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-rw-r--r--src/lib/libcrypto/asn1/tasn_enc.c654
1 files changed, 0 insertions, 654 deletions
diff --git a/src/lib/libcrypto/asn1/tasn_enc.c b/src/lib/libcrypto/asn1/tasn_enc.c
deleted file mode 100644
index c59033e54d..0000000000
--- a/src/lib/libcrypto/asn1/tasn_enc.c
+++ /dev/null
@@ -1,654 +0,0 @@
1/* $OpenBSD: tasn_enc.c,v 1.16 2015/02/14 15:23:57 miod Exp $ */
2/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
3 * project 2000.
4 */
5/* ====================================================================
6 * Copyright (c) 2000-2004 The OpenSSL Project. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in
17 * the documentation and/or other materials provided with the
18 * distribution.
19 *
20 * 3. All advertising materials mentioning features or use of this
21 * software must display the following acknowledgment:
22 * "This product includes software developed by the OpenSSL Project
23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24 *
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26 * endorse or promote products derived from this software without
27 * prior written permission. For written permission, please contact
28 * licensing@OpenSSL.org.
29 *
30 * 5. Products derived from this software may not be called "OpenSSL"
31 * nor may "OpenSSL" appear in their names without prior written
32 * permission of the OpenSSL Project.
33 *
34 * 6. Redistributions of any form whatsoever must retain the following
35 * acknowledgment:
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38 *
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
52 *
53 * This product includes cryptographic software written by Eric Young
54 * (eay@cryptsoft.com). This product includes software written by Tim
55 * Hudson (tjh@cryptsoft.com).
56 *
57 */
58
59#include <stddef.h>
60#include <string.h>
61
62#include <openssl/asn1.h>
63#include <openssl/asn1t.h>
64#include <openssl/objects.h>
65
66static int asn1_i2d_ex_primitive(ASN1_VALUE **pval, unsigned char **out,
67 const ASN1_ITEM *it, int tag, int aclass);
68static int asn1_set_seq_out(STACK_OF(ASN1_VALUE) *sk, unsigned char **out,
69 int skcontlen, const ASN1_ITEM *item, int do_sort, int iclass);
70static int asn1_template_ex_i2d(ASN1_VALUE **pval, unsigned char **out,
71 const ASN1_TEMPLATE *tt, int tag, int aclass);
72static int asn1_item_flags_i2d(ASN1_VALUE *val, unsigned char **out,
73 const ASN1_ITEM *it, int flags);
74static int asn1_ex_i2c(ASN1_VALUE **pval, unsigned char *cout, int *putype,
75 const ASN1_ITEM *it);
76
77/* Top level i2d equivalents: the 'ndef' variant instructs the encoder
78 * to use indefinite length constructed encoding, where appropriate
79 */
80
81int
82ASN1_item_ndef_i2d(ASN1_VALUE *val, unsigned char **out, const ASN1_ITEM *it)
83{
84 return asn1_item_flags_i2d(val, out, it, ASN1_TFLG_NDEF);
85}
86
87int
88ASN1_item_i2d(ASN1_VALUE *val, unsigned char **out, const ASN1_ITEM *it)
89{
90 return asn1_item_flags_i2d(val, out, it, 0);
91}
92
93/* Encode an ASN1 item, this is use by the
94 * standard 'i2d' function. 'out' points to
95 * a buffer to output the data to.
96 *
97 * The new i2d has one additional feature. If the output
98 * buffer is NULL (i.e. *out == NULL) then a buffer is
99 * allocated and populated with the encoding.
100 */
101
102static int
103asn1_item_flags_i2d(ASN1_VALUE *val, unsigned char **out, const ASN1_ITEM *it,
104 int flags)
105{
106 if (out && !*out) {
107 unsigned char *p, *buf;
108 int len;
109 len = ASN1_item_ex_i2d(&val, NULL, it, -1, flags);
110 if (len <= 0)
111 return len;
112 buf = malloc(len);
113 if (!buf)
114 return -1;
115 p = buf;
116 ASN1_item_ex_i2d(&val, &p, it, -1, flags);
117 *out = buf;
118 return len;
119 }
120
121 return ASN1_item_ex_i2d(&val, out, it, -1, flags);
122}
123
124/* Encode an item, taking care of IMPLICIT tagging (if any).
125 * This function performs the normal item handling: it can be
126 * used in external types.
127 */
128
129int
130ASN1_item_ex_i2d(ASN1_VALUE **pval, unsigned char **out, const ASN1_ITEM *it,
131 int tag, int aclass)
132{
133 const ASN1_TEMPLATE *tt = NULL;
134 int i, seqcontlen, seqlen, ndef = 1;
135 const ASN1_EXTERN_FUNCS *ef;
136 const ASN1_AUX *aux = it->funcs;
137 ASN1_aux_cb *asn1_cb = 0;
138
139 if ((it->itype != ASN1_ITYPE_PRIMITIVE) && !*pval)
140 return 0;
141
142 if (aux && aux->asn1_cb)
143 asn1_cb = aux->asn1_cb;
144
145 switch (it->itype) {
146
147 case ASN1_ITYPE_PRIMITIVE:
148 if (it->templates)
149 return asn1_template_ex_i2d(pval, out, it->templates,
150 tag, aclass);
151 return asn1_i2d_ex_primitive(pval, out, it, tag, aclass);
152 break;
153
154 case ASN1_ITYPE_MSTRING:
155 return asn1_i2d_ex_primitive(pval, out, it, -1, aclass);
156
157 case ASN1_ITYPE_CHOICE:
158 if (asn1_cb && !asn1_cb(ASN1_OP_I2D_PRE, pval, it, NULL))
159 return 0;
160 i = asn1_get_choice_selector(pval, it);
161 if ((i >= 0) && (i < it->tcount)) {
162 ASN1_VALUE **pchval;
163 const ASN1_TEMPLATE *chtt;
164 chtt = it->templates + i;
165 pchval = asn1_get_field_ptr(pval, chtt);
166 return asn1_template_ex_i2d(pchval, out, chtt,
167 -1, aclass);
168 }
169 /* Fixme: error condition if selector out of range */
170 if (asn1_cb && !asn1_cb(ASN1_OP_I2D_POST, pval, it, NULL))
171 return 0;
172 break;
173
174 case ASN1_ITYPE_EXTERN:
175 /* If new style i2d it does all the work */
176 ef = it->funcs;
177 return ef->asn1_ex_i2d(pval, out, it, tag, aclass);
178
179 case ASN1_ITYPE_NDEF_SEQUENCE:
180 /* Use indefinite length constructed if requested */
181 if (aclass & ASN1_TFLG_NDEF)
182 ndef = 2;
183 /* fall through */
184
185 case ASN1_ITYPE_SEQUENCE:
186 i = asn1_enc_restore(&seqcontlen, out, pval, it);
187 /* An error occurred */
188 if (i < 0)
189 return 0;
190 /* We have a valid cached encoding... */
191 if (i > 0)
192 return seqcontlen;
193 /* Otherwise carry on */
194 seqcontlen = 0;
195 /* If no IMPLICIT tagging set to SEQUENCE, UNIVERSAL */
196 if (tag == -1) {
197 tag = V_ASN1_SEQUENCE;
198 /* Retain any other flags in aclass */
199 aclass = (aclass & ~ASN1_TFLG_TAG_CLASS) |
200 V_ASN1_UNIVERSAL;
201 }
202 if (asn1_cb && !asn1_cb(ASN1_OP_I2D_PRE, pval, it, NULL))
203 return 0;
204 /* First work out sequence content length */
205 for (i = 0, tt = it->templates; i < it->tcount; tt++, i++) {
206 const ASN1_TEMPLATE *seqtt;
207 ASN1_VALUE **pseqval;
208 seqtt = asn1_do_adb(pval, tt, 1);
209 if (!seqtt)
210 return 0;
211 pseqval = asn1_get_field_ptr(pval, seqtt);
212 /* FIXME: check for errors in enhanced version */
213 seqcontlen += asn1_template_ex_i2d(pseqval, NULL, seqtt,
214 -1, aclass);
215 }
216
217 seqlen = ASN1_object_size(ndef, seqcontlen, tag);
218 if (!out)
219 return seqlen;
220 /* Output SEQUENCE header */
221 ASN1_put_object(out, ndef, seqcontlen, tag, aclass);
222 for (i = 0, tt = it->templates; i < it->tcount; tt++, i++) {
223 const ASN1_TEMPLATE *seqtt;
224 ASN1_VALUE **pseqval;
225 seqtt = asn1_do_adb(pval, tt, 1);
226 if (!seqtt)
227 return 0;
228 pseqval = asn1_get_field_ptr(pval, seqtt);
229 /* FIXME: check for errors in enhanced version */
230 asn1_template_ex_i2d(pseqval, out, seqtt, -1, aclass);
231 }
232 if (ndef == 2)
233 ASN1_put_eoc(out);
234 if (asn1_cb && !asn1_cb(ASN1_OP_I2D_POST, pval, it, NULL))
235 return 0;
236 return seqlen;
237
238 default:
239 return 0;
240
241 }
242 return 0;
243}
244
245int
246ASN1_template_i2d(ASN1_VALUE **pval, unsigned char **out,
247 const ASN1_TEMPLATE *tt)
248{
249 return asn1_template_ex_i2d(pval, out, tt, -1, 0);
250}
251
252static int
253asn1_template_ex_i2d(ASN1_VALUE **pval, unsigned char **out,
254 const ASN1_TEMPLATE *tt, int tag, int iclass)
255{
256 int i, ret, flags, ttag, tclass, ndef;
257 flags = tt->flags;
258 /* Work out tag and class to use: tagging may come
259 * either from the template or the arguments, not both
260 * because this would create ambiguity. Additionally
261 * the iclass argument may contain some additional flags
262 * which should be noted and passed down to other levels.
263 */
264 if (flags & ASN1_TFLG_TAG_MASK) {
265 /* Error if argument and template tagging */
266 if (tag != -1)
267 /* FIXME: error code here */
268 return -1;
269 /* Get tagging from template */
270 ttag = tt->tag;
271 tclass = flags & ASN1_TFLG_TAG_CLASS;
272 } else if (tag != -1) {
273 /* No template tagging, get from arguments */
274 ttag = tag;
275 tclass = iclass & ASN1_TFLG_TAG_CLASS;
276 } else {
277 ttag = -1;
278 tclass = 0;
279 }
280 /*
281 * Remove any class mask from iflag.
282 */
283 iclass &= ~ASN1_TFLG_TAG_CLASS;
284
285 /* At this point 'ttag' contains the outer tag to use,
286 * 'tclass' is the class and iclass is any flags passed
287 * to this function.
288 */
289
290 /* if template and arguments require ndef, use it */
291 if ((flags & ASN1_TFLG_NDEF) && (iclass & ASN1_TFLG_NDEF))
292 ndef = 2;
293 else
294 ndef = 1;
295
296 if (flags & ASN1_TFLG_SK_MASK) {
297 /* SET OF, SEQUENCE OF */
298 STACK_OF(ASN1_VALUE) *sk = (STACK_OF(ASN1_VALUE) *)*pval;
299 int isset, sktag, skaclass;
300 int skcontlen, sklen;
301 ASN1_VALUE *skitem;
302
303 if (!*pval)
304 return 0;
305
306 if (flags & ASN1_TFLG_SET_OF) {
307 isset = 1;
308 /* 2 means we reorder */
309 if (flags & ASN1_TFLG_SEQUENCE_OF)
310 isset = 2;
311 } else
312 isset = 0;
313
314 /* Work out inner tag value: if EXPLICIT
315 * or no tagging use underlying type.
316 */
317 if ((ttag != -1) && !(flags & ASN1_TFLG_EXPTAG)) {
318 sktag = ttag;
319 skaclass = tclass;
320 } else {
321 skaclass = V_ASN1_UNIVERSAL;
322 if (isset)
323 sktag = V_ASN1_SET;
324 else
325 sktag = V_ASN1_SEQUENCE;
326 }
327
328 /* Determine total length of items */
329 skcontlen = 0;
330 for (i = 0; i < sk_ASN1_VALUE_num(sk); i++) {
331 skitem = sk_ASN1_VALUE_value(sk, i);
332 skcontlen += ASN1_item_ex_i2d(&skitem, NULL,
333 ASN1_ITEM_ptr(tt->item), -1, iclass);
334 }
335 sklen = ASN1_object_size(ndef, skcontlen, sktag);
336 /* If EXPLICIT need length of surrounding tag */
337 if (flags & ASN1_TFLG_EXPTAG)
338 ret = ASN1_object_size(ndef, sklen, ttag);
339 else
340 ret = sklen;
341
342 if (!out)
343 return ret;
344
345 /* Now encode this lot... */
346 /* EXPLICIT tag */
347 if (flags & ASN1_TFLG_EXPTAG)
348 ASN1_put_object(out, ndef, sklen, ttag, tclass);
349 /* SET or SEQUENCE and IMPLICIT tag */
350 ASN1_put_object(out, ndef, skcontlen, sktag, skaclass);
351 /* And the stuff itself */
352 asn1_set_seq_out(sk, out, skcontlen, ASN1_ITEM_ptr(tt->item),
353 isset, iclass);
354 if (ndef == 2) {
355 ASN1_put_eoc(out);
356 if (flags & ASN1_TFLG_EXPTAG)
357 ASN1_put_eoc(out);
358 }
359
360 return ret;
361 }
362
363 if (flags & ASN1_TFLG_EXPTAG) {
364 /* EXPLICIT tagging */
365 /* Find length of tagged item */
366 i = ASN1_item_ex_i2d(pval, NULL, ASN1_ITEM_ptr(tt->item),
367 -1, iclass);
368 if (!i)
369 return 0;
370 /* Find length of EXPLICIT tag */
371 ret = ASN1_object_size(ndef, i, ttag);
372 if (out) {
373 /* Output tag and item */
374 ASN1_put_object(out, ndef, i, ttag, tclass);
375 ASN1_item_ex_i2d(pval, out, ASN1_ITEM_ptr(tt->item),
376 -1, iclass);
377 if (ndef == 2)
378 ASN1_put_eoc(out);
379 }
380 return ret;
381 }
382
383 /* Either normal or IMPLICIT tagging: combine class and flags */
384 return ASN1_item_ex_i2d(pval, out, ASN1_ITEM_ptr(tt->item),
385 ttag, tclass | iclass);
386}
387
388/* Temporary structure used to hold DER encoding of items for SET OF */
389
390typedef struct {
391 unsigned char *data;
392 int length;
393 ASN1_VALUE *field;
394} DER_ENC;
395
396static int
397der_cmp(const void *a, const void *b)
398{
399 const DER_ENC *d1 = a, *d2 = b;
400 int cmplen, i;
401
402 cmplen = (d1->length < d2->length) ? d1->length : d2->length;
403 i = memcmp(d1->data, d2->data, cmplen);
404 if (i)
405 return i;
406 return d1->length - d2->length;
407}
408
409/* Output the content octets of SET OF or SEQUENCE OF */
410
411static int
412asn1_set_seq_out(STACK_OF(ASN1_VALUE) *sk, unsigned char **out, int skcontlen,
413 const ASN1_ITEM *item, int do_sort, int iclass)
414{
415 int i;
416 ASN1_VALUE *skitem;
417 unsigned char *tmpdat = NULL, *p = NULL;
418 DER_ENC *derlst = NULL, *tder;
419
420 if (do_sort) {
421 /* Don't need to sort less than 2 items */
422 if (sk_ASN1_VALUE_num(sk) < 2)
423 do_sort = 0;
424 else {
425 derlst = reallocarray(NULL, sk_ASN1_VALUE_num(sk),
426 sizeof(*derlst));
427 tmpdat = malloc(skcontlen);
428 if (!derlst || !tmpdat) {
429 free(derlst);
430 free(tmpdat);
431 return 0;
432 }
433 }
434 }
435 /* If not sorting just output each item */
436 if (!do_sort) {
437 for (i = 0; i < sk_ASN1_VALUE_num(sk); i++) {
438 skitem = sk_ASN1_VALUE_value(sk, i);
439 ASN1_item_ex_i2d(&skitem, out, item, -1, iclass);
440 }
441 return 1;
442 }
443 p = tmpdat;
444
445 /* Doing sort: build up a list of each member's DER encoding */
446 for (i = 0, tder = derlst; i < sk_ASN1_VALUE_num(sk); i++, tder++) {
447 skitem = sk_ASN1_VALUE_value(sk, i);
448 tder->data = p;
449 tder->length = ASN1_item_ex_i2d(&skitem, &p, item, -1, iclass);
450 tder->field = skitem;
451 }
452
453 /* Now sort them */
454 qsort(derlst, sk_ASN1_VALUE_num(sk), sizeof(*derlst), der_cmp);
455 /* Output sorted DER encoding */
456 p = *out;
457 for (i = 0, tder = derlst; i < sk_ASN1_VALUE_num(sk); i++, tder++) {
458 memcpy(p, tder->data, tder->length);
459 p += tder->length;
460 }
461 *out = p;
462 /* If do_sort is 2 then reorder the STACK */
463 if (do_sort == 2) {
464 for (i = 0, tder = derlst; i < sk_ASN1_VALUE_num(sk); i++, tder++)
465 (void)sk_ASN1_VALUE_set(sk, i, tder->field);
466 }
467 free(derlst);
468 free(tmpdat);
469 return 1;
470}
471
472static int
473asn1_i2d_ex_primitive(ASN1_VALUE **pval, unsigned char **out,
474 const ASN1_ITEM *it, int tag, int aclass)
475{
476 int len;
477 int utype;
478 int usetag;
479 int ndef = 0;
480
481 utype = it->utype;
482
483 /* Get length of content octets and maybe find
484 * out the underlying type.
485 */
486
487 len = asn1_ex_i2c(pval, NULL, &utype, it);
488
489 /* If SEQUENCE, SET or OTHER then header is
490 * included in pseudo content octets so don't
491 * include tag+length. We need to check here
492 * because the call to asn1_ex_i2c() could change
493 * utype.
494 */
495 if ((utype == V_ASN1_SEQUENCE) || (utype == V_ASN1_SET) ||
496 (utype == V_ASN1_OTHER))
497 usetag = 0;
498 else
499 usetag = 1;
500
501 /* -1 means omit type */
502 if (len == -1)
503 return 0;
504
505 /* -2 return is special meaning use ndef */
506 if (len == -2) {
507 ndef = 2;
508 len = 0;
509 }
510
511 /* If not implicitly tagged get tag from underlying type */
512 if (tag == -1)
513 tag = utype;
514
515 /* Output tag+length followed by content octets */
516 if (out) {
517 if (usetag)
518 ASN1_put_object(out, ndef, len, tag, aclass);
519 asn1_ex_i2c(pval, *out, &utype, it);
520 if (ndef)
521 ASN1_put_eoc(out);
522 else
523 *out += len;
524 }
525
526 if (usetag)
527 return ASN1_object_size(ndef, len, tag);
528 return len;
529}
530
531/* Produce content octets from a structure */
532
533static int
534asn1_ex_i2c(ASN1_VALUE **pval, unsigned char *cout, int *putype,
535 const ASN1_ITEM *it)
536{
537 ASN1_BOOLEAN *tbool = NULL;
538 ASN1_STRING *strtmp;
539 ASN1_OBJECT *otmp;
540 int utype;
541 const unsigned char *cont;
542 unsigned char c;
543 int len;
544 const ASN1_PRIMITIVE_FUNCS *pf;
545
546 pf = it->funcs;
547 if (pf && pf->prim_i2c)
548 return pf->prim_i2c(pval, cout, putype, it);
549
550 /* Should type be omitted? */
551 if ((it->itype != ASN1_ITYPE_PRIMITIVE) ||
552 (it->utype != V_ASN1_BOOLEAN)) {
553 if (!*pval)
554 return -1;
555 }
556
557 if (it->itype == ASN1_ITYPE_MSTRING) {
558 /* If MSTRING type set the underlying type */
559 strtmp = (ASN1_STRING *)*pval;
560 utype = strtmp->type;
561 *putype = utype;
562 } else if (it->utype == V_ASN1_ANY) {
563 /* If ANY set type and pointer to value */
564 ASN1_TYPE *typ;
565 typ = (ASN1_TYPE *)*pval;
566 utype = typ->type;
567 *putype = utype;
568 pval = &typ->value.asn1_value;
569 } else
570 utype = *putype;
571
572 switch (utype) {
573 case V_ASN1_OBJECT:
574 otmp = (ASN1_OBJECT *)*pval;
575 cont = otmp->data;
576 len = otmp->length;
577 break;
578
579 case V_ASN1_NULL:
580 cont = NULL;
581 len = 0;
582 break;
583
584 case V_ASN1_BOOLEAN:
585 tbool = (ASN1_BOOLEAN *)pval;
586 if (*tbool == -1)
587 return -1;
588 if (it->utype != V_ASN1_ANY) {
589 /* Default handling if value == size field then omit */
590 if (*tbool && (it->size > 0))
591 return -1;
592 if (!*tbool && !it->size)
593 return -1;
594 }
595 c = (unsigned char)*tbool;
596 cont = &c;
597 len = 1;
598 break;
599
600 case V_ASN1_BIT_STRING:
601 return i2c_ASN1_BIT_STRING((ASN1_BIT_STRING *)*pval,
602 cout ? &cout : NULL);
603 break;
604
605 case V_ASN1_INTEGER:
606 case V_ASN1_NEG_INTEGER:
607 case V_ASN1_ENUMERATED:
608 case V_ASN1_NEG_ENUMERATED:
609 /* These are all have the same content format
610 * as ASN1_INTEGER
611 */
612 return i2c_ASN1_INTEGER((ASN1_INTEGER *)*pval,
613 cout ? &cout : NULL);
614 break;
615
616 case V_ASN1_OCTET_STRING:
617 case V_ASN1_NUMERICSTRING:
618 case V_ASN1_PRINTABLESTRING:
619 case V_ASN1_T61STRING:
620 case V_ASN1_VIDEOTEXSTRING:
621 case V_ASN1_IA5STRING:
622 case V_ASN1_UTCTIME:
623 case V_ASN1_GENERALIZEDTIME:
624 case V_ASN1_GRAPHICSTRING:
625 case V_ASN1_VISIBLESTRING:
626 case V_ASN1_GENERALSTRING:
627 case V_ASN1_UNIVERSALSTRING:
628 case V_ASN1_BMPSTRING:
629 case V_ASN1_UTF8STRING:
630 case V_ASN1_SEQUENCE:
631 case V_ASN1_SET:
632 default:
633 /* All based on ASN1_STRING and handled the same */
634 strtmp = (ASN1_STRING *)*pval;
635 /* Special handling for NDEF */
636 if ((it->size == ASN1_TFLG_NDEF) &&
637 (strtmp->flags & ASN1_STRING_FLAG_NDEF)) {
638 if (cout) {
639 strtmp->data = cout;
640 strtmp->length = 0;
641 }
642 /* Special return code */
643 return -2;
644 }
645 cont = strtmp->data;
646 len = strtmp->length;
647
648 break;
649
650 }
651 if (cout && len)
652 memcpy(cout, cont, len);
653 return len;
654}
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