2
* Copyright (c) 2003, 2004, 2005 Lev Walkin <vlm@lionet.info>.
4
* Redistribution and modifications are permitted subject to BSD license.
6
#include <asn_internal.h>
7
#include <OCTET_STRING.h>
8
#include <BIT_STRING.h> /* for .bits_unused member */
12
* OCTET STRING basic type description.
14
static ber_tlv_tag_t asn_DEF_OCTET_STRING_tags[] = {
15
(ASN_TAG_CLASS_UNIVERSAL | (4 << 2))
17
static asn_OCTET_STRING_specifics_t asn_DEF_OCTET_STRING_specs = {
18
sizeof(OCTET_STRING_t),
19
offsetof(OCTET_STRING_t, _asn_ctx),
22
asn_TYPE_descriptor_t asn_DEF_OCTET_STRING = {
23
"OCTET STRING", /* Canonical name */
24
"OCTET_STRING", /* XML tag name */
26
OCTET_STRING_print, /* non-ascii stuff, generally */
27
asn_generic_no_constraint,
28
OCTET_STRING_decode_ber,
29
OCTET_STRING_encode_der,
30
OCTET_STRING_decode_xer_hex,
31
OCTET_STRING_encode_xer,
32
0, /* Use generic outmost tag fetcher */
33
asn_DEF_OCTET_STRING_tags,
34
sizeof(asn_DEF_OCTET_STRING_tags)
35
/ sizeof(asn_DEF_OCTET_STRING_tags[0]),
36
asn_DEF_OCTET_STRING_tags, /* Same as above */
37
sizeof(asn_DEF_OCTET_STRING_tags)
38
/ sizeof(asn_DEF_OCTET_STRING_tags[0]),
39
0, 0, /* No members */
40
&asn_DEF_OCTET_STRING_specs
46
#define _CH_PHASE(ctx, inc) do { \
51
#define NEXT_PHASE(ctx) _CH_PHASE(ctx, +1)
52
#define PREV_PHASE(ctx) _CH_PHASE(ctx, -1)
55
#define ADVANCE(num_bytes) do { \
56
size_t num = (num_bytes); \
57
buf_ptr = ((const char *)buf_ptr) + num; \
59
consumed_myself += num; \
63
#define RETURN(_code) do { \
65
rval.consumed = consumed_myself; \
70
#define APPEND(bufptr, bufsize) do { \
71
size_t _bs = (bufsize); /* Append size */ \
72
size_t _ns = ctx->context; /* Allocated now */ \
73
size_t _es = st->size + _bs; /* Expected size */ \
74
/* int is really a typeof(st->size): */ \
75
if((int)_es < 0) RETURN(RC_FAIL); \
78
/* Be nice and round to the memory allocator */ \
79
do { _ns = _ns ? _ns << 1 : 16; } \
81
/* int is really a typeof(st->size): */ \
82
if((int)_ns < 0) RETURN(RC_FAIL); \
83
ptr = REALLOC(st->buf, _ns); \
85
st->buf = (uint8_t *)ptr; \
90
ASN_DEBUG("Reallocating into %ld", _ns); \
92
memcpy(st->buf + st->size, bufptr, _bs); \
93
/* Convenient nul-termination */ \
94
st->buf[_es] = '\0'; \
99
* Internal variant of the OCTET STRING.
101
typedef enum OS_type {
102
_TT_GENERIC = 0, /* Just a random OCTET STRING */
103
_TT_BIT_STRING = 1, /* BIT STRING type, a special case */
104
_TT_ANY = 2, /* ANY type, a special case too */
108
* The main reason why ASN.1 is still alive is that too much time and effort
109
* is necessary for learning it more or less adequately, thus creating a gut
110
* necessity to demonstrate that aquired skill everywhere afterwards.
111
* No, I am not going to explain what the following stuff is.
114
ber_tlv_len_t left; /* What's left to read (or -1) */
115
ber_tlv_len_t got; /* What was actually processed */
116
int cont_level; /* Depth of subcontainment */
117
int want_nulls; /* Want null "end of content" octets? */
118
int bits_chopped; /* Flag in BIT STRING mode */
119
ber_tlv_tag_t tag; /* For debugging purposes */
120
struct _stack_el *prev;
121
struct _stack_el *next;
124
struct _stack_el *tail;
125
struct _stack_el *cur_ptr;
128
static struct _stack_el *
129
OS__add_stack_el(struct _stack *st) {
130
struct _stack_el *nel;
133
* Reuse the old stack frame or allocate a new one.
135
if(st->cur_ptr && st->cur_ptr->next) {
136
nel = st->cur_ptr->next;
137
nel->bits_chopped = 0;
139
/* Retain the nel->cont_level, it's correct. */
141
nel = (struct _stack_el *)CALLOC(1, sizeof(struct _stack_el));
146
/* Increase a subcontainment depth */
147
nel->cont_level = st->tail->cont_level + 1;
148
st->tail->next = nel;
150
nel->prev = st->tail;
159
static struct _stack *
161
return (struct _stack *)CALLOC(1, sizeof(struct _stack));
165
* Decode OCTET STRING type.
168
OCTET_STRING_decode_ber(asn_codec_ctx_t *opt_codec_ctx,
169
asn_TYPE_descriptor_t *td,
170
void **os_structure, const void *buf_ptr, size_t size, int tag_mode) {
171
asn_OCTET_STRING_specifics_t *specs = td->specifics
172
? (asn_OCTET_STRING_specifics_t *)td->specifics
173
: &asn_DEF_OCTET_STRING_specs;
174
BIT_STRING_t *st = (BIT_STRING_t *)*os_structure;
176
asn_struct_ctx_t *ctx;
177
ssize_t consumed_myself = 0;
178
struct _stack *stck; /* Expectations stack structure */
179
struct _stack_el *sel = 0; /* Stack element */
181
OS_type_e type_variant = (OS_type_e)specs->subvariant;
183
ASN_DEBUG("Decoding %s as %s (frame %ld)",
185
(type_variant == _TT_GENERIC) ?
186
"OCTET STRING" : "OS-SpecialCase",
190
* Create the string if does not exist.
193
*os_structure = CALLOC(1, specs->struct_size);
194
st = (BIT_STRING_t *)*os_structure;
199
/* Restore parsing context */
200
ctx = (asn_struct_ctx_t *)((char *)st + specs->ctx_offset);
207
rval = ber_check_tags(opt_codec_ctx, td, ctx,
208
buf_ptr, size, tag_mode, -1,
209
&ctx->left, &tlv_constr);
210
if(rval.code != RC_OK)
215
* Complex operation, requires stack of expectations.
217
ctx->ptr = _new_stack();
219
stck = (struct _stack *)ctx->ptr;
225
* Jump into stackless primitive decoding.
228
if(type_variant == _TT_ANY && tag_mode != 1)
229
APPEND(buf_ptr, rval.consumed);
230
ADVANCE(rval.consumed);
239
* Fill the stack with expectations.
241
stck = (struct _stack *)ctx->ptr;
244
ber_tlv_tag_t tlv_tag;
245
ber_tlv_len_t tlv_len;
246
ber_tlv_tag_t expected_tag;
247
ssize_t tl, ll, tlvl;
248
/* This one works even if (sel->left == -1) */
249
ssize_t Left = ((!sel||(size_t)sel->left >= size)
250
?(ssize_t)size:sel->left);
253
ASN_DEBUG("%p, s->l=%ld, s->wn=%ld, s->g=%ld\n", sel,
254
(long)(sel?sel->left:0),
255
(long)(sel?sel->want_nulls:0),
256
(long)(sel?sel->got:0)
258
if(sel && sel->left <= 0 && sel->want_nulls == 0) {
260
struct _stack_el *prev = sel->prev;
261
if(prev->left != -1) {
262
if(prev->left < sel->got)
264
prev->left -= sel->got;
266
prev->got += sel->got;
267
sel = stck->cur_ptr = prev;
272
sel = stck->cur_ptr = 0;
273
break; /* Nothing to wait */
277
tl = ber_fetch_tag(buf_ptr, Left, &tlv_tag);
278
ASN_DEBUG("fetch tag(size=%ld,L=%ld), %sstack, left=%ld, wn=%ld, tl=%ld",
279
(long)size, (long)Left, sel?"":"!",
280
(long)(sel?sel->left:0),
281
(long)(sel?sel->want_nulls:0),
284
case -1: RETURN(RC_FAIL);
285
case 0: RETURN(RC_WMORE);
288
tlv_constr = BER_TLV_CONSTRUCTED(buf_ptr);
290
ll = ber_fetch_length(tlv_constr,
291
(const char *)buf_ptr + tl,Left - tl,&tlv_len);
292
ASN_DEBUG("Got tag=%s, tc=%d, left=%ld, tl=%ld, len=%ld, ll=%ld",
293
ber_tlv_tag_string(tlv_tag), tlv_constr,
294
(long)Left, (long)tl, (long)tlv_len, (long)ll);
296
case -1: RETURN(RC_FAIL);
297
case 0: RETURN(RC_WMORE);
300
if(sel && sel->want_nulls
301
&& ((const uint8_t *)buf_ptr)[0] == 0
302
&& ((const uint8_t *)buf_ptr)[1] == 0)
305
ASN_DEBUG("Eat EOC; wn=%d--", sel->want_nulls);
307
if(type_variant == _TT_ANY
308
&& (tag_mode != 1 || sel->cont_level))
313
if(sel->left != -1) {
314
sel->left -= 2; /* assert(sel->left >= 2) */
318
if(sel->want_nulls == 0) {
319
/* Move to the next expectation */
328
* Set up expected tags,
329
* depending on ASN.1 type being decoded.
331
switch(type_variant) {
333
/* X.690: 8.6.4.1, NOTE 2 */
338
int level = sel->cont_level;
339
if(level < td->all_tags_count) {
340
expected_tag = td->all_tags[level];
342
} else if(td->all_tags_count) {
343
expected_tag = td->all_tags
344
[td->all_tags_count - 1];
347
/* else, Fall through */
351
expected_tag = tlv_tag;
356
if(tlv_tag != expected_tag) {
358
ber_tlv_tag_snprint(tlv_tag,
359
buf[0], sizeof(buf[0]));
360
ber_tlv_tag_snprint(td->tags[td->tags_count-1],
361
buf[1], sizeof(buf[1]));
362
ASN_DEBUG("Tag does not match expectation: %s != %s",
367
tlvl = tl + ll; /* Combined length of T and L encoding */
368
if((tlv_len + tlvl) < 0) {
369
/* tlv_len value is too big */
370
ASN_DEBUG("TLV encoding + length (%ld) is too big",
376
* Append a new expectation.
378
sel = OS__add_stack_el(stck);
379
if(!sel) RETURN(RC_FAIL);
383
sel->want_nulls = (tlv_len==-1);
384
if(sel->prev && sel->prev->left != -1) {
385
/* Check that the parent frame is big enough */
386
if(sel->prev->left < tlvl + (tlv_len==-1?0:tlv_len))
389
sel->left = sel->prev->left - tlvl;
395
if(type_variant == _TT_ANY
396
&& (tag_mode != 1 || sel->cont_level))
397
APPEND(buf_ptr, tlvl);
401
ASN_DEBUG("+EXPECT2 got=%ld left=%ld, wn=%d, clvl=%d",
402
(long)sel->got, (long)sel->left,
403
sel->want_nulls, sel->cont_level);
407
/* Finished operation, "phase out" */
408
ASN_DEBUG("Phase out");
416
stck = (struct _stack *)ctx->ptr;
418
ASN_DEBUG("Phase 2: Need %ld bytes, size=%ld, alrg=%ld, wn=%d",
419
(long)sel->left, (long)size, (long)sel->got,
424
assert(sel->left >= 0);
426
len = ((ber_tlv_len_t)size < sel->left)
427
? (ber_tlv_len_t)size : sel->left;
429
if(type_variant == _TT_BIT_STRING
430
&& sel->bits_chopped == 0) {
431
/* Put the unused-bits-octet away */
432
st->bits_unused = *(const uint8_t *)buf_ptr;
433
APPEND(((const char *)buf_ptr+1), (len - 1));
434
sel->bits_chopped = 1;
436
APPEND(buf_ptr, len);
444
ASN_DEBUG("OS left %ld, size = %ld, wn=%d\n",
445
(long)sel->left, (long)size, sel->want_nulls);
456
* Primitive form, no stack required.
458
assert(ctx->left >= 0);
460
if(size < (size_t)ctx->left) {
461
if(!size) RETURN(RC_WMORE);
462
if(type_variant == _TT_BIT_STRING && !ctx->context) {
463
st->bits_unused = *(const uint8_t *)buf_ptr;
467
APPEND(buf_ptr, size);
468
assert(ctx->context > 0);
473
if(type_variant == _TT_BIT_STRING
474
&& !ctx->context && ctx->left) {
475
st->bits_unused = *(const uint8_t *)buf_ptr;
479
APPEND(buf_ptr, ctx->left);
489
ASN_DEBUG("3sel p=%p, wn=%d, l=%ld, g=%ld, size=%ld",
490
sel->prev, sel->want_nulls,
491
(long)sel->left, (long)sel->got, (long)size);
492
if(sel->prev || sel->want_nulls > 1 || sel->left > 0) {
498
* BIT STRING-specific processing.
500
if(type_variant == _TT_BIT_STRING && st->size) {
501
/* Finalize BIT STRING: zero out unused bits. */
502
st->buf[st->size-1] &= 0xff << st->bits_unused;
505
ASN_DEBUG("Took %ld bytes to encode %s: [%s]:%ld",
506
(long)consumed_myself, td->name,
507
(type_variant == _TT_GENERIC) ? (char *)st->buf : "<data>",
515
* Encode OCTET STRING type using DER.
518
OCTET_STRING_encode_der(asn_TYPE_descriptor_t *td, void *sptr,
519
int tag_mode, ber_tlv_tag_t tag,
520
asn_app_consume_bytes_f *cb, void *app_key) {
522
asn_OCTET_STRING_specifics_t *specs = td->specifics
523
? (asn_OCTET_STRING_specifics_t *)td->specifics
524
: &asn_DEF_OCTET_STRING_specs;
525
BIT_STRING_t *st = (BIT_STRING_t *)sptr;
526
OS_type_e type_variant = (OS_type_e)specs->subvariant;
527
int fix_last_byte = 0;
529
ASN_DEBUG("%s %s as OCTET STRING",
530
cb?"Estimating":"Encoding", td->name);
535
if(type_variant != _TT_ANY || tag_mode == 1) {
536
er.encoded = der_write_tags(td,
537
(type_variant == _TT_BIT_STRING) + st->size,
538
tag_mode, type_variant == _TT_ANY, tag, cb, app_key);
539
if(er.encoded == -1) {
541
er.structure_ptr = sptr;
545
/* Disallow: [<tag>] IMPLICIT ANY */
546
assert(type_variant != _TT_ANY || tag_mode != -1);
551
er.encoded += (type_variant == _TT_BIT_STRING) + st->size;
556
* Prepare to deal with the last octet of BIT STRING.
558
if(type_variant == _TT_BIT_STRING) {
559
uint8_t b = st->bits_unused & 0x07;
560
if(b && st->size) fix_last_byte = 1;
561
_ASN_CALLBACK(&b, 1);
565
/* Invoke callback for the main part of the buffer */
566
_ASN_CALLBACK(st->buf, st->size - fix_last_byte);
568
/* The last octet should be stripped off the unused bits */
570
uint8_t b = st->buf[st->size-1] & (0xff << st->bits_unused);
571
_ASN_CALLBACK(&b, 1);
574
er.encoded += st->size;
581
OCTET_STRING_encode_xer(asn_TYPE_descriptor_t *td, void *sptr,
582
int ilevel, enum xer_encoder_flags_e flags,
583
asn_app_consume_bytes_f *cb, void *app_key) {
584
static const char *h2c = "0123456789ABCDEF";
585
const OCTET_STRING_t *st = (const OCTET_STRING_t *)sptr;
587
char scratch[16 * 3 + 4];
599
* Dump the contents of the buffer in hexadecimal.
602
end = buf + st->size;
603
if(flags & XER_F_CANONICAL) {
604
char *scend = scratch + (sizeof(scratch) - 2);
605
for(; buf < end; buf++) {
607
_ASN_CALLBACK(scratch, p - scratch);
608
er.encoded += p - scratch;
611
*p++ = h2c[(*buf >> 4) & 0x0F];
612
*p++ = h2c[*buf & 0x0F];
615
_ASN_CALLBACK(scratch, p-scratch); /* Dump the rest */
616
er.encoded += p - scratch;
618
for(i = 0; buf < end; buf++, i++) {
619
if(!(i % 16) && (i || st->size > 16)) {
620
_ASN_CALLBACK(scratch, p-scratch);
621
er.encoded += (p-scratch);
623
_i_ASN_TEXT_INDENT(1, ilevel);
625
*p++ = h2c[(*buf >> 4) & 0x0F];
626
*p++ = h2c[*buf & 0x0F];
630
p--; /* Remove the tail space */
631
_ASN_CALLBACK(scratch, p-scratch); /* Dump the rest */
632
er.encoded += p - scratch;
634
_i_ASN_TEXT_INDENT(1, ilevel-1);
643
static struct OCTET_STRING__xer_escape_table_s {
646
} OCTET_STRING__xer_escape_table[] = {
647
#define OSXET(s) { s, sizeof(s) - 1 }
648
OSXET("\074\156\165\154\057\076"), /* <nul/> */
649
OSXET("\074\163\157\150\057\076"), /* <soh/> */
650
OSXET("\074\163\164\170\057\076"), /* <stx/> */
651
OSXET("\074\145\164\170\057\076"), /* <etx/> */
652
OSXET("\074\145\157\164\057\076"), /* <eot/> */
653
OSXET("\074\145\156\161\057\076"), /* <enq/> */
654
OSXET("\074\141\143\153\057\076"), /* <ack/> */
655
OSXET("\074\142\145\154\057\076"), /* <bel/> */
656
OSXET("\074\142\163\057\076"), /* <bs/> */
657
OSXET("\011"), /* \t */
658
OSXET("\012"), /* \n */
659
OSXET("\074\166\164\057\076"), /* <vt/> */
660
OSXET("\074\146\146\057\076"), /* <ff/> */
661
OSXET("\015"), /* \r */
662
OSXET("\074\163\157\057\076"), /* <so/> */
663
OSXET("\074\163\151\057\076"), /* <si/> */
664
OSXET("\074\144\154\145\057\076"), /* <dle/> */
665
OSXET("\074\144\143\061\057\076"), /* <de1/> */
666
OSXET("\074\144\143\062\057\076"), /* <de2/> */
667
OSXET("\074\144\143\063\057\076"), /* <de3/> */
668
OSXET("\074\144\143\064\057\076"), /* <de4/> */
669
OSXET("\074\156\141\153\057\076"), /* <nak/> */
670
OSXET("\074\163\171\156\057\076"), /* <syn/> */
671
OSXET("\074\145\164\142\057\076"), /* <etb/> */
672
OSXET("\074\143\141\156\057\076"), /* <can/> */
673
OSXET("\074\145\155\057\076"), /* <em/> */
674
OSXET("\074\163\165\142\057\076"), /* <sub/> */
675
OSXET("\074\145\163\143\057\076"), /* <esc/> */
676
OSXET("\074\151\163\064\057\076"), /* <is4/> */
677
OSXET("\074\151\163\063\057\076"), /* <is3/> */
678
OSXET("\074\151\163\062\057\076"), /* <is2/> */
679
OSXET("\074\151\163\061\057\076"), /* <is1/> */
686
OSXET("\046\141\155\160\073"), /* & */
688
{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, /* ()*+,-./ */
689
{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, /* 01234567 */
690
{0,0},{0,0},{0,0},{0,0}, /* 89:; */
691
OSXET("\046\154\164\073"), /* < */
693
OSXET("\046\147\164\073"), /* > */
697
OS__check_escaped_control_char(const void *buf, int size) {
700
* Inefficient algorithm which translates the escape sequences
701
* defined above into characters. Returns -1 if not found.
702
* TODO: replace by a faster algorithm (bsearch(), hash or
703
* nested table lookups).
705
for(i = 0; i < 32 /* Don't spend time on the bottom half */; i++) {
706
struct OCTET_STRING__xer_escape_table_s *el;
707
el = &OCTET_STRING__xer_escape_table[i];
708
if(el->size == size && memcmp(buf, el->string, size) == 0)
715
OCTET_STRING__handle_control_chars(void *struct_ptr, const void *chunk_buf, size_t chunk_size) {
717
* This might be one of the escape sequences
718
* for control characters. Check it out.
721
int control_char = OS__check_escaped_control_char(chunk_buf,chunk_size);
722
if(control_char >= 0) {
723
OCTET_STRING_t *st = (OCTET_STRING_t *)struct_ptr;
724
void *p = REALLOC(st->buf, st->size + 2);
726
st->buf = (uint8_t *)p;
727
st->buf[st->size++] = control_char;
728
st->buf[st->size] = '\0'; /* nul-termination */
733
return -1; /* No, it's not */
737
OCTET_STRING_encode_xer_utf8(asn_TYPE_descriptor_t *td, void *sptr,
738
int ilevel, enum xer_encoder_flags_e flags,
739
asn_app_consume_bytes_f *cb, void *app_key) {
740
const OCTET_STRING_t *st = (const OCTET_STRING_t *)sptr;
743
uint8_t *ss; /* Sequence start */
744
ssize_t encoded_len = 0;
746
(void)ilevel; /* Unused argument */
747
(void)flags; /* Unused argument */
753
end = buf + st->size;
754
for(ss = buf; buf < end; buf++) {
755
unsigned int ch = *buf;
756
int s_len; /* Special encoding sequence length */
759
* Escape certain characters: X.680/11.15
761
if(ch < sizeof(OCTET_STRING__xer_escape_table)
762
/sizeof(OCTET_STRING__xer_escape_table[0])
763
&& (s_len = OCTET_STRING__xer_escape_table[ch].size)) {
764
if(((buf - ss) && cb(ss, buf - ss, app_key) < 0)
765
|| cb(OCTET_STRING__xer_escape_table[ch].string, s_len,
768
encoded_len += (buf - ss) + s_len;
773
encoded_len += (buf - ss);
774
if((buf - ss) && cb(ss, buf - ss, app_key) < 0)
777
er.encoded = encoded_len;
782
* Convert from hexadecimal format (cstring): "AB CD EF"
784
static ssize_t OCTET_STRING__convert_hexadecimal(void *sptr, const void *chunk_buf, size_t chunk_size, int have_more) {
785
OCTET_STRING_t *st = (OCTET_STRING_t *)sptr;
786
const char *chunk_stop = (const char *)chunk_buf;
787
const char *p = chunk_stop;
788
const char *pend = p + chunk_size;
789
unsigned int clv = 0;
790
int half = 0; /* Half bit */
793
/* Reallocate buffer according to high cap estimation */
794
ssize_t _ns = st->size + (chunk_size + 1) / 2;
795
void *nptr = REALLOC(st->buf, _ns + 1);
797
st->buf = (uint8_t *)nptr;
798
buf = st->buf + st->size;
801
* If something like " a b c " appears here, the " a b":3 will be
802
* converted, and the rest skipped. That is, unless buf_size is greater
803
* than chunk_size, then it'll be equivalent to "ABC0".
805
for(; p < pend; p++) {
806
int ch = *(const unsigned char *)p;
808
case 0x09: case 0x0a: case 0x0c: case 0x0d:
810
/* Ignore whitespace */
812
case 0x30: case 0x31: case 0x32: case 0x33: case 0x34: /*01234*/
813
case 0x35: case 0x36: case 0x37: case 0x38: case 0x39: /*56789*/
814
clv = (clv << 4) + (ch - 0x30);
816
case 0x41: case 0x42: case 0x43: /* ABC */
817
case 0x44: case 0x45: case 0x46: /* DEF */
818
clv = (clv << 4) + (ch - 0x41 + 10);
820
case 0x61: case 0x62: case 0x63: /* abc */
821
case 0x64: case 0x65: case 0x66: /* def */
822
clv = (clv << 4) + (ch - 0x61 + 10);
836
* Check partial decoding.
841
* Partial specification is fine,
842
* because no more more PXER_TEXT data is available.
851
st->size = buf - st->buf; /* Adjust the buffer size */
852
assert(st->size <= _ns);
853
st->buf[st->size] = 0; /* Courtesy termination */
855
return (chunk_stop - (const char *)chunk_buf); /* Converted size */
859
* Convert from binary format: "00101011101"
861
static ssize_t OCTET_STRING__convert_binary(void *sptr, const void *chunk_buf, size_t chunk_size, int have_more) {
862
BIT_STRING_t *st = (BIT_STRING_t *)sptr;
863
const char *p = (const char *)chunk_buf;
864
const char *pend = p + chunk_size;
865
int bits_unused = st->bits_unused & 0x7;
868
/* Reallocate buffer according to high cap estimation */
869
ssize_t _ns = st->size + (chunk_size + 7) / 8;
870
void *nptr = REALLOC(st->buf, _ns + 1);
872
st->buf = (uint8_t *)nptr;
873
buf = st->buf + st->size;
883
* Convert series of 0 and 1 into the octet string.
885
for(; p < pend; p++) {
886
int ch = *(const unsigned char *)p;
888
case 0x09: case 0x0a: case 0x0c: case 0x0d:
890
/* Ignore whitespace */
894
if(bits_unused-- <= 0) {
895
*++buf = 0; /* Clean the cell */
898
*buf |= (ch&1) << bits_unused;
901
st->bits_unused = bits_unused;
906
if(bits_unused == 8) {
907
st->size = buf - st->buf;
910
st->size = buf - st->buf + 1;
911
st->bits_unused = bits_unused;
914
assert(st->size <= _ns);
915
st->buf[st->size] = 0; /* Courtesy termination */
917
return chunk_size; /* Converted in full */
921
* Something like strtod(), but with stricter rules.
924
OS__strtoent(int base, const char *buf, const char *end, int32_t *ret_value) {
928
for(p = buf; p < end; p++) {
930
if((val * base + base) < 0) return -1; /* Strange huge value */
932
case 0x30: case 0x31: case 0x32: case 0x33: case 0x34: /*01234*/
933
case 0x35: case 0x36: case 0x37: case 0x38: case 0x39: /*56789*/
934
val = val * base + (ch - 0x30);
936
case 0x41: case 0x42: case 0x43: /* ABC */
937
case 0x44: case 0x45: case 0x46: /* DEF */
938
val = val * base + (ch - 0x41 + 10);
940
case 0x61: case 0x62: case 0x63: /* abc */
941
case 0x64: case 0x65: case 0x66: /* def */
942
val = val * base + (ch - 0x61 + 10);
946
return (p - buf) + 1;
948
return -1; /* Character set error */
952
/* Do not return value. It's an error we're talking about here. */
957
* Convert from the plain UTF-8 format, expanding entity references: "2 < 3"
959
static ssize_t OCTET_STRING__convert_entrefs(void *sptr, const void *chunk_buf, size_t chunk_size, int have_more) {
960
OCTET_STRING_t *st = (OCTET_STRING_t *)sptr;
961
const char *p = (const char *)chunk_buf;
962
const char *pend = p + chunk_size;
965
/* Reallocate buffer */
966
ssize_t _ns = st->size + chunk_size;
967
void *nptr = REALLOC(st->buf, _ns + 1);
969
st->buf = (uint8_t *)nptr;
970
buf = st->buf + st->size;
973
* Convert series of 0 and 1 into the octet string.
975
for(; p < pend; p++) {
976
int ch = *(const unsigned char *)p;
977
int len; /* Length of the rest of the chunk */
979
if(ch != 0x26 /* '&' */) {
981
continue; /* That was easy... */
985
* Process entity reference.
987
len = chunk_size - (p - (const char *)chunk_buf);
988
if(len == 1 /* "&" */) goto want_more;
989
if(p[1] == 0x23 /* '#' */) {
990
const char *pval; /* Pointer to start of digits */
991
int32_t val; /* Entity reference value */
994
if(len == 2 /* "&#" */) goto want_more;
995
if(p[2] == 0x78 /* 'x' */)
996
pval = p + 3, base = 16;
998
pval = p + 2, base = 10;
999
len = OS__strtoent(base, pval, p + len, &val);
1001
/* Invalid charset. Just copy verbatim. */
1005
if(!len || pval[len-1] != 0x3b) goto want_more;
1007
p += (pval - p) + len - 1; /* Advance past entref */
1011
} else if(val < 0x800) {
1012
*buf++ = 0xc0 | ((val >> 6));
1013
*buf++ = 0x80 | ((val & 0x3f));
1014
} else if(val < 0x10000) {
1015
*buf++ = 0xe0 | ((val >> 12));
1016
*buf++ = 0x80 | ((val >> 6) & 0x3f);
1017
*buf++ = 0x80 | ((val & 0x3f));
1018
} else if(val < 0x200000) {
1019
*buf++ = 0xf0 | ((val >> 18));
1020
*buf++ = 0x80 | ((val >> 12) & 0x3f);
1021
*buf++ = 0x80 | ((val >> 6) & 0x3f);
1022
*buf++ = 0x80 | ((val & 0x3f));
1023
} else if(val < 0x4000000) {
1024
*buf++ = 0xf8 | ((val >> 24));
1025
*buf++ = 0x80 | ((val >> 18) & 0x3f);
1026
*buf++ = 0x80 | ((val >> 12) & 0x3f);
1027
*buf++ = 0x80 | ((val >> 6) & 0x3f);
1028
*buf++ = 0x80 | ((val & 0x3f));
1030
*buf++ = 0xfc | ((val >> 30) & 0x1);
1031
*buf++ = 0x80 | ((val >> 24) & 0x3f);
1032
*buf++ = 0x80 | ((val >> 18) & 0x3f);
1033
*buf++ = 0x80 | ((val >> 12) & 0x3f);
1034
*buf++ = 0x80 | ((val >> 6) & 0x3f);
1035
*buf++ = 0x80 | ((val & 0x3f));
1039
* Ugly, limited parsing of & > <
1041
char *sc = (char *)memchr(p, 0x3b, len > 5 ? 5 : len);
1042
if(!sc) goto want_more;
1044
&& p[1] == 0x61 /* 'a' */
1045
&& p[2] == 0x6d /* 'm' */
1046
&& p[3] == 0x70 /* 'p' */) {
1053
*buf = 0x3c; /* '<' */
1054
} else if(p[1] == 0x67) {
1055
*buf = 0x3e; /* '>' */
1057
/* Unsupported entity reference */
1062
/* Unsupported entity reference */
1070
/* Unsupported entity reference */
1078
* We know that no more data (of the same type)
1079
* is coming. Copy the rest verbatim.
1084
chunk_size = (p - (const char *)chunk_buf);
1085
/* Processing stalled: need more data */
1089
st->size = buf - st->buf;
1090
assert(st->size <= _ns);
1091
st->buf[st->size] = 0; /* Courtesy termination */
1093
return chunk_size; /* Converted in full */
1097
* Decode OCTET STRING from the XML element's body.
1099
static asn_dec_rval_t
1100
OCTET_STRING__decode_xer(asn_codec_ctx_t *opt_codec_ctx,
1101
asn_TYPE_descriptor_t *td, void **sptr,
1102
const char *opt_mname, const void *buf_ptr, size_t size,
1103
int (*opt_unexpected_tag_decoder)
1104
(void *struct_ptr, const void *chunk_buf, size_t chunk_size),
1105
ssize_t (*body_receiver)
1106
(void *struct_ptr, const void *chunk_buf, size_t chunk_size,
1109
OCTET_STRING_t *st = (OCTET_STRING_t *)*sptr;
1110
asn_OCTET_STRING_specifics_t *specs = td->specifics
1111
? (asn_OCTET_STRING_specifics_t *)td->specifics
1112
: &asn_DEF_OCTET_STRING_specs;
1113
const char *xml_tag = opt_mname ? opt_mname : td->xml_tag;
1114
asn_struct_ctx_t *ctx; /* Per-structure parser context */
1115
asn_dec_rval_t rval; /* Return value from the decoder */
1119
* Create the string if does not exist.
1122
st = (OCTET_STRING_t *)CALLOC(1, specs->struct_size);
1124
if(!st) goto sta_failed;
1130
/* This is separate from above section */
1131
st->buf = (uint8_t *)CALLOC(1, 1);
1142
/* Restore parsing context */
1143
ctx = (asn_struct_ctx_t *)(((char *)*sptr) + specs->ctx_offset);
1145
return xer_decode_general(opt_codec_ctx, ctx, *sptr, xml_tag,
1146
buf_ptr, size, opt_unexpected_tag_decoder, body_receiver);
1151
rval.code = RC_FAIL;
1157
* Decode OCTET STRING from the hexadecimal data.
1160
OCTET_STRING_decode_xer_hex(asn_codec_ctx_t *opt_codec_ctx,
1161
asn_TYPE_descriptor_t *td, void **sptr,
1162
const char *opt_mname, const void *buf_ptr, size_t size) {
1163
return OCTET_STRING__decode_xer(opt_codec_ctx, td, sptr, opt_mname,
1164
buf_ptr, size, 0, OCTET_STRING__convert_hexadecimal);
1168
* Decode OCTET STRING from the binary (0/1) data.
1171
OCTET_STRING_decode_xer_binary(asn_codec_ctx_t *opt_codec_ctx,
1172
asn_TYPE_descriptor_t *td, void **sptr,
1173
const char *opt_mname, const void *buf_ptr, size_t size) {
1174
return OCTET_STRING__decode_xer(opt_codec_ctx, td, sptr, opt_mname,
1175
buf_ptr, size, 0, OCTET_STRING__convert_binary);
1179
* Decode OCTET STRING from the string (ASCII/UTF-8) data.
1182
OCTET_STRING_decode_xer_utf8(asn_codec_ctx_t *opt_codec_ctx,
1183
asn_TYPE_descriptor_t *td, void **sptr,
1184
const char *opt_mname, const void *buf_ptr, size_t size) {
1185
return OCTET_STRING__decode_xer(opt_codec_ctx, td, sptr, opt_mname,
1187
OCTET_STRING__handle_control_chars,
1188
OCTET_STRING__convert_entrefs);
1193
OCTET_STRING_print(asn_TYPE_descriptor_t *td, const void *sptr, int ilevel,
1194
asn_app_consume_bytes_f *cb, void *app_key) {
1195
static const char *h2c = "0123456789ABCDEF";
1196
const OCTET_STRING_t *st = (const OCTET_STRING_t *)sptr;
1197
char scratch[16 * 3 + 4];
1203
(void)td; /* Unused argument */
1205
if(!st || !st->buf) return (cb("<absent>", 8, app_key) < 0) ? -1 : 0;
1208
* Dump the contents of the buffer in hexadecimal.
1211
end = buf + st->size;
1212
for(i = 0; buf < end; buf++, i++) {
1213
if(!(i % 16) && (i || st->size > 16)) {
1214
if(cb(scratch, p - scratch, app_key) < 0)
1219
*p++ = h2c[(*buf >> 4) & 0x0F];
1220
*p++ = h2c[*buf & 0x0F];
1225
p--; /* Remove the tail space */
1226
if(cb(scratch, p - scratch, app_key) < 0)
1234
OCTET_STRING_print_utf8(asn_TYPE_descriptor_t *td, const void *sptr,
1235
int ilevel, asn_app_consume_bytes_f *cb, void *app_key) {
1236
const OCTET_STRING_t *st = (const OCTET_STRING_t *)sptr;
1238
(void)td; /* Unused argument */
1239
(void)ilevel; /* Unused argument */
1242
return (cb(st->buf, st->size, app_key) < 0) ? -1 : 0;
1244
return (cb("<absent>", 8, app_key) < 0) ? -1 : 0;
1249
OCTET_STRING_free(asn_TYPE_descriptor_t *td, void *sptr, int contents_only) {
1250
OCTET_STRING_t *st = (OCTET_STRING_t *)sptr;
1251
asn_OCTET_STRING_specifics_t *specs = td->specifics
1252
? (asn_OCTET_STRING_specifics_t *)td->specifics
1253
: &asn_DEF_OCTET_STRING_specs;
1254
asn_struct_ctx_t *ctx = (asn_struct_ctx_t *)
1255
((char *)st + specs->ctx_offset);
1256
struct _stack *stck;
1261
ASN_DEBUG("Freeing %s as OCTET STRING", td->name);
1268
* Remove decode-time stack.
1270
stck = (struct _stack *)ctx->ptr;
1273
struct _stack_el *sel = stck->tail;
1274
stck->tail = sel->prev;
1280
if(!contents_only) {
1286
* Conversion routines.
1289
OCTET_STRING_fromBuf(OCTET_STRING_t *st, const char *str, int len) {
1292
if(st == 0 || (str == 0 && len)) {
1298
* Clear the OCTET STRING.
1307
/* Determine the original string size, if not explicitly given */
1311
/* Allocate and fill the memory */
1312
buf = MALLOC(len + 1);
1316
st->buf = (uint8_t *)buf;
1320
memcpy(buf, str, len);
1321
st->buf[st->size] = '\0'; /* Couldn't use memcpy(len+1)! */
1327
OCTET_STRING_new_fromBuf(asn_TYPE_descriptor_t *td, const char *str, int len) {
1328
asn_OCTET_STRING_specifics_t *specs = td->specifics
1329
? (asn_OCTET_STRING_specifics_t *)td->specifics
1330
: &asn_DEF_OCTET_STRING_specs;
1333
st = (OCTET_STRING_t *)CALLOC(1, specs->struct_size);
1334
if(st && str && OCTET_STRING_fromBuf(st, str, len)) {
added
removed
skeletons/OCTET_STRING.c
