1 /* tasn_enc.c */
2 /*
3  * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
4  * 2000.
5  */
6 /* ====================================================================
7  * Copyright (c) 2000-2004 The OpenSSL Project.  All rights reserved.
8  *
9  * Redistribution and use in source and binary forms, with or without
10  * modification, are permitted provided that the following conditions
11  * are met:
12  *
13  * 1. Redistributions of source code must retain the above copyright
14  *    notice, this list of conditions and the following disclaimer.
15  *
16  * 2. Redistributions in binary form must reproduce the above copyright
17  *    notice, this list of conditions and the following disclaimer in
18  *    the documentation and/or other materials provided with the
19  *    distribution.
20  *
21  * 3. All advertising materials mentioning features or use of this
22  *    software must display the following acknowledgment:
23  *    "This product includes software developed by the OpenSSL Project
24  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
25  *
26  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
27  *    endorse or promote products derived from this software without
28  *    prior written permission. For written permission, please contact
29  *    licensing@OpenSSL.org.
30  *
31  * 5. Products derived from this software may not be called "OpenSSL"
32  *    nor may "OpenSSL" appear in their names without prior written
33  *    permission of the OpenSSL Project.
34  *
35  * 6. Redistributions of any form whatsoever must retain the following
36  *    acknowledgment:
37  *    "This product includes software developed by the OpenSSL Project
38  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
39  *
40  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
41  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
43  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
44  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
45  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
46  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
47  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
49  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
50  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
51  * OF THE POSSIBILITY OF SUCH DAMAGE.
52  * ====================================================================
53  *
54  * This product includes cryptographic software written by Eric Young
55  * (eay@cryptsoft.com).  This product includes software written by Tim
56  * Hudson (tjh@cryptsoft.com).
57  *
58  */
59 
60 #include <stddef.h>
61 #include <string.h>
62 #include <limits.h>
63 #include "cryptlib.h"
64 #include <openssl/asn1.h>
65 #include <openssl/asn1t.h>
66 #include <openssl/objects.h>
67 
68 static int asn1_i2d_ex_primitive(ASN1_VALUE **pval, unsigned char **out,
69                                  const ASN1_ITEM *it, int tag, int aclass);
70 static int asn1_set_seq_out(STACK_OF(ASN1_VALUE) *sk, unsigned char **out,
71                             int skcontlen, const ASN1_ITEM *item,
72                             int do_sort, int iclass);
73 static int asn1_template_ex_i2d(ASN1_VALUE **pval, unsigned char **out,
74                                 const ASN1_TEMPLATE *tt, int tag, int aclass);
75 static int asn1_item_flags_i2d(ASN1_VALUE *val, unsigned char **out,
76                                const ASN1_ITEM *it, int flags);
77 
78 /*
79  * Top level i2d equivalents: the 'ndef' variant instructs the encoder to use
80  * indefinite length constructed encoding, where appropriate
81  */
82 
ASN1_item_ndef_i2d(ASN1_VALUE * val,unsigned char ** out,const ASN1_ITEM * it)83 int ASN1_item_ndef_i2d(ASN1_VALUE *val, unsigned char **out,
84                        const ASN1_ITEM *it)
85 {
86     return asn1_item_flags_i2d(val, out, it, ASN1_TFLG_NDEF);
87 }
88 
ASN1_item_i2d(ASN1_VALUE * val,unsigned char ** out,const ASN1_ITEM * it)89 int ASN1_item_i2d(ASN1_VALUE *val, unsigned char **out, const ASN1_ITEM *it)
90 {
91     return asn1_item_flags_i2d(val, out, it, 0);
92 }
93 
94 /*
95  * Encode an ASN1 item, this is use by the standard 'i2d' function. 'out'
96  * points to a buffer to output the data to. The new i2d has one additional
97  * feature. If the output buffer is NULL (i.e. *out == NULL) then a buffer is
98  * allocated and populated with the encoding.
99  */
100 
asn1_item_flags_i2d(ASN1_VALUE * val,unsigned char ** out,const ASN1_ITEM * it,int flags)101 static int asn1_item_flags_i2d(ASN1_VALUE *val, unsigned char **out,
102                                const ASN1_ITEM *it, int flags)
103 {
104     if (out && !*out) {
105         unsigned char *p, *buf;
106         int len;
107         len = ASN1_item_ex_i2d(&val, NULL, it, -1, flags);
108         if (len <= 0)
109             return len;
110         buf = OPENSSL_malloc(len);
111         if (!buf)
112             return -1;
113         p = buf;
114         ASN1_item_ex_i2d(&val, &p, it, -1, flags);
115         *out = buf;
116         return len;
117     }
118 
119     return ASN1_item_ex_i2d(&val, out, it, -1, flags);
120 }
121 
122 /*
123  * Encode an item, taking care of IMPLICIT tagging (if any). This function
124  * performs the normal item handling: it can be used in external types.
125  */
126 
ASN1_item_ex_i2d(ASN1_VALUE ** pval,unsigned char ** out,const ASN1_ITEM * it,int tag,int aclass)127 int ASN1_item_ex_i2d(ASN1_VALUE **pval, unsigned char **out,
128                      const ASN1_ITEM *it, int tag, int aclass)
129 {
130     const ASN1_TEMPLATE *tt = NULL;
131     unsigned char *p = NULL;
132     int i, seqcontlen, seqlen, ndef = 1;
133     const ASN1_COMPAT_FUNCS *cf;
134     const ASN1_EXTERN_FUNCS *ef;
135     const ASN1_AUX *aux = it->funcs;
136     ASN1_aux_cb *asn1_cb = 0;
137 
138     if ((it->itype != ASN1_ITYPE_PRIMITIVE) && !*pval)
139         return 0;
140 
141     if (aux && aux->asn1_cb)
142         asn1_cb = aux->asn1_cb;
143 
144     switch (it->itype) {
145 
146     case ASN1_ITYPE_PRIMITIVE:
147         if (it->templates)
148             return asn1_template_ex_i2d(pval, out, it->templates,
149                                         tag, aclass);
150         return asn1_i2d_ex_primitive(pval, out, it, tag, aclass);
151         break;
152 
153     case ASN1_ITYPE_MSTRING:
154         return asn1_i2d_ex_primitive(pval, out, it, -1, aclass);
155 
156     case ASN1_ITYPE_CHOICE:
157         if (asn1_cb && !asn1_cb(ASN1_OP_I2D_PRE, pval, it, NULL))
158             return 0;
159         i = asn1_get_choice_selector(pval, it);
160         if ((i >= 0) && (i < it->tcount)) {
161             ASN1_VALUE **pchval;
162             const ASN1_TEMPLATE *chtt;
163             chtt = it->templates + i;
164             pchval = asn1_get_field_ptr(pval, chtt);
165             return asn1_template_ex_i2d(pchval, out, chtt, -1, aclass);
166         }
167         /* Fixme: error condition if selector out of range */
168         if (asn1_cb && !asn1_cb(ASN1_OP_I2D_POST, pval, it, NULL))
169             return 0;
170         break;
171 
172     case ASN1_ITYPE_EXTERN:
173         /* If new style i2d it does all the work */
174         ef = it->funcs;
175         return ef->asn1_ex_i2d(pval, out, it, tag, aclass);
176 
177     case ASN1_ITYPE_COMPAT:
178         /* old style hackery... */
179         cf = it->funcs;
180         if (out)
181             p = *out;
182         i = cf->asn1_i2d(*pval, out);
183         /*
184          * Fixup for IMPLICIT tag: note this messes up for tags > 30, but so
185          * did the old code. Tags > 30 are very rare anyway.
186          */
187         if (out && (tag != -1))
188             *p = aclass | tag | (*p & V_ASN1_CONSTRUCTED);
189         return i;
190 
191     case ASN1_ITYPE_NDEF_SEQUENCE:
192         /* Use indefinite length constructed if requested */
193         if (aclass & ASN1_TFLG_NDEF)
194             ndef = 2;
195         /* fall through */
196 
197     case ASN1_ITYPE_SEQUENCE:
198         i = asn1_enc_restore(&seqcontlen, out, pval, it);
199         /* An error occurred */
200         if (i < 0)
201             return 0;
202         /* We have a valid cached encoding... */
203         if (i > 0)
204             return seqcontlen;
205         /* Otherwise carry on */
206         seqcontlen = 0;
207         /* If no IMPLICIT tagging set to SEQUENCE, UNIVERSAL */
208         if (tag == -1) {
209             tag = V_ASN1_SEQUENCE;
210             /* Retain any other flags in aclass */
211             aclass = (aclass & ~ASN1_TFLG_TAG_CLASS)
212                 | V_ASN1_UNIVERSAL;
213         }
214         if (asn1_cb && !asn1_cb(ASN1_OP_I2D_PRE, pval, it, NULL))
215             return 0;
216         /* First work out sequence content length */
217         for (i = 0, tt = it->templates; i < it->tcount; tt++, i++) {
218             const ASN1_TEMPLATE *seqtt;
219             ASN1_VALUE **pseqval;
220             int tmplen;
221             seqtt = asn1_do_adb(pval, tt, 1);
222             if (!seqtt)
223                 return 0;
224             pseqval = asn1_get_field_ptr(pval, seqtt);
225             tmplen = asn1_template_ex_i2d(pseqval, NULL, seqtt, -1, aclass);
226             if (tmplen == -1 || (tmplen > INT_MAX - seqcontlen))
227                 return -1;
228             seqcontlen += tmplen;
229         }
230 
231         seqlen = ASN1_object_size(ndef, seqcontlen, tag);
232         if (!out || seqlen == -1)
233             return seqlen;
234         /* Output SEQUENCE header */
235         ASN1_put_object(out, ndef, seqcontlen, tag, aclass);
236         for (i = 0, tt = it->templates; i < it->tcount; tt++, i++) {
237             const ASN1_TEMPLATE *seqtt;
238             ASN1_VALUE **pseqval;
239             seqtt = asn1_do_adb(pval, tt, 1);
240             if (!seqtt)
241                 return 0;
242             pseqval = asn1_get_field_ptr(pval, seqtt);
243             /* FIXME: check for errors in enhanced version */
244             asn1_template_ex_i2d(pseqval, out, seqtt, -1, aclass);
245         }
246         if (ndef == 2)
247             ASN1_put_eoc(out);
248         if (asn1_cb && !asn1_cb(ASN1_OP_I2D_POST, pval, it, NULL))
249             return 0;
250         return seqlen;
251 
252     default:
253         return 0;
254 
255     }
256     return 0;
257 }
258 
ASN1_template_i2d(ASN1_VALUE ** pval,unsigned char ** out,const ASN1_TEMPLATE * tt)259 int ASN1_template_i2d(ASN1_VALUE **pval, unsigned char **out,
260                       const ASN1_TEMPLATE *tt)
261 {
262     return asn1_template_ex_i2d(pval, out, tt, -1, 0);
263 }
264 
asn1_template_ex_i2d(ASN1_VALUE ** pval,unsigned char ** out,const ASN1_TEMPLATE * tt,int tag,int iclass)265 static int asn1_template_ex_i2d(ASN1_VALUE **pval, unsigned char **out,
266                                 const ASN1_TEMPLATE *tt, int tag, int iclass)
267 {
268     int i, ret, flags, ttag, tclass, ndef;
269     flags = tt->flags;
270     /*
271      * Work out tag and class to use: tagging may come either from the
272      * template or the arguments, not both because this would create
273      * ambiguity. Additionally the iclass argument may contain some
274      * additional flags which should be noted and passed down to other
275      * levels.
276      */
277     if (flags & ASN1_TFLG_TAG_MASK) {
278         /* Error if argument and template tagging */
279         if (tag != -1)
280             /* FIXME: error code here */
281             return -1;
282         /* Get tagging from template */
283         ttag = tt->tag;
284         tclass = flags & ASN1_TFLG_TAG_CLASS;
285     } else if (tag != -1) {
286         /* No template tagging, get from arguments */
287         ttag = tag;
288         tclass = iclass & ASN1_TFLG_TAG_CLASS;
289     } else {
290         ttag = -1;
291         tclass = 0;
292     }
293     /*
294      * Remove any class mask from iflag.
295      */
296     iclass &= ~ASN1_TFLG_TAG_CLASS;
297 
298     /*
299      * At this point 'ttag' contains the outer tag to use, 'tclass' is the
300      * class and iclass is any flags passed to this function.
301      */
302 
303     /* if template and arguments require ndef, use it */
304     if ((flags & ASN1_TFLG_NDEF) && (iclass & ASN1_TFLG_NDEF))
305         ndef = 2;
306     else
307         ndef = 1;
308 
309     if (flags & ASN1_TFLG_SK_MASK) {
310         /* SET OF, SEQUENCE OF */
311         STACK_OF(ASN1_VALUE) *sk = (STACK_OF(ASN1_VALUE) *)*pval;
312         int isset, sktag, skaclass;
313         int skcontlen, sklen;
314         ASN1_VALUE *skitem;
315 
316         if (!*pval)
317             return 0;
318 
319         if (flags & ASN1_TFLG_SET_OF) {
320             isset = 1;
321             /* 2 means we reorder */
322             if (flags & ASN1_TFLG_SEQUENCE_OF)
323                 isset = 2;
324         } else
325             isset = 0;
326 
327         /*
328          * Work out inner tag value: if EXPLICIT or no tagging use underlying
329          * type.
330          */
331         if ((ttag != -1) && !(flags & ASN1_TFLG_EXPTAG)) {
332             sktag = ttag;
333             skaclass = tclass;
334         } else {
335             skaclass = V_ASN1_UNIVERSAL;
336             if (isset)
337                 sktag = V_ASN1_SET;
338             else
339                 sktag = V_ASN1_SEQUENCE;
340         }
341 
342         /* Determine total length of items */
343         skcontlen = 0;
344         for (i = 0; i < sk_ASN1_VALUE_num(sk); i++) {
345             int tmplen;
346             skitem = sk_ASN1_VALUE_value(sk, i);
347             tmplen = ASN1_item_ex_i2d(&skitem, NULL, ASN1_ITEM_ptr(tt->item),
348                                       -1, iclass);
349             if (tmplen == -1 || (skcontlen > INT_MAX - tmplen))
350                 return -1;
351             skcontlen += tmplen;
352         }
353         sklen = ASN1_object_size(ndef, skcontlen, sktag);
354         if (sklen == -1)
355             return -1;
356         /* If EXPLICIT need length of surrounding tag */
357         if (flags & ASN1_TFLG_EXPTAG)
358             ret = ASN1_object_size(ndef, sklen, ttag);
359         else
360             ret = sklen;
361 
362         if (!out || ret == -1)
363             return ret;
364 
365         /* Now encode this lot... */
366         /* EXPLICIT tag */
367         if (flags & ASN1_TFLG_EXPTAG)
368             ASN1_put_object(out, ndef, sklen, ttag, tclass);
369         /* SET or SEQUENCE and IMPLICIT tag */
370         ASN1_put_object(out, ndef, skcontlen, sktag, skaclass);
371         /* And the stuff itself */
372         asn1_set_seq_out(sk, out, skcontlen, ASN1_ITEM_ptr(tt->item),
373                          isset, iclass);
374         if (ndef == 2) {
375             ASN1_put_eoc(out);
376             if (flags & ASN1_TFLG_EXPTAG)
377                 ASN1_put_eoc(out);
378         }
379 
380         return ret;
381     }
382 
383     if (flags & ASN1_TFLG_EXPTAG) {
384         /* EXPLICIT tagging */
385         /* Find length of tagged item */
386         i = ASN1_item_ex_i2d(pval, NULL, ASN1_ITEM_ptr(tt->item), -1, iclass);
387         if (!i)
388             return 0;
389         /* Find length of EXPLICIT tag */
390         ret = ASN1_object_size(ndef, i, ttag);
391         if (out && ret != -1) {
392             /* Output tag and item */
393             ASN1_put_object(out, ndef, i, ttag, tclass);
394             ASN1_item_ex_i2d(pval, out, ASN1_ITEM_ptr(tt->item), -1, iclass);
395             if (ndef == 2)
396                 ASN1_put_eoc(out);
397         }
398         return ret;
399     }
400 
401     /* Either normal or IMPLICIT tagging: combine class and flags */
402     return ASN1_item_ex_i2d(pval, out, ASN1_ITEM_ptr(tt->item),
403                             ttag, tclass | iclass);
404 
405 }
406 
407 /* Temporary structure used to hold DER encoding of items for SET OF */
408 
409 typedef struct {
410     unsigned char *data;
411     int length;
412     ASN1_VALUE *field;
413 } DER_ENC;
414 
der_cmp(const void * a,const void * b)415 static int der_cmp(const void *a, const void *b)
416 {
417     const DER_ENC *d1 = a, *d2 = b;
418     int cmplen, i;
419     cmplen = (d1->length < d2->length) ? d1->length : d2->length;
420     i = memcmp(d1->data, d2->data, cmplen);
421     if (i)
422         return i;
423     return d1->length - d2->length;
424 }
425 
426 /* Output the content octets of SET OF or SEQUENCE OF */
427 
asn1_set_seq_out(STACK_OF (ASN1_VALUE)* sk,unsigned char ** out,int skcontlen,const ASN1_ITEM * item,int do_sort,int iclass)428 static int asn1_set_seq_out(STACK_OF(ASN1_VALUE) *sk, unsigned char **out,
429                             int skcontlen, const ASN1_ITEM *item,
430                             int do_sort, int iclass)
431 {
432     int i;
433     ASN1_VALUE *skitem;
434     unsigned char *tmpdat = NULL, *p = NULL;
435     DER_ENC *derlst = NULL, *tder;
436     if (do_sort) {
437         /* Don't need to sort less than 2 items */
438         if (sk_ASN1_VALUE_num(sk) < 2)
439             do_sort = 0;
440         else {
441             derlst = OPENSSL_malloc(sk_ASN1_VALUE_num(sk)
442                                     * sizeof(*derlst));
443             if (!derlst)
444                 return 0;
445             tmpdat = OPENSSL_malloc(skcontlen);
446             if (!tmpdat) {
447                 OPENSSL_free(derlst);
448                 return 0;
449             }
450         }
451     }
452     /* If not sorting just output each item */
453     if (!do_sort) {
454         for (i = 0; i < sk_ASN1_VALUE_num(sk); i++) {
455             skitem = sk_ASN1_VALUE_value(sk, i);
456             ASN1_item_ex_i2d(&skitem, out, item, -1, iclass);
457         }
458         return 1;
459     }
460     p = tmpdat;
461 
462     /* Doing sort: build up a list of each member's DER encoding */
463     for (i = 0, tder = derlst; i < sk_ASN1_VALUE_num(sk); i++, tder++) {
464         skitem = sk_ASN1_VALUE_value(sk, i);
465         tder->data = p;
466         tder->length = ASN1_item_ex_i2d(&skitem, &p, item, -1, iclass);
467         tder->field = skitem;
468     }
469 
470     /* Now sort them */
471     qsort(derlst, sk_ASN1_VALUE_num(sk), sizeof(*derlst), der_cmp);
472     /* Output sorted DER encoding */
473     p = *out;
474     for (i = 0, tder = derlst; i < sk_ASN1_VALUE_num(sk); i++, tder++) {
475         memcpy(p, tder->data, tder->length);
476         p += tder->length;
477     }
478     *out = p;
479     /* If do_sort is 2 then reorder the STACK */
480     if (do_sort == 2) {
481         for (i = 0, tder = derlst; i < sk_ASN1_VALUE_num(sk); i++, tder++)
482             (void)sk_ASN1_VALUE_set(sk, i, tder->field);
483     }
484     OPENSSL_free(derlst);
485     OPENSSL_free(tmpdat);
486     return 1;
487 }
488 
asn1_i2d_ex_primitive(ASN1_VALUE ** pval,unsigned char ** out,const ASN1_ITEM * it,int tag,int aclass)489 static int asn1_i2d_ex_primitive(ASN1_VALUE **pval, unsigned char **out,
490                                  const ASN1_ITEM *it, int tag, int aclass)
491 {
492     int len;
493     int utype;
494     int usetag;
495     int ndef = 0;
496 
497     utype = it->utype;
498 
499     /*
500      * Get length of content octets and maybe find out the underlying type.
501      */
502 
503     len = asn1_ex_i2c(pval, NULL, &utype, it);
504 
505     /*
506      * If SEQUENCE, SET or OTHER then header is included in pseudo content
507      * octets so don't include tag+length. We need to check here because the
508      * call to asn1_ex_i2c() could change utype.
509      */
510     if ((utype == V_ASN1_SEQUENCE) || (utype == V_ASN1_SET) ||
511         (utype == V_ASN1_OTHER))
512         usetag = 0;
513     else
514         usetag = 1;
515 
516     /* -1 means omit type */
517 
518     if (len == -1)
519         return 0;
520 
521     /* -2 return is special meaning use ndef */
522     if (len == -2) {
523         ndef = 2;
524         len = 0;
525     }
526 
527     /* If not implicitly tagged get tag from underlying type */
528     if (tag == -1)
529         tag = utype;
530 
531     /* Output tag+length followed by content octets */
532     if (out) {
533         if (usetag)
534             ASN1_put_object(out, ndef, len, tag, aclass);
535         asn1_ex_i2c(pval, *out, &utype, it);
536         if (ndef)
537             ASN1_put_eoc(out);
538         else
539             *out += len;
540     }
541 
542     if (usetag)
543         return ASN1_object_size(ndef, len, tag);
544     return len;
545 }
546 
547 /* Produce content octets from a structure */
548 
asn1_ex_i2c(ASN1_VALUE ** pval,unsigned char * cout,int * putype,const ASN1_ITEM * it)549 int asn1_ex_i2c(ASN1_VALUE **pval, unsigned char *cout, int *putype,
550                 const ASN1_ITEM *it)
551 {
552     ASN1_BOOLEAN *tbool = NULL;
553     ASN1_STRING *strtmp;
554     ASN1_OBJECT *otmp;
555     int utype;
556     const unsigned char *cont;
557     unsigned char c;
558     int len;
559     const ASN1_PRIMITIVE_FUNCS *pf;
560     pf = it->funcs;
561     if (pf && pf->prim_i2c)
562         return pf->prim_i2c(pval, cout, putype, it);
563 
564     /* Should type be omitted? */
565     if ((it->itype != ASN1_ITYPE_PRIMITIVE)
566         || (it->utype != V_ASN1_BOOLEAN)) {
567         if (!*pval)
568             return -1;
569     }
570 
571     if (it->itype == ASN1_ITYPE_MSTRING) {
572         /* If MSTRING type set the underlying type */
573         strtmp = (ASN1_STRING *)*pval;
574         utype = strtmp->type;
575         *putype = utype;
576     } else if (it->utype == V_ASN1_ANY) {
577         /* If ANY set type and pointer to value */
578         ASN1_TYPE *typ;
579         typ = (ASN1_TYPE *)*pval;
580         utype = typ->type;
581         *putype = utype;
582         pval = &typ->value.asn1_value;
583     } else
584         utype = *putype;
585 
586     switch (utype) {
587     case V_ASN1_OBJECT:
588         otmp = (ASN1_OBJECT *)*pval;
589         cont = otmp->data;
590         len = otmp->length;
591         break;
592 
593     case V_ASN1_NULL:
594         cont = NULL;
595         len = 0;
596         break;
597 
598     case V_ASN1_BOOLEAN:
599         tbool = (ASN1_BOOLEAN *)pval;
600         if (*tbool == -1)
601             return -1;
602         if (it->utype != V_ASN1_ANY) {
603             /*
604              * Default handling if value == size field then omit
605              */
606             if (*tbool && (it->size > 0))
607                 return -1;
608             if (!*tbool && !it->size)
609                 return -1;
610         }
611         c = (unsigned char)*tbool;
612         cont = &c;
613         len = 1;
614         break;
615 
616     case V_ASN1_BIT_STRING:
617         return i2c_ASN1_BIT_STRING((ASN1_BIT_STRING *)*pval,
618                                    cout ? &cout : NULL);
619         break;
620 
621     case V_ASN1_INTEGER:
622     case V_ASN1_ENUMERATED:
623         /*
624          * These are all have the same content format as ASN1_INTEGER
625          */
626         return i2c_ASN1_INTEGER((ASN1_INTEGER *)*pval, cout ? &cout : NULL);
627         break;
628 
629     case V_ASN1_OCTET_STRING:
630     case V_ASN1_NUMERICSTRING:
631     case V_ASN1_PRINTABLESTRING:
632     case V_ASN1_T61STRING:
633     case V_ASN1_VIDEOTEXSTRING:
634     case V_ASN1_IA5STRING:
635     case V_ASN1_UTCTIME:
636     case V_ASN1_GENERALIZEDTIME:
637     case V_ASN1_GRAPHICSTRING:
638     case V_ASN1_VISIBLESTRING:
639     case V_ASN1_GENERALSTRING:
640     case V_ASN1_UNIVERSALSTRING:
641     case V_ASN1_BMPSTRING:
642     case V_ASN1_UTF8STRING:
643     case V_ASN1_SEQUENCE:
644     case V_ASN1_SET:
645     default:
646         /* All based on ASN1_STRING and handled the same */
647         strtmp = (ASN1_STRING *)*pval;
648         /* Special handling for NDEF */
649         if ((it->size == ASN1_TFLG_NDEF)
650             && (strtmp->flags & ASN1_STRING_FLAG_NDEF)) {
651             if (cout) {
652                 strtmp->data = cout;
653                 strtmp->length = 0;
654             }
655             /* Special return code */
656             return -2;
657         }
658         cont = strtmp->data;
659         len = strtmp->length;
660 
661         break;
662 
663     }
664     if (cout && len)
665         memcpy(cout, cont, len);
666     return len;
667 }
668