1/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 2 * All rights reserved. 3 * 4 * This package is an SSL implementation written 5 * by Eric Young (eay@cryptsoft.com). 6 * The implementation was written so as to conform with Netscapes SSL. 7 * 8 * This library is free for commercial and non-commercial use as long as 9 * the following conditions are aheared to. The following conditions 10 * apply to all code found in this distribution, be it the RC4, RSA, 11 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 12 * included with this distribution is covered by the same copyright terms 13 * except that the holder is Tim Hudson (tjh@cryptsoft.com). 14 * 15 * Copyright remains Eric Young's, and as such any Copyright notices in 16 * the code are not to be removed. 17 * If this package is used in a product, Eric Young should be given attribution 18 * as the author of the parts of the library used. 19 * This can be in the form of a textual message at program startup or 20 * in documentation (online or textual) provided with the package. 21 * 22 * Redistribution and use in source and binary forms, with or without 23 * modification, are permitted provided that the following conditions 24 * are met: 25 * 1. Redistributions of source code must retain the copyright 26 * notice, this list of conditions and the following disclaimer. 27 * 2. Redistributions in binary form must reproduce the above copyright 28 * notice, this list of conditions and the following disclaimer in the 29 * documentation and/or other materials provided with the distribution. 30 * 3. All advertising materials mentioning features or use of this software 31 * must display the following acknowledgement: 32 * "This product includes cryptographic software written by 33 * Eric Young (eay@cryptsoft.com)" 34 * The word 'cryptographic' can be left out if the rouines from the library 35 * being used are not cryptographic related :-). 36 * 4. If you include any Windows specific code (or a derivative thereof) from 37 * the apps directory (application code) you must include an acknowledgement: 38 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 39 * 40 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 43 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 50 * SUCH DAMAGE. 51 * 52 * The licence and distribution terms for any publically available version or 53 * derivative of this code cannot be changed. i.e. this code cannot simply be 54 * copied and put under another distribution licence 55 * [including the GNU Public Licence.] */ 56 57#include <openssl/asn1.h> 58 59#include <openssl/asn1t.h> 60#include <openssl/mem.h> 61 62 63static int asn1_i2d_ex_primitive(ASN1_VALUE **pval, unsigned char **out, 64 const ASN1_ITEM *it, 65 int tag, int aclass); 66static int asn1_set_seq_out(STACK_OF(ASN1_VALUE) *sk, unsigned char **out, 67 int skcontlen, const ASN1_ITEM *item, 68 int do_sort, int iclass); 69static int asn1_template_ex_i2d(ASN1_VALUE **pval, unsigned char **out, 70 const ASN1_TEMPLATE *tt, 71 int tag, int aclass); 72static int asn1_item_flags_i2d(ASN1_VALUE *val, unsigned char **out, 73 const ASN1_ITEM *it, int flags); 74 75/* Top level i2d equivalents: the 'ndef' variant instructs the encoder 76 * to use indefinite length constructed encoding, where appropriate 77 */ 78 79int ASN1_item_ndef_i2d(ASN1_VALUE *val, unsigned char **out, 80 const ASN1_ITEM *it) 81 { 82 return asn1_item_flags_i2d(val, out, it, ASN1_TFLG_NDEF); 83 } 84 85int ASN1_item_i2d(ASN1_VALUE *val, unsigned char **out, const ASN1_ITEM *it) 86 { 87 return asn1_item_flags_i2d(val, out, it, 0); 88 } 89 90/* Encode an ASN1 item, this is use by the 91 * standard 'i2d' function. 'out' points to 92 * a buffer to output the data to. 93 * 94 * The new i2d has one additional feature. If the output 95 * buffer is NULL (i.e. *out == NULL) then a buffer is 96 * allocated and populated with the encoding. 97 */ 98 99static int asn1_item_flags_i2d(ASN1_VALUE *val, unsigned char **out, 100 const ASN1_ITEM *it, int flags) 101 { 102 if (out && !*out) 103 { 104 unsigned char *p, *buf; 105 int len; 106 len = ASN1_item_ex_i2d(&val, NULL, it, -1, flags); 107 if (len <= 0) 108 return len; 109 buf = OPENSSL_malloc(len); 110 if (!buf) 111 return -1; 112 p = buf; 113 ASN1_item_ex_i2d(&val, &p, it, -1, flags); 114 *out = buf; 115 return len; 116 } 117 118 return ASN1_item_ex_i2d(&val, out, it, -1, flags); 119 } 120 121/* Encode an item, taking care of IMPLICIT tagging (if any). 122 * This function performs the normal item handling: it can be 123 * used in external types. 124 */ 125 126int ASN1_item_ex_i2d(ASN1_VALUE **pval, unsigned char **out, 127 const ASN1_ITEM *it, int tag, int aclass) 128 { 129 const ASN1_TEMPLATE *tt = NULL; 130 unsigned char *p = NULL; 131 int i, seqcontlen, seqlen, ndef = 1; 132 const ASN1_COMPAT_FUNCS *cf; 133 const ASN1_EXTERN_FUNCS *ef; 134 const ASN1_AUX *aux = it->funcs; 135 ASN1_aux_cb *asn1_cb = 0; 136 137 if ((it->itype != ASN1_ITYPE_PRIMITIVE) && !*pval) 138 return 0; 139 140 if (aux && aux->asn1_cb) 141 asn1_cb = aux->asn1_cb; 142 143 switch(it->itype) 144 { 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 { 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_COMPAT: 180 /* old style hackery... */ 181 cf = it->funcs; 182 if (out) 183 p = *out; 184 i = cf->asn1_i2d(*pval, out); 185 /* Fixup for IMPLICIT tag: note this messes up for tags > 30, 186 * but so did the old code. Tags > 30 are very rare anyway. 187 */ 188 if (out && (tag != -1)) 189 *p = aclass | tag | (*p & V_ASN1_CONSTRUCTED); 190 return i; 191 192 case ASN1_ITYPE_NDEF_SEQUENCE: 193 /* Use indefinite length constructed if requested */ 194 if (aclass & ASN1_TFLG_NDEF) 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 { 210 tag = V_ASN1_SEQUENCE; 211 /* Retain any other flags in aclass */ 212 aclass = (aclass & ~ASN1_TFLG_TAG_CLASS) 213 | V_ASN1_UNIVERSAL; 214 } 215 if (asn1_cb && !asn1_cb(ASN1_OP_I2D_PRE, pval, it, NULL)) 216 return 0; 217 /* First work out sequence content length */ 218 for (i = 0, tt = it->templates; i < it->tcount; tt++, i++) 219 { 220 const ASN1_TEMPLATE *seqtt; 221 ASN1_VALUE **pseqval; 222 seqtt = asn1_do_adb(pval, tt, 1); 223 if (!seqtt) 224 return 0; 225 pseqval = asn1_get_field_ptr(pval, seqtt); 226 /* FIXME: check for errors in enhanced version */ 227 seqcontlen += asn1_template_ex_i2d(pseqval, NULL, seqtt, 228 -1, aclass); 229 } 230 231 seqlen = ASN1_object_size(ndef, seqcontlen, tag); 232 if (!out) 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 { 238 const ASN1_TEMPLATE *seqtt; 239 ASN1_VALUE **pseqval; 240 seqtt = asn1_do_adb(pval, tt, 1); 241 if (!seqtt) 242 return 0; 243 pseqval = asn1_get_field_ptr(pval, seqtt); 244 /* FIXME: check for errors in enhanced version */ 245 asn1_template_ex_i2d(pseqval, out, seqtt, -1, aclass); 246 } 247 if (ndef == 2) 248 ASN1_put_eoc(out); 249 if (asn1_cb && !asn1_cb(ASN1_OP_I2D_POST, pval, it, NULL)) 250 return 0; 251 return seqlen; 252 253 default: 254 return 0; 255 256 } 257 return 0; 258 } 259 260int ASN1_template_i2d(ASN1_VALUE **pval, unsigned char **out, 261 const ASN1_TEMPLATE *tt) 262 { 263 return asn1_template_ex_i2d(pval, out, tt, -1, 0); 264 } 265 266static int asn1_template_ex_i2d(ASN1_VALUE **pval, unsigned char **out, 267 const ASN1_TEMPLATE *tt, int tag, int iclass) 268 { 269 int i, ret, flags, ttag, tclass, ndef; 270 size_t j; 271 flags = tt->flags; 272 /* Work out tag and class to use: tagging may come 273 * either from the template or the arguments, not both 274 * because this would create ambiguity. Additionally 275 * the iclass argument may contain some additional flags 276 * which should be noted and passed down to other levels. 277 */ 278 if (flags & ASN1_TFLG_TAG_MASK) 279 { 280 /* Error if argument and template tagging */ 281 if (tag != -1) 282 /* FIXME: error code here */ 283 return -1; 284 /* Get tagging from template */ 285 ttag = tt->tag; 286 tclass = flags & ASN1_TFLG_TAG_CLASS; 287 } 288 else if (tag != -1) 289 { 290 /* No template tagging, get from arguments */ 291 ttag = tag; 292 tclass = iclass & ASN1_TFLG_TAG_CLASS; 293 } 294 else 295 { 296 ttag = -1; 297 tclass = 0; 298 } 299 /* 300 * Remove any class mask from iflag. 301 */ 302 iclass &= ~ASN1_TFLG_TAG_CLASS; 303 304 /* At this point 'ttag' contains the outer tag to use, 305 * 'tclass' is the class and iclass is any flags passed 306 * to this function. 307 */ 308 309 /* if template and arguments require ndef, use it */ 310 if ((flags & ASN1_TFLG_NDEF) && (iclass & ASN1_TFLG_NDEF)) 311 ndef = 2; 312 else ndef = 1; 313 314 if (flags & ASN1_TFLG_SK_MASK) 315 { 316 /* SET OF, SEQUENCE OF */ 317 STACK_OF(ASN1_VALUE) *sk = (STACK_OF(ASN1_VALUE) *)*pval; 318 int isset, sktag, skaclass; 319 int skcontlen, sklen; 320 ASN1_VALUE *skitem; 321 322 if (!*pval) 323 return 0; 324 325 if (flags & ASN1_TFLG_SET_OF) 326 { 327 isset = 1; 328 /* 2 means we reorder */ 329 if (flags & ASN1_TFLG_SEQUENCE_OF) 330 isset = 2; 331 } 332 else isset = 0; 333 334 /* Work out inner tag value: if EXPLICIT 335 * or no tagging use underlying type. 336 */ 337 if ((ttag != -1) && !(flags & ASN1_TFLG_EXPTAG)) 338 { 339 sktag = ttag; 340 skaclass = tclass; 341 } 342 else 343 { 344 skaclass = V_ASN1_UNIVERSAL; 345 if (isset) 346 sktag = V_ASN1_SET; 347 else sktag = V_ASN1_SEQUENCE; 348 } 349 350 /* Determine total length of items */ 351 skcontlen = 0; 352 for (j = 0; j < sk_ASN1_VALUE_num(sk); j++) 353 { 354 skitem = sk_ASN1_VALUE_value(sk, j); 355 skcontlen += ASN1_item_ex_i2d(&skitem, NULL, 356 ASN1_ITEM_ptr(tt->item), 357 -1, iclass); 358 } 359 sklen = ASN1_object_size(ndef, skcontlen, sktag); 360 /* If EXPLICIT need length of surrounding tag */ 361 if (flags & ASN1_TFLG_EXPTAG) 362 ret = ASN1_object_size(ndef, sklen, ttag); 363 else ret = sklen; 364 365 if (!out) 366 return ret; 367 368 /* Now encode this lot... */ 369 /* EXPLICIT tag */ 370 if (flags & ASN1_TFLG_EXPTAG) 371 ASN1_put_object(out, ndef, sklen, ttag, tclass); 372 /* SET or SEQUENCE and IMPLICIT tag */ 373 ASN1_put_object(out, ndef, skcontlen, sktag, skaclass); 374 /* And the stuff itself */ 375 asn1_set_seq_out(sk, out, skcontlen, ASN1_ITEM_ptr(tt->item), 376 isset, iclass); 377 if (ndef == 2) 378 { 379 ASN1_put_eoc(out); 380 if (flags & ASN1_TFLG_EXPTAG) 381 ASN1_put_eoc(out); 382 } 383 384 return ret; 385 } 386 387 if (flags & ASN1_TFLG_EXPTAG) 388 { 389 /* EXPLICIT tagging */ 390 /* Find length of tagged item */ 391 i = ASN1_item_ex_i2d(pval, NULL, ASN1_ITEM_ptr(tt->item), 392 -1, iclass); 393 if (!i) 394 return 0; 395 /* Find length of EXPLICIT tag */ 396 ret = ASN1_object_size(ndef, i, ttag); 397 if (out) 398 { 399 /* Output tag and item */ 400 ASN1_put_object(out, ndef, i, ttag, tclass); 401 ASN1_item_ex_i2d(pval, out, ASN1_ITEM_ptr(tt->item), 402 -1, iclass); 403 if (ndef == 2) 404 ASN1_put_eoc(out); 405 } 406 return ret; 407 } 408 409 /* Either normal or IMPLICIT tagging: combine class and flags */ 410 return ASN1_item_ex_i2d(pval, out, ASN1_ITEM_ptr(tt->item), 411 ttag, tclass | iclass); 412 413} 414 415/* Temporary structure used to hold DER encoding of items for SET OF */ 416 417typedef struct { 418 unsigned char *data; 419 int length; 420 ASN1_VALUE *field; 421} DER_ENC; 422 423static int der_cmp(const void *a, const void *b) 424 { 425 const DER_ENC *d1 = a, *d2 = b; 426 int cmplen, i; 427 cmplen = (d1->length < d2->length) ? d1->length : d2->length; 428 i = memcmp(d1->data, d2->data, cmplen); 429 if (i) 430 return i; 431 return d1->length - d2->length; 432 } 433 434/* Output the content octets of SET OF or SEQUENCE OF */ 435 436static int asn1_set_seq_out(STACK_OF(ASN1_VALUE) *sk, unsigned char **out, 437 int skcontlen, const ASN1_ITEM *item, 438 int do_sort, int iclass) 439 { 440 size_t i; 441 ASN1_VALUE *skitem; 442 unsigned char *tmpdat = NULL, *p = NULL; 443 DER_ENC *derlst = NULL, *tder; 444 if (do_sort) 445 { 446 /* Don't need to sort less than 2 items */ 447 if (sk_ASN1_VALUE_num(sk) < 2) 448 do_sort = 0; 449 else 450 { 451 derlst = OPENSSL_malloc(sk_ASN1_VALUE_num(sk) 452 * sizeof(*derlst)); 453 if (!derlst) 454 return 0; 455 tmpdat = OPENSSL_malloc(skcontlen); 456 if (!tmpdat) 457 { 458 OPENSSL_free(derlst); 459 return 0; 460 } 461 } 462 } 463 /* If not sorting just output each item */ 464 if (!do_sort) 465 { 466 for (i = 0; i < sk_ASN1_VALUE_num(sk); i++) 467 { 468 skitem = sk_ASN1_VALUE_value(sk, i); 469 ASN1_item_ex_i2d(&skitem, out, item, -1, iclass); 470 } 471 return 1; 472 } 473 p = tmpdat; 474 475 /* Doing sort: build up a list of each member's DER encoding */ 476 for (i = 0, tder = derlst; i < sk_ASN1_VALUE_num(sk); i++, tder++) 477 { 478 skitem = sk_ASN1_VALUE_value(sk, i); 479 tder->data = p; 480 tder->length = ASN1_item_ex_i2d(&skitem, &p, item, -1, iclass); 481 tder->field = skitem; 482 } 483 484 /* Now sort them */ 485 qsort(derlst, sk_ASN1_VALUE_num(sk), sizeof(*derlst), der_cmp); 486 /* Output sorted DER encoding */ 487 p = *out; 488 for (i = 0, tder = derlst; i < sk_ASN1_VALUE_num(sk); i++, tder++) 489 { 490 memcpy(p, tder->data, tder->length); 491 p += tder->length; 492 } 493 *out = p; 494 /* If do_sort is 2 then reorder the STACK */ 495 if (do_sort == 2) 496 { 497 for (i = 0, tder = derlst; i < sk_ASN1_VALUE_num(sk); 498 i++, tder++) 499 (void)sk_ASN1_VALUE_set(sk, i, tder->field); 500 } 501 OPENSSL_free(derlst); 502 OPENSSL_free(tmpdat); 503 return 1; 504 } 505 506static int asn1_i2d_ex_primitive(ASN1_VALUE **pval, unsigned char **out, 507 const ASN1_ITEM *it, int tag, int aclass) 508 { 509 int len; 510 int utype; 511 int usetag; 512 int ndef = 0; 513 514 utype = it->utype; 515 516 /* Get length of content octets and maybe find 517 * out the underlying type. 518 */ 519 520 len = asn1_ex_i2c(pval, NULL, &utype, it); 521 522 /* If SEQUENCE, SET or OTHER then header is 523 * included in pseudo content octets so don't 524 * include tag+length. We need to check here 525 * because the call to asn1_ex_i2c() could change 526 * utype. 527 */ 528 if ((utype == V_ASN1_SEQUENCE) || (utype == V_ASN1_SET) || 529 (utype == V_ASN1_OTHER)) 530 usetag = 0; 531 else usetag = 1; 532 533 /* -1 means omit type */ 534 535 if (len == -1) 536 return 0; 537 538 /* -2 return is special meaning use ndef */ 539 if (len == -2) 540 { 541 ndef = 2; 542 len = 0; 543 } 544 545 /* If not implicitly tagged get tag from underlying type */ 546 if (tag == -1) tag = utype; 547 548 /* Output tag+length followed by content octets */ 549 if (out) 550 { 551 if (usetag) 552 ASN1_put_object(out, ndef, len, tag, aclass); 553 asn1_ex_i2c(pval, *out, &utype, it); 554 if (ndef) 555 ASN1_put_eoc(out); 556 else 557 *out += len; 558 } 559 560 if (usetag) 561 return ASN1_object_size(ndef, len, tag); 562 return len; 563 } 564 565/* Produce content octets from a structure */ 566 567int asn1_ex_i2c(ASN1_VALUE **pval, unsigned char *cout, int *putype, 568 const ASN1_ITEM *it) 569 { 570 ASN1_BOOLEAN *tbool = NULL; 571 ASN1_STRING *strtmp; 572 ASN1_OBJECT *otmp; 573 int utype; 574 const unsigned char *cont; 575 unsigned char c; 576 int len; 577 const ASN1_PRIMITIVE_FUNCS *pf; 578 pf = it->funcs; 579 if (pf && pf->prim_i2c) 580 return pf->prim_i2c(pval, cout, putype, it); 581 582 /* Should type be omitted? */ 583 if ((it->itype != ASN1_ITYPE_PRIMITIVE) 584 || (it->utype != V_ASN1_BOOLEAN)) 585 { 586 if (!*pval) return -1; 587 } 588 589 if (it->itype == ASN1_ITYPE_MSTRING) 590 { 591 /* If MSTRING type set the underlying type */ 592 strtmp = (ASN1_STRING *)*pval; 593 utype = strtmp->type; 594 *putype = utype; 595 } 596 else if (it->utype == V_ASN1_ANY) 597 { 598 /* If ANY set type and pointer to value */ 599 ASN1_TYPE *typ; 600 typ = (ASN1_TYPE *)*pval; 601 utype = typ->type; 602 *putype = utype; 603 pval = &typ->value.asn1_value; 604 } 605 else utype = *putype; 606 607 switch(utype) 608 { 609 case V_ASN1_OBJECT: 610 otmp = (ASN1_OBJECT *)*pval; 611 cont = otmp->data; 612 len = otmp->length; 613 break; 614 615 case V_ASN1_NULL: 616 cont = NULL; 617 len = 0; 618 break; 619 620 case V_ASN1_BOOLEAN: 621 tbool = (ASN1_BOOLEAN *)pval; 622 if (*tbool == -1) 623 return -1; 624 if (it->utype != V_ASN1_ANY) 625 { 626 /* Default handling if value == size field then omit */ 627 if (*tbool && (it->size > 0)) 628 return -1; 629 if (!*tbool && !it->size) 630 return -1; 631 } 632 c = (unsigned char)*tbool; 633 cont = &c; 634 len = 1; 635 break; 636 637 case V_ASN1_BIT_STRING: 638 return i2c_ASN1_BIT_STRING((ASN1_BIT_STRING *)*pval, 639 cout ? &cout : NULL); 640 break; 641 642 case V_ASN1_INTEGER: 643 case V_ASN1_NEG_INTEGER: 644 case V_ASN1_ENUMERATED: 645 case V_ASN1_NEG_ENUMERATED: 646 /* These are all have the same content format 647 * as ASN1_INTEGER 648 */ 649 return i2c_ASN1_INTEGER((ASN1_INTEGER *)*pval, 650 cout ? &cout : NULL); 651 break; 652 653 case V_ASN1_OCTET_STRING: 654 case V_ASN1_NUMERICSTRING: 655 case V_ASN1_PRINTABLESTRING: 656 case V_ASN1_T61STRING: 657 case V_ASN1_VIDEOTEXSTRING: 658 case V_ASN1_IA5STRING: 659 case V_ASN1_UTCTIME: 660 case V_ASN1_GENERALIZEDTIME: 661 case V_ASN1_GRAPHICSTRING: 662 case V_ASN1_VISIBLESTRING: 663 case V_ASN1_GENERALSTRING: 664 case V_ASN1_UNIVERSALSTRING: 665 case V_ASN1_BMPSTRING: 666 case V_ASN1_UTF8STRING: 667 case V_ASN1_SEQUENCE: 668 case V_ASN1_SET: 669 default: 670 /* All based on ASN1_STRING and handled the same */ 671 strtmp = (ASN1_STRING *)*pval; 672 /* Special handling for NDEF */ 673 if ((it->size == ASN1_TFLG_NDEF) 674 && (strtmp->flags & ASN1_STRING_FLAG_NDEF)) 675 { 676 if (cout) 677 { 678 strtmp->data = cout; 679 strtmp->length = 0; 680 } 681 /* Special return code */ 682 return -2; 683 } 684 cont = strtmp->data; 685 len = strtmp->length; 686 687 break; 688 689 } 690 if (cout && len) 691 memcpy(cout, cont, len); 692 return len; 693 } 694