crypto/x509v3/v3_crld.c

   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
  67 #include "internal/x509_int.h"
  68
  69 static void *v2i_crld(const X509V3_EXT_METHOD *method,
  70                       X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *nval);
  71 static int i2r_crldp(const X509V3_EXT_METHOD *method, void *pcrldp, BIO *out,
  72                      int indent);
  73
  74 const X509V3_EXT_METHOD v3_crld = {
  75     NID_crl_distribution_points, 0, ASN1_ITEM_ref(CRL_DIST_POINTS),
  76     0, 0, 0, 0,
  77     0, 0,
  78     0,
  79     v2i_crld,
  80     i2r_crldp, 0,
  81     NULL
  82 };
  83
  84 const X509V3_EXT_METHOD v3_freshest_crl = {
  85     NID_freshest_crl, 0, ASN1_ITEM_ref(CRL_DIST_POINTS),
  86     0, 0, 0, 0,
  87     0, 0,
  88     0,
  89     v2i_crld,
  90     i2r_crldp, 0,
  91     NULL
  92 };
  93
  94 static STACK_OF(GENERAL_NAME) *gnames_from_sectname(X509V3_CTX *ctx,
  95                                                     char *sect)
  96 {
  97     STACK_OF(CONF_VALUE) *gnsect;
  98     STACK_OF(GENERAL_NAME) *gens;
  99     if (*sect == '@')
 100         gnsect = X509V3_get_section(ctx, sect + 1);
 101     else
 102         gnsect = X509V3_parse_list(sect);
 103     if (!gnsect) {
 104         X509V3err(X509V3_F_GNAMES_FROM_SECTNAME, X509V3_R_SECTION_NOT_FOUND);
 105         return NULL;
 106     }
 107     gens = v2i_GENERAL_NAMES(NULL, ctx, gnsect);
 108     if (*sect == '@')
 109         X509V3_section_free(ctx, gnsect);
 110     else
 111         sk_CONF_VALUE_pop_free(gnsect, X509V3_conf_free);
 112     return gens;
 113 }
 114
 115 static int set_dist_point_name(DIST_POINT_NAME **pdp, X509V3_CTX *ctx,
 116                                CONF_VALUE *cnf)
 117 {
 118     STACK_OF(GENERAL_NAME) *fnm = NULL;
 119     STACK_OF(X509_NAME_ENTRY) *rnm = NULL;
 120
 121     if (strncmp(cnf->name, "fullname", 9) == 0) {
 122         fnm = gnames_from_sectname(ctx, cnf->value);
 123         if (!fnm)
 124             goto err;
 125     } else if (strcmp(cnf->name, "relativename") == 0) {
 126         int ret;
 127         STACK_OF(CONF_VALUE) *dnsect;
 128         X509_NAME *nm;
 129         nm = X509_NAME_new();
 130         if (!nm)
 131             return -1;
 132         dnsect = X509V3_get_section(ctx, cnf->value);
 133         if (!dnsect) {
 134             X509V3err(X509V3_F_SET_DIST_POINT_NAME,
 135                       X509V3_R_SECTION_NOT_FOUND);
 136             return -1;
 137         }
 138         ret = X509V3_NAME_from_section(nm, dnsect, MBSTRING_ASC);
 139         X509V3_section_free(ctx, dnsect);
 140         rnm = nm->entries;
 141         nm->entries = NULL;
 142         X509_NAME_free(nm);
 143         if (!ret || sk_X509_NAME_ENTRY_num(rnm) <= 0)
 144             goto err;
 145         /*
 146          * Since its a name fragment can't have more than one RDNSequence
 147          */
 148         if (sk_X509_NAME_ENTRY_value(rnm,
 149                                      sk_X509_NAME_ENTRY_num(rnm) - 1)->set) {
 150             X509V3err(X509V3_F_SET_DIST_POINT_NAME,
 151                       X509V3_R_INVALID_MULTIPLE_RDNS);
 152             goto err;
 153         }
 154     } else
 155         return 0;
 156
 157     if (*pdp) {
 158         X509V3err(X509V3_F_SET_DIST_POINT_NAME,
 159                   X509V3_R_DISTPOINT_ALREADY_SET);
 160         goto err;
 161     }
 162
 163     *pdp = DIST_POINT_NAME_new();
 164     if (!*pdp)
 165         goto err;
 166     if (fnm) {
 167         (*pdp)->type = 0;
 168         (*pdp)->name.fullname = fnm;
 169     } else {
 170         (*pdp)->type = 1;
 171         (*pdp)->name.relativename = rnm;
 172     }
 173
 174     return 1;
 175
 176  err:
 177     sk_GENERAL_NAME_pop_free(fnm, GENERAL_NAME_free);
 178     sk_X509_NAME_ENTRY_pop_free(rnm, X509_NAME_ENTRY_free);
 179     return -1;
 180 }
 181
 182 static const BIT_STRING_BITNAME reason_flags[] = {
 183     {0, "Unused", "unused"},
 184     {1, "Key Compromise", "keyCompromise"},
 185     {2, "CA Compromise", "CACompromise"},
 186     {3, "Affiliation Changed", "affiliationChanged"},
 187     {4, "Superseded", "superseded"},
 188     {5, "Cessation Of Operation", "cessationOfOperation"},
 189     {6, "Certificate Hold", "certificateHold"},
 190     {7, "Privilege Withdrawn", "privilegeWithdrawn"},
 191     {8, "AA Compromise", "AACompromise"},
 192     {-1, NULL, NULL}
 193 };
 194
 195 static int set_reasons(ASN1_BIT_STRING **preas, char *value)
 196 {
 197     STACK_OF(CONF_VALUE) *rsk = NULL;
 198     const BIT_STRING_BITNAME *pbn;
 199     const char *bnam;
 200     int i, ret = 0;
 201     rsk = X509V3_parse_list(value);
 202     if (!rsk)
 203         return 0;
 204     if (*preas)
 205         return 0;
 206     for (i = 0; i < sk_CONF_VALUE_num(rsk); i++) {
 207         bnam = sk_CONF_VALUE_value(rsk, i)->name;
 208         if (!*preas) {
 209             *preas = ASN1_BIT_STRING_new();
 210             if (!*preas)
 211                 goto err;
 212         }
 213         for (pbn = reason_flags; pbn->lname; pbn++) {
 214             if (strcmp(pbn->sname, bnam) == 0) {
 215                 if (!ASN1_BIT_STRING_set_bit(*preas, pbn->bitnum, 1))
 216                     goto err;
 217                 break;
 218             }
 219         }
 220         if (!pbn->lname)
 221             goto err;
 222     }
 223     ret = 1;
 224
 225  err:
 226     sk_CONF_VALUE_pop_free(rsk, X509V3_conf_free);
 227     return ret;
 228 }
 229
 230 static int print_reasons(BIO *out, const char *rname,
 231                          ASN1_BIT_STRING *rflags, int indent)
 232 {
 233     int first = 1;
 234     const BIT_STRING_BITNAME *pbn;
 235     BIO_printf(out, "%*s%s:\n%*s", indent, "", rname, indent + 2, "");
 236     for (pbn = reason_flags; pbn->lname; pbn++) {
 237         if (ASN1_BIT_STRING_get_bit(rflags, pbn->bitnum)) {
 238             if (first)
 239                 first = 0;
 240             else
 241                 BIO_puts(out, ", ");
 242             BIO_puts(out, pbn->lname);
 243         }
 244     }
 245     if (first)
 246         BIO_puts(out, "<EMPTY>\n");
 247     else
 248         BIO_puts(out, "\n");
 249     return 1;
 250 }
 251
 252 static DIST_POINT *crldp_from_section(X509V3_CTX *ctx,
 253                                       STACK_OF(CONF_VALUE) *nval)
 254 {
 255     int i;
 256     CONF_VALUE *cnf;
 257     DIST_POINT *point = NULL;
 258     point = DIST_POINT_new();
 259     if (!point)
 260         goto err;
 261     for (i = 0; i < sk_CONF_VALUE_num(nval); i++) {
 262         int ret;
 263         cnf = sk_CONF_VALUE_value(nval, i);
 264         ret = set_dist_point_name(&point->distpoint, ctx, cnf);
 265         if (ret > 0)
 266             continue;
 267         if (ret < 0)
 268             goto err;
 269         if (strcmp(cnf->name, "reasons") == 0) {
 270             if (!set_reasons(&point->reasons, cnf->value))
 271                 goto err;
 272         } else if (strcmp(cnf->name, "CRLissuer") == 0) {
 273             point->CRLissuer = gnames_from_sectname(ctx, cnf->value);
 274             if (!point->CRLissuer)
 275                 goto err;
 276         }
 277     }
 278
 279     return point;
 280
 281  err:
 282     DIST_POINT_free(point);
 283     return NULL;
 284 }
 285
 286 static 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
 344 static int dpn_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
 345                   void *exarg)
 346 {
 347     DIST_POINT_NAME *dpn = (DIST_POINT_NAME *)*pval;
 348
 349     switch (operation) {
 350     case ASN1_OP_NEW_POST:
 351         dpn->dpname = NULL;
 352         break;
 353
 354     case ASN1_OP_FREE_POST:
 355         X509_NAME_free(dpn->dpname);
 356         break;
 357     }
 358     return 1;
 359 }
 360
 361
 362 ASN1_CHOICE_cb(DIST_POINT_NAME, dpn_cb) = {
 363         ASN1_IMP_SEQUENCE_OF(DIST_POINT_NAME, name.fullname, GENERAL_NAME, 0),
 364         ASN1_IMP_SET_OF(DIST_POINT_NAME, name.relativename, X509_NAME_ENTRY, 1)
 365 } ASN1_CHOICE_END_cb(DIST_POINT_NAME, DIST_POINT_NAME, type)
 366
 367
 368 IMPLEMENT_ASN1_FUNCTIONS(DIST_POINT_NAME)
 369
 370 ASN1_SEQUENCE(DIST_POINT) = {
 371         ASN1_EXP_OPT(DIST_POINT, distpoint, DIST_POINT_NAME, 0),
 372         ASN1_IMP_OPT(DIST_POINT, reasons, ASN1_BIT_STRING, 1),
 373         ASN1_IMP_SEQUENCE_OF_OPT(DIST_POINT, CRLissuer, GENERAL_NAME, 2)
 374 } ASN1_SEQUENCE_END(DIST_POINT)
 375
 376 IMPLEMENT_ASN1_FUNCTIONS(DIST_POINT)
 377
 378 ASN1_ITEM_TEMPLATE(CRL_DIST_POINTS) =
 379         ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SEQUENCE_OF, 0, CRLDistributionPoints, DIST_POINT)
 380 ASN1_ITEM_TEMPLATE_END(CRL_DIST_POINTS)
 381
 382 IMPLEMENT_ASN1_FUNCTIONS(CRL_DIST_POINTS)
 383
 384 ASN1_SEQUENCE(ISSUING_DIST_POINT) = {
 385         ASN1_EXP_OPT(ISSUING_DIST_POINT, distpoint, DIST_POINT_NAME, 0),
 386         ASN1_IMP_OPT(ISSUING_DIST_POINT, onlyuser, ASN1_FBOOLEAN, 1),
 387         ASN1_IMP_OPT(ISSUING_DIST_POINT, onlyCA, ASN1_FBOOLEAN, 2),
 388         ASN1_IMP_OPT(ISSUING_DIST_POINT, onlysomereasons, ASN1_BIT_STRING, 3),
 389         ASN1_IMP_OPT(ISSUING_DIST_POINT, indirectCRL, ASN1_FBOOLEAN, 4),
 390         ASN1_IMP_OPT(ISSUING_DIST_POINT, onlyattr, ASN1_FBOOLEAN, 5)
 391 } ASN1_SEQUENCE_END(ISSUING_DIST_POINT)
 392
 393 IMPLEMENT_ASN1_FUNCTIONS(ISSUING_DIST_POINT)
 394
 395 static int i2r_idp(const X509V3_EXT_METHOD *method, void *pidp, BIO *out,
 396                    int indent);
 397 static void *v2i_idp(const X509V3_EXT_METHOD *method, X509V3_CTX *ctx,
 398                      STACK_OF(CONF_VALUE) *nval);
 399
 400 const X509V3_EXT_METHOD v3_idp = {
 401     NID_issuing_distribution_point, X509V3_EXT_MULTILINE,
 402     ASN1_ITEM_ref(ISSUING_DIST_POINT),
 403     0, 0, 0, 0,
 404     0, 0,
 405     0,
 406     v2i_idp,
 407     i2r_idp, 0,
 408     NULL
 409 };
 410
 411 static void *v2i_idp(const X509V3_EXT_METHOD *method, X509V3_CTX *ctx,
 412                      STACK_OF(CONF_VALUE) *nval)
 413 {
 414     ISSUING_DIST_POINT *idp = NULL;
 415     CONF_VALUE *cnf;
 416     char *name, *val;
 417     int i, ret;
 418     idp = ISSUING_DIST_POINT_new();
 419     if (!idp)
 420         goto merr;
 421     for (i = 0; i < sk_CONF_VALUE_num(nval); i++) {
 422         cnf = sk_CONF_VALUE_value(nval, i);
 423         name = cnf->name;
 424         val = cnf->value;
 425         ret = set_dist_point_name(&idp->distpoint, ctx, cnf);
 426         if (ret > 0)
 427             continue;
 428         if (ret < 0)
 429             goto err;
 430         if (strcmp(name, "onlyuser") == 0) {
 431             if (!X509V3_get_value_bool(cnf, &idp->onlyuser))
 432                 goto err;
 433         } else if (strcmp(name, "onlyCA") == 0) {
 434             if (!X509V3_get_value_bool(cnf, &idp->onlyCA))
 435                 goto err;
 436         } else if (strcmp(name, "onlyAA") == 0) {
 437             if (!X509V3_get_value_bool(cnf, &idp->onlyattr))
 438                 goto err;
 439         } else if (strcmp(name, "indirectCRL") == 0) {
 440             if (!X509V3_get_value_bool(cnf, &idp->indirectCRL))
 441                 goto err;
 442         } else if (strcmp(name, "onlysomereasons") == 0) {
 443             if (!set_reasons(&idp->onlysomereasons, val))
 444                 goto err;
 445         } else {
 446             X509V3err(X509V3_F_V2I_IDP, X509V3_R_INVALID_NAME);
 447             X509V3_conf_err(cnf);
 448             goto err;
 449         }
 450     }
 451     return idp;
 452
 453  merr:
 454     X509V3err(X509V3_F_V2I_IDP, ERR_R_MALLOC_FAILURE);
 455  err:
 456     ISSUING_DIST_POINT_free(idp);
 457     return NULL;
 458 }
 459
 460 static int print_gens(BIO *out, STACK_OF(GENERAL_NAME) *gens, int indent)
 461 {
 462     int i;
 463     for (i = 0; i < sk_GENERAL_NAME_num(gens); i++) {
 464         BIO_printf(out, "%*s", indent + 2, "");
 465         GENERAL_NAME_print(out, sk_GENERAL_NAME_value(gens, i));
 466         BIO_puts(out, "\n");
 467     }
 468     return 1;
 469 }
 470
 471 static int print_distpoint(BIO *out, DIST_POINT_NAME *dpn, int indent)
 472 {
 473     if (dpn->type == 0) {
 474         BIO_printf(out, "%*sFull Name:\n", indent, "");
 475         print_gens(out, dpn->name.fullname, indent);
 476     } else {
 477         X509_NAME ntmp;
 478         ntmp.entries = dpn->name.relativename;
 479         BIO_printf(out, "%*sRelative Name:\n%*s", indent, "", indent + 2, "");
 480         X509_NAME_print_ex(out, &ntmp, 0, XN_FLAG_ONELINE);
 481         BIO_puts(out, "\n");
 482     }
 483     return 1;
 484 }
 485
 486 static int i2r_idp(const X509V3_EXT_METHOD *method, void *pidp, BIO *out,
 487                    int indent)
 488 {
 489     ISSUING_DIST_POINT *idp = pidp;
 490     if (idp->distpoint)
 491         print_distpoint(out, idp->distpoint, indent);
 492     if (idp->onlyuser > 0)
 493         BIO_printf(out, "%*sOnly User Certificates\n", indent, "");
 494     if (idp->onlyCA > 0)
 495         BIO_printf(out, "%*sOnly CA Certificates\n", indent, "");
 496     if (idp->indirectCRL > 0)
 497         BIO_printf(out, "%*sIndirect CRL\n", indent, "");
 498     if (idp->onlysomereasons)
 499         print_reasons(out, "Only Some Reasons", idp->onlysomereasons, indent);
 500     if (idp->onlyattr > 0)
 501         BIO_printf(out, "%*sOnly Attribute Certificates\n", indent, "");
 502     if (!idp->distpoint && (idp->onlyuser <= 0) && (idp->onlyCA <= 0)
 503         && (idp->indirectCRL <= 0) && !idp->onlysomereasons
 504         && (idp->onlyattr <= 0))
 505         BIO_printf(out, "%*s<EMPTY>\n", indent, "");
 506
 507     return 1;
 508 }
 509
 510 static int i2r_crldp(const X509V3_EXT_METHOD *method, void *pcrldp, BIO *out,
 511                      int indent)
 512 {
 513     STACK_OF(DIST_POINT) *crld = pcrldp;
 514     DIST_POINT *point;
 515     int i;
 516     for (i = 0; i < sk_DIST_POINT_num(crld); i++) {
 517         BIO_puts(out, "\n");
 518         point = sk_DIST_POINT_value(crld, i);
 519         if (point->distpoint)
 520             print_distpoint(out, point->distpoint, indent);
 521         if (point->reasons)
 522             print_reasons(out, "Reasons", point->reasons, indent);
 523         if (point->CRLissuer) {
 524             BIO_printf(out, "%*sCRL Issuer:\n", indent, "");
 525             print_gens(out, point->CRLissuer, indent);
 526         }
 527     }
 528     return 1;
 529 }
 530
 531 int DIST_POINT_set_dpname(DIST_POINT_NAME *dpn, X509_NAME *iname)
 532 {
 533     int i;
 534     STACK_OF(X509_NAME_ENTRY) *frag;
 535     X509_NAME_ENTRY *ne;
 536     if (!dpn || (dpn->type != 1))
 537         return 1;
 538     frag = dpn->name.relativename;
 539     dpn->dpname = X509_NAME_dup(iname);
 540     if (!dpn->dpname)
 541         return 0;
 542     for (i = 0; i < sk_X509_NAME_ENTRY_num(frag); i++) {
 543         ne = sk_X509_NAME_ENTRY_value(frag, i);
 544         if (!X509_NAME_add_entry(dpn->dpname, ne, -1, i ? 0 : 1)) {
 545             X509_NAME_free(dpn->dpname);
 546             dpn->dpname = NULL;
 547             return 0;
 548         }
 549     }
 550     /* generate cached encoding of name */
 551     if (i2d_X509_NAME(dpn->dpname, NULL) < 0) {
 552         X509_NAME_free(dpn->dpname);
 553         dpn->dpname = NULL;
 554         return 0;
 555     }
 556     return 1;
 557 }