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 "includes.h"
  21
  22 bool tevent_req_is_ldap_error(struct tevent_req *req, int *perr)
  23 {
  24         enum tevent_req_state state;
  25         uint64_t err;
  26
  27         if (!tevent_req_is_error(req, &state, &err)) {
  28                 return false;
  29         }
  30         switch (state) {
  31         case TEVENT_REQ_TIMED_OUT:
  32                 *perr = TLDAP_TIMEOUT;
  33                 break;
  34         case TEVENT_REQ_NO_MEMORY:
  35                 *perr = TLDAP_NO_MEMORY;
  36                 break;
  37         case TEVENT_REQ_USER_ERROR:
  38                 *perr = err;
  39                 break;
  40         default:
  41                 *perr = TLDAP_OPERATIONS_ERROR;
  42                 break;
  43         }
  44         return true;
  45 }
  46
  47 struct tldap_ctx_attribute {
  48         char *name;
  49         void *ptr;
  50 };
  51
  52 struct tldap_context {
  53         int ld_version;
  54         int ld_deref;
  55         int ld_sizelimit;
  56         int ld_timelimit;
  57         struct tstream_context *conn;
  58         bool server_down;
  59         int msgid;
  60         struct tevent_queue *outgoing;
  61         struct tevent_req **pending;
  62
  63         /* For the sync wrappers we need something like get_last_error... */
  64         struct tldap_message *last_msg;
  65
  66         /* debug */
  67         void (*log_fn)(void *context, enum tldap_debug_level level,
  68                        const char *fmt, va_list ap);
  69         void *log_private;
  70
  71         struct tldap_ctx_attribute *ctx_attrs;
  72 };
  73
  74 struct tldap_message {
  75         struct asn1_data *data;
  76         uint8_t *inbuf;
  77         int type;
  78         int id;
  79
  80         /* RESULT_ENTRY */
  81         char *dn;
  82         struct tldap_attribute *attribs;
  83
  84         /* Error data sent by the server */
  85         int lderr;
  86         char *res_matcheddn;
  87         char *res_diagnosticmessage;
  88         char *res_referral;
  89         struct tldap_control *res_sctrls;
  90
  91         /* Controls sent by the server */
  92         struct tldap_control *ctrls;
  93 };
  94
  95 void tldap_set_debug(struct tldap_context *ld,
  96                      void (*log_fn)(void *log_private,
  97                                     enum tldap_debug_level level,
  98                                     const char *fmt,
  99                                     va_list ap) PRINTF_ATTRIBUTE(3,0),
 100                      void *log_private)
 101 {
 102         ld->log_fn = log_fn;
 103         ld->log_private = log_private;
 104 }
 105
 106 static void tldap_debug(struct tldap_context *ld,
 107                          enum tldap_debug_level level,
 108                          const char *fmt, ...)
 109 {
 110         va_list ap;
 111         if (!ld) {
 112                 return;
 113         }
 114         if (ld->log_fn == NULL) {
 115                 return;
 116         }
 117         va_start(ap, fmt);
 118         ld->log_fn(ld->log_private, level, fmt, ap);
 119         va_end(ap);
 120 }
 121
 122 static int tldap_next_msgid(struct tldap_context *ld)
 123 {
 124         int result;
 125
 126         result = ld->msgid++;
 127         if (ld->msgid == 2147483647) {
 128                 ld->msgid = 1;
 129         }
 130         return result;
 131 }
 132
 133 struct tldap_context *tldap_context_create(TALLOC_CTX *mem_ctx, int fd)
 134 {
 135         struct tldap_context *ctx;
 136         int ret;
 137
 138         ctx = talloc_zero(mem_ctx, struct tldap_context);
 139         if (ctx == NULL) {
 140                 return NULL;
 141         }
 142         ret = tstream_bsd_existing_socket(ctx, fd, &ctx->conn);
 143         if (ret == -1) {
 144                 TALLOC_FREE(ctx);
 145                 return NULL;
 146         }
 147         ctx->msgid = 1;
 148         ctx->ld_version = 3;
 149         ctx->outgoing = tevent_queue_create(ctx, "tldap_outgoing");
 150         if (ctx->outgoing == NULL) {
 151                 TALLOC_FREE(ctx);
 152                 return NULL;
 153         }
 154         return ctx;
 155 }
 156
 157 bool tldap_connection_ok(struct tldap_context *ld)
 158 {
 159         if (ld == NULL) {
 160                 return false;
 161         }
 162         return !ld->server_down;
 163 }
 164
 165 static struct tldap_ctx_attribute *tldap_context_findattr(
 166         struct tldap_context *ld, const char *name)
 167 {
 168         int i, num_attrs;
 169
 170         num_attrs = talloc_array_length(ld->ctx_attrs);
 171
 172         for (i=0; i<num_attrs; i++) {
 173                 if (strcmp(ld->ctx_attrs[i].name, name) == 0) {
 174                         return &ld->ctx_attrs[i];
 175                 }
 176         }
 177         return NULL;
 178 }
 179
 180 bool tldap_context_setattr(struct tldap_context *ld,
 181                            const char *name, const void *_pptr)
 182 {
 183         struct tldap_ctx_attribute *tmp, *attr;
 184         char *tmpname;
 185         int num_attrs;
 186         void **pptr = (void **)_pptr;
 187
 188         attr = tldap_context_findattr(ld, name);
 189         if (attr != NULL) {
 190                 /*
 191                  * We don't actually delete attrs, we don't expect tons of
 192                  * attributes being shuffled around.
 193                  */
 194                 TALLOC_FREE(attr->ptr);
 195                 if (*pptr != NULL) {
 196                         attr->ptr = talloc_move(ld->ctx_attrs, pptr);
 197                         *pptr = NULL;
 198                 }
 199                 return true;
 200         }
 201
 202         tmpname = talloc_strdup(ld, name);
 203         if (tmpname == NULL) {
 204                 return false;
 205         }
 206
 207         num_attrs = talloc_array_length(ld->ctx_attrs);
 208
 209         tmp = talloc_realloc(ld, ld->ctx_attrs, struct tldap_ctx_attribute,
 210                              num_attrs+1);
 211         if (tmp == NULL) {
 212                 TALLOC_FREE(tmpname);
 213                 return false;
 214         }
 215         tmp[num_attrs].name = talloc_move(tmp, &tmpname);
 216         if (*pptr != NULL) {
 217                 tmp[num_attrs].ptr = talloc_move(tmp, pptr);
 218         } else {
 219                 tmp[num_attrs].ptr = NULL;
 220         }
 221         *pptr = NULL;
 222         ld->ctx_attrs = tmp;
 223         return true;
 224 }
 225
 226 void *tldap_context_getattr(struct tldap_context *ld, const char *name)
 227 {
 228         struct tldap_ctx_attribute *attr = tldap_context_findattr(ld, name);
 229
 230         if (attr == NULL) {
 231                 return NULL;
 232         }
 233         return attr->ptr;
 234 }
 235
 236 struct read_ldap_state {
 237         uint8_t *buf;
 238         bool done;
 239 };
 240
 241 static ssize_t read_ldap_more(uint8_t *buf, size_t buflen, void *private_data);
 242 static void read_ldap_done(struct tevent_req *subreq);
 243
 244 static struct tevent_req *read_ldap_send(TALLOC_CTX *mem_ctx,
 245                                          struct tevent_context *ev,
 246                                          struct tstream_context *conn)
 247 {
 248         struct tevent_req *req, *subreq;
 249         struct read_ldap_state *state;
 250
 251         req = tevent_req_create(mem_ctx, &state, struct read_ldap_state);
 252         if (req == NULL) {
 253                 return NULL;
 254         }
 255         state->done = false;
 256
 257         subreq = tstream_read_packet_send(state, ev, conn, 2, read_ldap_more,
 258                                           state);
 259         if (tevent_req_nomem(subreq, req)) {
 260                 return tevent_req_post(req, ev);
 261         }
 262         tevent_req_set_callback(subreq, read_ldap_done, req);
 263         return req;
 264 }
 265
 266 static ssize_t read_ldap_more(uint8_t *buf, size_t buflen, void *private_data)
 267 {
 268         struct read_ldap_state *state = talloc_get_type_abort(
 269                 private_data, struct read_ldap_state);
 270         size_t len;
 271         int i, lensize;
 272
 273         if (state->done) {
 274                 /* We've been here, we're done */
 275                 return 0;
 276         }
 277
 278         /*
 279          * From ldap.h: LDAP_TAG_MESSAGE is 0x30
 280          */
 281         if (buf[0] != 0x30) {
 282                 return -1;
 283         }
 284
 285         len = buf[1];
 286         if ((len & 0x80) == 0) {
 287                 state->done = true;
 288                 return len;
 289         }
 290
 291         lensize = (len & 0x7f);
 292         len = 0;
 293
 294         if (buflen == 2) {
 295                 /* Please get us the full length */
 296                 return lensize;
 297         }
 298         if (buflen > 2 + lensize) {
 299                 state->done = true;
 300                 return 0;
 301         }
 302         if (buflen != 2 + lensize) {
 303                 return -1;
 304         }
 305
 306         for (i=0; i<lensize; i++) {
 307                 len = (len << 8) | buf[2+i];
 308         }
 309         return len;
 310 }
 311
 312 static void read_ldap_done(struct tevent_req *subreq)
 313 {
 314         struct tevent_req *req = tevent_req_callback_data(
 315                 subreq, struct tevent_req);
 316         struct read_ldap_state *state = tevent_req_data(
 317                 req, struct read_ldap_state);
 318         ssize_t nread;
 319         int err;
 320
 321         nread = tstream_read_packet_recv(subreq, state, &state->buf, &err);
 322         TALLOC_FREE(subreq);
 323         if (nread == -1) {
 324                 tevent_req_error(req, err);
 325                 return;
 326         }
 327         tevent_req_done(req);
 328 }
 329
 330 static ssize_t read_ldap_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
 331                               uint8_t **pbuf, int *perrno)
 332 {
 333         struct read_ldap_state *state = tevent_req_data(
 334                 req, struct read_ldap_state);
 335
 336         if (tevent_req_is_unix_error(req, perrno)) {
 337                 return -1;
 338         }
 339         *pbuf = talloc_move(mem_ctx, &state->buf);
 340         return talloc_get_size(*pbuf);
 341 }
 342
 343 struct tldap_msg_state {
 344         struct tldap_context *ld;
 345         struct tevent_context *ev;
 346         int id;
 347         struct iovec iov;
 348
 349         struct asn1_data *data;
 350         uint8_t *inbuf;
 351 };
 352
 353 static void tldap_push_controls(struct asn1_data *data,
 354                                 struct tldap_control *sctrls,
 355                                 int num_sctrls)
 356 {
 357         int i;
 358
 359         if ((sctrls == NULL) || (num_sctrls == 0)) {
 360                 return;
 361         }
 362
 363         asn1_push_tag(data, ASN1_CONTEXT(0));
 364
 365         for (i=0; i<num_sctrls; i++) {
 366                 struct tldap_control *c = &sctrls[i];
 367                 asn1_push_tag(data, ASN1_SEQUENCE(0));
 368                 asn1_write_OctetString(data, c->oid, strlen(c->oid));
 369                 if (c->critical) {
 370                         asn1_write_BOOLEAN(data, true);
 371                 }
 372                 if (c->value.data != NULL) {
 373                         asn1_write_OctetString(data, c->value.data,
 374                                                c->value.length);
 375                 }
 376                 asn1_pop_tag(data); /* ASN1_SEQUENCE(0) */
 377         }
 378
 379         asn1_pop_tag(data); /* ASN1_CONTEXT(0) */
 380 }
 381
 382 static void tldap_msg_sent(struct tevent_req *subreq);
 383 static void tldap_msg_received(struct tevent_req *subreq);
 384
 385 static struct tevent_req *tldap_msg_send(TALLOC_CTX *mem_ctx,
 386                                          struct tevent_context *ev,
 387                                          struct tldap_context *ld,
 388                                          int id, struct asn1_data *data,
 389                                          struct tldap_control *sctrls,
 390                                          int num_sctrls)
 391 {
 392         struct tevent_req *req, *subreq;
 393         struct tldap_msg_state *state;
 394         DATA_BLOB blob;
 395
 396         tldap_debug(ld, TLDAP_DEBUG_TRACE, "tldap_msg_send: sending msg %d\n",
 397                     id);
 398
 399         req = tevent_req_create(mem_ctx, &state, struct tldap_msg_state);
 400         if (req == NULL) {
 401                 return NULL;
 402         }
 403         state->ld = ld;
 404         state->ev = ev;
 405         state->id = id;
 406
 407         if (state->ld->server_down) {
 408                 tevent_req_error(req, TLDAP_SERVER_DOWN);
 409                 return tevent_req_post(req, ev);
 410         }
 411
 412         tldap_push_controls(data, sctrls, num_sctrls);
 413
 414         asn1_pop_tag(data);
 415
 416         if (!asn1_blob(data, &blob)) {
 417                 tevent_req_error(req, TLDAP_ENCODING_ERROR);
 418                 return tevent_req_post(req, ev);
 419         }
 420
 421         state->iov.iov_base = blob.data;
 422         state->iov.iov_len = blob.length;
 423
 424         subreq = tstream_writev_queue_send(state, ev, ld->conn, ld->outgoing,
 425                                            &state->iov, 1);
 426         if (tevent_req_nomem(subreq, req)) {
 427                 return tevent_req_post(req, ev);
 428         }
 429         tevent_req_set_callback(subreq, tldap_msg_sent, req);
 430         return req;
 431 }
 432
 433 static void tldap_msg_unset_pending(struct tevent_req *req)
 434 {
 435         struct tldap_msg_state *state = tevent_req_data(
 436                 req, struct tldap_msg_state);
 437         struct tldap_context *ld = state->ld;
 438         int num_pending = talloc_array_length(ld->pending);
 439         int i;
 440
 441         if (num_pending == 1) {
 442                 TALLOC_FREE(ld->pending);
 443                 return;
 444         }
 445
 446         for (i=0; i<num_pending; i++) {
 447                 if (req == ld->pending[i]) {
 448                         break;
 449                 }
 450         }
 451         if (i == num_pending) {
 452                 /*
 453                  * Something's seriously broken. Just returning here is the
 454                  * right thing nevertheless, the point of this routine is to
 455                  * remove ourselves from cli->pending.
 456                  */
 457                 return;
 458         }
 459
 460         /*
 461          * Remove ourselves from the cli->pending array
 462          */
 463         if (num_pending > 1) {
 464                 ld->pending[i] = ld->pending[num_pending-1];
 465         }
 466
 467         /*
 468          * No NULL check here, we're shrinking by sizeof(void *), and
 469          * talloc_realloc just adjusts the size for this.
 470          */
 471         ld->pending = talloc_realloc(NULL, ld->pending, struct tevent_req *,
 472                                      num_pending - 1);
 473         return;
 474 }
 475
 476 static int tldap_msg_destructor(struct tevent_req *req)
 477 {
 478         tldap_msg_unset_pending(req);
 479         return 0;
 480 }
 481
 482 static bool tldap_msg_set_pending(struct tevent_req *req)
 483 {
 484         struct tldap_msg_state *state = tevent_req_data(
 485                 req, struct tldap_msg_state);
 486         struct tldap_context *ld;
 487         struct tevent_req **pending;
 488         int num_pending;
 489         struct tevent_req *subreq;
 490
 491         ld = state->ld;
 492         num_pending = talloc_array_length(ld->pending);
 493
 494         pending = talloc_realloc(ld, ld->pending, struct tevent_req *,
 495                                  num_pending+1);
 496         if (pending == NULL) {
 497                 return false;
 498         }
 499         pending[num_pending] = req;
 500         ld->pending = pending;
 501         talloc_set_destructor(req, tldap_msg_destructor);
 502
 503         if (num_pending > 0) {
 504                 return true;
 505         }
 506
 507         /*
 508          * We're the first ones, add the read_ldap request that waits for the
 509          * answer from the server
 510          */
 511         subreq = read_ldap_send(ld->pending, state->ev, ld->conn);
 512         if (subreq == NULL) {
 513                 tldap_msg_unset_pending(req);
 514                 return false;
 515         }
 516         tevent_req_set_callback(subreq, tldap_msg_received, ld);
 517         return true;
 518 }
 519
 520 static void tldap_msg_sent(struct tevent_req *subreq)
 521 {
 522         struct tevent_req *req = tevent_req_callback_data(
 523                 subreq, struct tevent_req);
 524         struct tldap_msg_state *state = tevent_req_data(
 525                 req, struct tldap_msg_state);
 526         ssize_t nwritten;
 527         int err;
 528
 529         nwritten = tstream_writev_queue_recv(subreq, &err);
 530         TALLOC_FREE(subreq);
 531         if (nwritten == -1) {
 532                 state->ld->server_down = true;
 533                 tevent_req_error(req, TLDAP_SERVER_DOWN);
 534                 return;
 535         }
 536
 537         if (!tldap_msg_set_pending(req)) {
 538                 tevent_req_nomem(NULL, req);
 539                 return;
 540         }
 541 }
 542
 543 static int tldap_msg_msgid(struct tevent_req *req)
 544 {
 545         struct tldap_msg_state *state = tevent_req_data(
 546                 req, struct tldap_msg_state);
 547
 548         return state->id;
 549 }
 550
 551 static void tldap_msg_received(struct tevent_req *subreq)
 552 {
 553         struct tldap_context *ld = tevent_req_callback_data(
 554                 subreq, struct tldap_context);
 555         struct tevent_req *req;
 556         struct tldap_msg_state *state;
 557         struct tevent_context *ev;
 558         struct asn1_data *data;
 559         uint8_t *inbuf;
 560         ssize_t received;
 561         size_t num_pending;
 562         int i, err, status;
 563         int id;
 564         uint8_t type;
 565         bool ok;
 566
 567         received = read_ldap_recv(subreq, talloc_tos(), &inbuf, &err);
 568         TALLOC_FREE(subreq);
 569         if (received == -1) {
 570                 status = TLDAP_SERVER_DOWN;
 571                 goto fail;
 572         }
 573
 574         data = asn1_init(talloc_tos());
 575         if (data == NULL) {
 576                 status = TLDAP_NO_MEMORY;
 577                 goto fail;
 578         }
 579         asn1_load_nocopy(data, inbuf, received);
 580
 581         ok = true;
 582         ok &= asn1_start_tag(data, ASN1_SEQUENCE(0));
 583         ok &= asn1_read_Integer(data, &id);
 584         ok &= asn1_peek_uint8(data, &type);
 585
 586         if (!ok) {
 587                 status = TLDAP_PROTOCOL_ERROR;
 588                 goto fail;
 589         }
 590
 591         tldap_debug(ld, TLDAP_DEBUG_TRACE, "tldap_msg_received: got msg %d "
 592                     "type %d\n", id, (int)type);
 593
 594         num_pending = talloc_array_length(ld->pending);
 595
 596         for (i=0; i<num_pending; i++) {
 597                 if (id == tldap_msg_msgid(ld->pending[i])) {
 598                         break;
 599                 }
 600         }
 601         if (i == num_pending) {
 602                 /* Dump unexpected reply */
 603                 tldap_debug(ld, TLDAP_DEBUG_WARNING, "tldap_msg_received: "
 604                             "No request pending for msg %d\n", id);
 605                 TALLOC_FREE(data);
 606                 TALLOC_FREE(inbuf);
 607                 goto done;
 608         }
 609
 610         req = ld->pending[i];
 611         state = tevent_req_data(req, struct tldap_msg_state);
 612
 613         state->inbuf = talloc_move(state, &inbuf);
 614         state->data = talloc_move(state, &data);
 615
 616         ev = state->ev;
 617
 618         talloc_set_destructor(req, NULL);
 619         tldap_msg_unset_pending(req);
 620         num_pending = talloc_array_length(ld->pending);
 621
 622         tevent_req_done(req);
 623
 624  done:
 625         if (num_pending == 0) {
 626                 return;
 627         }
 628         if (talloc_array_length(ld->pending) > num_pending) {
 629                 /*
 630                  * The callback functions called from tevent_req_done() above
 631                  * have put something on the pending queue. We don't have to
 632                  * trigger the read_ldap_send(), tldap_msg_set_pending() has
 633                  * done it for us already.
 634                  */
 635                 return;
 636         }
 637
 638         state = tevent_req_data(ld->pending[0], struct tldap_msg_state);
 639         subreq = read_ldap_send(ld->pending, state->ev, ld->conn);
 640         if (subreq == NULL) {
 641                 status = TLDAP_NO_MEMORY;
 642                 goto fail;
 643         }
 644         tevent_req_set_callback(subreq, tldap_msg_received, ld);
 645         return;
 646
 647  fail:
 648         while (talloc_array_length(ld->pending) > 0) {
 649                 req = ld->pending[0];
 650                 talloc_set_destructor(req, NULL);
 651                 tldap_msg_destructor(req);
 652                 tevent_req_error(req, status);
 653         }
 654 }
 655
 656 static int tldap_msg_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
 657                           struct tldap_message **pmsg)
 658 {
 659         struct tldap_msg_state *state = tevent_req_data(
 660                 req, struct tldap_msg_state);
 661         struct tldap_message *msg;
 662         int err;
 663         uint8_t msgtype;
 664
 665         if (tevent_req_is_ldap_error(req, &err)) {
 666                 return err;
 667         }
 668
 669         if (!asn1_peek_uint8(state->data, &msgtype)) {
 670                 return TLDAP_PROTOCOL_ERROR;
 671         }
 672
 673         if (pmsg == NULL) {
 674                 return TLDAP_SUCCESS;
 675         }
 676
 677         msg = talloc_zero(mem_ctx, struct tldap_message);
 678         if (msg == NULL) {
 679                 return TLDAP_NO_MEMORY;
 680         }
 681         msg->id = state->id;
 682
 683         msg->inbuf = talloc_move(msg, &state->inbuf);
 684         msg->data = talloc_move(msg, &state->data);
 685         msg->type = msgtype;
 686
 687         *pmsg = msg;
 688         return TLDAP_SUCCESS;
 689 }
 690
 691 struct tldap_req_state {
 692         int id;
 693         struct asn1_data *out;
 694         struct tldap_message *result;
 695 };
 696
 697 static struct tevent_req *tldap_req_create(TALLOC_CTX *mem_ctx,
 698                                            struct tldap_context *ld,
 699                                            struct tldap_req_state **pstate)
 700 {
 701         struct tevent_req *req;
 702         struct tldap_req_state *state;
 703
 704         req = tevent_req_create(mem_ctx, &state, struct tldap_req_state);
 705         if (req == NULL) {
 706                 return NULL;
 707         }
 708         ZERO_STRUCTP(state);
 709         state->out = asn1_init(state);
 710         if (state->out == NULL) {
 711                 TALLOC_FREE(req);
 712                 return NULL;
 713         }
 714         state->result = NULL;
 715         state->id = tldap_next_msgid(ld);
 716
 717         asn1_push_tag(state->out, ASN1_SEQUENCE(0));
 718         asn1_write_Integer(state->out, state->id);
 719
 720         *pstate = state;
 721         return req;
 722 }
 723
 724 static void tldap_save_msg(struct tldap_context *ld, struct tevent_req *req)
 725 {
 726         struct tldap_req_state *state = tevent_req_data(
 727                 req, struct tldap_req_state);
 728
 729         TALLOC_FREE(ld->last_msg);
 730         ld->last_msg = talloc_move(ld, &state->result);
 731 }
 732
 733 static char *blob2string_talloc(TALLOC_CTX *mem_ctx, DATA_BLOB blob)
 734 {
 735         char *result = talloc_array(mem_ctx, char, blob.length+1);
 736         memcpy(result, blob.data, blob.length);
 737         result[blob.length] = '\0';
 738         return result;
 739 }
 740
 741 static bool asn1_read_OctetString_talloc(TALLOC_CTX *mem_ctx,
 742                                          struct asn1_data *data,
 743                                          char **result)
 744 {
 745         DATA_BLOB string;
 746         if (!asn1_read_OctetString(data, mem_ctx, &string))
 747                 return false;
 748         *result = blob2string_talloc(mem_ctx, string);
 749         data_blob_free(&string);
 750         return true;
 751 }
 752
 753 static bool tldap_decode_controls(struct tldap_req_state *state);
 754
 755 static bool tldap_decode_response(struct tldap_req_state *state)
 756 {
 757         struct asn1_data *data = state->result->data;
 758         struct tldap_message *msg = state->result;
 759         bool ok = true;
 760
 761         ok &= asn1_read_enumerated(data, &msg->lderr);
 762         ok &= asn1_read_OctetString_talloc(msg, data, &msg->res_matcheddn);
 763         ok &= asn1_read_OctetString_talloc(msg, data,
 764                                            &msg->res_diagnosticmessage);
 765         if (asn1_peek_tag(data, ASN1_CONTEXT(3))) {
 766                 ok &= asn1_start_tag(data, ASN1_CONTEXT(3));
 767                 ok &= asn1_read_OctetString_talloc(msg, data,
 768                                                    &msg->res_referral);
 769                 ok &= asn1_end_tag(data);
 770         } else {
 771                 msg->res_referral = NULL;
 772         }
 773
 774         return ok;
 775 }
 776
 777 static void tldap_sasl_bind_done(struct tevent_req *subreq);
 778
 779 struct tevent_req *tldap_sasl_bind_send(TALLOC_CTX *mem_ctx,
 780                                         struct tevent_context *ev,
 781                                         struct tldap_context *ld,
 782                                         const char *dn,
 783                                         const char *mechanism,
 784                                         DATA_BLOB *creds,
 785                                         struct tldap_control *sctrls,
 786                                         int num_sctrls,
 787                                         struct tldap_control *cctrls,
 788                                         int num_cctrls)
 789 {
 790         struct tevent_req *req, *subreq;
 791         struct tldap_req_state *state;
 792
 793         req = tldap_req_create(mem_ctx, ld, &state);
 794         if (req == NULL) {
 795                 return NULL;
 796         }
 797
 798         if (dn == NULL) {
 799                 dn = "";
 800         }
 801
 802         asn1_push_tag(state->out, TLDAP_REQ_BIND);
 803         asn1_write_Integer(state->out, ld->ld_version);
 804         asn1_write_OctetString(state->out, dn, (dn != NULL) ? strlen(dn) : 0);
 805
 806         if (mechanism == NULL) {
 807                 asn1_push_tag(state->out, ASN1_CONTEXT_SIMPLE(0));
 808                 asn1_write(state->out, creds->data, creds->length);
 809                 asn1_pop_tag(state->out);
 810         } else {
 811                 asn1_push_tag(state->out, ASN1_CONTEXT(3));
 812                 asn1_write_OctetString(state->out, mechanism,
 813                                        strlen(mechanism));
 814                 if ((creds != NULL) && (creds->data != NULL)) {
 815                         asn1_write_OctetString(state->out, creds->data,
 816                                                creds->length);
 817                 }
 818                 asn1_pop_tag(state->out);
 819         }
 820
 821         if (!asn1_pop_tag(state->out)) {
 822                 tevent_req_error(req, TLDAP_ENCODING_ERROR);
 823                 return tevent_req_post(req, ev);
 824         }
 825
 826         subreq = tldap_msg_send(state, ev, ld, state->id, state->out,
 827                                 sctrls, num_sctrls);
 828         if (tevent_req_nomem(subreq, req)) {
 829                 return tevent_req_post(req, ev);
 830         }
 831         tevent_req_set_callback(subreq, tldap_sasl_bind_done, req);
 832         return req;
 833 }
 834
 835 static void tldap_sasl_bind_done(struct tevent_req *subreq)
 836 {
 837         struct tevent_req *req = tevent_req_callback_data(
 838                 subreq, struct tevent_req);
 839         struct tldap_req_state *state = tevent_req_data(
 840                 req, struct tldap_req_state);
 841         int err;
 842
 843         err = tldap_msg_recv(subreq, state, &state->result);
 844         TALLOC_FREE(subreq);
 845         if (err != TLDAP_SUCCESS) {
 846                 tevent_req_error(req, err);
 847                 return;
 848         }
 849         if (state->result->type != TLDAP_RES_BIND) {
 850                 tevent_req_error(req, TLDAP_PROTOCOL_ERROR);
 851                 return;
 852         }
 853         if (!asn1_start_tag(state->result->data, state->result->type) ||
 854             !tldap_decode_response(state) ||
 855             !asn1_end_tag(state->result->data)) {
 856                 tevent_req_error(req, TLDAP_DECODING_ERROR);
 857                 return;
 858         }
 859         /*
 860          * TODO: pull the reply blob
 861          */
 862         if (state->result->lderr != TLDAP_SUCCESS) {
 863                 tevent_req_error(req, state->result->lderr);
 864                 return;
 865         }
 866         tevent_req_done(req);
 867 }
 868
 869 int tldap_sasl_bind_recv(struct tevent_req *req)
 870 {
 871         int err;
 872
 873         if (tevent_req_is_ldap_error(req, &err)) {
 874                 return err;
 875         }
 876         return TLDAP_SUCCESS;
 877 }
 878
 879 int tldap_sasl_bind(struct tldap_context *ld,
 880                     const char *dn,
 881                     const char *mechanism,
 882                     DATA_BLOB *creds,
 883                     struct tldap_control *sctrls,
 884                     int num_sctrls,
 885                     struct tldap_control *cctrls,
 886                     int num_cctrls)
 887 {
 888         TALLOC_CTX *frame = talloc_stackframe();
 889         struct tevent_context *ev;
 890         struct tevent_req *req;
 891         int result;
 892
 893         ev = event_context_init(frame);
 894         if (ev == NULL) {
 895                 result = TLDAP_NO_MEMORY;
 896                 goto fail;
 897         }
 898
 899         req = tldap_sasl_bind_send(frame, ev, ld, dn, mechanism, creds,
 900                                    sctrls, num_sctrls, cctrls, num_cctrls);
 901         if (req == NULL) {
 902                 result = TLDAP_NO_MEMORY;
 903                 goto fail;
 904         }
 905
 906         if (!tevent_req_poll(req, ev)) {
 907                 result = TLDAP_OPERATIONS_ERROR;
 908                 goto fail;
 909         }
 910
 911         result = tldap_sasl_bind_recv(req);
 912         tldap_save_msg(ld, req);
 913  fail:
 914         TALLOC_FREE(frame);
 915         return result;
 916 }
 917
 918 struct tevent_req *tldap_simple_bind_send(TALLOC_CTX *mem_ctx,
 919                                           struct tevent_context *ev,
 920                                           struct tldap_context *ld,
 921                                           const char *dn,
 922                                           const char *passwd)
 923 {
 924         DATA_BLOB cred;
 925
 926         if (passwd != NULL) {
 927                 cred.data = (uint8_t *)passwd;
 928                 cred.length = strlen(passwd);
 929         } else {
 930                 cred.data = (uint8_t *)"";
 931                 cred.length = 0;
 932         }
 933         return tldap_sasl_bind_send(mem_ctx, ev, ld, dn, NULL, &cred, NULL, 0,
 934                                     NULL, 0);
 935 }
 936
 937 int tldap_simple_bind_recv(struct tevent_req *req)
 938 {
 939         return tldap_sasl_bind_recv(req);
 940 }
 941
 942 int tldap_simple_bind(struct tldap_context *ld, const char *dn,
 943                       const char *passwd)
 944 {
 945         DATA_BLOB cred;
 946
 947         if (passwd != NULL) {
 948                 cred.data = (uint8_t *)passwd;
 949                 cred.length = strlen(passwd);
 950         } else {
 951                 cred.data = (uint8_t *)"";
 952                 cred.length = 0;
 953         }
 954         return tldap_sasl_bind(ld, dn, NULL, &cred, NULL, 0, NULL, 0);
 955 }
 956
 957 /*****************************************************************************/
 958
 959 /*
 960  * This piece has a dependency on ldb, the ldb_parse_tree() function is used.
 961  * In case we want to separate out tldap, we need to copy or rewrite it.
 962  */
 963
 964 #include "lib/ldb/include/ldb.h"
 965 #include "lib/ldb/include/ldb_errors.h"
 966
 967 static bool ldap_push_filter(struct asn1_data *data,
 968                              struct ldb_parse_tree *tree)
 969 {
 970         int i;
 971
 972         switch (tree->operation) {
 973         case LDB_OP_AND:
 974         case LDB_OP_OR:
 975                 asn1_push_tag(data,
 976                               ASN1_CONTEXT(tree->operation==LDB_OP_AND?0:1));
 977                 for (i=0; i<tree->u.list.num_elements; i++) {
 978                         if (!ldap_push_filter(data,
 979                                               tree->u.list.elements[i])) {
 980                                 return false;
 981                         }
 982                 }
 983                 asn1_pop_tag(data);
 984                 break;
 985
 986         case LDB_OP_NOT:
 987                 asn1_push_tag(data, ASN1_CONTEXT(2));
 988                 if (!ldap_push_filter(data, tree->u.isnot.child)) {
 989                         return false;
 990                 }
 991                 asn1_pop_tag(data);
 992                 break;
 993
 994         case LDB_OP_EQUALITY:
 995                 /* equality test */
 996                 asn1_push_tag(data, ASN1_CONTEXT(3));
 997                 asn1_write_OctetString(data, tree->u.equality.attr,
 998                                       strlen(tree->u.equality.attr));
 999                 asn1_write_OctetString(data, tree->u.equality.value.data,
1000                                       tree->u.equality.value.length);
1001                 asn1_pop_tag(data);
1002                 break;
1003
1004         case LDB_OP_SUBSTRING:
1005                 /*
1006                   SubstringFilter ::= SEQUENCE {
1007                           type            AttributeDescription,
1008                           -- at least one must be present
1009                           substrings      SEQUENCE OF CHOICE {
1010                                   initial [0] LDAPString,
1011                                   any     [1] LDAPString,
1012                                   final   [2] LDAPString } }
1013                 */
1014                 asn1_push_tag(data, ASN1_CONTEXT(4));
1015                 asn1_write_OctetString(data, tree->u.substring.attr,
1016                                        strlen(tree->u.substring.attr));
1017                 asn1_push_tag(data, ASN1_SEQUENCE(0));
1018                 i = 0;
1019                 if (!tree->u.substring.start_with_wildcard) {
1020                         asn1_push_tag(data, ASN1_CONTEXT_SIMPLE(0));
1021                         asn1_write_DATA_BLOB_LDAPString(
1022                                 data, tree->u.substring.chunks[i]);
1023                         asn1_pop_tag(data);
1024                         i++;
1025                 }
1026                 while (tree->u.substring.chunks[i]) {
1027                         int ctx;
1028
1029                         if ((!tree->u.substring.chunks[i + 1]) &&
1030                             (tree->u.substring.end_with_wildcard == 0)) {
1031                                 ctx = 2;
1032                         } else {
1033                                 ctx = 1;
1034                         }
1035                         asn1_push_tag(data, ASN1_CONTEXT_SIMPLE(ctx));
1036                         asn1_write_DATA_BLOB_LDAPString(
1037                                 data, tree->u.substring.chunks[i]);
1038                         asn1_pop_tag(data);
1039                         i++;
1040                 }
1041                 asn1_pop_tag(data);
1042                 asn1_pop_tag(data);
1043                 break;
1044
1045         case LDB_OP_GREATER:
1046                 /* greaterOrEqual test */
1047                 asn1_push_tag(data, ASN1_CONTEXT(5));
1048                 asn1_write_OctetString(data, tree->u.comparison.attr,
1049                                       strlen(tree->u.comparison.attr));
1050                 asn1_write_OctetString(data, tree->u.comparison.value.data,
1051                                       tree->u.comparison.value.length);
1052                 asn1_pop_tag(data);
1053                 break;
1054
1055         case LDB_OP_LESS:
1056                 /* lessOrEqual test */
1057                 asn1_push_tag(data, ASN1_CONTEXT(6));
1058                 asn1_write_OctetString(data, tree->u.comparison.attr,
1059                                       strlen(tree->u.comparison.attr));
1060                 asn1_write_OctetString(data, tree->u.comparison.value.data,
1061                                       tree->u.comparison.value.length);
1062                 asn1_pop_tag(data);
1063                 break;
1064
1065         case LDB_OP_PRESENT:
1066                 /* present test */
1067                 asn1_push_tag(data, ASN1_CONTEXT_SIMPLE(7));
1068                 asn1_write_LDAPString(data, tree->u.present.attr);
1069                 asn1_pop_tag(data);
1070                 return !data->has_error;
1071
1072         case LDB_OP_APPROX:
1073                 /* approx test */
1074                 asn1_push_tag(data, ASN1_CONTEXT(8));
1075                 asn1_write_OctetString(data, tree->u.comparison.attr,
1076                                       strlen(tree->u.comparison.attr));
1077                 asn1_write_OctetString(data, tree->u.comparison.value.data,
1078                                       tree->u.comparison.value.length);
1079                 asn1_pop_tag(data);
1080                 break;
1081
1082         case LDB_OP_EXTENDED:
1083                 /*
1084                   MatchingRuleAssertion ::= SEQUENCE {
1085                   matchingRule    [1] MatchingRuleID OPTIONAL,
1086                   type            [2] AttributeDescription OPTIONAL,
1087                   matchValue      [3] AssertionValue,
1088                   dnAttributes    [4] BOOLEAN DEFAULT FALSE
1089                   }
1090                 */
1091                 asn1_push_tag(data, ASN1_CONTEXT(9));
1092                 if (tree->u.extended.rule_id) {
1093                         asn1_push_tag(data, ASN1_CONTEXT_SIMPLE(1));
1094                         asn1_write_LDAPString(data, tree->u.extended.rule_id);
1095                         asn1_pop_tag(data);
1096                 }
1097                 if (tree->u.extended.attr) {
1098                         asn1_push_tag(data, ASN1_CONTEXT_SIMPLE(2));
1099                         asn1_write_LDAPString(data, tree->u.extended.attr);
1100                         asn1_pop_tag(data);
1101                 }
1102                 asn1_push_tag(data, ASN1_CONTEXT_SIMPLE(3));
1103                 asn1_write_DATA_BLOB_LDAPString(data, &tree->u.extended.value);
1104                 asn1_pop_tag(data);
1105                 asn1_push_tag(data, ASN1_CONTEXT_SIMPLE(4));
1106                 asn1_write_uint8(data, tree->u.extended.dnAttributes);
1107                 asn1_pop_tag(data);
1108                 asn1_pop_tag(data);
1109                 break;
1110
1111         default:
1112                 return false;
1113         }
1114         return !data->has_error;
1115 }
1116
1117 static bool tldap_push_filter(struct asn1_data *data, const char *filter)
1118 {
1119         struct ldb_parse_tree *tree;
1120         bool ret;
1121
1122         tree = ldb_parse_tree(talloc_tos(), filter);
1123         if (tree == NULL) {
1124                 return false;
1125         }
1126         ret = ldap_push_filter(data, tree);
1127         TALLOC_FREE(tree);
1128         return ret;
1129 }
1130
1131 /*****************************************************************************/
1132
1133 static void tldap_search_done(struct tevent_req *subreq);
1134
1135 struct tevent_req *tldap_search_send(TALLOC_CTX *mem_ctx,
1136                                      struct tevent_context *ev,
1137                                      struct tldap_context *ld,
1138                                      const char *base, int scope,
1139                                      const char *filter,
1140                                      const char **attrs,
1141                                      int num_attrs,
1142                                      int attrsonly,
1143                                      struct tldap_control *sctrls,
1144                                      int num_sctrls,
1145                                      struct tldap_control *cctrls,
1146                                      int num_cctrls,
1147                                      int timelimit,
1148                                      int sizelimit,
1149                                      int deref)
1150 {
1151         struct tevent_req *req, *subreq;
1152         struct tldap_req_state *state;
1153         int i;
1154
1155         req = tldap_req_create(mem_ctx, ld, &state);
1156         if (req == NULL) {
1157                 return NULL;
1158         }
1159
1160         asn1_push_tag(state->out, TLDAP_REQ_SEARCH);
1161         asn1_write_OctetString(state->out, base, strlen(base));
1162         asn1_write_enumerated(state->out, scope);
1163         asn1_write_enumerated(state->out, deref);
1164         asn1_write_Integer(state->out, sizelimit);
1165         asn1_write_Integer(state->out, timelimit);
1166         asn1_write_BOOLEAN(state->out, attrsonly);
1167
1168         if (!tldap_push_filter(state->out, filter)) {
1169                 goto encoding_error;
1170         }
1171
1172         asn1_push_tag(state->out, ASN1_SEQUENCE(0));
1173         for (i=0; i<num_attrs; i++) {
1174                 asn1_write_OctetString(state->out, attrs[i], strlen(attrs[i]));
1175         }
1176         asn1_pop_tag(state->out);
1177         asn1_pop_tag(state->out);
1178
1179         subreq = tldap_msg_send(state, ev, ld, state->id, state->out,
1180                                 sctrls, num_sctrls);
1181         if (tevent_req_nomem(subreq, req)) {
1182                 return tevent_req_post(req, ev);
1183         }
1184         tevent_req_set_callback(subreq, tldap_search_done, req);
1185         return req;
1186
1187  encoding_error:
1188         tevent_req_error(req, TLDAP_ENCODING_ERROR);
1189         return tevent_req_post(req, ev);
1190 }
1191
1192 static void tldap_search_done(struct tevent_req *subreq)
1193 {
1194         struct tevent_req *req = tevent_req_callback_data(
1195                 subreq, struct tevent_req);
1196         struct tldap_req_state *state = tevent_req_data(
1197                 req, struct tldap_req_state);
1198         int err;
1199
1200         err = tldap_msg_recv(subreq, state, &state->result);
1201         if (err != TLDAP_SUCCESS) {
1202                 tevent_req_error(req, err);
1203                 return;
1204         }
1205         switch (state->result->type) {
1206         case TLDAP_RES_SEARCH_ENTRY:
1207         case TLDAP_RES_SEARCH_REFERENCE:
1208                 tevent_req_notify_callback(req);
1209                 if (!tldap_msg_set_pending(subreq)) {
1210                         tevent_req_nomem(NULL, req);
1211                         return;
1212                 }
1213                 break;
1214         case TLDAP_RES_SEARCH_RESULT:
1215                 TALLOC_FREE(subreq);
1216                 if (!asn1_start_tag(state->result->data,
1217                                     state->result->type) ||
1218                     !tldap_decode_response(state) ||
1219                     !asn1_end_tag(state->result->data) ||
1220                     !tldap_decode_controls(state)) {
1221                         tevent_req_error(req, TLDAP_DECODING_ERROR);
1222                         return;
1223                 }
1224                 tevent_req_done(req);
1225                 break;
1226         default:
1227                 tevent_req_error(req, TLDAP_PROTOCOL_ERROR);
1228                 return;
1229         }
1230 }
1231
1232 int tldap_search_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
1233                       struct tldap_message **pmsg)
1234 {
1235         struct tldap_req_state *state = tevent_req_data(
1236                 req, struct tldap_req_state);
1237         int err;
1238
1239         if (!tevent_req_is_in_progress(req)
1240             && tevent_req_is_ldap_error(req, &err)) {
1241                 return err;
1242         }
1243
1244         if (tevent_req_is_in_progress(req)) {
1245                 switch (state->result->type) {
1246                 case TLDAP_RES_SEARCH_ENTRY:
1247                 case TLDAP_RES_SEARCH_REFERENCE:
1248                         break;
1249                 default:
1250                         return TLDAP_OPERATIONS_ERROR;
1251                 }
1252         }
1253
1254         *pmsg = talloc_move(mem_ctx, &state->result);
1255         return TLDAP_SUCCESS;
1256 }
1257
1258 struct tldap_sync_search_state {
1259         TALLOC_CTX *mem_ctx;
1260         struct tldap_message **entries;
1261         struct tldap_message **refs;
1262         int rc;
1263 };
1264
1265 static void tldap_search_cb(struct tevent_req *req)
1266 {
1267         struct tldap_sync_search_state *state =
1268                 (struct tldap_sync_search_state *)
1269                 tevent_req_callback_data_void(req);
1270         struct tldap_message *msg, **tmp;
1271         int rc, num_entries, num_refs;
1272
1273         rc = tldap_search_recv(req, talloc_tos(), &msg);
1274         if (rc != TLDAP_SUCCESS) {
1275                 state->rc = rc;
1276                 return;
1277         }
1278
1279         switch (tldap_msg_type(msg)) {
1280         case TLDAP_RES_SEARCH_ENTRY:
1281                 num_entries = talloc_array_length(state->entries);
1282                 tmp = talloc_realloc(state->mem_ctx, state->entries,
1283                                      struct tldap_message *, num_entries + 1);
1284                 if (tmp == NULL) {
1285                         state->rc = TLDAP_NO_MEMORY;
1286                         return;
1287                 }
1288                 state->entries = tmp;
1289                 state->entries[num_entries] = talloc_move(state->entries,
1290                                                           &msg);
1291                 break;
1292         case TLDAP_RES_SEARCH_REFERENCE:
1293                 num_refs = talloc_array_length(state->refs);
1294                 tmp = talloc_realloc(state->mem_ctx, state->refs,
1295                                      struct tldap_message *, num_refs + 1);
1296                 if (tmp == NULL) {
1297                         state->rc = TLDAP_NO_MEMORY;
1298                         return;
1299                 }
1300                 state->refs = tmp;
1301                 state->refs[num_refs] = talloc_move(state->refs, &msg);
1302                 break;
1303         case TLDAP_RES_SEARCH_RESULT:
1304                 state->rc = TLDAP_SUCCESS;
1305                 break;
1306         default:
1307                 state->rc = TLDAP_PROTOCOL_ERROR;
1308                 break;
1309         }
1310 }
1311
1312 int tldap_search(struct tldap_context *ld,
1313                  const char *base, int scope, const char *filter,
1314                  const char **attrs, int num_attrs, int attrsonly,
1315                  struct tldap_control *sctrls, int num_sctrls,
1316                  struct tldap_control *cctrls, int num_cctrls,
1317                  int timelimit, int sizelimit, int deref,
1318                  TALLOC_CTX *mem_ctx, struct tldap_message ***entries,
1319                  struct tldap_message ***refs)
1320 {
1321         TALLOC_CTX *frame = talloc_stackframe();
1322         struct tevent_context *ev;
1323         struct tevent_req *req;
1324         struct tldap_sync_search_state state;
1325
1326         ZERO_STRUCT(state);
1327         state.mem_ctx = mem_ctx;
1328         state.rc = TLDAP_SUCCESS;
1329
1330         ev = event_context_init(frame);
1331         if (ev == NULL) {
1332                 state.rc = TLDAP_NO_MEMORY;
1333                 goto fail;
1334         }
1335
1336         req = tldap_search_send(frame, ev, ld, base, scope, filter,
1337                                 attrs, num_attrs, attrsonly,
1338                                 sctrls, num_sctrls, cctrls, num_cctrls,
1339                                 timelimit, sizelimit, deref);
1340         if (req == NULL) {
1341                 state.rc = TLDAP_NO_MEMORY;
1342                 goto fail;
1343         }
1344
1345         tevent_req_set_callback(req, tldap_search_cb, &state);
1346
1347         while (tevent_req_is_in_progress(req)
1348                && (state.rc == TLDAP_SUCCESS)) {
1349                 if (tevent_loop_once(ev) == -1) {
1350                         return TLDAP_OPERATIONS_ERROR;
1351                 }
1352         }
1353
1354         if (state.rc != TLDAP_SUCCESS) {
1355                 return state.rc;
1356         }
1357
1358         if (entries != NULL) {
1359                 *entries = state.entries;
1360         } else {
1361                 TALLOC_FREE(state.entries);
1362         }
1363         if (refs != NULL) {
1364                 *refs = state.refs;
1365         } else {
1366                 TALLOC_FREE(state.refs);
1367         }
1368         tldap_save_msg(ld, req);
1369 fail:
1370         TALLOC_FREE(frame);
1371         return state.rc;
1372 }
1373
1374 static bool tldap_parse_search_entry(struct tldap_message *msg)
1375 {
1376         int num_attribs = 0;
1377
1378         asn1_start_tag(msg->data, msg->type);
1379
1380         /* dn */
1381
1382         asn1_read_OctetString_talloc(msg, msg->data, &msg->dn);
1383         if (msg->dn == NULL) {
1384                 return false;
1385         }
1386
1387         /*
1388          * Attributes: We overallocate msg->attribs by one, so that while
1389          * looping over the attributes we can directly parse into the last
1390          * array element. Same for the values in the inner loop.
1391          */
1392
1393         msg->attribs = talloc_array(msg, struct tldap_attribute, 1);
1394         if (msg->attribs == NULL) {
1395                 return false;
1396         }
1397
1398         asn1_start_tag(msg->data, ASN1_SEQUENCE(0));
1399         while (asn1_peek_tag(msg->data, ASN1_SEQUENCE(0))) {
1400                 struct tldap_attribute *attrib;
1401                 int num_values = 0;
1402
1403                 attrib = &msg->attribs[num_attribs];
1404                 attrib->values = talloc_array(msg->attribs, DATA_BLOB, 1);
1405                 if (attrib->values == NULL) {
1406                         return false;
1407                 }
1408                 asn1_start_tag(msg->data, ASN1_SEQUENCE(0));
1409                 asn1_read_OctetString_talloc(msg->attribs, msg->data,
1410                                              &attrib->name);
1411                 asn1_start_tag(msg->data, ASN1_SET);
1412
1413                 while (asn1_peek_tag(msg->data, ASN1_OCTET_STRING)) {
1414                         asn1_read_OctetString(msg->data, msg,
1415                                               &attrib->values[num_values]);
1416
1417                         attrib->values = talloc_realloc(
1418                                 msg->attribs, attrib->values, DATA_BLOB,
1419                                 num_values + 2);
1420                         if (attrib->values == NULL) {
1421                                 return false;
1422                         }
1423                         num_values += 1;
1424                 }
1425                 attrib->values = talloc_realloc(msg->attribs, attrib->values,
1426                                                 DATA_BLOB, num_values);
1427                 attrib->num_values = num_values;
1428
1429                 asn1_end_tag(msg->data); /* ASN1_SET */
1430                 asn1_end_tag(msg->data); /* ASN1_SEQUENCE(0) */
1431                 msg->attribs = talloc_realloc(
1432                         msg, msg->attribs, struct tldap_attribute,
1433                         num_attribs + 2);
1434                 if (msg->attribs == NULL) {
1435                         return false;
1436                 }
1437                 num_attribs += 1;
1438         }
1439         msg->attribs = talloc_realloc(
1440                 msg, msg->attribs, struct tldap_attribute, num_attribs);
1441         asn1_end_tag(msg->data);
1442         if (msg->data->has_error) {
1443                 return false;
1444         }
1445         return true;
1446 }
1447
1448 bool tldap_entry_dn(struct tldap_message *msg, char **dn)
1449 {
1450         if ((msg->dn == NULL) && (!tldap_parse_search_entry(msg))) {
1451                 return false;
1452         }
1453         *dn = msg->dn;
1454         return true;
1455 }
1456
1457 bool tldap_entry_attributes(struct tldap_message *msg, int *num_attributes,
1458                             struct tldap_attribute **attributes)
1459 {
1460         if ((msg->dn == NULL) && (!tldap_parse_search_entry(msg))) {
1461                 return false;
1462         }
1463         *attributes = msg->attribs;
1464         *num_attributes = talloc_array_length(msg->attribs);
1465         return true;
1466 }
1467
1468 static bool tldap_decode_controls(struct tldap_req_state *state)
1469 {
1470         struct tldap_message *msg = state->result;
1471         struct asn1_data *data = msg->data;
1472         struct tldap_control *sctrls = NULL;
1473         int num_controls = 0;
1474
1475         msg->res_sctrls = NULL;
1476
1477         if (!asn1_peek_tag(data, ASN1_CONTEXT(0))) {
1478                 return true;
1479         }
1480
1481         asn1_start_tag(data, ASN1_CONTEXT(0));
1482
1483         while (asn1_peek_tag(data, ASN1_SEQUENCE(0))) {
1484                 struct tldap_control *c;
1485                 char *oid = NULL;
1486
1487                 sctrls = talloc_realloc(msg, sctrls, struct tldap_control,
1488                                         num_controls + 1);
1489                 if (sctrls == NULL) {
1490                         return false;
1491                 }
1492                 c = &sctrls[num_controls];
1493
1494                 asn1_start_tag(data, ASN1_SEQUENCE(0));
1495                 asn1_read_OctetString_talloc(msg, data, &oid);
1496                 if ((data->has_error) || (oid == NULL)) {
1497                         return false;
1498                 }
1499                 c->oid = oid;
1500                 if (asn1_peek_tag(data, ASN1_BOOLEAN)) {
1501                         asn1_read_BOOLEAN(data, &c->critical);
1502                 } else {
1503                         c->critical = false;
1504                 }
1505                 c->value = data_blob_null;
1506                 if (asn1_peek_tag(data, ASN1_OCTET_STRING) &&
1507                     !asn1_read_OctetString(data, msg, &c->value)) {
1508                         return false;
1509                 }
1510                 asn1_end_tag(data); /* ASN1_SEQUENCE(0) */
1511
1512                 num_controls += 1;
1513         }
1514
1515         asn1_end_tag(data);     /* ASN1_CONTEXT(0) */
1516
1517         if (data->has_error) {
1518                 TALLOC_FREE(sctrls);
1519                 return false;
1520         }
1521         msg->res_sctrls = sctrls;
1522         return true;
1523 }
1524
1525 static void tldap_simple_done(struct tevent_req *subreq, int type)
1526 {
1527         struct tevent_req *req = tevent_req_callback_data(
1528                 subreq, struct tevent_req);
1529         struct tldap_req_state *state = tevent_req_data(
1530                 req, struct tldap_req_state);
1531         int err;
1532
1533         err = tldap_msg_recv(subreq, state, &state->result);
1534         TALLOC_FREE(subreq);
1535         if (err != TLDAP_SUCCESS) {
1536                 tevent_req_error(req, err);
1537                 return;
1538         }
1539         if (state->result->type != type) {
1540                 tevent_req_error(req, TLDAP_PROTOCOL_ERROR);
1541                 return;
1542         }
1543         if (!asn1_start_tag(state->result->data, state->result->type) ||
1544             !tldap_decode_response(state) ||
1545             !asn1_end_tag(state->result->data) ||
1546             !tldap_decode_controls(state)) {
1547                 tevent_req_error(req, TLDAP_DECODING_ERROR);
1548                 return;
1549         }
1550         if (state->result->lderr != TLDAP_SUCCESS) {
1551                 tevent_req_error(req, state->result->lderr);
1552                 return;
1553         }
1554         tevent_req_done(req);
1555 }
1556
1557 static int tldap_simple_recv(struct tevent_req *req)
1558 {
1559         int err;
1560         if (tevent_req_is_ldap_error(req, &err)) {
1561                 return err;
1562         }
1563         return TLDAP_SUCCESS;
1564 }
1565
1566 static void tldap_add_done(struct tevent_req *subreq);
1567
1568 struct tevent_req *tldap_add_send(TALLOC_CTX *mem_ctx,
1569                                   struct tevent_context *ev,
1570                                   struct tldap_context *ld,
1571                                   const char *dn,
1572                                   struct tldap_mod *attributes,
1573                                   int num_attributes,
1574                                   struct tldap_control *sctrls,
1575                                   int num_sctrls,
1576                                   struct tldap_control *cctrls,
1577                                   int num_cctrls)
1578 {
1579         struct tevent_req *req, *subreq;
1580         struct tldap_req_state *state;
1581         int i, j;
1582
1583         req = tldap_req_create(mem_ctx, ld, &state);
1584         if (req == NULL) {
1585                 return NULL;
1586         }
1587
1588         asn1_push_tag(state->out, TLDAP_REQ_ADD);
1589         asn1_write_OctetString(state->out, dn, strlen(dn));
1590         asn1_push_tag(state->out, ASN1_SEQUENCE(0));
1591
1592         for (i=0; i<num_attributes; i++) {
1593                 struct tldap_mod *attrib = &attributes[i];
1594                 asn1_push_tag(state->out, ASN1_SEQUENCE(0));
1595                 asn1_write_OctetString(state->out, attrib->attribute,
1596                                        strlen(attrib->attribute));
1597                 asn1_push_tag(state->out, ASN1_SET);
1598                 for (j=0; j<attrib->num_values; j++) {
1599                         asn1_write_OctetString(state->out,
1600                                                attrib->values[j].data,
1601                                                attrib->values[j].length);
1602                 }
1603                 asn1_pop_tag(state->out);
1604                 asn1_pop_tag(state->out);
1605         }
1606
1607         asn1_pop_tag(state->out);
1608         asn1_pop_tag(state->out);
1609
1610         subreq = tldap_msg_send(state, ev, ld, state->id, state->out,
1611                                 sctrls, num_sctrls);
1612         if (tevent_req_nomem(subreq, req)) {
1613                 return tevent_req_post(req, ev);
1614         }
1615         tevent_req_set_callback(subreq, tldap_add_done, req);
1616         return req;
1617 }
1618
1619 static void tldap_add_done(struct tevent_req *subreq)
1620 {
1621         return tldap_simple_done(subreq, TLDAP_RES_ADD);
1622 }
1623
1624 int tldap_add_recv(struct tevent_req *req)
1625 {
1626         return tldap_simple_recv(req);
1627 }
1628
1629 int tldap_add(struct tldap_context *ld, const char *dn,
1630               int num_attributes, struct tldap_mod *attributes,
1631               struct tldap_control *sctrls, int num_sctrls,
1632               struct tldap_control *cctrls, int num_cctrls)
1633 {
1634         TALLOC_CTX *frame = talloc_stackframe();
1635         struct tevent_context *ev;
1636         struct tevent_req *req;
1637         int result;
1638
1639         ev = event_context_init(frame);
1640         if (ev == NULL) {
1641                 result = TLDAP_NO_MEMORY;
1642                 goto fail;
1643         }
1644
1645         req = tldap_add_send(frame, ev, ld, dn, attributes, num_attributes,
1646                              sctrls, num_sctrls, cctrls, num_cctrls);
1647         if (req == NULL) {
1648                 result = TLDAP_NO_MEMORY;
1649                 goto fail;
1650         }
1651
1652         if (!tevent_req_poll(req, ev)) {
1653                 result = TLDAP_OPERATIONS_ERROR;
1654                 goto fail;
1655         }
1656
1657         result = tldap_add_recv(req);
1658         tldap_save_msg(ld, req);
1659  fail:
1660         TALLOC_FREE(frame);
1661         return result;
1662 }
1663
1664 static void tldap_modify_done(struct tevent_req *subreq);
1665
1666 struct tevent_req *tldap_modify_send(TALLOC_CTX *mem_ctx,
1667                                      struct tevent_context *ev,
1668                                      struct tldap_context *ld,
1669                                      const char *dn,
1670                                      int num_mods, struct tldap_mod *mods,
1671                                      struct tldap_control *sctrls,
1672                                      int num_sctrls,
1673                                      struct tldap_control *cctrls,
1674                                      int num_cctrls)
1675 {
1676         struct tevent_req *req, *subreq;
1677         struct tldap_req_state *state;
1678         int i, j;
1679
1680         req = tldap_req_create(mem_ctx, ld, &state);
1681         if (req == NULL) {
1682                 return NULL;
1683         }
1684
1685         asn1_push_tag(state->out, TLDAP_REQ_MODIFY);
1686         asn1_write_OctetString(state->out, dn, strlen(dn));
1687         asn1_push_tag(state->out, ASN1_SEQUENCE(0));
1688
1689         for (i=0; i<num_mods; i++) {
1690                 struct tldap_mod *mod = &mods[i];
1691                 asn1_push_tag(state->out, ASN1_SEQUENCE(0));
1692                 asn1_write_enumerated(state->out, mod->mod_op),
1693                 asn1_push_tag(state->out, ASN1_SEQUENCE(0));
1694                 asn1_write_OctetString(state->out, mod->attribute,
1695                                        strlen(mod->attribute));
1696                 asn1_push_tag(state->out, ASN1_SET);
1697                 for (j=0; j<mod->num_values; j++) {
1698                         asn1_write_OctetString(state->out,
1699                                                mod->values[j].data,
1700                                                mod->values[j].length);
1701                 }
1702                 asn1_pop_tag(state->out);
1703                 asn1_pop_tag(state->out);
1704                 asn1_pop_tag(state->out);
1705         }
1706
1707         asn1_pop_tag(state->out);
1708         asn1_pop_tag(state->out);
1709
1710         subreq = tldap_msg_send(state, ev, ld, state->id, state->out,
1711                                 sctrls, num_sctrls);
1712         if (tevent_req_nomem(subreq, req)) {
1713                 return tevent_req_post(req, ev);
1714         }
1715         tevent_req_set_callback(subreq, tldap_modify_done, req);
1716         return req;
1717 }
1718
1719 static void tldap_modify_done(struct tevent_req *subreq)
1720 {
1721         return tldap_simple_done(subreq, TLDAP_RES_MODIFY);
1722 }
1723
1724 int tldap_modify_recv(struct tevent_req *req)
1725 {
1726         return tldap_simple_recv(req);
1727 }
1728
1729 int tldap_modify(struct tldap_context *ld, const char *dn,
1730                  int num_mods, struct tldap_mod *mods,
1731                  struct tldap_control *sctrls, int num_sctrls,
1732                  struct tldap_control *cctrls, int num_cctrls)
1733  {
1734         TALLOC_CTX *frame = talloc_stackframe();
1735         struct tevent_context *ev;
1736         struct tevent_req *req;
1737         int result;
1738
1739         ev = event_context_init(frame);
1740         if (ev == NULL) {
1741                 result = TLDAP_NO_MEMORY;
1742                 goto fail;
1743         }
1744
1745         req = tldap_modify_send(frame, ev, ld, dn, num_mods, mods,
1746                                 sctrls, num_sctrls, cctrls, num_cctrls);
1747         if (req == NULL) {
1748                 result = TLDAP_NO_MEMORY;
1749                 goto fail;
1750         }
1751
1752         if (!tevent_req_poll(req, ev)) {
1753                 result = TLDAP_OPERATIONS_ERROR;
1754                 goto fail;
1755         }
1756
1757         result = tldap_modify_recv(req);
1758         tldap_save_msg(ld, req);
1759  fail:
1760         TALLOC_FREE(frame);
1761         return result;
1762 }
1763
1764 static void tldap_delete_done(struct tevent_req *subreq);
1765
1766 struct tevent_req *tldap_delete_send(TALLOC_CTX *mem_ctx,
1767                                      struct tevent_context *ev,
1768                                      struct tldap_context *ld,
1769                                      const char *dn,
1770                                      struct tldap_control *sctrls,
1771                                      int num_sctrls,
1772                                      struct tldap_control *cctrls,
1773                                      int num_cctrls)
1774 {
1775         struct tevent_req *req, *subreq;
1776         struct tldap_req_state *state;
1777
1778         req = tldap_req_create(mem_ctx, ld, &state);
1779         if (req == NULL) {
1780                 return NULL;
1781         }
1782
1783         asn1_push_tag(state->out, TLDAP_REQ_DELETE);
1784         asn1_write(state->out, dn, strlen(dn));
1785         asn1_pop_tag(state->out);
1786
1787         subreq = tldap_msg_send(state, ev, ld, state->id, state->out,
1788                                 sctrls, num_sctrls);
1789         if (tevent_req_nomem(subreq, req)) {
1790                 return tevent_req_post(req, ev);
1791         }
1792         tevent_req_set_callback(subreq, tldap_delete_done, req);
1793         return req;
1794 }
1795
1796 static void tldap_delete_done(struct tevent_req *subreq)
1797 {
1798         return tldap_simple_done(subreq, TLDAP_RES_DELETE);
1799 }
1800
1801 int tldap_delete_recv(struct tevent_req *req)
1802 {
1803         return tldap_simple_recv(req);
1804 }
1805
1806 int tldap_delete(struct tldap_context *ld, const char *dn,
1807                  struct tldap_control *sctrls, int num_sctrls,
1808                  struct tldap_control *cctrls, int num_cctrls)
1809 {
1810         TALLOC_CTX *frame = talloc_stackframe();
1811         struct tevent_context *ev;
1812         struct tevent_req *req;
1813         int result;
1814
1815         ev = event_context_init(frame);
1816         if (ev == NULL) {
1817                 result = TLDAP_NO_MEMORY;
1818                 goto fail;
1819         }
1820
1821         req = tldap_delete_send(frame, ev, ld, dn, sctrls, num_sctrls,
1822                                 cctrls, num_cctrls);
1823         if (req == NULL) {
1824                 result = TLDAP_NO_MEMORY;
1825                 goto fail;
1826         }
1827
1828         if (!tevent_req_poll(req, ev)) {
1829                 result = TLDAP_OPERATIONS_ERROR;
1830                 goto fail;
1831         }
1832
1833         result = tldap_delete_recv(req);
1834         tldap_save_msg(ld, req);
1835  fail:
1836         TALLOC_FREE(frame);
1837         return result;
1838 }
1839
1840 int tldap_msg_id(const struct tldap_message *msg)
1841 {
1842         return msg->id;
1843 }
1844
1845 int tldap_msg_type(const struct tldap_message *msg)
1846 {
1847         return msg->type;
1848 }
1849
1850 const char *tldap_msg_matcheddn(struct tldap_message *msg)
1851 {
1852         if (msg == NULL) {
1853                 return NULL;
1854         }
1855         return msg->res_matcheddn;
1856 }
1857
1858 const char *tldap_msg_diagnosticmessage(struct tldap_message *msg)
1859 {
1860         if (msg == NULL) {
1861                 return NULL;
1862         }
1863         return msg->res_diagnosticmessage;
1864 }
1865
1866 const char *tldap_msg_referral(struct tldap_message *msg)
1867 {
1868         if (msg == NULL) {
1869                 return NULL;
1870         }
1871         return msg->res_referral;
1872 }
1873
1874 void tldap_msg_sctrls(struct tldap_message *msg, int *num_sctrls,
1875                       struct tldap_control **sctrls)
1876 {
1877         if (msg == NULL) {
1878                 *sctrls = NULL;
1879                 *num_sctrls = 0;
1880         }
1881         *sctrls = msg->res_sctrls;
1882         *num_sctrls = talloc_array_length(msg->res_sctrls);
1883 }
1884
1885 struct tldap_message *tldap_ctx_lastmsg(struct tldap_context *ld)
1886 {
1887         return ld->last_msg;
1888 }
1889
1890 const char *tldap_err2string(int rc)
1891 {
1892         const char *res = NULL;
1893
1894         /*
1895          * This would normally be a table, but the error codes are not fully
1896          * sequential. Let the compiler figure out the optimum implementation
1897          * :-)
1898          */
1899
1900         switch (rc) {
1901         case TLDAP_SUCCESS:
1902                 res = "TLDAP_SUCCESS";
1903                 break;
1904         case TLDAP_OPERATIONS_ERROR:
1905                 res = "TLDAP_OPERATIONS_ERROR";
1906                 break;
1907         case TLDAP_PROTOCOL_ERROR:
1908                 res = "TLDAP_PROTOCOL_ERROR";
1909                 break;
1910         case TLDAP_TIMELIMIT_EXCEEDED:
1911                 res = "TLDAP_TIMELIMIT_EXCEEDED";
1912                 break;
1913         case TLDAP_SIZELIMIT_EXCEEDED:
1914                 res = "TLDAP_SIZELIMIT_EXCEEDED";
1915                 break;
1916         case TLDAP_COMPARE_FALSE:
1917                 res = "TLDAP_COMPARE_FALSE";
1918                 break;
1919         case TLDAP_COMPARE_TRUE:
1920                 res = "TLDAP_COMPARE_TRUE";
1921                 break;
1922         case TLDAP_STRONG_AUTH_NOT_SUPPORTED:
1923                 res = "TLDAP_STRONG_AUTH_NOT_SUPPORTED";
1924                 break;
1925         case TLDAP_STRONG_AUTH_REQUIRED:
1926                 res = "TLDAP_STRONG_AUTH_REQUIRED";
1927                 break;
1928         case TLDAP_REFERRAL:
1929                 res = "TLDAP_REFERRAL";
1930                 break;
1931         case TLDAP_ADMINLIMIT_EXCEEDED:
1932                 res = "TLDAP_ADMINLIMIT_EXCEEDED";
1933                 break;
1934         case TLDAP_UNAVAILABLE_CRITICAL_EXTENSION:
1935                 res = "TLDAP_UNAVAILABLE_CRITICAL_EXTENSION";
1936                 break;
1937         case TLDAP_CONFIDENTIALITY_REQUIRED:
1938                 res = "TLDAP_CONFIDENTIALITY_REQUIRED";
1939                 break;
1940         case TLDAP_SASL_BIND_IN_PROGRESS:
1941                 res = "TLDAP_SASL_BIND_IN_PROGRESS";
1942                 break;
1943         case TLDAP_NO_SUCH_ATTRIBUTE:
1944                 res = "TLDAP_NO_SUCH_ATTRIBUTE";
1945                 break;
1946         case TLDAP_UNDEFINED_TYPE:
1947                 res = "TLDAP_UNDEFINED_TYPE";
1948                 break;
1949         case TLDAP_INAPPROPRIATE_MATCHING:
1950                 res = "TLDAP_INAPPROPRIATE_MATCHING";
1951                 break;
1952         case TLDAP_CONSTRAINT_VIOLATION:
1953                 res = "TLDAP_CONSTRAINT_VIOLATION";
1954                 break;
1955         case TLDAP_TYPE_OR_VALUE_EXISTS:
1956                 res = "TLDAP_TYPE_OR_VALUE_EXISTS";
1957                 break;
1958         case TLDAP_INVALID_SYNTAX:
1959                 res = "TLDAP_INVALID_SYNTAX";
1960                 break;
1961         case TLDAP_NO_SUCH_OBJECT:
1962                 res = "TLDAP_NO_SUCH_OBJECT";
1963                 break;
1964         case TLDAP_ALIAS_PROBLEM:
1965                 res = "TLDAP_ALIAS_PROBLEM";
1966                 break;
1967         case TLDAP_INVALID_DN_SYNTAX:
1968                 res = "TLDAP_INVALID_DN_SYNTAX";
1969                 break;
1970         case TLDAP_IS_LEAF:
1971                 res = "TLDAP_IS_LEAF";
1972                 break;
1973         case TLDAP_ALIAS_DEREF_PROBLEM:
1974                 res = "TLDAP_ALIAS_DEREF_PROBLEM";
1975                 break;
1976         case TLDAP_INAPPROPRIATE_AUTH:
1977                 res = "TLDAP_INAPPROPRIATE_AUTH";
1978                 break;
1979         case TLDAP_INVALID_CREDENTIALS:
1980                 res = "TLDAP_INVALID_CREDENTIALS";
1981                 break;
1982         case TLDAP_INSUFFICIENT_ACCESS:
1983                 res = "TLDAP_INSUFFICIENT_ACCESS";
1984                 break;
1985         case TLDAP_BUSY:
1986                 res = "TLDAP_BUSY";
1987                 break;
1988         case TLDAP_UNAVAILABLE:
1989                 res = "TLDAP_UNAVAILABLE";
1990                 break;
1991         case TLDAP_UNWILLING_TO_PERFORM:
1992                 res = "TLDAP_UNWILLING_TO_PERFORM";
1993                 break;
1994         case TLDAP_LOOP_DETECT:
1995                 res = "TLDAP_LOOP_DETECT";
1996                 break;
1997         case TLDAP_NAMING_VIOLATION:
1998                 res = "TLDAP_NAMING_VIOLATION";
1999                 break;
2000         case TLDAP_OBJECT_CLASS_VIOLATION:
2001                 res = "TLDAP_OBJECT_CLASS_VIOLATION";
2002                 break;
2003         case TLDAP_NOT_ALLOWED_ON_NONLEAF:
2004                 res = "TLDAP_NOT_ALLOWED_ON_NONLEAF";
2005                 break;
2006         case TLDAP_NOT_ALLOWED_ON_RDN:
2007                 res = "TLDAP_NOT_ALLOWED_ON_RDN";
2008                 break;
2009         case TLDAP_ALREADY_EXISTS:
2010                 res = "TLDAP_ALREADY_EXISTS";
2011                 break;
2012         case TLDAP_NO_OBJECT_CLASS_MODS:
2013                 res = "TLDAP_NO_OBJECT_CLASS_MODS";
2014                 break;
2015         case TLDAP_RESULTS_TOO_LARGE:
2016                 res = "TLDAP_RESULTS_TOO_LARGE";
2017                 break;
2018         case TLDAP_AFFECTS_MULTIPLE_DSAS:
2019                 res = "TLDAP_AFFECTS_MULTIPLE_DSAS";
2020                 break;
2021         case TLDAP_OTHER:
2022                 res = "TLDAP_OTHER";
2023                 break;
2024         case TLDAP_SERVER_DOWN:
2025                 res = "TLDAP_SERVER_DOWN";
2026                 break;
2027         case TLDAP_LOCAL_ERROR:
2028                 res = "TLDAP_LOCAL_ERROR";
2029                 break;
2030         case TLDAP_ENCODING_ERROR:
2031                 res = "TLDAP_ENCODING_ERROR";
2032                 break;
2033         case TLDAP_DECODING_ERROR:
2034                 res = "TLDAP_DECODING_ERROR";
2035                 break;
2036         case TLDAP_TIMEOUT:
2037                 res = "TLDAP_TIMEOUT";
2038                 break;
2039         case TLDAP_AUTH_UNKNOWN:
2040                 res = "TLDAP_AUTH_UNKNOWN";
2041                 break;
2042         case TLDAP_FILTER_ERROR:
2043                 res = "TLDAP_FILTER_ERROR";
2044                 break;
2045         case TLDAP_USER_CANCELLED:
2046                 res = "TLDAP_USER_CANCELLED";
2047                 break;
2048         case TLDAP_PARAM_ERROR:
2049                 res = "TLDAP_PARAM_ERROR";
2050                 break;
2051         case TLDAP_NO_MEMORY:
2052                 res = "TLDAP_NO_MEMORY";
2053                 break;
2054         case TLDAP_CONNECT_ERROR:
2055                 res = "TLDAP_CONNECT_ERROR";
2056                 break;
2057         case TLDAP_NOT_SUPPORTED:
2058                 res = "TLDAP_NOT_SUPPORTED";
2059                 break;
2060         case TLDAP_CONTROL_NOT_FOUND:
2061                 res = "TLDAP_CONTROL_NOT_FOUND";
2062                 break;
2063         case TLDAP_NO_RESULTS_RETURNED:
2064                 res = "TLDAP_NO_RESULTS_RETURNED";
2065                 break;
2066         case TLDAP_MORE_RESULTS_TO_RETURN:
2067                 res = "TLDAP_MORE_RESULTS_TO_RETURN";
2068                 break;
2069         case TLDAP_CLIENT_LOOP:
2070                 res = "TLDAP_CLIENT_LOOP";
2071                 break;
2072         case TLDAP_REFERRAL_LIMIT_EXCEEDED:
2073                 res = "TLDAP_REFERRAL_LIMIT_EXCEEDED";
2074                 break;
2075         default:
2076                 res = talloc_asprintf(talloc_tos(), "Unknown LDAP Error (%d)",
2077                                       rc);
2078                 break;
2079         }
2080         if (res == NULL) {
2081                 res = "Unknown LDAP Error";
2082         }
2083         return res;
2084 }