~ubuntu-branches/ubuntu/lucid/libtasn1-3/lucid-security

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
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
/*
 * Copyright (C) 2000, 2001, 2004, 2006, 2007, 2008, 2009, 2010 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
 */

#include <int.h>
#include "parser_aux.h"
#include "gstr.h"
#include "structure.h"
#include "element.h"

char _asn1_identifierMissing[ASN1_MAX_NAME_SIZE + 1];	/* identifier name not found */

/***********************************************/
/* Type: list_type                             */
/* Description: type used in the list during   */
/* the structure creation.                     */
/***********************************************/
typedef struct list_struct
{
  ASN1_TYPE node;
  struct list_struct *next;
} list_type;


/* Pointer to the first element of the list */
list_type *firstElement = NULL;

/******************************************************/
/* Function : _asn1_add_node                          */
/* Description: creates a new NODE_ASN element and    */
/* puts it in the list pointed by firstElement.       */
/* Parameters:                                        */
/*   type: type of the new element (see TYPE_         */
/*         and CONST_ constants).                     */
/* Return: pointer to the new element.                */
/******************************************************/
ASN1_TYPE
_asn1_add_node (unsigned int type)
{
  list_type *listElement;
  ASN1_TYPE punt;

  punt = (ASN1_TYPE) _asn1_calloc (1, sizeof (struct node_asn_struct));
  if (punt == NULL)
    return NULL;

  listElement = (list_type *) _asn1_malloc (sizeof (list_type));
  if (listElement == NULL)
    {
      _asn1_free (punt);
      return NULL;
    }

  listElement->node = punt;
  listElement->next = firstElement;
  firstElement = listElement;

  punt->type = type;

  return punt;
}

/**
 * asn1_find_node:
 * @pointer: NODE_ASN element pointer.
 * @name: null terminated string with the element's name to find.
 *
 * Searches for an element called NAME starting from POINTER.  The
 * name is composed by differents identifiers separated by dots.  When
 * *POINTER has a name, the first identifier must be the name of
 * *POINTER, otherwise it must be the name of one child of *POINTER.
 *
 * Return value: the searching result. NULL if not found.
 **/
ASN1_TYPE
asn1_find_node (ASN1_TYPE pointer, const char *name)
{
  ASN1_TYPE p;
  char *n_end, n[ASN1_MAX_NAME_SIZE + 1];
  const char *n_start;

  if (pointer == NULL)
    return NULL;

  if (name == NULL)
    return NULL;

  p = pointer;
  n_start = name;

  if (p->name != NULL)
    {				/* has *pointer got a name ? */
      n_end = strchr (n_start, '.');	/* search the first dot */
      if (n_end)
	{
	  memcpy (n, n_start, n_end - n_start);
	  n[n_end - n_start] = 0;
	  n_start = n_end;
	  n_start++;
	}
      else
	{
	  _asn1_str_cpy (n, sizeof (n), n_start);
	  n_start = NULL;
	}

      while (p)
	{
	  if ((p->name) && (!strcmp (p->name, n)))
	    break;
	  else
	    p = p->right;
	}			/* while */

      if (p == NULL)
	return NULL;
    }
  else
    {				/* *pointer doesn't have a name */
      if (n_start[0] == 0)
	return p;
    }

  while (n_start)
    {				/* Has the end of NAME been reached? */
      n_end = strchr (n_start, '.');	/* search the next dot */
      if (n_end)
	{
	  memcpy (n, n_start, n_end - n_start);
	  n[n_end - n_start] = 0;
	  n_start = n_end;
	  n_start++;
	}
      else
	{
	  _asn1_str_cpy (n, sizeof (n), n_start);
	  n_start = NULL;
	}

      if (p->down == NULL)
	return NULL;

      p = p->down;

      /* The identifier "?LAST" indicates the last element 
         in the right chain. */
      if (!strcmp (n, "?LAST"))
	{
	  if (p == NULL)
	    return NULL;
	  while (p->right)
	    p = p->right;
	}
      else
	{			/* no "?LAST" */
	  while (p)
	    {
	      if ((p->name) && (!strcmp (p->name, n)))
		break;
	      else
		p = p->right;
	    }
	  if (p == NULL)
	    return NULL;
	}
    }				/* while */

  return p;
}


/******************************************************************/
/* Function : _asn1_set_value                                     */
/* Description: sets the field VALUE in a NODE_ASN element. The   */
/*              previous value (if exist) will be lost            */
/* Parameters:                                                    */
/*   node: element pointer.                                       */
/*   value: pointer to the value that you want to set.            */
/*   len: character number of value.                              */
/* Return: pointer to the NODE_ASN element.                       */
/******************************************************************/
ASN1_TYPE
_asn1_set_value (ASN1_TYPE node, const void *value, unsigned int len)
{
  if (node == NULL)
    return node;
  if (node->value)
    {
      if (node->value != node->small_value)
	_asn1_free (node->value);
      node->value = NULL;
      node->value_len = 0;
    }

  if (!len)
    return node;

  if (len < sizeof (node->small_value))
    {
      node->value = node->small_value;
    }
  else
    {
      node->value = _asn1_malloc (len);
      if (node->value == NULL)
	return NULL;
    }
  node->value_len = len;

  memcpy (node->value, value, len);
  return node;
}

/******************************************************************/
/* Function : _asn1_set_value_octet                               */
/* Description: sets the field VALUE in a NODE_ASN element. The   */
/*              previous value (if exist) will be lost. The value */
/*		given is stored as an octet string.               */
/* Parameters:                                                    */
/*   node: element pointer.                                       */
/*   value: pointer to the value that you want to set.            */
/*   len: character number of value.                              */
/* Return: pointer to the NODE_ASN element.                       */
/******************************************************************/
ASN1_TYPE
_asn1_set_value_octet (ASN1_TYPE node, const void *value, unsigned int len)
{
  int len2;
  void *temp;

  if (node == NULL)
    return node;

  asn1_length_der (len, NULL, &len2);
  temp = (unsigned char *) _asn1_malloc (len + len2);
  if (temp == NULL)
    return NULL;

  asn1_octet_der (value, len, temp, &len2);
  return _asn1_set_value_m (node, temp, len2);
}

/* the same as _asn1_set_value except that it sets an already malloc'ed
 * value.
 */
ASN1_TYPE
_asn1_set_value_m (ASN1_TYPE node, void *value, unsigned int len)
{
  if (node == NULL)
    return node;

  if (node->value)
    {
      if (node->value != node->small_value)
	_asn1_free (node->value);
      node->value = NULL;
      node->value_len = 0;
    }

  if (!len)
    return node;

  node->value = value;
  node->value_len = len;

  return node;
}

/******************************************************************/
/* Function : _asn1_append_value                                  */
/* Description: appends to the field VALUE in a NODE_ASN element. */
/*							          */
/* Parameters:                                                    */
/*   node: element pointer.                                       */
/*   value: pointer to the value that you want to be appended.    */
/*   len: character number of value.                              */
/* Return: pointer to the NODE_ASN element.                       */
/******************************************************************/
ASN1_TYPE
_asn1_append_value (ASN1_TYPE node, const void *value, unsigned int len)
{
  if (node == NULL)
    return node;
  if (node->value != NULL && node->value != node->small_value)
    {
      /* value is allocated */
      int prev_len = node->value_len;
      node->value_len += len;
      node->value = _asn1_realloc (node->value, node->value_len);
      if (node->value == NULL)
	{
	  node->value_len = 0;
	  return NULL;
	}
      memcpy (&node->value[prev_len], value, len);

      return node;
    }
  else if (node->value == node->small_value)
    {
      /* value is in node */
      int prev_len = node->value_len;
      node->value_len += len;
      node->value = _asn1_malloc (node->value_len);
      if (node->value == NULL)
	{
	  node->value_len = 0;
	  return NULL;
	}
      memcpy (node->value, node->small_value, prev_len);
      memcpy (&node->value[prev_len], value, len);

      return node;
    }
  else				/* node->value == NULL */
    return _asn1_set_value (node, value, len);
}

/******************************************************************/
/* Function : _asn1_set_name                                      */
/* Description: sets the field NAME in a NODE_ASN element. The    */
/*              previous value (if exist) will be lost            */
/* Parameters:                                                    */
/*   node: element pointer.                                       */
/*   name: a null terminated string with the name that you want   */
/*         to set.                                                */
/* Return: pointer to the NODE_ASN element.                       */
/******************************************************************/
ASN1_TYPE
_asn1_set_name (ASN1_TYPE node, const char *name)
{
  if (node == NULL)
    return node;

  if (node->name)
    {
      _asn1_free (node->name);
      node->name = NULL;
    }

  if (name == NULL)
    return node;

  if (strlen (name))
    {
      node->name = (char *) _asn1_strdup (name);
      if (node->name == NULL)
	return NULL;
    }
  else
    node->name = NULL;
  return node;
}

/******************************************************************/
/* Function : _asn1_set_right                                     */
/* Description: sets the field RIGHT in a NODE_ASN element.       */
/* Parameters:                                                    */
/*   node: element pointer.                                       */
/*   right: pointer to a NODE_ASN element that you want be pointed*/
/*          by NODE.                                              */
/* Return: pointer to *NODE.                                      */
/******************************************************************/
ASN1_TYPE
_asn1_set_right (ASN1_TYPE node, ASN1_TYPE right)
{
  if (node == NULL)
    return node;
  node->right = right;
  if (right)
    right->left = node;
  return node;
}

/******************************************************************/
/* Function : _asn1_get_right                                     */
/* Description: returns the element pointed by the RIGHT field of */
/*              a NODE_ASN element.                               */
/* Parameters:                                                    */
/*   node: NODE_ASN element pointer.                              */
/* Return: field RIGHT of NODE.                                   */
/******************************************************************/
ASN1_TYPE
_asn1_get_right (ASN1_TYPE node)
{
  if (node == NULL)
    return NULL;
  return node->right;
}

/******************************************************************/
/* Function : _asn1_get_last_right                                */
/* Description: return the last element along the right chain.    */
/* Parameters:                                                    */
/*   node: starting element pointer.                              */
/* Return: pointer to the last element along the right chain.     */
/******************************************************************/
ASN1_TYPE
_asn1_get_last_right (ASN1_TYPE node)
{
  ASN1_TYPE p;

  if (node == NULL)
    return NULL;
  p = node;
  while (p->right)
    p = p->right;
  return p;
}

/******************************************************************/
/* Function : _asn1_set_down                                      */
/* Description: sets the field DOWN in a NODE_ASN element.        */
/* Parameters:                                                    */
/*   node: element pointer.                                       */
/*   down: pointer to a NODE_ASN element that you want be pointed */
/*          by NODE.                                              */
/* Return: pointer to *NODE.                                      */
/******************************************************************/
ASN1_TYPE
_asn1_set_down (ASN1_TYPE node, ASN1_TYPE down)
{
  if (node == NULL)
    return node;
  node->down = down;
  if (down)
    down->left = node;
  return node;
}

/******************************************************************/
/* Function : _asn1_get_down                                      */
/* Description: returns the element pointed by the DOWN field of  */
/*              a NODE_ASN element.                               */
/* Parameters:                                                    */
/*   node: NODE_ASN element pointer.                              */
/* Return: field DOWN of NODE.                                    */
/******************************************************************/
ASN1_TYPE
_asn1_get_down (ASN1_TYPE node)
{
  if (node == NULL)
    return NULL;
  return node->down;
}

/******************************************************************/
/* Function : _asn1_get_name                                      */
/* Description: returns the name of a NODE_ASN element.           */
/* Parameters:                                                    */
/*   node: NODE_ASN element pointer.                              */
/* Return: a null terminated string.                              */
/******************************************************************/
char *
_asn1_get_name (ASN1_TYPE node)
{
  if (node == NULL)
    return NULL;
  return node->name;
}

/******************************************************************/
/* Function : _asn1_mod_type                                      */
/* Description: change the field TYPE of an NODE_ASN element.     */
/*              The new value is the old one | (bitwise or) the   */
/*              paramener VALUE.                                  */
/* Parameters:                                                    */
/*   node: NODE_ASN element pointer.                              */
/*   value: the integer value that must be or-ed with the current */
/*          value of field TYPE.                                  */
/* Return: NODE pointer.                                          */
/******************************************************************/
ASN1_TYPE
_asn1_mod_type (ASN1_TYPE node, unsigned int value)
{
  if (node == NULL)
    return node;
  node->type |= value;
  return node;
}


/******************************************************************/
/* Function : _asn1_remove_node                                   */
/* Description: gets free the memory allocated for an NODE_ASN    */
/*              element (not the elements pointed by it).         */
/* Parameters:                                                    */
/*   node: NODE_ASN element pointer.                              */
/******************************************************************/
void
_asn1_remove_node (ASN1_TYPE node)
{
  if (node == NULL)
    return;

  if (node->name != NULL)
    _asn1_free (node->name);
  if (node->value != NULL && node->value != node->small_value)
    _asn1_free (node->value);
  _asn1_free (node);
}

/******************************************************************/
/* Function : _asn1_find_up                                       */
/* Description: return the father of the NODE_ASN element.        */
/* Parameters:                                                    */
/*   node: NODE_ASN element pointer.                              */
/* Return: Null if not found.                                     */
/******************************************************************/
ASN1_TYPE
_asn1_find_up (ASN1_TYPE node)
{
  ASN1_TYPE p;

  if (node == NULL)
    return NULL;

  p = node;

  while ((p->left != NULL) && (p->left->right == p))
    p = p->left;

  return p->left;
}

/******************************************************************/
/* Function : _asn1_delete_list                                   */
/* Description: deletes the list elements (not the elements       */
/*  pointed by them).                                             */
/******************************************************************/
void
_asn1_delete_list (void)
{
  list_type *listElement;

  while (firstElement)
    {
      listElement = firstElement;
      firstElement = firstElement->next;
      _asn1_free (listElement);
    }
}

/******************************************************************/
/* Function : _asn1_delete_list_and nodes                         */
/* Description: deletes the list elements and the elements        */
/*  pointed by them.                                              */
/******************************************************************/
void
_asn1_delete_list_and_nodes (void)
{
  list_type *listElement;

  while (firstElement)
    {
      listElement = firstElement;
      firstElement = firstElement->next;
      _asn1_remove_node (listElement->node);
      _asn1_free (listElement);
    }
}


char *
_asn1_ltostr (long v, char *str)
{
  long d, r;
  char temp[20];
  int count, k, start;

  if (v < 0)
    {
      str[0] = '-';
      start = 1;
      v = -v;
    }
  else
    start = 0;

  count = 0;
  do
    {
      d = v / 10;
      r = v - d * 10;
      temp[start + count] = '0' + (char) r;
      count++;
      v = d;
    }
  while (v);

  for (k = 0; k < count; k++)
    str[k + start] = temp[start + count - k - 1];
  str[count + start] = 0;
  return str;
}


/******************************************************************/
/* Function : _asn1_change_integer_value                          */
/* Description: converts into DER coding the value assign to an   */
/*   INTEGER constant.                                            */
/* Parameters:                                                    */
/*   node: root of an ASN1element.                                */
/* Return:                                                        */
/*   ASN1_ELEMENT_NOT_FOUND if NODE is NULL,                       */
/*   otherwise ASN1_SUCCESS                                             */
/******************************************************************/
asn1_retCode
_asn1_change_integer_value (ASN1_TYPE node)
{
  ASN1_TYPE p;
  unsigned char val[SIZEOF_UNSIGNED_LONG_INT];
  unsigned char val2[SIZEOF_UNSIGNED_LONG_INT + 1];
  int len;

  if (node == NULL)
    return ASN1_ELEMENT_NOT_FOUND;

  p = node;
  while (p)
    {
      if ((type_field (p->type) == TYPE_INTEGER) && (p->type & CONST_ASSIGN))
	{
	  if (p->value)
	    {
	      _asn1_convert_integer (p->value, val, sizeof (val), &len);
	      asn1_octet_der (val, len, val2, &len);
	      _asn1_set_value (p, val2, len);
	    }
	}

      if (p->down)
	{
	  p = p->down;
	}
      else
	{
	  if (p == node)
	    p = NULL;
	  else if (p->right)
	    p = p->right;
	  else
	    {
	      while (1)
		{
		  p = _asn1_find_up (p);
		  if (p == node)
		    {
		      p = NULL;
		      break;
		    }
		  if (p->right)
		    {
		      p = p->right;
		      break;
		    }
		}
	    }
	}
    }

  return ASN1_SUCCESS;
}


/******************************************************************/
/* Function : _asn1_expand_object_id                              */
/* Description: expand the IDs of an OBJECT IDENTIFIER constant.  */
/* Parameters:                                                    */
/*   node: root of an ASN1 element.                               */
/* Return:                                                        */
/*   ASN1_ELEMENT_NOT_FOUND if NODE is NULL,                       */
/*   otherwise ASN1_SUCCESS                                             */
/******************************************************************/
asn1_retCode
_asn1_expand_object_id (ASN1_TYPE node)
{
  ASN1_TYPE p, p2, p3, p4, p5;
  char name_root[ASN1_MAX_NAME_SIZE], name2[2 * ASN1_MAX_NAME_SIZE + 1];
  int move, tlen;

  if (node == NULL)
    return ASN1_ELEMENT_NOT_FOUND;

  _asn1_str_cpy (name_root, sizeof (name_root), node->name);

  p = node;
  move = DOWN;

  while (!((p == node) && (move == UP)))
    {
      if (move != UP)
	{
	  if ((type_field (p->type) == TYPE_OBJECT_ID)
	      && (p->type & CONST_ASSIGN))
	    {
	      p2 = p->down;
	      if (p2 && (type_field (p2->type) == TYPE_CONSTANT))
		{
		  if (p2->value && !isdigit (p2->value[0]))
		    {
		      _asn1_str_cpy (name2, sizeof (name2), name_root);
		      _asn1_str_cat (name2, sizeof (name2), ".");
		      _asn1_str_cat (name2, sizeof (name2), p2->value);
		      p3 = asn1_find_node (node, name2);
		      if (!p3 || (type_field (p3->type) != TYPE_OBJECT_ID) ||
			  !(p3->type & CONST_ASSIGN))
			return ASN1_ELEMENT_NOT_FOUND;
		      _asn1_set_down (p, p2->right);
		      _asn1_remove_node (p2);
		      p2 = p;
		      p4 = p3->down;
		      while (p4)
			{
			  if (type_field (p4->type) == TYPE_CONSTANT)
			    {
			      p5 = _asn1_add_node_only (TYPE_CONSTANT);
			      _asn1_set_name (p5, p4->name);
			      tlen = strlen (p4->value);
			      if (tlen > 0)
				_asn1_set_value (p5, p4->value, tlen + 1);
			      if (p2 == p)
				{
				  _asn1_set_right (p5, p->down);
				  _asn1_set_down (p, p5);
				}
			      else
				{
				  _asn1_set_right (p5, p2->right);
				  _asn1_set_right (p2, p5);
				}
			      p2 = p5;
			    }
			  p4 = p4->right;
			}
		      move = DOWN;
		      continue;
		    }
		}
	    }
	  move = DOWN;
	}
      else
	move = RIGHT;

      if (move == DOWN)
	{
	  if (p->down)
	    p = p->down;
	  else
	    move = RIGHT;
	}

      if (p == node)
	{
	  move = UP;
	  continue;
	}

      if (move == RIGHT)
	{
	  if (p->right)
	    p = p->right;
	  else
	    move = UP;
	}
      if (move == UP)
	p = _asn1_find_up (p);
    }


  /*******************************/
  /*       expand DEFAULT        */
  /*******************************/
  p = node;
  move = DOWN;

  while (!((p == node) && (move == UP)))
    {
      if (move != UP)
	{
	  if ((type_field (p->type) == TYPE_OBJECT_ID) &&
	      (p->type & CONST_DEFAULT))
	    {
	      p2 = p->down;
	      if (p2 && (type_field (p2->type) == TYPE_DEFAULT))
		{
		  _asn1_str_cpy (name2, sizeof (name2), name_root);
		  _asn1_str_cat (name2, sizeof (name2), ".");
		  _asn1_str_cat (name2, sizeof (name2), p2->value);
		  p3 = asn1_find_node (node, name2);
		  if (!p3 || (type_field (p3->type) != TYPE_OBJECT_ID) ||
		      !(p3->type & CONST_ASSIGN))
		    return ASN1_ELEMENT_NOT_FOUND;
		  p4 = p3->down;
		  name2[0] = 0;
		  while (p4)
		    {
		      if (type_field (p4->type) == TYPE_CONSTANT)
			{
			  if (name2[0])
			    _asn1_str_cat (name2, sizeof (name2), ".");
			  _asn1_str_cat (name2, sizeof (name2), p4->value);
			}
		      p4 = p4->right;
		    }
		  tlen = strlen (name2);
		  if (tlen > 0)
		    _asn1_set_value (p2, name2, tlen + 1);
		}
	    }
	  move = DOWN;
	}
      else
	move = RIGHT;

      if (move == DOWN)
	{
	  if (p->down)
	    p = p->down;
	  else
	    move = RIGHT;
	}

      if (p == node)
	{
	  move = UP;
	  continue;
	}

      if (move == RIGHT)
	{
	  if (p->right)
	    p = p->right;
	  else
	    move = UP;
	}
      if (move == UP)
	p = _asn1_find_up (p);
    }

  return ASN1_SUCCESS;
}


/******************************************************************/
/* Function : _asn1_type_set_config                               */
/* Description: sets the CONST_SET and CONST_NOT_USED properties  */
/*   in the fields of the SET elements.                           */
/* Parameters:                                                    */
/*   node: root of an ASN1 element.                               */
/* Return:                                                        */
/*   ASN1_ELEMENT_NOT_FOUND if NODE is NULL,                       */
/*   otherwise ASN1_SUCCESS                                             */
/******************************************************************/
asn1_retCode
_asn1_type_set_config (ASN1_TYPE node)
{
  ASN1_TYPE p, p2;
  int move;

  if (node == NULL)
    return ASN1_ELEMENT_NOT_FOUND;

  p = node;
  move = DOWN;

  while (!((p == node) && (move == UP)))
    {
      if (move != UP)
	{
	  if (type_field (p->type) == TYPE_SET)
	    {
	      p2 = p->down;
	      while (p2)
		{
		  if (type_field (p2->type) != TYPE_TAG)
		    p2->type |= CONST_SET | CONST_NOT_USED;
		  p2 = p2->right;
		}
	    }
	  move = DOWN;
	}
      else
	move = RIGHT;

      if (move == DOWN)
	{
	  if (p->down)
	    p = p->down;
	  else
	    move = RIGHT;
	}

      if (p == node)
	{
	  move = UP;
	  continue;
	}

      if (move == RIGHT)
	{
	  if (p->right)
	    p = p->right;
	  else
	    move = UP;
	}
      if (move == UP)
	p = _asn1_find_up (p);
    }

  return ASN1_SUCCESS;
}


/******************************************************************/
/* Function : _asn1_check_identifier                              */
/* Description: checks the definitions of all the identifiers     */
/*   and the first element of an OBJECT_ID (e.g. {pkix 0 4}).     */
/*   The _asn1_identifierMissing global variable is filled if     */
/*   necessary.                                                   */
/* Parameters:                                                    */
/*   node: root of an ASN1 element.                               */
/* Return:                                                        */
/*   ASN1_ELEMENT_NOT_FOUND      if NODE is NULL,                 */
/*   ASN1_IDENTIFIER_NOT_FOUND   if an identifier is not defined, */
/*   otherwise ASN1_SUCCESS                                       */
/******************************************************************/
asn1_retCode
_asn1_check_identifier (ASN1_TYPE node)
{
  ASN1_TYPE p, p2;
  char name2[ASN1_MAX_NAME_SIZE * 2 + 2];

  if (node == NULL)
    return ASN1_ELEMENT_NOT_FOUND;

  p = node;
  while (p)
    {
      if (type_field (p->type) == TYPE_IDENTIFIER)
	{
	  _asn1_str_cpy (name2, sizeof (name2), node->name);
	  _asn1_str_cat (name2, sizeof (name2), ".");
	  _asn1_str_cat (name2, sizeof (name2), p->value);
	  p2 = asn1_find_node (node, name2);
	  if (p2 == NULL)
	    {
	      strcpy (_asn1_identifierMissing, p->value);
	      return ASN1_IDENTIFIER_NOT_FOUND;
	    }
	}
      else if ((type_field (p->type) == TYPE_OBJECT_ID) &&
	       (p->type & CONST_DEFAULT))
	{
	  p2 = p->down;
	  if (p2 && (type_field (p2->type) == TYPE_DEFAULT))
	    {
	      _asn1_str_cpy (name2, sizeof (name2), node->name);
	      _asn1_str_cat (name2, sizeof (name2), ".");
	      _asn1_str_cat (name2, sizeof (name2), p2->value);
	      strcpy (_asn1_identifierMissing, p2->value);
	      p2 = asn1_find_node (node, name2);
	      if (!p2 || (type_field (p2->type) != TYPE_OBJECT_ID) ||
		  !(p2->type & CONST_ASSIGN))
		return ASN1_IDENTIFIER_NOT_FOUND;
	      else
		_asn1_identifierMissing[0] = 0;
	    }
	}
      else if ((type_field (p->type) == TYPE_OBJECT_ID) &&
	       (p->type & CONST_ASSIGN))
	{
	  p2 = p->down;
	  if (p2 && (type_field (p2->type) == TYPE_CONSTANT))
	    {
	      if (p2->value && !isdigit (p2->value[0]))
		{
		  _asn1_str_cpy (name2, sizeof (name2), node->name);
		  _asn1_str_cat (name2, sizeof (name2), ".");
		  _asn1_str_cat (name2, sizeof (name2), p2->value);
		  strcpy (_asn1_identifierMissing, p2->value);
		  p2 = asn1_find_node (node, name2);
		  if (!p2 || (type_field (p2->type) != TYPE_OBJECT_ID) ||
		      !(p2->type & CONST_ASSIGN))
		    return ASN1_IDENTIFIER_NOT_FOUND;
		  else
		    _asn1_identifierMissing[0] = 0;
		}
	    }
	}

      if (p->down)
	{
	  p = p->down;
	}
      else if (p->right)
	p = p->right;
      else
	{
	  while (1)
	    {
	      p = _asn1_find_up (p);
	      if (p == node)
		{
		  p = NULL;
		  break;
		}
	      if (p->right)
		{
		  p = p->right;
		  break;
		}
	    }
	}
    }

  return ASN1_SUCCESS;
}


/******************************************************************/
/* Function : _asn1_set_default_tag                               */
/* Description: sets the default IMPLICIT or EXPLICIT property in */
/*   the tagged elements that don't have this declaration.        */
/* Parameters:                                                    */
/*   node: pointer to a DEFINITIONS element.                      */
/* Return:                                                        */
/*   ASN1_ELEMENT_NOT_FOUND if NODE is NULL or not a pointer to   */
/*     a DEFINITIONS element,                                     */
/*   otherwise ASN1_SUCCESS                                       */
/******************************************************************/
asn1_retCode
_asn1_set_default_tag (ASN1_TYPE node)
{
  ASN1_TYPE p;

  if ((node == NULL) || (type_field (node->type) != TYPE_DEFINITIONS))
    return ASN1_ELEMENT_NOT_FOUND;

  p = node;
  while (p)
    {
      if ((type_field (p->type) == TYPE_TAG) &&
	  !(p->type & CONST_EXPLICIT) && !(p->type & CONST_IMPLICIT))
	{
	  if (node->type & CONST_EXPLICIT)
	    p->type |= CONST_EXPLICIT;
	  else
	    p->type |= CONST_IMPLICIT;
	}

      if (p->down)
	{
	  p = p->down;
	}
      else if (p->right)
	p = p->right;
      else
	{
	  while (1)
	    {
	      p = _asn1_find_up (p);
	      if (p == node)
		{
		  p = NULL;
		  break;
		}
	      if (p->right)
		{
		  p = p->right;
		  break;
		}
	    }
	}
    }

  return ASN1_SUCCESS;
}



static const char *
parse_version_number (const char *s, int *number)
{
  int val = 0;

  if (*s == '0' && isdigit (s[1]))
    return NULL;		/* leading zeros are not allowed */
  for (; isdigit (*s); s++)
    {
      val *= 10;
      val += *s - '0';
    }
  *number = val;
  return val < 0 ? NULL : s;
}

/* The parse version functions were copied from libgcrypt.
 */
static const char *
parse_version_string (const char *s, int *major, int *minor, int *micro)
{
  s = parse_version_number (s, major);
  if (!s || *s != '.')
    return NULL;
  s++;
  s = parse_version_number (s, minor);
  if (!s)
    return NULL;
  if (*s != '.')
    {
      *micro = 0;
      return s;
    }
  s++;
  s = parse_version_number (s, micro);
  if (!s)
    return NULL;
  return s;			/* patchlevel */
}

/**
 * asn1_check_version - check for library version
 * @req_version: Required version number, or NULL.
 *
 * Check that the version of the library is at minimum the
 * requested one and return the version string; return %NULL if the
 * condition is not satisfied.  If a %NULL is passed to this function,
 * no check is done, but the version string is simply returned.
 *
 * See %ASN1_VERSION for a suitable @req_version string.
 *
 * Return value: Version string of run-time library, or %NULL if the
 *   run-time library does not meet the required version number.
 */
const char *
asn1_check_version (const char *req_version)
{
  const char *ver = ASN1_VERSION;
  int my_major, my_minor, my_micro;
  int rq_major, rq_minor, rq_micro;
  const char *my_plvl, *rq_plvl;

  if (!req_version)
    return ver;

  my_plvl = parse_version_string (ver, &my_major, &my_minor, &my_micro);
  if (!my_plvl)
    return NULL;		/* very strange our own version is bogus */
  rq_plvl = parse_version_string (req_version, &rq_major, &rq_minor,
				  &rq_micro);
  if (!rq_plvl)
    return NULL;		/* req version string is invalid */

  if (my_major > rq_major
      || (my_major == rq_major && my_minor > rq_minor)
      || (my_major == rq_major && my_minor == rq_minor
	  && my_micro > rq_micro)
      || (my_major == rq_major && my_minor == rq_minor
	  && my_micro == rq_micro && strcmp (my_plvl, rq_plvl) >= 0))
    {
      return ver;
    }
  return NULL;
}