crypto/x509v3/v3_alt.c

   1 /*
   2  * Copyright 1999-2017 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/x509v3.h>
  14 #include "ext_dat.h"
  15
  16 static GENERAL_NAMES *v2i_subject_alt(X509V3_EXT_METHOD *method,
  17                                       X509V3_CTX *ctx,
  18                                       STACK_OF(CONF_VALUE) *nval);
  19 static GENERAL_NAMES *v2i_issuer_alt(X509V3_EXT_METHOD *method,
  20                                      X509V3_CTX *ctx,
  21                                      STACK_OF(CONF_VALUE) *nval);
  22 static int copy_email(X509V3_CTX *ctx, GENERAL_NAMES *gens, int move_p);
  23 static int copy_issuer(X509V3_CTX *ctx, GENERAL_NAMES *gens);
  24 static int do_othername(GENERAL_NAME *gen, const char *value, X509V3_CTX *ctx);
  25 static int do_dirname(GENERAL_NAME *gen, const char *value, X509V3_CTX *ctx);
  26
  27 const X509V3_EXT_METHOD v3_alt[3] = {
  28     {NID_subject_alt_name, 0, ASN1_ITEM_ref(GENERAL_NAMES),
  29      0, 0, 0, 0,
  30      0, 0,
  31      (X509V3_EXT_I2V) i2v_GENERAL_NAMES,
  32      (X509V3_EXT_V2I)v2i_subject_alt,
  33      NULL, NULL, NULL},
  34
  35     {NID_issuer_alt_name, 0, ASN1_ITEM_ref(GENERAL_NAMES),
  36      0, 0, 0, 0,
  37      0, 0,
  38      (X509V3_EXT_I2V) i2v_GENERAL_NAMES,
  39      (X509V3_EXT_V2I)v2i_issuer_alt,
  40      NULL, NULL, NULL},
  41
  42     {NID_certificate_issuer, 0, ASN1_ITEM_ref(GENERAL_NAMES),
  43      0, 0, 0, 0,
  44      0, 0,
  45      (X509V3_EXT_I2V) i2v_GENERAL_NAMES,
  46      NULL, NULL, NULL, NULL},
  47 };
  48
  49 STACK_OF(CONF_VALUE) *i2v_GENERAL_NAMES(X509V3_EXT_METHOD *method,
  50                                         GENERAL_NAMES *gens,
  51                                         STACK_OF(CONF_VALUE) *ret)
  52 {
  53     int i;
  54     GENERAL_NAME *gen;
  55     for (i = 0; i < sk_GENERAL_NAME_num(gens); i++) {
  56         gen = sk_GENERAL_NAME_value(gens, i);
  57         ret = i2v_GENERAL_NAME(method, gen, ret);
  58     }
  59     if (!ret)
  60         return sk_CONF_VALUE_new_null();
  61     return ret;
  62 }
  63
  64 STACK_OF(CONF_VALUE) *i2v_GENERAL_NAME(X509V3_EXT_METHOD *method,
  65                                        GENERAL_NAME *gen,
  66                                        STACK_OF(CONF_VALUE) *ret)
  67 {
  68     unsigned char *p;
  69     char oline[256], htmp[5];
  70     int i;
  71
  72     switch (gen->type) {
  73     case GEN_OTHERNAME:
  74         if (!X509V3_add_value("othername", "<unsupported>", &ret))
  75             return NULL;
  76         break;
  77
  78     case GEN_X400:
  79         if (!X509V3_add_value("X400Name", "<unsupported>", &ret))
  80             return NULL;
  81         break;
  82
  83     case GEN_EDIPARTY:
  84         if (!X509V3_add_value("EdiPartyName", "<unsupported>", &ret))
  85             return NULL;
  86         break;
  87
  88     case GEN_EMAIL:
  89         if (!X509V3_add_value_uchar("email", gen->d.ia5->data, &ret))
  90             return NULL;
  91         break;
  92
  93     case GEN_DNS:
  94         if (!X509V3_add_value_uchar("DNS", gen->d.ia5->data, &ret))
  95             return NULL;
  96         break;
  97
  98     case GEN_URI:
  99         if (!X509V3_add_value_uchar("URI", gen->d.ia5->data, &ret))
 100             return NULL;
 101         break;
 102
 103     case GEN_DIRNAME:
 104         if (X509_NAME_oneline(gen->d.dirn, oline, sizeof(oline)) == NULL
 105                 || !X509V3_add_value("DirName", oline, &ret))
 106             return NULL;
 107         break;
 108
 109     case GEN_IPADD:
 110         p = gen->d.ip->data;
 111         if (gen->d.ip->length == 4)
 112             BIO_snprintf(oline, sizeof(oline), "%d.%d.%d.%d",
 113                          p[0], p[1], p[2], p[3]);
 114         else if (gen->d.ip->length == 16) {
 115             oline[0] = 0;
 116             for (i = 0; i < 8; i++) {
 117                 BIO_snprintf(htmp, sizeof(htmp), "%X", p[0] << 8 | p[1]);
 118                 p += 2;
 119                 strcat(oline, htmp);
 120                 if (i != 7)
 121                     strcat(oline, ":");
 122             }
 123         } else {
 124             if (!X509V3_add_value("IP Address", "<invalid>", &ret))
 125                 return NULL;
 126             break;
 127         }
 128         if (!X509V3_add_value("IP Address", oline, &ret))
 129             return NULL;
 130         break;
 131
 132     case GEN_RID:
 133         i2t_ASN1_OBJECT(oline, 256, gen->d.rid);
 134         if (!X509V3_add_value("Registered ID", oline, &ret))
 135             return NULL;
 136         break;
 137     }
 138     return ret;
 139 }
 140
 141 int GENERAL_NAME_print(BIO *out, GENERAL_NAME *gen)
 142 {
 143     unsigned char *p;
 144     int i;
 145     switch (gen->type) {
 146     case GEN_OTHERNAME:
 147         BIO_printf(out, "othername:<unsupported>");
 148         break;
 149
 150     case GEN_X400:
 151         BIO_printf(out, "X400Name:<unsupported>");
 152         break;
 153
 154     case GEN_EDIPARTY:
 155         /* Maybe fix this: it is supported now */
 156         BIO_printf(out, "EdiPartyName:<unsupported>");
 157         break;
 158
 159     case GEN_EMAIL:
 160         BIO_printf(out, "email:%s", gen->d.ia5->data);
 161         break;
 162
 163     case GEN_DNS:
 164         BIO_printf(out, "DNS:%s", gen->d.ia5->data);
 165         break;
 166
 167     case GEN_URI:
 168         BIO_printf(out, "URI:%s", gen->d.ia5->data);
 169         break;
 170
 171     case GEN_DIRNAME:
 172         BIO_printf(out, "DirName:");
 173         X509_NAME_print_ex(out, gen->d.dirn, 0, XN_FLAG_ONELINE);
 174         break;
 175
 176     case GEN_IPADD:
 177         p = gen->d.ip->data;
 178         if (gen->d.ip->length == 4)
 179             BIO_printf(out, "IP Address:%d.%d.%d.%d", p[0], p[1], p[2], p[3]);
 180         else if (gen->d.ip->length == 16) {
 181             BIO_printf(out, "IP Address");
 182             for (i = 0; i < 8; i++) {
 183                 BIO_printf(out, ":%X", p[0] << 8 | p[1]);
 184                 p += 2;
 185             }
 186         } else {
 187             BIO_printf(out, "IP Address:<invalid>");
 188             break;
 189         }
 190         break;
 191
 192     case GEN_RID:
 193         BIO_printf(out, "Registered ID:");
 194         i2a_ASN1_OBJECT(out, gen->d.rid);
 195         break;
 196     }
 197     return 1;
 198 }
 199
 200 static GENERAL_NAMES *v2i_issuer_alt(X509V3_EXT_METHOD *method,
 201                                      X509V3_CTX *ctx,
 202                                      STACK_OF(CONF_VALUE) *nval)
 203 {
 204     const int num = sk_CONF_VALUE_num(nval);
 205     GENERAL_NAMES *gens = sk_GENERAL_NAME_new_reserve(NULL, num);
 206     int i;
 207
 208     if (gens == NULL) {
 209         X509V3err(X509V3_F_V2I_ISSUER_ALT, ERR_R_MALLOC_FAILURE);
 210         sk_GENERAL_NAME_free(gens);
 211         return NULL;
 212     }
 213     for (i = 0; i < num; i++) {
 214         CONF_VALUE *cnf = sk_CONF_VALUE_value(nval, i);
 215
 216         if (!name_cmp(cnf->name, "issuer")
 217             && cnf->value && strcmp(cnf->value, "copy") == 0) {
 218             if (!copy_issuer(ctx, gens))
 219                 goto err;
 220         } else {
 221             GENERAL_NAME *gen = v2i_GENERAL_NAME(method, ctx, cnf);
 222
 223             if (gen == NULL)
 224                 goto err;
 225             sk_GENERAL_NAME_push(gens, gen); /* no failure as it was reserved */
 226         }
 227     }
 228     return gens;
 229  err:
 230     sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);
 231     return NULL;
 232 }
 233
 234 /* Append subject altname of issuer to issuer alt name of subject */
 235
 236 static int copy_issuer(X509V3_CTX *ctx, GENERAL_NAMES *gens)
 237 {
 238     GENERAL_NAMES *ialt;
 239     GENERAL_NAME *gen;
 240     X509_EXTENSION *ext;
 241     int i, num;
 242
 243     if (ctx && (ctx->flags == CTX_TEST))
 244         return 1;
 245     if (!ctx || !ctx->issuer_cert) {
 246         X509V3err(X509V3_F_COPY_ISSUER, X509V3_R_NO_ISSUER_DETAILS);
 247         goto err;
 248     }
 249     i = X509_get_ext_by_NID(ctx->issuer_cert, NID_subject_alt_name, -1);
 250     if (i < 0)
 251         return 1;
 252     if ((ext = X509_get_ext(ctx->issuer_cert, i)) == NULL
 253         || (ialt = X509V3_EXT_d2i(ext)) == NULL) {
 254         X509V3err(X509V3_F_COPY_ISSUER, X509V3_R_ISSUER_DECODE_ERROR);
 255         goto err;
 256     }
 257
 258     num = sk_GENERAL_NAME_num(ialt);
 259     if (!sk_GENERAL_NAME_reserve(gens, num)) {
 260         X509V3err(X509V3_F_COPY_ISSUER, ERR_R_MALLOC_FAILURE);
 261         goto err;
 262     }
 263
 264     for (i = 0; i < num; i++) {
 265         gen = sk_GENERAL_NAME_value(ialt, i);
 266         sk_GENERAL_NAME_push(gens, gen);     /* no failure as it was reserved */
 267     }
 268     sk_GENERAL_NAME_free(ialt);
 269
 270     return 1;
 271
 272  err:
 273     return 0;
 274
 275 }
 276
 277 static GENERAL_NAMES *v2i_subject_alt(X509V3_EXT_METHOD *method,
 278                                       X509V3_CTX *ctx,
 279                                       STACK_OF(CONF_VALUE) *nval)
 280 {
 281     GENERAL_NAMES *gens;
 282     CONF_VALUE *cnf;
 283     const int num = sk_CONF_VALUE_num(nval);
 284     int i;
 285
 286     gens = sk_GENERAL_NAME_new_reserve(NULL, num);
 287     if (gens == NULL) {
 288         X509V3err(X509V3_F_V2I_SUBJECT_ALT, ERR_R_MALLOC_FAILURE);
 289         sk_GENERAL_NAME_free(gens);
 290         return NULL;
 291     }
 292
 293     for (i = 0; i < num; i++) {
 294         cnf = sk_CONF_VALUE_value(nval, i);
 295         if (!name_cmp(cnf->name, "email")
 296             && cnf->value && strcmp(cnf->value, "copy") == 0) {
 297             if (!copy_email(ctx, gens, 0))
 298                 goto err;
 299         } else if (!name_cmp(cnf->name, "email")
 300                    && cnf->value && strcmp(cnf->value, "move") == 0) {
 301             if (!copy_email(ctx, gens, 1))
 302                 goto err;
 303         } else {
 304             GENERAL_NAME *gen;
 305             if ((gen = v2i_GENERAL_NAME(method, ctx, cnf)) == NULL)
 306                 goto err;
 307             sk_GENERAL_NAME_push(gens, gen); /* no failure as it was reserved */
 308         }
 309     }
 310     return gens;
 311  err:
 312     sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);
 313     return NULL;
 314 }
 315
 316 /*
 317  * Copy any email addresses in a certificate or request to GENERAL_NAMES
 318  */
 319
 320 static int copy_email(X509V3_CTX *ctx, GENERAL_NAMES *gens, int move_p)
 321 {
 322     X509_NAME *nm;
 323     ASN1_IA5STRING *email = NULL;
 324     X509_NAME_ENTRY *ne;
 325     GENERAL_NAME *gen = NULL;
 326     int i = -1;
 327
 328     if (ctx != NULL && ctx->flags == CTX_TEST)
 329         return 1;
 330     if (ctx == NULL
 331         || (ctx->subject_cert == NULL && ctx->subject_req == NULL)) {
 332         X509V3err(X509V3_F_COPY_EMAIL, X509V3_R_NO_SUBJECT_DETAILS);
 333         goto err;
 334     }
 335     /* Find the subject name */
 336     if (ctx->subject_cert)
 337         nm = X509_get_subject_name(ctx->subject_cert);
 338     else
 339         nm = X509_REQ_get_subject_name(ctx->subject_req);
 340
 341     /* Now add any email address(es) to STACK */
 342     while ((i = X509_NAME_get_index_by_NID(nm,
 343                                            NID_pkcs9_emailAddress, i)) >= 0) {
 344         ne = X509_NAME_get_entry(nm, i);
 345         email = ASN1_STRING_dup(X509_NAME_ENTRY_get_data(ne));
 346         if (move_p) {
 347             X509_NAME_delete_entry(nm, i);
 348             X509_NAME_ENTRY_free(ne);
 349             i--;
 350         }
 351         if (email == NULL || (gen = GENERAL_NAME_new()) == NULL) {
 352             X509V3err(X509V3_F_COPY_EMAIL, ERR_R_MALLOC_FAILURE);
 353             goto err;
 354         }
 355         gen->d.ia5 = email;
 356         email = NULL;
 357         gen->type = GEN_EMAIL;
 358         if (!sk_GENERAL_NAME_push(gens, gen)) {
 359             X509V3err(X509V3_F_COPY_EMAIL, ERR_R_MALLOC_FAILURE);
 360             goto err;
 361         }
 362         gen = NULL;
 363     }
 364
 365     return 1;
 366
 367  err:
 368     GENERAL_NAME_free(gen);
 369     ASN1_IA5STRING_free(email);
 370     return 0;
 371
 372 }
 373
 374 GENERAL_NAMES *v2i_GENERAL_NAMES(const X509V3_EXT_METHOD *method,
 375                                  X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *nval)
 376 {
 377     GENERAL_NAME *gen;
 378     GENERAL_NAMES *gens;
 379     CONF_VALUE *cnf;
 380     const int num = sk_CONF_VALUE_num(nval);
 381     int i;
 382
 383     gens = sk_GENERAL_NAME_new_reserve(NULL, num);
 384     if (gens == NULL) {
 385         X509V3err(X509V3_F_V2I_GENERAL_NAMES, ERR_R_MALLOC_FAILURE);
 386         sk_GENERAL_NAME_free(gens);
 387         return NULL;
 388     }
 389
 390     for (i = 0; i < num; i++) {
 391         cnf = sk_CONF_VALUE_value(nval, i);
 392         if ((gen = v2i_GENERAL_NAME(method, ctx, cnf)) == NULL)
 393             goto err;
 394         sk_GENERAL_NAME_push(gens, gen);    /* no failure as it was reserved */
 395     }
 396     return gens;
 397  err:
 398     sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);
 399     return NULL;
 400 }
 401
 402 GENERAL_NAME *v2i_GENERAL_NAME(const X509V3_EXT_METHOD *method,
 403                                X509V3_CTX *ctx, CONF_VALUE *cnf)
 404 {
 405     return v2i_GENERAL_NAME_ex(NULL, method, ctx, cnf, 0);
 406 }
 407
 408 GENERAL_NAME *a2i_GENERAL_NAME(GENERAL_NAME *out,
 409                                const X509V3_EXT_METHOD *method,
 410                                X509V3_CTX *ctx, int gen_type, const char *value,
 411                                int is_nc)
 412 {
 413     char is_string = 0;
 414     GENERAL_NAME *gen = NULL;
 415
 416     if (!value) {
 417         X509V3err(X509V3_F_A2I_GENERAL_NAME, X509V3_R_MISSING_VALUE);
 418         return NULL;
 419     }
 420
 421     if (out)
 422         gen = out;
 423     else {
 424         gen = GENERAL_NAME_new();
 425         if (gen == NULL) {
 426             X509V3err(X509V3_F_A2I_GENERAL_NAME, ERR_R_MALLOC_FAILURE);
 427             return NULL;
 428         }
 429     }
 430
 431     switch (gen_type) {
 432     case GEN_URI:
 433     case GEN_EMAIL:
 434     case GEN_DNS:
 435         is_string = 1;
 436         break;
 437
 438     case GEN_RID:
 439         {
 440             ASN1_OBJECT *obj;
 441             if ((obj = OBJ_txt2obj(value, 0)) == NULL) {
 442                 X509V3err(X509V3_F_A2I_GENERAL_NAME, X509V3_R_BAD_OBJECT);
 443                 ERR_add_error_data(2, "value=", value);
 444                 goto err;
 445             }
 446             gen->d.rid = obj;
 447         }
 448         break;
 449
 450     case GEN_IPADD:
 451         if (is_nc)
 452             gen->d.ip = a2i_IPADDRESS_NC(value);
 453         else
 454             gen->d.ip = a2i_IPADDRESS(value);
 455         if (gen->d.ip == NULL) {
 456             X509V3err(X509V3_F_A2I_GENERAL_NAME, X509V3_R_BAD_IP_ADDRESS);
 457             ERR_add_error_data(2, "value=", value);
 458             goto err;
 459         }
 460         break;
 461
 462     case GEN_DIRNAME:
 463         if (!do_dirname(gen, value, ctx)) {
 464             X509V3err(X509V3_F_A2I_GENERAL_NAME, X509V3_R_DIRNAME_ERROR);
 465             goto err;
 466         }
 467         break;
 468
 469     case GEN_OTHERNAME:
 470         if (!do_othername(gen, value, ctx)) {
 471             X509V3err(X509V3_F_A2I_GENERAL_NAME, X509V3_R_OTHERNAME_ERROR);
 472             goto err;
 473         }
 474         break;
 475     default:
 476         X509V3err(X509V3_F_A2I_GENERAL_NAME, X509V3_R_UNSUPPORTED_TYPE);
 477         goto err;
 478     }
 479
 480     if (is_string) {
 481         if ((gen->d.ia5 = ASN1_IA5STRING_new()) == NULL ||
 482             !ASN1_STRING_set(gen->d.ia5, (unsigned char *)value,
 483                              strlen(value))) {
 484             X509V3err(X509V3_F_A2I_GENERAL_NAME, ERR_R_MALLOC_FAILURE);
 485             goto err;
 486         }
 487     }
 488
 489     gen->type = gen_type;
 490
 491     return gen;
 492
 493  err:
 494     if (!out)
 495         GENERAL_NAME_free(gen);
 496     return NULL;
 497 }
 498
 499 GENERAL_NAME *v2i_GENERAL_NAME_ex(GENERAL_NAME *out,
 500                                   const X509V3_EXT_METHOD *method,
 501                                   X509V3_CTX *ctx, CONF_VALUE *cnf, int is_nc)
 502 {
 503     int type;
 504
 505     char *name, *value;
 506
 507     name = cnf->name;
 508     value = cnf->value;
 509
 510     if (!value) {
 511         X509V3err(X509V3_F_V2I_GENERAL_NAME_EX, X509V3_R_MISSING_VALUE);
 512         return NULL;
 513     }
 514
 515     if (!name_cmp(name, "email"))
 516         type = GEN_EMAIL;
 517     else if (!name_cmp(name, "URI"))
 518         type = GEN_URI;
 519     else if (!name_cmp(name, "DNS"))
 520         type = GEN_DNS;
 521     else if (!name_cmp(name, "RID"))
 522         type = GEN_RID;
 523     else if (!name_cmp(name, "IP"))
 524         type = GEN_IPADD;
 525     else if (!name_cmp(name, "dirName"))
 526         type = GEN_DIRNAME;
 527     else if (!name_cmp(name, "otherName"))
 528         type = GEN_OTHERNAME;
 529     else {
 530         X509V3err(X509V3_F_V2I_GENERAL_NAME_EX, X509V3_R_UNSUPPORTED_OPTION);
 531         ERR_add_error_data(2, "name=", name);
 532         return NULL;
 533     }
 534
 535     return a2i_GENERAL_NAME(out, method, ctx, type, value, is_nc);
 536
 537 }
 538
 539 static int do_othername(GENERAL_NAME *gen, const char *value, X509V3_CTX *ctx)
 540 {
 541     char *objtmp = NULL, *p;
 542     int objlen;
 543
 544     if ((p = strchr(value, ';')) == NULL)
 545         return 0;
 546     if ((gen->d.otherName = OTHERNAME_new()) == NULL)
 547         return 0;
 548     /*
 549      * Free this up because we will overwrite it. no need to free type_id
 550      * because it is static
 551      */
 552     ASN1_TYPE_free(gen->d.otherName->value);
 553     if ((gen->d.otherName->value = ASN1_generate_v3(p + 1, ctx)) == NULL)
 554         return 0;
 555     objlen = p - value;
 556     objtmp = OPENSSL_strndup(value, objlen);
 557     if (objtmp == NULL)
 558         return 0;
 559     gen->d.otherName->type_id = OBJ_txt2obj(objtmp, 0);
 560     OPENSSL_free(objtmp);
 561     if (!gen->d.otherName->type_id)
 562         return 0;
 563     return 1;
 564 }
 565
 566 static int do_dirname(GENERAL_NAME *gen, const char *value, X509V3_CTX *ctx)
 567 {
 568     int ret = 0;
 569     STACK_OF(CONF_VALUE) *sk = NULL;
 570     X509_NAME *nm;
 571
 572     if ((nm = X509_NAME_new()) == NULL)
 573         goto err;
 574     sk = X509V3_get_section(ctx, value);
 575     if (!sk) {
 576         X509V3err(X509V3_F_DO_DIRNAME, X509V3_R_SECTION_NOT_FOUND);
 577         ERR_add_error_data(2, "section=", value);
 578         goto err;
 579     }
 580     /* FIXME: should allow other character types... */
 581     ret = X509V3_NAME_from_section(nm, sk, MBSTRING_ASC);
 582     if (!ret)
 583         goto err;
 584     gen->d.dirn = nm;
 585
 586 err:
 587     if (ret == 0)
 588         X509_NAME_free(nm);
 589     X509V3_section_free(ctx, sk);
 590     return ret;
 591 }