crypto/libressl/crypto/asn1/x_name.c

   1 /* $OpenBSD: x_name.c,v 1.30 2015/07/15 17:41:56 miod Exp $ */
   2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   3  * All rights reserved.
   4  *
   5  * This package is an SSL implementation written
   6  * by Eric Young (eay@cryptsoft.com).
   7  * The implementation was written so as to conform with Netscapes SSL.
   8  *
   9  * This library is free for commercial and non-commercial use as long as
  10  * the following conditions are aheared to.  The following conditions
  11  * apply to all code found in this distribution, be it the RC4, RSA,
  12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  13  * included with this distribution is covered by the same copyright terms
  14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  15  *
  16  * Copyright remains Eric Young's, and as such any Copyright notices in
  17  * the code are not to be removed.
  18  * If this package is used in a product, Eric Young should be given attribution
  19  * as the author of the parts of the library used.
  20  * This can be in the form of a textual message at program startup or
  21  * in documentation (online or textual) provided with the package.
  22  *
  23  * Redistribution and use in source and binary forms, with or without
  24  * modification, are permitted provided that the following conditions
  25  * are met:
  26  * 1. Redistributions of source code must retain the copyright
  27  *    notice, this list of conditions and the following disclaimer.
  28  * 2. Redistributions in binary form must reproduce the above copyright
  29  *    notice, this list of conditions and the following disclaimer in the
  30  *    documentation and/or other materials provided with the distribution.
  31  * 3. All advertising materials mentioning features or use of this software
  32  *    must display the following acknowledgement:
  33  *    "This product includes cryptographic software written by
  34  *     Eric Young (eay@cryptsoft.com)"
  35  *    The word 'cryptographic' can be left out if the rouines from the library
  36  *    being used are not cryptographic related :-).
  37  * 4. If you include any Windows specific code (or a derivative thereof) from
  38  *    the apps directory (application code) you must include an acknowledgement:
  39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  40  *
  41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  51  * SUCH DAMAGE.
  52  *
  53  * The licence and distribution terms for any publically available version or
  54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  55  * copied and put under another distribution licence
  56  * [including the GNU Public Licence.]
  57  */
  58
  59 #include <ctype.h>
  60 #include <stdio.h>
  61 #include <string.h>
  62
  63 #include <openssl/asn1t.h>
  64 #include <openssl/err.h>
  65 #include <openssl/x509.h>
  66
  67 #include "asn1_locl.h"
  68
  69 typedef STACK_OF(X509_NAME_ENTRY) STACK_OF_X509_NAME_ENTRY;
  70 DECLARE_STACK_OF(STACK_OF_X509_NAME_ENTRY)
  71
  72 static int x509_name_ex_d2i(ASN1_VALUE **val, const unsigned char **in,
  73     long len, const ASN1_ITEM *it, int tag, int aclass, char opt,
  74     ASN1_TLC *ctx);
  75
  76 static int x509_name_ex_i2d(ASN1_VALUE **val, unsigned char **out,
  77     const ASN1_ITEM *it, int tag, int aclass);
  78 static int x509_name_ex_new(ASN1_VALUE **val, const ASN1_ITEM *it);
  79 static void x509_name_ex_free(ASN1_VALUE **val, const ASN1_ITEM *it);
  80
  81 static int x509_name_encode(X509_NAME *a);
  82 static int x509_name_canon(X509_NAME *a);
  83 static int asn1_string_canon(ASN1_STRING *out, ASN1_STRING *in);
  84 static int i2d_name_canon(STACK_OF(STACK_OF_X509_NAME_ENTRY) *intname,
  85     unsigned char **in);
  86
  87 static int x509_name_ex_print(BIO *out, ASN1_VALUE **pval, int indent,
  88     const char *fname, const ASN1_PCTX *pctx);
  89
  90 static const ASN1_TEMPLATE X509_NAME_ENTRY_seq_tt[] = {
  91         {
  92                 .offset = offsetof(X509_NAME_ENTRY, object),
  93                 .field_name = "object",
  94                 .item = &ASN1_OBJECT_it,
  95         },
  96         {
  97                 .offset = offsetof(X509_NAME_ENTRY, value),
  98                 .field_name = "value",
  99                 .item = &ASN1_PRINTABLE_it,
 100         },
 101 };
 102
 103 const ASN1_ITEM X509_NAME_ENTRY_it = {
 104         .itype = ASN1_ITYPE_SEQUENCE,
 105         .utype = V_ASN1_SEQUENCE,
 106         .templates = X509_NAME_ENTRY_seq_tt,
 107         .tcount = sizeof(X509_NAME_ENTRY_seq_tt) / sizeof(ASN1_TEMPLATE),
 108         .size = sizeof(X509_NAME_ENTRY),
 109         .sname = "X509_NAME_ENTRY",
 110 };
 111
 112
 113 X509_NAME_ENTRY *
 114 d2i_X509_NAME_ENTRY(X509_NAME_ENTRY **a, const unsigned char **in, long len)
 115 {
 116         return (X509_NAME_ENTRY *)ASN1_item_d2i((ASN1_VALUE **)a, in, len,
 117             &X509_NAME_ENTRY_it);
 118 }
 119
 120 int
 121 i2d_X509_NAME_ENTRY(X509_NAME_ENTRY *a, unsigned char **out)
 122 {
 123         return ASN1_item_i2d((ASN1_VALUE *)a, out, &X509_NAME_ENTRY_it);
 124 }
 125
 126 X509_NAME_ENTRY *
 127 X509_NAME_ENTRY_new(void)
 128 {
 129         return (X509_NAME_ENTRY *)ASN1_item_new(&X509_NAME_ENTRY_it);
 130 }
 131
 132 void
 133 X509_NAME_ENTRY_free(X509_NAME_ENTRY *a)
 134 {
 135         ASN1_item_free((ASN1_VALUE *)a, &X509_NAME_ENTRY_it);
 136 }
 137
 138 X509_NAME_ENTRY *
 139 X509_NAME_ENTRY_dup(X509_NAME_ENTRY *x)
 140 {
 141         return ASN1_item_dup(&X509_NAME_ENTRY_it, x);
 142 }
 143
 144 /* For the "Name" type we need a SEQUENCE OF { SET OF X509_NAME_ENTRY }
 145  * so declare two template wrappers for this
 146  */
 147
 148 static const ASN1_TEMPLATE X509_NAME_ENTRIES_item_tt = {
 149         .flags = ASN1_TFLG_SET_OF,
 150         .tag = 0,
 151         .offset = 0,
 152         .field_name = "RDNS",
 153         .item = &X509_NAME_ENTRY_it,
 154 };
 155
 156 const ASN1_ITEM X509_NAME_ENTRIES_it = {
 157         .itype = ASN1_ITYPE_PRIMITIVE,
 158         .utype = -1,
 159         .templates = &X509_NAME_ENTRIES_item_tt,
 160         .tcount = 0,
 161         .funcs = NULL,
 162         .size = 0,
 163         .sname = "X509_NAME_ENTRIES",
 164 };
 165
 166 static const ASN1_TEMPLATE X509_NAME_INTERNAL_item_tt = {
 167         .flags = ASN1_TFLG_SEQUENCE_OF,
 168         .tag = 0,
 169         .offset = 0,
 170         .field_name = "Name",
 171         .item = &X509_NAME_ENTRIES_it,
 172 };
 173
 174 const ASN1_ITEM X509_NAME_INTERNAL_it = {
 175         .itype = ASN1_ITYPE_PRIMITIVE,
 176         .utype = -1,
 177         .templates = &X509_NAME_INTERNAL_item_tt,
 178         .tcount = 0,
 179         .funcs = NULL,
 180         .size = 0,
 181         .sname = "X509_NAME_INTERNAL",
 182 };
 183
 184 /* Normally that's where it would end: we'd have two nested STACK structures
 185  * representing the ASN1. Unfortunately X509_NAME uses a completely different
 186  * form and caches encodings so we have to process the internal form and convert
 187  * to the external form.
 188  */
 189
 190 const ASN1_EXTERN_FUNCS x509_name_ff = {
 191         NULL,
 192         x509_name_ex_new,
 193         x509_name_ex_free,
 194         0,      /* Default clear behaviour is OK */
 195         x509_name_ex_d2i,
 196         x509_name_ex_i2d,
 197         x509_name_ex_print
 198 };
 199
 200 const ASN1_ITEM X509_NAME_it = {
 201         .itype = ASN1_ITYPE_EXTERN,
 202         .utype = V_ASN1_SEQUENCE,
 203         .templates = NULL,
 204         .tcount = 0,
 205         .funcs = &x509_name_ff,
 206         .size = 0,
 207         .sname = "X509_NAME",
 208 };
 209
 210 X509_NAME *
 211 d2i_X509_NAME(X509_NAME **a, const unsigned char **in, long len)
 212 {
 213         return (X509_NAME *)ASN1_item_d2i((ASN1_VALUE **)a, in, len,
 214             &X509_NAME_it);
 215 }
 216
 217 int
 218 i2d_X509_NAME(X509_NAME *a, unsigned char **out)
 219 {
 220         return ASN1_item_i2d((ASN1_VALUE *)a, out, &X509_NAME_it);
 221 }
 222
 223 X509_NAME *
 224 X509_NAME_new(void)
 225 {
 226         return (X509_NAME *)ASN1_item_new(&X509_NAME_it);
 227 }
 228
 229 void
 230 X509_NAME_free(X509_NAME *a)
 231 {
 232         ASN1_item_free((ASN1_VALUE *)a, &X509_NAME_it);
 233 }
 234
 235 X509_NAME *
 236 X509_NAME_dup(X509_NAME *x)
 237 {
 238         return ASN1_item_dup(&X509_NAME_it, x);
 239 }
 240
 241 static int
 242 x509_name_ex_new(ASN1_VALUE **val, const ASN1_ITEM *it)
 243 {
 244         X509_NAME *ret = NULL;
 245
 246         ret = malloc(sizeof(X509_NAME));
 247         if (!ret)
 248                 goto memerr;
 249         if ((ret->entries = sk_X509_NAME_ENTRY_new_null()) == NULL)
 250                 goto memerr;
 251         if ((ret->bytes = BUF_MEM_new()) == NULL)
 252                 goto memerr;
 253         ret->canon_enc = NULL;
 254         ret->canon_enclen = 0;
 255         ret->modified = 1;
 256         *val = (ASN1_VALUE *)ret;
 257         return 1;
 258
 259 memerr:
 260         ASN1err(ASN1_F_X509_NAME_EX_NEW, ERR_R_MALLOC_FAILURE);
 261         if (ret) {
 262                 if (ret->entries)
 263                         sk_X509_NAME_ENTRY_free(ret->entries);
 264                 free(ret);
 265         }
 266         return 0;
 267 }
 268
 269 static void
 270 x509_name_ex_free(ASN1_VALUE **pval, const ASN1_ITEM *it)
 271 {
 272         X509_NAME *a;
 273
 274         if (!pval || !*pval)
 275                 return;
 276         a = (X509_NAME *)*pval;
 277
 278         BUF_MEM_free(a->bytes);
 279         sk_X509_NAME_ENTRY_pop_free(a->entries, X509_NAME_ENTRY_free);
 280         free(a->canon_enc);
 281         free(a);
 282         *pval = NULL;
 283 }
 284
 285 static int
 286 x509_name_ex_d2i(ASN1_VALUE **val, const unsigned char **in, long len,
 287     const ASN1_ITEM *it, int tag, int aclass, char opt, ASN1_TLC *ctx)
 288 {
 289         const unsigned char *p = *in, *q;
 290         union {
 291                 STACK_OF(STACK_OF_X509_NAME_ENTRY) *s;
 292                 ASN1_VALUE *a;
 293         } intname = {NULL};
 294         union {
 295                 X509_NAME *x;
 296                 ASN1_VALUE *a;
 297         } nm = {NULL};
 298         int i, j, ret;
 299         STACK_OF(X509_NAME_ENTRY) *entries;
 300         X509_NAME_ENTRY *entry;
 301         q = p;
 302
 303         /* Get internal representation of Name */
 304         ret = ASN1_item_ex_d2i(&intname.a, &p, len,
 305             ASN1_ITEM_rptr(X509_NAME_INTERNAL), tag, aclass, opt, ctx);
 306
 307         if (ret <= 0)
 308                 return ret;
 309
 310         if (*val)
 311                 x509_name_ex_free(val, NULL);
 312         if (!x509_name_ex_new(&nm.a, NULL))
 313                 goto err;
 314         /* We've decoded it: now cache encoding */
 315         if (!BUF_MEM_grow(nm.x->bytes, p - q))
 316                 goto err;
 317         memcpy(nm.x->bytes->data, q, p - q);
 318
 319         /* Convert internal representation to X509_NAME structure */
 320         for (i = 0; i < sk_STACK_OF_X509_NAME_ENTRY_num(intname.s); i++) {
 321                 entries = sk_STACK_OF_X509_NAME_ENTRY_value(intname.s, i);
 322                 for (j = 0; j < sk_X509_NAME_ENTRY_num(entries); j++) {
 323                         entry = sk_X509_NAME_ENTRY_value(entries, j);
 324                         entry->set = i;
 325                         if (!sk_X509_NAME_ENTRY_push(nm.x->entries, entry))
 326                                 goto err;
 327                 }
 328                 sk_X509_NAME_ENTRY_free(entries);
 329         }
 330         sk_STACK_OF_X509_NAME_ENTRY_free(intname.s);
 331         ret = x509_name_canon(nm.x);
 332         if (!ret)
 333                 goto err;
 334         nm.x->modified = 0;
 335         *val = nm.a;
 336         *in = p;
 337         return ret;
 338
 339 err:
 340         if (nm.x != NULL)
 341                 X509_NAME_free(nm.x);
 342         ASN1err(ASN1_F_X509_NAME_EX_D2I, ERR_R_NESTED_ASN1_ERROR);
 343         return 0;
 344 }
 345
 346 static int
 347 x509_name_ex_i2d(ASN1_VALUE **val, unsigned char **out, const ASN1_ITEM *it,
 348     int tag, int aclass)
 349 {
 350         int ret;
 351         X509_NAME *a = (X509_NAME *)*val;
 352
 353         if (a->modified) {
 354                 ret = x509_name_encode(a);
 355                 if (ret < 0)
 356                         return ret;
 357                 ret = x509_name_canon(a);
 358                 if (ret < 0)
 359                         return ret;
 360         }
 361         ret = a->bytes->length;
 362         if (out != NULL) {
 363                 memcpy(*out, a->bytes->data, ret);
 364                 *out += ret;
 365         }
 366         return ret;
 367 }
 368
 369 static void
 370 local_sk_X509_NAME_ENTRY_free(STACK_OF(X509_NAME_ENTRY) *ne)
 371 {
 372         sk_X509_NAME_ENTRY_free(ne);
 373 }
 374
 375 static void
 376 local_sk_X509_NAME_ENTRY_pop_free(STACK_OF(X509_NAME_ENTRY) *ne)
 377 {
 378         sk_X509_NAME_ENTRY_pop_free(ne, X509_NAME_ENTRY_free);
 379 }
 380
 381 static int
 382 x509_name_encode(X509_NAME *a)
 383 {
 384         union {
 385                 STACK_OF(STACK_OF_X509_NAME_ENTRY) *s;
 386                 ASN1_VALUE *a;
 387         } intname = {NULL};
 388         int len;
 389         unsigned char *p;
 390         STACK_OF(X509_NAME_ENTRY) *entries = NULL;
 391         X509_NAME_ENTRY *entry;
 392         int i, set = -1;
 393
 394         intname.s = sk_STACK_OF_X509_NAME_ENTRY_new_null();
 395         if (!intname.s)
 396                 goto memerr;
 397         for (i = 0; i < sk_X509_NAME_ENTRY_num(a->entries); i++) {
 398                 entry = sk_X509_NAME_ENTRY_value(a->entries, i);
 399                 if (entry->set != set) {
 400                         entries = sk_X509_NAME_ENTRY_new_null();
 401                         if (!entries)
 402                                 goto memerr;
 403                         if (!sk_STACK_OF_X509_NAME_ENTRY_push(intname.s,
 404                             entries))
 405                                 goto memerr;
 406                         set = entry->set;
 407                 }
 408                 if (entries == NULL /* if entry->set is bogusly -1 */ ||
 409                     !sk_X509_NAME_ENTRY_push(entries, entry))
 410                         goto memerr;
 411         }
 412         len = ASN1_item_ex_i2d(&intname.a, NULL,
 413             ASN1_ITEM_rptr(X509_NAME_INTERNAL), -1, -1);
 414         if (!BUF_MEM_grow(a->bytes, len))
 415                 goto memerr;
 416         p = (unsigned char *)a->bytes->data;
 417         ASN1_item_ex_i2d(&intname.a, &p, ASN1_ITEM_rptr(X509_NAME_INTERNAL),
 418             -1, -1);
 419         sk_STACK_OF_X509_NAME_ENTRY_pop_free(intname.s,
 420             local_sk_X509_NAME_ENTRY_free);
 421         a->modified = 0;
 422         return len;
 423
 424 memerr:
 425         sk_STACK_OF_X509_NAME_ENTRY_pop_free(intname.s,
 426             local_sk_X509_NAME_ENTRY_free);
 427         ASN1err(ASN1_F_X509_NAME_ENCODE, ERR_R_MALLOC_FAILURE);
 428         return -1;
 429 }
 430
 431 static int
 432 x509_name_ex_print(BIO *out, ASN1_VALUE **pval, int indent, const char *fname,
 433     const ASN1_PCTX *pctx)
 434 {
 435         if (X509_NAME_print_ex(out, (X509_NAME *)*pval, indent,
 436             pctx->nm_flags) <= 0)
 437                 return 0;
 438         return 2;
 439 }
 440
 441 /* This function generates the canonical encoding of the Name structure.
 442  * In it all strings are converted to UTF8, leading, trailing and
 443  * multiple spaces collapsed, converted to lower case and the leading
 444  * SEQUENCE header removed.
 445  *
 446  * In future we could also normalize the UTF8 too.
 447  *
 448  * By doing this comparison of Name structures can be rapidly
 449  * performed by just using memcmp() of the canonical encoding.
 450  * By omitting the leading SEQUENCE name constraints of type
 451  * dirName can also be checked with a simple memcmp().
 452  */
 453
 454 static int
 455 x509_name_canon(X509_NAME *a)
 456 {
 457         unsigned char *p;
 458         STACK_OF(STACK_OF_X509_NAME_ENTRY) *intname = NULL;
 459         STACK_OF(X509_NAME_ENTRY) *entries = NULL;
 460         X509_NAME_ENTRY *entry, *tmpentry = NULL;
 461         int i, len, set = -1, ret = 0;
 462
 463         if (a->canon_enc) {
 464                 free(a->canon_enc);
 465                 a->canon_enc = NULL;
 466         }
 467         /* Special case: empty X509_NAME => null encoding */
 468         if (sk_X509_NAME_ENTRY_num(a->entries) == 0) {
 469                 a->canon_enclen = 0;
 470                 return 1;
 471         }
 472         intname = sk_STACK_OF_X509_NAME_ENTRY_new_null();
 473         if (!intname)
 474                 goto err;
 475         for (i = 0; i < sk_X509_NAME_ENTRY_num(a->entries); i++) {
 476                 entry = sk_X509_NAME_ENTRY_value(a->entries, i);
 477                 if (entry->set != set) {
 478                         entries = sk_X509_NAME_ENTRY_new_null();
 479                         if (!entries)
 480                                 goto err;
 481                         if (sk_STACK_OF_X509_NAME_ENTRY_push(intname,
 482                             entries) == 0) {
 483                                 sk_X509_NAME_ENTRY_free(entries);
 484                                 goto err;
 485                         }
 486                         set = entry->set;
 487                 }
 488                 tmpentry = X509_NAME_ENTRY_new();
 489                 if (tmpentry == NULL)
 490                         goto err;
 491                 tmpentry->object = OBJ_dup(entry->object);
 492                 if (tmpentry->object == NULL)
 493                         goto err;
 494                 if (!asn1_string_canon(tmpentry->value, entry->value))
 495                         goto err;
 496                 if (entries == NULL /* if entry->set is bogusly -1 */ ||
 497                     !sk_X509_NAME_ENTRY_push(entries, tmpentry))
 498                         goto err;
 499                 tmpentry = NULL;
 500         }
 501
 502         /* Finally generate encoding */
 503         len = i2d_name_canon(intname, NULL);
 504         if (len < 0)
 505                 goto err;
 506         p = malloc(len);
 507         if (p == NULL)
 508                 goto err;
 509         a->canon_enc = p;
 510         a->canon_enclen = len;
 511         i2d_name_canon(intname, &p);
 512         ret = 1;
 513
 514 err:
 515         if (tmpentry)
 516                 X509_NAME_ENTRY_free(tmpentry);
 517         if (intname)
 518                 sk_STACK_OF_X509_NAME_ENTRY_pop_free(intname,
 519                     local_sk_X509_NAME_ENTRY_pop_free);
 520         return ret;
 521 }
 522
 523 /* Bitmap of all the types of string that will be canonicalized. */
 524
 525 #define ASN1_MASK_CANON \
 526         (B_ASN1_UTF8STRING | B_ASN1_BMPSTRING | B_ASN1_UNIVERSALSTRING \
 527         | B_ASN1_PRINTABLESTRING | B_ASN1_T61STRING | B_ASN1_IA5STRING \
 528         | B_ASN1_VISIBLESTRING)
 529
 530
 531 static int
 532 asn1_string_canon(ASN1_STRING *out, ASN1_STRING *in)
 533 {
 534         unsigned char *to, *from;
 535         int len, i;
 536
 537         /* If type not in bitmask just copy string across */
 538         if (!(ASN1_tag2bit(in->type) & ASN1_MASK_CANON)) {
 539                 if (!ASN1_STRING_copy(out, in))
 540                         return 0;
 541                 return 1;
 542         }
 543
 544         out->type = V_ASN1_UTF8STRING;
 545         out->length = ASN1_STRING_to_UTF8(&out->data, in);
 546         if (out->length == -1)
 547                 return 0;
 548
 549         to = out->data;
 550         from = to;
 551
 552         len = out->length;
 553
 554         /* Convert string in place to canonical form.
 555          * Ultimately we may need to handle a wider range of characters
 556          * but for now ignore anything with MSB set and rely on the
 557          * isspace() and tolower() functions.
 558          */
 559
 560         /* Ignore leading spaces */
 561         while ((len > 0) && !(*from & 0x80) && isspace(*from)) {
 562                 from++;
 563                 len--;
 564         }
 565
 566         to = from + len - 1;
 567
 568         /* Ignore trailing spaces */
 569         while ((len > 0) && !(*to & 0x80) && isspace(*to)) {
 570                 to--;
 571                 len--;
 572         }
 573
 574         to = out->data;
 575
 576         i = 0;
 577         while (i < len) {
 578                 /* If MSB set just copy across */
 579                 if (*from & 0x80) {
 580                         *to++ = *from++;
 581                         i++;
 582                 }
 583                 /* Collapse multiple spaces */
 584                 else if (isspace(*from)) {
 585                         /* Copy one space across */
 586                         *to++ = ' ';
 587                         /* Ignore subsequent spaces. Note: don't need to
 588                          * check len here because we know the last
 589                          * character is a non-space so we can't overflow.
 590                          */
 591                         do {
 592                                 from++;
 593                                 i++;
 594                         } while (!(*from & 0x80) && isspace(*from));
 595                 } else {
 596                         *to++ = tolower(*from);
 597                         from++;
 598                         i++;
 599                 }
 600         }
 601
 602         out->length = to - out->data;
 603
 604         return 1;
 605 }
 606
 607 static int
 608 i2d_name_canon(STACK_OF(STACK_OF_X509_NAME_ENTRY) *_intname, unsigned char **in)
 609 {
 610         int i, len, ltmp;
 611         ASN1_VALUE *v;
 612         STACK_OF(ASN1_VALUE) *intname = (STACK_OF(ASN1_VALUE) *)_intname;
 613
 614         len = 0;
 615         for (i = 0; i < sk_ASN1_VALUE_num(intname); i++) {
 616                 v = sk_ASN1_VALUE_value(intname, i);
 617                 ltmp = ASN1_item_ex_i2d(&v, in,
 618                     ASN1_ITEM_rptr(X509_NAME_ENTRIES), -1, -1);
 619                 if (ltmp < 0)
 620                         return ltmp;
 621                 len += ltmp;
 622         }
 623         return len;
 624 }
 625
 626 int
 627 X509_NAME_set(X509_NAME **xn, X509_NAME *name)
 628 {
 629         X509_NAME *in;
 630
 631         if (!xn || !name)
 632                 return (0);
 633
 634         if (*xn != name) {
 635                 in = X509_NAME_dup(name);
 636                 if (in != NULL) {
 637                         X509_NAME_free(*xn);
 638                         *xn = in;
 639                 }
 640         }
 641         return (*xn != NULL);
 642 }