Cryptlib/OpenSSL/crypto/asn1/tasn_prn.c

   1 /* tasn_prn.c */
   2 /*
   3  * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
   4  * 2000.
   5  */
   6 /* ====================================================================
   7  * Copyright (c) 2000,2005 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 "cryptlib.h"
  62 #include <openssl/asn1.h>
  63 #include <openssl/asn1t.h>
  64 #include <openssl/objects.h>
  65 #include <openssl/buffer.h>
  66 #include <openssl/err.h>
  67 #include <openssl/x509v3.h>
  68 #include "asn1_locl.h"
  69
  70 /*
  71  * Print routines.
  72  */
  73
  74 /* ASN1_PCTX routines */
  75
  76 ASN1_PCTX default_pctx = {
  77     ASN1_PCTX_FLAGS_SHOW_ABSENT, /* flags */
  78     0,                          /* nm_flags */
  79     0,                          /* cert_flags */
  80     0,                          /* oid_flags */
  81     0                           /* str_flags */
  82 };
  83
  84 ASN1_PCTX *ASN1_PCTX_new(void)
  85 {
  86     ASN1_PCTX *ret;
  87     ret = OPENSSL_malloc(sizeof(ASN1_PCTX));
  88     if (ret == NULL) {
  89         ASN1err(ASN1_F_ASN1_PCTX_NEW, ERR_R_MALLOC_FAILURE);
  90         return NULL;
  91     }
  92     ret->flags = 0;
  93     ret->nm_flags = 0;
  94     ret->cert_flags = 0;
  95     ret->oid_flags = 0;
  96     ret->str_flags = 0;
  97     return ret;
  98 }
  99
 100 void ASN1_PCTX_free(ASN1_PCTX *p)
 101 {
 102     OPENSSL_free(p);
 103 }
 104
 105 unsigned long ASN1_PCTX_get_flags(ASN1_PCTX *p)
 106 {
 107     return p->flags;
 108 }
 109
 110 void ASN1_PCTX_set_flags(ASN1_PCTX *p, unsigned long flags)
 111 {
 112     p->flags = flags;
 113 }
 114
 115 unsigned long ASN1_PCTX_get_nm_flags(ASN1_PCTX *p)
 116 {
 117     return p->nm_flags;
 118 }
 119
 120 void ASN1_PCTX_set_nm_flags(ASN1_PCTX *p, unsigned long flags)
 121 {
 122     p->nm_flags = flags;
 123 }
 124
 125 unsigned long ASN1_PCTX_get_cert_flags(ASN1_PCTX *p)
 126 {
 127     return p->cert_flags;
 128 }
 129
 130 void ASN1_PCTX_set_cert_flags(ASN1_PCTX *p, unsigned long flags)
 131 {
 132     p->cert_flags = flags;
 133 }
 134
 135 unsigned long ASN1_PCTX_get_oid_flags(ASN1_PCTX *p)
 136 {
 137     return p->oid_flags;
 138 }
 139
 140 void ASN1_PCTX_set_oid_flags(ASN1_PCTX *p, unsigned long flags)
 141 {
 142     p->oid_flags = flags;
 143 }
 144
 145 unsigned long ASN1_PCTX_get_str_flags(ASN1_PCTX *p)
 146 {
 147     return p->str_flags;
 148 }
 149
 150 void ASN1_PCTX_set_str_flags(ASN1_PCTX *p, unsigned long flags)
 151 {
 152     p->str_flags = flags;
 153 }
 154
 155 /* Main print routines */
 156
 157 static int asn1_item_print_ctx(BIO *out, ASN1_VALUE **fld, int indent,
 158                                const ASN1_ITEM *it,
 159                                const char *fname, const char *sname,
 160                                int nohdr, const ASN1_PCTX *pctx);
 161
 162 int asn1_template_print_ctx(BIO *out, ASN1_VALUE **fld, int indent,
 163                             const ASN1_TEMPLATE *tt, const ASN1_PCTX *pctx);
 164
 165 static int asn1_primitive_print(BIO *out, ASN1_VALUE **fld,
 166                                 const ASN1_ITEM *it, int indent,
 167                                 const char *fname, const char *sname,
 168                                 const ASN1_PCTX *pctx);
 169
 170 static int asn1_print_fsname(BIO *out, int indent,
 171                              const char *fname, const char *sname,
 172                              const ASN1_PCTX *pctx);
 173
 174 int ASN1_item_print(BIO *out, ASN1_VALUE *ifld, int indent,
 175                     const ASN1_ITEM *it, const ASN1_PCTX *pctx)
 176 {
 177     const char *sname;
 178     if (pctx == NULL)
 179         pctx = &default_pctx;
 180     if (pctx->flags & ASN1_PCTX_FLAGS_NO_STRUCT_NAME)
 181         sname = NULL;
 182     else
 183         sname = it->sname;
 184     return asn1_item_print_ctx(out, &ifld, indent, it, NULL, sname, 0, pctx);
 185 }
 186
 187 static int asn1_item_print_ctx(BIO *out, ASN1_VALUE **fld, int indent,
 188                                const ASN1_ITEM *it,
 189                                const char *fname, const char *sname,
 190                                int nohdr, const ASN1_PCTX *pctx)
 191 {
 192     const ASN1_TEMPLATE *tt;
 193     const ASN1_EXTERN_FUNCS *ef;
 194     ASN1_VALUE **tmpfld;
 195     const ASN1_AUX *aux = it->funcs;
 196     ASN1_aux_cb *asn1_cb;
 197     ASN1_PRINT_ARG parg;
 198     int i;
 199     if (aux && aux->asn1_cb) {
 200         parg.out = out;
 201         parg.indent = indent;
 202         parg.pctx = pctx;
 203         asn1_cb = aux->asn1_cb;
 204     } else
 205         asn1_cb = 0;
 206
 207    if (((it->itype != ASN1_ITYPE_PRIMITIVE)
 208        || (it->utype != V_ASN1_BOOLEAN)) && *fld == NULL) {
 209         if (pctx->flags & ASN1_PCTX_FLAGS_SHOW_ABSENT) {
 210             if (!nohdr && !asn1_print_fsname(out, indent, fname, sname, pctx))
 211                 return 0;
 212             if (BIO_puts(out, "<ABSENT>\n") <= 0)
 213                 return 0;
 214         }
 215         return 1;
 216     }
 217
 218     switch (it->itype) {
 219     case ASN1_ITYPE_PRIMITIVE:
 220         if (it->templates) {
 221             if (!asn1_template_print_ctx(out, fld, indent,
 222                                          it->templates, pctx))
 223                 return 0;
 224             break;
 225         }
 226         /* fall thru */
 227     case ASN1_ITYPE_MSTRING:
 228         if (!asn1_primitive_print(out, fld, it, indent, fname, sname, pctx))
 229             return 0;
 230         break;
 231
 232     case ASN1_ITYPE_EXTERN:
 233         if (!nohdr && !asn1_print_fsname(out, indent, fname, sname, pctx))
 234             return 0;
 235         /* Use new style print routine if possible */
 236         ef = it->funcs;
 237         if (ef && ef->asn1_ex_print) {
 238             i = ef->asn1_ex_print(out, fld, indent, "", pctx);
 239             if (!i)
 240                 return 0;
 241             if ((i == 2) && (BIO_puts(out, "\n") <= 0))
 242                 return 0;
 243             return 1;
 244         } else if (sname &&
 245                    BIO_printf(out, ":EXTERNAL TYPE %s\n", sname) <= 0)
 246             return 0;
 247         break;
 248
 249     case ASN1_ITYPE_CHOICE:
 250 #if 0
 251         if (!nohdr && !asn1_print_fsname(out, indent, fname, sname, pctx))
 252             return 0;
 253 #endif
 254         /* CHOICE type, get selector */
 255         i = asn1_get_choice_selector(fld, it);
 256         /* This should never happen... */
 257         if ((i < 0) || (i >= it->tcount)) {
 258             if (BIO_printf(out, "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             if (pctx->flags & ASN1_PCTX_FLAGS_SHOW_SEQUENCE) {
 274                 if (BIO_puts(out, " {\n") <= 0)
 275                     return 0;
 276             } else {
 277                 if (BIO_puts(out, "\n") <= 0)
 278                     return 0;
 279             }
 280         }
 281
 282         if (asn1_cb) {
 283             i = asn1_cb(ASN1_OP_PRINT_PRE, fld, it, &parg);
 284             if (i == 0)
 285                 return 0;
 286             if (i == 2)
 287                 return 1;
 288         }
 289
 290         /* Print each field entry */
 291         for (i = 0, tt = it->templates; i < it->tcount; i++, tt++) {
 292             const ASN1_TEMPLATE *seqtt;
 293             seqtt = asn1_do_adb(fld, tt, 1);
 294             if (!seqtt)
 295                 return 0;
 296             tmpfld = asn1_get_field_ptr(fld, seqtt);
 297             if (!asn1_template_print_ctx(out, tmpfld,
 298                                          indent + 2, seqtt, pctx))
 299                 return 0;
 300         }
 301         if (pctx->flags & ASN1_PCTX_FLAGS_SHOW_SEQUENCE) {
 302             if (BIO_printf(out, "%*s}\n", indent, "") < 0)
 303                 return 0;
 304         }
 305
 306         if (asn1_cb) {
 307             i = asn1_cb(ASN1_OP_PRINT_POST, fld, it, &parg);
 308             if (i == 0)
 309                 return 0;
 310         }
 311         break;
 312
 313     default:
 314         BIO_printf(out, "Unprocessed type %d\n", it->itype);
 315         return 0;
 316     }
 317
 318     return 1;
 319 }
 320
 321 int asn1_template_print_ctx(BIO *out, ASN1_VALUE **fld, int indent,
 322                             const ASN1_TEMPLATE *tt, const ASN1_PCTX *pctx)
 323 {
 324     int i, flags;
 325     const char *sname, *fname;
 326     flags = tt->flags;
 327     if (pctx->flags & ASN1_PCTX_FLAGS_SHOW_FIELD_STRUCT_NAME)
 328         sname = ASN1_ITEM_ptr(tt->item)->sname;
 329     else
 330         sname = NULL;
 331     if (pctx->flags & ASN1_PCTX_FLAGS_NO_FIELD_NAME)
 332         fname = NULL;
 333     else
 334         fname = tt->field_name;
 335     if (flags & ASN1_TFLG_SK_MASK) {
 336         char *tname;
 337         ASN1_VALUE *skitem;
 338         STACK_OF(ASN1_VALUE) *stack;
 339
 340         /* SET OF, SEQUENCE OF */
 341         if (fname) {
 342             if (pctx->flags & ASN1_PCTX_FLAGS_SHOW_SSOF) {
 343                 if (flags & ASN1_TFLG_SET_OF)
 344                     tname = "SET";
 345                 else
 346                     tname = "SEQUENCE";
 347                 if (BIO_printf(out, "%*s%s OF %s {\n",
 348                                indent, "", tname, tt->field_name) <= 0)
 349                     return 0;
 350             } else if (BIO_printf(out, "%*s%s:\n", indent, "", fname) <= 0)
 351                 return 0;
 352         }
 353         stack = (STACK_OF(ASN1_VALUE) *)*fld;
 354         for (i = 0; i < sk_ASN1_VALUE_num(stack); i++) {
 355             if ((i > 0) && (BIO_puts(out, "\n") <= 0))
 356                 return 0;
 357
 358             skitem = sk_ASN1_VALUE_value(stack, i);
 359             if (!asn1_item_print_ctx(out, &skitem, indent + 2,
 360                                      ASN1_ITEM_ptr(tt->item), NULL, NULL, 1,
 361                                      pctx))
 362                 return 0;
 363         }
 364         if (!i && BIO_printf(out, "%*s<EMPTY>\n", indent + 2, "") <= 0)
 365             return 0;
 366         if (pctx->flags & ASN1_PCTX_FLAGS_SHOW_SEQUENCE) {
 367             if (BIO_printf(out, "%*s}\n", indent, "") <= 0)
 368                 return 0;
 369         }
 370         return 1;
 371     }
 372     return asn1_item_print_ctx(out, fld, indent, ASN1_ITEM_ptr(tt->item),
 373                                fname, sname, 0, pctx);
 374 }
 375
 376 static int asn1_print_fsname(BIO *out, int indent,
 377                              const char *fname, const char *sname,
 378                              const ASN1_PCTX *pctx)
 379 {
 380     static char spaces[] = "                    ";
 381     const int nspaces = sizeof(spaces) - 1;
 382
 383 #if 0
 384     if (!sname && !fname)
 385         return 1;
 386 #endif
 387
 388     while (indent > nspaces) {
 389         if (BIO_write(out, spaces, nspaces) != nspaces)
 390             return 0;
 391         indent -= nspaces;
 392     }
 393     if (BIO_write(out, spaces, indent) != indent)
 394         return 0;
 395     if (pctx->flags & ASN1_PCTX_FLAGS_NO_STRUCT_NAME)
 396         sname = NULL;
 397     if (pctx->flags & ASN1_PCTX_FLAGS_NO_FIELD_NAME)
 398         fname = NULL;
 399     if (!sname && !fname)
 400         return 1;
 401     if (fname) {
 402         if (BIO_puts(out, fname) <= 0)
 403             return 0;
 404     }
 405     if (sname) {
 406         if (fname) {
 407             if (BIO_printf(out, " (%s)", sname) <= 0)
 408                 return 0;
 409         } else {
 410             if (BIO_puts(out, sname) <= 0)
 411                 return 0;
 412         }
 413     }
 414     if (BIO_write(out, ": ", 2) != 2)
 415         return 0;
 416     return 1;
 417 }
 418
 419 static int asn1_print_boolean_ctx(BIO *out, int boolval,
 420                                   const ASN1_PCTX *pctx)
 421 {
 422     const char *str;
 423     switch (boolval) {
 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 (s == NULL)
 451         return 0;
 452     if (BIO_puts(out, s) <= 0)
 453         ret = 0;
 454     OPENSSL_free(s);
 455     return ret;
 456 }
 457
 458 static int asn1_print_oid_ctx(BIO *out, const ASN1_OBJECT *oid,
 459                               const ASN1_PCTX *pctx)
 460 {
 461     char objbuf[80];
 462     const char *ln;
 463     ln = OBJ_nid2ln(OBJ_obj2nid(oid));
 464     if (!ln)
 465         ln = "";
 466     OBJ_obj2txt(objbuf, sizeof objbuf, oid, 1);
 467     if (BIO_printf(out, "%s (%s)", ln, objbuf) <= 0)
 468         return 0;
 469     return 1;
 470 }
 471
 472 static int asn1_print_obstring_ctx(BIO *out, ASN1_STRING *str, int indent,
 473                                    const ASN1_PCTX *pctx)
 474 {
 475     if (str->type == V_ASN1_BIT_STRING) {
 476         if (BIO_printf(out, " (%ld unused bits)\n", str->flags & 0x7) <= 0)
 477             return 0;
 478     } else if (BIO_puts(out, "\n") <= 0)
 479         return 0;
 480     if ((str->length > 0)
 481         && 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     const ASN1_PRIMITIVE_FUNCS *pf;
 497     pf = it->funcs;
 498     if (!asn1_print_fsname(out, indent, fname, sname, pctx))
 499         return 0;
 500     if (pf && pf->prim_print)
 501         return pf->prim_print(out, fld, it, indent, pctx);
 502     if (it->itype == ASN1_ITYPE_MSTRING) {
 503         str = (ASN1_STRING *)*fld;
 504         utype = str->type & ~V_ASN1_NEG;
 505     } else {
 506         utype = it->utype;
 507         if (utype == V_ASN1_BOOLEAN)
 508             str = NULL;
 509         else
 510             str = (ASN1_STRING *)*fld;
 511     }
 512     if (utype == V_ASN1_ANY) {
 513         ASN1_TYPE *atype = (ASN1_TYPE *)*fld;
 514         utype = atype->type;
 515         fld = &atype->value.asn1_value;
 516         str = (ASN1_STRING *)*fld;
 517         if (pctx->flags & ASN1_PCTX_FLAGS_NO_ANY_TYPE)
 518             pname = NULL;
 519         else
 520             pname = ASN1_tag2str(utype);
 521     } else {
 522         if (pctx->flags & ASN1_PCTX_FLAGS_SHOW_TYPE)
 523             pname = ASN1_tag2str(utype);
 524         else
 525             pname = NULL;
 526     }
 527
 528     if (utype == V_ASN1_NULL) {
 529         if (BIO_puts(out, "NULL\n") <= 0)
 530             return 0;
 531         return 1;
 532     }
 533
 534     if (pname) {
 535         if (BIO_puts(out, pname) <= 0)
 536             return 0;
 537         if (BIO_puts(out, ":") <= 0)
 538             return 0;
 539     }
 540
 541     switch (utype) {
 542     case V_ASN1_BOOLEAN:
 543         {
 544             int boolval = *(int *)fld;
 545             if (boolval == -1)
 546                 boolval = it->size;
 547             ret = asn1_print_boolean_ctx(out, boolval, pctx);
 548         }
 549         break;
 550
 551     case V_ASN1_INTEGER:
 552     case V_ASN1_ENUMERATED:
 553         ret = asn1_print_integer_ctx(out, str, pctx);
 554         break;
 555
 556     case V_ASN1_UTCTIME:
 557         ret = ASN1_UTCTIME_print(out, str);
 558         break;
 559
 560     case V_ASN1_GENERALIZEDTIME:
 561         ret = ASN1_GENERALIZEDTIME_print(out, str);
 562         break;
 563
 564     case V_ASN1_OBJECT:
 565         ret = asn1_print_oid_ctx(out, (const ASN1_OBJECT *)*fld, pctx);
 566         break;
 567
 568     case V_ASN1_OCTET_STRING:
 569     case V_ASN1_BIT_STRING:
 570         ret = asn1_print_obstring_ctx(out, str, indent, pctx);
 571         needlf = 0;
 572         break;
 573
 574     case V_ASN1_SEQUENCE:
 575     case V_ASN1_SET:
 576     case V_ASN1_OTHER:
 577         if (BIO_puts(out, "\n") <= 0)
 578             return 0;
 579         if (ASN1_parse_dump(out, str->data, str->length, indent, 0) <= 0)
 580             ret = 0;
 581         needlf = 0;
 582         break;
 583
 584     default:
 585         ret = ASN1_STRING_print_ex(out, str, pctx->str_flags);
 586
 587     }
 588     if (!ret)
 589         return 0;
 590     if (needlf && BIO_puts(out, "\n") <= 0)
 591         return 0;
 592     return 1;
 593 }