crypto/asn1/tasn_prn.c

   1 /* tasn_prn.c */
   2 /* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
   3  * project 2000.
   4  */
   5 /* ====================================================================
   6  * Copyright (c) 2000,2005 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
  60 #include <stddef.h>
  61 #include <openssl/asn1.h>
  62 #include <openssl/asn1t.h>
  63 #include <openssl/objects.h>
  64 #include <openssl/buffer.h>
  65 #include <openssl/err.h>
  66 #include <openssl/x509v3.h>
  67 #include "asn1_locl.h"
  68
  69 #include <string.h>
  70
  71 /* Print routines.
  72  */
  73
  74 /* ASN1_PCTX routines */
  75
  76 ASN1_PCTX default_pctx =
  77         {
  78         ASN1_PCTX_FLAGS_SHOW_ABSENT,    /* flags */
  79         0,      /* nm_flags */
  80         0,      /* cert_flags */
  81         0,      /* oid_flags */
  82         0       /* str_flags */
  83         };
  84
  85
  86 ASN1_PCTX *ASN1_PCTX_new(void)
  87         {
  88         ASN1_PCTX *ret;
  89         ret = OPENSSL_malloc(sizeof(ASN1_PCTX));
  90         if (ret == NULL)
  91                 {
  92                 ASN1err(ASN1_F_ASN1_PCTX_NEW, ERR_R_MALLOC_FAILURE);
  93                 return NULL;
  94                 }
  95         ret->flags = 0;
  96         ret->nm_flags = 0;
  97         ret->cert_flags = 0;
  98         ret->oid_flags = 0;
  99         ret->str_flags = 0;
 100         return ret;
 101         }
 102
 103 void ASN1_PCTX_free(ASN1_PCTX *p)
 104         {
 105         OPENSSL_free(p);
 106         }
 107
 108 unsigned long ASN1_PCTX_get_flags(ASN1_PCTX *p)
 109         {
 110         return p->flags;
 111         }
 112
 113 void ASN1_PCTX_set_flags(ASN1_PCTX *p, unsigned long flags)
 114         {
 115         p->flags = flags;
 116         }
 117
 118 unsigned long ASN1_PCTX_get_nm_flags(ASN1_PCTX *p)
 119         {
 120         return p->nm_flags;
 121         }
 122
 123 void ASN1_PCTX_set_nm_flags(ASN1_PCTX *p, unsigned long flags)
 124         {
 125         p->nm_flags = flags;
 126         }
 127
 128 unsigned long ASN1_PCTX_get_cert_flags(ASN1_PCTX *p)
 129         {
 130         return p->cert_flags;
 131         }
 132
 133 void ASN1_PCTX_set_cert_flags(ASN1_PCTX *p, unsigned long flags)
 134         {
 135         p->cert_flags = flags;
 136         }
 137
 138 unsigned long ASN1_PCTX_get_oid_flags(ASN1_PCTX *p)
 139         {
 140         return p->oid_flags;
 141         }
 142
 143 void ASN1_PCTX_set_oid_flags(ASN1_PCTX *p, unsigned long flags)
 144         {
 145         p->oid_flags = flags;
 146         }
 147
 148 unsigned long ASN1_PCTX_get_str_flags(ASN1_PCTX *p)
 149         {
 150         return p->str_flags;
 151         }
 152
 153 void ASN1_PCTX_set_str_flags(ASN1_PCTX *p, unsigned long flags)
 154         {
 155         p->str_flags = flags;
 156         }
 157
 158 /* Main print routines */
 159
 160 static int asn1_item_print_ctx(BIO *out, ASN1_VALUE **fld, int indent,
 161                                 const ASN1_ITEM *it,
 162                                 const char *fname, const char *sname,
 163                                 int nohdr, const ASN1_PCTX *pctx);
 164
 165 int asn1_template_print_ctx(BIO *out, ASN1_VALUE **fld, int indent,
 166                                 const ASN1_TEMPLATE *tt, const ASN1_PCTX *pctx);
 167
 168 static int asn1_primitive_print(BIO *out, ASN1_VALUE **fld,
 169                                 const ASN1_ITEM *it, int indent,
 170                                 const char *fname, const char *sname,
 171                                 const ASN1_PCTX *pctx);
 172
 173 static int asn1_print_fsname(BIO *out, int indent,
 174                         const char *fname, const char *sname,
 175                         const ASN1_PCTX *pctx);
 176
 177 int ASN1_item_print(BIO *out, ASN1_VALUE *ifld, int indent,
 178                                 const ASN1_ITEM *it, const ASN1_PCTX *pctx)
 179         {
 180         const char *sname;
 181         if (pctx == NULL)
 182                 pctx = &default_pctx;
 183         if (pctx->flags & ASN1_PCTX_FLAGS_NO_STRUCT_NAME)
 184                 sname = NULL;
 185         else
 186                 sname = it->sname;
 187         return asn1_item_print_ctx(out, &ifld, indent, it,
 188                                                         NULL, sname, 0, pctx);
 189         }
 190
 191 static int asn1_item_print_ctx(BIO *out, ASN1_VALUE **fld, int indent,
 192                                 const ASN1_ITEM *it,
 193                                 const char *fname, const char *sname,
 194                                 int nohdr, const ASN1_PCTX *pctx)
 195         {
 196         const ASN1_TEMPLATE *tt;
 197         const ASN1_EXTERN_FUNCS *ef;
 198         ASN1_VALUE **tmpfld;
 199         int i;
 200         if(*fld == NULL)
 201                 {
 202                 if (pctx->flags & ASN1_PCTX_FLAGS_SHOW_ABSENT)
 203                         {
 204                         if (!nohdr && !asn1_print_fsname(out, indent, fname, sname, pctx))
 205                                 return 0;
 206                         if (BIO_puts(out, "<ABSENT>\n") <= 0)
 207                                 return 0;
 208                         }
 209                 return 1;
 210                 }
 211
 212         switch(it->itype)
 213                 {
 214                 case ASN1_ITYPE_PRIMITIVE:
 215                 if(it->templates)
 216                         {
 217                         if (!asn1_template_print_ctx(out, fld, indent,
 218                                                         it->templates, pctx))
 219                                 return 0;
 220                         }
 221                 /* fall thru */
 222                 case ASN1_ITYPE_MSTRING:
 223                 if (!asn1_primitive_print(out, fld, it,
 224                                 indent, fname, sname,pctx))
 225                         return 0;
 226                 break;
 227
 228                 case ASN1_ITYPE_EXTERN:
 229                 if (!nohdr && !asn1_print_fsname(out, indent, fname, sname, pctx))
 230                         return 0;
 231                 /* Use new style print routine if possible */
 232                 ef = it->funcs;
 233                 if (ef && ef->asn1_ex_print)
 234                         {
 235                         i = ef->asn1_ex_print(out, fld, indent, "", pctx);
 236                         if (!i)
 237                                 return 0;
 238                         if ((i == 2) && (BIO_puts(out, "\n") <= 0))
 239                                 return 0;
 240                         return 1;
 241                         }
 242                 else if (sname &&
 243                         BIO_printf(out, ":EXTERNAL TYPE %s\n", sname) <= 0)
 244                         return 0;
 245                 break;
 246
 247                 case ASN1_ITYPE_CHOICE:
 248 #if 0
 249                 if (!nohdr && !asn1_print_fsname(out, indent, fname, sname, pctx))
 250                         return 0;
 251 #endif
 252                 /* CHOICE type, get selector */
 253                 i = asn1_get_choice_selector(fld, it);
 254                 /* This should never happen... */
 255                 if((i < 0) || (i >= it->tcount))
 256                         {
 257                         if (BIO_printf(out,
 258                                 "ERROR: selector [%d] invalid\n", i) <= 0)
 259                                 return 0;
 260                         return 1;
 261                         }
 262                 tt = it->templates + i;
 263                 tmpfld = asn1_get_field_ptr(fld, tt);
 264                 if (!asn1_template_print_ctx(out, tmpfld, indent, tt, pctx))
 265                         return 0;
 266                 break;
 267
 268                 case ASN1_ITYPE_SEQUENCE:
 269                 case ASN1_ITYPE_NDEF_SEQUENCE:
 270                 if (!nohdr && !asn1_print_fsname(out, indent, fname, sname, pctx))
 271                         return 0;
 272                 if (fname || sname)
 273                         {
 274                         if (pctx->flags & ASN1_PCTX_FLAGS_SHOW_SEQUENCE)
 275                                 {
 276                                 if (BIO_puts(out, " {\n") <= 0)
 277                                         return 0;
 278                                 }
 279                         else
 280                                 {
 281                                 if (BIO_puts(out, "\n") <= 0)
 282                                         return 0;
 283                                 }
 284                         }
 285
 286                 /* Print each field entry */
 287                 for(i = 0, tt = it->templates; i < it->tcount; i++, tt++)
 288                         {
 289                         const ASN1_TEMPLATE *seqtt;
 290                         seqtt = asn1_do_adb(fld, tt, 1);
 291                         tmpfld = asn1_get_field_ptr(fld, seqtt);
 292                         if (!asn1_template_print_ctx(out, tmpfld,
 293                                                 indent + 2, seqtt, pctx))
 294                                 return 0;
 295                         }
 296                 if (pctx->flags & ASN1_PCTX_FLAGS_SHOW_SEQUENCE)
 297                         {
 298                         if (BIO_printf(out, "%*s}\n", indent, "") < 0)
 299                                 return 0;
 300                         }
 301                 break;
 302
 303                 default:
 304                 BIO_printf(out, "Unprocessed type %d\n", it->itype);
 305                 return 0;
 306                 }
 307
 308         return 1;
 309         }
 310
 311 int asn1_template_print_ctx(BIO *out, ASN1_VALUE **fld, int indent,
 312                                 const ASN1_TEMPLATE *tt, const ASN1_PCTX *pctx)
 313         {
 314         int i, flags;
 315         const char *sname, *fname;
 316         flags = tt->flags;
 317         if(pctx->flags & ASN1_PCTX_FLAGS_SHOW_FIELD_STRUCT_NAME)
 318                 sname = tt->item->sname;
 319         else
 320                 sname = NULL;
 321         if(pctx->flags & ASN1_PCTX_FLAGS_NO_FIELD_NAME)
 322                 fname = NULL;
 323         else
 324                 fname = tt->field_name;
 325         if(flags & ASN1_TFLG_SK_MASK)
 326                 {
 327                 char *tname;
 328                 ASN1_VALUE *skitem;
 329                 /* SET OF, SEQUENCE OF */
 330                 if (fname)
 331                         {
 332                         if(pctx->flags & ASN1_PCTX_FLAGS_SHOW_SSOF)
 333                                 {
 334                                 if(flags & ASN1_TFLG_SET_OF)
 335                                         tname = "SET";
 336                                 else
 337                                         tname = "SEQUENCE";
 338                                 if (BIO_printf(out, "%*s%s OF %s {\n",
 339                                         indent, "", tname, tt->field_name) <= 0)
 340                                         return 0;
 341                                 }
 342                         else if (BIO_printf(out, "%*s%s:\n", indent, "",
 343                                         fname) <= 0)
 344                                 return 0;
 345                         }
 346                 for(i = 0; i < sk_num((STACK *)*fld); i++)
 347                         {
 348                         if ((i > 0) && (BIO_puts(out, "\n") <= 0))
 349                                 return 0;
 350
 351                         skitem = (ASN1_VALUE *)sk_value((STACK *)*fld, i);
 352                         if (!asn1_item_print_ctx(out, &skitem, indent + 2,
 353                                         tt->item, NULL, NULL, 1, pctx))
 354                                 return 0;
 355                         }
 356                 if (!i && BIO_printf(out, "%*s<EMPTY>\n", indent + 2, "") <= 0)
 357                                 return 0;
 358                 if(pctx->flags & ASN1_PCTX_FLAGS_SHOW_SEQUENCE)
 359                         {
 360                         if (BIO_printf(out, "%*s}\n", indent, "") <= 0)
 361                                 return 0;
 362                         }
 363                 return 1;
 364                 }
 365         return asn1_item_print_ctx(out, fld, indent, tt->item,
 366                                                         fname, sname, 0, pctx);
 367         }
 368
 369 static int asn1_print_fsname(BIO *out, int indent,
 370                         const char *fname, const char *sname,
 371                         const ASN1_PCTX *pctx)
 372         {
 373         static char spaces[] = "                    ";
 374         const int nspaces = sizeof(spaces) - 1;
 375
 376 #if 0
 377         if (!sname && !fname)
 378                 return 1;
 379 #endif
 380
 381         while (indent > nspaces)
 382                 {
 383                 if (BIO_write(out, spaces, nspaces) != nspaces)
 384                         return 0;
 385                 indent -= nspaces;
 386                 }
 387         if (BIO_write(out, spaces, indent) != indent)
 388                 return 0;
 389         if (pctx->flags & ASN1_PCTX_FLAGS_NO_STRUCT_NAME)
 390                 sname = NULL;
 391         if (pctx->flags & ASN1_PCTX_FLAGS_NO_FIELD_NAME)
 392                 fname = NULL;
 393         if (!sname && !fname)
 394                 return 1;
 395         if (fname)
 396                 {
 397                 if (BIO_puts(out, fname) <= 0)
 398                         return 0;
 399                 }
 400         if (sname)
 401                 {
 402                 if (fname)
 403                         {
 404                         if (BIO_printf(out, " (%s)", sname) <= 0)
 405                                 return 0;
 406                         }
 407                 else
 408                         {
 409                         if (BIO_puts(out, sname) <= 0)
 410                                 return 0;
 411                         }
 412                 }
 413         if (BIO_write(out, ": ", 2) != 2)
 414                 return 0;
 415         return 1;
 416         }
 417
 418 static int asn1_print_boolean_ctx(BIO *out, const int bool,
 419                                                         const ASN1_PCTX *pctx)
 420         {
 421         const char *str;
 422         switch (bool)
 423                 {
 424                 case -1:
 425                 str = "BOOL ABSENT";
 426                 break;
 427
 428                 case 0:
 429                 str = "FALSE";
 430                 break;
 431
 432                 default:
 433                 str = "TRUE";
 434                 break;
 435
 436                 }
 437
 438         if (BIO_puts(out, str) <= 0)
 439                 return 0;
 440         return 1;
 441
 442         }
 443
 444 static int asn1_print_integer_ctx(BIO *out, ASN1_INTEGER *str,
 445                                                 const ASN1_PCTX *pctx)
 446         {
 447         char *s;
 448         int ret = 1;
 449         s = i2s_ASN1_INTEGER(NULL, str);
 450         if (BIO_puts(out, s) <= 0)
 451                 ret = 0;
 452         OPENSSL_free(s);
 453         return ret;
 454         }
 455
 456 static int asn1_print_oid_ctx(BIO *out, const ASN1_OBJECT *oid,
 457                                                 const ASN1_PCTX *pctx)
 458         {
 459         char objbuf[80];
 460         const char *ln;
 461         ln = OBJ_nid2ln(OBJ_obj2nid(oid));
 462         if(!ln)
 463                 ln = "";
 464         OBJ_obj2txt(objbuf, sizeof objbuf, oid, 1);
 465         if (BIO_printf(out, "%s (%s)", ln, objbuf) <= 0)
 466                 return 0;
 467         return 1;
 468         }
 469
 470 static int asn1_print_obstring_ctx(BIO *out, ASN1_STRING *str, int indent,
 471                                                 const ASN1_PCTX *pctx)
 472         {
 473         if (str->type == V_ASN1_BIT_STRING)
 474                 {
 475                 if (BIO_printf(out, " (%ld unused bits)\n",
 476                                         str->flags & 0x7) <= 0)
 477                                 return 0;
 478                 }
 479         else if (BIO_puts(out, "\n") <= 0)
 480                 return 0;
 481         if (BIO_dump_indent(out, (char *)str->data, str->length,
 482                                 indent + 2) <= 0)
 483                 return 0;
 484         return 1;
 485         }
 486
 487 static int asn1_primitive_print(BIO *out, ASN1_VALUE **fld,
 488                                 const ASN1_ITEM *it, int indent,
 489                                 const char *fname, const char *sname,
 490                                 const ASN1_PCTX *pctx)
 491         {
 492         long utype;
 493         ASN1_STRING *str;
 494         int ret = 1, needlf = 1;
 495         const char *pname;
 496         if (!asn1_print_fsname(out, indent, fname, sname, pctx))
 497                         return 0;
 498         str = (ASN1_STRING *)*fld;
 499         if (it->itype == ASN1_ITYPE_MSTRING)
 500                 utype = str->type & ~V_ASN1_NEG;
 501         else
 502                 utype = it->utype;
 503         if (utype == V_ASN1_ANY)
 504                 {
 505                 ASN1_TYPE *atype = (ASN1_TYPE *)*fld;
 506                 utype = atype->type;
 507                 fld = (ASN1_VALUE **)&atype->value.ptr;
 508                 str = (ASN1_STRING *)*fld;
 509                 if (pctx->flags & ASN1_PCTX_FLAGS_NO_ANY_TYPE)
 510                         pname = NULL;
 511                 else
 512                         pname = ASN1_tag2str(utype);
 513                 }
 514         else
 515                 {
 516                 if (pctx->flags & ASN1_PCTX_FLAGS_SHOW_TYPE)
 517                         pname = ASN1_tag2str(utype);
 518                 else
 519                         pname = NULL;
 520                 }
 521
 522         if (utype == V_ASN1_NULL)
 523                 {
 524                 if (BIO_puts(out, "NULL\n") <= 0)
 525                         return 0;
 526                 return 1;
 527                 }
 528
 529         if (pname)
 530                 {
 531                 if (BIO_puts(out, pname) <= 0)
 532                         return 0;
 533                 if (BIO_puts(out, ":") <= 0)
 534                         return 0;
 535                 }
 536
 537         switch (utype)
 538                 {
 539                 case V_ASN1_BOOLEAN:
 540                         {
 541                         int bool = *(int *)fld;
 542                         if (bool == -1)
 543                                 bool = it->size;
 544                         ret = asn1_print_boolean_ctx(out, bool, pctx);
 545                         }
 546                 break;
 547
 548                 case V_ASN1_INTEGER:
 549                 case V_ASN1_ENUMERATED:
 550                 ret = asn1_print_integer_ctx(out, str, pctx);
 551                 break;
 552
 553                 case V_ASN1_UTCTIME:
 554                 ret = ASN1_UTCTIME_print(out, str);
 555                 break;
 556
 557                 case V_ASN1_GENERALIZEDTIME:
 558                 ret = ASN1_GENERALIZEDTIME_print(out, str);
 559                 break;
 560
 561                 case V_ASN1_OBJECT:
 562                 ret = asn1_print_oid_ctx(out, (const ASN1_OBJECT *)*fld, pctx);
 563                 break;
 564
 565                 case V_ASN1_OCTET_STRING:
 566                 case V_ASN1_BIT_STRING:
 567                 ret = asn1_print_obstring_ctx(out, str, indent, pctx);
 568                 needlf = 0;
 569                 break;
 570
 571                 case V_ASN1_SEQUENCE:
 572                 case V_ASN1_SET:
 573                 case V_ASN1_OTHER:
 574                 if (BIO_puts(out, "\n") <= 0)
 575                         return 0;
 576                 if (ASN1_parse_dump(out, str->data, str->length,
 577                                                 indent, 0) <= 0)
 578                         ret = 0;
 579                 needlf = 0;
 580                 break;
 581
 582                 default:
 583                 ret = ASN1_STRING_print_ex(out, str, pctx->str_flags);
 584
 585                 }
 586         if (!ret)
 587                 return 0;
 588         if (needlf && BIO_puts(out, "\n") <= 0)
 589                 return 0;
 590         return 1;
 591         }