crypto/x509/v3_crld.c

   1 /*
   2  * Copyright 1999-2016 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 #include <stdio.h>
  11 #include "internal/cryptlib.h"
  12 #include <openssl/conf.h>
  13 #include <openssl/asn1.h>
  14 #include <openssl/asn1t.h>
  15 #include <openssl/x509v3.h>
  16
  17 #include "crypto/x509.h"
  18 #include "ext_dat.h"
  19
  20 static void *v2i_crld(const X509V3_EXT_METHOD *method,
  21                       X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *nval);
  22 static int i2r_crldp(const X509V3_EXT_METHOD *method, void *pcrldp, BIO *out,
  23                      int indent);
  24
  25 const X509V3_EXT_METHOD v3_crld = {
  26     NID_crl_distribution_points, 0, ASN1_ITEM_ref(CRL_DIST_POINTS),
  27     0, 0, 0, 0,
  28     0, 0,
  29     0,
  30     v2i_crld,
  31     i2r_crldp, 0,
  32     NULL
  33 };
  34
  35 const X509V3_EXT_METHOD v3_freshest_crl = {
  36     NID_freshest_crl, 0, ASN1_ITEM_ref(CRL_DIST_POINTS),
  37     0, 0, 0, 0,
  38     0, 0,
  39     0,
  40     v2i_crld,
  41     i2r_crldp, 0,
  42     NULL
  43 };
  44
  45 static STACK_OF(GENERAL_NAME) *gnames_from_sectname(X509V3_CTX *ctx,
  46                                                     char *sect)
  47 {
  48     STACK_OF(CONF_VALUE) *gnsect;
  49     STACK_OF(GENERAL_NAME) *gens;
  50     if (*sect == '@')
  51         gnsect = X509V3_get_section(ctx, sect + 1);
  52     else
  53         gnsect = X509V3_parse_list(sect);
  54     if (!gnsect) {
  55         X509V3err(X509V3_F_GNAMES_FROM_SECTNAME, X509V3_R_SECTION_NOT_FOUND);
  56         return NULL;
  57     }
  58     gens = v2i_GENERAL_NAMES(NULL, ctx, gnsect);
  59     if (*sect == '@')
  60         X509V3_section_free(ctx, gnsect);
  61     else
  62         sk_CONF_VALUE_pop_free(gnsect, X509V3_conf_free);
  63     return gens;
  64 }
  65
  66 static int set_dist_point_name(DIST_POINT_NAME **pdp, X509V3_CTX *ctx,
  67                                CONF_VALUE *cnf)
  68 {
  69     STACK_OF(GENERAL_NAME) *fnm = NULL;
  70     STACK_OF(X509_NAME_ENTRY) *rnm = NULL;
  71
  72     if (strncmp(cnf->name, "fullname", 9) == 0) {
  73         fnm = gnames_from_sectname(ctx, cnf->value);
  74         if (!fnm)
  75             goto err;
  76     } else if (strcmp(cnf->name, "relativename") == 0) {
  77         int ret;
  78         STACK_OF(CONF_VALUE) *dnsect;
  79         X509_NAME *nm;
  80         nm = X509_NAME_new();
  81         if (nm == NULL)
  82             return -1;
  83         dnsect = X509V3_get_section(ctx, cnf->value);
  84         if (!dnsect) {
  85             X509V3err(X509V3_F_SET_DIST_POINT_NAME,
  86                       X509V3_R_SECTION_NOT_FOUND);
  87             return -1;
  88         }
  89         ret = X509V3_NAME_from_section(nm, dnsect, MBSTRING_ASC);
  90         X509V3_section_free(ctx, dnsect);
  91         rnm = nm->entries;
  92         nm->entries = NULL;
  93         X509_NAME_free(nm);
  94         if (!ret || sk_X509_NAME_ENTRY_num(rnm) <= 0)
  95             goto err;
  96         /*
  97          * Since its a name fragment can't have more than one RDNSequence
  98          */
  99         if (sk_X509_NAME_ENTRY_value(rnm,
 100                                      sk_X509_NAME_ENTRY_num(rnm) - 1)->set) {
 101             X509V3err(X509V3_F_SET_DIST_POINT_NAME,
 102                       X509V3_R_INVALID_MULTIPLE_RDNS);
 103             goto err;
 104         }
 105     } else
 106         return 0;
 107
 108     if (*pdp) {
 109         X509V3err(X509V3_F_SET_DIST_POINT_NAME,
 110                   X509V3_R_DISTPOINT_ALREADY_SET);
 111         goto err;
 112     }
 113
 114     *pdp = DIST_POINT_NAME_new();
 115     if (*pdp == NULL)
 116         goto err;
 117     if (fnm) {
 118         (*pdp)->type = 0;
 119         (*pdp)->name.fullname = fnm;
 120     } else {
 121         (*pdp)->type = 1;
 122         (*pdp)->name.relativename = rnm;
 123     }
 124
 125     return 1;
 126
 127  err:
 128     sk_GENERAL_NAME_pop_free(fnm, GENERAL_NAME_free);
 129     sk_X509_NAME_ENTRY_pop_free(rnm, X509_NAME_ENTRY_free);
 130     return -1;
 131 }
 132
 133 static const BIT_STRING_BITNAME reason_flags[] = {
 134     {0, "Unused", "unused"},
 135     {1, "Key Compromise", "keyCompromise"},
 136     {2, "CA Compromise", "CACompromise"},
 137     {3, "Affiliation Changed", "affiliationChanged"},
 138     {4, "Superseded", "superseded"},
 139     {5, "Cessation Of Operation", "cessationOfOperation"},
 140     {6, "Certificate Hold", "certificateHold"},
 141     {7, "Privilege Withdrawn", "privilegeWithdrawn"},
 142     {8, "AA Compromise", "AACompromise"},
 143     {-1, NULL, NULL}
 144 };
 145
 146 static int set_reasons(ASN1_BIT_STRING **preas, char *value)
 147 {
 148     STACK_OF(CONF_VALUE) *rsk = NULL;
 149     const BIT_STRING_BITNAME *pbn;
 150     const char *bnam;
 151     int i, ret = 0;
 152     rsk = X509V3_parse_list(value);
 153     if (rsk == NULL)
 154         return 0;
 155     if (*preas != NULL)
 156         goto err;
 157     for (i = 0; i < sk_CONF_VALUE_num(rsk); i++) {
 158         bnam = sk_CONF_VALUE_value(rsk, i)->name;
 159         if (*preas == NULL) {
 160             *preas = ASN1_BIT_STRING_new();
 161             if (*preas == NULL)
 162                 goto err;
 163         }
 164         for (pbn = reason_flags; pbn->lname; pbn++) {
 165             if (strcmp(pbn->sname, bnam) == 0) {
 166                 if (!ASN1_BIT_STRING_set_bit(*preas, pbn->bitnum, 1))
 167                     goto err;
 168                 break;
 169             }
 170         }
 171         if (!pbn->lname)
 172             goto err;
 173     }
 174     ret = 1;
 175
 176  err:
 177     sk_CONF_VALUE_pop_free(rsk, X509V3_conf_free);
 178     return ret;
 179 }
 180
 181 static int print_reasons(BIO *out, const char *rname,
 182                          ASN1_BIT_STRING *rflags, int indent)
 183 {
 184     int first = 1;
 185     const BIT_STRING_BITNAME *pbn;
 186     BIO_printf(out, "%*s%s:\n%*s", indent, "", rname, indent + 2, "");
 187     for (pbn = reason_flags; pbn->lname; pbn++) {
 188         if (ASN1_BIT_STRING_get_bit(rflags, pbn->bitnum)) {
 189             if (first)
 190                 first = 0;
 191             else
 192                 BIO_puts(out, ", ");
 193             BIO_puts(out, pbn->lname);
 194         }
 195     }
 196     if (first)
 197         BIO_puts(out, "<EMPTY>\n");
 198     else
 199         BIO_puts(out, "\n");
 200     return 1;
 201 }
 202
 203 static DIST_POINT *crldp_from_section(X509V3_CTX *ctx,
 204                                       STACK_OF(CONF_VALUE) *nval)
 205 {
 206     int i;
 207     CONF_VALUE *cnf;
 208     DIST_POINT *point = DIST_POINT_new();
 209
 210     if (point == NULL)
 211         goto err;
 212     for (i = 0; i < sk_CONF_VALUE_num(nval); i++) {
 213         int ret;
 214         cnf = sk_CONF_VALUE_value(nval, i);
 215         ret = set_dist_point_name(&point->distpoint, ctx, cnf);
 216         if (ret > 0)
 217             continue;
 218         if (ret < 0)
 219             goto err;
 220         if (strcmp(cnf->name, "reasons") == 0) {
 221             if (!set_reasons(&point->reasons, cnf->value))
 222                 goto err;
 223         } else if (strcmp(cnf->name, "CRLissuer") == 0) {
 224             point->CRLissuer = gnames_from_sectname(ctx, cnf->value);
 225             if (!point->CRLissuer)
 226                 goto err;
 227         }
 228     }
 229
 230     return point;
 231
 232  err:
 233     DIST_POINT_free(point);
 234     return NULL;
 235 }
 236
 237 static void *v2i_crld(const X509V3_EXT_METHOD *method,
 238                       X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *nval)
 239 {
 240     STACK_OF(DIST_POINT) *crld;
 241     GENERAL_NAMES *gens = NULL;
 242     GENERAL_NAME *gen = NULL;
 243     CONF_VALUE *cnf;
 244     const int num = sk_CONF_VALUE_num(nval);
 245     int i;
 246
 247     crld = sk_DIST_POINT_new_reserve(NULL, num);
 248     if (crld == NULL)
 249         goto merr;
 250     for (i = 0; i < num; i++) {
 251         DIST_POINT *point;
 252
 253         cnf = sk_CONF_VALUE_value(nval, i);
 254         if (!cnf->value) {
 255             STACK_OF(CONF_VALUE) *dpsect;
 256             dpsect = X509V3_get_section(ctx, cnf->name);
 257             if (!dpsect)
 258                 goto err;
 259             point = crldp_from_section(ctx, dpsect);
 260             X509V3_section_free(ctx, dpsect);
 261             if (!point)
 262                 goto err;
 263             sk_DIST_POINT_push(crld, point); /* no failure as it was reserved */
 264         } else {
 265             if ((gen = v2i_GENERAL_NAME(method, ctx, cnf)) == NULL)
 266                 goto err;
 267             if ((gens = GENERAL_NAMES_new()) == NULL)
 268                 goto merr;
 269             if (!sk_GENERAL_NAME_push(gens, gen))
 270                 goto merr;
 271             gen = NULL;
 272             if ((point = DIST_POINT_new()) == NULL)
 273                 goto merr;
 274             sk_DIST_POINT_push(crld, point); /* no failure as it was reserved */
 275             if ((point->distpoint = DIST_POINT_NAME_new()) == NULL)
 276                 goto merr;
 277             point->distpoint->name.fullname = gens;
 278             point->distpoint->type = 0;
 279             gens = NULL;
 280         }
 281     }
 282     return crld;
 283
 284  merr:
 285     X509V3err(X509V3_F_V2I_CRLD, ERR_R_MALLOC_FAILURE);
 286  err:
 287     GENERAL_NAME_free(gen);
 288     GENERAL_NAMES_free(gens);
 289     sk_DIST_POINT_pop_free(crld, DIST_POINT_free);
 290     return NULL;
 291 }
 292
 293 static int dpn_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
 294                   void *exarg)
 295 {
 296     DIST_POINT_NAME *dpn = (DIST_POINT_NAME *)*pval;
 297
 298     switch (operation) {
 299     case ASN1_OP_NEW_POST:
 300         dpn->dpname = NULL;
 301         break;
 302
 303     case ASN1_OP_FREE_POST:
 304         X509_NAME_free(dpn->dpname);
 305         break;
 306     }
 307     return 1;
 308 }
 309
 310
 311 ASN1_CHOICE_cb(DIST_POINT_NAME, dpn_cb) = {
 312         ASN1_IMP_SEQUENCE_OF(DIST_POINT_NAME, name.fullname, GENERAL_NAME, 0),
 313         ASN1_IMP_SET_OF(DIST_POINT_NAME, name.relativename, X509_NAME_ENTRY, 1)
 314 } ASN1_CHOICE_END_cb(DIST_POINT_NAME, DIST_POINT_NAME, type)
 315
 316
 317 IMPLEMENT_ASN1_FUNCTIONS(DIST_POINT_NAME)
 318
 319 ASN1_SEQUENCE(DIST_POINT) = {
 320         ASN1_EXP_OPT(DIST_POINT, distpoint, DIST_POINT_NAME, 0),
 321         ASN1_IMP_OPT(DIST_POINT, reasons, ASN1_BIT_STRING, 1),
 322         ASN1_IMP_SEQUENCE_OF_OPT(DIST_POINT, CRLissuer, GENERAL_NAME, 2)
 323 } ASN1_SEQUENCE_END(DIST_POINT)
 324
 325 IMPLEMENT_ASN1_FUNCTIONS(DIST_POINT)
 326
 327 ASN1_ITEM_TEMPLATE(CRL_DIST_POINTS) =
 328         ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SEQUENCE_OF, 0, CRLDistributionPoints, DIST_POINT)
 329 ASN1_ITEM_TEMPLATE_END(CRL_DIST_POINTS)
 330
 331 IMPLEMENT_ASN1_FUNCTIONS(CRL_DIST_POINTS)
 332
 333 ASN1_SEQUENCE(ISSUING_DIST_POINT) = {
 334         ASN1_EXP_OPT(ISSUING_DIST_POINT, distpoint, DIST_POINT_NAME, 0),
 335         ASN1_IMP_OPT(ISSUING_DIST_POINT, onlyuser, ASN1_FBOOLEAN, 1),
 336         ASN1_IMP_OPT(ISSUING_DIST_POINT, onlyCA, ASN1_FBOOLEAN, 2),
 337         ASN1_IMP_OPT(ISSUING_DIST_POINT, onlysomereasons, ASN1_BIT_STRING, 3),
 338         ASN1_IMP_OPT(ISSUING_DIST_POINT, indirectCRL, ASN1_FBOOLEAN, 4),
 339         ASN1_IMP_OPT(ISSUING_DIST_POINT, onlyattr, ASN1_FBOOLEAN, 5)
 340 } ASN1_SEQUENCE_END(ISSUING_DIST_POINT)
 341
 342 IMPLEMENT_ASN1_FUNCTIONS(ISSUING_DIST_POINT)
 343
 344 static int i2r_idp(const X509V3_EXT_METHOD *method, void *pidp, BIO *out,
 345                    int indent);
 346 static void *v2i_idp(const X509V3_EXT_METHOD *method, X509V3_CTX *ctx,
 347                      STACK_OF(CONF_VALUE) *nval);
 348
 349 const X509V3_EXT_METHOD v3_idp = {
 350     NID_issuing_distribution_point, X509V3_EXT_MULTILINE,
 351     ASN1_ITEM_ref(ISSUING_DIST_POINT),
 352     0, 0, 0, 0,
 353     0, 0,
 354     0,
 355     v2i_idp,
 356     i2r_idp, 0,
 357     NULL
 358 };
 359
 360 static void *v2i_idp(const X509V3_EXT_METHOD *method, X509V3_CTX *ctx,
 361                      STACK_OF(CONF_VALUE) *nval)
 362 {
 363     ISSUING_DIST_POINT *idp = NULL;
 364     CONF_VALUE *cnf;
 365     char *name, *val;
 366     int i, ret;
 367     idp = ISSUING_DIST_POINT_new();
 368     if (idp == NULL)
 369         goto merr;
 370     for (i = 0; i < sk_CONF_VALUE_num(nval); i++) {
 371         cnf = sk_CONF_VALUE_value(nval, i);
 372         name = cnf->name;
 373         val = cnf->value;
 374         ret = set_dist_point_name(&idp->distpoint, ctx, cnf);
 375         if (ret > 0)
 376             continue;
 377         if (ret < 0)
 378             goto err;
 379         if (strcmp(name, "onlyuser") == 0) {
 380             if (!X509V3_get_value_bool(cnf, &idp->onlyuser))
 381                 goto err;
 382         } else if (strcmp(name, "onlyCA") == 0) {
 383             if (!X509V3_get_value_bool(cnf, &idp->onlyCA))
 384                 goto err;
 385         } else if (strcmp(name, "onlyAA") == 0) {
 386             if (!X509V3_get_value_bool(cnf, &idp->onlyattr))
 387                 goto err;
 388         } else if (strcmp(name, "indirectCRL") == 0) {
 389             if (!X509V3_get_value_bool(cnf, &idp->indirectCRL))
 390                 goto err;
 391         } else if (strcmp(name, "onlysomereasons") == 0) {
 392             if (!set_reasons(&idp->onlysomereasons, val))
 393                 goto err;
 394         } else {
 395             X509V3err(X509V3_F_V2I_IDP, X509V3_R_INVALID_NAME);
 396             X509V3_conf_err(cnf);
 397             goto err;
 398         }
 399     }
 400     return idp;
 401
 402  merr:
 403     X509V3err(X509V3_F_V2I_IDP, ERR_R_MALLOC_FAILURE);
 404  err:
 405     ISSUING_DIST_POINT_free(idp);
 406     return NULL;
 407 }
 408
 409 static int print_gens(BIO *out, STACK_OF(GENERAL_NAME) *gens, int indent)
 410 {
 411     int i;
 412     for (i = 0; i < sk_GENERAL_NAME_num(gens); i++) {
 413         if (i > 0)
 414             BIO_puts(out, "\n");
 415         BIO_printf(out, "%*s", indent + 2, "");
 416         GENERAL_NAME_print(out, sk_GENERAL_NAME_value(gens, i));
 417     }
 418     return 1;
 419 }
 420
 421 static int print_distpoint(BIO *out, DIST_POINT_NAME *dpn, int indent)
 422 {
 423     if (dpn->type == 0) {
 424         BIO_printf(out, "%*sFull Name:\n", indent, "");
 425         print_gens(out, dpn->name.fullname, indent);
 426     } else {
 427         X509_NAME ntmp;
 428         ntmp.entries = dpn->name.relativename;
 429         BIO_printf(out, "%*sRelative Name:\n%*s", indent, "", indent + 2, "");
 430         X509_NAME_print_ex(out, &ntmp, 0, XN_FLAG_ONELINE);
 431         BIO_puts(out, "\n");
 432     }
 433     return 1;
 434 }
 435
 436 static int i2r_idp(const X509V3_EXT_METHOD *method, void *pidp, BIO *out,
 437                    int indent)
 438 {
 439     ISSUING_DIST_POINT *idp = pidp;
 440     if (idp->distpoint)
 441         print_distpoint(out, idp->distpoint, indent);
 442     if (idp->onlyuser > 0)
 443         BIO_printf(out, "%*sOnly User Certificates\n", indent, "");
 444     if (idp->onlyCA > 0)
 445         BIO_printf(out, "%*sOnly CA Certificates\n", indent, "");
 446     if (idp->indirectCRL > 0)
 447         BIO_printf(out, "%*sIndirect CRL\n", indent, "");
 448     if (idp->onlysomereasons)
 449         print_reasons(out, "Only Some Reasons", idp->onlysomereasons, indent);
 450     if (idp->onlyattr > 0)
 451         BIO_printf(out, "%*sOnly Attribute Certificates\n", indent, "");
 452     if (!idp->distpoint && (idp->onlyuser <= 0) && (idp->onlyCA <= 0)
 453         && (idp->indirectCRL <= 0) && !idp->onlysomereasons
 454         && (idp->onlyattr <= 0))
 455         BIO_printf(out, "%*s<EMPTY>\n", indent, "");
 456
 457     return 1;
 458 }
 459
 460 static int i2r_crldp(const X509V3_EXT_METHOD *method, void *pcrldp, BIO *out,
 461                      int indent)
 462 {
 463     STACK_OF(DIST_POINT) *crld = pcrldp;
 464     DIST_POINT *point;
 465     int i;
 466     for (i = 0; i < sk_DIST_POINT_num(crld); i++) {
 467         if (i > 0)
 468             BIO_puts(out, "\n");
 469         point = sk_DIST_POINT_value(crld, i);
 470         if (point->distpoint)
 471             print_distpoint(out, point->distpoint, indent);
 472         if (point->reasons)
 473             print_reasons(out, "Reasons", point->reasons, indent);
 474         if (point->CRLissuer) {
 475             BIO_printf(out, "%*sCRL Issuer:\n", indent, "");
 476             print_gens(out, point->CRLissuer, indent);
 477         }
 478     }
 479     return 1;
 480 }
 481
 482 int DIST_POINT_set_dpname(DIST_POINT_NAME *dpn, X509_NAME *iname)
 483 {
 484     int i;
 485     STACK_OF(X509_NAME_ENTRY) *frag;
 486     X509_NAME_ENTRY *ne;
 487     if (!dpn || (dpn->type != 1))
 488         return 1;
 489     frag = dpn->name.relativename;
 490     dpn->dpname = X509_NAME_dup(iname);
 491     if (!dpn->dpname)
 492         return 0;
 493     for (i = 0; i < sk_X509_NAME_ENTRY_num(frag); i++) {
 494         ne = sk_X509_NAME_ENTRY_value(frag, i);
 495         if (!X509_NAME_add_entry(dpn->dpname, ne, -1, i ? 0 : 1)) {
 496             X509_NAME_free(dpn->dpname);
 497             dpn->dpname = NULL;
 498             return 0;
 499         }
 500     }
 501     /* generate cached encoding of name */
 502     if (i2d_X509_NAME(dpn->dpname, NULL) < 0) {
 503         X509_NAME_free(dpn->dpname);
 504         dpn->dpname = NULL;
 505         return 0;
 506     }
 507     return 1;
 508 }