
	  char_p++;
	  slash_p=char_p;
	}

	char_p=slash_p;
	dot_p=inputFileName+strlen(inputFileName);

	while((char_p=strchr(char_p,'.'))){
	  dot_p=char_p;
	  char_p++;
	}

	if(outputFileName == NULL){
	  /* file_out_name = inputFileName + _asn1_tab.c */
	  file_out_name=malloc(dot_p-inputFileName+1+
				       strlen("_asn1_tab.c"));
	  memcpy(file_out_name,inputFileName,dot_p-inputFileName);
	  file_out_name[dot_p-inputFileName]=0;
	  strcat(file_out_name,"_asn1_tab.c");
	}
	else{
	  /* file_out_name = inputFileName */
	  file_out_name=(char *)malloc(strlen(outputFileName)+1);
	  strcpy(file_out_name,outputFileName);
	}

	if(vectorName == NULL){
	  /* vector_name = file name + _asn1_tab */
	  vector_name=malloc(dot_p-slash_p+1+
				     strlen("_asn1_tab"));
	  memcpy(vector_name,slash_p,dot_p-slash_p);
	  vector_name[dot_p-slash_p]=0;
	  strcat(vector_name,"_asn1_tab");
	}
	else{
	  /* vector_name = vectorName */
	  vector_name=(char *)malloc(strlen(vectorName)+1);
	  strcpy(vector_name,vectorName);
	}

	/* Save structure in a file */
	_asn1_create_static_structure(p_tree,
				      file_out_name,vector_name);

	free(file_out_name);
	free(vector_name);
      } /* result == OK */
    }   /* result == OK */

    /* Delete the list and the ASN1 structure */
    _asn1_delete_list_and_nodes();
  } /* inputFile exist */

  if (errorDescription!=NULL)
	_asn1_create_errorDescription(result_parse,errorDescription);

  return result_parse;
}

/*************************************************************/
/*  Function: _asn1_yyerror                                  */
/*  Description: function called when there are syntax errors*/
/*  Parameters:                                              */
/*    char *s : error description                            */
/*  Return: int                                              */
/*                                                           */
/*************************************************************/
static int _asn1_yyerror (const char *s)
{
  /* Sends the error description to the std_out */

#if 0
  printf("_asn1_yyerror:%s:%ld: %s (Last Token:'%s')\n",fileName,
	 lineNumber,s,lastToken);
#endif

  if(result_parse!=ASN1_NAME_TOO_LONG)
    result_parse=ASN1_SYNTAX_ERROR;

  return 0;
}