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     if (!strncmp(cnf->name, "fullname", 9)) {
 121         fnm = gnames_from_sectname(ctx, cnf->value);
 122         if (!fnm)
 123             goto err;
 124     } else if (!strcmp(cnf->name, "relativename")) {
 125         int ret;
 126         STACK_OF(CONF_VALUE) *dnsect;
 127         X509_NAME *nm;
 128         nm = X509_NAME_new();
 129         if (!nm)
 130             return -1;
 131         dnsect = X509V3_get_section(ctx, cnf->value);
 132         if (!dnsect) {
 133             X509V3err(X509V3_F_SET_DIST_POINT_NAME,
 134                       X509V3_R_SECTION_NOT_FOUND);
 135             return -1;
 136         }
 137         ret = X509V3_NAME_from_section(nm, dnsect, MBSTRING_ASC);
 138         X509V3_section_free(ctx, dnsect);
 139         rnm = nm->entries;
 140         nm->entries = NULL;
 141         X509_NAME_free(nm);
 142         if (!ret || sk_X509_NAME_ENTRY_num(rnm) <= 0)
 143             goto err;
 144         /*
 145          * Since its a name fragment can't have more than one RDNSequence
 146          */
 147         if (sk_X509_NAME_ENTRY_value(rnm,
 148                                      sk_X509_NAME_ENTRY_num(rnm) - 1)->set) {
 149             X509V3err(X509V3_F_SET_DIST_POINT_NAME,
 150                       X509V3_R_INVALID_MULTIPLE_RDNS);
 151             goto err;
 152         }
 153     } else
 154         return 0;
 155
 156     if (*pdp) {
 157         X509V3err(X509V3_F_SET_DIST_POINT_NAME,
 158                   X509V3_R_DISTPOINT_ALREADY_SET);
 159         goto err;
 160     }
 161
 162     *pdp = DIST_POINT_NAME_new();
 163     if (!*pdp)
 164         goto err;
 165     if (fnm) {
 166         (*pdp)->type = 0;
 167         (*pdp)->name.fullname = fnm;
 168     } else {
 169         (*pdp)->type = 1;
 170         (*pdp)->name.relativename = rnm;
 171     }
 172
 173     return 1;
 174
 175  err:
 176     sk_GENERAL_NAME_pop_free(fnm, GENERAL_NAME_free);
 177     sk_X509_NAME_ENTRY_pop_free(rnm, X509_NAME_ENTRY_free);
 178     return -1;
 179 }
 180
 181 static 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
 194 static 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
 229 static 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
 251 static 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     DIST_POINT_free(point);
 282     return NULL;
 283 }
 284
 285 static void *v2i_crld(const X509V3_EXT_METHOD *method,
 286                       X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *nval)
 287 {
 288     STACK_OF(DIST_POINT) *crld = NULL;
 289     GENERAL_NAMES *gens = NULL;
 290     GENERAL_NAME *gen = NULL;
 291     CONF_VALUE *cnf;
 292     int i;
 293     if (!(crld = sk_DIST_POINT_new_null()))
 294         goto merr;
 295     for (i = 0; i < sk_CONF_VALUE_num(nval); i++) {
 296         DIST_POINT *point;
 297         cnf = sk_CONF_VALUE_value(nval, i);
 298         if (!cnf->value) {
 299             STACK_OF(CONF_VALUE) *dpsect;
 300             dpsect = X509V3_get_section(ctx, cnf->name);
 301             if (!dpsect)
 302                 goto err;
 303             point = crldp_from_section(ctx, dpsect);
 304             X509V3_section_free(ctx, dpsect);
 305             if (!point)
 306                 goto err;
 307             if (!sk_DIST_POINT_push(crld, point)) {
 308                 DIST_POINT_free(point);
 309                 goto merr;
 310             }
 311         } else {
 312             if (!(gen = v2i_GENERAL_NAME(method, ctx, cnf)))
 313                 goto err;
 314             if (!(gens = GENERAL_NAMES_new()))
 315                 goto merr;
 316             if (!sk_GENERAL_NAME_push(gens, gen))
 317                 goto merr;
 318             gen = NULL;
 319             if (!(point = DIST_POINT_new()))
 320                 goto merr;
 321             if (!sk_DIST_POINT_push(crld, point)) {
 322                 DIST_POINT_free(point);
 323                 goto merr;
 324             }
 325             if (!(point->distpoint = DIST_POINT_NAME_new()))
 326                 goto merr;
 327             point->distpoint->name.fullname = gens;
 328             point->distpoint->type = 0;
 329             gens = NULL;
 330         }
 331     }
 332     return crld;
 333
 334  merr:
 335     X509V3err(X509V3_F_V2I_CRLD, ERR_R_MALLOC_FAILURE);
 336  err:
 337     GENERAL_NAME_free(gen);
 338     GENERAL_NAMES_free(gens);
 339     sk_DIST_POINT_pop_free(crld, DIST_POINT_free);
 340     return NULL;
 341 }
 342
 343 static int dpn_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
 344                   void *exarg)
 345 {
 346     DIST_POINT_NAME *dpn = (DIST_POINT_NAME *)*pval;
 347
 348     switch (operation) {
 349     case ASN1_OP_NEW_POST:
 350         dpn->dpname = NULL;
 351         break;
 352
 353     case ASN1_OP_FREE_POST:
 354         X509_NAME_free(dpn->dpname);
 355         break;
 356     }
 357     return 1;
 358 }
 359
 360
 361 ASN1_CHOICE_cb(DIST_POINT_NAME, dpn_cb) = {
 362         ASN1_IMP_SEQUENCE_OF(DIST_POINT_NAME, name.fullname, GENERAL_NAME, 0),
 363         ASN1_IMP_SET_OF(DIST_POINT_NAME, name.relativename, X509_NAME_ENTRY, 1)
 364 } ASN1_CHOICE_END_cb(DIST_POINT_NAME, DIST_POINT_NAME, type)
 365
 366
 367 IMPLEMENT_ASN1_FUNCTIONS(DIST_POINT_NAME)
 368
 369 ASN1_SEQUENCE(DIST_POINT) = {
 370         ASN1_EXP_OPT(DIST_POINT, distpoint, DIST_POINT_NAME, 0),
 371         ASN1_IMP_OPT(DIST_POINT, reasons, ASN1_BIT_STRING, 1),
 372         ASN1_IMP_SEQUENCE_OF_OPT(DIST_POINT, CRLissuer, GENERAL_NAME, 2)
 373 } ASN1_SEQUENCE_END(DIST_POINT)
 374
 375 IMPLEMENT_ASN1_FUNCTIONS(DIST_POINT)
 376
 377 ASN1_ITEM_TEMPLATE(CRL_DIST_POINTS) =
 378         ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SEQUENCE_OF, 0, CRLDistributionPoints, DIST_POINT)
 379 ASN1_ITEM_TEMPLATE_END(CRL_DIST_POINTS)
 380
 381 IMPLEMENT_ASN1_FUNCTIONS(CRL_DIST_POINTS)
 382
 383 ASN1_SEQUENCE(ISSUING_DIST_POINT) = {
 384         ASN1_EXP_OPT(ISSUING_DIST_POINT, distpoint, DIST_POINT_NAME, 0),
 385         ASN1_IMP_OPT(ISSUING_DIST_POINT, onlyuser, ASN1_FBOOLEAN, 1),
 386         ASN1_IMP_OPT(ISSUING_DIST_POINT, onlyCA, ASN1_FBOOLEAN, 2),
 387         ASN1_IMP_OPT(ISSUING_DIST_POINT, onlysomereasons, ASN1_BIT_STRING, 3),
 388         ASN1_IMP_OPT(ISSUING_DIST_POINT, indirectCRL, ASN1_FBOOLEAN, 4),
 389         ASN1_IMP_OPT(ISSUING_DIST_POINT, onlyattr, ASN1_FBOOLEAN, 5)
 390 } ASN1_SEQUENCE_END(ISSUING_DIST_POINT)
 391
 392 IMPLEMENT_ASN1_FUNCTIONS(ISSUING_DIST_POINT)
 393
 394 static int i2r_idp(const X509V3_EXT_METHOD *method, void *pidp, BIO *out,
 395                    int indent);
 396 static void *v2i_idp(const X509V3_EXT_METHOD *method, X509V3_CTX *ctx,
 397                      STACK_OF(CONF_VALUE) *nval);
 398
 399 const X509V3_EXT_METHOD v3_idp = {
 400     NID_issuing_distribution_point, X509V3_EXT_MULTILINE,
 401     ASN1_ITEM_ref(ISSUING_DIST_POINT),
 402     0, 0, 0, 0,
 403     0, 0,
 404     0,
 405     v2i_idp,
 406     i2r_idp, 0,
 407     NULL
 408 };
 409
 410 static void *v2i_idp(const X509V3_EXT_METHOD *method, X509V3_CTX *ctx,
 411                      STACK_OF(CONF_VALUE) *nval)
 412 {
 413     ISSUING_DIST_POINT *idp = NULL;
 414     CONF_VALUE *cnf;
 415     char *name, *val;
 416     int i, ret;
 417     idp = ISSUING_DIST_POINT_new();
 418     if (!idp)
 419         goto merr;
 420     for (i = 0; i < sk_CONF_VALUE_num(nval); i++) {
 421         cnf = sk_CONF_VALUE_value(nval, i);
 422         name = cnf->name;
 423         val = cnf->value;
 424         ret = set_dist_point_name(&idp->distpoint, ctx, cnf);
 425         if (ret > 0)
 426             continue;
 427         if (ret < 0)
 428             goto err;
 429         if (!strcmp(name, "onlyuser")) {
 430             if (!X509V3_get_value_bool(cnf, &idp->onlyuser))
 431                 goto err;
 432         } else if (!strcmp(name, "onlyCA")) {
 433             if (!X509V3_get_value_bool(cnf, &idp->onlyCA))
 434                 goto err;
 435         } else if (!strcmp(name, "onlyAA")) {
 436             if (!X509V3_get_value_bool(cnf, &idp->onlyattr))
 437                 goto err;
 438         } else if (!strcmp(name, "indirectCRL")) {
 439             if (!X509V3_get_value_bool(cnf, &idp->indirectCRL))
 440                 goto err;
 441         } else if (!strcmp(name, "onlysomereasons")) {
 442             if (!set_reasons(&idp->onlysomereasons, val))
 443                 goto err;
 444         } else {
 445             X509V3err(X509V3_F_V2I_IDP, X509V3_R_INVALID_NAME);
 446             X509V3_conf_err(cnf);
 447             goto err;
 448         }
 449     }
 450     return idp;
 451
 452  merr:
 453     X509V3err(X509V3_F_V2I_IDP, ERR_R_MALLOC_FAILURE);
 454  err:
 455     ISSUING_DIST_POINT_free(idp);
 456     return NULL;
 457 }
 458
 459 static int print_gens(BIO *out, STACK_OF(GENERAL_NAME) *gens, int indent)
 460 {
 461     int i;
 462     for (i = 0; i < sk_GENERAL_NAME_num(gens); i++) {
 463         BIO_printf(out, "%*s", indent + 2, "");
 464         GENERAL_NAME_print(out, sk_GENERAL_NAME_value(gens, i));
 465         BIO_puts(out, "\n");
 466     }
 467     return 1;
 468 }
 469
 470 static int print_distpoint(BIO *out, DIST_POINT_NAME *dpn, int indent)
 471 {
 472     if (dpn->type == 0) {
 473         BIO_printf(out, "%*sFull Name:\n", indent, "");
 474         print_gens(out, dpn->name.fullname, indent);
 475     } else {
 476         X509_NAME ntmp;
 477         ntmp.entries = dpn->name.relativename;
 478         BIO_printf(out, "%*sRelative Name:\n%*s", indent, "", indent + 2, "");
 479         X509_NAME_print_ex(out, &ntmp, 0, XN_FLAG_ONELINE);
 480         BIO_puts(out, "\n");
 481     }
 482     return 1;
 483 }
 484
 485 static int i2r_idp(const X509V3_EXT_METHOD *method, void *pidp, BIO *out,
 486                    int indent)
 487 {
 488     ISSUING_DIST_POINT *idp = pidp;
 489     if (idp->distpoint)
 490         print_distpoint(out, idp->distpoint, indent);
 491     if (idp->onlyuser > 0)
 492         BIO_printf(out, "%*sOnly User Certificates\n", indent, "");
 493     if (idp->onlyCA > 0)
 494         BIO_printf(out, "%*sOnly CA Certificates\n", indent, "");
 495     if (idp->indirectCRL > 0)
 496         BIO_printf(out, "%*sIndirect CRL\n", indent, "");
 497     if (idp->onlysomereasons)
 498         print_reasons(out, "Only Some Reasons", idp->onlysomereasons, indent);
 499     if (idp->onlyattr > 0)
 500         BIO_printf(out, "%*sOnly Attribute Certificates\n", indent, "");
 501     if (!idp->distpoint && (idp->onlyuser <= 0) && (idp->onlyCA <= 0)
 502         && (idp->indirectCRL <= 0) && !idp->onlysomereasons
 503         && (idp->onlyattr <= 0))
 504         BIO_printf(out, "%*s<EMPTY>\n", indent, "");
 505
 506     return 1;
 507 }
 508
 509 static int i2r_crldp(const X509V3_EXT_METHOD *method, void *pcrldp, BIO *out,
 510                      int indent)
 511 {
 512     STACK_OF(DIST_POINT) *crld = pcrldp;
 513     DIST_POINT *point;
 514     int i;
 515     for (i = 0; i < sk_DIST_POINT_num(crld); i++) {
 516         BIO_puts(out, "\n");
 517         point = sk_DIST_POINT_value(crld, i);
 518         if (point->distpoint)
 519             print_distpoint(out, point->distpoint, indent);
 520         if (point->reasons)
 521             print_reasons(out, "Reasons", point->reasons, indent);
 522         if (point->CRLissuer) {
 523             BIO_printf(out, "%*sCRL Issuer:\n", indent, "");
 524             print_gens(out, point->CRLissuer, indent);
 525         }
 526     }
 527     return 1;
 528 }
 529
 530 int DIST_POINT_set_dpname(DIST_POINT_NAME *dpn, X509_NAME *iname)
 531 {
 532     int i;
 533     STACK_OF(X509_NAME_ENTRY) *frag;
 534     X509_NAME_ENTRY *ne;
 535     if (!dpn || (dpn->type != 1))
 536         return 1;
 537     frag = dpn->name.relativename;
 538     dpn->dpname = X509_NAME_dup(iname);
 539     if (!dpn->dpname)
 540         return 0;
 541     for (i = 0; i < sk_X509_NAME_ENTRY_num(frag); i++) {
 542         ne = sk_X509_NAME_ENTRY_value(frag, i);
 543         if (!X509_NAME_add_entry(dpn->dpname, ne, -1, i ? 0 : 1)) {
 544             X509_NAME_free(dpn->dpname);
 545             dpn->dpname = NULL;
 546             return 0;
 547         }
 548     }
 549     /* generate cached encoding of name */
 550     if (i2d_X509_NAME(dpn->dpname, NULL) < 0) {
 551         X509_NAME_free(dpn->dpname);
 552         dpn->dpname = NULL;
 553         return 0;
 554     }
 555     return 1;
 556 }