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 static bool tldap_msg_set_pending(struct tevent_req *req);
  33
  34 #define TEVENT_TLDAP_RC_MAGIC (0x87bcd26e)
  35
  36 bool tevent_req_ldap_error(struct tevent_req *req, TLDAPRC rc)
  37 {
  38         uint64_t err;
  39
  40         if (TLDAP_RC_IS_SUCCESS(rc)) {
  41                 return false;
  42         }
  43
  44         err = TEVENT_TLDAP_RC_MAGIC;
  45         err <<= 32;
  46         err |= TLDAP_RC_V(rc);
  47
  48         return tevent_req_error(req, err);
  49 }
  50
  51 bool tevent_req_is_ldap_error(struct tevent_req *req, TLDAPRC *perr)
  52 {
  53         enum tevent_req_state state;
  54         uint64_t err;
  55
  56         if (!tevent_req_is_error(req, &state, &err)) {
  57                 return false;
  58         }
  59         switch (state) {
  60         case TEVENT_REQ_TIMED_OUT:
  61                 *perr = TLDAP_TIMEOUT;
  62                 break;
  63         case TEVENT_REQ_NO_MEMORY:
  64                 *perr = TLDAP_NO_MEMORY;
  65                 break;
  66         case TEVENT_REQ_USER_ERROR:
  67                 if ((err >> 32) != TEVENT_TLDAP_RC_MAGIC) {
  68                         abort();
  69                 }
  70                 *perr = TLDAP_RC(err & 0xffffffff);
  71                 break;
  72         default:
  73                 *perr = TLDAP_OPERATIONS_ERROR;
  74                 break;
  75         }
  76         return true;
  77 }
  78
  79 struct tldap_ctx_attribute {
  80         char *name;
  81         void *ptr;
  82 };
  83
  84 struct tldap_context {
  85         int ld_version;
  86         struct tstream_context *conn;
  87         int msgid;
  88         struct tevent_queue *outgoing;
  89         struct tevent_req **pending;
  90         struct tevent_req *read_req;
  91
  92         /* For the sync wrappers we need something like get_last_error... */
  93         struct tldap_message *last_msg;
  94
  95         /* debug */
  96         void (*log_fn)(void *context, enum tldap_debug_level level,
  97                        const char *fmt, va_list ap);
  98         void *log_private;
  99
 100         struct tldap_ctx_attribute *ctx_attrs;
 101 };
 102
 103 struct tldap_message {
 104         struct asn1_data *data;
 105         uint8_t *inbuf;
 106         int type;
 107         int id;
 108
 109         /* RESULT_ENTRY */
 110         char *dn;
 111         struct tldap_attribute *attribs;
 112
 113         /* Error data sent by the server */
 114         TLDAPRC lderr;
 115         char *res_matcheddn;
 116         char *res_diagnosticmessage;
 117         char *res_referral;
 118         DATA_BLOB res_serverSaslCreds;
 119         struct tldap_control *res_sctrls;
 120
 121         /* Controls sent by the server */
 122         struct tldap_control *ctrls;
 123 };
 124
 125 void tldap_set_debug(struct tldap_context *ld,
 126                      void (*log_fn)(void *log_private,
 127                                     enum tldap_debug_level level,
 128                                     const char *fmt,
 129                                     va_list ap) PRINTF_ATTRIBUTE(3,0),
 130                      void *log_private)
 131 {
 132         ld->log_fn = log_fn;
 133         ld->log_private = log_private;
 134 }
 135
 136 static void tldap_debug(
 137         struct tldap_context *ld,
 138         enum tldap_debug_level level,
 139         const char *fmt, ...) PRINTF_ATTRIBUTE(3,4);
 140
 141 static void tldap_debug(struct tldap_context *ld,
 142                          enum tldap_debug_level level,
 143                          const char *fmt, ...)
 144 {
 145         va_list ap;
 146         if (!ld) {
 147                 return;
 148         }
 149         if (ld->log_fn == NULL) {
 150                 return;
 151         }
 152         va_start(ap, fmt);
 153         ld->log_fn(ld->log_private, level, fmt, ap);
 154         va_end(ap);
 155 }
 156
 157 static int tldap_next_msgid(struct tldap_context *ld)
 158 {
 159         int result;
 160
 161         result = ld->msgid++;
 162         if (ld->msgid == INT_MAX) {
 163                 ld->msgid = 1;
 164         }
 165         return result;
 166 }
 167
 168 struct tldap_context *tldap_context_create(TALLOC_CTX *mem_ctx, int fd)
 169 {
 170         struct tldap_context *ctx;
 171         int ret;
 172
 173         ctx = talloc_zero(mem_ctx, struct tldap_context);
 174         if (ctx == NULL) {
 175                 return NULL;
 176         }
 177         ret = tstream_bsd_existing_socket(ctx, fd, &ctx->conn);
 178         if (ret == -1) {
 179                 TALLOC_FREE(ctx);
 180                 return NULL;
 181         }
 182         ctx->msgid = 1;
 183         ctx->ld_version = 3;
 184         ctx->outgoing = tevent_queue_create(ctx, "tldap_outgoing");
 185         if (ctx->outgoing == NULL) {
 186                 TALLOC_FREE(ctx);
 187                 return NULL;
 188         }
 189         return ctx;
 190 }
 191
 192 bool tldap_connection_ok(struct tldap_context *ld)
 193 {
 194         int ret;
 195
 196         if (ld == NULL) {
 197                 return false;
 198         }
 199
 200         if (ld->conn == NULL) {
 201                 return false;
 202         }
 203
 204         ret = tstream_pending_bytes(ld->conn);
 205         if (ret == -1) {
 206                 return false;
 207         }
 208
 209         return true;
 210 }
 211
 212 static size_t tldap_pending_reqs(struct tldap_context *ld)
 213 {
 214         return talloc_array_length(ld->pending);
 215 }
 216
 217 struct tstream_context *tldap_get_tstream(struct tldap_context *ld)
 218 {
 219         return ld->conn;
 220 }
 221
 222 void tldap_set_tstream(struct tldap_context *ld,
 223                        struct tstream_context *stream)
 224 {
 225         ld->conn = stream;
 226 }
 227
 228 static struct tldap_ctx_attribute *tldap_context_findattr(
 229         struct tldap_context *ld, const char *name)
 230 {
 231         size_t i, num_attrs;
 232
 233         num_attrs = talloc_array_length(ld->ctx_attrs);
 234
 235         for (i=0; i<num_attrs; i++) {
 236                 if (strcmp(ld->ctx_attrs[i].name, name) == 0) {
 237                         return &ld->ctx_attrs[i];
 238                 }
 239         }
 240         return NULL;
 241 }
 242
 243 bool tldap_context_setattr(struct tldap_context *ld,
 244                            const char *name, const void *_pptr)
 245 {
 246         struct tldap_ctx_attribute *tmp, *attr;
 247         char *tmpname;
 248         int num_attrs;
 249         void **pptr = (void **)discard_const_p(void,_pptr);
 250
 251         attr = tldap_context_findattr(ld, name);
 252         if (attr != NULL) {
 253                 /*
 254                  * We don't actually delete attrs, we don't expect tons of
 255                  * attributes being shuffled around.
 256                  */
 257                 TALLOC_FREE(attr->ptr);
 258                 if (*pptr != NULL) {
 259                         attr->ptr = talloc_move(ld->ctx_attrs, pptr);
 260                         *pptr = NULL;
 261                 }
 262                 return true;
 263         }
 264
 265         tmpname = talloc_strdup(ld, name);
 266         if (tmpname == NULL) {
 267                 return false;
 268         }
 269
 270         num_attrs = talloc_array_length(ld->ctx_attrs);
 271
 272         tmp = talloc_realloc(ld, ld->ctx_attrs, struct tldap_ctx_attribute,
 273                              num_attrs+1);
 274         if (tmp == NULL) {
 275                 TALLOC_FREE(tmpname);
 276                 return false;
 277         }
 278         tmp[num_attrs].name = talloc_move(tmp, &tmpname);
 279         if (*pptr != NULL) {
 280                 tmp[num_attrs].ptr = talloc_move(tmp, pptr);
 281         } else {
 282                 tmp[num_attrs].ptr = NULL;
 283         }
 284         *pptr = NULL;
 285         ld->ctx_attrs = tmp;
 286         return true;
 287 }
 288
 289 void *tldap_context_getattr(struct tldap_context *ld, const char *name)
 290 {
 291         struct tldap_ctx_attribute *attr = tldap_context_findattr(ld, name);
 292
 293         if (attr == NULL) {
 294                 return NULL;
 295         }
 296         return attr->ptr;
 297 }
 298
 299 struct read_ldap_state {
 300         uint8_t *buf;
 301         bool done;
 302 };
 303
 304 static ssize_t read_ldap_more(uint8_t *buf, size_t buflen, void *private_data);
 305 static void read_ldap_done(struct tevent_req *subreq);
 306
 307 static struct tevent_req *read_ldap_send(TALLOC_CTX *mem_ctx,
 308                                          struct tevent_context *ev,
 309                                          struct tstream_context *conn)
 310 {
 311         struct tevent_req *req, *subreq;
 312         struct read_ldap_state *state;
 313
 314         req = tevent_req_create(mem_ctx, &state, struct read_ldap_state);
 315         if (req == NULL) {
 316                 return NULL;
 317         }
 318         state->done = false;
 319
 320         subreq = tstream_read_packet_send(state, ev, conn, 2, read_ldap_more,
 321                                           state);
 322         if (tevent_req_nomem(subreq, req)) {
 323                 return tevent_req_post(req, ev);
 324         }
 325         tevent_req_set_callback(subreq, read_ldap_done, req);
 326         return req;
 327 }
 328
 329 static ssize_t read_ldap_more(uint8_t *buf, size_t buflen, void *private_data)
 330 {
 331         struct read_ldap_state *state = talloc_get_type_abort(
 332                 private_data, struct read_ldap_state);
 333         size_t len;
 334         int i, lensize;
 335
 336         if (state->done) {
 337                 /* We've been here, we're done */
 338                 return 0;
 339         }
 340
 341         /*
 342          * From ldap.h: LDAP_TAG_MESSAGE is 0x30
 343          */
 344         if (buf[0] != 0x30) {
 345                 return -1;
 346         }
 347
 348         len = buf[1];
 349         if ((len & 0x80) == 0) {
 350                 state->done = true;
 351                 return len;
 352         }
 353
 354         lensize = (len & 0x7f);
 355         len = 0;
 356
 357         if (buflen == 2) {
 358                 /* Please get us the full length */
 359                 return lensize;
 360         }
 361         if (buflen > 2 + lensize) {
 362                 state->done = true;
 363                 return 0;
 364         }
 365         if (buflen != 2 + lensize) {
 366                 return -1;
 367         }
 368
 369         for (i=0; i<lensize; i++) {
 370                 len = (len << 8) | buf[2+i];
 371         }
 372         return len;
 373 }
 374
 375 static void read_ldap_done(struct tevent_req *subreq)
 376 {
 377         struct tevent_req *req = tevent_req_callback_data(
 378                 subreq, struct tevent_req);
 379         struct read_ldap_state *state = tevent_req_data(
 380                 req, struct read_ldap_state);
 381         ssize_t nread;
 382         int err;
 383
 384         nread = tstream_read_packet_recv(subreq, state, &state->buf, &err);
 385         TALLOC_FREE(subreq);
 386         if (nread == -1) {
 387                 tevent_req_error(req, err);
 388                 return;
 389         }
 390         tevent_req_done(req);
 391 }
 392
 393 static ssize_t read_ldap_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
 394                               uint8_t **pbuf, int *perrno)
 395 {
 396         struct read_ldap_state *state = tevent_req_data(
 397                 req, struct read_ldap_state);
 398
 399         if (tevent_req_is_unix_error(req, perrno)) {
 400                 return -1;
 401         }
 402         *pbuf = talloc_move(mem_ctx, &state->buf);
 403         return talloc_get_size(*pbuf);
 404 }
 405
 406 struct tldap_msg_state {
 407         struct tldap_context *ld;
 408         struct tevent_context *ev;
 409         int id;
 410         struct iovec iov;
 411
 412         struct asn1_data *data;
 413         uint8_t *inbuf;
 414 };
 415
 416 static bool tldap_push_controls(struct asn1_data *data,
 417                                 struct tldap_control *sctrls,
 418                                 int num_sctrls)
 419 {
 420         int i;
 421
 422         if ((sctrls == NULL) || (num_sctrls == 0)) {
 423                 return true;
 424         }
 425
 426         if (!asn1_push_tag(data, ASN1_CONTEXT(0))) return false;
 427
 428         for (i=0; i<num_sctrls; i++) {
 429                 struct tldap_control *c = &sctrls[i];
 430                 if (!asn1_push_tag(data, ASN1_SEQUENCE(0))) return false;
 431                 if (!asn1_write_OctetString(data, c->oid, strlen(c->oid))) return false;
 432                 if (c->critical) {
 433                         if (!asn1_write_BOOLEAN(data, true)) return false;
 434                 }
 435                 if (c->value.data != NULL) {
 436                         if (!asn1_write_OctetString(data, c->value.data,
 437                                                c->value.length)) return false;
 438                 }
 439                 if (!asn1_pop_tag(data)) return false; /* ASN1_SEQUENCE(0) */
 440         }
 441
 442         return asn1_pop_tag(data); /* ASN1_CONTEXT(0) */
 443 }
 444
 445 #define tldap_context_disconnect(ld, status) \
 446         _tldap_context_disconnect(ld, status, __location__)
 447
 448 static void _tldap_context_disconnect(struct tldap_context *ld,
 449                                       TLDAPRC status,
 450                                       const char *location)
 451 {
 452         if (ld->conn == NULL) {
 453                 /*
 454                  * We don't need to tldap_debug() on
 455                  * a potential 2nd run.
 456                  *
 457                  * The rest of the function would just
 458                  * be a noop for the 2nd run anyway.
 459                  */
 460                 return;
 461         }
 462
 463         tldap_debug(ld, TLDAP_DEBUG_WARNING,
 464                     "tldap_context_disconnect: %s at %s\n",
 465                     tldap_rc2string(status),
 466                     location);
 467         tevent_queue_stop(ld->outgoing);
 468         TALLOC_FREE(ld->read_req);
 469         TALLOC_FREE(ld->conn);
 470
 471         while (talloc_array_length(ld->pending) > 0) {
 472                 struct tevent_req *req = NULL;
 473                 struct tldap_msg_state *state = NULL;
 474
 475                 req = ld->pending[0];
 476                 state = tevent_req_data(req, struct tldap_msg_state);
 477                 tevent_req_defer_callback(req, state->ev);
 478                 tevent_req_ldap_error(req, status);
 479         }
 480 }
 481
 482 static void tldap_msg_sent(struct tevent_req *subreq);
 483 static void tldap_msg_received(struct tevent_req *subreq);
 484
 485 static struct tevent_req *tldap_msg_send(TALLOC_CTX *mem_ctx,
 486                                          struct tevent_context *ev,
 487                                          struct tldap_context *ld,
 488                                          int id, struct asn1_data *data,
 489                                          struct tldap_control *sctrls,
 490                                          int num_sctrls)
 491 {
 492         struct tevent_req *req, *subreq;
 493         struct tldap_msg_state *state;
 494         DATA_BLOB blob;
 495         bool ok;
 496
 497         tldap_debug(ld, TLDAP_DEBUG_TRACE, "tldap_msg_send: sending msg %d\n",
 498                     id);
 499
 500         req = tevent_req_create(mem_ctx, &state, struct tldap_msg_state);
 501         if (req == NULL) {
 502                 return NULL;
 503         }
 504         state->ld = ld;
 505         state->ev = ev;
 506         state->id = id;
 507
 508         ok = tldap_connection_ok(ld);
 509         if (!ok) {
 510                 tevent_req_ldap_error(req, TLDAP_SERVER_DOWN);
 511                 return tevent_req_post(req, ev);
 512         }
 513
 514         if (!tldap_push_controls(data, sctrls, num_sctrls)) {
 515                 tevent_req_ldap_error(req, TLDAP_ENCODING_ERROR);
 516                 return tevent_req_post(req, ev);
 517         }
 518
 519
 520         if (!asn1_pop_tag(data)) {
 521                 tevent_req_ldap_error(req, TLDAP_ENCODING_ERROR);
 522                 return tevent_req_post(req, ev);
 523         }
 524
 525         if (!asn1_blob(data, &blob)) {
 526                 tevent_req_ldap_error(req, TLDAP_ENCODING_ERROR);
 527                 return tevent_req_post(req, ev);
 528         }
 529
 530         if (!tldap_msg_set_pending(req)) {
 531                 tevent_req_oom(req);
 532                 return tevent_req_post(req, ev);;
 533         }
 534
 535         state->iov.iov_base = (void *)blob.data;
 536         state->iov.iov_len = blob.length;
 537
 538         subreq = tstream_writev_queue_send(state, ev, ld->conn, ld->outgoing,
 539                                            &state->iov, 1);
 540         if (tevent_req_nomem(subreq, req)) {
 541                 return tevent_req_post(req, ev);
 542         }
 543         tevent_req_set_callback(subreq, tldap_msg_sent, req);
 544         return req;
 545 }
 546
 547 static void tldap_msg_unset_pending(struct tevent_req *req)
 548 {
 549         struct tldap_msg_state *state = tevent_req_data(
 550                 req, struct tldap_msg_state);
 551         struct tldap_context *ld = state->ld;
 552         int num_pending = tldap_pending_reqs(ld);
 553         int i;
 554
 555         tevent_req_set_cleanup_fn(req, NULL);
 556
 557         for (i=0; i<num_pending; i++) {
 558                 if (req == ld->pending[i]) {
 559                         break;
 560                 }
 561         }
 562         if (i == num_pending) {
 563                 /*
 564                  * Something's seriously broken. Just returning here is the
 565                  * right thing nevertheless, the point of this routine is to
 566                  * remove ourselves from cli->pending.
 567                  */
 568                 return;
 569         }
 570
 571         if (num_pending == 1) {
 572                 TALLOC_FREE(ld->pending);
 573                 return;
 574         }
 575
 576         /*
 577          * Remove ourselves from the cli->pending array
 578          */
 579         if (num_pending > 1) {
 580                 ld->pending[i] = ld->pending[num_pending-1];
 581         }
 582
 583         /*
 584          * No NULL check here, we're shrinking by sizeof(void *), and
 585          * talloc_realloc just adjusts the size for this.
 586          */
 587         ld->pending = talloc_realloc(NULL, ld->pending, struct tevent_req *,
 588                                      num_pending - 1);
 589 }
 590
 591 static void tldap_msg_cleanup(struct tevent_req *req,
 592                               enum tevent_req_state req_state)
 593 {
 594         tldap_msg_unset_pending(req);
 595 }
 596
 597 static bool tldap_msg_set_pending(struct tevent_req *req)
 598 {
 599         struct tldap_msg_state *state = tevent_req_data(
 600                 req, struct tldap_msg_state);
 601         struct tldap_context *ld;
 602         struct tevent_req **pending;
 603         int num_pending;
 604
 605         ld = state->ld;
 606         num_pending = tldap_pending_reqs(ld);
 607
 608         pending = talloc_realloc(ld, ld->pending, struct tevent_req *,
 609                                  num_pending+1);
 610         if (pending == NULL) {
 611                 return false;
 612         }
 613         pending[num_pending] = req;
 614         ld->pending = pending;
 615         tevent_req_set_cleanup_fn(req, tldap_msg_cleanup);
 616
 617         if (ld->read_req != NULL) {
 618                 return true;
 619         }
 620
 621         /*
 622          * We're the first one, add the read_ldap request that waits for the
 623          * answer from the server
 624          */
 625         ld->read_req = read_ldap_send(ld->pending, state->ev, ld->conn);
 626         if (ld->read_req == NULL) {
 627                 tldap_msg_unset_pending(req);
 628                 return false;
 629         }
 630         tevent_req_set_callback(ld->read_req, tldap_msg_received, ld);
 631         return true;
 632 }
 633
 634 static void tldap_msg_sent(struct tevent_req *subreq)
 635 {
 636         struct tevent_req *req = tevent_req_callback_data(
 637                 subreq, struct tevent_req);
 638         struct tldap_msg_state *state = tevent_req_data(
 639                 req, struct tldap_msg_state);
 640         ssize_t nwritten;
 641         int err;
 642
 643         nwritten = tstream_writev_queue_recv(subreq, &err);
 644         TALLOC_FREE(subreq);
 645         if (nwritten == -1) {
 646                 tldap_context_disconnect(state->ld, TLDAP_SERVER_DOWN);
 647                 return;
 648         }
 649 }
 650
 651 static int tldap_msg_msgid(struct tevent_req *req)
 652 {
 653         struct tldap_msg_state *state = tevent_req_data(
 654                 req, struct tldap_msg_state);
 655
 656         return state->id;
 657 }
 658
 659 static void tldap_msg_received(struct tevent_req *subreq)
 660 {
 661         struct tldap_context *ld = tevent_req_callback_data(
 662                 subreq, struct tldap_context);
 663         struct tevent_req *req;
 664         struct tldap_msg_state *state;
 665         struct asn1_data *data;
 666         uint8_t *inbuf;
 667         ssize_t received;
 668         size_t num_pending;
 669         size_t i;
 670         int err;
 671         TLDAPRC status = TLDAP_PROTOCOL_ERROR;
 672         int id;
 673         uint8_t type;
 674         bool ok;
 675
 676         received = read_ldap_recv(subreq, talloc_tos(), &inbuf, &err);
 677         TALLOC_FREE(subreq);
 678         ld->read_req = NULL;
 679         if (received == -1) {
 680                 status = TLDAP_SERVER_DOWN;
 681                 goto fail;
 682         }
 683
 684         data = asn1_init(talloc_tos(), ASN1_MAX_TREE_DEPTH);
 685         if (data == NULL) {
 686                 /*
 687                  * We have to disconnect all, we can't tell which of
 688                  * the requests this reply is for.
 689                  */
 690                 status = TLDAP_NO_MEMORY;
 691                 goto fail;
 692         }
 693         asn1_load_nocopy(data, inbuf, received);
 694
 695         ok = true;
 696         ok &= asn1_start_tag(data, ASN1_SEQUENCE(0));
 697         ok &= asn1_read_Integer(data, &id);
 698         ok &= asn1_peek_uint8(data, &type);
 699
 700         if (!ok) {
 701                 status = TLDAP_PROTOCOL_ERROR;
 702                 goto fail;
 703         }
 704
 705         tldap_debug(ld, TLDAP_DEBUG_TRACE, "tldap_msg_received: got msg %d "
 706                     "type %d\n", id, (int)type);
 707
 708         if (id == 0) {
 709                 tldap_debug(
 710                         ld,
 711                         TLDAP_DEBUG_WARNING,
 712                         "tldap_msg_received: got msgid 0 of "
 713                         "type %"PRIu8", disconnecting\n",
 714                         type);
 715                 tldap_context_disconnect(ld, TLDAP_SERVER_DOWN);
 716                 return;
 717         }
 718
 719         num_pending = talloc_array_length(ld->pending);
 720
 721         for (i=0; i<num_pending; i++) {
 722                 if (id == tldap_msg_msgid(ld->pending[i])) {
 723                         break;
 724                 }
 725         }
 726         if (i == num_pending) {
 727                 /* Dump unexpected reply */
 728                 tldap_debug(ld, TLDAP_DEBUG_WARNING, "tldap_msg_received: "
 729                             "No request pending for msg %d\n", id);
 730                 TALLOC_FREE(data);
 731                 TALLOC_FREE(inbuf);
 732                 goto done;
 733         }
 734
 735         req = ld->pending[i];
 736         state = tevent_req_data(req, struct tldap_msg_state);
 737
 738         state->inbuf = talloc_move(state, &inbuf);
 739         state->data = talloc_move(state, &data);
 740
 741         tldap_msg_unset_pending(req);
 742         num_pending = talloc_array_length(ld->pending);
 743
 744         tevent_req_defer_callback(req, state->ev);
 745         tevent_req_done(req);
 746
 747  done:
 748         if (num_pending == 0) {
 749                 return;
 750         }
 751
 752         state = tevent_req_data(ld->pending[0], struct tldap_msg_state);
 753         ld->read_req = read_ldap_send(ld->pending, state->ev, ld->conn);
 754         if (ld->read_req == NULL) {
 755                 status = TLDAP_NO_MEMORY;
 756                 goto fail;
 757         }
 758         tevent_req_set_callback(ld->read_req, tldap_msg_received, ld);
 759         return;
 760
 761  fail:
 762         tldap_context_disconnect(ld, status);
 763 }
 764
 765 static TLDAPRC tldap_msg_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
 766                               struct tldap_message **pmsg)
 767 {
 768         struct tldap_msg_state *state = tevent_req_data(
 769                 req, struct tldap_msg_state);
 770         struct tldap_message *msg;
 771         TLDAPRC err;
 772         uint8_t msgtype;
 773
 774         if (tevent_req_is_ldap_error(req, &err)) {
 775                 return err;
 776         }
 777
 778         if (!asn1_peek_uint8(state->data, &msgtype)) {
 779                 return TLDAP_PROTOCOL_ERROR;
 780         }
 781
 782         if (pmsg == NULL) {
 783                 return TLDAP_SUCCESS;
 784         }
 785
 786         msg = talloc_zero(mem_ctx, struct tldap_message);
 787         if (msg == NULL) {
 788                 return TLDAP_NO_MEMORY;
 789         }
 790         msg->id = state->id;
 791
 792         msg->inbuf = talloc_move(msg, &state->inbuf);
 793         msg->data = talloc_move(msg, &state->data);
 794         msg->type = msgtype;
 795
 796         *pmsg = msg;
 797         return TLDAP_SUCCESS;
 798 }
 799
 800 struct tldap_req_state {
 801         int id;
 802         struct asn1_data *out;
 803         struct tldap_message *result;
 804 };
 805
 806 static struct tevent_req *tldap_req_create(TALLOC_CTX *mem_ctx,
 807                                            struct tldap_context *ld,
 808                                            struct tldap_req_state **pstate)
 809 {
 810         struct tevent_req *req;
 811         struct tldap_req_state *state;
 812
 813         req = tevent_req_create(mem_ctx, &state, struct tldap_req_state);
 814         if (req == NULL) {
 815                 return NULL;
 816         }
 817         state->out = asn1_init(state, ASN1_MAX_TREE_DEPTH);
 818         if (state->out == NULL) {
 819                 goto err;
 820         }
 821         state->id = tldap_next_msgid(ld);
 822
 823         if (!asn1_push_tag(state->out, ASN1_SEQUENCE(0))) goto err;
 824         if (!asn1_write_Integer(state->out, state->id)) goto err;
 825
 826         *pstate = state;
 827         return req;
 828
 829   err:
 830
 831         TALLOC_FREE(req);
 832         return NULL;
 833 }
 834
 835 static void tldap_save_msg(struct tldap_context *ld, struct tevent_req *req)
 836 {
 837         struct tldap_req_state *state = tevent_req_data(
 838                 req, struct tldap_req_state);
 839
 840         TALLOC_FREE(ld->last_msg);
 841         ld->last_msg = talloc_move(ld, &state->result);
 842 }
 843
 844 static char *blob2string_talloc(TALLOC_CTX *mem_ctx, DATA_BLOB blob)
 845 {
 846         char *result = talloc_array(mem_ctx, char, blob.length+1);
 847
 848         if (result == NULL) {
 849                 return NULL;
 850         }
 851
 852         memcpy(result, blob.data, blob.length);
 853         result[blob.length] = '\0';
 854         return result;
 855 }
 856
 857 static bool asn1_read_OctetString_talloc(TALLOC_CTX *mem_ctx,
 858                                          struct asn1_data *data,
 859                                          char **presult)
 860 {
 861         DATA_BLOB string;
 862         char *result;
 863         if (!asn1_read_OctetString(data, mem_ctx, &string))
 864                 return false;
 865
 866         result = blob2string_talloc(mem_ctx, string);
 867
 868         data_blob_free(&string);
 869
 870         if (result == NULL) {
 871                 return false;
 872         }
 873         *presult = result;
 874         return true;
 875 }
 876
 877 static bool tldap_decode_controls(struct tldap_req_state *state);
 878
 879 static bool tldap_decode_response(struct tldap_req_state *state)
 880 {
 881         struct asn1_data *data = state->result->data;
 882         struct tldap_message *msg = state->result;
 883         int rc;
 884         bool ok = true;
 885
 886         ok &= asn1_read_enumerated(data, &rc);
 887         if (ok) {
 888                 msg->lderr = TLDAP_RC(rc);
 889         }
 890
 891         ok &= asn1_read_OctetString_talloc(msg, data, &msg->res_matcheddn);
 892         ok &= asn1_read_OctetString_talloc(msg, data,
 893                                            &msg->res_diagnosticmessage);
 894         if (!ok) return ok;
 895         if (asn1_peek_tag(data, ASN1_CONTEXT(3))) {
 896                 ok &= asn1_start_tag(data, ASN1_CONTEXT(3));
 897                 ok &= asn1_read_OctetString_talloc(msg, data,
 898                                                    &msg->res_referral);
 899                 ok &= asn1_end_tag(data);
 900         } else {
 901                 msg->res_referral = NULL;
 902         }
 903
 904         return ok;
 905 }
 906
 907 static void tldap_sasl_bind_done(struct tevent_req *subreq);
 908
 909 struct tevent_req *tldap_sasl_bind_send(TALLOC_CTX *mem_ctx,
 910                                         struct tevent_context *ev,
 911                                         struct tldap_context *ld,
 912                                         const char *dn,
 913                                         const char *mechanism,
 914                                         DATA_BLOB *creds,
 915                                         struct tldap_control *sctrls,
 916                                         int num_sctrls,
 917                                         struct tldap_control *cctrls,
 918                                         int num_cctrls)
 919 {
 920         struct tevent_req *req, *subreq;
 921         struct tldap_req_state *state;
 922
 923         req = tldap_req_create(mem_ctx, ld, &state);
 924         if (req == NULL) {
 925                 return NULL;
 926         }
 927
 928         if (dn == NULL) {
 929                 dn = "";
 930         }
 931
 932         if (!asn1_push_tag(state->out, TLDAP_REQ_BIND)) goto err;
 933         if (!asn1_write_Integer(state->out, ld->ld_version)) goto err;
 934         if (!asn1_write_OctetString(state->out, dn, strlen(dn))) goto err;
 935
 936         if (mechanism == NULL) {
 937                 if (!asn1_push_tag(state->out, ASN1_CONTEXT_SIMPLE(0))) goto err;
 938                 if (!asn1_write(state->out, creds->data, creds->length)) goto err;
 939                 if (!asn1_pop_tag(state->out)) goto err;
 940         } else {
 941                 if (!asn1_push_tag(state->out, ASN1_CONTEXT(3))) goto err;
 942                 if (!asn1_write_OctetString(state->out, mechanism,
 943                                        strlen(mechanism))) goto err;
 944                 if ((creds != NULL) && (creds->data != NULL)) {
 945                         if (!asn1_write_OctetString(state->out, creds->data,
 946                                                creds->length)) goto err;
 947                 }
 948                 if (!asn1_pop_tag(state->out)) goto err;
 949         }
 950
 951         if (!asn1_pop_tag(state->out)) goto err;
 952
 953         subreq = tldap_msg_send(state, ev, ld, state->id, state->out,
 954                                 sctrls, num_sctrls);
 955         if (tevent_req_nomem(subreq, req)) {
 956                 return tevent_req_post(req, ev);
 957         }
 958         tevent_req_set_callback(subreq, tldap_sasl_bind_done, req);
 959         return req;
 960
 961   err:
 962
 963         tevent_req_ldap_error(req, TLDAP_ENCODING_ERROR);
 964         return tevent_req_post(req, ev);
 965 }
 966
 967 static void tldap_sasl_bind_done(struct tevent_req *subreq)
 968 {
 969         struct tevent_req *req = tevent_req_callback_data(
 970                 subreq, struct tevent_req);
 971         struct tldap_req_state *state = tevent_req_data(
 972                 req, struct tldap_req_state);
 973         TLDAPRC rc;
 974         bool ok;
 975
 976         rc = tldap_msg_recv(subreq, state, &state->result);
 977         TALLOC_FREE(subreq);
 978         if (tevent_req_ldap_error(req, rc)) {
 979                 return;
 980         }
 981         if (state->result->type != TLDAP_RES_BIND) {
 982                 tevent_req_ldap_error(req, TLDAP_PROTOCOL_ERROR);
 983                 return;
 984         }
 985
 986         ok = asn1_start_tag(state->result->data, TLDAP_RES_BIND);
 987         ok &= tldap_decode_response(state);
 988
 989         if (asn1_peek_tag(state->result->data, ASN1_CONTEXT_SIMPLE(7))) {
 990                 int len;
 991
 992                 ok &= asn1_start_tag(state->result->data,
 993                                      ASN1_CONTEXT_SIMPLE(7));
 994                 if (!ok) {
 995                         goto decode_error;
 996                 }
 997
 998                 len = asn1_tag_remaining(state->result->data);
 999                 if (len == -1) {
1000                         goto decode_error;
1001                 }
1002
1003                 state->result->res_serverSaslCreds =
1004                         data_blob_talloc(state->result, NULL, len);
1005                 if (state->result->res_serverSaslCreds.data == NULL) {
1006                         goto decode_error;
1007                 }
1008
1009                 ok = asn1_read(state->result->data,
1010                                state->result->res_serverSaslCreds.data,
1011                                state->result->res_serverSaslCreds.length);
1012
1013                 ok &= asn1_end_tag(state->result->data);
1014         }
1015
1016         ok &= asn1_end_tag(state->result->data);
1017
1018         if (!ok) {
1019                 goto decode_error;
1020         }
1021
1022         if (!TLDAP_RC_IS_SUCCESS(state->result->lderr) &&
1023             !TLDAP_RC_EQUAL(state->result->lderr,
1024                             TLDAP_SASL_BIND_IN_PROGRESS)) {
1025                 tevent_req_ldap_error(req, state->result->lderr);
1026                 return;
1027         }
1028         tevent_req_done(req);
1029         return;
1030
1031 decode_error:
1032         tevent_req_ldap_error(req, TLDAP_DECODING_ERROR);
1033         return;
1034 }
1035
1036 TLDAPRC tldap_sasl_bind_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
1037                              DATA_BLOB *serverSaslCreds)
1038 {
1039         struct tldap_req_state *state = tevent_req_data(
1040                 req, struct tldap_req_state);
1041         TLDAPRC rc;
1042
1043         if (tevent_req_is_ldap_error(req, &rc)) {
1044                 return rc;
1045         }
1046
1047         if (serverSaslCreds != NULL) {
1048                 serverSaslCreds->data = talloc_move(
1049                         mem_ctx, &state->result->res_serverSaslCreds.data);
1050                 serverSaslCreds->length =
1051                         state->result->res_serverSaslCreds.length;
1052         }
1053
1054         return state->result->lderr;
1055 }
1056
1057 TLDAPRC tldap_sasl_bind(struct tldap_context *ld,
1058                         const char *dn,
1059                         const char *mechanism,
1060                         DATA_BLOB *creds,
1061                         struct tldap_control *sctrls,
1062                         int num_sctrls,
1063                         struct tldap_control *cctrls,
1064                         int num_cctrls,
1065                         TALLOC_CTX *mem_ctx,
1066                         DATA_BLOB *serverSaslCreds)
1067 {
1068         TALLOC_CTX *frame = talloc_stackframe();
1069         struct tevent_context *ev;
1070         struct tevent_req *req;
1071         TLDAPRC rc = TLDAP_NO_MEMORY;
1072
1073         ev = samba_tevent_context_init(frame);
1074         if (ev == NULL) {
1075                 goto fail;
1076         }
1077         req = tldap_sasl_bind_send(frame, ev, ld, dn, mechanism, creds,
1078                                    sctrls, num_sctrls, cctrls, num_cctrls);
1079         if (req == NULL) {
1080                 goto fail;
1081         }
1082         if (!tevent_req_poll(req, ev)) {
1083                 rc = TLDAP_OPERATIONS_ERROR;
1084                 goto fail;
1085         }
1086         rc = tldap_sasl_bind_recv(req, mem_ctx, serverSaslCreds);
1087         tldap_save_msg(ld, req);
1088  fail:
1089         TALLOC_FREE(frame);
1090         return rc;
1091 }
1092
1093 struct tevent_req *tldap_simple_bind_send(TALLOC_CTX *mem_ctx,
1094                                           struct tevent_context *ev,
1095                                           struct tldap_context *ld,
1096                                           const char *dn,
1097                                           const char *passwd)
1098 {
1099         DATA_BLOB cred;
1100
1101         if (passwd != NULL) {
1102                 cred.data = discard_const_p(uint8_t, passwd);
1103                 cred.length = strlen(passwd);
1104         } else {
1105                 cred.data = discard_const_p(uint8_t, "");
1106                 cred.length = 0;
1107         }
1108         return tldap_sasl_bind_send(mem_ctx, ev, ld, dn, NULL, &cred, NULL, 0,
1109                                     NULL, 0);
1110 }
1111
1112 TLDAPRC tldap_simple_bind_recv(struct tevent_req *req)
1113 {
1114         return tldap_sasl_bind_recv(req, NULL, NULL);
1115 }
1116
1117 TLDAPRC tldap_simple_bind(struct tldap_context *ld, const char *dn,
1118                           const char *passwd)
1119 {
1120         DATA_BLOB cred;
1121
1122         if (passwd != NULL) {
1123                 cred.data = discard_const_p(uint8_t, passwd);
1124                 cred.length = strlen(passwd);
1125         } else {
1126                 cred.data = discard_const_p(uint8_t, "");
1127                 cred.length = 0;
1128         }
1129         return tldap_sasl_bind(ld, dn, NULL, &cred, NULL, 0, NULL, 0,
1130                                NULL, NULL);
1131 }
1132
1133 /*****************************************************************************/
1134
1135 /* can't use isalpha() as only a strict set is valid for LDAP */
1136
1137 static bool tldap_is_alpha(char c)
1138 {
1139         return (((c >= 'a') && (c <= 'z')) || \
1140                 ((c >= 'A') && (c <= 'Z')));
1141 }
1142
1143 static bool tldap_is_adh(char c)
1144 {
1145         return tldap_is_alpha(c) || isdigit(c) || (c == '-');
1146 }
1147
1148 #define TLDAP_FILTER_AND  ASN1_CONTEXT(0)
1149 #define TLDAP_FILTER_OR   ASN1_CONTEXT(1)
1150 #define TLDAP_FILTER_NOT  ASN1_CONTEXT(2)
1151 #define TLDAP_FILTER_EQ   ASN1_CONTEXT(3)
1152 #define TLDAP_FILTER_SUB  ASN1_CONTEXT(4)
1153 #define TLDAP_FILTER_LE   ASN1_CONTEXT(5)
1154 #define TLDAP_FILTER_GE   ASN1_CONTEXT(6)
1155 #define TLDAP_FILTER_PRES ASN1_CONTEXT_SIMPLE(7)
1156 #define TLDAP_FILTER_APX  ASN1_CONTEXT(8)
1157 #define TLDAP_FILTER_EXT  ASN1_CONTEXT(9)
1158
1159 #define TLDAP_SUB_INI ASN1_CONTEXT_SIMPLE(0)
1160 #define TLDAP_SUB_ANY ASN1_CONTEXT_SIMPLE(1)
1161 #define TLDAP_SUB_FIN ASN1_CONTEXT_SIMPLE(2)
1162
1163
1164 /* oid's should be numerical only in theory,
1165  * but apparently some broken servers may have alphanum aliases instead.
1166  * Do like openldap libraries and allow alphanum aliases for oids, but
1167  * do not allow Tagging options in that case.
1168  */
1169 static bool tldap_is_attrdesc(const char *s, int len, bool no_tagopts)
1170 {
1171         bool is_oid = false;
1172         bool dot = false;
1173         int i;
1174
1175         /* first char has stricter rules */
1176         if (isdigit(*s)) {
1177                 is_oid = true;
1178         } else if (!tldap_is_alpha(*s)) {
1179                 /* bad first char */
1180                 return false;
1181         }
1182
1183         for (i = 1; i < len; i++) {
1184
1185                 if (is_oid) {
1186                         if (isdigit(s[i])) {
1187                                 dot = false;
1188                                 continue;
1189                         }
1190                         if (s[i] == '.') {
1191                                 if (dot) {
1192                                         /* malformed */
1193                                         return false;
1194                                 }
1195                                 dot = true;
1196                                 continue;
1197                         }
1198                 } else {
1199                         if (tldap_is_adh(s[i])) {
1200                                 continue;
1201                         }
1202                 }
1203
1204                 if (s[i] == ';') {
1205                         if (no_tagopts) {
1206                                 /* no tagging options */
1207                                 return false;
1208                         }
1209                         if (dot) {
1210                                 /* malformed */
1211                                 return false;
1212                         }
1213                         if ((i + 1) == len) {
1214                                 /* malformed */
1215                                 return false;
1216                         }
1217
1218                         is_oid = false;
1219                         continue;
1220                 }
1221         }
1222
1223         if (dot) {
1224                 /* malformed */
1225                 return false;
1226         }
1227
1228         return true;
1229 }
1230
1231 /* this function copies the value until the closing parenthesis is found. */
1232 static char *tldap_get_val(TALLOC_CTX *memctx,
1233                            const char *value, const char **_s)
1234 {
1235         const char *s = value;
1236
1237         /* find terminator */
1238         while (*s) {
1239                 s = strchr(s, ')');
1240                 if (s && (*(s - 1) == '\\')) {
1241                         continue;
1242                 }
1243                 break;
1244         }
1245         if (!s || !(*s == ')')) {
1246                 /* malformed filter */
1247                 return NULL;
1248         }
1249
1250         *_s = s;
1251
1252         return talloc_strndup(memctx, value, s - value);
1253 }
1254
1255 static int tldap_hex2char(const char *x)
1256 {
1257         if (isxdigit(x[0]) && isxdigit(x[1])) {
1258                 const char h1 = x[0], h2 = x[1];
1259                 int c = 0;
1260
1261                 if (h1 >= 'a') c = h1 - (int)'a' + 10;
1262                 else if (h1 >= 'A') c = h1 - (int)'A' + 10;
1263                 else if (h1 >= '0') c = h1 - (int)'0';
1264                 c = c << 4;
1265                 if (h2 >= 'a') c += h2 - (int)'a' + 10;
1266                 else if (h2 >= 'A') c += h2 - (int)'A' + 10;
1267                 else if (h2 >= '0') c += h2 - (int)'0';
1268
1269                 return c;
1270         }
1271
1272         return -1;
1273 }
1274
1275 static bool tldap_find_first_star(const char *val, const char **star)
1276 {
1277         const char *s;
1278
1279         for (s = val; *s; s++) {
1280                 switch (*s) {
1281                 case '\\':
1282                         if (isxdigit(s[1]) && isxdigit(s[2])) {
1283                                 s += 2;
1284                                 break;
1285                         }
1286                         /* not hex based escape, check older syntax */
1287                         switch (s[1]) {
1288                         case '(':
1289                         case ')':
1290                         case '*':
1291                         case '\\':
1292                                 s++;
1293                                 break;
1294                         default:
1295                                 /* invalid escape sequence */
1296                                 return false;
1297                         }
1298                         break;
1299                 case ')':
1300                         /* end of val, nothing found */
1301                         *star = s;
1302                         return true;
1303
1304                 case '*':
1305                         *star = s;
1306                         return true;
1307                 }
1308         }
1309
1310         /* string ended without closing parenthesis, filter is malformed */
1311         return false;
1312 }
1313
1314 static bool tldap_unescape_inplace(char *value, size_t *val_len)
1315 {
1316         int c;
1317         size_t i, p;
1318
1319         for (i = 0,p = 0; i < *val_len; i++) {
1320
1321                 switch (value[i]) {
1322                 case '(':
1323                 case ')':
1324                 case '*':
1325                         /* these must be escaped */
1326                         return false;
1327
1328                 case '\\':
1329                         if (!value[i + 1]) {
1330                                 /* invalid EOL */
1331                                 return false;
1332                         }
1333                         i++;
1334
1335                         /* LDAPv3 escaped */
1336                         c = tldap_hex2char(&value[i]);
1337                         if (c >= 0 && c < 256) {
1338                                 value[p] = c;
1339                                 i++;
1340                                 p++;
1341                                 break;
1342                         }
1343
1344                         /* LDAPv2 escaped */
1345                         switch (value[i]) {
1346                         case '(':
1347                         case ')':
1348                         case '*':
1349                         case '\\':
1350                                 value[p] = value[i];
1351                                 p++;
1352
1353                                 break;
1354                         default:
1355                                 /* invalid */
1356                                 return false;
1357                         }
1358                         break;
1359
1360                 default:
1361                         value[p] = value[i];
1362                         p++;
1363                 }
1364         }
1365         value[p] = '\0';
1366         *val_len = p;
1367         return true;
1368 }
1369
1370 static bool tldap_push_filter_basic(struct tldap_context *ld,
1371                                     struct asn1_data *data,
1372                                     const char **_s);
1373 static bool tldap_push_filter_substring(struct tldap_context *ld,
1374                                         struct asn1_data *data,
1375                                         const char *val,
1376                                         const char **_s);
1377 static bool tldap_push_filter_int(struct tldap_context *ld,
1378                                   struct asn1_data *data,
1379                                   const char **_s)
1380 {
1381         const char *s = *_s;
1382         bool ret;
1383
1384         if (*s != '(') {
1385                 tldap_debug(ld, TLDAP_DEBUG_ERROR,
1386                             "Incomplete or malformed filter\n");
1387                 return false;
1388         }
1389         s++;
1390
1391         /* we are right after a parenthesis,
1392          * find out what op we have at hand */
1393         switch (*s) {
1394         case '&':
1395                 tldap_debug(ld, TLDAP_DEBUG_TRACE, "Filter op: AND\n");
1396                 if (!asn1_push_tag(data, TLDAP_FILTER_AND)) return false;
1397                 s++;
1398                 break;
1399
1400         case '|':
1401                 tldap_debug(ld, TLDAP_DEBUG_TRACE, "Filter op: OR\n");
1402                 if (!asn1_push_tag(data, TLDAP_FILTER_OR)) return false;
1403                 s++;
1404                 break;
1405
1406         case '!':
1407                 tldap_debug(ld, TLDAP_DEBUG_TRACE, "Filter op: NOT\n");
1408                 if (!asn1_push_tag(data, TLDAP_FILTER_NOT)) return false;
1409                 s++;
1410                 ret = tldap_push_filter_int(ld, data, &s);
1411                 if (!ret) {
1412                         return false;
1413                 }
1414                 if (!asn1_pop_tag(data)) return false;
1415                 goto done;
1416
1417         case '(':
1418         case ')':
1419                 tldap_debug(ld, TLDAP_DEBUG_ERROR,
1420                             "Invalid parenthesis '%c'\n", *s);
1421                 return false;
1422
1423         case '\0':
1424                 tldap_debug(ld, TLDAP_DEBUG_ERROR,
1425                             "Invalid filter termination\n");
1426                 return false;
1427
1428         default:
1429                 ret = tldap_push_filter_basic(ld, data, &s);
1430                 if (!ret) {
1431                         return false;
1432                 }
1433                 goto done;
1434         }
1435
1436         /* only and/or filters get here.
1437          * go through the list of filters */
1438
1439         if (*s == ')') {
1440                 /* RFC 4526: empty and/or */
1441                 if (!asn1_pop_tag(data)) return false;
1442                 goto done;
1443         }
1444
1445         while (*s) {
1446                 ret = tldap_push_filter_int(ld, data, &s);
1447                 if (!ret) {
1448                         return false;
1449                 }
1450
1451                 if (*s == ')') {
1452                         /* end of list, return */
1453                         if (!asn1_pop_tag(data)) return false;
1454                         break;
1455                 }
1456         }
1457
1458 done:
1459         if (*s != ')') {
1460                 tldap_debug(ld, TLDAP_DEBUG_ERROR,
1461                             "Incomplete or malformed filter\n");
1462                 return false;
1463         }
1464         s++;
1465
1466         if (asn1_has_error(data)) {
1467                 return false;
1468         }
1469
1470         *_s = s;
1471         return true;
1472 }
1473
1474
1475 static bool tldap_push_filter_basic(struct tldap_context *ld,
1476                                     struct asn1_data *data,
1477                                     const char **_s)
1478 {
1479         TALLOC_CTX *tmpctx = talloc_tos();
1480         const char *s = *_s;
1481         const char *e;
1482         const char *eq;
1483         const char *val;
1484         const char *type;
1485         const char *dn;
1486         const char *rule;
1487         const char *star;
1488         size_t type_len = 0;
1489         char *uval;
1490         size_t uval_len;
1491         bool write_octect = true;
1492         bool ret;
1493
1494         eq = strchr(s, '=');
1495         if (!eq) {
1496                 tldap_debug(ld, TLDAP_DEBUG_ERROR,
1497                             "Invalid filter, missing equal sign\n");
1498                 return false;
1499         }
1500
1501         val = eq + 1;
1502         e = eq - 1;
1503
1504         switch (*e) {
1505         case '<':
1506                 if (!asn1_push_tag(data, TLDAP_FILTER_LE)) return false;
1507                 break;
1508
1509         case '>':
1510                 if (!asn1_push_tag(data, TLDAP_FILTER_GE)) return false;
1511                 break;
1512
1513         case '~':
1514                 if (!asn1_push_tag(data, TLDAP_FILTER_APX)) return false;
1515                 break;
1516
1517         case ':':
1518                 if (!asn1_push_tag(data, TLDAP_FILTER_EXT)) return false;
1519                 write_octect = false;
1520
1521                 type = NULL;
1522                 dn = NULL;
1523                 rule = NULL;
1524
1525                 if (*s == ':') { /* [:dn]:rule:= value */
1526                         if (s == e) {
1527                                 /* malformed filter */
1528                                 return false;
1529                         }
1530                         dn = s;
1531                 } else { /* type[:dn][:rule]:= value */
1532                         type = s;
1533                         dn = strchr(s, ':');
1534                         type_len = dn - type;
1535                         if (dn == e) { /* type:= value */
1536                                 dn = NULL;
1537                         }
1538                 }
1539                 if (dn) {
1540                         dn++;
1541
1542                         rule = strchr(dn, ':');
1543                         if (rule == NULL) {
1544                                 return false;
1545                         }
1546                         if ((rule == dn + 1) || rule + 1 == e) {
1547                                 /* malformed filter, contains "::" */
1548                                 return false;
1549                         }
1550
1551                         if (strncasecmp_m(dn, "dn:", 3) != 0) {
1552                                 if (rule == e) {
1553                                         rule = dn;
1554                                         dn = NULL;
1555                                 } else {
1556                                         /* malformed filter. With two
1557                                          * optionals, the first must be "dn"
1558                                          */
1559                                         return false;
1560                                 }
1561                         } else {
1562                                 if (rule == e) {
1563                                         rule = NULL;
1564                                 } else {
1565                                         rule++;
1566                                 }
1567                         }
1568                 }
1569
1570                 if (!type && !dn && !rule) {
1571                         /* malformed filter, there must be at least one */
1572                         return false;
1573                 }
1574
1575                 /*
1576                   MatchingRuleAssertion ::= SEQUENCE {
1577                   matchingRule    [1] MatchingRuleID OPTIONAL,
1578                   type      [2] AttributeDescription OPTIONAL,
1579                   matchValue      [3] AssertionValue,
1580                   dnAttributes    [4] BOOLEAN DEFAULT FALSE
1581                   }
1582                 */
1583
1584                 /* check and add rule */
1585                 if (rule) {
1586                         ret = tldap_is_attrdesc(rule, e - rule, true);
1587                         if (!ret) {
1588                                 return false;
1589                         }
1590                         if (!asn1_push_tag(data, ASN1_CONTEXT_SIMPLE(1))) return false;
1591                         if (!asn1_write(data, rule, e - rule)) return false;
1592                         if (!asn1_pop_tag(data)) return false;
1593                 }
1594
1595                 /* check and add type */
1596                 if (type) {
1597                         ret = tldap_is_attrdesc(type, type_len, false);
1598                         if (!ret) {
1599                                 return false;
1600                         }
1601                         if (!asn1_push_tag(data, ASN1_CONTEXT_SIMPLE(2))) return false;
1602                         if (!asn1_write(data, type, type_len)) return false;
1603                         if (!asn1_pop_tag(data)) return false;
1604                 }
1605
1606                 uval = tldap_get_val(tmpctx, val, _s);
1607                 if (!uval) {
1608                         return false;
1609                 }
1610                 uval_len = *_s - val;
1611                 ret = tldap_unescape_inplace(uval, &uval_len);
1612                 if (!ret) {
1613                         return false;
1614                 }
1615
1616                 if (!asn1_push_tag(data, ASN1_CONTEXT_SIMPLE(3))) return false;
1617                 if (!asn1_write(data, uval, uval_len)) return false;
1618                 if (!asn1_pop_tag(data)) return false;
1619
1620                 if (!asn1_push_tag(data, ASN1_CONTEXT_SIMPLE(4))) return false;
1621                 if (!asn1_write_uint8(data, dn?1:0)) return false;
1622                 if (!asn1_pop_tag(data)) return false;
1623                 break;
1624
1625         default:
1626                 e = eq;
1627
1628                 ret = tldap_is_attrdesc(s, e - s, false);
1629                 if (!ret) {
1630                         return false;
1631                 }
1632
1633                 if (strncmp(val, "*)", 2) == 0) {
1634                         /* presence */
1635                         if (!asn1_push_tag(data, TLDAP_FILTER_PRES)) return false;
1636                         if (!asn1_write(data, s, e - s)) return false;
1637                         *_s = val + 1;
1638                         write_octect = false;
1639                         break;
1640                 }
1641
1642                 ret = tldap_find_first_star(val, &star);
1643                 if (!ret) {
1644                         return false;
1645                 }
1646                 if (*star == '*') {
1647                         /* substring */
1648                         if (!asn1_push_tag(data, TLDAP_FILTER_SUB)) return false;
1649                         if (!asn1_write_OctetString(data, s, e - s)) return false;
1650                         ret = tldap_push_filter_substring(ld, data, val, &s);
1651                         if (!ret) {
1652                                 return false;
1653                         }
1654                         *_s = s;
1655                         write_octect = false;
1656                         break;
1657                 }
1658
1659                 /* if nothing else, then it is just equality */
1660                 if (!asn1_push_tag(data, TLDAP_FILTER_EQ)) return false;
1661                 write_octect = true;
1662                 break;
1663         }
1664
1665         if (write_octect) {
1666                 uval = tldap_get_val(tmpctx, val, _s);
1667                 if (!uval) {
1668                         return false;
1669                 }
1670                 uval_len = *_s - val;
1671                 ret = tldap_unescape_inplace(uval, &uval_len);
1672                 if (!ret) {
1673                         return false;
1674                 }
1675
1676                 if (!asn1_write_OctetString(data, s, e - s)) return false;
1677                 if (!asn1_write_OctetString(data, uval, uval_len)) return false;
1678         }
1679
1680         if (asn1_has_error(data)) {
1681                 return false;
1682         }
1683         return asn1_pop_tag(data);
1684 }
1685
1686 static bool tldap_push_filter_substring(struct tldap_context *ld,
1687                                         struct asn1_data *data,
1688                                         const char *val,
1689                                         const char **_s)
1690 {
1691         TALLOC_CTX *tmpctx = talloc_tos();
1692         bool initial = true;
1693         const char *star;
1694         char *chunk;
1695         size_t chunk_len;
1696         bool ret;
1697
1698         /*
1699           SubstringFilter ::= SEQUENCE {
1700                   type      AttributeDescription,
1701                   -- at least one must be present
1702                   substrings      SEQUENCE OF CHOICE {
1703                           initial [0] LDAPString,
1704                           any     [1] LDAPString,
1705                           final   [2] LDAPString } }
1706         */
1707         if (!asn1_push_tag(data, ASN1_SEQUENCE(0))) return false;
1708
1709         do {
1710                 ret = tldap_find_first_star(val, &star);
1711                 if (!ret) {
1712                         return false;
1713                 }
1714                 chunk_len = star - val;
1715
1716                 switch (*star) {
1717                 case '*':
1718                         if (!initial && chunk_len == 0) {
1719                                 /* found '**', which is illegal */
1720                                 return false;
1721                         }
1722                         break;
1723                 case ')':
1724                         if (initial) {
1725                                 /* no stars ?? */
1726                                 return false;
1727                         }
1728                         /* we are done */
1729                         break;
1730                 default:
1731                         /* ?? */
1732                         return false;
1733                 }
1734
1735                 if (initial && chunk_len == 0) {
1736                         val = star + 1;
1737                         initial = false;
1738                         continue;
1739                 }
1740
1741                 chunk = talloc_strndup(tmpctx, val, chunk_len);
1742                 if (!chunk) {
1743                         return false;
1744                 }
1745                 ret = tldap_unescape_inplace(chunk, &chunk_len);
1746                 if (!ret) {
1747                         return false;
1748                 }
1749                 switch (*star) {
1750                 case '*':
1751                         if (initial) {
1752                                 if (!asn1_push_tag(data, TLDAP_SUB_INI)) return false;
1753                                 initial = false;
1754                         } else {
1755                                 if (!asn1_push_tag(data, TLDAP_SUB_ANY)) return false;
1756                         }
1757                         break;
1758                 case ')':
1759                         if (!asn1_push_tag(data, TLDAP_SUB_FIN)) return false;
1760                         break;
1761                 default:
1762                         /* ?? */
1763                         return false;
1764                 }
1765                 if (!asn1_write(data, chunk, chunk_len)) return false;
1766                 if (!asn1_pop_tag(data)) return false;
1767
1768                 val = star + 1;
1769
1770         } while (*star == '*');
1771
1772         *_s = star;
1773
1774         /* end of sequence */
1775         return asn1_pop_tag(data);
1776 }
1777
1778 /* NOTE: although openldap libraries allow for spaces in some places, mosly
1779  * around parenthesis, we do not allow any spaces (except in values of
1780  * course) as I couldn't fine any place in RFC 4512 or RFC 4515 where
1781  * leading or trailing spaces where allowed.
1782  */
1783 static bool tldap_push_filter(struct tldap_context *ld,
1784                               struct asn1_data *data,
1785                               const char *filter)
1786 {
1787         const char *s = filter;
1788         bool ret;
1789
1790         ret = tldap_push_filter_int(ld, data, &s);
1791         if (ret && *s) {
1792                 tldap_debug(ld, TLDAP_DEBUG_ERROR,
1793                             "Incomplete or malformed filter\n");
1794                 return false;
1795         }
1796         return ret;
1797 }
1798
1799 /*****************************************************************************/
1800
1801 static void tldap_search_done(struct tevent_req *subreq);
1802
1803 struct tevent_req *tldap_search_send(TALLOC_CTX *mem_ctx,
1804                                      struct tevent_context *ev,
1805                                      struct tldap_context *ld,
1806                                      const char *base, int scope,
1807                                      const char *filter,
1808                                      const char **attrs,
1809                                      int num_attrs,
1810                                      int attrsonly,
1811                                      struct tldap_control *sctrls,
1812                                      int num_sctrls,
1813                                      struct tldap_control *cctrls,
1814                                      int num_cctrls,
1815                                      int timelimit,
1816                                      int sizelimit,
1817                                      int deref)
1818 {
1819         struct tevent_req *req, *subreq;
1820         struct tldap_req_state *state;
1821         int i;
1822
1823         req = tldap_req_create(mem_ctx, ld, &state);
1824         if (req == NULL) {
1825                 return NULL;
1826         }
1827
1828         if (!asn1_push_tag(state->out, TLDAP_REQ_SEARCH)) goto encoding_error;
1829         if (!asn1_write_OctetString(state->out, base, strlen(base))) goto encoding_error;
1830         if (!asn1_write_enumerated(state->out, scope)) goto encoding_error;
1831         if (!asn1_write_enumerated(state->out, deref)) goto encoding_error;
1832         if (!asn1_write_Integer(state->out, sizelimit)) goto encoding_error;
1833         if (!asn1_write_Integer(state->out, timelimit)) goto encoding_error;
1834         if (!asn1_write_BOOLEAN(state->out, attrsonly)) goto encoding_error;
1835
1836         if (!tldap_push_filter(ld, state->out, filter)) {
1837                 goto encoding_error;
1838         }
1839
1840         if (!asn1_push_tag(state->out, ASN1_SEQUENCE(0))) goto encoding_error;
1841         for (i=0; i<num_attrs; i++) {
1842                 if (!asn1_write_OctetString(state->out, attrs[i], strlen(attrs[i]))) goto encoding_error;
1843         }
1844         if (!asn1_pop_tag(state->out)) goto encoding_error;
1845         if (!asn1_pop_tag(state->out)) goto encoding_error;
1846
1847         subreq = tldap_msg_send(state, ev, ld, state->id, state->out,
1848                                 sctrls, num_sctrls);
1849         if (tevent_req_nomem(subreq, req)) {
1850                 return tevent_req_post(req, ev);
1851         }
1852         tevent_req_set_callback(subreq, tldap_search_done, req);
1853         return req;
1854
1855  encoding_error:
1856         tevent_req_ldap_error(req, TLDAP_ENCODING_ERROR);
1857         return tevent_req_post(req, ev);
1858 }
1859
1860 static void tldap_search_done(struct tevent_req *subreq)
1861 {
1862         struct tevent_req *req = tevent_req_callback_data(
1863                 subreq, struct tevent_req);
1864         struct tldap_req_state *state = tevent_req_data(
1865                 req, struct tldap_req_state);
1866         TLDAPRC rc;
1867
1868         rc = tldap_msg_recv(subreq, state, &state->result);
1869         if (tevent_req_ldap_error(req, rc)) {
1870                 return;
1871         }
1872         switch (state->result->type) {
1873         case TLDAP_RES_SEARCH_ENTRY:
1874         case TLDAP_RES_SEARCH_REFERENCE:
1875                 if (!tldap_msg_set_pending(subreq)) {
1876                         tevent_req_oom(req);
1877                         return;
1878                 }
1879                 tevent_req_notify_callback(req);
1880                 break;
1881         case TLDAP_RES_SEARCH_RESULT:
1882                 TALLOC_FREE(subreq);
1883                 if (!asn1_start_tag(state->result->data,
1884                                     state->result->type) ||
1885                     !tldap_decode_response(state) ||
1886                     !asn1_end_tag(state->result->data) ||
1887                     !tldap_decode_controls(state)) {
1888                         tevent_req_ldap_error(req, TLDAP_DECODING_ERROR);
1889                         return;
1890                 }
1891                 tevent_req_done(req);
1892                 break;
1893         default:
1894                 tevent_req_ldap_error(req, TLDAP_PROTOCOL_ERROR);
1895                 return;
1896         }
1897 }
1898
1899 TLDAPRC tldap_search_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
1900                           struct tldap_message **pmsg)
1901 {
1902         struct tldap_req_state *state = tevent_req_data(
1903                 req, struct tldap_req_state);
1904         TLDAPRC rc;
1905
1906         if (!tevent_req_is_in_progress(req)
1907             && tevent_req_is_ldap_error(req, &rc)) {
1908                 return rc;
1909         }
1910
1911         if (tevent_req_is_in_progress(req)) {
1912                 switch (state->result->type) {
1913                 case TLDAP_RES_SEARCH_ENTRY:
1914                 case TLDAP_RES_SEARCH_REFERENCE:
1915                         break;
1916                 default:
1917                         return TLDAP_OPERATIONS_ERROR;
1918                 }
1919         }
1920
1921         *pmsg = talloc_move(mem_ctx, &state->result);
1922         return TLDAP_SUCCESS;
1923 }
1924
1925 struct tldap_search_all_state {
1926         struct tldap_message **msgs;
1927         struct tldap_message *result;
1928 };
1929
1930 static void tldap_search_all_done(struct tevent_req *subreq);
1931
1932 struct tevent_req *tldap_search_all_send(
1933         TALLOC_CTX *mem_ctx, struct tevent_context *ev,
1934         struct tldap_context *ld, const char *base, int scope,
1935         const char *filter, const char **attrs, int num_attrs, int attrsonly,
1936         struct tldap_control *sctrls, int num_sctrls,
1937         struct tldap_control *cctrls, int num_cctrls,
1938         int timelimit, int sizelimit, int deref)
1939 {
1940         struct tevent_req *req, *subreq;
1941         struct tldap_search_all_state *state;
1942
1943         req = tevent_req_create(mem_ctx, &state,
1944                                 struct tldap_search_all_state);
1945         if (req == NULL) {
1946                 return NULL;
1947         }
1948
1949         subreq = tldap_search_send(state, ev, ld, base, scope, filter,
1950                                    attrs, num_attrs, attrsonly,
1951                                    sctrls, num_sctrls, cctrls, num_cctrls,
1952                                    timelimit, sizelimit, deref);
1953         if (tevent_req_nomem(subreq, req)) {
1954                 return tevent_req_post(req, ev);
1955         }
1956         tevent_req_set_callback(subreq, tldap_search_all_done, req);
1957         return req;
1958 }
1959
1960 static void tldap_search_all_done(struct tevent_req *subreq)
1961 {
1962         struct tevent_req *req = tevent_req_callback_data(
1963                 subreq, struct tevent_req);
1964         struct tldap_search_all_state *state = tevent_req_data(
1965                 req, struct tldap_search_all_state);
1966         struct tldap_message *msg, **tmp;
1967         size_t num_msgs;
1968         TLDAPRC rc;
1969         int msgtype;
1970
1971         rc = tldap_search_recv(subreq, state, &msg);
1972         /* No TALLOC_FREE(subreq), this is multi-step */
1973         if (tevent_req_ldap_error(req, rc)) {
1974                 return;
1975         }
1976
1977         msgtype = tldap_msg_type(msg);
1978         if (msgtype == TLDAP_RES_SEARCH_RESULT) {
1979                 state->result = msg;
1980                 tevent_req_done(req);
1981                 return;
1982         }
1983
1984         num_msgs = talloc_array_length(state->msgs);
1985
1986         tmp = talloc_realloc(state, state->msgs, struct tldap_message *,
1987                              num_msgs + 1);
1988         if (tevent_req_nomem(tmp, req)) {
1989                 return;
1990         }
1991         state->msgs = tmp;
1992         state->msgs[num_msgs] = talloc_move(state->msgs, &msg);
1993 }
1994
1995 TLDAPRC tldap_search_all_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
1996                               struct tldap_message ***msgs,
1997                               struct tldap_message **result)
1998 {
1999         struct tldap_search_all_state *state = tevent_req_data(
2000                 req, struct tldap_search_all_state);
2001         TLDAPRC rc;
2002
2003         if (tevent_req_is_ldap_error(req, &rc)) {
2004                 return rc;
2005         }
2006
2007         if (msgs != NULL) {
2008                 *msgs = talloc_move(mem_ctx, &state->msgs);
2009         }
2010         if (result != NULL) {
2011                 *result = talloc_move(mem_ctx, &state->result);
2012         }
2013
2014         return TLDAP_SUCCESS;
2015 }
2016
2017 TLDAPRC tldap_search(struct tldap_context *ld,
2018                      const char *base, int scope, const char *filter,
2019                      const char **attrs, int num_attrs, int attrsonly,
2020                      struct tldap_control *sctrls, int num_sctrls,
2021                      struct tldap_control *cctrls, int num_cctrls,
2022                      int timelimit, int sizelimit, int deref,
2023                      TALLOC_CTX *mem_ctx, struct tldap_message ***pmsgs)
2024 {
2025         TALLOC_CTX *frame;
2026         struct tevent_context *ev;
2027         struct tevent_req *req;
2028         TLDAPRC rc = TLDAP_NO_MEMORY;
2029         struct tldap_message **msgs;
2030         struct tldap_message *result;
2031
2032         if (tldap_pending_reqs(ld)) {
2033                 return TLDAP_BUSY;
2034         }
2035
2036         frame = talloc_stackframe();
2037
2038         ev = samba_tevent_context_init(frame);
2039         if (ev == NULL) {
2040                 goto fail;
2041         }
2042         req = tldap_search_all_send(frame, ev, ld, base, scope, filter,
2043                                     attrs, num_attrs, attrsonly,
2044                                     sctrls, num_sctrls, cctrls, num_cctrls,
2045                                     timelimit, sizelimit, deref);
2046         if (req == NULL) {
2047                 goto fail;
2048         }
2049         if (!tevent_req_poll(req, ev)) {
2050                 rc = TLDAP_OPERATIONS_ERROR;
2051                 goto fail;
2052         }
2053         rc = tldap_search_all_recv(req, frame, &msgs, &result);
2054         TALLOC_FREE(req);
2055         if (!TLDAP_RC_IS_SUCCESS(rc)) {
2056                 goto fail;
2057         }
2058
2059         TALLOC_FREE(ld->last_msg);
2060         ld->last_msg = talloc_move(ld, &result);
2061
2062         if (pmsgs != NULL) {
2063                 *pmsgs = talloc_move(mem_ctx, &msgs);
2064         }
2065 fail:
2066         TALLOC_FREE(frame);
2067         return rc;
2068 }
2069
2070 static bool tldap_parse_search_entry(struct tldap_message *msg)
2071 {
2072         int num_attribs = 0;
2073
2074         if (msg->type != TLDAP_RES_SEARCH_ENTRY) {
2075                 return false;
2076         }
2077         if (!asn1_start_tag(msg->data, TLDAP_RES_SEARCH_ENTRY)) {
2078                 return false;
2079         }
2080
2081         /* dn */
2082
2083         if (!asn1_read_OctetString_talloc(msg, msg->data, &msg->dn)) return false;
2084
2085         if (msg->dn == NULL) {
2086                 return false;
2087         }
2088
2089         /*
2090          * Attributes: We overallocate msg->attribs by one, so that while
2091          * looping over the attributes we can directly parse into the last
2092          * array element. Same for the values in the inner loop.
2093          */
2094
2095         msg->attribs = talloc_array(msg, struct tldap_attribute, 1);
2096         if (msg->attribs == NULL) {
2097                 return false;
2098         }
2099
2100         if (!asn1_start_tag(msg->data, ASN1_SEQUENCE(0))) return false;
2101         while (asn1_peek_tag(msg->data, ASN1_SEQUENCE(0))) {
2102                 struct tldap_attribute *attrib;
2103                 int num_values = 0;
2104
2105                 attrib = &msg->attribs[num_attribs];
2106                 attrib->values = talloc_array(msg->attribs, DATA_BLOB, 1);
2107                 if (attrib->values == NULL) {
2108                         return false;
2109                 }
2110                 if (!asn1_start_tag(msg->data, ASN1_SEQUENCE(0))) return false;
2111                 if (!asn1_read_OctetString_talloc(msg->attribs, msg->data,
2112                                              &attrib->name)) return false;
2113                 if (!asn1_start_tag(msg->data, ASN1_SET)) return false;
2114
2115                 while (asn1_peek_tag(msg->data, ASN1_OCTET_STRING)) {
2116                         if (!asn1_read_OctetString(msg->data, msg,
2117                                               &attrib->values[num_values])) return false;
2118
2119                         attrib->values = talloc_realloc(
2120                                 msg->attribs, attrib->values, DATA_BLOB,
2121                                 num_values + 2);
2122                         if (attrib->values == NULL) {
2123                                 return false;
2124                         }
2125                         num_values += 1;
2126                 }
2127                 attrib->values = talloc_realloc(msg->attribs, attrib->values,
2128                                                 DATA_BLOB, num_values);
2129                 attrib->num_values = num_values;
2130
2131                 if (!asn1_end_tag(msg->data)) return false; /* ASN1_SET */
2132                 if (!asn1_end_tag(msg->data)) return false; /* ASN1_SEQUENCE(0) */
2133                 msg->attribs = talloc_realloc(
2134                         msg, msg->attribs, struct tldap_attribute,
2135                         num_attribs + 2);
2136                 if (msg->attribs == NULL) {
2137                         return false;
2138                 }
2139                 num_attribs += 1;
2140         }
2141         msg->attribs = talloc_realloc(
2142                 msg, msg->attribs, struct tldap_attribute, num_attribs);
2143         return asn1_end_tag(msg->data);
2144 }
2145
2146 bool tldap_entry_dn(struct tldap_message *msg, char **dn)
2147 {
2148         if ((msg->dn == NULL) && (!tldap_parse_search_entry(msg))) {
2149                 return false;
2150         }
2151         *dn = msg->dn;
2152         return true;
2153 }
2154
2155 bool tldap_entry_attributes(struct tldap_message *msg,
2156                             struct tldap_attribute **attributes,
2157                             int *num_attributes)
2158 {
2159         if ((msg->dn == NULL) && (!tldap_parse_search_entry(msg))) {
2160                 return false;
2161         }
2162         *attributes = msg->attribs;
2163         *num_attributes = talloc_array_length(msg->attribs);
2164         return true;
2165 }
2166
2167 static bool tldap_decode_controls(struct tldap_req_state *state)
2168 {
2169         struct tldap_message *msg = state->result;
2170         struct asn1_data *data = msg->data;
2171         struct tldap_control *sctrls = NULL;
2172         int num_controls = 0;
2173         bool ret = false;
2174
2175         msg->res_sctrls = NULL;
2176
2177         if (!asn1_peek_tag(data, ASN1_CONTEXT(0))) {
2178                 return true;
2179         }
2180
2181         if (!asn1_start_tag(data, ASN1_CONTEXT(0))) goto out;
2182
2183         while (asn1_peek_tag(data, ASN1_SEQUENCE(0))) {
2184                 struct tldap_control *c;
2185                 char *oid = NULL;
2186
2187                 sctrls = talloc_realloc(msg, sctrls, struct tldap_control,
2188                                         num_controls + 1);
2189                 if (sctrls == NULL) {
2190                         goto out;
2191                 }
2192                 c = &sctrls[num_controls];
2193
2194                 if (!asn1_start_tag(data, ASN1_SEQUENCE(0))) goto out;
2195                 if (!asn1_read_OctetString_talloc(msg, data, &oid)) goto out;
2196                 if (asn1_has_error(data) || (oid == NULL)) {
2197                         goto out;
2198                 }
2199                 c->oid = oid;
2200                 if (asn1_peek_tag(data, ASN1_BOOLEAN)) {
2201                         if (!asn1_read_BOOLEAN(data, &c->critical)) goto out;
2202                 } else {
2203                         c->critical = false;
2204                 }
2205                 c->value = data_blob_null;
2206                 if (asn1_peek_tag(data, ASN1_OCTET_STRING) &&
2207                     !asn1_read_OctetString(data, msg, &c->value)) {
2208                         goto out;
2209                 }
2210                 if (!asn1_end_tag(data)) goto out; /* ASN1_SEQUENCE(0) */
2211
2212                 num_controls += 1;
2213         }
2214
2215         if (!asn1_end_tag(data)) goto out;      /* ASN1_CONTEXT(0) */
2216
2217         ret = true;
2218
2219  out:
2220
2221         if (ret) {
2222                 msg->res_sctrls = sctrls;
2223         } else {
2224                 TALLOC_FREE(sctrls);
2225         }
2226         return ret;
2227 }
2228
2229 static void tldap_simple_done(struct tevent_req *subreq, int type)
2230 {
2231         struct tevent_req *req = tevent_req_callback_data(
2232                 subreq, struct tevent_req);
2233         struct tldap_req_state *state = tevent_req_data(
2234                 req, struct tldap_req_state);
2235         TLDAPRC rc;
2236
2237         rc = tldap_msg_recv(subreq, state, &state->result);
2238         TALLOC_FREE(subreq);
2239         if (tevent_req_ldap_error(req, rc)) {
2240                 return;
2241         }
2242         if (state->result->type != type) {
2243                 tevent_req_ldap_error(req, TLDAP_PROTOCOL_ERROR);
2244                 return;
2245         }
2246         if (!asn1_start_tag(state->result->data, state->result->type) ||
2247             !tldap_decode_response(state) ||
2248             !asn1_end_tag(state->result->data) ||
2249             !tldap_decode_controls(state)) {
2250                 tevent_req_ldap_error(req, TLDAP_DECODING_ERROR);
2251                 return;
2252         }
2253         if (!TLDAP_RC_IS_SUCCESS(state->result->lderr)) {
2254                 tevent_req_ldap_error(req, state->result->lderr);
2255                 return;
2256         }
2257         tevent_req_done(req);
2258 }
2259
2260 static TLDAPRC tldap_simple_recv(struct tevent_req *req)
2261 {
2262         TLDAPRC rc;
2263         if (tevent_req_is_ldap_error(req, &rc)) {
2264                 return rc;
2265         }
2266         return TLDAP_SUCCESS;
2267 }
2268
2269 static void tldap_add_done(struct tevent_req *subreq);
2270
2271 struct tevent_req *tldap_add_send(TALLOC_CTX *mem_ctx,
2272                                   struct tevent_context *ev,
2273                                   struct tldap_context *ld,
2274                                   const char *dn,
2275                                   struct tldap_mod *attributes,
2276                                   int num_attributes,
2277                                   struct tldap_control *sctrls,
2278                                   int num_sctrls,
2279                                   struct tldap_control *cctrls,
2280                                   int num_cctrls)
2281 {
2282         struct tevent_req *req, *subreq;
2283         struct tldap_req_state *state;
2284         int i, j;
2285
2286         req = tldap_req_create(mem_ctx, ld, &state);
2287         if (req == NULL) {
2288                 return NULL;
2289         }
2290
2291         if (!asn1_push_tag(state->out, TLDAP_REQ_ADD)) goto err;
2292         if (!asn1_write_OctetString(state->out, dn, strlen(dn))) goto err;
2293         if (!asn1_push_tag(state->out, ASN1_SEQUENCE(0))) goto err;
2294
2295         for (i=0; i<num_attributes; i++) {
2296                 struct tldap_mod *attrib = &attributes[i];
2297                 if (!asn1_push_tag(state->out, ASN1_SEQUENCE(0))) goto err;
2298                 if (!asn1_write_OctetString(state->out, attrib->attribute,
2299                                        strlen(attrib->attribute))) goto err;
2300                 if (!asn1_push_tag(state->out, ASN1_SET)) goto err;
2301                 for (j=0; j<attrib->num_values; j++) {
2302                         if (!asn1_write_OctetString(state->out,
2303                                                attrib->values[j].data,
2304                                                attrib->values[j].length)) goto err;
2305                 }
2306                 if (!asn1_pop_tag(state->out)) goto err;
2307                 if (!asn1_pop_tag(state->out)) goto err;
2308         }
2309
2310         if (!asn1_pop_tag(state->out)) goto err;
2311         if (!asn1_pop_tag(state->out)) goto err;
2312
2313         subreq = tldap_msg_send(state, ev, ld, state->id, state->out,
2314                                 sctrls, num_sctrls);
2315         if (tevent_req_nomem(subreq, req)) {
2316                 return tevent_req_post(req, ev);
2317         }
2318         tevent_req_set_callback(subreq, tldap_add_done, req);
2319         return req;
2320
2321   err:
2322
2323         tevent_req_ldap_error(req, TLDAP_ENCODING_ERROR);
2324         return tevent_req_post(req, ev);
2325 }
2326
2327 static void tldap_add_done(struct tevent_req *subreq)
2328 {
2329         tldap_simple_done(subreq, TLDAP_RES_ADD);
2330 }
2331
2332 TLDAPRC tldap_add_recv(struct tevent_req *req)
2333 {
2334         return tldap_simple_recv(req);
2335 }
2336
2337 TLDAPRC tldap_add(struct tldap_context *ld, const char *dn,
2338                   struct tldap_mod *attributes, int num_attributes,
2339                   struct tldap_control *sctrls, int num_sctrls,
2340                   struct tldap_control *cctrls, int num_cctrls)
2341 {
2342         TALLOC_CTX *frame = talloc_stackframe();
2343         struct tevent_context *ev;
2344         struct tevent_req *req;
2345         TLDAPRC rc = TLDAP_NO_MEMORY;
2346
2347         ev = samba_tevent_context_init(frame);
2348         if (ev == NULL) {
2349                 goto fail;
2350         }
2351         req = tldap_add_send(frame, ev, ld, dn, attributes, num_attributes,
2352                              sctrls, num_sctrls, cctrls, num_cctrls);
2353         if (req == NULL) {
2354                 goto fail;
2355         }
2356         if (!tevent_req_poll(req, ev)) {
2357                 rc = TLDAP_OPERATIONS_ERROR;
2358                 goto fail;
2359         }
2360         rc = tldap_add_recv(req);
2361         tldap_save_msg(ld, req);
2362  fail:
2363         TALLOC_FREE(frame);
2364         return rc;
2365 }
2366
2367 static void tldap_modify_done(struct tevent_req *subreq);
2368
2369 struct tevent_req *tldap_modify_send(TALLOC_CTX *mem_ctx,
2370                                      struct tevent_context *ev,
2371                                      struct tldap_context *ld,
2372                                      const char *dn,
2373                                      struct tldap_mod *mods, int num_mods,
2374                                      struct tldap_control *sctrls,
2375                                      int num_sctrls,
2376                                      struct tldap_control *cctrls,
2377                                      int num_cctrls)
2378 {
2379         struct tevent_req *req, *subreq;
2380         struct tldap_req_state *state;
2381         int i, j;
2382
2383         req = tldap_req_create(mem_ctx, ld, &state);
2384         if (req == NULL) {
2385                 return NULL;
2386         }
2387
2388         if (!asn1_push_tag(state->out, TLDAP_REQ_MODIFY)) goto err;
2389         if (!asn1_write_OctetString(state->out, dn, strlen(dn))) goto err;
2390         if (!asn1_push_tag(state->out, ASN1_SEQUENCE(0))) goto err;
2391
2392         for (i=0; i<num_mods; i++) {
2393                 struct tldap_mod *mod = &mods[i];
2394                 if (!asn1_push_tag(state->out, ASN1_SEQUENCE(0))) goto err;
2395                 if (!asn1_write_enumerated(state->out, mod->mod_op)) goto err;
2396                 if (!asn1_push_tag(state->out, ASN1_SEQUENCE(0))) goto err;
2397                 if (!asn1_write_OctetString(state->out, mod->attribute,
2398                                        strlen(mod->attribute))) goto err;
2399                 if (!asn1_push_tag(state->out, ASN1_SET)) goto err;
2400                 for (j=0; j<mod->num_values; j++) {
2401                         if (!asn1_write_OctetString(state->out,
2402                                                mod->values[j].data,
2403                                                mod->values[j].length)) goto err;
2404                 }
2405                 if (!asn1_pop_tag(state->out)) goto err;
2406                 if (!asn1_pop_tag(state->out)) goto err;
2407                 if (!asn1_pop_tag(state->out)) goto err;
2408         }
2409
2410         if (!asn1_pop_tag(state->out)) goto err;
2411         if (!asn1_pop_tag(state->out)) goto err;
2412
2413         subreq = tldap_msg_send(state, ev, ld, state->id, state->out,
2414                                 sctrls, num_sctrls);
2415         if (tevent_req_nomem(subreq, req)) {
2416                 return tevent_req_post(req, ev);
2417         }
2418         tevent_req_set_callback(subreq, tldap_modify_done, req);
2419         return req;
2420
2421   err:
2422
2423         tevent_req_ldap_error(req, TLDAP_ENCODING_ERROR);
2424         return tevent_req_post(req, ev);
2425 }
2426
2427 static void tldap_modify_done(struct tevent_req *subreq)
2428 {
2429         tldap_simple_done(subreq, TLDAP_RES_MODIFY);
2430 }
2431
2432 TLDAPRC tldap_modify_recv(struct tevent_req *req)
2433 {
2434         return tldap_simple_recv(req);
2435 }
2436
2437 TLDAPRC tldap_modify(struct tldap_context *ld, const char *dn,
2438                      struct tldap_mod *mods, int num_mods,
2439                      struct tldap_control *sctrls, int num_sctrls,
2440                      struct tldap_control *cctrls, int num_cctrls)
2441  {
2442         TALLOC_CTX *frame = talloc_stackframe();
2443         struct tevent_context *ev;
2444         struct tevent_req *req;
2445         TLDAPRC rc = TLDAP_NO_MEMORY;
2446
2447         ev = samba_tevent_context_init(frame);
2448         if (ev == NULL) {
2449                 goto fail;
2450         }
2451         req = tldap_modify_send(frame, ev, ld, dn, mods, num_mods,
2452                                 sctrls, num_sctrls, cctrls, num_cctrls);
2453         if (req == NULL) {
2454                 goto fail;
2455         }
2456         if (!tevent_req_poll(req, ev)) {
2457                 rc = TLDAP_OPERATIONS_ERROR;
2458                 goto fail;
2459         }
2460         rc = tldap_modify_recv(req);
2461         tldap_save_msg(ld, req);
2462  fail:
2463         TALLOC_FREE(frame);
2464         return rc;
2465 }
2466
2467 static void tldap_delete_done(struct tevent_req *subreq);
2468
2469 struct tevent_req *tldap_delete_send(TALLOC_CTX *mem_ctx,
2470                                      struct tevent_context *ev,
2471                                      struct tldap_context *ld,
2472                                      const char *dn,
2473                                      struct tldap_control *sctrls,
2474                                      int num_sctrls,
2475                                      struct tldap_control *cctrls,
2476                                      int num_cctrls)
2477 {
2478         struct tevent_req *req, *subreq;
2479         struct tldap_req_state *state;
2480
2481         req = tldap_req_create(mem_ctx, ld, &state);
2482         if (req == NULL) {
2483                 return NULL;
2484         }
2485
2486         if (!asn1_push_tag(state->out, TLDAP_REQ_DELETE)) goto err;
2487         if (!asn1_write(state->out, dn, strlen(dn))) goto err;
2488         if (!asn1_pop_tag(state->out)) goto err;
2489
2490         subreq = tldap_msg_send(state, ev, ld, state->id, state->out,
2491                                 sctrls, num_sctrls);
2492         if (tevent_req_nomem(subreq, req)) {
2493                 return tevent_req_post(req, ev);
2494         }
2495         tevent_req_set_callback(subreq, tldap_delete_done, req);
2496         return req;
2497
2498   err:
2499
2500         tevent_req_ldap_error(req, TLDAP_ENCODING_ERROR);
2501         return tevent_req_post(req, ev);
2502 }
2503
2504 static void tldap_delete_done(struct tevent_req *subreq)
2505 {
2506         tldap_simple_done(subreq, TLDAP_RES_DELETE);
2507 }
2508
2509 TLDAPRC tldap_delete_recv(struct tevent_req *req)
2510 {
2511         return tldap_simple_recv(req);
2512 }
2513
2514 TLDAPRC tldap_delete(struct tldap_context *ld, const char *dn,
2515                      struct tldap_control *sctrls, int num_sctrls,
2516                      struct tldap_control *cctrls, int num_cctrls)
2517 {
2518         TALLOC_CTX *frame = talloc_stackframe();
2519         struct tevent_context *ev;
2520         struct tevent_req *req;
2521         TLDAPRC rc = TLDAP_NO_MEMORY;
2522
2523         ev = samba_tevent_context_init(frame);
2524         if (ev == NULL) {
2525                 goto fail;
2526         }
2527         req = tldap_delete_send(frame, ev, ld, dn, sctrls, num_sctrls,
2528                                 cctrls, num_cctrls);
2529         if (req == NULL) {
2530                 goto fail;
2531         }
2532         if (!tevent_req_poll(req, ev)) {
2533                 rc = TLDAP_OPERATIONS_ERROR;
2534                 goto fail;
2535         }
2536         rc = tldap_delete_recv(req);
2537         tldap_save_msg(ld, req);
2538  fail:
2539         TALLOC_FREE(frame);
2540         return rc;
2541 }
2542
2543 int tldap_msg_id(const struct tldap_message *msg)
2544 {
2545         return msg->id;
2546 }
2547
2548 int tldap_msg_type(const struct tldap_message *msg)
2549 {
2550         return msg->type;
2551 }
2552
2553 const char *tldap_msg_matcheddn(struct tldap_message *msg)
2554 {
2555         if (msg == NULL) {
2556                 return NULL;
2557         }
2558         return msg->res_matcheddn;
2559 }
2560
2561 const char *tldap_msg_diagnosticmessage(struct tldap_message *msg)
2562 {
2563         if (msg == NULL) {
2564                 return NULL;
2565         }
2566         return msg->res_diagnosticmessage;
2567 }
2568
2569 const char *tldap_msg_referral(struct tldap_message *msg)
2570 {
2571         if (msg == NULL) {
2572                 return NULL;
2573         }
2574         return msg->res_referral;
2575 }
2576
2577 void tldap_msg_sctrls(struct tldap_message *msg, int *num_sctrls,
2578                       struct tldap_control **sctrls)
2579 {
2580         if (msg == NULL) {
2581                 *sctrls = NULL;
2582                 *num_sctrls = 0;
2583                 return;
2584         }
2585         *sctrls = msg->res_sctrls;
2586         *num_sctrls = talloc_array_length(msg->res_sctrls);
2587 }
2588
2589 struct tldap_message *tldap_ctx_lastmsg(struct tldap_context *ld)
2590 {
2591         return ld->last_msg;
2592 }
2593
2594 static const struct { TLDAPRC rc; const char *string; } tldaprc_errmap[] =
2595 {
2596         { TLDAP_SUCCESS,
2597           "TLDAP_SUCCESS" },
2598         { TLDAP_OPERATIONS_ERROR,
2599           "TLDAP_OPERATIONS_ERROR" },
2600         { TLDAP_PROTOCOL_ERROR,
2601           "TLDAP_PROTOCOL_ERROR" },
2602         { TLDAP_TIMELIMIT_EXCEEDED,
2603           "TLDAP_TIMELIMIT_EXCEEDED" },
2604         { TLDAP_SIZELIMIT_EXCEEDED,
2605           "TLDAP_SIZELIMIT_EXCEEDED" },
2606         { TLDAP_COMPARE_FALSE,
2607           "TLDAP_COMPARE_FALSE" },
2608         { TLDAP_COMPARE_TRUE,
2609           "TLDAP_COMPARE_TRUE" },
2610         { TLDAP_STRONG_AUTH_NOT_SUPPORTED,
2611           "TLDAP_STRONG_AUTH_NOT_SUPPORTED" },
2612         { TLDAP_STRONG_AUTH_REQUIRED,
2613           "TLDAP_STRONG_AUTH_REQUIRED" },
2614         { TLDAP_REFERRAL,
2615           "TLDAP_REFERRAL" },
2616         { TLDAP_ADMINLIMIT_EXCEEDED,
2617           "TLDAP_ADMINLIMIT_EXCEEDED" },
2618         { TLDAP_UNAVAILABLE_CRITICAL_EXTENSION,
2619           "TLDAP_UNAVAILABLE_CRITICAL_EXTENSION" },
2620         { TLDAP_CONFIDENTIALITY_REQUIRED,
2621           "TLDAP_CONFIDENTIALITY_REQUIRED" },
2622         { TLDAP_SASL_BIND_IN_PROGRESS,
2623           "TLDAP_SASL_BIND_IN_PROGRESS" },
2624         { TLDAP_NO_SUCH_ATTRIBUTE,
2625           "TLDAP_NO_SUCH_ATTRIBUTE" },
2626         { TLDAP_UNDEFINED_TYPE,
2627           "TLDAP_UNDEFINED_TYPE" },
2628         { TLDAP_INAPPROPRIATE_MATCHING,
2629           "TLDAP_INAPPROPRIATE_MATCHING" },
2630         { TLDAP_CONSTRAINT_VIOLATION,
2631           "TLDAP_CONSTRAINT_VIOLATION" },
2632         { TLDAP_TYPE_OR_VALUE_EXISTS,
2633           "TLDAP_TYPE_OR_VALUE_EXISTS" },
2634         { TLDAP_INVALID_SYNTAX,
2635           "TLDAP_INVALID_SYNTAX" },
2636         { TLDAP_NO_SUCH_OBJECT,
2637           "TLDAP_NO_SUCH_OBJECT" },
2638         { TLDAP_ALIAS_PROBLEM,
2639           "TLDAP_ALIAS_PROBLEM" },
2640         { TLDAP_INVALID_DN_SYNTAX,
2641           "TLDAP_INVALID_DN_SYNTAX" },
2642         { TLDAP_IS_LEAF,
2643           "TLDAP_IS_LEAF" },
2644         { TLDAP_ALIAS_DEREF_PROBLEM,
2645           "TLDAP_ALIAS_DEREF_PROBLEM" },
2646         { TLDAP_INAPPROPRIATE_AUTH,
2647           "TLDAP_INAPPROPRIATE_AUTH" },
2648         { TLDAP_INVALID_CREDENTIALS,
2649           "TLDAP_INVALID_CREDENTIALS" },
2650         { TLDAP_INSUFFICIENT_ACCESS,
2651           "TLDAP_INSUFFICIENT_ACCESS" },
2652         { TLDAP_BUSY,
2653           "TLDAP_BUSY" },
2654         { TLDAP_UNAVAILABLE,
2655           "TLDAP_UNAVAILABLE" },
2656         { TLDAP_UNWILLING_TO_PERFORM,
2657           "TLDAP_UNWILLING_TO_PERFORM" },
2658         { TLDAP_LOOP_DETECT,
2659           "TLDAP_LOOP_DETECT" },
2660         { TLDAP_NAMING_VIOLATION,
2661           "TLDAP_NAMING_VIOLATION" },
2662         { TLDAP_OBJECT_CLASS_VIOLATION,
2663           "TLDAP_OBJECT_CLASS_VIOLATION" },
2664         { TLDAP_NOT_ALLOWED_ON_NONLEAF,
2665           "TLDAP_NOT_ALLOWED_ON_NONLEAF" },
2666         { TLDAP_NOT_ALLOWED_ON_RDN,
2667           "TLDAP_NOT_ALLOWED_ON_RDN" },
2668         { TLDAP_ALREADY_EXISTS,
2669           "TLDAP_ALREADY_EXISTS" },
2670         { TLDAP_NO_OBJECT_CLASS_MODS,
2671           "TLDAP_NO_OBJECT_CLASS_MODS" },
2672         { TLDAP_RESULTS_TOO_LARGE,
2673           "TLDAP_RESULTS_TOO_LARGE" },
2674         { TLDAP_AFFECTS_MULTIPLE_DSAS,
2675           "TLDAP_AFFECTS_MULTIPLE_DSAS" },
2676         { TLDAP_OTHER,
2677           "TLDAP_OTHER" },
2678         { TLDAP_SERVER_DOWN,
2679           "TLDAP_SERVER_DOWN" },
2680         { TLDAP_LOCAL_ERROR,
2681           "TLDAP_LOCAL_ERROR" },
2682         { TLDAP_ENCODING_ERROR,
2683           "TLDAP_ENCODING_ERROR" },
2684         { TLDAP_DECODING_ERROR,
2685           "TLDAP_DECODING_ERROR" },
2686         { TLDAP_TIMEOUT,
2687           "TLDAP_TIMEOUT" },
2688         { TLDAP_AUTH_UNKNOWN,
2689           "TLDAP_AUTH_UNKNOWN" },
2690         { TLDAP_FILTER_ERROR,
2691           "TLDAP_FILTER_ERROR" },
2692         { TLDAP_USER_CANCELLED,
2693           "TLDAP_USER_CANCELLED" },
2694         { TLDAP_PARAM_ERROR,
2695           "TLDAP_PARAM_ERROR" },
2696         { TLDAP_NO_MEMORY,
2697           "TLDAP_NO_MEMORY" },
2698         { TLDAP_CONNECT_ERROR,
2699           "TLDAP_CONNECT_ERROR" },
2700         { TLDAP_NOT_SUPPORTED,
2701           "TLDAP_NOT_SUPPORTED" },
2702         { TLDAP_CONTROL_NOT_FOUND,
2703           "TLDAP_CONTROL_NOT_FOUND" },
2704         { TLDAP_NO_RESULTS_RETURNED,
2705           "TLDAP_NO_RESULTS_RETURNED" },
2706         { TLDAP_MORE_RESULTS_TO_RETURN,
2707           "TLDAP_MORE_RESULTS_TO_RETURN" },
2708         { TLDAP_CLIENT_LOOP,
2709           "TLDAP_CLIENT_LOOP" },
2710         { TLDAP_REFERRAL_LIMIT_EXCEEDED,
2711           "TLDAP_REFERRAL_LIMIT_EXCEEDED" },
2712 };
2713
2714 const char *tldap_rc2string(TLDAPRC rc)
2715 {
2716         size_t i;
2717
2718         for (i=0; i<ARRAY_SIZE(tldaprc_errmap); i++) {
2719                 if (TLDAP_RC_EQUAL(rc, tldaprc_errmap[i].rc)) {
2720                         return tldaprc_errmap[i].string;
2721                 }
2722         }
2723
2724         return "Unknown LDAP Error";
2725 }