source3/lib/tldap.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Infrastructure for async ldap client requests
   4    Copyright (C) Volker Lendecke 2009
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #include "replace.h"
  21 #include "tldap.h"
  22 #include "system/network.h"
  23 #include "system/locale.h"
  24 #include "lib/util/talloc_stack.h"
  25 #include "lib/util/samba_util.h"
  26 #include "lib/util_tsock.h"
  27 #include "../lib/util/asn1.h"
  28 #include "../lib/tsocket/tsocket.h"
  29 #include "../lib/util/tevent_unix.h"
  30
  31 static TLDAPRC tldap_simple_recv(struct tevent_req *req);
  32
  33 #define TEVENT_TLDAP_RC_MAGIC (0x87bcd26e)
  34
  35 bool tevent_req_ldap_error(struct tevent_req *req, TLDAPRC rc)
  36 {
  37         uint64_t err;
  38
  39         if (TLDAP_RC_IS_SUCCESS(rc)) {
  40                 return false;
  41         }
  42
  43         err = TEVENT_TLDAP_RC_MAGIC;
  44         err <<= 32;
  45         err |= TLDAP_RC_V(rc);
  46
  47         return tevent_req_error(req, err);
  48 }
  49
  50 bool tevent_req_is_ldap_error(struct tevent_req *req, TLDAPRC *perr)
  51 {
  52         enum tevent_req_state state;
  53         uint64_t err;
  54
  55         if (!tevent_req_is_error(req, &state, &err)) {
  56                 return false;
  57         }
  58         switch (state) {
  59         case TEVENT_REQ_TIMED_OUT:
  60                 *perr = TLDAP_TIMEOUT;
  61                 break;
  62         case TEVENT_REQ_NO_MEMORY:
  63                 *perr = TLDAP_NO_MEMORY;
  64                 break;
  65         case TEVENT_REQ_USER_ERROR:
  66                 if ((err >> 32) != TEVENT_TLDAP_RC_MAGIC) {
  67                         abort();
  68                 }
  69                 *perr = TLDAP_RC(err & 0xffffffff);
  70                 break;
  71         default:
  72                 *perr = TLDAP_OPERATIONS_ERROR;
  73                 break;
  74         }
  75         return true;
  76 }
  77
  78 struct tldap_ctx_attribute {
  79         char *name;
  80         void *ptr;
  81 };
  82
  83 struct tldap_context {
  84         int ld_version;
  85         struct tstream_context *conn;
  86         bool server_down;
  87         int msgid;
  88         struct tevent_queue *outgoing;
  89         struct tevent_req **pending;
  90
  91         /* For the sync wrappers we need something like get_last_error... */
  92         struct tldap_message *last_msg;
  93
  94         /* debug */
  95         void (*log_fn)(void *context, enum tldap_debug_level level,
  96                        const char *fmt, va_list ap);
  97         void *log_private;
  98
  99         struct tldap_ctx_attribute *ctx_attrs;
 100 };
 101
 102 struct tldap_message {
 103         struct asn1_data *data;
 104         uint8_t *inbuf;
 105         int type;
 106         int id;
 107
 108         /* RESULT_ENTRY */
 109         char *dn;
 110         struct tldap_attribute *attribs;
 111
 112         /* Error data sent by the server */
 113         TLDAPRC lderr;
 114         char *res_matcheddn;
 115         char *res_diagnosticmessage;
 116         char *res_referral;
 117         DATA_BLOB res_serverSaslCreds;
 118         struct tldap_control *res_sctrls;
 119
 120         /* Controls sent by the server */
 121         struct tldap_control *ctrls;
 122 };
 123
 124 void tldap_set_debug(struct tldap_context *ld,
 125                      void (*log_fn)(void *log_private,
 126                                     enum tldap_debug_level level,
 127                                     const char *fmt,
 128                                     va_list ap) PRINTF_ATTRIBUTE(3,0),
 129                      void *log_private)
 130 {
 131         ld->log_fn = log_fn;
 132         ld->log_private = log_private;
 133 }
 134
 135 static void tldap_debug(struct tldap_context *ld,
 136                          enum tldap_debug_level level,
 137                          const char *fmt, ...)
 138 {
 139         va_list ap;
 140         if (!ld) {
 141                 return;
 142         }
 143         if (ld->log_fn == NULL) {
 144                 return;
 145         }
 146         va_start(ap, fmt);
 147         ld->log_fn(ld->log_private, level, fmt, ap);
 148         va_end(ap);
 149 }
 150
 151 static int tldap_next_msgid(struct tldap_context *ld)
 152 {
 153         int result;
 154
 155         result = ld->msgid++;
 156         if (ld->msgid == 2147483647) {
 157                 ld->msgid = 1;
 158         }
 159         return result;
 160 }
 161
 162 struct tldap_context *tldap_context_create(TALLOC_CTX *mem_ctx, int fd)
 163 {
 164         struct tldap_context *ctx;
 165         int ret;
 166
 167         ctx = talloc_zero(mem_ctx, struct tldap_context);
 168         if (ctx == NULL) {
 169                 return NULL;
 170         }
 171         ret = tstream_bsd_existing_socket(ctx, fd, &ctx->conn);
 172         if (ret == -1) {
 173                 TALLOC_FREE(ctx);
 174                 return NULL;
 175         }
 176         ctx->msgid = 1;
 177         ctx->ld_version = 3;
 178         ctx->outgoing = tevent_queue_create(ctx, "tldap_outgoing");
 179         if (ctx->outgoing == NULL) {
 180                 TALLOC_FREE(ctx);
 181                 return NULL;
 182         }
 183         return ctx;
 184 }
 185
 186 bool tldap_connection_ok(struct tldap_context *ld)
 187 {
 188         if (ld == NULL) {
 189                 return false;
 190         }
 191         return !ld->server_down;
 192 }
 193
 194 static size_t tldap_pending_reqs(struct tldap_context *ld)
 195 {
 196         return talloc_array_length(ld->pending);
 197 }
 198
 199 struct tstream_context *tldap_get_tstream(struct tldap_context *ld)
 200 {
 201         return ld->conn;
 202 }
 203
 204 void tldap_set_tstream(struct tldap_context *ld,
 205                        struct tstream_context *stream)
 206 {
 207         ld->conn = stream;
 208 }
 209
 210 static struct tldap_ctx_attribute *tldap_context_findattr(
 211         struct tldap_context *ld, const char *name)
 212 {
 213         size_t i, num_attrs;
 214
 215         num_attrs = talloc_array_length(ld->ctx_attrs);
 216
 217         for (i=0; i<num_attrs; i++) {
 218                 if (strcmp(ld->ctx_attrs[i].name, name) == 0) {
 219                         return &ld->ctx_attrs[i];
 220                 }
 221         }
 222         return NULL;
 223 }
 224
 225 bool tldap_context_setattr(struct tldap_context *ld,
 226                            const char *name, const void *_pptr)
 227 {
 228         struct tldap_ctx_attribute *tmp, *attr;
 229         char *tmpname;
 230         int num_attrs;
 231         void **pptr = (void **)discard_const_p(void,_pptr);
 232
 233         attr = tldap_context_findattr(ld, name);
 234         if (attr != NULL) {
 235                 /*
 236                  * We don't actually delete attrs, we don't expect tons of
 237                  * attributes being shuffled around.
 238                  */
 239                 TALLOC_FREE(attr->ptr);
 240                 if (*pptr != NULL) {
 241                         attr->ptr = talloc_move(ld->ctx_attrs, pptr);
 242                         *pptr = NULL;
 243                 }
 244                 return true;
 245         }
 246
 247         tmpname = talloc_strdup(ld, name);
 248         if (tmpname == NULL) {
 249                 return false;
 250         }
 251
 252         num_attrs = talloc_array_length(ld->ctx_attrs);
 253
 254         tmp = talloc_realloc(ld, ld->ctx_attrs, struct tldap_ctx_attribute,
 255                              num_attrs+1);
 256         if (tmp == NULL) {
 257                 TALLOC_FREE(tmpname);
 258                 return false;
 259         }
 260         tmp[num_attrs].name = talloc_move(tmp, &tmpname);
 261         if (*pptr != NULL) {
 262                 tmp[num_attrs].ptr = talloc_move(tmp, pptr);
 263         } else {
 264                 tmp[num_attrs].ptr = NULL;
 265         }
 266         *pptr = NULL;
 267         ld->ctx_attrs = tmp;
 268         return true;
 269 }
 270
 271 void *tldap_context_getattr(struct tldap_context *ld, const char *name)
 272 {
 273         struct tldap_ctx_attribute *attr = tldap_context_findattr(ld, name);
 274
 275         if (attr == NULL) {
 276                 return NULL;
 277         }
 278         return attr->ptr;
 279 }
 280
 281 struct read_ldap_state {
 282         uint8_t *buf;
 283         bool done;
 284 };
 285
 286 static ssize_t read_ldap_more(uint8_t *buf, size_t buflen, void *private_data);
 287 static void read_ldap_done(struct tevent_req *subreq);
 288
 289 static struct tevent_req *read_ldap_send(TALLOC_CTX *mem_ctx,
 290                                          struct tevent_context *ev,
 291                                          struct tstream_context *conn)
 292 {
 293         struct tevent_req *req, *subreq;
 294         struct read_ldap_state *state;
 295
 296         req = tevent_req_create(mem_ctx, &state, struct read_ldap_state);
 297         if (req == NULL) {
 298                 return NULL;
 299         }
 300         state->done = false;
 301
 302         subreq = tstream_read_packet_send(state, ev, conn, 2, read_ldap_more,
 303                                           state);
 304         if (tevent_req_nomem(subreq, req)) {
 305                 return tevent_req_post(req, ev);
 306         }
 307         tevent_req_set_callback(subreq, read_ldap_done, req);
 308         return req;
 309 }
 310
 311 static ssize_t read_ldap_more(uint8_t *buf, size_t buflen, void *private_data)
 312 {
 313         struct read_ldap_state *state = talloc_get_type_abort(
 314                 private_data, struct read_ldap_state);
 315         size_t len;
 316         int i, lensize;
 317
 318         if (state->done) {
 319                 /* We've been here, we're done */
 320                 return 0;
 321         }
 322
 323         /*
 324          * From ldap.h: LDAP_TAG_MESSAGE is 0x30
 325          */
 326         if (buf[0] != 0x30) {
 327                 return -1;
 328         }
 329
 330         len = buf[1];
 331         if ((len & 0x80) == 0) {
 332                 state->done = true;
 333                 return len;
 334         }
 335
 336         lensize = (len & 0x7f);
 337         len = 0;
 338
 339         if (buflen == 2) {
 340                 /* Please get us the full length */
 341                 return lensize;
 342         }
 343         if (buflen > 2 + lensize) {
 344                 state->done = true;
 345                 return 0;
 346         }
 347         if (buflen != 2 + lensize) {
 348                 return -1;
 349         }
 350
 351         for (i=0; i<lensize; i++) {
 352                 len = (len << 8) | buf[2+i];
 353         }
 354         return len;
 355 }
 356
 357 static void read_ldap_done(struct tevent_req *subreq)
 358 {
 359         struct tevent_req *req = tevent_req_callback_data(
 360                 subreq, struct tevent_req);
 361         struct read_ldap_state *state = tevent_req_data(
 362                 req, struct read_ldap_state);
 363         ssize_t nread;
 364         int err;
 365
 366         nread = tstream_read_packet_recv(subreq, state, &state->buf, &err);
 367         TALLOC_FREE(subreq);
 368         if (nread == -1) {
 369                 tevent_req_error(req, err);
 370                 return;
 371         }
 372         tevent_req_done(req);
 373 }
 374
 375 static ssize_t read_ldap_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
 376                               uint8_t **pbuf, int *perrno)
 377 {
 378         struct read_ldap_state *state = tevent_req_data(
 379                 req, struct read_ldap_state);
 380
 381         if (tevent_req_is_unix_error(req, perrno)) {
 382                 return -1;
 383         }
 384         *pbuf = talloc_move(mem_ctx, &state->buf);
 385         return talloc_get_size(*pbuf);
 386 }
 387
 388 struct tldap_msg_state {
 389         struct tldap_context *ld;
 390         struct tevent_context *ev;
 391         int id;
 392         struct iovec iov;
 393
 394         struct asn1_data *data;
 395         uint8_t *inbuf;
 396 };
 397
 398 static bool tldap_push_controls(struct asn1_data *data,
 399                                 struct tldap_control *sctrls,
 400                                 int num_sctrls)
 401 {
 402         int i;
 403
 404         if ((sctrls == NULL) || (num_sctrls == 0)) {
 405                 return true;
 406         }
 407
 408         if (!asn1_push_tag(data, ASN1_CONTEXT(0))) return false;
 409
 410         for (i=0; i<num_sctrls; i++) {
 411                 struct tldap_control *c = &sctrls[i];
 412                 if (!asn1_push_tag(data, ASN1_SEQUENCE(0))) return false;
 413                 if (!asn1_write_OctetString(data, c->oid, strlen(c->oid))) return false;
 414                 if (c->critical) {
 415                         if (!asn1_write_BOOLEAN(data, true)) return false;
 416                 }
 417                 if (c->value.data != NULL) {
 418                         if (!asn1_write_OctetString(data, c->value.data,
 419                                                c->value.length)) return false;
 420                 }
 421                 if (!asn1_pop_tag(data)) return false; /* ASN1_SEQUENCE(0) */
 422         }
 423
 424         return asn1_pop_tag(data); /* ASN1_CONTEXT(0) */
 425 }
 426
 427 static void tldap_msg_sent(struct tevent_req *subreq);
 428 static void tldap_msg_received(struct tevent_req *subreq);
 429
 430 static struct tevent_req *tldap_msg_send(TALLOC_CTX *mem_ctx,
 431                                          struct tevent_context *ev,
 432                                          struct tldap_context *ld,
 433                                          int id, struct asn1_data *data,
 434                                          struct tldap_control *sctrls,
 435                                          int num_sctrls)
 436 {
 437         struct tevent_req *req, *subreq;
 438         struct tldap_msg_state *state;
 439         DATA_BLOB blob;
 440
 441         tldap_debug(ld, TLDAP_DEBUG_TRACE, "tldap_msg_send: sending msg %d\n",
 442                     id);
 443
 444         req = tevent_req_create(mem_ctx, &state, struct tldap_msg_state);
 445         if (req == NULL) {
 446                 return NULL;
 447         }
 448         state->ld = ld;
 449         state->ev = ev;
 450         state->id = id;
 451
 452         if (state->ld->server_down) {
 453                 tevent_req_ldap_error(req, TLDAP_SERVER_DOWN);
 454                 return tevent_req_post(req, ev);
 455         }
 456
 457         if (!tldap_push_controls(data, sctrls, num_sctrls)) {
 458                 tevent_req_ldap_error(req, TLDAP_ENCODING_ERROR);
 459                 return tevent_req_post(req, ev);
 460         }
 461
 462
 463         if (!asn1_pop_tag(data)) {
 464                 tevent_req_ldap_error(req, TLDAP_ENCODING_ERROR);
 465                 return tevent_req_post(req, ev);
 466         }
 467
 468         if (!asn1_blob(data, &blob)) {
 469                 tevent_req_ldap_error(req, TLDAP_ENCODING_ERROR);
 470                 return tevent_req_post(req, ev);
 471         }
 472
 473         state->iov.iov_base = (void *)blob.data;
 474         state->iov.iov_len = blob.length;
 475
 476         subreq = tstream_writev_queue_send(state, ev, ld->conn, ld->outgoing,
 477                                            &state->iov, 1);
 478         if (tevent_req_nomem(subreq, req)) {
 479                 return tevent_req_post(req, ev);
 480         }
 481         tevent_req_set_callback(subreq, tldap_msg_sent, req);
 482         return req;
 483 }
 484
 485 static void tldap_msg_unset_pending(struct tevent_req *req)
 486 {
 487         struct tldap_msg_state *state = tevent_req_data(
 488                 req, struct tldap_msg_state);
 489         struct tldap_context *ld = state->ld;
 490         int num_pending = tldap_pending_reqs(ld);
 491         int i;
 492
 493         tevent_req_set_cleanup_fn(req, NULL);
 494
 495         if (num_pending == 1) {
 496                 TALLOC_FREE(ld->pending);
 497                 return;
 498         }
 499
 500         for (i=0; i<num_pending; i++) {
 501                 if (req == ld->pending[i]) {
 502                         break;
 503                 }
 504         }
 505         if (i == num_pending) {
 506                 /*
 507                  * Something's seriously broken. Just returning here is the
 508                  * right thing nevertheless, the point of this routine is to
 509                  * remove ourselves from cli->pending.
 510                  */
 511                 return;
 512         }
 513
 514         /*
 515          * Remove ourselves from the cli->pending array
 516          */
 517         if (num_pending > 1) {
 518                 ld->pending[i] = ld->pending[num_pending-1];
 519         }
 520
 521         /*
 522          * No NULL check here, we're shrinking by sizeof(void *), and
 523          * talloc_realloc just adjusts the size for this.
 524          */
 525         ld->pending = talloc_realloc(NULL, ld->pending, struct tevent_req *,
 526                                      num_pending - 1);
 527 }
 528
 529 static void tldap_msg_cleanup(struct tevent_req *req,
 530                               enum tevent_req_state req_state)
 531 {
 532         switch (req_state) {
 533         case TEVENT_REQ_USER_ERROR:
 534         case TEVENT_REQ_RECEIVED:
 535                 tldap_msg_unset_pending(req);
 536                 return;
 537         default:
 538                 return;
 539         }
 540 }
 541
 542 static bool tldap_msg_set_pending(struct tevent_req *req)
 543 {
 544         struct tldap_msg_state *state = tevent_req_data(
 545                 req, struct tldap_msg_state);
 546         struct tldap_context *ld;
 547         struct tevent_req **pending;
 548         int num_pending;
 549         struct tevent_req *subreq;
 550
 551         ld = state->ld;
 552         num_pending = tldap_pending_reqs(ld);
 553
 554         pending = talloc_realloc(ld, ld->pending, struct tevent_req *,
 555                                  num_pending+1);
 556         if (pending == NULL) {
 557                 return false;
 558         }
 559         pending[num_pending] = req;
 560         ld->pending = pending;
 561         tevent_req_set_cleanup_fn(req, tldap_msg_cleanup);
 562
 563         if (num_pending > 0) {
 564                 return true;
 565         }
 566
 567         /*
 568          * We're the first one, add the read_ldap request that waits for the
 569          * answer from the server
 570          */
 571         subreq = read_ldap_send(ld->pending, state->ev, ld->conn);
 572         if (subreq == NULL) {
 573                 tldap_msg_unset_pending(req);
 574                 return false;
 575         }
 576         tevent_req_set_callback(subreq, tldap_msg_received, ld);
 577         return true;
 578 }
 579
 580 static void tldap_msg_sent(struct tevent_req *subreq)
 581 {
 582         struct tevent_req *req = tevent_req_callback_data(
 583                 subreq, struct tevent_req);
 584         struct tldap_msg_state *state = tevent_req_data(
 585                 req, struct tldap_msg_state);
 586         ssize_t nwritten;
 587         int err;
 588
 589         nwritten = tstream_writev_queue_recv(subreq, &err);
 590         TALLOC_FREE(subreq);
 591         if (nwritten == -1) {
 592                 state->ld->server_down = true;
 593                 tevent_req_ldap_error(req, TLDAP_SERVER_DOWN);
 594                 return;
 595         }
 596
 597         if (!tldap_msg_set_pending(req)) {
 598                 tevent_req_oom(req);
 599                 return;
 600         }
 601 }
 602
 603 static int tldap_msg_msgid(struct tevent_req *req)
 604 {
 605         struct tldap_msg_state *state = tevent_req_data(
 606                 req, struct tldap_msg_state);
 607
 608         return state->id;
 609 }
 610
 611 static void tldap_msg_received(struct tevent_req *subreq)
 612 {
 613         struct tldap_context *ld = tevent_req_callback_data(
 614                 subreq, struct tldap_context);
 615         struct tevent_req *req;
 616         struct tldap_msg_state *state;
 617         struct asn1_data *data;
 618         uint8_t *inbuf;
 619         ssize_t received;
 620         size_t num_pending;
 621         int i, err;
 622         TLDAPRC status;
 623         int id;
 624         uint8_t type;
 625         bool ok;
 626
 627         received = read_ldap_recv(subreq, talloc_tos(), &inbuf, &err);
 628         TALLOC_FREE(subreq);
 629         if (received == -1) {
 630                 ld->server_down = true;
 631                 status = TLDAP_SERVER_DOWN;
 632                 goto fail;
 633         }
 634
 635         data = asn1_init(talloc_tos());
 636         if (data == NULL) {
 637                 status = TLDAP_NO_MEMORY;
 638                 goto fail;
 639         }
 640         asn1_load_nocopy(data, inbuf, received);
 641
 642         ok = true;
 643         ok &= asn1_start_tag(data, ASN1_SEQUENCE(0));
 644         ok &= asn1_read_Integer(data, &id);
 645         ok &= asn1_peek_uint8(data, &type);
 646
 647         if (!ok) {
 648                 status = TLDAP_PROTOCOL_ERROR;
 649                 goto fail;
 650         }
 651
 652         tldap_debug(ld, TLDAP_DEBUG_TRACE, "tldap_msg_received: got msg %d "
 653                     "type %d\n", id, (int)type);
 654
 655         num_pending = talloc_array_length(ld->pending);
 656
 657         for (i=0; i<num_pending; i++) {
 658                 if (id == tldap_msg_msgid(ld->pending[i])) {
 659                         break;
 660                 }
 661         }
 662         if (i == num_pending) {
 663                 /* Dump unexpected reply */
 664                 tldap_debug(ld, TLDAP_DEBUG_WARNING, "tldap_msg_received: "
 665                             "No request pending for msg %d\n", id);
 666                 TALLOC_FREE(data);
 667                 TALLOC_FREE(inbuf);
 668                 goto done;
 669         }
 670
 671         req = ld->pending[i];
 672         state = tevent_req_data(req, struct tldap_msg_state);
 673
 674         state->inbuf = talloc_move(state, &inbuf);
 675         state->data = talloc_move(state, &data);
 676
 677         tldap_msg_unset_pending(req);
 678         num_pending = talloc_array_length(ld->pending);
 679
 680         tevent_req_done(req);
 681
 682  done:
 683         if (num_pending == 0) {
 684                 return;
 685         }
 686         if (talloc_array_length(ld->pending) > num_pending) {
 687                 /*
 688                  * The callback functions called from tevent_req_done() above
 689                  * have put something on the pending queue. We don't have to
 690                  * trigger the read_ldap_send(), tldap_msg_set_pending() has
 691                  * done it for us already.
 692                  */
 693                 return;
 694         }
 695
 696         state = tevent_req_data(ld->pending[0], struct tldap_msg_state);
 697         subreq = read_ldap_send(ld->pending, state->ev, ld->conn);
 698         if (subreq == NULL) {
 699                 status = TLDAP_NO_MEMORY;
 700                 goto fail;
 701         }
 702         tevent_req_set_callback(subreq, tldap_msg_received, ld);
 703         return;
 704
 705  fail:
 706         while (talloc_array_length(ld->pending) > 0) {
 707                 req = ld->pending[0];
 708                 state = tevent_req_data(req, struct tldap_msg_state);
 709                 tevent_req_defer_callback(req, state->ev);
 710                 tevent_req_ldap_error(req, status);
 711         }
 712 }
 713
 714 static TLDAPRC tldap_msg_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
 715                               struct tldap_message **pmsg)
 716 {
 717         struct tldap_msg_state *state = tevent_req_data(
 718                 req, struct tldap_msg_state);
 719         struct tldap_message *msg;
 720         TLDAPRC err;
 721         uint8_t msgtype;
 722
 723         if (tevent_req_is_ldap_error(req, &err)) {
 724                 return err;
 725         }
 726
 727         if (!asn1_peek_uint8(state->data, &msgtype)) {
 728                 return TLDAP_PROTOCOL_ERROR;
 729         }
 730
 731         if (pmsg == NULL) {
 732                 return TLDAP_SUCCESS;
 733         }
 734
 735         msg = talloc_zero(mem_ctx, struct tldap_message);
 736         if (msg == NULL) {
 737                 return TLDAP_NO_MEMORY;
 738         }
 739         msg->id = state->id;
 740
 741         msg->inbuf = talloc_move(msg, &state->inbuf);
 742         msg->data = talloc_move(msg, &state->data);
 743         msg->type = msgtype;
 744
 745         *pmsg = msg;
 746         return TLDAP_SUCCESS;
 747 }
 748
 749 struct tldap_req_state {
 750         int id;
 751         struct asn1_data *out;
 752         struct tldap_message *result;
 753 };
 754
 755 static struct tevent_req *tldap_req_create(TALLOC_CTX *mem_ctx,
 756                                            struct tldap_context *ld,
 757                                            struct tldap_req_state **pstate)
 758 {
 759         struct tevent_req *req;
 760         struct tldap_req_state *state;
 761
 762         req = tevent_req_create(mem_ctx, &state, struct tldap_req_state);
 763         if (req == NULL) {
 764                 return NULL;
 765         }
 766         state->out = asn1_init(state);
 767         if (state->out == NULL) {
 768                 goto err;
 769         }
 770         state->id = tldap_next_msgid(ld);
 771
 772         if (!asn1_push_tag(state->out, ASN1_SEQUENCE(0))) goto err;
 773         if (!asn1_write_Integer(state->out, state->id)) goto err;
 774
 775         *pstate = state;
 776         return req;
 777
 778   err:
 779
 780         TALLOC_FREE(req);
 781         return NULL;
 782 }
 783
 784 static void tldap_save_msg(struct tldap_context *ld, struct tevent_req *req)
 785 {
 786         struct tldap_req_state *state = tevent_req_data(
 787                 req, struct tldap_req_state);
 788
 789         TALLOC_FREE(ld->last_msg);
 790         ld->last_msg = talloc_move(ld, &state->result);
 791 }
 792
 793 static char *blob2string_talloc(TALLOC_CTX *mem_ctx, DATA_BLOB blob)
 794 {
 795         char *result = talloc_array(mem_ctx, char, blob.length+1);
 796
 797         if (result == NULL) {
 798                 return NULL;
 799         }
 800
 801         memcpy(result, blob.data, blob.length);
 802         result[blob.length] = '\0';
 803         return result;
 804 }
 805
 806 static bool asn1_read_OctetString_talloc(TALLOC_CTX *mem_ctx,
 807                                          struct asn1_data *data,
 808                                          char **presult)
 809 {
 810         DATA_BLOB string;
 811         char *result;
 812         if (!asn1_read_OctetString(data, mem_ctx, &string))
 813                 return false;
 814
 815         result = blob2string_talloc(mem_ctx, string);
 816
 817         data_blob_free(&string);
 818
 819         if (result == NULL) {
 820                 return false;
 821         }
 822         *presult = result;
 823         return true;
 824 }
 825
 826 static bool tldap_decode_controls(struct tldap_req_state *state);
 827
 828 static bool tldap_decode_response(struct tldap_req_state *state)
 829 {
 830         struct asn1_data *data = state->result->data;
 831         struct tldap_message *msg = state->result;
 832         int rc;
 833         bool ok = true;
 834
 835         ok &= asn1_read_enumerated(data, &rc);
 836         if (ok) {
 837                 msg->lderr = TLDAP_RC(rc);
 838         }
 839
 840         ok &= asn1_read_OctetString_talloc(msg, data, &msg->res_matcheddn);
 841         ok &= asn1_read_OctetString_talloc(msg, data,
 842                                            &msg->res_diagnosticmessage);
 843         if (!ok) return ok;
 844         if (asn1_peek_tag(data, ASN1_CONTEXT(3))) {
 845                 ok &= asn1_start_tag(data, ASN1_CONTEXT(3));
 846                 ok &= asn1_read_OctetString_talloc(msg, data,
 847                                                    &msg->res_referral);
 848                 ok &= asn1_end_tag(data);
 849         } else {
 850                 msg->res_referral = NULL;
 851         }
 852
 853         return ok;
 854 }
 855
 856 static void tldap_sasl_bind_done(struct tevent_req *subreq);
 857
 858 struct tevent_req *tldap_sasl_bind_send(TALLOC_CTX *mem_ctx,
 859                                         struct tevent_context *ev,
 860                                         struct tldap_context *ld,
 861                                         const char *dn,
 862                                         const char *mechanism,
 863                                         DATA_BLOB *creds,
 864                                         struct tldap_control *sctrls,
 865                                         int num_sctrls,
 866                                         struct tldap_control *cctrls,
 867                                         int num_cctrls)
 868 {
 869         struct tevent_req *req, *subreq;
 870         struct tldap_req_state *state;
 871
 872         req = tldap_req_create(mem_ctx, ld, &state);
 873         if (req == NULL) {
 874                 return NULL;
 875         }
 876
 877         if (dn == NULL) {
 878                 dn = "";
 879         }
 880
 881         if (!asn1_push_tag(state->out, TLDAP_REQ_BIND)) goto err;
 882         if (!asn1_write_Integer(state->out, ld->ld_version)) goto err;
 883         if (!asn1_write_OctetString(state->out, dn, strlen(dn))) goto err;
 884
 885         if (mechanism == NULL) {
 886                 if (!asn1_push_tag(state->out, ASN1_CONTEXT_SIMPLE(0))) goto err;
 887                 if (!asn1_write(state->out, creds->data, creds->length)) goto err;
 888                 if (!asn1_pop_tag(state->out)) goto err;
 889         } else {
 890                 if (!asn1_push_tag(state->out, ASN1_CONTEXT(3))) goto err;
 891                 if (!asn1_write_OctetString(state->out, mechanism,
 892                                        strlen(mechanism))) goto err;
 893                 if ((creds != NULL) && (creds->data != NULL)) {
 894                         if (!asn1_write_OctetString(state->out, creds->data,
 895                                                creds->length)) goto err;
 896                 }
 897                 if (!asn1_pop_tag(state->out)) goto err;
 898         }
 899
 900         if (!asn1_pop_tag(state->out)) goto err;
 901
 902         subreq = tldap_msg_send(state, ev, ld, state->id, state->out,
 903                                 sctrls, num_sctrls);
 904         if (tevent_req_nomem(subreq, req)) {
 905                 return tevent_req_post(req, ev);
 906         }
 907         tevent_req_set_callback(subreq, tldap_sasl_bind_done, req);
 908         return req;
 909
 910   err:
 911
 912         tevent_req_ldap_error(req, TLDAP_ENCODING_ERROR);
 913         return tevent_req_post(req, ev);
 914 }
 915
 916 static void tldap_sasl_bind_done(struct tevent_req *subreq)
 917 {
 918         struct tevent_req *req = tevent_req_callback_data(
 919                 subreq, struct tevent_req);
 920         struct tldap_req_state *state = tevent_req_data(
 921                 req, struct tldap_req_state);
 922         TLDAPRC rc;
 923         bool ok;
 924
 925         rc = tldap_msg_recv(subreq, state, &state->result);
 926         TALLOC_FREE(subreq);
 927         if (tevent_req_ldap_error(req, rc)) {
 928                 return;
 929         }
 930         if (state->result->type != TLDAP_RES_BIND) {
 931                 tevent_req_ldap_error(req, TLDAP_PROTOCOL_ERROR);
 932                 return;
 933         }
 934
 935         ok = asn1_start_tag(state->result->data, TLDAP_RES_BIND);
 936         ok &= tldap_decode_response(state);
 937
 938         if (asn1_peek_tag(state->result->data, ASN1_CONTEXT_SIMPLE(7))) {
 939                 int len;
 940
 941                 ok &= asn1_start_tag(state->result->data,
 942                                      ASN1_CONTEXT_SIMPLE(7));
 943                 if (!ok) {
 944                         goto decode_error;
 945                 }
 946
 947                 len = asn1_tag_remaining(state->result->data);
 948                 if (len == -1) {
 949                         goto decode_error;
 950                 }
 951
 952                 state->result->res_serverSaslCreds =
 953                         data_blob_talloc(state->result, NULL, len);
 954                 if (state->result->res_serverSaslCreds.data == NULL) {
 955                         goto decode_error;
 956                 }
 957
 958                 ok = asn1_read(state->result->data,
 959                                state->result->res_serverSaslCreds.data,
 960                                state->result->res_serverSaslCreds.length);
 961
 962                 ok &= asn1_end_tag(state->result->data);
 963         }
 964
 965         ok &= asn1_end_tag(state->result->data);
 966
 967         if (!ok) {
 968                 goto decode_error;
 969         }
 970
 971         if (!TLDAP_RC_IS_SUCCESS(state->result->lderr) &&
 972             !TLDAP_RC_EQUAL(state->result->lderr,
 973                             TLDAP_SASL_BIND_IN_PROGRESS)) {
 974                 tevent_req_ldap_error(req, state->result->lderr);
 975                 return;
 976         }
 977         tevent_req_done(req);
 978         return;
 979
 980 decode_error:
 981         tevent_req_ldap_error(req, TLDAP_DECODING_ERROR);
 982         return;
 983 }
 984
 985 TLDAPRC tldap_sasl_bind_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
 986                              DATA_BLOB *serverSaslCreds)
 987 {
 988         struct tldap_req_state *state = tevent_req_data(
 989                 req, struct tldap_req_state);
 990         TLDAPRC rc;
 991
 992         if (tevent_req_is_ldap_error(req, &rc)) {
 993                 return rc;
 994         }
 995
 996         if (serverSaslCreds != NULL) {
 997                 serverSaslCreds->data = talloc_move(
 998                         mem_ctx, &state->result->res_serverSaslCreds.data);
 999                 serverSaslCreds->length =
1000                         state->result->res_serverSaslCreds.length;
1001         }
1002
1003         return state->result->lderr;
1004 }
1005
1006 TLDAPRC tldap_sasl_bind(struct tldap_context *ld,
1007                         const char *dn,
1008                         const char *mechanism,
1009                         DATA_BLOB *creds,
1010                         struct tldap_control *sctrls,
1011                         int num_sctrls,
1012                         struct tldap_control *cctrls,
1013                         int num_cctrls,
1014                         TALLOC_CTX *mem_ctx,
1015                         DATA_BLOB *serverSaslCreds)
1016 {
1017         TALLOC_CTX *frame = talloc_stackframe();
1018         struct tevent_context *ev;
1019         struct tevent_req *req;
1020         TLDAPRC rc = TLDAP_NO_MEMORY;
1021
1022         ev = samba_tevent_context_init(frame);
1023         if (ev == NULL) {
1024                 goto fail;
1025         }
1026         req = tldap_sasl_bind_send(frame, ev, ld, dn, mechanism, creds,
1027                                    sctrls, num_sctrls, cctrls, num_cctrls);
1028         if (req == NULL) {
1029                 goto fail;
1030         }
1031         if (!tevent_req_poll(req, ev)) {
1032                 rc = TLDAP_OPERATIONS_ERROR;
1033                 goto fail;
1034         }
1035         rc = tldap_sasl_bind_recv(req, mem_ctx, serverSaslCreds);
1036         tldap_save_msg(ld, req);
1037  fail:
1038         TALLOC_FREE(frame);
1039         return rc;
1040 }
1041
1042 struct tevent_req *tldap_simple_bind_send(TALLOC_CTX *mem_ctx,
1043                                           struct tevent_context *ev,
1044                                           struct tldap_context *ld,
1045                                           const char *dn,
1046                                           const char *passwd)
1047 {
1048         DATA_BLOB cred;
1049
1050         if (passwd != NULL) {
1051                 cred.data = discard_const_p(uint8_t, passwd);
1052                 cred.length = strlen(passwd);
1053         } else {
1054                 cred.data = discard_const_p(uint8_t, "");
1055                 cred.length = 0;
1056         }
1057         return tldap_sasl_bind_send(mem_ctx, ev, ld, dn, NULL, &cred, NULL, 0,
1058                                     NULL, 0);
1059 }
1060
1061 TLDAPRC tldap_simple_bind_recv(struct tevent_req *req)
1062 {
1063         return tldap_sasl_bind_recv(req, NULL, NULL);
1064 }
1065
1066 TLDAPRC tldap_simple_bind(struct tldap_context *ld, const char *dn,
1067                           const char *passwd)
1068 {
1069         DATA_BLOB cred;
1070
1071         if (passwd != NULL) {
1072                 cred.data = discard_const_p(uint8_t, passwd);
1073                 cred.length = strlen(passwd);
1074         } else {
1075                 cred.data = discard_const_p(uint8_t, "");
1076                 cred.length = 0;
1077         }
1078         return tldap_sasl_bind(ld, dn, NULL, &cred, NULL, 0, NULL, 0,
1079                                NULL, NULL);
1080 }
1081
1082 /*****************************************************************************/
1083
1084 /* can't use isalpha() as only a strict set is valid for LDAP */
1085
1086 static bool tldap_is_alpha(char c)
1087 {
1088         return (((c >= 'a') && (c <= 'z')) || \
1089                 ((c >= 'A') && (c <= 'Z')));
1090 }
1091
1092 static bool tldap_is_adh(char c)
1093 {
1094         return tldap_is_alpha(c) || isdigit(c) || (c == '-');
1095 }
1096
1097 #define TLDAP_FILTER_AND  ASN1_CONTEXT(0)
1098 #define TLDAP_FILTER_OR   ASN1_CONTEXT(1)
1099 #define TLDAP_FILTER_NOT  ASN1_CONTEXT(2)
1100 #define TLDAP_FILTER_EQ   ASN1_CONTEXT(3)
1101 #define TLDAP_FILTER_SUB  ASN1_CONTEXT(4)
1102 #define TLDAP_FILTER_LE   ASN1_CONTEXT(5)
1103 #define TLDAP_FILTER_GE   ASN1_CONTEXT(6)
1104 #define TLDAP_FILTER_PRES ASN1_CONTEXT_SIMPLE(7)
1105 #define TLDAP_FILTER_APX  ASN1_CONTEXT(8)
1106 #define TLDAP_FILTER_EXT  ASN1_CONTEXT(9)
1107
1108 #define TLDAP_SUB_INI ASN1_CONTEXT_SIMPLE(0)
1109 #define TLDAP_SUB_ANY ASN1_CONTEXT_SIMPLE(1)
1110 #define TLDAP_SUB_FIN ASN1_CONTEXT_SIMPLE(2)
1111
1112
1113 /* oid's should be numerical only in theory,
1114  * but apparently some broken servers may have alphanum aliases instead.
1115  * Do like openldap libraries and allow alphanum aliases for oids, but
1116  * do not allow Tagging options in that case.
1117  */
1118 static bool tldap_is_attrdesc(const char *s, int len, bool no_tagopts)
1119 {
1120         bool is_oid = false;
1121         bool dot = false;
1122         int i;
1123
1124         /* first char has stricter rules */
1125         if (isdigit(*s)) {
1126                 is_oid = true;
1127         } else if (!tldap_is_alpha(*s)) {
1128                 /* bad first char */
1129                 return false;
1130         }
1131
1132         for (i = 1; i < len; i++) {
1133
1134                 if (is_oid) {
1135                         if (isdigit(s[i])) {
1136                                 dot = false;
1137                                 continue;
1138                         }
1139                         if (s[i] == '.') {
1140                                 if (dot) {
1141                                         /* malformed */
1142                                         return false;
1143                                 }
1144                                 dot = true;
1145                                 continue;
1146                         }
1147                 } else {
1148                         if (tldap_is_adh(s[i])) {
1149                                 continue;
1150                         }
1151                 }
1152
1153                 if (s[i] == ';') {
1154                         if (no_tagopts) {
1155                                 /* no tagging options */
1156                                 return false;
1157                         }
1158                         if (dot) {
1159                                 /* malformed */
1160                                 return false;
1161                         }
1162                         if ((i + 1) == len) {
1163                                 /* malformed */
1164                                 return false;
1165                         }
1166
1167                         is_oid = false;
1168                         continue;
1169                 }
1170         }
1171
1172         if (dot) {
1173                 /* malformed */
1174                 return false;
1175         }
1176
1177         return true;
1178 }
1179
1180 /* this function copies the value until the closing parenthesis is found. */
1181 static char *tldap_get_val(TALLOC_CTX *memctx,
1182                            const char *value, const char **_s)
1183 {
1184         const char *s = value;
1185
1186         /* find terminator */
1187         while (*s) {
1188                 s = strchr(s, ')');
1189                 if (s && (*(s - 1) == '\\')) {
1190                         continue;
1191                 }
1192                 break;
1193         }
1194         if (!s || !(*s == ')')) {
1195                 /* malformed filter */
1196                 return NULL;
1197         }
1198
1199         *_s = s;
1200
1201         return talloc_strndup(memctx, value, s - value);
1202 }
1203
1204 static int tldap_hex2char(const char *x)
1205 {
1206         if (isxdigit(x[0]) && isxdigit(x[1])) {
1207                 const char h1 = x[0], h2 = x[1];
1208                 int c = 0;
1209
1210                 if (h1 >= 'a') c = h1 - (int)'a' + 10;
1211                 else if (h1 >= 'A') c = h1 - (int)'A' + 10;
1212                 else if (h1 >= '0') c = h1 - (int)'0';
1213                 c = c << 4;
1214                 if (h2 >= 'a') c += h2 - (int)'a' + 10;
1215                 else if (h2 >= 'A') c += h2 - (int)'A' + 10;
1216                 else if (h2 >= '0') c += h2 - (int)'0';
1217
1218                 return c;
1219         }
1220
1221         return -1;
1222 }
1223
1224 static bool tldap_find_first_star(const char *val, const char **star)
1225 {
1226         const char *s;
1227
1228         for (s = val; *s; s++) {
1229                 switch (*s) {
1230                 case '\\':
1231                         if (isxdigit(s[1]) && isxdigit(s[2])) {
1232                                 s += 2;
1233                                 break;
1234                         }
1235                         /* not hex based escape, check older syntax */
1236                         switch (s[1]) {
1237                         case '(':
1238                         case ')':
1239                         case '*':
1240                         case '\\':
1241                                 s++;
1242                                 break;
1243                         default:
1244                                 /* invalid escape sequence */
1245                                 return false;
1246                         }
1247                         break;
1248                 case ')':
1249                         /* end of val, nothing found */
1250                         *star = s;
1251                         return true;
1252
1253                 case '*':
1254                         *star = s;
1255                         return true;
1256                 }
1257         }
1258
1259         /* string ended without closing parenthesis, filter is malformed */
1260         return false;
1261 }
1262
1263 static bool tldap_unescape_inplace(char *value, size_t *val_len)
1264 {
1265         int c, i, p;
1266
1267         for (i = 0,p = 0; i < *val_len; i++) {
1268
1269                 switch (value[i]) {
1270                 case '(':
1271                 case ')':
1272                 case '*':
1273                         /* these must be escaped */
1274                         return false;
1275
1276                 case '\\':
1277                         if (!value[i + 1]) {
1278                                 /* invalid EOL */
1279                                 return false;
1280                         }
1281                         i++;
1282
1283                         c = tldap_hex2char(&value[i]);
1284                         if (c >= 0 && c < 256) {
1285                                 value[p] = c;
1286                                 i++;
1287                                 p++;
1288                                 break;
1289                         }
1290
1291                         switch (value[i]) {
1292                         case '(':
1293                         case ')':
1294                         case '*':
1295                         case '\\':
1296                                 value[p] = value[i];
1297                                 p++;
1298                         default:
1299                                 /* invalid */
1300                                 return false;
1301                         }
1302                         break;
1303
1304                 default:
1305                         value[p] = value[i];
1306                         p++;
1307                 }
1308         }
1309         value[p] = '\0';
1310         *val_len = p;
1311         return true;
1312 }
1313
1314 static bool tldap_push_filter_basic(struct tldap_context *ld,
1315                                     struct asn1_data *data,
1316                                     const char **_s);
1317 static bool tldap_push_filter_substring(struct tldap_context *ld,
1318                                         struct asn1_data *data,
1319                                         const char *val,
1320                                         const char **_s);
1321 static bool tldap_push_filter_int(struct tldap_context *ld,
1322                                   struct asn1_data *data,
1323                                   const char **_s)
1324 {
1325         const char *s = *_s;
1326         bool ret;
1327
1328         if (*s != '(') {
1329                 tldap_debug(ld, TLDAP_DEBUG_ERROR,
1330                             "Incomplete or malformed filter\n");
1331                 return false;
1332         }
1333         s++;
1334
1335         /* we are right after a parenthesis,
1336          * find out what op we have at hand */
1337         switch (*s) {
1338         case '&':
1339                 tldap_debug(ld, TLDAP_DEBUG_TRACE, "Filter op: AND\n");
1340                 if (!asn1_push_tag(data, TLDAP_FILTER_AND)) return false;
1341                 s++;
1342                 break;
1343
1344         case '|':
1345                 tldap_debug(ld, TLDAP_DEBUG_TRACE, "Filter op: OR\n");
1346                 if (!asn1_push_tag(data, TLDAP_FILTER_OR)) return false;
1347                 s++;
1348                 break;
1349
1350         case '!':
1351                 tldap_debug(ld, TLDAP_DEBUG_TRACE, "Filter op: NOT\n");
1352                 if (!asn1_push_tag(data, TLDAP_FILTER_NOT)) return false;
1353                 s++;
1354                 ret = tldap_push_filter_int(ld, data, &s);
1355                 if (!ret) {
1356                         return false;
1357                 }
1358                 if (!asn1_pop_tag(data)) return false;
1359                 goto done;
1360
1361         case '(':
1362         case ')':
1363                 tldap_debug(ld, TLDAP_DEBUG_ERROR,
1364                             "Invalid parenthesis '%c'\n", *s);
1365                 return false;
1366
1367         case '\0':
1368                 tldap_debug(ld, TLDAP_DEBUG_ERROR,
1369                             "Invalid filter termination\n");
1370                 return false;
1371
1372         default:
1373                 ret = tldap_push_filter_basic(ld, data, &s);
1374                 if (!ret) {
1375                         return false;
1376                 }
1377                 goto done;
1378         }
1379
1380         /* only and/or filters get here.
1381          * go through the list of filters */
1382
1383         if (*s == ')') {
1384                 /* RFC 4526: empty and/or */
1385                 if (!asn1_pop_tag(data)) return false;
1386                 goto done;
1387         }
1388
1389         while (*s) {
1390                 ret = tldap_push_filter_int(ld, data, &s);
1391                 if (!ret) {
1392                         return false;
1393                 }
1394
1395                 if (*s == ')') {
1396                         /* end of list, return */
1397                         if (!asn1_pop_tag(data)) return false;
1398                         break;
1399                 }
1400         }
1401
1402 done:
1403         if (*s != ')') {
1404                 tldap_debug(ld, TLDAP_DEBUG_ERROR,
1405                             "Incomplete or malformed filter\n");
1406                 return false;
1407         }
1408         s++;
1409
1410         if (asn1_has_error(data)) {
1411                 return false;
1412         }
1413
1414         *_s = s;
1415         return true;
1416 }
1417
1418
1419 static bool tldap_push_filter_basic(struct tldap_context *ld,
1420                                     struct asn1_data *data,
1421                                     const char **_s)
1422 {
1423         TALLOC_CTX *tmpctx = talloc_tos();
1424         const char *s = *_s;
1425         const char *e;
1426         const char *eq;
1427         const char *val;
1428         const char *type;
1429         const char *dn;
1430         const char *rule;
1431         const char *star;
1432         size_t type_len = 0;
1433         char *uval;
1434         size_t uval_len;
1435         bool write_octect = true;
1436         bool ret;
1437
1438         eq = strchr(s, '=');
1439         if (!eq) {
1440                 tldap_debug(ld, TLDAP_DEBUG_ERROR,
1441                             "Invalid filter, missing equal sign\n");
1442                 return false;
1443         }
1444
1445         val = eq + 1;
1446         e = eq - 1;
1447
1448         switch (*e) {
1449         case '<':
1450                 if (!asn1_push_tag(data, TLDAP_FILTER_LE)) return false;
1451                 break;
1452
1453         case '>':
1454                 if (!asn1_push_tag(data, TLDAP_FILTER_GE)) return false;
1455                 break;
1456
1457         case '~':
1458                 if (!asn1_push_tag(data, TLDAP_FILTER_APX)) return false;
1459                 break;
1460
1461         case ':':
1462                 if (!asn1_push_tag(data, TLDAP_FILTER_EXT)) return false;
1463                 write_octect = false;
1464
1465                 type = NULL;
1466                 dn = NULL;
1467                 rule = NULL;
1468
1469                 if (*s == ':') { /* [:dn]:rule:= value */
1470                         if (s == e) {
1471                                 /* malformed filter */
1472                                 return false;
1473                         }
1474                         dn = s;
1475                 } else { /* type[:dn][:rule]:= value */
1476                         type = s;
1477                         dn = strchr(s, ':');
1478                         type_len = dn - type;
1479                         if (dn == e) { /* type:= value */
1480                                 dn = NULL;
1481                         }
1482                 }
1483                 if (dn) {
1484                         dn++;
1485
1486                         rule = strchr(dn, ':');
1487                         if (rule == NULL) {
1488                                 return false;
1489                         }
1490                         if ((rule == dn + 1) || rule + 1 == e) {
1491                                 /* malformed filter, contains "::" */
1492                                 return false;
1493                         }
1494
1495                         if (strncasecmp_m(dn, "dn:", 3) != 0) {
1496                                 if (rule == e) {
1497                                         rule = dn;
1498                                         dn = NULL;
1499                                 } else {
1500                                         /* malformed filter. With two
1501                                          * optionals, the first must be "dn"
1502                                          */
1503                                         return false;
1504                                 }
1505                         } else {
1506                                 if (rule == e) {
1507                                         rule = NULL;
1508                                 } else {
1509                                         rule++;
1510                                 }
1511                         }
1512                 }
1513
1514                 if (!type && !dn && !rule) {
1515                         /* malformed filter, there must be at least one */
1516                         return false;
1517                 }
1518
1519                 /*
1520                   MatchingRuleAssertion ::= SEQUENCE {
1521                   matchingRule    [1] MatchingRuleID OPTIONAL,
1522                   type      [2] AttributeDescription OPTIONAL,
1523                   matchValue      [3] AssertionValue,
1524                   dnAttributes    [4] BOOLEAN DEFAULT FALSE
1525                   }
1526                 */
1527
1528                 /* check and add rule */
1529                 if (rule) {
1530                         ret = tldap_is_attrdesc(rule, e - rule, true);
1531                         if (!ret) {
1532                                 return false;
1533                         }
1534                         if (!asn1_push_tag(data, ASN1_CONTEXT_SIMPLE(1))) return false;
1535                         if (!asn1_write(data, rule, e - rule)) return false;
1536                         if (!asn1_pop_tag(data)) return false;
1537                 }
1538
1539                 /* check and add type */
1540                 if (type) {
1541                         ret = tldap_is_attrdesc(type, type_len, false);
1542                         if (!ret) {
1543                                 return false;
1544                         }
1545                         if (!asn1_push_tag(data, ASN1_CONTEXT_SIMPLE(2))) return false;
1546                         if (!asn1_write(data, type, type_len)) return false;
1547                         if (!asn1_pop_tag(data)) return false;
1548                 }
1549
1550                 uval = tldap_get_val(tmpctx, val, _s);
1551                 if (!uval) {
1552                         return false;
1553                 }
1554                 uval_len = *_s - val;
1555                 ret = tldap_unescape_inplace(uval, &uval_len);
1556                 if (!ret) {
1557                         return false;
1558                 }
1559
1560                 if (!asn1_push_tag(data, ASN1_CONTEXT_SIMPLE(3))) return false;
1561                 if (!asn1_write(data, uval, uval_len)) return false;
1562                 if (!asn1_pop_tag(data)) return false;
1563
1564                 if (!asn1_push_tag(data, ASN1_CONTEXT_SIMPLE(4))) return false;
1565                 if (!asn1_write_uint8(data, dn?1:0)) return false;
1566                 if (!asn1_pop_tag(data)) return false;
1567                 break;
1568
1569         default:
1570                 e = eq;
1571
1572                 ret = tldap_is_attrdesc(s, e - s, false);
1573                 if (!ret) {
1574                         return false;
1575                 }
1576
1577                 if (strncmp(val, "*)", 2) == 0) {
1578                         /* presence */
1579                         if (!asn1_push_tag(data, TLDAP_FILTER_PRES)) return false;
1580                         if (!asn1_write(data, s, e - s)) return false;
1581                         *_s = val + 1;
1582                         write_octect = false;
1583                         break;
1584                 }
1585
1586                 ret = tldap_find_first_star(val, &star);
1587                 if (!ret) {
1588                         return false;
1589                 }
1590                 if (*star == '*') {
1591                         /* substring */
1592                         if (!asn1_push_tag(data, TLDAP_FILTER_SUB)) return false;
1593                         if (!asn1_write_OctetString(data, s, e - s)) return false;
1594                         ret = tldap_push_filter_substring(ld, data, val, &s);
1595                         if (!ret) {
1596                                 return false;
1597                         }
1598                         *_s = s;
1599                         write_octect = false;
1600                         break;
1601                 }
1602
1603                 /* if nothing else, then it is just equality */
1604                 if (!asn1_push_tag(data, TLDAP_FILTER_EQ)) return false;
1605                 write_octect = true;
1606                 break;
1607         }
1608
1609         if (write_octect) {
1610                 uval = tldap_get_val(tmpctx, val, _s);
1611                 if (!uval) {
1612                         return false;
1613                 }
1614                 uval_len = *_s - val;
1615                 ret = tldap_unescape_inplace(uval, &uval_len);
1616                 if (!ret) {
1617                         return false;
1618                 }
1619
1620                 if (!asn1_write_OctetString(data, s, e - s)) return false;
1621                 if (!asn1_write_OctetString(data, uval, uval_len)) return false;
1622         }
1623
1624         if (asn1_has_error(data)) {
1625                 return false;
1626         }
1627         return asn1_pop_tag(data);
1628 }
1629
1630 static bool tldap_push_filter_substring(struct tldap_context *ld,
1631                                         struct asn1_data *data,
1632                                         const char *val,
1633                                         const char **_s)
1634 {
1635         TALLOC_CTX *tmpctx = talloc_tos();
1636         bool initial = true;
1637         const char *star;
1638         char *chunk;
1639         size_t chunk_len;
1640         bool ret;
1641
1642         /*
1643           SubstringFilter ::= SEQUENCE {
1644                   type      AttributeDescription,
1645                   -- at least one must be present
1646                   substrings      SEQUENCE OF CHOICE {
1647                           initial [0] LDAPString,
1648                           any     [1] LDAPString,
1649                           final   [2] LDAPString } }
1650         */
1651         if (!asn1_push_tag(data, ASN1_SEQUENCE(0))) return false;
1652
1653         do {
1654                 ret = tldap_find_first_star(val, &star);
1655                 if (!ret) {
1656                         return false;
1657                 }
1658                 chunk_len = star - val;
1659
1660                 switch (*star) {
1661                 case '*':
1662                         if (!initial && chunk_len == 0) {
1663                                 /* found '**', which is illegal */
1664                                 return false;
1665                         }
1666                         break;
1667                 case ')':
1668                         if (initial) {
1669                                 /* no stars ?? */
1670                                 return false;
1671                         }
1672                         /* we are done */
1673                         break;
1674                 default:
1675                         /* ?? */
1676                         return false;
1677                 }
1678
1679                 if (initial && chunk_len == 0) {
1680                         val = star + 1;
1681                         initial = false;
1682                         continue;
1683                 }
1684
1685                 chunk = talloc_strndup(tmpctx, val, chunk_len);
1686                 if (!chunk) {
1687                         return false;
1688                 }
1689                 ret = tldap_unescape_inplace(chunk, &chunk_len);
1690                 if (!ret) {
1691                         return false;
1692                 }
1693                 switch (*star) {
1694                 case '*':
1695                         if (initial) {
1696                                 if (!asn1_push_tag(data, TLDAP_SUB_INI)) return false;
1697                                 initial = false;
1698                         } else {
1699                                 if (!asn1_push_tag(data, TLDAP_SUB_ANY)) return false;
1700                         }
1701                         break;
1702                 case ')':
1703                         if (!asn1_push_tag(data, TLDAP_SUB_FIN)) return false;
1704                         break;
1705                 default:
1706                         /* ?? */
1707                         return false;
1708                 }
1709                 if (!asn1_write(data, chunk, chunk_len)) return false;
1710                 if (!asn1_pop_tag(data)) return false;
1711
1712                 val = star + 1;
1713
1714         } while (*star == '*');
1715
1716         *_s = star;
1717
1718         /* end of sequence */
1719         return asn1_pop_tag(data);
1720 }
1721
1722 /* NOTE: although openldap libraries allow for spaces in some places, mosly
1723  * around parenthesis, we do not allow any spaces (except in values of
1724  * course) as I couldn't fine any place in RFC 4512 or RFC 4515 where
1725  * leading or trailing spaces where allowed.
1726  */
1727 static bool tldap_push_filter(struct tldap_context *ld,
1728                               struct asn1_data *data,
1729                               const char *filter)
1730 {
1731         const char *s = filter;
1732         bool ret;
1733
1734         ret = tldap_push_filter_int(ld, data, &s);
1735         if (ret && *s) {
1736                 tldap_debug(ld, TLDAP_DEBUG_ERROR,
1737                             "Incomplete or malformed filter\n");
1738                 return false;
1739         }
1740         return ret;
1741 }
1742
1743 /*****************************************************************************/
1744
1745 static void tldap_search_done(struct tevent_req *subreq);
1746
1747 struct tevent_req *tldap_search_send(TALLOC_CTX *mem_ctx,
1748                                      struct tevent_context *ev,
1749                                      struct tldap_context *ld,
1750                                      const char *base, int scope,
1751                                      const char *filter,
1752                                      const char **attrs,
1753                                      int num_attrs,
1754                                      int attrsonly,
1755                                      struct tldap_control *sctrls,
1756                                      int num_sctrls,
1757                                      struct tldap_control *cctrls,
1758                                      int num_cctrls,
1759                                      int timelimit,
1760                                      int sizelimit,
1761                                      int deref)
1762 {
1763         struct tevent_req *req, *subreq;
1764         struct tldap_req_state *state;
1765         int i;
1766
1767         req = tldap_req_create(mem_ctx, ld, &state);
1768         if (req == NULL) {
1769                 return NULL;
1770         }
1771
1772         if (!asn1_push_tag(state->out, TLDAP_REQ_SEARCH)) goto encoding_error;
1773         if (!asn1_write_OctetString(state->out, base, strlen(base))) goto encoding_error;
1774         if (!asn1_write_enumerated(state->out, scope)) goto encoding_error;
1775         if (!asn1_write_enumerated(state->out, deref)) goto encoding_error;
1776         if (!asn1_write_Integer(state->out, sizelimit)) goto encoding_error;
1777         if (!asn1_write_Integer(state->out, timelimit)) goto encoding_error;
1778         if (!asn1_write_BOOLEAN(state->out, attrsonly)) goto encoding_error;
1779
1780         if (!tldap_push_filter(ld, state->out, filter)) {
1781                 goto encoding_error;
1782         }
1783
1784         if (!asn1_push_tag(state->out, ASN1_SEQUENCE(0))) goto encoding_error;
1785         for (i=0; i<num_attrs; i++) {
1786                 if (!asn1_write_OctetString(state->out, attrs[i], strlen(attrs[i]))) goto encoding_error;
1787         }
1788         if (!asn1_pop_tag(state->out)) goto encoding_error;
1789         if (!asn1_pop_tag(state->out)) goto encoding_error;
1790
1791         subreq = tldap_msg_send(state, ev, ld, state->id, state->out,
1792                                 sctrls, num_sctrls);
1793         if (tevent_req_nomem(subreq, req)) {
1794                 return tevent_req_post(req, ev);
1795         }
1796         tevent_req_set_callback(subreq, tldap_search_done, req);
1797         return req;
1798
1799  encoding_error:
1800         tevent_req_ldap_error(req, TLDAP_ENCODING_ERROR);
1801         return tevent_req_post(req, ev);
1802 }
1803
1804 static void tldap_search_done(struct tevent_req *subreq)
1805 {
1806         struct tevent_req *req = tevent_req_callback_data(
1807                 subreq, struct tevent_req);
1808         struct tldap_req_state *state = tevent_req_data(
1809                 req, struct tldap_req_state);
1810         TLDAPRC rc;
1811
1812         rc = tldap_msg_recv(subreq, state, &state->result);
1813         if (tevent_req_ldap_error(req, rc)) {
1814                 return;
1815         }
1816         switch (state->result->type) {
1817         case TLDAP_RES_SEARCH_ENTRY:
1818         case TLDAP_RES_SEARCH_REFERENCE:
1819                 if (!tldap_msg_set_pending(subreq)) {
1820                         tevent_req_oom(req);
1821                         return;
1822                 }
1823                 tevent_req_notify_callback(req);
1824                 break;
1825         case TLDAP_RES_SEARCH_RESULT:
1826                 TALLOC_FREE(subreq);
1827                 if (!asn1_start_tag(state->result->data,
1828                                     state->result->type) ||
1829                     !tldap_decode_response(state) ||
1830                     !asn1_end_tag(state->result->data) ||
1831                     !tldap_decode_controls(state)) {
1832                         tevent_req_ldap_error(req, TLDAP_DECODING_ERROR);
1833                         return;
1834                 }
1835                 tevent_req_done(req);
1836                 break;
1837         default:
1838                 tevent_req_ldap_error(req, TLDAP_PROTOCOL_ERROR);
1839                 return;
1840         }
1841 }
1842
1843 TLDAPRC tldap_search_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
1844                           struct tldap_message **pmsg)
1845 {
1846         struct tldap_req_state *state = tevent_req_data(
1847                 req, struct tldap_req_state);
1848         TLDAPRC rc;
1849
1850         if (!tevent_req_is_in_progress(req)
1851             && tevent_req_is_ldap_error(req, &rc)) {
1852                 return rc;
1853         }
1854
1855         if (tevent_req_is_in_progress(req)) {
1856                 switch (state->result->type) {
1857                 case TLDAP_RES_SEARCH_ENTRY:
1858                 case TLDAP_RES_SEARCH_REFERENCE:
1859                         break;
1860                 default:
1861                         return TLDAP_OPERATIONS_ERROR;
1862                 }
1863         }
1864
1865         *pmsg = talloc_move(mem_ctx, &state->result);
1866         return TLDAP_SUCCESS;
1867 }
1868
1869 struct tldap_search_all_state {
1870         struct tldap_message **msgs;
1871         struct tldap_message *result;
1872 };
1873
1874 static void tldap_search_all_done(struct tevent_req *subreq);
1875
1876 struct tevent_req *tldap_search_all_send(
1877         TALLOC_CTX *mem_ctx, struct tevent_context *ev,
1878         struct tldap_context *ld, const char *base, int scope,
1879         const char *filter, const char **attrs, int num_attrs, int attrsonly,
1880         struct tldap_control *sctrls, int num_sctrls,
1881         struct tldap_control *cctrls, int num_cctrls,
1882         int timelimit, int sizelimit, int deref)
1883 {
1884         struct tevent_req *req, *subreq;
1885         struct tldap_search_all_state *state;
1886
1887         req = tevent_req_create(mem_ctx, &state,
1888                                 struct tldap_search_all_state);
1889         if (req == NULL) {
1890                 return NULL;
1891         }
1892
1893         subreq = tldap_search_send(state, ev, ld, base, scope, filter,
1894                                    attrs, num_attrs, attrsonly,
1895                                    sctrls, num_sctrls, cctrls, num_cctrls,
1896                                    timelimit, sizelimit, deref);
1897         if (tevent_req_nomem(subreq, req)) {
1898                 return tevent_req_post(req, ev);
1899         }
1900         tevent_req_set_callback(subreq, tldap_search_all_done, req);
1901         return req;
1902 }
1903
1904 static void tldap_search_all_done(struct tevent_req *subreq)
1905 {
1906         struct tevent_req *req = tevent_req_callback_data(
1907                 subreq, struct tevent_req);
1908         struct tldap_search_all_state *state = tevent_req_data(
1909                 req, struct tldap_search_all_state);
1910         struct tldap_message *msg, **tmp;
1911         size_t num_msgs;
1912         TLDAPRC rc;
1913         int msgtype;
1914
1915         rc = tldap_search_recv(subreq, state, &msg);
1916         /* No TALLOC_FREE(subreq), this is multi-step */
1917         if (tevent_req_ldap_error(req, rc)) {
1918                 TALLOC_FREE(subreq);
1919                 return;
1920         }
1921
1922         msgtype = tldap_msg_type(msg);
1923         if (msgtype == TLDAP_RES_SEARCH_RESULT) {
1924                 state->result = msg;
1925                 tevent_req_done(req);
1926                 return;
1927         }
1928
1929         num_msgs = talloc_array_length(state->msgs);
1930
1931         tmp = talloc_realloc(state, state->msgs, struct tldap_message *,
1932                              num_msgs + 1);
1933         if (tevent_req_nomem(tmp, req)) {
1934                 return;
1935         }
1936         state->msgs = tmp;
1937         state->msgs[num_msgs] = talloc_move(state->msgs, &msg);
1938 }
1939
1940 TLDAPRC tldap_search_all_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
1941                               struct tldap_message ***msgs,
1942                               struct tldap_message **result)
1943 {
1944         struct tldap_search_all_state *state = tevent_req_data(
1945                 req, struct tldap_search_all_state);
1946         TLDAPRC rc;
1947
1948         if (tevent_req_is_ldap_error(req, &rc)) {
1949                 return rc;
1950         }
1951
1952         if (msgs != NULL) {
1953                 *msgs = talloc_move(mem_ctx, &state->msgs);
1954         }
1955         if (result != NULL) {
1956                 *result = talloc_move(mem_ctx, &state->result);
1957         }
1958
1959         return TLDAP_SUCCESS;
1960 }
1961
1962 TLDAPRC tldap_search(struct tldap_context *ld,
1963                      const char *base, int scope, const char *filter,
1964                      const char **attrs, int num_attrs, int attrsonly,
1965                      struct tldap_control *sctrls, int num_sctrls,
1966                      struct tldap_control *cctrls, int num_cctrls,
1967                      int timelimit, int sizelimit, int deref,
1968                      TALLOC_CTX *mem_ctx, struct tldap_message ***pmsgs)
1969 {
1970         TALLOC_CTX *frame;
1971         struct tevent_context *ev;
1972         struct tevent_req *req;
1973         TLDAPRC rc = TLDAP_NO_MEMORY;
1974         struct tldap_message **msgs;
1975         struct tldap_message *result;
1976
1977         if (tldap_pending_reqs(ld)) {
1978                 return TLDAP_BUSY;
1979         }
1980
1981         frame = talloc_stackframe();
1982
1983         ev = samba_tevent_context_init(frame);
1984         if (ev == NULL) {
1985                 goto fail;
1986         }
1987         req = tldap_search_all_send(frame, ev, ld, base, scope, filter,
1988                                     attrs, num_attrs, attrsonly,
1989                                     sctrls, num_sctrls, cctrls, num_cctrls,
1990                                     timelimit, sizelimit, deref);
1991         if (req == NULL) {
1992                 goto fail;
1993         }
1994         if (!tevent_req_poll(req, ev)) {
1995                 rc = TLDAP_OPERATIONS_ERROR;
1996                 goto fail;
1997         }
1998         rc = tldap_search_all_recv(req, frame, &msgs, &result);
1999         TALLOC_FREE(req);
2000         if (!TLDAP_RC_IS_SUCCESS(rc)) {
2001                 goto fail;
2002         }
2003
2004         TALLOC_FREE(ld->last_msg);
2005         ld->last_msg = talloc_move(ld, &result);
2006
2007         if (pmsgs != NULL) {
2008                 *pmsgs = talloc_move(mem_ctx, &msgs);
2009         }
2010 fail:
2011         TALLOC_FREE(frame);
2012         return rc;
2013 }
2014
2015 static bool tldap_parse_search_entry(struct tldap_message *msg)
2016 {
2017         int num_attribs = 0;
2018
2019         if (msg->type != TLDAP_RES_SEARCH_ENTRY) {
2020                 return false;
2021         }
2022         if (!asn1_start_tag(msg->data, TLDAP_RES_SEARCH_ENTRY)) {
2023                 return false;
2024         }
2025
2026         /* dn */
2027
2028         if (!asn1_read_OctetString_talloc(msg, msg->data, &msg->dn)) return false;
2029
2030         if (msg->dn == NULL) {
2031                 return false;
2032         }
2033
2034         /*
2035          * Attributes: We overallocate msg->attribs by one, so that while
2036          * looping over the attributes we can directly parse into the last
2037          * array element. Same for the values in the inner loop.
2038          */
2039
2040         msg->attribs = talloc_array(msg, struct tldap_attribute, 1);
2041         if (msg->attribs == NULL) {
2042                 return false;
2043         }
2044
2045         if (!asn1_start_tag(msg->data, ASN1_SEQUENCE(0))) return false;
2046         while (asn1_peek_tag(msg->data, ASN1_SEQUENCE(0))) {
2047                 struct tldap_attribute *attrib;
2048                 int num_values = 0;
2049
2050                 attrib = &msg->attribs[num_attribs];
2051                 attrib->values = talloc_array(msg->attribs, DATA_BLOB, 1);
2052                 if (attrib->values == NULL) {
2053                         return false;
2054                 }
2055                 if (!asn1_start_tag(msg->data, ASN1_SEQUENCE(0))) return false;
2056                 if (!asn1_read_OctetString_talloc(msg->attribs, msg->data,
2057                                              &attrib->name)) return false;
2058                 if (!asn1_start_tag(msg->data, ASN1_SET)) return false;
2059
2060                 while (asn1_peek_tag(msg->data, ASN1_OCTET_STRING)) {
2061                         if (!asn1_read_OctetString(msg->data, msg,
2062                                               &attrib->values[num_values])) return false;
2063
2064                         attrib->values = talloc_realloc(
2065                                 msg->attribs, attrib->values, DATA_BLOB,
2066                                 num_values + 2);
2067                         if (attrib->values == NULL) {
2068                                 return false;
2069                         }
2070                         num_values += 1;
2071                 }
2072                 attrib->values = talloc_realloc(msg->attribs, attrib->values,
2073                                                 DATA_BLOB, num_values);
2074                 attrib->num_values = num_values;
2075
2076                 if (!asn1_end_tag(msg->data)) return false; /* ASN1_SET */
2077                 if (!asn1_end_tag(msg->data)) return false; /* ASN1_SEQUENCE(0) */
2078                 msg->attribs = talloc_realloc(
2079                         msg, msg->attribs, struct tldap_attribute,
2080                         num_attribs + 2);
2081                 if (msg->attribs == NULL) {
2082                         return false;
2083                 }
2084                 num_attribs += 1;
2085         }
2086         msg->attribs = talloc_realloc(
2087                 msg, msg->attribs, struct tldap_attribute, num_attribs);
2088         return asn1_end_tag(msg->data);
2089 }
2090
2091 bool tldap_entry_dn(struct tldap_message *msg, char **dn)
2092 {
2093         if ((msg->dn == NULL) && (!tldap_parse_search_entry(msg))) {
2094                 return false;
2095         }
2096         *dn = msg->dn;
2097         return true;
2098 }
2099
2100 bool tldap_entry_attributes(struct tldap_message *msg,
2101                             struct tldap_attribute **attributes,
2102                             int *num_attributes)
2103 {
2104         if ((msg->dn == NULL) && (!tldap_parse_search_entry(msg))) {
2105                 return false;
2106         }
2107         *attributes = msg->attribs;
2108         *num_attributes = talloc_array_length(msg->attribs);
2109         return true;
2110 }
2111
2112 static bool tldap_decode_controls(struct tldap_req_state *state)
2113 {
2114         struct tldap_message *msg = state->result;
2115         struct asn1_data *data = msg->data;
2116         struct tldap_control *sctrls = NULL;
2117         int num_controls = 0;
2118         bool ret = false;
2119
2120         msg->res_sctrls = NULL;
2121
2122         if (!asn1_peek_tag(data, ASN1_CONTEXT(0))) {
2123                 return true;
2124         }
2125
2126         if (!asn1_start_tag(data, ASN1_CONTEXT(0))) goto out;
2127
2128         while (asn1_peek_tag(data, ASN1_SEQUENCE(0))) {
2129                 struct tldap_control *c;
2130                 char *oid = NULL;
2131
2132                 sctrls = talloc_realloc(msg, sctrls, struct tldap_control,
2133                                         num_controls + 1);
2134                 if (sctrls == NULL) {
2135                         goto out;
2136                 }
2137                 c = &sctrls[num_controls];
2138
2139                 if (!asn1_start_tag(data, ASN1_SEQUENCE(0))) goto out;
2140                 if (!asn1_read_OctetString_talloc(msg, data, &oid)) goto out;
2141                 if (asn1_has_error(data) || (oid == NULL)) {
2142                         goto out;
2143                 }
2144                 c->oid = oid;
2145                 if (asn1_peek_tag(data, ASN1_BOOLEAN)) {
2146                         if (!asn1_read_BOOLEAN(data, &c->critical)) goto out;
2147                 } else {
2148                         c->critical = false;
2149                 }
2150                 c->value = data_blob_null;
2151                 if (asn1_peek_tag(data, ASN1_OCTET_STRING) &&
2152                     !asn1_read_OctetString(data, msg, &c->value)) {
2153                         goto out;
2154                 }
2155                 if (!asn1_end_tag(data)) goto out; /* ASN1_SEQUENCE(0) */
2156
2157                 num_controls += 1;
2158         }
2159
2160         if (!asn1_end_tag(data)) goto out;      /* ASN1_CONTEXT(0) */
2161
2162         ret = true;
2163
2164  out:
2165
2166         if (ret) {
2167                 msg->res_sctrls = sctrls;
2168         } else {
2169                 TALLOC_FREE(sctrls);
2170         }
2171         return ret;
2172 }
2173
2174 static void tldap_simple_done(struct tevent_req *subreq, int type)
2175 {
2176         struct tevent_req *req = tevent_req_callback_data(
2177                 subreq, struct tevent_req);
2178         struct tldap_req_state *state = tevent_req_data(
2179                 req, struct tldap_req_state);
2180         TLDAPRC rc;
2181
2182         rc = tldap_msg_recv(subreq, state, &state->result);
2183         TALLOC_FREE(subreq);
2184         if (tevent_req_ldap_error(req, rc)) {
2185                 return;
2186         }
2187         if (state->result->type != type) {
2188                 tevent_req_ldap_error(req, TLDAP_PROTOCOL_ERROR);
2189                 return;
2190         }
2191         if (!asn1_start_tag(state->result->data, state->result->type) ||
2192             !tldap_decode_response(state) ||
2193             !asn1_end_tag(state->result->data) ||
2194             !tldap_decode_controls(state)) {
2195                 tevent_req_ldap_error(req, TLDAP_DECODING_ERROR);
2196                 return;
2197         }
2198         if (!TLDAP_RC_IS_SUCCESS(state->result->lderr)) {
2199                 tevent_req_ldap_error(req, state->result->lderr);
2200                 return;
2201         }
2202         tevent_req_done(req);
2203 }
2204
2205 static TLDAPRC tldap_simple_recv(struct tevent_req *req)
2206 {
2207         TLDAPRC rc;
2208         if (tevent_req_is_ldap_error(req, &rc)) {
2209                 return rc;
2210         }
2211         return TLDAP_SUCCESS;
2212 }
2213
2214 static void tldap_add_done(struct tevent_req *subreq);
2215
2216 struct tevent_req *tldap_add_send(TALLOC_CTX *mem_ctx,
2217                                   struct tevent_context *ev,
2218                                   struct tldap_context *ld,
2219                                   const char *dn,
2220                                   struct tldap_mod *attributes,
2221                                   int num_attributes,
2222                                   struct tldap_control *sctrls,
2223                                   int num_sctrls,
2224                                   struct tldap_control *cctrls,
2225                                   int num_cctrls)
2226 {
2227         struct tevent_req *req, *subreq;
2228         struct tldap_req_state *state;
2229         int i, j;
2230
2231         req = tldap_req_create(mem_ctx, ld, &state);
2232         if (req == NULL) {
2233                 return NULL;
2234         }
2235
2236         if (!asn1_push_tag(state->out, TLDAP_REQ_ADD)) goto err;
2237         if (!asn1_write_OctetString(state->out, dn, strlen(dn))) goto err;
2238         if (!asn1_push_tag(state->out, ASN1_SEQUENCE(0))) goto err;
2239
2240         for (i=0; i<num_attributes; i++) {
2241                 struct tldap_mod *attrib = &attributes[i];
2242                 if (!asn1_push_tag(state->out, ASN1_SEQUENCE(0))) goto err;
2243                 if (!asn1_write_OctetString(state->out, attrib->attribute,
2244                                        strlen(attrib->attribute))) goto err;
2245                 if (!asn1_push_tag(state->out, ASN1_SET)) goto err;
2246                 for (j=0; j<attrib->num_values; j++) {
2247                         if (!asn1_write_OctetString(state->out,
2248                                                attrib->values[j].data,
2249                                                attrib->values[j].length)) goto err;
2250                 }
2251                 if (!asn1_pop_tag(state->out)) goto err;
2252                 if (!asn1_pop_tag(state->out)) goto err;
2253         }
2254
2255         if (!asn1_pop_tag(state->out)) goto err;
2256         if (!asn1_pop_tag(state->out)) goto err;
2257
2258         subreq = tldap_msg_send(state, ev, ld, state->id, state->out,
2259                                 sctrls, num_sctrls);
2260         if (tevent_req_nomem(subreq, req)) {
2261                 return tevent_req_post(req, ev);
2262         }
2263         tevent_req_set_callback(subreq, tldap_add_done, req);
2264         return req;
2265
2266   err:
2267
2268         tevent_req_ldap_error(req, TLDAP_ENCODING_ERROR);
2269         return tevent_req_post(req, ev);
2270 }
2271
2272 static void tldap_add_done(struct tevent_req *subreq)
2273 {
2274         tldap_simple_done(subreq, TLDAP_RES_ADD);
2275 }
2276
2277 TLDAPRC tldap_add_recv(struct tevent_req *req)
2278 {
2279         return tldap_simple_recv(req);
2280 }
2281
2282 TLDAPRC tldap_add(struct tldap_context *ld, const char *dn,
2283                   struct tldap_mod *attributes, int num_attributes,
2284                   struct tldap_control *sctrls, int num_sctrls,
2285                   struct tldap_control *cctrls, int num_cctrls)
2286 {
2287         TALLOC_CTX *frame = talloc_stackframe();
2288         struct tevent_context *ev;
2289         struct tevent_req *req;
2290         TLDAPRC rc = TLDAP_NO_MEMORY;
2291
2292         ev = samba_tevent_context_init(frame);
2293         if (ev == NULL) {
2294                 goto fail;
2295         }
2296         req = tldap_add_send(frame, ev, ld, dn, attributes, num_attributes,
2297                              sctrls, num_sctrls, cctrls, num_cctrls);
2298         if (req == NULL) {
2299                 goto fail;
2300         }
2301         if (!tevent_req_poll(req, ev)) {
2302                 rc = TLDAP_OPERATIONS_ERROR;
2303                 goto fail;
2304         }
2305         rc = tldap_add_recv(req);
2306         tldap_save_msg(ld, req);
2307  fail:
2308         TALLOC_FREE(frame);
2309         return rc;
2310 }
2311
2312 static void tldap_modify_done(struct tevent_req *subreq);
2313
2314 struct tevent_req *tldap_modify_send(TALLOC_CTX *mem_ctx,
2315                                      struct tevent_context *ev,
2316                                      struct tldap_context *ld,
2317                                      const char *dn,
2318                                      struct tldap_mod *mods, int num_mods,
2319                                      struct tldap_control *sctrls,
2320                                      int num_sctrls,
2321                                      struct tldap_control *cctrls,
2322                                      int num_cctrls)
2323 {
2324         struct tevent_req *req, *subreq;
2325         struct tldap_req_state *state;
2326         int i, j;
2327
2328         req = tldap_req_create(mem_ctx, ld, &state);
2329         if (req == NULL) {
2330                 return NULL;
2331         }
2332
2333         if (!asn1_push_tag(state->out, TLDAP_REQ_MODIFY)) goto err;
2334         if (!asn1_write_OctetString(state->out, dn, strlen(dn))) goto err;
2335         if (!asn1_push_tag(state->out, ASN1_SEQUENCE(0))) goto err;
2336
2337         for (i=0; i<num_mods; i++) {
2338                 struct tldap_mod *mod = &mods[i];
2339                 if (!asn1_push_tag(state->out, ASN1_SEQUENCE(0))) goto err;
2340                 if (!asn1_write_enumerated(state->out, mod->mod_op)) goto err;
2341                 if (!asn1_push_tag(state->out, ASN1_SEQUENCE(0))) goto err;
2342                 if (!asn1_write_OctetString(state->out, mod->attribute,
2343                                        strlen(mod->attribute))) goto err;
2344                 if (!asn1_push_tag(state->out, ASN1_SET)) goto err;
2345                 for (j=0; j<mod->num_values; j++) {
2346                         if (!asn1_write_OctetString(state->out,
2347                                                mod->values[j].data,
2348                                                mod->values[j].length)) goto err;
2349                 }
2350                 if (!asn1_pop_tag(state->out)) goto err;
2351                 if (!asn1_pop_tag(state->out)) goto err;
2352                 if (!asn1_pop_tag(state->out)) goto err;
2353         }
2354
2355         if (!asn1_pop_tag(state->out)) goto err;
2356         if (!asn1_pop_tag(state->out)) goto err;
2357
2358         subreq = tldap_msg_send(state, ev, ld, state->id, state->out,
2359                                 sctrls, num_sctrls);
2360         if (tevent_req_nomem(subreq, req)) {
2361                 return tevent_req_post(req, ev);
2362         }
2363         tevent_req_set_callback(subreq, tldap_modify_done, req);
2364         return req;
2365
2366   err:
2367
2368         tevent_req_ldap_error(req, TLDAP_ENCODING_ERROR);
2369         return tevent_req_post(req, ev);
2370 }
2371
2372 static void tldap_modify_done(struct tevent_req *subreq)
2373 {
2374         tldap_simple_done(subreq, TLDAP_RES_MODIFY);
2375 }
2376
2377 TLDAPRC tldap_modify_recv(struct tevent_req *req)
2378 {
2379         return tldap_simple_recv(req);
2380 }
2381
2382 TLDAPRC tldap_modify(struct tldap_context *ld, const char *dn,
2383                      struct tldap_mod *mods, int num_mods,
2384                      struct tldap_control *sctrls, int num_sctrls,
2385                      struct tldap_control *cctrls, int num_cctrls)
2386  {
2387         TALLOC_CTX *frame = talloc_stackframe();
2388         struct tevent_context *ev;
2389         struct tevent_req *req;
2390         TLDAPRC rc = TLDAP_NO_MEMORY;
2391
2392         ev = samba_tevent_context_init(frame);
2393         if (ev == NULL) {
2394                 goto fail;
2395         }
2396         req = tldap_modify_send(frame, ev, ld, dn, mods, num_mods,
2397                                 sctrls, num_sctrls, cctrls, num_cctrls);
2398         if (req == NULL) {
2399                 goto fail;
2400         }
2401         if (!tevent_req_poll(req, ev)) {
2402                 rc = TLDAP_OPERATIONS_ERROR;
2403                 goto fail;
2404         }
2405         rc = tldap_modify_recv(req);
2406         tldap_save_msg(ld, req);
2407  fail:
2408         TALLOC_FREE(frame);
2409         return rc;
2410 }
2411
2412 static void tldap_delete_done(struct tevent_req *subreq);
2413
2414 struct tevent_req *tldap_delete_send(TALLOC_CTX *mem_ctx,
2415                                      struct tevent_context *ev,
2416                                      struct tldap_context *ld,
2417                                      const char *dn,
2418                                      struct tldap_control *sctrls,
2419                                      int num_sctrls,
2420                                      struct tldap_control *cctrls,
2421                                      int num_cctrls)
2422 {
2423         struct tevent_req *req, *subreq;
2424         struct tldap_req_state *state;
2425
2426         req = tldap_req_create(mem_ctx, ld, &state);
2427         if (req == NULL) {
2428                 return NULL;
2429         }
2430
2431         if (!asn1_push_tag(state->out, TLDAP_REQ_DELETE)) goto err;
2432         if (!asn1_write(state->out, dn, strlen(dn))) goto err;
2433         if (!asn1_pop_tag(state->out)) goto err;
2434
2435         subreq = tldap_msg_send(state, ev, ld, state->id, state->out,
2436                                 sctrls, num_sctrls);
2437         if (tevent_req_nomem(subreq, req)) {
2438                 return tevent_req_post(req, ev);
2439         }
2440         tevent_req_set_callback(subreq, tldap_delete_done, req);
2441         return req;
2442
2443   err:
2444
2445         tevent_req_ldap_error(req, TLDAP_ENCODING_ERROR);
2446         return tevent_req_post(req, ev);
2447 }
2448
2449 static void tldap_delete_done(struct tevent_req *subreq)
2450 {
2451         tldap_simple_done(subreq, TLDAP_RES_DELETE);
2452 }
2453
2454 TLDAPRC tldap_delete_recv(struct tevent_req *req)
2455 {
2456         return tldap_simple_recv(req);
2457 }
2458
2459 TLDAPRC tldap_delete(struct tldap_context *ld, const char *dn,
2460                      struct tldap_control *sctrls, int num_sctrls,
2461                      struct tldap_control *cctrls, int num_cctrls)
2462 {
2463         TALLOC_CTX *frame = talloc_stackframe();
2464         struct tevent_context *ev;
2465         struct tevent_req *req;
2466         TLDAPRC rc = TLDAP_NO_MEMORY;
2467
2468         ev = samba_tevent_context_init(frame);
2469         if (ev == NULL) {
2470                 goto fail;
2471         }
2472         req = tldap_delete_send(frame, ev, ld, dn, sctrls, num_sctrls,
2473                                 cctrls, num_cctrls);
2474         if (req == NULL) {
2475                 goto fail;
2476         }
2477         if (!tevent_req_poll(req, ev)) {
2478                 rc = TLDAP_OPERATIONS_ERROR;
2479                 goto fail;
2480         }
2481         rc = tldap_delete_recv(req);
2482         tldap_save_msg(ld, req);
2483  fail:
2484         TALLOC_FREE(frame);
2485         return rc;
2486 }
2487
2488 int tldap_msg_id(const struct tldap_message *msg)
2489 {
2490         return msg->id;
2491 }
2492
2493 int tldap_msg_type(const struct tldap_message *msg)
2494 {
2495         return msg->type;
2496 }
2497
2498 const char *tldap_msg_matcheddn(struct tldap_message *msg)
2499 {
2500         if (msg == NULL) {
2501                 return NULL;
2502         }
2503         return msg->res_matcheddn;
2504 }
2505
2506 const char *tldap_msg_diagnosticmessage(struct tldap_message *msg)
2507 {
2508         if (msg == NULL) {
2509                 return NULL;
2510         }
2511         return msg->res_diagnosticmessage;
2512 }
2513
2514 const char *tldap_msg_referral(struct tldap_message *msg)
2515 {
2516         if (msg == NULL) {
2517                 return NULL;
2518         }
2519         return msg->res_referral;
2520 }
2521
2522 void tldap_msg_sctrls(struct tldap_message *msg, int *num_sctrls,
2523                       struct tldap_control **sctrls)
2524 {
2525         if (msg == NULL) {
2526                 *sctrls = NULL;
2527                 *num_sctrls = 0;
2528                 return;
2529         }
2530         *sctrls = msg->res_sctrls;
2531         *num_sctrls = talloc_array_length(msg->res_sctrls);
2532 }
2533
2534 struct tldap_message *tldap_ctx_lastmsg(struct tldap_context *ld)
2535 {
2536         return ld->last_msg;
2537 }
2538
2539 static const struct { TLDAPRC rc; const char *string; } tldaprc_errmap[] =
2540 {
2541         { TLDAP_SUCCESS,
2542           "TLDAP_SUCCESS" },
2543         { TLDAP_OPERATIONS_ERROR,
2544           "TLDAP_OPERATIONS_ERROR" },
2545         { TLDAP_PROTOCOL_ERROR,
2546           "TLDAP_PROTOCOL_ERROR" },
2547         { TLDAP_TIMELIMIT_EXCEEDED,
2548           "TLDAP_TIMELIMIT_EXCEEDED" },
2549         { TLDAP_SIZELIMIT_EXCEEDED,
2550           "TLDAP_SIZELIMIT_EXCEEDED" },
2551         { TLDAP_COMPARE_FALSE,
2552           "TLDAP_COMPARE_FALSE" },
2553         { TLDAP_COMPARE_TRUE,
2554           "TLDAP_COMPARE_TRUE" },
2555         { TLDAP_STRONG_AUTH_NOT_SUPPORTED,
2556           "TLDAP_STRONG_AUTH_NOT_SUPPORTED" },
2557         { TLDAP_STRONG_AUTH_REQUIRED,
2558           "TLDAP_STRONG_AUTH_REQUIRED" },
2559         { TLDAP_REFERRAL,
2560           "TLDAP_REFERRAL" },
2561         { TLDAP_ADMINLIMIT_EXCEEDED,
2562           "TLDAP_ADMINLIMIT_EXCEEDED" },
2563         { TLDAP_UNAVAILABLE_CRITICAL_EXTENSION,
2564           "TLDAP_UNAVAILABLE_CRITICAL_EXTENSION" },
2565         { TLDAP_CONFIDENTIALITY_REQUIRED,
2566           "TLDAP_CONFIDENTIALITY_REQUIRED" },
2567         { TLDAP_SASL_BIND_IN_PROGRESS,
2568           "TLDAP_SASL_BIND_IN_PROGRESS" },
2569         { TLDAP_NO_SUCH_ATTRIBUTE,
2570           "TLDAP_NO_SUCH_ATTRIBUTE" },
2571         { TLDAP_UNDEFINED_TYPE,
2572           "TLDAP_UNDEFINED_TYPE" },
2573         { TLDAP_INAPPROPRIATE_MATCHING,
2574           "TLDAP_INAPPROPRIATE_MATCHING" },
2575         { TLDAP_CONSTRAINT_VIOLATION,
2576           "TLDAP_CONSTRAINT_VIOLATION" },
2577         { TLDAP_TYPE_OR_VALUE_EXISTS,
2578           "TLDAP_TYPE_OR_VALUE_EXISTS" },
2579         { TLDAP_INVALID_SYNTAX,
2580           "TLDAP_INVALID_SYNTAX" },
2581         { TLDAP_NO_SUCH_OBJECT,
2582           "TLDAP_NO_SUCH_OBJECT" },
2583         { TLDAP_ALIAS_PROBLEM,
2584           "TLDAP_ALIAS_PROBLEM" },
2585         { TLDAP_INVALID_DN_SYNTAX,
2586           "TLDAP_INVALID_DN_SYNTAX" },
2587         { TLDAP_IS_LEAF,
2588           "TLDAP_IS_LEAF" },
2589         { TLDAP_ALIAS_DEREF_PROBLEM,
2590           "TLDAP_ALIAS_DEREF_PROBLEM" },
2591         { TLDAP_INAPPROPRIATE_AUTH,
2592           "TLDAP_INAPPROPRIATE_AUTH" },
2593         { TLDAP_INVALID_CREDENTIALS,
2594           "TLDAP_INVALID_CREDENTIALS" },
2595         { TLDAP_INSUFFICIENT_ACCESS,
2596           "TLDAP_INSUFFICIENT_ACCESS" },
2597         { TLDAP_BUSY,
2598           "TLDAP_BUSY" },
2599         { TLDAP_UNAVAILABLE,
2600           "TLDAP_UNAVAILABLE" },
2601         { TLDAP_UNWILLING_TO_PERFORM,
2602           "TLDAP_UNWILLING_TO_PERFORM" },
2603         { TLDAP_LOOP_DETECT,
2604           "TLDAP_LOOP_DETECT" },
2605         { TLDAP_NAMING_VIOLATION,
2606           "TLDAP_NAMING_VIOLATION" },
2607         { TLDAP_OBJECT_CLASS_VIOLATION,
2608           "TLDAP_OBJECT_CLASS_VIOLATION" },
2609         { TLDAP_NOT_ALLOWED_ON_NONLEAF,
2610           "TLDAP_NOT_ALLOWED_ON_NONLEAF" },
2611         { TLDAP_NOT_ALLOWED_ON_RDN,
2612           "TLDAP_NOT_ALLOWED_ON_RDN" },
2613         { TLDAP_ALREADY_EXISTS,
2614           "TLDAP_ALREADY_EXISTS" },
2615         { TLDAP_NO_OBJECT_CLASS_MODS,
2616           "TLDAP_NO_OBJECT_CLASS_MODS" },
2617         { TLDAP_RESULTS_TOO_LARGE,
2618           "TLDAP_RESULTS_TOO_LARGE" },
2619         { TLDAP_AFFECTS_MULTIPLE_DSAS,
2620           "TLDAP_AFFECTS_MULTIPLE_DSAS" },
2621         { TLDAP_OTHER,
2622           "TLDAP_OTHER" },
2623         { TLDAP_SERVER_DOWN,
2624           "TLDAP_SERVER_DOWN" },
2625         { TLDAP_LOCAL_ERROR,
2626           "TLDAP_LOCAL_ERROR" },
2627         { TLDAP_ENCODING_ERROR,
2628           "TLDAP_ENCODING_ERROR" },
2629         { TLDAP_DECODING_ERROR,
2630           "TLDAP_DECODING_ERROR" },
2631         { TLDAP_TIMEOUT,
2632           "TLDAP_TIMEOUT" },
2633         { TLDAP_AUTH_UNKNOWN,
2634           "TLDAP_AUTH_UNKNOWN" },
2635         { TLDAP_FILTER_ERROR,
2636           "TLDAP_FILTER_ERROR" },
2637         { TLDAP_USER_CANCELLED,
2638           "TLDAP_USER_CANCELLED" },
2639         { TLDAP_PARAM_ERROR,
2640           "TLDAP_PARAM_ERROR" },
2641         { TLDAP_NO_MEMORY,
2642           "TLDAP_NO_MEMORY" },
2643         { TLDAP_CONNECT_ERROR,
2644           "TLDAP_CONNECT_ERROR" },
2645         { TLDAP_NOT_SUPPORTED,
2646           "TLDAP_NOT_SUPPORTED" },
2647         { TLDAP_CONTROL_NOT_FOUND,
2648           "TLDAP_CONTROL_NOT_FOUND" },
2649         { TLDAP_NO_RESULTS_RETURNED,
2650           "TLDAP_NO_RESULTS_RETURNED" },
2651         { TLDAP_MORE_RESULTS_TO_RETURN,
2652           "TLDAP_MORE_RESULTS_TO_RETURN" },
2653         { TLDAP_CLIENT_LOOP,
2654           "TLDAP_CLIENT_LOOP" },
2655         { TLDAP_REFERRAL_LIMIT_EXCEEDED,
2656           "TLDAP_REFERRAL_LIMIT_EXCEEDED" },
2657 };
2658
2659 const char *tldap_rc2string(TLDAPRC rc)
2660 {
2661         size_t i;
2662
2663         for (i=0; i<ARRAY_SIZE(tldaprc_errmap); i++) {
2664                 if (TLDAP_RC_EQUAL(rc, tldaprc_errmap[i].rc)) {
2665                         return tldaprc_errmap[i].string;
2666                 }
2667         }
2668
2669         return "Unknown LDAP Error";
2670 }