-
Notifications
You must be signed in to change notification settings - Fork 24
/
Copy pathINTEGER.c
1359 lines (1226 loc) · 36 KB
/
INTEGER.c
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
/*
* Copyright (c) 2003-2019 Lev Walkin <[email protected]>.
* All rights reserved.
* Redistribution and modifications are permitted subject to BSD license.
*/
#include "asn1/asn1c/asn_internal.h"
#include "asn1/asn1c/INTEGER.h"
#include "asn1/asn1c/asn_codecs_prim.h" /* Encoder and decoder of a primitive type */
#include <assert.h>
#include <errno.h>
/*
* INTEGER basic type description.
*/
static const ber_tlv_tag_t asn_DEF_INTEGER_tags[] = {
(ASN_TAG_CLASS_UNIVERSAL | (2 << 2))
};
asn_TYPE_operation_t asn_OP_INTEGER = {
INTEGER_free,
INTEGER_print,
INTEGER_compare,
ber_decode_primitive,
INTEGER_encode_der,
INTEGER_decode_xer,
INTEGER_encode_xer,
#ifdef ASN_DISABLE_OER_SUPPORT
0,
0,
#else
INTEGER_decode_oer, /* OER decoder */
INTEGER_encode_oer, /* Canonical OER encoder */
#endif /* ASN_DISABLE_OER_SUPPORT */
#ifdef ASN_DISABLE_PER_SUPPORT
0,
0,
#else
INTEGER_decode_uper, /* Unaligned PER decoder */
INTEGER_encode_uper, /* Unaligned PER encoder */
#endif /* ASN_DISABLE_PER_SUPPORT */
INTEGER_random_fill,
0 /* Use generic outmost tag fetcher */
};
asn_TYPE_descriptor_t asn_DEF_INTEGER = {
"INTEGER",
"INTEGER",
&asn_OP_INTEGER,
asn_DEF_INTEGER_tags,
sizeof(asn_DEF_INTEGER_tags) / sizeof(asn_DEF_INTEGER_tags[0]),
asn_DEF_INTEGER_tags, /* Same as above */
sizeof(asn_DEF_INTEGER_tags) / sizeof(asn_DEF_INTEGER_tags[0]),
{ 0, 0, asn_generic_no_constraint },
0, 0, /* No members */
0 /* No specifics */
};
/*
* Encode INTEGER type using DER.
*/
asn_enc_rval_t
INTEGER_encode_der(const asn_TYPE_descriptor_t *td, const void *sptr,
int tag_mode, ber_tlv_tag_t tag, asn_app_consume_bytes_f *cb,
void *app_key) {
const INTEGER_t *st = (const INTEGER_t *)sptr;
asn_enc_rval_t rval;
INTEGER_t effective_integer;
ASN_DEBUG("%s %s as INTEGER (tm=%d)",
cb?"Encoding":"Estimating", td->name, tag_mode);
/*
* Canonicalize integer in the buffer.
* (Remove too long sign extension, remove some first 0x00 bytes)
*/
if(st->buf) {
uint8_t *buf = st->buf;
uint8_t *end1 = buf + st->size - 1;
int shift;
/* Compute the number of superfluous leading bytes */
for(; buf < end1; buf++) {
/*
* If the contents octets of an integer value encoding
* consist of more than one octet, then the bits of the
* first octet and bit 8 of the second octet:
* a) shall not all be ones; and
* b) shall not all be zero.
*/
switch(*buf) {
case 0x00: if((buf[1] & 0x80) == 0)
continue;
break;
case 0xff: if((buf[1] & 0x80))
continue;
break;
}
break;
}
/* Remove leading superfluous bytes from the integer */
shift = buf - st->buf;
if(shift) {
union {
const uint8_t *c_buf;
uint8_t *nc_buf;
} unconst;
unconst.c_buf = st->buf;
effective_integer.buf = unconst.nc_buf + shift;
effective_integer.size = st->size - shift;
st = &effective_integer;
}
}
rval = der_encode_primitive(td, st, tag_mode, tag, cb, app_key);
if(rval.structure_ptr == &effective_integer) {
rval.structure_ptr = sptr;
}
return rval;
}
static const asn_INTEGER_enum_map_t *INTEGER_map_enum2value(
const asn_INTEGER_specifics_t *specs, const char *lstart,
const char *lstop);
/*
* INTEGER specific human-readable output.
*/
static ssize_t
INTEGER__dump(const asn_TYPE_descriptor_t *td, const INTEGER_t *st, asn_app_consume_bytes_f *cb, void *app_key, int plainOrXER) {
const asn_INTEGER_specifics_t *specs =
(const asn_INTEGER_specifics_t *)td->specifics;
char scratch[32];
uint8_t *buf = st->buf;
uint8_t *buf_end = st->buf + st->size;
intmax_t value;
ssize_t wrote = 0;
char *p;
int ret;
if(specs && specs->field_unsigned)
ret = asn_INTEGER2umax(st, (uintmax_t *)&value);
else
ret = asn_INTEGER2imax(st, &value);
/* Simple case: the integer size is small */
if(ret == 0) {
const asn_INTEGER_enum_map_t *el;
el = (value >= 0 || !specs || !specs->field_unsigned)
? INTEGER_map_value2enum(specs, value) : 0;
if(el) {
if(plainOrXER == 0)
return asn__format_to_callback(cb, app_key,
"%" ASN_PRIdMAX " (%s)", value, el->enum_name);
else
return asn__format_to_callback(cb, app_key,
"<%s/>", el->enum_name);
} else if(plainOrXER && specs && specs->strict_enumeration) {
ASN_DEBUG("ASN.1 forbids dealing with "
"unknown value of ENUMERATED type");
errno = EPERM;
return -1;
} else {
return asn__format_to_callback(cb, app_key,
(specs && specs->field_unsigned)
? "%" ASN_PRIuMAX
: "%" ASN_PRIdMAX,
value);
}
} else if(plainOrXER && specs && specs->strict_enumeration) {
/*
* Here and earlier, we cannot encode the ENUMERATED values
* if there is no corresponding identifier.
*/
ASN_DEBUG("ASN.1 forbids dealing with "
"unknown value of ENUMERATED type");
errno = EPERM;
return -1;
}
/* Output in the long xx:yy:zz... format */
/* TODO (asn1c) replace with generic algorithm (Knuth TAOCP Vol 2, 4.3.1) */
for(p = scratch; buf < buf_end; buf++) {
const char * const h2c = "0123456789ABCDEF";
if((p - scratch) >= (ssize_t)(sizeof(scratch) - 4)) {
/* Flush buffer */
if(cb(scratch, p - scratch, app_key) < 0)
return -1;
wrote += p - scratch;
p = scratch;
}
*p++ = h2c[*buf >> 4];
*p++ = h2c[*buf & 0x0F];
*p++ = 0x3a; /* ":" */
}
if(p != scratch)
p--; /* Remove the last ":" */
wrote += p - scratch;
return (cb(scratch, p - scratch, app_key) < 0) ? -1 : wrote;
}
/*
* INTEGER specific human-readable output.
*/
int
INTEGER_print(const asn_TYPE_descriptor_t *td, const void *sptr, int ilevel,
asn_app_consume_bytes_f *cb, void *app_key) {
const INTEGER_t *st = (const INTEGER_t *)sptr;
ssize_t ret;
(void)ilevel;
if(!st || !st->buf)
ret = cb("<absent>", 8, app_key);
else
ret = INTEGER__dump(td, st, cb, app_key, 0);
return (ret < 0) ? -1 : 0;
}
struct e2v_key {
const char *start;
const char *stop;
const asn_INTEGER_enum_map_t *vemap;
const unsigned int *evmap;
};
static int
INTEGER__compar_enum2value(const void *kp, const void *am) {
const struct e2v_key *key = (const struct e2v_key *)kp;
const asn_INTEGER_enum_map_t *el = (const asn_INTEGER_enum_map_t *)am;
const char *ptr, *end, *name;
/* Remap the element (sort by different criterion) */
el = key->vemap + key->evmap[el - key->vemap];
/* Compare strings */
for(ptr = key->start, end = key->stop, name = el->enum_name;
ptr < end; ptr++, name++) {
if(*ptr != *name || !*name)
return *(const unsigned char *)ptr
- *(const unsigned char *)name;
}
return name[0] ? -1 : 0;
}
static const asn_INTEGER_enum_map_t *
INTEGER_map_enum2value(const asn_INTEGER_specifics_t *specs, const char *lstart,
const char *lstop) {
const asn_INTEGER_enum_map_t *el_found;
int count = specs ? specs->map_count : 0;
struct e2v_key key;
const char *lp;
if(!count) return NULL;
/* Guaranteed: assert(lstart < lstop); */
/* Figure out the tag name */
for(lstart++, lp = lstart; lp < lstop; lp++) {
switch(*lp) {
case 9: case 10: case 11: case 12: case 13: case 32: /* WSP */
case 0x2f: /* '/' */ case 0x3e: /* '>' */
break;
default:
continue;
}
break;
}
if(lp == lstop) return NULL; /* No tag found */
lstop = lp;
key.start = lstart;
key.stop = lstop;
key.vemap = specs->value2enum;
key.evmap = specs->enum2value;
el_found = (asn_INTEGER_enum_map_t *)bsearch(&key,
specs->value2enum, count, sizeof(specs->value2enum[0]),
INTEGER__compar_enum2value);
if(el_found) {
/* Remap enum2value into value2enum */
el_found = key.vemap + key.evmap[el_found - key.vemap];
}
return el_found;
}
static int
INTEGER__compar_value2enum(const void *kp, const void *am) {
long a = *(const long *)kp;
const asn_INTEGER_enum_map_t *el = (const asn_INTEGER_enum_map_t *)am;
long b = el->nat_value;
if(a < b) return -1;
else if(a == b) return 0;
else return 1;
}
const asn_INTEGER_enum_map_t *
INTEGER_map_value2enum(const asn_INTEGER_specifics_t *specs, long value) {
int count = specs ? specs->map_count : 0;
if(!count) return 0;
return (asn_INTEGER_enum_map_t *)bsearch(&value, specs->value2enum,
count, sizeof(specs->value2enum[0]),
INTEGER__compar_value2enum);
}
static int
INTEGER_st_prealloc(INTEGER_t *st, int min_size) {
void *p = MALLOC(min_size + 1);
if(p) {
void *b = st->buf;
st->size = 0;
st->buf = p;
FREEMEM(b);
return 0;
} else {
return -1;
}
}
/*
* Decode the chunk of XML text encoding INTEGER.
*/
static enum xer_pbd_rval
INTEGER__xer_body_decode(const asn_TYPE_descriptor_t *td, void *sptr,
const void *chunk_buf, size_t chunk_size) {
INTEGER_t *st = (INTEGER_t *)sptr;
intmax_t dec_value;
intmax_t hex_value = 0;
const char *lp;
const char *lstart = (const char *)chunk_buf;
const char *lstop = lstart + chunk_size;
enum {
ST_LEADSPACE,
ST_SKIPSPHEX,
ST_WAITDIGITS,
ST_DIGITS,
ST_DIGITS_TRAILSPACE,
ST_HEXDIGIT1,
ST_HEXDIGIT2,
ST_HEXDIGITS_TRAILSPACE,
ST_HEXCOLON,
ST_END_ENUM,
ST_UNEXPECTED
} state = ST_LEADSPACE;
const char *dec_value_start = 0; /* INVARIANT: always !0 in ST_DIGITS */
const char *dec_value_end = 0;
if(chunk_size)
ASN_DEBUG("INTEGER body %ld 0x%2x..0x%2x",
(long)chunk_size, *lstart, lstop[-1]);
if(INTEGER_st_prealloc(st, (chunk_size/3) + 1))
return XPBD_SYSTEM_FAILURE;
/*
* We may have received a tag here. It will be processed inline.
* Use strtoul()-like code and serialize the result.
*/
for(lp = lstart; lp < lstop; lp++) {
int lv = *lp;
switch(lv) {
case 0x09: case 0x0a: case 0x0d: case 0x20:
switch(state) {
case ST_LEADSPACE:
case ST_DIGITS_TRAILSPACE:
case ST_HEXDIGITS_TRAILSPACE:
case ST_SKIPSPHEX:
continue;
case ST_DIGITS:
dec_value_end = lp;
state = ST_DIGITS_TRAILSPACE;
continue;
case ST_HEXCOLON:
state = ST_HEXDIGITS_TRAILSPACE;
continue;
default:
break;
}
break;
case 0x2d: /* '-' */
if(state == ST_LEADSPACE) {
dec_value = 0;
dec_value_start = lp;
state = ST_WAITDIGITS;
continue;
}
break;
case 0x2b: /* '+' */
if(state == ST_LEADSPACE) {
dec_value = 0;
dec_value_start = lp;
state = ST_WAITDIGITS;
continue;
}
break;
case 0x30: case 0x31: case 0x32: case 0x33: case 0x34:
case 0x35: case 0x36: case 0x37: case 0x38: case 0x39:
switch(state) {
case ST_DIGITS: continue;
case ST_SKIPSPHEX: /* Fall through */
case ST_HEXDIGIT1:
hex_value = (lv - 0x30) << 4;
state = ST_HEXDIGIT2;
continue;
case ST_HEXDIGIT2:
hex_value += (lv - 0x30);
state = ST_HEXCOLON;
st->buf[st->size++] = (uint8_t)hex_value;
continue;
case ST_HEXCOLON:
return XPBD_BROKEN_ENCODING;
case ST_LEADSPACE:
dec_value = 0;
dec_value_start = lp;
/* FALL THROUGH */
case ST_WAITDIGITS:
state = ST_DIGITS;
continue;
default:
break;
}
break;
case 0x3c: /* '<', start of XML encoded enumeration */
if(state == ST_LEADSPACE) {
const asn_INTEGER_enum_map_t *el;
el = INTEGER_map_enum2value(
(const asn_INTEGER_specifics_t *)
td->specifics, lstart, lstop);
if(el) {
ASN_DEBUG("Found \"%s\" => %ld",
el->enum_name, el->nat_value);
dec_value = el->nat_value;
state = ST_END_ENUM;
lp = lstop - 1;
continue;
}
ASN_DEBUG("Unknown identifier for INTEGER");
}
return XPBD_BROKEN_ENCODING;
case 0x3a: /* ':' */
if(state == ST_HEXCOLON) {
/* This colon is expected */
state = ST_HEXDIGIT1;
continue;
} else if(state == ST_DIGITS) {
/* The colon here means that we have
* decoded the first two hexadecimal
* places as a decimal value.
* Switch decoding mode. */
ASN_DEBUG("INTEGER re-evaluate as hex form");
state = ST_SKIPSPHEX;
dec_value_start = 0;
lp = lstart - 1;
continue;
} else {
ASN_DEBUG("state %d at %ld", state, (long)(lp - lstart));
break;
}
/* [A-Fa-f] */
case 0x41:case 0x42:case 0x43:case 0x44:case 0x45:case 0x46:
case 0x61:case 0x62:case 0x63:case 0x64:case 0x65:case 0x66:
switch(state) {
case ST_SKIPSPHEX:
case ST_LEADSPACE: /* Fall through */
case ST_HEXDIGIT1:
hex_value = lv - ((lv < 0x61) ? 0x41 : 0x61);
hex_value += 10;
hex_value <<= 4;
state = ST_HEXDIGIT2;
continue;
case ST_HEXDIGIT2:
hex_value += lv - ((lv < 0x61) ? 0x41 : 0x61);
hex_value += 10;
st->buf[st->size++] = (uint8_t)hex_value;
state = ST_HEXCOLON;
continue;
case ST_DIGITS:
ASN_DEBUG("INTEGER re-evaluate as hex form");
state = ST_SKIPSPHEX;
dec_value_start = 0;
lp = lstart - 1;
continue;
default:
break;
}
break;
}
/* Found extra non-numeric stuff */
ASN_DEBUG("INTEGER :: Found non-numeric 0x%2x at %ld",
lv, (long)(lp - lstart));
state = ST_UNEXPECTED;
break;
}
switch(state) {
case ST_END_ENUM:
/* Got a complete and valid enumeration encoded as a tag. */
break;
case ST_DIGITS:
dec_value_end = lstop;
/* FALL THROUGH */
case ST_DIGITS_TRAILSPACE:
/* The last symbol encountered was a digit. */
switch(asn_strtoimax_lim(dec_value_start, &dec_value_end, &dec_value)) {
case ASN_STRTOX_OK:
if(dec_value >= LONG_MIN && dec_value <= LONG_MAX) {
break;
} else {
/*
* We model INTEGER on long for XER,
* to avoid rewriting all the tests at once.
*/
ASN_DEBUG("INTEGER exceeds long range");
}
/* Fall through */
case ASN_STRTOX_ERROR_RANGE:
ASN_DEBUG("INTEGER decode %s hit range limit", td->name);
return XPBD_DECODER_LIMIT;
case ASN_STRTOX_ERROR_INVAL:
case ASN_STRTOX_EXPECT_MORE:
case ASN_STRTOX_EXTRA_DATA:
return XPBD_BROKEN_ENCODING;
}
break;
case ST_HEXCOLON:
case ST_HEXDIGITS_TRAILSPACE:
st->buf[st->size] = 0; /* Just in case termination */
return XPBD_BODY_CONSUMED;
case ST_HEXDIGIT1:
case ST_HEXDIGIT2:
case ST_SKIPSPHEX:
return XPBD_BROKEN_ENCODING;
case ST_LEADSPACE:
/* Content not found */
return XPBD_NOT_BODY_IGNORE;
case ST_WAITDIGITS:
case ST_UNEXPECTED:
ASN_DEBUG("INTEGER: No useful digits (state %d)", state);
return XPBD_BROKEN_ENCODING; /* No digits */
}
/*
* Convert the result of parsing of enumeration or a straight
* decimal value into a BER representation.
*/
if(asn_imax2INTEGER(st, dec_value)) {
ASN_DEBUG("INTEGER decode %s conversion failed", td->name);
return XPBD_SYSTEM_FAILURE;
}
return XPBD_BODY_CONSUMED;
}
asn_dec_rval_t
INTEGER_decode_xer(const asn_codec_ctx_t *opt_codec_ctx,
const asn_TYPE_descriptor_t *td, void **sptr,
const char *opt_mname, const void *buf_ptr, size_t size) {
return xer_decode_primitive(opt_codec_ctx, td,
sptr, sizeof(INTEGER_t), opt_mname,
buf_ptr, size, INTEGER__xer_body_decode);
}
asn_enc_rval_t
INTEGER_encode_xer(const asn_TYPE_descriptor_t *td, const void *sptr,
int ilevel, enum xer_encoder_flags_e flags,
asn_app_consume_bytes_f *cb, void *app_key) {
const INTEGER_t *st = (const INTEGER_t *)sptr;
asn_enc_rval_t er;
(void)ilevel;
(void)flags;
if(!st || !st->buf)
ASN__ENCODE_FAILED;
er.encoded = INTEGER__dump(td, st, cb, app_key, 1);
if(er.encoded < 0) ASN__ENCODE_FAILED;
ASN__ENCODED_OK(er);
}
#ifndef ASN_DISABLE_PER_SUPPORT
asn_dec_rval_t
INTEGER_decode_uper(const asn_codec_ctx_t *opt_codec_ctx,
const asn_TYPE_descriptor_t *td,
const asn_per_constraints_t *constraints, void **sptr,
asn_per_data_t *pd) {
const asn_INTEGER_specifics_t *specs =
(const asn_INTEGER_specifics_t *)td->specifics;
asn_dec_rval_t rval = { RC_OK, 0 };
INTEGER_t *st = (INTEGER_t *)*sptr;
const asn_per_constraint_t *ct;
int repeat;
(void)opt_codec_ctx;
if(!st) {
st = (INTEGER_t *)(*sptr = CALLOC(1, sizeof(*st)));
if(!st) ASN__DECODE_FAILED;
}
if(!constraints) constraints = td->encoding_constraints.per_constraints;
ct = constraints ? &constraints->value : 0;
if(ct && ct->flags & APC_EXTENSIBLE) {
int inext = per_get_few_bits(pd, 1);
if(inext < 0) ASN__DECODE_STARVED;
if(inext) ct = 0;
}
FREEMEM(st->buf);
st->buf = 0;
st->size = 0;
if(ct) {
if(ct->flags & APC_SEMI_CONSTRAINED) {
st->buf = (uint8_t *)CALLOC(1, 2);
if(!st->buf) ASN__DECODE_FAILED;
st->size = 1;
} else if(ct->flags & APC_CONSTRAINED && ct->range_bits >= 0) {
size_t size = (ct->range_bits + 7) >> 3;
st->buf = (uint8_t *)MALLOC(1 + size + 1);
if(!st->buf) ASN__DECODE_FAILED;
st->size = size;
}
}
/* X.691-2008/11, #13.2.2, constrained whole number */
if(ct && ct->flags != APC_UNCONSTRAINED) {
/* #11.5.6 */
ASN_DEBUG("Integer with range %d bits", ct->range_bits);
if(ct->range_bits >= 0) {
if((size_t)ct->range_bits > 8 * sizeof(unsigned long))
ASN__DECODE_FAILED;
if(specs && specs->field_unsigned) {
unsigned long uvalue = 0;
if(uper_get_constrained_whole_number(pd,
&uvalue, ct->range_bits))
ASN__DECODE_STARVED;
ASN_DEBUG("Got value %lu + low %ld",
uvalue, ct->lower_bound);
uvalue += ct->lower_bound;
if(asn_ulong2INTEGER(st, uvalue))
ASN__DECODE_FAILED;
} else {
unsigned long uvalue = 0;
long svalue;
if(uper_get_constrained_whole_number(pd,
&uvalue, ct->range_bits))
ASN__DECODE_STARVED;
ASN_DEBUG("Got value %lu + low %ld",
uvalue, ct->lower_bound);
if(per_long_range_unrebase(uvalue, ct->lower_bound,
ct->upper_bound, &svalue)
|| asn_long2INTEGER(st, svalue)) {
ASN__DECODE_FAILED;
}
}
return rval;
}
} else {
ASN_DEBUG("Decoding unconstrained integer %s", td->name);
}
/* X.691, #12.2.3, #12.2.4 */
do {
ssize_t len = 0;
void *p = NULL;
int ret = 0;
/* Get the PER length */
len = uper_get_length(pd, -1, 0, &repeat);
if(len < 0) ASN__DECODE_STARVED;
p = REALLOC(st->buf, st->size + len + 1);
if(!p) ASN__DECODE_FAILED;
st->buf = (uint8_t *)p;
ret = per_get_many_bits(pd, &st->buf[st->size], 0, 8 * len);
if(ret < 0) ASN__DECODE_STARVED;
st->size += len;
} while(repeat);
st->buf[st->size] = 0; /* JIC */
/* #12.2.3 */
if(ct && ct->lower_bound) {
/*
* TODO (asn1c) replace by in-place arithmetics.
*/
long value = 0;
if(asn_INTEGER2long(st, &value))
ASN__DECODE_FAILED;
if(asn_imax2INTEGER(st, value + ct->lower_bound))
ASN__DECODE_FAILED;
}
return rval;
}
asn_enc_rval_t
INTEGER_encode_uper(const asn_TYPE_descriptor_t *td,
const asn_per_constraints_t *constraints, const void *sptr,
asn_per_outp_t *po) {
const asn_INTEGER_specifics_t *specs =
(const asn_INTEGER_specifics_t *)td->specifics;
asn_enc_rval_t er;
const INTEGER_t *st = (const INTEGER_t *)sptr;
const uint8_t *buf;
const uint8_t *end;
const asn_per_constraint_t *ct;
long value = 0;
if(!st || st->size == 0) ASN__ENCODE_FAILED;
if(!constraints) constraints = td->encoding_constraints.per_constraints;
ct = constraints ? &constraints->value : 0;
er.encoded = 0;
if(ct) {
int inext = 0;
if(specs && specs->field_unsigned) {
unsigned long uval;
if(asn_INTEGER2ulong(st, &uval))
ASN__ENCODE_FAILED;
/* Check proper range */
if(ct->flags & APC_SEMI_CONSTRAINED) {
if(uval < (unsigned long)ct->lower_bound)
inext = 1;
} else if(ct->range_bits >= 0) {
if(uval < (unsigned long)ct->lower_bound
|| uval > (unsigned long)ct->upper_bound)
inext = 1;
}
ASN_DEBUG("Value %lu (%02x/%" ASN_PRI_SIZE ") lb %lu ub %lu %s",
uval, st->buf[0], st->size,
ct->lower_bound, ct->upper_bound,
inext ? "ext" : "fix");
value = uval;
} else {
if(asn_INTEGER2long(st, &value))
ASN__ENCODE_FAILED;
/* Check proper range */
if(ct->flags & APC_SEMI_CONSTRAINED) {
if(value < ct->lower_bound)
inext = 1;
} else if(ct->range_bits >= 0) {
if(value < ct->lower_bound
|| value > ct->upper_bound)
inext = 1;
}
ASN_DEBUG("Value %ld (%02x/%" ASN_PRI_SIZE ") lb %ld ub %ld %s",
value, st->buf[0], st->size,
ct->lower_bound, ct->upper_bound,
inext ? "ext" : "fix");
}
if(ct->flags & APC_EXTENSIBLE) {
if(per_put_few_bits(po, inext, 1))
ASN__ENCODE_FAILED;
if(inext) ct = 0;
} else if(inext) {
ASN__ENCODE_FAILED;
}
}
/* X.691-11/2008, #13.2.2, test if constrained whole number */
if(ct && ct->range_bits >= 0) {
unsigned long v;
/* #11.5.6 -> #11.3 */
ASN_DEBUG("Encoding integer %ld (%lu) with range %d bits",
value, value - ct->lower_bound, ct->range_bits);
if(per_long_range_rebase(value, ct->lower_bound, ct->upper_bound, &v)) {
ASN__ENCODE_FAILED;
}
if(uper_put_constrained_whole_number_u(po, v, ct->range_bits))
ASN__ENCODE_FAILED;
ASN__ENCODED_OK(er);
}
if(ct && ct->lower_bound) {
ASN_DEBUG("Adjust lower bound to %ld", ct->lower_bound);
/* TODO (asn1c) adjust lower bound */
ASN__ENCODE_FAILED;
}
for(buf = st->buf, end = st->buf + st->size; buf < end;) {
int need_eom = 0;
ssize_t mayEncode = uper_put_length(po, end - buf, &need_eom);
if(mayEncode < 0)
ASN__ENCODE_FAILED;
if(per_put_many_bits(po, buf, 8 * mayEncode))
ASN__ENCODE_FAILED;
buf += mayEncode;
if(need_eom && uper_put_length(po, 0, 0)) ASN__ENCODE_FAILED;
}
ASN__ENCODED_OK(er);
}
#endif /* ASN_DISABLE_PER_SUPPORT */
static intmax_t
asn__integer_convert(const uint8_t *b, const uint8_t *end) {
uintmax_t value;
/* Perform the sign initialization */
/* Actually value = -(*b >> 7); gains nothing, yet unreadable! */
if((*b >> 7)) {
value = (uintmax_t)(-1);
} else {
value = 0;
}
/* Conversion engine */
for(; b < end; b++) {
value = (value << 8) | *b;
}
return value;
}
int
asn_INTEGER2imax(const INTEGER_t *iptr, intmax_t *lptr) {
uint8_t *b, *end;
size_t size;
/* Sanity checking */
if(!iptr || !iptr->buf || !lptr) {
errno = EINVAL;
return -1;
}
/* Cache the begin/end of the buffer */
b = iptr->buf; /* Start of the INTEGER buffer */
size = iptr->size;
end = b + size; /* Where to stop */
if(size > sizeof(intmax_t)) {
uint8_t *end1 = end - 1;
/*
* Slightly more advanced processing,
* able to process INTEGERs with >sizeof(intmax_t) bytes
* when the actual value is small, e.g. for intmax_t == int32_t
* (0x0000000000abcdef INTEGER would yield a fine 0x00abcdef int32_t)
*/
/* Skip out the insignificant leading bytes */
for(; b < end1; b++) {
switch(*b) {
case 0x00: if((b[1] & 0x80) == 0) continue; break;
case 0xff: if((b[1] & 0x80) != 0) continue; break;
}
break;
}
size = end - b;
if(size > sizeof(intmax_t)) {
/* Still cannot fit the sizeof(intmax_t) */
errno = ERANGE;
return -1;
}
}
/* Shortcut processing of a corner case */
if(end == b) {
*lptr = 0;
return 0;
}
*lptr = asn__integer_convert(b, end);
return 0;
}
/* TODO (asn1c) negative INTEGER values are silently interpreted as large unsigned ones. */
int
asn_INTEGER2umax(const INTEGER_t *iptr, uintmax_t *lptr) {
uint8_t *b, *end;
uintmax_t value;
size_t size;
if(!iptr || !iptr->buf || !lptr) {
errno = EINVAL;
return -1;
}
b = iptr->buf;
size = iptr->size;
end = b + size;
/* If all extra leading bytes are zeroes, ignore them */
for(; size > sizeof(value); b++, size--) {
if(*b) {
/* Value won't fit into uintmax_t */
errno = ERANGE;
return -1;
}
}
/* Conversion engine */
for(value = 0; b < end; b++)
value = (value << 8) | *b;
*lptr = value;
return 0;
}
int
asn_umax2INTEGER(INTEGER_t *st, uintmax_t value) {
uint8_t *buf;
uint8_t *end;
uint8_t *b;
int shr;
if(value <= ((~(uintmax_t)0) >> 1)) {
return asn_imax2INTEGER(st, value);
}
buf = (uint8_t *)MALLOC(1 + sizeof(value));
if(!buf) return -1;
end = buf + (sizeof(value) + 1);
buf[0] = 0; /* INTEGERs are signed. 0-byte indicates positive. */
for(b = buf + 1, shr = (sizeof(value) - 1) * 8; b < end; shr -= 8, b++)
*b = (uint8_t)(value >> shr);
if(st->buf) FREEMEM(st->buf);
st->buf = buf;
st->size = 1 + sizeof(value);
return 0;
}
int
asn_imax2INTEGER(INTEGER_t *st, intmax_t value) {
uint8_t *buf, *bp;
uint8_t *p;
uint8_t *pstart;
uint8_t *pend1;
int littleEndian = 1; /* Run-time detection */
int add;
if(!st) {
errno = EINVAL;
return -1;
}
buf = (uint8_t *)(long *)MALLOC(sizeof(value));
if(!buf) return -1;
if(*(char *)&littleEndian) {
pstart = (uint8_t *)&value + sizeof(value) - 1;
pend1 = (uint8_t *)&value;
add = -1;
} else {
pstart = (uint8_t *)&value;
pend1 = pstart + sizeof(value) - 1;
add = 1;
}
/*
* If the contents octet consists of more than one octet,
* then bits of the first octet and bit 8 of the second octet:
* a) shall not all be ones; and
* b) shall not all be zero.
*/
for(p = pstart; p != pend1; p += add) {
switch(*p) {
case 0x00: if((*(p+add) & 0x80) == 0)
continue;
break;
case 0xff: if((*(p+add) & 0x80))
continue;
break;
}
break;
}
/* Copy the integer body */
if(*(char *)&littleEndian) {
for(bp = buf; p >= pend1; p--)
*bp++ = *p;
} else {
for(bp = buf; p <= pend1; p++)
*bp++ = *p;
}
if(st->buf) FREEMEM(st->buf);
st->buf = buf;
st->size = bp - buf;
return 0;
}
int
asn_INTEGER2long(const INTEGER_t *iptr, long *l) {
intmax_t v;
if(asn_INTEGER2imax(iptr, &v) == 0) {
if(v < LONG_MIN || v > LONG_MAX) {
errno = ERANGE;
return -1;
}