lib/hx509/ks_p12.c

   1 /*
   2  * Copyright (c) 2004 - 2007 Kungliga Tekniska Högskolan
   3  * (Royal Institute of Technology, Stockholm, Sweden).
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  *
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  *
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * 3. Neither the name of the Institute nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #include "hx_locl.h"
  35
  36 struct ks_pkcs12 {
  37     hx509_certs certs;
  38     char *fn;
  39 };
  40
  41 typedef int (*collector_func)(hx509_context,
  42                               struct hx509_collector *,
  43                               const void *, size_t,
  44                               const PKCS12_Attributes *);
  45
  46 struct type {
  47     const heim_oid *oid;
  48     collector_func func;
  49 };
  50
  51 static void
  52 parse_pkcs12_type(hx509_context, struct hx509_collector *, const heim_oid *,
  53                   const void *, size_t, const PKCS12_Attributes *);
  54
  55
  56 static const PKCS12_Attribute *
  57 find_attribute(const PKCS12_Attributes *attrs, const heim_oid *oid)
  58 {
  59     int i;
  60     if (attrs == NULL)
  61         return NULL;
  62     for (i = 0; i < attrs->len; i++)
  63         if (der_heim_oid_cmp(oid, &attrs->val[i].attrId) == 0)
  64             return &attrs->val[i];
  65     return NULL;
  66 }
  67
  68 static int
  69 keyBag_parser(hx509_context context,
  70               struct hx509_collector *c,
  71               const void *data, size_t length,
  72               const PKCS12_Attributes *attrs)
  73 {
  74     const PKCS12_Attribute *attr;
  75     PKCS8PrivateKeyInfo ki;
  76     const heim_octet_string *os = NULL;
  77     int ret;
  78
  79     attr = find_attribute(attrs, &asn1_oid_id_pkcs_9_at_localKeyId);
  80     if (attr)
  81         os = &attr->attrValues;
  82
  83     ret = decode_PKCS8PrivateKeyInfo(data, length, &ki, NULL);
  84     if (ret)
  85         return ret;
  86
  87     _hx509_collector_private_key_add(context,
  88                                      c,
  89                                      &ki.privateKeyAlgorithm,
  90                                      NULL,
  91                                      &ki.privateKey,
  92                                      os);
  93     free_PKCS8PrivateKeyInfo(&ki);
  94     return 0;
  95 }
  96
  97 static int
  98 ShroudedKeyBag_parser(hx509_context context,
  99                       struct hx509_collector *c,
 100                       const void *data, size_t length,
 101                       const PKCS12_Attributes *attrs)
 102 {
 103     PKCS8EncryptedPrivateKeyInfo pk;
 104     heim_octet_string content;
 105     int ret;
 106
 107     memset(&pk, 0, sizeof(pk));
 108
 109     ret = decode_PKCS8EncryptedPrivateKeyInfo(data, length, &pk, NULL);
 110     if (ret)
 111         return ret;
 112
 113     ret = _hx509_pbe_decrypt(context,
 114                              _hx509_collector_get_lock(c),
 115                              &pk.encryptionAlgorithm,
 116                              &pk.encryptedData,
 117                              &content);
 118     free_PKCS8EncryptedPrivateKeyInfo(&pk);
 119     if (ret)
 120         return ret;
 121
 122     ret = keyBag_parser(context, c, content.data, content.length, attrs);
 123     der_free_octet_string(&content);
 124     return ret;
 125 }
 126
 127 static int
 128 certBag_parser(hx509_context context,
 129                struct hx509_collector *c,
 130                const void *data, size_t length,
 131                const PKCS12_Attributes *attrs)
 132 {
 133     heim_octet_string os;
 134     hx509_cert cert;
 135     PKCS12_CertBag cb;
 136     int ret;
 137
 138     ret = decode_PKCS12_CertBag(data, length, &cb, NULL);
 139     if (ret)
 140         return ret;
 141
 142     if (der_heim_oid_cmp(&asn1_oid_id_pkcs_9_at_certTypes_x509, &cb.certType)) {
 143         free_PKCS12_CertBag(&cb);
 144         return 0;
 145     }
 146
 147     ret = decode_PKCS12_OctetString(cb.certValue.data,
 148                                     cb.certValue.length,
 149                                     &os,
 150                                     NULL);
 151     free_PKCS12_CertBag(&cb);
 152     if (ret)
 153         return ret;
 154
 155     ret = hx509_cert_init_data(context, os.data, os.length, &cert);
 156     der_free_octet_string(&os);
 157     if (ret)
 158         return ret;
 159
 160     ret = _hx509_collector_certs_add(context, c, cert);
 161     if (ret) {
 162         hx509_cert_free(cert);
 163         return ret;
 164     }
 165
 166     {
 167         const PKCS12_Attribute *attr;
 168         const heim_oid *oids[] = {
 169             &asn1_oid_id_pkcs_9_at_localKeyId, &asn1_oid_id_pkcs_9_at_friendlyName
 170         };
 171         int i;
 172
 173         for  (i = 0; i < sizeof(oids)/sizeof(oids[0]); i++) {
 174             const heim_oid *oid = oids[i];
 175             attr = find_attribute(attrs, oid);
 176             if (attr)
 177                 _hx509_set_cert_attribute(context, cert, oid,
 178                                           &attr->attrValues);
 179         }
 180     }
 181
 182     hx509_cert_free(cert);
 183
 184     return 0;
 185 }
 186
 187 static int
 188 parse_safe_content(hx509_context context,
 189                    struct hx509_collector *c,
 190                    const unsigned char *p, size_t len)
 191 {
 192     PKCS12_SafeContents sc;
 193     int ret, i;
 194
 195     memset(&sc, 0, sizeof(sc));
 196
 197     ret = decode_PKCS12_SafeContents(p, len, &sc, NULL);
 198     if (ret)
 199         return ret;
 200
 201     for (i = 0; i < sc.len ; i++)
 202         parse_pkcs12_type(context,
 203                           c,
 204                           &sc.val[i].bagId,
 205                           sc.val[i].bagValue.data,
 206                           sc.val[i].bagValue.length,
 207                           sc.val[i].bagAttributes);
 208
 209     free_PKCS12_SafeContents(&sc);
 210     return 0;
 211 }
 212
 213 static int
 214 safeContent_parser(hx509_context context,
 215                    struct hx509_collector *c,
 216                    const void *data, size_t length,
 217                    const PKCS12_Attributes *attrs)
 218 {
 219     heim_octet_string os;
 220     int ret;
 221
 222     ret = decode_PKCS12_OctetString(data, length, &os, NULL);
 223     if (ret)
 224         return ret;
 225     ret = parse_safe_content(context, c, os.data, os.length);
 226     der_free_octet_string(&os);
 227     return ret;
 228 }
 229
 230 static int
 231 encryptedData_parser(hx509_context context,
 232                      struct hx509_collector *c,
 233                      const void *data, size_t length,
 234                      const PKCS12_Attributes *attrs)
 235 {
 236     heim_octet_string content;
 237     heim_oid contentType;
 238     int ret;
 239
 240     memset(&contentType, 0, sizeof(contentType));
 241
 242     ret = hx509_cms_decrypt_encrypted(context,
 243                                       _hx509_collector_get_lock(c),
 244                                       data, length,
 245                                       &contentType,
 246                                       &content);
 247     if (ret)
 248         return ret;
 249
 250     if (der_heim_oid_cmp(&contentType, &asn1_oid_id_pkcs7_data) == 0)
 251         ret = parse_safe_content(context, c, content.data, content.length);
 252
 253     der_free_octet_string(&content);
 254     der_free_oid(&contentType);
 255     return ret;
 256 }
 257
 258 static int
 259 envelopedData_parser(hx509_context context,
 260                      struct hx509_collector *c,
 261                      const void *data, size_t length,
 262                      const PKCS12_Attributes *attrs)
 263 {
 264     heim_octet_string content;
 265     heim_oid contentType;
 266     hx509_lock lock;
 267     int ret;
 268
 269     memset(&contentType, 0, sizeof(contentType));
 270
 271     lock = _hx509_collector_get_lock(c);
 272
 273     ret = hx509_cms_unenvelope(context,
 274                                _hx509_lock_unlock_certs(lock),
 275                                0,
 276                                data, length,
 277                                NULL,
 278                                0,
 279                                &contentType,
 280                                &content);
 281     if (ret) {
 282         hx509_set_error_string(context, HX509_ERROR_APPEND, ret,
 283                                "PKCS12 failed to unenvelope");
 284         return ret;
 285     }
 286
 287     if (der_heim_oid_cmp(&contentType, &asn1_oid_id_pkcs7_data) == 0)
 288         ret = parse_safe_content(context, c, content.data, content.length);
 289
 290     der_free_octet_string(&content);
 291     der_free_oid(&contentType);
 292
 293     return ret;
 294 }
 295
 296
 297 struct type bagtypes[] = {
 298     { &asn1_oid_id_pkcs12_keyBag, keyBag_parser },
 299     { &asn1_oid_id_pkcs12_pkcs8ShroudedKeyBag, ShroudedKeyBag_parser },
 300     { &asn1_oid_id_pkcs12_certBag, certBag_parser },
 301     { &asn1_oid_id_pkcs7_data, safeContent_parser },
 302     { &asn1_oid_id_pkcs7_encryptedData, encryptedData_parser },
 303     { &asn1_oid_id_pkcs7_envelopedData, envelopedData_parser }
 304 };
 305
 306 static void
 307 parse_pkcs12_type(hx509_context context,
 308                   struct hx509_collector *c,
 309                   const heim_oid *oid,
 310                   const void *data, size_t length,
 311                   const PKCS12_Attributes *attrs)
 312 {
 313     int i;
 314
 315     for (i = 0; i < sizeof(bagtypes)/sizeof(bagtypes[0]); i++)
 316         if (der_heim_oid_cmp(bagtypes[i].oid, oid) == 0)
 317             (*bagtypes[i].func)(context, c, data, length, attrs);
 318 }
 319
 320 static int
 321 p12_init(hx509_context context,
 322          hx509_certs certs, void **data, int flags,
 323          const char *residue, hx509_lock lock)
 324 {
 325     struct ks_pkcs12 *p12;
 326     size_t len;
 327     void *buf;
 328     PKCS12_PFX pfx;
 329     PKCS12_AuthenticatedSafe as;
 330     int ret, i;
 331     struct hx509_collector *c;
 332
 333     *data = NULL;
 334
 335     if (lock == NULL)
 336         lock = _hx509_empty_lock;
 337
 338     ret = _hx509_collector_alloc(context, lock, &c);
 339     if (ret)
 340         return ret;
 341
 342     p12 = calloc(1, sizeof(*p12));
 343     if (p12 == NULL) {
 344         ret = ENOMEM;
 345         hx509_set_error_string(context, 0, ret, "out of memory");
 346         goto out;
 347     }
 348
 349     p12->fn = strdup(residue);
 350     if (p12->fn == NULL) {
 351         ret = ENOMEM;
 352         hx509_set_error_string(context, 0, ret, "out of memory");
 353         goto out;
 354     }
 355
 356     if (flags & HX509_CERTS_CREATE) {
 357         ret = hx509_certs_init(context, "MEMORY:ks-file-create",
 358                                0, lock, &p12->certs);
 359         if (ret == 0)
 360             *data = p12;
 361         goto out;
 362     }
 363
 364     ret = rk_undumpdata(residue, &buf, &len);
 365     if (ret) {
 366         hx509_clear_error_string(context);
 367         goto out;
 368     }
 369
 370     ret = decode_PKCS12_PFX(buf, len, &pfx, NULL);
 371     rk_xfree(buf);
 372     if (ret) {
 373         hx509_set_error_string(context, 0, ret,
 374                                "Failed to decode the PFX in %s", residue);
 375         goto out;
 376     }
 377
 378     if (der_heim_oid_cmp(&pfx.authSafe.contentType, &asn1_oid_id_pkcs7_data) != 0) {
 379         free_PKCS12_PFX(&pfx);
 380         ret = EINVAL;
 381         hx509_set_error_string(context, 0, ret,
 382                                "PKCS PFX isn't a pkcs7-data container");
 383         goto out;
 384     }
 385
 386     if (pfx.authSafe.content == NULL) {
 387         free_PKCS12_PFX(&pfx);
 388         ret = EINVAL;
 389         hx509_set_error_string(context, 0, ret,
 390                                "PKCS PFX missing data");
 391         goto out;
 392     }
 393
 394     {
 395         heim_octet_string asdata;
 396
 397         ret = decode_PKCS12_OctetString(pfx.authSafe.content->data,
 398                                         pfx.authSafe.content->length,
 399                                         &asdata,
 400                                         NULL);
 401         free_PKCS12_PFX(&pfx);
 402         if (ret) {
 403             hx509_clear_error_string(context);
 404             goto out;
 405         }
 406         ret = decode_PKCS12_AuthenticatedSafe(asdata.data,
 407                                               asdata.length,
 408                                               &as,
 409                                               NULL);
 410         der_free_octet_string(&asdata);
 411         if (ret) {
 412             hx509_clear_error_string(context);
 413             goto out;
 414         }
 415     }
 416
 417     for (i = 0; i < as.len; i++)
 418         parse_pkcs12_type(context,
 419                           c,
 420                           &as.val[i].contentType,
 421                           as.val[i].content->data,
 422                           as.val[i].content->length,
 423                           NULL);
 424
 425     free_PKCS12_AuthenticatedSafe(&as);
 426
 427     ret = _hx509_collector_collect_certs(context, c, &p12->certs);
 428     if (ret == 0)
 429         *data = p12;
 430
 431 out:
 432     _hx509_collector_free(c);
 433
 434     if (ret && p12) {
 435         if (p12->fn)
 436             free(p12->fn);
 437         if (p12->certs)
 438             hx509_certs_free(&p12->certs);
 439         free(p12);
 440     }
 441
 442     return ret;
 443 }
 444
 445 static int
 446 addBag(hx509_context context,
 447        PKCS12_AuthenticatedSafe *as,
 448        const heim_oid *oid,
 449        void *data,
 450        size_t length)
 451 {
 452     void *ptr;
 453     int ret;
 454
 455     ptr = realloc(as->val, sizeof(as->val[0]) * (as->len + 1));
 456     if (ptr == NULL) {
 457         hx509_set_error_string(context, 0, ENOMEM, "out of memory");
 458         return ENOMEM;
 459     }
 460     as->val = ptr;
 461
 462     ret = der_copy_oid(oid, &as->val[as->len].contentType);
 463     if (ret) {
 464         hx509_set_error_string(context, 0, ret, "out of memory");
 465         return ret;
 466     }
 467
 468     as->val[as->len].content = calloc(1, sizeof(*as->val[0].content));
 469     if (as->val[as->len].content == NULL) {
 470         der_free_oid(&as->val[as->len].contentType);
 471         hx509_set_error_string(context, 0, ENOMEM, "malloc out of memory");
 472         return ENOMEM;
 473     }
 474
 475     as->val[as->len].content->data = data;
 476     as->val[as->len].content->length = length;
 477
 478     as->len++;
 479
 480     return 0;
 481 }
 482
 483 static int
 484 store_func(hx509_context context, void *ctx, hx509_cert c)
 485 {
 486     PKCS12_AuthenticatedSafe *as = ctx;
 487     PKCS12_OctetString os;
 488     PKCS12_CertBag cb;
 489     size_t size;
 490     int ret;
 491
 492     memset(&os, 0, sizeof(os));
 493     memset(&cb, 0, sizeof(cb));
 494
 495     os.data = NULL;
 496     os.length = 0;
 497
 498     ret = hx509_cert_binary(context, c, &os);
 499     if (ret)
 500         return ret;
 501
 502     ASN1_MALLOC_ENCODE(PKCS12_OctetString,
 503                        cb.certValue.data,cb.certValue.length,
 504                        &os, &size, ret);
 505     free(os.data);
 506     if (ret)
 507         goto out;
 508     ret = der_copy_oid(&asn1_oid_id_pkcs_9_at_certTypes_x509, &cb.certType);
 509     if (ret) {
 510         free_PKCS12_CertBag(&cb);
 511         goto out;
 512     }
 513     ASN1_MALLOC_ENCODE(PKCS12_CertBag, os.data, os.length,
 514                        &cb, &size, ret);
 515     free_PKCS12_CertBag(&cb);
 516     if (ret)
 517         goto out;
 518
 519     ret = addBag(context, as, &asn1_oid_id_pkcs12_certBag, os.data, os.length);
 520
 521     if (_hx509_cert_private_key_exportable(c)) {
 522         hx509_private_key key = _hx509_cert_private_key(c);
 523         PKCS8PrivateKeyInfo pki;
 524
 525         memset(&pki, 0, sizeof(pki));
 526
 527         ret = der_parse_hex_heim_integer("00", &pki.version);
 528         if (ret)
 529             return ret;
 530         ret = _hx509_private_key_oid(context, key,
 531                                      &pki.privateKeyAlgorithm.algorithm);
 532         if (ret) {
 533             free_PKCS8PrivateKeyInfo(&pki);
 534             return ret;
 535         }
 536         ret = _hx509_private_key_export(context,
 537                                         _hx509_cert_private_key(c),
 538                                         &pki.privateKey);
 539         if (ret) {
 540             free_PKCS8PrivateKeyInfo(&pki);
 541             return ret;
 542         }
 543         /* set attribute, asn1_oid_id_pkcs_9_at_localKeyId */
 544
 545         ASN1_MALLOC_ENCODE(PKCS8PrivateKeyInfo, os.data, os.length,
 546                            &pki, &size, ret);
 547         free_PKCS8PrivateKeyInfo(&pki);
 548         if (ret)
 549             return ret;
 550
 551         ret = addBag(context, as, &asn1_oid_id_pkcs12_keyBag, os.data, os.length);
 552         if (ret)
 553             return ret;
 554     }
 555
 556 out:
 557     return ret;
 558 }
 559
 560 static int
 561 p12_store(hx509_context context,
 562           hx509_certs certs, void *data, int flags, hx509_lock lock)
 563 {
 564     struct ks_pkcs12 *p12 = data;
 565     PKCS12_PFX pfx;
 566     PKCS12_AuthenticatedSafe as;
 567     PKCS12_OctetString asdata;
 568     size_t size;
 569     int ret;
 570
 571     memset(&as, 0, sizeof(as));
 572     memset(&pfx, 0, sizeof(pfx));
 573
 574     ret = hx509_certs_iter_f(context, p12->certs, store_func, &as);
 575     if (ret)
 576         goto out;
 577
 578     ASN1_MALLOC_ENCODE(PKCS12_AuthenticatedSafe, asdata.data, asdata.length,
 579                        &as, &size, ret);
 580     free_PKCS12_AuthenticatedSafe(&as);
 581     if (ret)
 582         return ret;
 583
 584     ret = der_parse_hex_heim_integer("03", &pfx.version);
 585     if (ret) {
 586         free(asdata.data);
 587         goto out;
 588     }
 589
 590     pfx.authSafe.content = calloc(1, sizeof(*pfx.authSafe.content));
 591
 592     ASN1_MALLOC_ENCODE(PKCS12_OctetString,
 593                        pfx.authSafe.content->data,
 594                        pfx.authSafe.content->length,
 595                        &asdata, &size, ret);
 596     free(asdata.data);
 597     if (ret)
 598         goto out;
 599
 600     ret = der_copy_oid(&asn1_oid_id_pkcs7_data, &pfx.authSafe.contentType);
 601     if (ret)
 602         goto out;
 603
 604     ASN1_MALLOC_ENCODE(PKCS12_PFX, asdata.data, asdata.length,
 605                        &pfx, &size, ret);
 606     if (ret)
 607         goto out;
 608
 609 #if 0
 610     const struct _hx509_password *pw;
 611
 612     pw = _hx509_lock_get_passwords(lock);
 613     if (pw != NULL) {
 614         pfx.macData = calloc(1, sizeof(*pfx.macData));
 615         if (pfx.macData == NULL) {
 616             ret = ENOMEM;
 617             hx509_set_error_string(context, 0, ret, "malloc out of memory");
 618             return ret;
 619         }
 620         if (pfx.macData == NULL) {
 621             free(asdata.data);
 622             goto out;
 623         }
 624     }
 625     ret = calculate_hash(&aspath, pw, pfx.macData);
 626 #endif
 627
 628     rk_dumpdata(p12->fn, asdata.data, asdata.length);
 629     free(asdata.data);
 630
 631 out:
 632     free_PKCS12_AuthenticatedSafe(&as);
 633     free_PKCS12_PFX(&pfx);
 634
 635     return ret;
 636 }
 637
 638
 639 static int
 640 p12_free(hx509_certs certs, void *data)
 641 {
 642     struct ks_pkcs12 *p12 = data;
 643     hx509_certs_free(&p12->certs);
 644     free(p12->fn);
 645     free(p12);
 646     return 0;
 647 }
 648
 649 static int
 650 p12_add(hx509_context context, hx509_certs certs, void *data, hx509_cert c)
 651 {
 652     struct ks_pkcs12 *p12 = data;
 653     return hx509_certs_add(context, p12->certs, c);
 654 }
 655
 656 static int
 657 p12_iter_start(hx509_context context,
 658                hx509_certs certs,
 659                void *data,
 660                void **cursor)
 661 {
 662     struct ks_pkcs12 *p12 = data;
 663     return hx509_certs_start_seq(context, p12->certs, cursor);
 664 }
 665
 666 static int
 667 p12_iter(hx509_context context,
 668          hx509_certs certs,
 669          void *data,
 670          void *cursor,
 671          hx509_cert *cert)
 672 {
 673     struct ks_pkcs12 *p12 = data;
 674     return hx509_certs_next_cert(context, p12->certs, cursor, cert);
 675 }
 676
 677 static int
 678 p12_iter_end(hx509_context context,
 679              hx509_certs certs,
 680              void *data,
 681              void *cursor)
 682 {
 683     struct ks_pkcs12 *p12 = data;
 684     return hx509_certs_end_seq(context, p12->certs, cursor);
 685 }
 686
 687 static struct hx509_keyset_ops keyset_pkcs12 = {
 688     "PKCS12",
 689     0,
 690     p12_init,
 691     p12_store,
 692     p12_free,
 693     p12_add,
 694     NULL,
 695     p12_iter_start,
 696     p12_iter,
 697     p12_iter_end
 698 };
 699
 700 void
 701 _hx509_ks_pkcs12_register(hx509_context context)
 702 {
 703     _hx509_ks_register(context, &keyset_pkcs12);
 704 }