crypto/x509/v3_cpols.c

   1 /*
   2  * Copyright 1999-2018 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 "pcy_int.h"
  18 #include "ext_dat.h"
  19
  20 /* Certificate policies extension support: this one is a bit complex... */
  21
  22 static int i2r_certpol(X509V3_EXT_METHOD *method, STACK_OF(POLICYINFO) *pol,
  23                        BIO *out, int indent);
  24 static STACK_OF(POLICYINFO) *r2i_certpol(X509V3_EXT_METHOD *method,
  25                                          X509V3_CTX *ctx, const char *value);
  26 static void print_qualifiers(BIO *out, STACK_OF(POLICYQUALINFO) *quals,
  27                              int indent);
  28 static void print_notice(BIO *out, USERNOTICE *notice, int indent);
  29 static POLICYINFO *policy_section(X509V3_CTX *ctx,
  30                                   STACK_OF(CONF_VALUE) *polstrs, int ia5org);
  31 static POLICYQUALINFO *notice_section(X509V3_CTX *ctx,
  32                                       STACK_OF(CONF_VALUE) *unot, int ia5org);
  33 static int nref_nos(STACK_OF(ASN1_INTEGER) *nnums, STACK_OF(CONF_VALUE) *nos);
  34 static int displaytext_str2tag(const char *tagstr, unsigned int *tag_len);
  35 static int displaytext_get_tag_len(const char *tagstr);
  36
  37 const X509V3_EXT_METHOD v3_cpols = {
  38     NID_certificate_policies, 0, ASN1_ITEM_ref(CERTIFICATEPOLICIES),
  39     0, 0, 0, 0,
  40     0, 0,
  41     0, 0,
  42     (X509V3_EXT_I2R)i2r_certpol,
  43     (X509V3_EXT_R2I)r2i_certpol,
  44     NULL
  45 };
  46
  47 ASN1_ITEM_TEMPLATE(CERTIFICATEPOLICIES) =
  48         ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SEQUENCE_OF, 0, CERTIFICATEPOLICIES, POLICYINFO)
  49 ASN1_ITEM_TEMPLATE_END(CERTIFICATEPOLICIES)
  50
  51 IMPLEMENT_ASN1_FUNCTIONS(CERTIFICATEPOLICIES)
  52
  53 ASN1_SEQUENCE(POLICYINFO) = {
  54         ASN1_SIMPLE(POLICYINFO, policyid, ASN1_OBJECT),
  55         ASN1_SEQUENCE_OF_OPT(POLICYINFO, qualifiers, POLICYQUALINFO)
  56 } ASN1_SEQUENCE_END(POLICYINFO)
  57
  58 IMPLEMENT_ASN1_FUNCTIONS(POLICYINFO)
  59
  60 ASN1_ADB_TEMPLATE(policydefault) = ASN1_SIMPLE(POLICYQUALINFO, d.other, ASN1_ANY);
  61
  62 ASN1_ADB(POLICYQUALINFO) = {
  63         ADB_ENTRY(NID_id_qt_cps, ASN1_SIMPLE(POLICYQUALINFO, d.cpsuri, ASN1_IA5STRING)),
  64         ADB_ENTRY(NID_id_qt_unotice, ASN1_SIMPLE(POLICYQUALINFO, d.usernotice, USERNOTICE))
  65 } ASN1_ADB_END(POLICYQUALINFO, 0, pqualid, 0, &policydefault_tt, NULL);
  66
  67 ASN1_SEQUENCE(POLICYQUALINFO) = {
  68         ASN1_SIMPLE(POLICYQUALINFO, pqualid, ASN1_OBJECT),
  69         ASN1_ADB_OBJECT(POLICYQUALINFO)
  70 } ASN1_SEQUENCE_END(POLICYQUALINFO)
  71
  72 IMPLEMENT_ASN1_FUNCTIONS(POLICYQUALINFO)
  73
  74 ASN1_SEQUENCE(USERNOTICE) = {
  75         ASN1_OPT(USERNOTICE, noticeref, NOTICEREF),
  76         ASN1_OPT(USERNOTICE, exptext, DISPLAYTEXT)
  77 } ASN1_SEQUENCE_END(USERNOTICE)
  78
  79 IMPLEMENT_ASN1_FUNCTIONS(USERNOTICE)
  80
  81 ASN1_SEQUENCE(NOTICEREF) = {
  82         ASN1_SIMPLE(NOTICEREF, organization, DISPLAYTEXT),
  83         ASN1_SEQUENCE_OF(NOTICEREF, noticenos, ASN1_INTEGER)
  84 } ASN1_SEQUENCE_END(NOTICEREF)
  85
  86 IMPLEMENT_ASN1_FUNCTIONS(NOTICEREF)
  87
  88 static STACK_OF(POLICYINFO) *r2i_certpol(X509V3_EXT_METHOD *method,
  89                                          X509V3_CTX *ctx, const char *value)
  90 {
  91     STACK_OF(POLICYINFO) *pols;
  92     char *pstr;
  93     POLICYINFO *pol;
  94     ASN1_OBJECT *pobj;
  95     STACK_OF(CONF_VALUE) *vals = X509V3_parse_list(value);
  96     CONF_VALUE *cnf;
  97     const int num = sk_CONF_VALUE_num(vals);
  98     int i, ia5org;
  99
 100     if (vals == NULL) {
 101         X509V3err(X509V3_F_R2I_CERTPOL, ERR_R_X509V3_LIB);
 102         return NULL;
 103     }
 104
 105     pols = sk_POLICYINFO_new_reserve(NULL, num);
 106     if (pols == NULL) {
 107         X509V3err(X509V3_F_R2I_CERTPOL, ERR_R_MALLOC_FAILURE);
 108         goto err;
 109     }
 110
 111     ia5org = 0;
 112     for (i = 0; i < num; i++) {
 113         cnf = sk_CONF_VALUE_value(vals, i);
 114
 115         if (cnf->value || !cnf->name) {
 116             X509V3err(X509V3_F_R2I_CERTPOL,
 117                       X509V3_R_INVALID_POLICY_IDENTIFIER);
 118             X509V3_conf_err(cnf);
 119             goto err;
 120         }
 121         pstr = cnf->name;
 122         if (strcmp(pstr, "ia5org") == 0) {
 123             ia5org = 1;
 124             continue;
 125         } else if (*pstr == '@') {
 126             STACK_OF(CONF_VALUE) *polsect;
 127             polsect = X509V3_get_section(ctx, pstr + 1);
 128             if (!polsect) {
 129                 X509V3err(X509V3_F_R2I_CERTPOL, X509V3_R_INVALID_SECTION);
 130
 131                 X509V3_conf_err(cnf);
 132                 goto err;
 133             }
 134             pol = policy_section(ctx, polsect, ia5org);
 135             X509V3_section_free(ctx, polsect);
 136             if (pol == NULL)
 137                 goto err;
 138         } else {
 139             if ((pobj = OBJ_txt2obj(cnf->name, 0)) == NULL) {
 140                 X509V3err(X509V3_F_R2I_CERTPOL,
 141                           X509V3_R_INVALID_OBJECT_IDENTIFIER);
 142                 X509V3_conf_err(cnf);
 143                 goto err;
 144             }
 145             pol = POLICYINFO_new();
 146             if (pol == NULL) {
 147                 ASN1_OBJECT_free(pobj);
 148                 X509V3err(X509V3_F_R2I_CERTPOL, ERR_R_MALLOC_FAILURE);
 149                 goto err;
 150             }
 151             pol->policyid = pobj;
 152         }
 153         if (!sk_POLICYINFO_push(pols, pol)) {
 154             POLICYINFO_free(pol);
 155             X509V3err(X509V3_F_R2I_CERTPOL, ERR_R_MALLOC_FAILURE);
 156             goto err;
 157         }
 158     }
 159     sk_CONF_VALUE_pop_free(vals, X509V3_conf_free);
 160     return pols;
 161  err:
 162     sk_CONF_VALUE_pop_free(vals, X509V3_conf_free);
 163     sk_POLICYINFO_pop_free(pols, POLICYINFO_free);
 164     return NULL;
 165 }
 166
 167 static POLICYINFO *policy_section(X509V3_CTX *ctx,
 168                                   STACK_OF(CONF_VALUE) *polstrs, int ia5org)
 169 {
 170     int i;
 171     CONF_VALUE *cnf;
 172     POLICYINFO *pol;
 173     POLICYQUALINFO *qual;
 174
 175     if ((pol = POLICYINFO_new()) == NULL)
 176         goto merr;
 177     for (i = 0; i < sk_CONF_VALUE_num(polstrs); i++) {
 178         cnf = sk_CONF_VALUE_value(polstrs, i);
 179         if (strcmp(cnf->name, "policyIdentifier") == 0) {
 180             ASN1_OBJECT *pobj;
 181             if ((pobj = OBJ_txt2obj(cnf->value, 0)) == NULL) {
 182                 X509V3err(X509V3_F_POLICY_SECTION,
 183                           X509V3_R_INVALID_OBJECT_IDENTIFIER);
 184                 X509V3_conf_err(cnf);
 185                 goto err;
 186             }
 187             pol->policyid = pobj;
 188
 189         } else if (!name_cmp(cnf->name, "CPS")) {
 190             if (pol->qualifiers == NULL)
 191                 pol->qualifiers = sk_POLICYQUALINFO_new_null();
 192             if ((qual = POLICYQUALINFO_new()) == NULL)
 193                 goto merr;
 194             if (!sk_POLICYQUALINFO_push(pol->qualifiers, qual))
 195                 goto merr;
 196             if ((qual->pqualid = OBJ_nid2obj(NID_id_qt_cps)) == NULL) {
 197                 X509V3err(X509V3_F_POLICY_SECTION, ERR_R_INTERNAL_ERROR);
 198                 goto err;
 199             }
 200             if ((qual->d.cpsuri = ASN1_IA5STRING_new()) == NULL)
 201                 goto merr;
 202             if (!ASN1_STRING_set(qual->d.cpsuri, cnf->value,
 203                                  strlen(cnf->value)))
 204                 goto merr;
 205         } else if (!name_cmp(cnf->name, "userNotice")) {
 206             STACK_OF(CONF_VALUE) *unot;
 207             if (*cnf->value != '@') {
 208                 X509V3err(X509V3_F_POLICY_SECTION,
 209                           X509V3_R_EXPECTED_A_SECTION_NAME);
 210                 X509V3_conf_err(cnf);
 211                 goto err;
 212             }
 213             unot = X509V3_get_section(ctx, cnf->value + 1);
 214             if (!unot) {
 215                 X509V3err(X509V3_F_POLICY_SECTION, X509V3_R_INVALID_SECTION);
 216
 217                 X509V3_conf_err(cnf);
 218                 goto err;
 219             }
 220             qual = notice_section(ctx, unot, ia5org);
 221             X509V3_section_free(ctx, unot);
 222             if (!qual)
 223                 goto err;
 224             if (!pol->qualifiers)
 225                 pol->qualifiers = sk_POLICYQUALINFO_new_null();
 226             if (!sk_POLICYQUALINFO_push(pol->qualifiers, qual))
 227                 goto merr;
 228         } else {
 229             X509V3err(X509V3_F_POLICY_SECTION, X509V3_R_INVALID_OPTION);
 230
 231             X509V3_conf_err(cnf);
 232             goto err;
 233         }
 234     }
 235     if (!pol->policyid) {
 236         X509V3err(X509V3_F_POLICY_SECTION, X509V3_R_NO_POLICY_IDENTIFIER);
 237         goto err;
 238     }
 239
 240     return pol;
 241
 242  merr:
 243     X509V3err(X509V3_F_POLICY_SECTION, ERR_R_MALLOC_FAILURE);
 244
 245  err:
 246     POLICYINFO_free(pol);
 247     return NULL;
 248 }
 249
 250 static int displaytext_get_tag_len(const char *tagstr)
 251 {
 252     char *colon = strchr(tagstr, ':');
 253
 254     return (colon == NULL) ? -1 : colon - tagstr;
 255 }
 256
 257 static int displaytext_str2tag(const char *tagstr, unsigned int *tag_len)
 258 {
 259     int len;
 260
 261     *tag_len = 0;
 262     len = displaytext_get_tag_len(tagstr);
 263
 264     if (len == -1)
 265         return V_ASN1_VISIBLESTRING;
 266     *tag_len = len;
 267     if (len == sizeof("UTF8") - 1 && strncmp(tagstr, "UTF8", len) == 0)
 268         return V_ASN1_UTF8STRING;
 269     if (len == sizeof("UTF8String") - 1 && strncmp(tagstr, "UTF8String", len) == 0)
 270         return V_ASN1_UTF8STRING;
 271     if (len == sizeof("BMP") - 1 && strncmp(tagstr, "BMP", len) == 0)
 272         return V_ASN1_BMPSTRING;
 273     if (len == sizeof("BMPSTRING") - 1 && strncmp(tagstr, "BMPSTRING", len) == 0)
 274         return V_ASN1_BMPSTRING;
 275     if (len == sizeof("VISIBLE") - 1 && strncmp(tagstr, "VISIBLE", len) == 0)
 276         return V_ASN1_VISIBLESTRING;
 277     if (len == sizeof("VISIBLESTRING") - 1 && strncmp(tagstr, "VISIBLESTRING", len) == 0)
 278         return V_ASN1_VISIBLESTRING;
 279     *tag_len = 0;
 280     return V_ASN1_VISIBLESTRING;
 281 }
 282
 283 static POLICYQUALINFO *notice_section(X509V3_CTX *ctx,
 284                                       STACK_OF(CONF_VALUE) *unot, int ia5org)
 285 {
 286     int i, ret, len, tag;
 287     unsigned int tag_len;
 288     CONF_VALUE *cnf;
 289     USERNOTICE *not;
 290     POLICYQUALINFO *qual;
 291     char *value = NULL;
 292
 293     if ((qual = POLICYQUALINFO_new()) == NULL)
 294         goto merr;
 295     if ((qual->pqualid = OBJ_nid2obj(NID_id_qt_unotice)) == NULL) {
 296         X509V3err(X509V3_F_NOTICE_SECTION, ERR_R_INTERNAL_ERROR);
 297         goto err;
 298     }
 299     if ((not = USERNOTICE_new()) == NULL)
 300         goto merr;
 301     qual->d.usernotice = not;
 302     for (i = 0; i < sk_CONF_VALUE_num(unot); i++) {
 303         cnf = sk_CONF_VALUE_value(unot, i);
 304         value = cnf->value;
 305         if (strcmp(cnf->name, "explicitText") == 0) {
 306             tag = displaytext_str2tag(value, &tag_len);
 307             if ((not->exptext = ASN1_STRING_type_new(tag)) == NULL)
 308                 goto merr;
 309             if (tag_len != 0)
 310                 value += tag_len + 1;
 311             len = strlen(value);
 312             if (!ASN1_STRING_set(not->exptext, value, len))
 313                 goto merr;
 314         } else if (strcmp(cnf->name, "organization") == 0) {
 315             NOTICEREF *nref;
 316             if (!not->noticeref) {
 317                 if ((nref = NOTICEREF_new()) == NULL)
 318                     goto merr;
 319                 not->noticeref = nref;
 320             } else
 321                 nref = not->noticeref;
 322             if (ia5org)
 323                 nref->organization->type = V_ASN1_IA5STRING;
 324             else
 325                 nref->organization->type = V_ASN1_VISIBLESTRING;
 326             if (!ASN1_STRING_set(nref->organization, cnf->value,
 327                                  strlen(cnf->value)))
 328                 goto merr;
 329         } else if (strcmp(cnf->name, "noticeNumbers") == 0) {
 330             NOTICEREF *nref;
 331             STACK_OF(CONF_VALUE) *nos;
 332             if (!not->noticeref) {
 333                 if ((nref = NOTICEREF_new()) == NULL)
 334                     goto merr;
 335                 not->noticeref = nref;
 336             } else
 337                 nref = not->noticeref;
 338             nos = X509V3_parse_list(cnf->value);
 339             if (!nos || !sk_CONF_VALUE_num(nos)) {
 340                 X509V3err(X509V3_F_NOTICE_SECTION, X509V3_R_INVALID_NUMBERS);
 341                 X509V3_conf_err(cnf);
 342                 sk_CONF_VALUE_pop_free(nos, X509V3_conf_free);
 343                 goto err;
 344             }
 345             ret = nref_nos(nref->noticenos, nos);
 346             sk_CONF_VALUE_pop_free(nos, X509V3_conf_free);
 347             if (!ret)
 348                 goto err;
 349         } else {
 350             X509V3err(X509V3_F_NOTICE_SECTION, X509V3_R_INVALID_OPTION);
 351             X509V3_conf_err(cnf);
 352             goto err;
 353         }
 354     }
 355
 356     if (not->noticeref &&
 357         (!not->noticeref->noticenos || !not->noticeref->organization)) {
 358         X509V3err(X509V3_F_NOTICE_SECTION,
 359                   X509V3_R_NEED_ORGANIZATION_AND_NUMBERS);
 360         goto err;
 361     }
 362
 363     return qual;
 364
 365  merr:
 366     X509V3err(X509V3_F_NOTICE_SECTION, ERR_R_MALLOC_FAILURE);
 367
 368  err:
 369     POLICYQUALINFO_free(qual);
 370     return NULL;
 371 }
 372
 373 static int nref_nos(STACK_OF(ASN1_INTEGER) *nnums, STACK_OF(CONF_VALUE) *nos)
 374 {
 375     CONF_VALUE *cnf;
 376     ASN1_INTEGER *aint;
 377
 378     int i;
 379
 380     for (i = 0; i < sk_CONF_VALUE_num(nos); i++) {
 381         cnf = sk_CONF_VALUE_value(nos, i);
 382         if ((aint = s2i_ASN1_INTEGER(NULL, cnf->name)) == NULL) {
 383             X509V3err(X509V3_F_NREF_NOS, X509V3_R_INVALID_NUMBER);
 384             goto err;
 385         }
 386         if (!sk_ASN1_INTEGER_push(nnums, aint))
 387             goto merr;
 388     }
 389     return 1;
 390
 391  merr:
 392     ASN1_INTEGER_free(aint);
 393     X509V3err(X509V3_F_NREF_NOS, ERR_R_MALLOC_FAILURE);
 394
 395  err:
 396     return 0;
 397 }
 398
 399 static int i2r_certpol(X509V3_EXT_METHOD *method, STACK_OF(POLICYINFO) *pol,
 400                        BIO *out, int indent)
 401 {
 402     int i;
 403     POLICYINFO *pinfo;
 404     /* First print out the policy OIDs */
 405     for (i = 0; i < sk_POLICYINFO_num(pol); i++) {
 406         if (i > 0)
 407             BIO_puts(out, "\n");
 408         pinfo = sk_POLICYINFO_value(pol, i);
 409         BIO_printf(out, "%*sPolicy: ", indent, "");
 410         i2a_ASN1_OBJECT(out, pinfo->policyid);
 411         if (pinfo->qualifiers) {
 412             BIO_puts(out, "\n");
 413             print_qualifiers(out, pinfo->qualifiers, indent + 2);
 414         }
 415     }
 416     return 1;
 417 }
 418
 419 static void print_qualifiers(BIO *out, STACK_OF(POLICYQUALINFO) *quals,
 420                              int indent)
 421 {
 422     POLICYQUALINFO *qualinfo;
 423     int i;
 424     for (i = 0; i < sk_POLICYQUALINFO_num(quals); i++) {
 425         if (i > 0)
 426             BIO_puts(out, "\n");
 427         qualinfo = sk_POLICYQUALINFO_value(quals, i);
 428         switch (OBJ_obj2nid(qualinfo->pqualid)) {
 429         case NID_id_qt_cps:
 430             BIO_printf(out, "%*sCPS: %s", indent, "",
 431                        qualinfo->d.cpsuri->data);
 432             break;
 433
 434         case NID_id_qt_unotice:
 435             BIO_printf(out, "%*sUser Notice:\n", indent, "");
 436             print_notice(out, qualinfo->d.usernotice, indent + 2);
 437             break;
 438
 439         default:
 440             BIO_printf(out, "%*sUnknown Qualifier: ", indent + 2, "");
 441
 442             i2a_ASN1_OBJECT(out, qualinfo->pqualid);
 443             break;
 444         }
 445     }
 446 }
 447
 448 static void print_notice(BIO *out, USERNOTICE *notice, int indent)
 449 {
 450     int i;
 451     if (notice->noticeref) {
 452         NOTICEREF *ref;
 453         ref = notice->noticeref;
 454         BIO_printf(out, "%*sOrganization: %s\n", indent, "",
 455                    ref->organization->data);
 456         BIO_printf(out, "%*sNumber%s: ", indent, "",
 457                    sk_ASN1_INTEGER_num(ref->noticenos) > 1 ? "s" : "");
 458         for (i = 0; i < sk_ASN1_INTEGER_num(ref->noticenos); i++) {
 459             ASN1_INTEGER *num;
 460             char *tmp;
 461             num = sk_ASN1_INTEGER_value(ref->noticenos, i);
 462             if (i)
 463                 BIO_puts(out, ", ");
 464             if (num == NULL)
 465                 BIO_puts(out, "(null)");
 466             else {
 467                 tmp = i2s_ASN1_INTEGER(NULL, num);
 468                 if (tmp == NULL)
 469                     return;
 470                 BIO_puts(out, tmp);
 471                 OPENSSL_free(tmp);
 472             }
 473         }
 474         if (notice->exptext)
 475             BIO_puts(out, "\n");
 476     }
 477     if (notice->exptext)
 478         BIO_printf(out, "%*sExplicit Text: %s", indent, "",
 479                    notice->exptext->data);
 480 }
 481
 482 void X509_POLICY_NODE_print(BIO *out, X509_POLICY_NODE *node, int indent)
 483 {
 484     const X509_POLICY_DATA *dat = node->data;
 485
 486     BIO_printf(out, "%*sPolicy: ", indent, "");
 487
 488     i2a_ASN1_OBJECT(out, dat->valid_policy);
 489     BIO_puts(out, "\n");
 490     BIO_printf(out, "%*s%s\n", indent + 2, "",
 491                node_data_critical(dat) ? "Critical" : "Non Critical");
 492     if (dat->qualifier_set) {
 493         print_qualifiers(out, dat->qualifier_set, indent + 2);
 494         BIO_puts(out, "\n");
 495     }
 496     else
 497         BIO_printf(out, "%*sNo Qualifiers\n", indent + 2, "");
 498 }