1/* v3_crld.c */ 2/* 3 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project 4 * 1999. 5 */ 6/* ==================================================================== 7 * Copyright (c) 1999-2008 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 <stdio.h> 61#include "cryptlib.h" 62#include <openssl/conf.h> 63#include <openssl/asn1.h> 64#include <openssl/asn1t.h> 65#include <openssl/x509v3.h> 66 67static void *v2i_crld(const X509V3_EXT_METHOD *method, 68 X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *nval); 69static int i2r_crldp(const X509V3_EXT_METHOD *method, void *pcrldp, BIO *out, 70 int indent); 71 72const X509V3_EXT_METHOD v3_crld = { 73 NID_crl_distribution_points, 0, ASN1_ITEM_ref(CRL_DIST_POINTS), 74 0, 0, 0, 0, 75 0, 0, 76 0, 77 v2i_crld, 78 i2r_crldp, 0, 79 NULL 80}; 81 82const X509V3_EXT_METHOD v3_freshest_crl = { 83 NID_freshest_crl, 0, ASN1_ITEM_ref(CRL_DIST_POINTS), 84 0, 0, 0, 0, 85 0, 0, 86 0, 87 v2i_crld, 88 i2r_crldp, 0, 89 NULL 90}; 91 92static STACK_OF(GENERAL_NAME) *gnames_from_sectname(X509V3_CTX *ctx, 93 char *sect) 94{ 95 STACK_OF(CONF_VALUE) *gnsect; 96 STACK_OF(GENERAL_NAME) *gens; 97 if (*sect == '@') 98 gnsect = X509V3_get_section(ctx, sect + 1); 99 else 100 gnsect = X509V3_parse_list(sect); 101 if (!gnsect) { 102 X509V3err(X509V3_F_GNAMES_FROM_SECTNAME, X509V3_R_SECTION_NOT_FOUND); 103 return NULL; 104 } 105 gens = v2i_GENERAL_NAMES(NULL, ctx, gnsect); 106 if (*sect == '@') 107 X509V3_section_free(ctx, gnsect); 108 else 109 sk_CONF_VALUE_pop_free(gnsect, X509V3_conf_free); 110 return gens; 111} 112 113static int set_dist_point_name(DIST_POINT_NAME **pdp, X509V3_CTX *ctx, 114 CONF_VALUE *cnf) 115{ 116 STACK_OF(GENERAL_NAME) *fnm = NULL; 117 STACK_OF(X509_NAME_ENTRY) *rnm = NULL; 118 if (!strncmp(cnf->name, "fullname", 9)) { 119 fnm = gnames_from_sectname(ctx, cnf->value); 120 if (!fnm) 121 goto err; 122 } else if (!strcmp(cnf->name, "relativename")) { 123 int ret; 124 STACK_OF(CONF_VALUE) *dnsect; 125 X509_NAME *nm; 126 nm = X509_NAME_new(); 127 if (!nm) 128 return -1; 129 dnsect = X509V3_get_section(ctx, cnf->value); 130 if (!dnsect) { 131 X509V3err(X509V3_F_SET_DIST_POINT_NAME, 132 X509V3_R_SECTION_NOT_FOUND); 133 return -1; 134 } 135 ret = X509V3_NAME_from_section(nm, dnsect, MBSTRING_ASC); 136 X509V3_section_free(ctx, dnsect); 137 rnm = nm->entries; 138 nm->entries = NULL; 139 X509_NAME_free(nm); 140 if (!ret || sk_X509_NAME_ENTRY_num(rnm) <= 0) 141 goto err; 142 /* 143 * Since its a name fragment can't have more than one RDNSequence 144 */ 145 if (sk_X509_NAME_ENTRY_value(rnm, 146 sk_X509_NAME_ENTRY_num(rnm) - 1)->set) { 147 X509V3err(X509V3_F_SET_DIST_POINT_NAME, 148 X509V3_R_INVALID_MULTIPLE_RDNS); 149 goto err; 150 } 151 } else 152 return 0; 153 154 if (*pdp) { 155 X509V3err(X509V3_F_SET_DIST_POINT_NAME, 156 X509V3_R_DISTPOINT_ALREADY_SET); 157 goto err; 158 } 159 160 *pdp = DIST_POINT_NAME_new(); 161 if (!*pdp) 162 goto err; 163 if (fnm) { 164 (*pdp)->type = 0; 165 (*pdp)->name.fullname = fnm; 166 } else { 167 (*pdp)->type = 1; 168 (*pdp)->name.relativename = rnm; 169 } 170 171 return 1; 172 173 err: 174 if (fnm) 175 sk_GENERAL_NAME_pop_free(fnm, GENERAL_NAME_free); 176 if (rnm) 177 sk_X509_NAME_ENTRY_pop_free(rnm, X509_NAME_ENTRY_free); 178 return -1; 179} 180 181static const BIT_STRING_BITNAME reason_flags[] = { 182 {0, "Unused", "unused"}, 183 {1, "Key Compromise", "keyCompromise"}, 184 {2, "CA Compromise", "CACompromise"}, 185 {3, "Affiliation Changed", "affiliationChanged"}, 186 {4, "Superseded", "superseded"}, 187 {5, "Cessation Of Operation", "cessationOfOperation"}, 188 {6, "Certificate Hold", "certificateHold"}, 189 {7, "Privilege Withdrawn", "privilegeWithdrawn"}, 190 {8, "AA Compromise", "AACompromise"}, 191 {-1, NULL, NULL} 192}; 193 194static int set_reasons(ASN1_BIT_STRING **preas, char *value) 195{ 196 STACK_OF(CONF_VALUE) *rsk = NULL; 197 const BIT_STRING_BITNAME *pbn; 198 const char *bnam; 199 int i, ret = 0; 200 rsk = X509V3_parse_list(value); 201 if (!rsk) 202 return 0; 203 if (*preas) 204 return 0; 205 for (i = 0; i < sk_CONF_VALUE_num(rsk); i++) { 206 bnam = sk_CONF_VALUE_value(rsk, i)->name; 207 if (!*preas) { 208 *preas = ASN1_BIT_STRING_new(); 209 if (!*preas) 210 goto err; 211 } 212 for (pbn = reason_flags; pbn->lname; pbn++) { 213 if (!strcmp(pbn->sname, bnam)) { 214 if (!ASN1_BIT_STRING_set_bit(*preas, pbn->bitnum, 1)) 215 goto err; 216 break; 217 } 218 } 219 if (!pbn->lname) 220 goto err; 221 } 222 ret = 1; 223 224 err: 225 sk_CONF_VALUE_pop_free(rsk, X509V3_conf_free); 226 return ret; 227} 228 229static int print_reasons(BIO *out, const char *rname, 230 ASN1_BIT_STRING *rflags, int indent) 231{ 232 int first = 1; 233 const BIT_STRING_BITNAME *pbn; 234 BIO_printf(out, "%*s%s:\n%*s", indent, "", rname, indent + 2, ""); 235 for (pbn = reason_flags; pbn->lname; pbn++) { 236 if (ASN1_BIT_STRING_get_bit(rflags, pbn->bitnum)) { 237 if (first) 238 first = 0; 239 else 240 BIO_puts(out, ", "); 241 BIO_puts(out, pbn->lname); 242 } 243 } 244 if (first) 245 BIO_puts(out, "<EMPTY>\n"); 246 else 247 BIO_puts(out, "\n"); 248 return 1; 249} 250 251static DIST_POINT *crldp_from_section(X509V3_CTX *ctx, 252 STACK_OF(CONF_VALUE) *nval) 253{ 254 int i; 255 CONF_VALUE *cnf; 256 DIST_POINT *point = NULL; 257 point = DIST_POINT_new(); 258 if (!point) 259 goto err; 260 for (i = 0; i < sk_CONF_VALUE_num(nval); i++) { 261 int ret; 262 cnf = sk_CONF_VALUE_value(nval, i); 263 ret = set_dist_point_name(&point->distpoint, ctx, cnf); 264 if (ret > 0) 265 continue; 266 if (ret < 0) 267 goto err; 268 if (!strcmp(cnf->name, "reasons")) { 269 if (!set_reasons(&point->reasons, cnf->value)) 270 goto err; 271 } else if (!strcmp(cnf->name, "CRLissuer")) { 272 point->CRLissuer = gnames_from_sectname(ctx, cnf->value); 273 if (!point->CRLissuer) 274 goto err; 275 } 276 } 277 278 return point; 279 280 err: 281 if (point) 282 DIST_POINT_free(point); 283 return NULL; 284} 285 286static void *v2i_crld(const X509V3_EXT_METHOD *method, 287 X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *nval) 288{ 289 STACK_OF(DIST_POINT) *crld = NULL; 290 GENERAL_NAMES *gens = NULL; 291 GENERAL_NAME *gen = NULL; 292 CONF_VALUE *cnf; 293 int i; 294 if (!(crld = sk_DIST_POINT_new_null())) 295 goto merr; 296 for (i = 0; i < sk_CONF_VALUE_num(nval); i++) { 297 DIST_POINT *point; 298 cnf = sk_CONF_VALUE_value(nval, i); 299 if (!cnf->value) { 300 STACK_OF(CONF_VALUE) *dpsect; 301 dpsect = X509V3_get_section(ctx, cnf->name); 302 if (!dpsect) 303 goto err; 304 point = crldp_from_section(ctx, dpsect); 305 X509V3_section_free(ctx, dpsect); 306 if (!point) 307 goto err; 308 if (!sk_DIST_POINT_push(crld, point)) { 309 DIST_POINT_free(point); 310 goto merr; 311 } 312 } else { 313 if (!(gen = v2i_GENERAL_NAME(method, ctx, cnf))) 314 goto err; 315 if (!(gens = GENERAL_NAMES_new())) 316 goto merr; 317 if (!sk_GENERAL_NAME_push(gens, gen)) 318 goto merr; 319 gen = NULL; 320 if (!(point = DIST_POINT_new())) 321 goto merr; 322 if (!sk_DIST_POINT_push(crld, point)) { 323 DIST_POINT_free(point); 324 goto merr; 325 } 326 if (!(point->distpoint = DIST_POINT_NAME_new())) 327 goto merr; 328 point->distpoint->name.fullname = gens; 329 point->distpoint->type = 0; 330 gens = NULL; 331 } 332 } 333 return crld; 334 335 merr: 336 X509V3err(X509V3_F_V2I_CRLD, ERR_R_MALLOC_FAILURE); 337 err: 338 GENERAL_NAME_free(gen); 339 GENERAL_NAMES_free(gens); 340 sk_DIST_POINT_pop_free(crld, DIST_POINT_free); 341 return NULL; 342} 343 344IMPLEMENT_STACK_OF(DIST_POINT) 345 346IMPLEMENT_ASN1_SET_OF(DIST_POINT) 347 348static int dpn_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it, 349 void *exarg) 350{ 351 DIST_POINT_NAME *dpn = (DIST_POINT_NAME *)*pval; 352 353 switch (operation) { 354 case ASN1_OP_NEW_POST: 355 dpn->dpname = NULL; 356 break; 357 358 case ASN1_OP_FREE_POST: 359 if (dpn->dpname) 360 X509_NAME_free(dpn->dpname); 361 break; 362 } 363 return 1; 364} 365 366 367ASN1_CHOICE_cb(DIST_POINT_NAME, dpn_cb) = { 368 ASN1_IMP_SEQUENCE_OF(DIST_POINT_NAME, name.fullname, GENERAL_NAME, 0), 369 ASN1_IMP_SET_OF(DIST_POINT_NAME, name.relativename, X509_NAME_ENTRY, 1) 370} ASN1_CHOICE_END_cb(DIST_POINT_NAME, DIST_POINT_NAME, type) 371 372 373IMPLEMENT_ASN1_FUNCTIONS(DIST_POINT_NAME) 374 375ASN1_SEQUENCE(DIST_POINT) = { 376 ASN1_EXP_OPT(DIST_POINT, distpoint, DIST_POINT_NAME, 0), 377 ASN1_IMP_OPT(DIST_POINT, reasons, ASN1_BIT_STRING, 1), 378 ASN1_IMP_SEQUENCE_OF_OPT(DIST_POINT, CRLissuer, GENERAL_NAME, 2) 379} ASN1_SEQUENCE_END(DIST_POINT) 380 381IMPLEMENT_ASN1_FUNCTIONS(DIST_POINT) 382 383ASN1_ITEM_TEMPLATE(CRL_DIST_POINTS) = 384 ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SEQUENCE_OF, 0, CRLDistributionPoints, DIST_POINT) 385ASN1_ITEM_TEMPLATE_END(CRL_DIST_POINTS) 386 387IMPLEMENT_ASN1_FUNCTIONS(CRL_DIST_POINTS) 388 389ASN1_SEQUENCE(ISSUING_DIST_POINT) = { 390 ASN1_EXP_OPT(ISSUING_DIST_POINT, distpoint, DIST_POINT_NAME, 0), 391 ASN1_IMP_OPT(ISSUING_DIST_POINT, onlyuser, ASN1_FBOOLEAN, 1), 392 ASN1_IMP_OPT(ISSUING_DIST_POINT, onlyCA, ASN1_FBOOLEAN, 2), 393 ASN1_IMP_OPT(ISSUING_DIST_POINT, onlysomereasons, ASN1_BIT_STRING, 3), 394 ASN1_IMP_OPT(ISSUING_DIST_POINT, indirectCRL, ASN1_FBOOLEAN, 4), 395 ASN1_IMP_OPT(ISSUING_DIST_POINT, onlyattr, ASN1_FBOOLEAN, 5) 396} ASN1_SEQUENCE_END(ISSUING_DIST_POINT) 397 398IMPLEMENT_ASN1_FUNCTIONS(ISSUING_DIST_POINT) 399 400static int i2r_idp(const X509V3_EXT_METHOD *method, void *pidp, BIO *out, 401 int indent); 402static void *v2i_idp(const X509V3_EXT_METHOD *method, X509V3_CTX *ctx, 403 STACK_OF(CONF_VALUE) *nval); 404 405const X509V3_EXT_METHOD v3_idp = { 406 NID_issuing_distribution_point, X509V3_EXT_MULTILINE, 407 ASN1_ITEM_ref(ISSUING_DIST_POINT), 408 0, 0, 0, 0, 409 0, 0, 410 0, 411 v2i_idp, 412 i2r_idp, 0, 413 NULL 414}; 415 416static void *v2i_idp(const X509V3_EXT_METHOD *method, X509V3_CTX *ctx, 417 STACK_OF(CONF_VALUE) *nval) 418{ 419 ISSUING_DIST_POINT *idp = NULL; 420 CONF_VALUE *cnf; 421 char *name, *val; 422 int i, ret; 423 idp = ISSUING_DIST_POINT_new(); 424 if (!idp) 425 goto merr; 426 for (i = 0; i < sk_CONF_VALUE_num(nval); i++) { 427 cnf = sk_CONF_VALUE_value(nval, i); 428 name = cnf->name; 429 val = cnf->value; 430 ret = set_dist_point_name(&idp->distpoint, ctx, cnf); 431 if (ret > 0) 432 continue; 433 if (ret < 0) 434 goto err; 435 if (!strcmp(name, "onlyuser")) { 436 if (!X509V3_get_value_bool(cnf, &idp->onlyuser)) 437 goto err; 438 } else if (!strcmp(name, "onlyCA")) { 439 if (!X509V3_get_value_bool(cnf, &idp->onlyCA)) 440 goto err; 441 } else if (!strcmp(name, "onlyAA")) { 442 if (!X509V3_get_value_bool(cnf, &idp->onlyattr)) 443 goto err; 444 } else if (!strcmp(name, "indirectCRL")) { 445 if (!X509V3_get_value_bool(cnf, &idp->indirectCRL)) 446 goto err; 447 } else if (!strcmp(name, "onlysomereasons")) { 448 if (!set_reasons(&idp->onlysomereasons, val)) 449 goto err; 450 } else { 451 X509V3err(X509V3_F_V2I_IDP, X509V3_R_INVALID_NAME); 452 X509V3_conf_err(cnf); 453 goto err; 454 } 455 } 456 return idp; 457 458 merr: 459 X509V3err(X509V3_F_V2I_IDP, ERR_R_MALLOC_FAILURE); 460 err: 461 ISSUING_DIST_POINT_free(idp); 462 return NULL; 463} 464 465static int print_gens(BIO *out, STACK_OF(GENERAL_NAME) *gens, int indent) 466{ 467 int i; 468 for (i = 0; i < sk_GENERAL_NAME_num(gens); i++) { 469 BIO_printf(out, "%*s", indent + 2, ""); 470 GENERAL_NAME_print(out, sk_GENERAL_NAME_value(gens, i)); 471 BIO_puts(out, "\n"); 472 } 473 return 1; 474} 475 476static int print_distpoint(BIO *out, DIST_POINT_NAME *dpn, int indent) 477{ 478 if (dpn->type == 0) { 479 BIO_printf(out, "%*sFull Name:\n", indent, ""); 480 print_gens(out, dpn->name.fullname, indent); 481 } else { 482 X509_NAME ntmp; 483 ntmp.entries = dpn->name.relativename; 484 BIO_printf(out, "%*sRelative Name:\n%*s", indent, "", indent + 2, ""); 485 X509_NAME_print_ex(out, &ntmp, 0, XN_FLAG_ONELINE); 486 BIO_puts(out, "\n"); 487 } 488 return 1; 489} 490 491static int i2r_idp(const X509V3_EXT_METHOD *method, void *pidp, BIO *out, 492 int indent) 493{ 494 ISSUING_DIST_POINT *idp = pidp; 495 if (idp->distpoint) 496 print_distpoint(out, idp->distpoint, indent); 497 if (idp->onlyuser > 0) 498 BIO_printf(out, "%*sOnly User Certificates\n", indent, ""); 499 if (idp->onlyCA > 0) 500 BIO_printf(out, "%*sOnly CA Certificates\n", indent, ""); 501 if (idp->indirectCRL > 0) 502 BIO_printf(out, "%*sIndirect CRL\n", indent, ""); 503 if (idp->onlysomereasons) 504 print_reasons(out, "Only Some Reasons", idp->onlysomereasons, indent); 505 if (idp->onlyattr > 0) 506 BIO_printf(out, "%*sOnly Attribute Certificates\n", indent, ""); 507 if (!idp->distpoint && (idp->onlyuser <= 0) && (idp->onlyCA <= 0) 508 && (idp->indirectCRL <= 0) && !idp->onlysomereasons 509 && (idp->onlyattr <= 0)) 510 BIO_printf(out, "%*s<EMPTY>\n", indent, ""); 511 512 return 1; 513} 514 515static int i2r_crldp(const X509V3_EXT_METHOD *method, void *pcrldp, BIO *out, 516 int indent) 517{ 518 STACK_OF(DIST_POINT) *crld = pcrldp; 519 DIST_POINT *point; 520 int i; 521 for (i = 0; i < sk_DIST_POINT_num(crld); i++) { 522 BIO_puts(out, "\n"); 523 point = sk_DIST_POINT_value(crld, i); 524 if (point->distpoint) 525 print_distpoint(out, point->distpoint, indent); 526 if (point->reasons) 527 print_reasons(out, "Reasons", point->reasons, indent); 528 if (point->CRLissuer) { 529 BIO_printf(out, "%*sCRL Issuer:\n", indent, ""); 530 print_gens(out, point->CRLissuer, indent); 531 } 532 } 533 return 1; 534} 535 536int DIST_POINT_set_dpname(DIST_POINT_NAME *dpn, X509_NAME *iname) 537{ 538 int i; 539 STACK_OF(X509_NAME_ENTRY) *frag; 540 X509_NAME_ENTRY *ne; 541 if (!dpn || (dpn->type != 1)) 542 return 1; 543 frag = dpn->name.relativename; 544 dpn->dpname = X509_NAME_dup(iname); 545 if (!dpn->dpname) 546 return 0; 547 for (i = 0; i < sk_X509_NAME_ENTRY_num(frag); i++) { 548 ne = sk_X509_NAME_ENTRY_value(frag, i); 549 if (!X509_NAME_add_entry(dpn->dpname, ne, -1, i ? 0 : 1)) { 550 X509_NAME_free(dpn->dpname); 551 dpn->dpname = NULL; 552 return 0; 553 } 554 } 555 /* generate cached encoding of name */ 556 if (i2d_X509_NAME(dpn->dpname, NULL) < 0) { 557 X509_NAME_free(dpn->dpname); 558 dpn->dpname = NULL; 559 return 0; 560 } 561 return 1; 562} 563