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 <time.h> 60 61#include <openssl/asn1t.h> 62#include <openssl/err.h> 63#include <openssl/obj.h> 64#include <openssl/mem.h> 65 66#include "asn1_locl.h" 67 68 69 70/* Print routines. 71 */ 72 73/* ASN1_PCTX routines */ 74 75ASN1_PCTX default_pctx = 76 { 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 85ASN1_PCTX *ASN1_PCTX_new(void) 86 { 87 ASN1_PCTX *ret; 88 ret = OPENSSL_malloc(sizeof(ASN1_PCTX)); 89 if (ret == NULL) 90 { 91 OPENSSL_PUT_ERROR(ASN1, ASN1_PCTX_new, ERR_R_MALLOC_FAILURE); 92 return NULL; 93 } 94 ret->flags = 0; 95 ret->nm_flags = 0; 96 ret->cert_flags = 0; 97 ret->oid_flags = 0; 98 ret->str_flags = 0; 99 return ret; 100 } 101 102void ASN1_PCTX_free(ASN1_PCTX *p) 103 { 104 OPENSSL_free(p); 105 } 106 107unsigned long ASN1_PCTX_get_flags(ASN1_PCTX *p) 108 { 109 return p->flags; 110 } 111 112void ASN1_PCTX_set_flags(ASN1_PCTX *p, unsigned long flags) 113 { 114 p->flags = flags; 115 } 116 117unsigned long ASN1_PCTX_get_nm_flags(ASN1_PCTX *p) 118 { 119 return p->nm_flags; 120 } 121 122void ASN1_PCTX_set_nm_flags(ASN1_PCTX *p, unsigned long flags) 123 { 124 p->nm_flags = flags; 125 } 126 127unsigned long ASN1_PCTX_get_cert_flags(ASN1_PCTX *p) 128 { 129 return p->cert_flags; 130 } 131 132void ASN1_PCTX_set_cert_flags(ASN1_PCTX *p, unsigned long flags) 133 { 134 p->cert_flags = flags; 135 } 136 137unsigned long ASN1_PCTX_get_oid_flags(ASN1_PCTX *p) 138 { 139 return p->oid_flags; 140 } 141 142void ASN1_PCTX_set_oid_flags(ASN1_PCTX *p, unsigned long flags) 143 { 144 p->oid_flags = flags; 145 } 146 147unsigned long ASN1_PCTX_get_str_flags(ASN1_PCTX *p) 148 { 149 return p->str_flags; 150 } 151 152void ASN1_PCTX_set_str_flags(ASN1_PCTX *p, unsigned long flags) 153 { 154 p->str_flags = flags; 155 } 156 157/* Main print routines */ 158 159static int asn1_item_print_ctx(BIO *out, ASN1_VALUE **fld, int indent, 160 const ASN1_ITEM *it, 161 const char *fname, const char *sname, 162 int nohdr, const ASN1_PCTX *pctx); 163 164int asn1_template_print_ctx(BIO *out, ASN1_VALUE **fld, int indent, 165 const ASN1_TEMPLATE *tt, const ASN1_PCTX *pctx); 166 167static int asn1_primitive_print(BIO *out, ASN1_VALUE **fld, 168 const ASN1_ITEM *it, int indent, 169 const char *fname, const char *sname, 170 const ASN1_PCTX *pctx); 171 172static int asn1_print_fsname(BIO *out, int indent, 173 const char *fname, const char *sname, 174 const ASN1_PCTX *pctx); 175 176int ASN1_item_print(BIO *out, ASN1_VALUE *ifld, int indent, 177 const ASN1_ITEM *it, const ASN1_PCTX *pctx) 178 { 179 const char *sname; 180 if (pctx == NULL) 181 pctx = &default_pctx; 182 if (pctx->flags & ASN1_PCTX_FLAGS_NO_STRUCT_NAME) 183 sname = NULL; 184 else 185 sname = it->sname; 186 return asn1_item_print_ctx(out, &ifld, indent, it, 187 NULL, sname, 0, pctx); 188 } 189 190static int asn1_item_print_ctx(BIO *out, ASN1_VALUE **fld, int indent, 191 const ASN1_ITEM *it, 192 const char *fname, const char *sname, 193 int nohdr, const ASN1_PCTX *pctx) 194 { 195 const ASN1_TEMPLATE *tt; 196 const ASN1_EXTERN_FUNCS *ef; 197 ASN1_VALUE **tmpfld; 198 const ASN1_AUX *aux = it->funcs; 199 ASN1_aux_cb *asn1_cb; 200 ASN1_PRINT_ARG parg; 201 int i; 202 if (aux && aux->asn1_cb) 203 { 204 parg.out = out; 205 parg.indent = indent; 206 parg.pctx = pctx; 207 asn1_cb = aux->asn1_cb; 208 } 209 else asn1_cb = 0; 210 211 if(*fld == NULL) 212 { 213 if (pctx->flags & ASN1_PCTX_FLAGS_SHOW_ABSENT) 214 { 215 if (!nohdr && !asn1_print_fsname(out, indent, 216 fname, sname, pctx)) 217 return 0; 218 if (BIO_puts(out, "<ABSENT>\n") <= 0) 219 return 0; 220 } 221 return 1; 222 } 223 224 switch(it->itype) 225 { 226 case ASN1_ITYPE_PRIMITIVE: 227 if(it->templates) 228 { 229 if (!asn1_template_print_ctx(out, fld, indent, 230 it->templates, pctx)) 231 return 0; 232 } 233 /* fall thru */ 234 case ASN1_ITYPE_MSTRING: 235 if (!asn1_primitive_print(out, fld, it, 236 indent, fname, sname,pctx)) 237 return 0; 238 break; 239 240 case ASN1_ITYPE_EXTERN: 241 if (!nohdr && !asn1_print_fsname(out, indent, fname, sname, pctx)) 242 return 0; 243 /* Use new style print routine if possible */ 244 ef = it->funcs; 245 if (ef && ef->asn1_ex_print) 246 { 247 i = ef->asn1_ex_print(out, fld, indent, "", pctx); 248 if (!i) 249 return 0; 250 if ((i == 2) && (BIO_puts(out, "\n") <= 0)) 251 return 0; 252 return 1; 253 } 254 else if (sname && 255 BIO_printf(out, ":EXTERNAL TYPE %s\n", sname) <= 0) 256 return 0; 257 break; 258 259 case ASN1_ITYPE_CHOICE: 260#if 0 261 if (!nohdr && !asn1_print_fsname(out, indent, fname, sname, pctx)) 262 return 0; 263#endif 264 /* CHOICE type, get selector */ 265 i = asn1_get_choice_selector(fld, it); 266 /* This should never happen... */ 267 if((i < 0) || (i >= it->tcount)) 268 { 269 if (BIO_printf(out, 270 "ERROR: selector [%d] invalid\n", i) <= 0) 271 return 0; 272 return 1; 273 } 274 tt = it->templates + i; 275 tmpfld = asn1_get_field_ptr(fld, tt); 276 if (!asn1_template_print_ctx(out, tmpfld, indent, tt, pctx)) 277 return 0; 278 break; 279 280 case ASN1_ITYPE_SEQUENCE: 281 case ASN1_ITYPE_NDEF_SEQUENCE: 282 if (!nohdr && !asn1_print_fsname(out, indent, fname, sname, pctx)) 283 return 0; 284 if (fname || sname) 285 { 286 if (pctx->flags & ASN1_PCTX_FLAGS_SHOW_SEQUENCE) 287 { 288 if (BIO_puts(out, " {\n") <= 0) 289 return 0; 290 } 291 else 292 { 293 if (BIO_puts(out, "\n") <= 0) 294 return 0; 295 } 296 } 297 298 if (asn1_cb) 299 { 300 i = asn1_cb(ASN1_OP_PRINT_PRE, fld, it, &parg); 301 if (i == 0) 302 return 0; 303 if (i == 2) 304 return 1; 305 } 306 307 /* Print each field entry */ 308 for(i = 0, tt = it->templates; i < it->tcount; i++, tt++) 309 { 310 const ASN1_TEMPLATE *seqtt; 311 seqtt = asn1_do_adb(fld, tt, 1); 312 tmpfld = asn1_get_field_ptr(fld, seqtt); 313 if (!asn1_template_print_ctx(out, tmpfld, 314 indent + 2, seqtt, pctx)) 315 return 0; 316 } 317 if (pctx->flags & ASN1_PCTX_FLAGS_SHOW_SEQUENCE) 318 { 319 if (BIO_printf(out, "%*s}\n", indent, "") < 0) 320 return 0; 321 } 322 323 if (asn1_cb) 324 { 325 i = asn1_cb(ASN1_OP_PRINT_POST, fld, it, &parg); 326 if (i == 0) 327 return 0; 328 } 329 break; 330 331 default: 332 BIO_printf(out, "Unprocessed type %d\n", it->itype); 333 return 0; 334 } 335 336 return 1; 337 } 338 339int asn1_template_print_ctx(BIO *out, ASN1_VALUE **fld, int indent, 340 const ASN1_TEMPLATE *tt, const ASN1_PCTX *pctx) 341 { 342 int flags; 343 size_t i; 344 const char *sname, *fname; 345 flags = tt->flags; 346 if(pctx->flags & ASN1_PCTX_FLAGS_SHOW_FIELD_STRUCT_NAME) 347 sname = ASN1_ITEM_ptr(tt->item)->sname; 348 else 349 sname = NULL; 350 if(pctx->flags & ASN1_PCTX_FLAGS_NO_FIELD_NAME) 351 fname = NULL; 352 else 353 fname = tt->field_name; 354 if(flags & ASN1_TFLG_SK_MASK) 355 { 356 const char *tname; 357 ASN1_VALUE *skitem; 358 STACK_OF(ASN1_VALUE) *stack; 359 360 /* SET OF, SEQUENCE OF */ 361 if (fname) 362 { 363 if(pctx->flags & ASN1_PCTX_FLAGS_SHOW_SSOF) 364 { 365 if(flags & ASN1_TFLG_SET_OF) 366 tname = "SET"; 367 else 368 tname = "SEQUENCE"; 369 if (BIO_printf(out, "%*s%s OF %s {\n", 370 indent, "", tname, tt->field_name) <= 0) 371 return 0; 372 } 373 else if (BIO_printf(out, "%*s%s:\n", indent, "", 374 fname) <= 0) 375 return 0; 376 } 377 stack = (STACK_OF(ASN1_VALUE) *)*fld; 378 for(i = 0; i < sk_ASN1_VALUE_num(stack); i++) 379 { 380 if ((i > 0) && (BIO_puts(out, "\n") <= 0)) 381 return 0; 382 383 skitem = sk_ASN1_VALUE_value(stack, i); 384 if (!asn1_item_print_ctx(out, &skitem, indent + 2, 385 ASN1_ITEM_ptr(tt->item), NULL, NULL, 1, pctx)) 386 return 0; 387 } 388 if (!i && BIO_printf(out, "%*s<EMPTY>\n", indent + 2, "") <= 0) 389 return 0; 390 if(pctx->flags & ASN1_PCTX_FLAGS_SHOW_SEQUENCE) 391 { 392 if (BIO_printf(out, "%*s}\n", indent, "") <= 0) 393 return 0; 394 } 395 return 1; 396 } 397 return asn1_item_print_ctx(out, fld, indent, ASN1_ITEM_ptr(tt->item), 398 fname, sname, 0, pctx); 399 } 400 401static int asn1_print_fsname(BIO *out, int indent, 402 const char *fname, const char *sname, 403 const ASN1_PCTX *pctx) 404 { 405 static char spaces[] = " "; 406 const int nspaces = sizeof(spaces) - 1; 407 408#if 0 409 if (!sname && !fname) 410 return 1; 411#endif 412 413 while (indent > nspaces) 414 { 415 if (BIO_write(out, spaces, nspaces) != nspaces) 416 return 0; 417 indent -= nspaces; 418 } 419 if (BIO_write(out, spaces, indent) != indent) 420 return 0; 421 if (pctx->flags & ASN1_PCTX_FLAGS_NO_STRUCT_NAME) 422 sname = NULL; 423 if (pctx->flags & ASN1_PCTX_FLAGS_NO_FIELD_NAME) 424 fname = NULL; 425 if (!sname && !fname) 426 return 1; 427 if (fname) 428 { 429 if (BIO_puts(out, fname) <= 0) 430 return 0; 431 } 432 if (sname) 433 { 434 if (fname) 435 { 436 if (BIO_printf(out, " (%s)", sname) <= 0) 437 return 0; 438 } 439 else 440 { 441 if (BIO_puts(out, sname) <= 0) 442 return 0; 443 } 444 } 445 if (BIO_write(out, ": ", 2) != 2) 446 return 0; 447 return 1; 448 } 449 450static int asn1_print_boolean_ctx(BIO *out, int boolval, 451 const ASN1_PCTX *pctx) 452 { 453 const char *str; 454 switch (boolval) 455 { 456 case -1: 457 str = "BOOL ABSENT"; 458 break; 459 460 case 0: 461 str = "FALSE"; 462 break; 463 464 default: 465 str = "TRUE"; 466 break; 467 468 } 469 470 if (BIO_puts(out, str) <= 0) 471 return 0; 472 return 1; 473 474 } 475 476static int asn1_print_integer_ctx(BIO *out, ASN1_INTEGER *str, 477 const ASN1_PCTX *pctx) 478 { 479 BIGNUM *bn = NULL; 480 char *s = NULL; 481 int ret = 1; 482 483 bn = ASN1_INTEGER_to_BN(str, NULL); 484 if (bn == NULL) { 485 return 0; 486 } 487 s = BN_bn2dec(bn); 488 BN_free(bn); 489 if (s == NULL) { 490 return 0; 491 } 492 493 if (BIO_puts(out, s) <= 0) { 494 ret = 0; 495 } 496 OPENSSL_free(s); 497 return ret; 498 } 499 500static int asn1_print_oid_ctx(BIO *out, const ASN1_OBJECT *oid, 501 const ASN1_PCTX *pctx) 502 { 503 char objbuf[80]; 504 const char *ln; 505 ln = OBJ_nid2ln(OBJ_obj2nid(oid)); 506 if(!ln) 507 ln = ""; 508 OBJ_obj2txt(objbuf, sizeof objbuf, oid, 1); 509 if (BIO_printf(out, "%s (%s)", ln, objbuf) <= 0) 510 return 0; 511 return 1; 512 } 513 514static int asn1_print_obstring_ctx(BIO *out, ASN1_STRING *str, int indent, 515 const ASN1_PCTX *pctx) 516 { 517 if (str->type == V_ASN1_BIT_STRING) 518 { 519 if (BIO_printf(out, " (%ld unused bits)\n", 520 str->flags & 0x7) <= 0) 521 return 0; 522 } 523 else if (BIO_puts(out, "\n") <= 0) 524 return 0; 525 if (str->length > 0 && !BIO_hexdump(out, str->data, str->length, indent + 2)) { 526 return 0; 527 } 528 return 1; 529 } 530 531static int asn1_primitive_print(BIO *out, ASN1_VALUE **fld, 532 const ASN1_ITEM *it, int indent, 533 const char *fname, const char *sname, 534 const ASN1_PCTX *pctx) 535 { 536 long utype; 537 ASN1_STRING *str; 538 int ret = 1, needlf = 1; 539 const char *pname; 540 const ASN1_PRIMITIVE_FUNCS *pf; 541 pf = it->funcs; 542 if (!asn1_print_fsname(out, indent, fname, sname, pctx)) 543 return 0; 544 if (pf && pf->prim_print) 545 return pf->prim_print(out, fld, it, indent, pctx); 546 str = (ASN1_STRING *)*fld; 547 if (it->itype == ASN1_ITYPE_MSTRING) 548 utype = str->type & ~V_ASN1_NEG; 549 else 550 utype = it->utype; 551 if (utype == V_ASN1_ANY) 552 { 553 ASN1_TYPE *atype = (ASN1_TYPE *)*fld; 554 utype = atype->type; 555 fld = &atype->value.asn1_value; 556 str = (ASN1_STRING *)*fld; 557 if (pctx->flags & ASN1_PCTX_FLAGS_NO_ANY_TYPE) 558 pname = NULL; 559 else 560 pname = ASN1_tag2str(utype); 561 } 562 else 563 { 564 if (pctx->flags & ASN1_PCTX_FLAGS_SHOW_TYPE) 565 pname = ASN1_tag2str(utype); 566 else 567 pname = NULL; 568 } 569 570 if (utype == V_ASN1_NULL) 571 { 572 if (BIO_puts(out, "NULL\n") <= 0) 573 return 0; 574 return 1; 575 } 576 577 if (pname) 578 { 579 if (BIO_puts(out, pname) <= 0) 580 return 0; 581 if (BIO_puts(out, ":") <= 0) 582 return 0; 583 } 584 585 switch (utype) 586 { 587 case V_ASN1_BOOLEAN: 588 { 589 int boolval = *(int *)fld; 590 if (boolval == -1) 591 boolval = it->size; 592 ret = asn1_print_boolean_ctx(out, boolval, pctx); 593 } 594 break; 595 596 case V_ASN1_INTEGER: 597 case V_ASN1_ENUMERATED: 598 ret = asn1_print_integer_ctx(out, str, pctx); 599 break; 600 601 case V_ASN1_UTCTIME: 602 ret = ASN1_UTCTIME_print(out, str); 603 break; 604 605 case V_ASN1_GENERALIZEDTIME: 606 ret = ASN1_GENERALIZEDTIME_print(out, str); 607 break; 608 609 case V_ASN1_OBJECT: 610 ret = asn1_print_oid_ctx(out, (const ASN1_OBJECT *)*fld, pctx); 611 break; 612 613 case V_ASN1_OCTET_STRING: 614 case V_ASN1_BIT_STRING: 615 ret = asn1_print_obstring_ctx(out, str, indent, pctx); 616 needlf = 0; 617 break; 618 619 case V_ASN1_SEQUENCE: 620 case V_ASN1_SET: 621 case V_ASN1_OTHER: 622 if (BIO_puts(out, "\n") <= 0) 623 return 0; 624 if (ASN1_parse_dump(out, str->data, str->length, 625 indent, 0) <= 0) 626 ret = 0; 627 needlf = 0; 628 break; 629 630 default: 631 ret = ASN1_STRING_print_ex(out, str, pctx->str_flags); 632 633 } 634 if (!ret) 635 return 0; 636 if (needlf && BIO_puts(out, "\n") <= 0) 637 return 0; 638 return 1; 639 } 640