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 == 2147483647) {
 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         int i, err;
 670         TLDAPRC status = TLDAP_PROTOCOL_ERROR;
 671         int id;
 672         uint8_t type;
 673         bool ok;
 674
 675         received = read_ldap_recv(subreq, talloc_tos(), &inbuf, &err);
 676         TALLOC_FREE(subreq);
 677         ld->read_req = NULL;
 678         if (received == -1) {
 679                 status = TLDAP_SERVER_DOWN;
 680                 goto fail;
 681         }
 682
 683         data = asn1_init(talloc_tos(), ASN1_MAX_TREE_DEPTH);
 684         if (data == NULL) {
 685                 /*
 686                  * We have to disconnect all, we can't tell which of
 687                  * the requests this reply is for.
 688                  */
 689                 status = TLDAP_NO_MEMORY;
 690                 goto fail;
 691         }
 692         asn1_load_nocopy(data, inbuf, received);
 693
 694         ok = true;
 695         ok &= asn1_start_tag(data, ASN1_SEQUENCE(0));
 696         ok &= asn1_read_Integer(data, &id);
 697         ok &= asn1_peek_uint8(data, &type);
 698
 699         if (!ok) {
 700                 status = TLDAP_PROTOCOL_ERROR;
 701                 goto fail;
 702         }
 703
 704         tldap_debug(ld, TLDAP_DEBUG_TRACE, "tldap_msg_received: got msg %d "
 705                     "type %d\n", id, (int)type);
 706
 707         if (id == 0) {
 708                 tldap_debug(
 709                         ld,
 710                         TLDAP_DEBUG_WARNING,
 711                         "tldap_msg_received: got msgid 0 of "
 712                         "type %"PRIu8", disconnecting\n",
 713                         type);
 714                 tldap_context_disconnect(ld, TLDAP_SERVER_DOWN);
 715                 return;
 716         }
 717
 718         num_pending = talloc_array_length(ld->pending);
 719
 720         for (i=0; i<num_pending; i++) {
 721                 if (id == tldap_msg_msgid(ld->pending[i])) {
 722                         break;
 723                 }
 724         }
 725         if (i == num_pending) {
 726                 /* Dump unexpected reply */
 727                 tldap_debug(ld, TLDAP_DEBUG_WARNING, "tldap_msg_received: "
 728                             "No request pending for msg %d\n", id);
 729                 TALLOC_FREE(data);
 730                 TALLOC_FREE(inbuf);
 731                 goto done;
 732         }
 733
 734         req = ld->pending[i];
 735         state = tevent_req_data(req, struct tldap_msg_state);
 736
 737         state->inbuf = talloc_move(state, &inbuf);
 738         state->data = talloc_move(state, &data);
 739
 740         tldap_msg_unset_pending(req);
 741         num_pending = talloc_array_length(ld->pending);
 742
 743         tevent_req_defer_callback(req, state->ev);
 744         tevent_req_done(req);
 745
 746  done:
 747         if (num_pending == 0) {
 748                 return;
 749         }
 750
 751         state = tevent_req_data(ld->pending[0], struct tldap_msg_state);
 752         ld->read_req = read_ldap_send(ld->pending, state->ev, ld->conn);
 753         if (ld->read_req == NULL) {
 754                 status = TLDAP_NO_MEMORY;
 755                 goto fail;
 756         }
 757         tevent_req_set_callback(ld->read_req, tldap_msg_received, ld);
 758         return;
 759
 760  fail:
 761         tldap_context_disconnect(ld, status);
 762 }
 763
 764 static TLDAPRC tldap_msg_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
 765                               struct tldap_message **pmsg)
 766 {
 767         struct tldap_msg_state *state = tevent_req_data(
 768                 req, struct tldap_msg_state);
 769         struct tldap_message *msg;
 770         TLDAPRC err;
 771         uint8_t msgtype;
 772
 773         if (tevent_req_is_ldap_error(req, &err)) {
 774                 return err;
 775         }
 776
 777         if (!asn1_peek_uint8(state->data, &msgtype)) {
 778                 return TLDAP_PROTOCOL_ERROR;
 779         }
 780
 781         if (pmsg == NULL) {
 782                 return TLDAP_SUCCESS;
 783         }
 784
 785         msg = talloc_zero(mem_ctx, struct tldap_message);
 786         if (msg == NULL) {
 787                 return TLDAP_NO_MEMORY;
 788         }
 789         msg->id = state->id;
 790
 791         msg->inbuf = talloc_move(msg, &state->inbuf);
 792         msg->data = talloc_move(msg, &state->data);
 793         msg->type = msgtype;
 794
 795         *pmsg = msg;
 796         return TLDAP_SUCCESS;
 797 }
 798
 799 struct tldap_req_state {
 800         int id;
 801         struct asn1_data *out;
 802         struct tldap_message *result;
 803 };
 804
 805 static struct tevent_req *tldap_req_create(TALLOC_CTX *mem_ctx,
 806                                            struct tldap_context *ld,
 807                                            struct tldap_req_state **pstate)
 808 {
 809         struct tevent_req *req;
 810         struct tldap_req_state *state;
 811
 812         req = tevent_req_create(mem_ctx, &state, struct tldap_req_state);
 813         if (req == NULL) {
 814                 return NULL;
 815         }
 816         state->out = asn1_init(state, ASN1_MAX_TREE_DEPTH);
 817         if (state->out == NULL) {
 818                 goto err;
 819         }
 820         state->id = tldap_next_msgid(ld);
 821
 822         if (!asn1_push_tag(state->out, ASN1_SEQUENCE(0))) goto err;
 823         if (!asn1_write_Integer(state->out, state->id)) goto err;
 824
 825         *pstate = state;
 826         return req;
 827
 828   err:
 829
 830         TALLOC_FREE(req);
 831         return NULL;
 832 }
 833
 834 static void tldap_save_msg(struct tldap_context *ld, struct tevent_req *req)
 835 {
 836         struct tldap_req_state *state = tevent_req_data(
 837                 req, struct tldap_req_state);
 838
 839         TALLOC_FREE(ld->last_msg);
 840         ld->last_msg = talloc_move(ld, &state->result);
 841 }
 842
 843 static char *blob2string_talloc(TALLOC_CTX *mem_ctx, DATA_BLOB blob)
 844 {
 845         char *result = talloc_array(mem_ctx, char, blob.length+1);
 846
 847         if (result == NULL) {
 848                 return NULL;
 849         }
 850
 851         memcpy(result, blob.data, blob.length);
 852         result[blob.length] = '\0';
 853         return result;
 854 }
 855
 856 static bool asn1_read_OctetString_talloc(TALLOC_CTX *mem_ctx,
 857                                          struct asn1_data *data,
 858                                          char **presult)
 859 {
 860         DATA_BLOB string;
 861         char *result;
 862         if (!asn1_read_OctetString(data, mem_ctx, &string))
 863                 return false;
 864
 865         result = blob2string_talloc(mem_ctx, string);
 866
 867         data_blob_free(&string);
 868
 869         if (result == NULL) {
 870                 return false;
 871         }
 872         *presult = result;
 873         return true;
 874 }
 875
 876 static bool tldap_decode_controls(struct tldap_req_state *state);
 877
 878 static bool tldap_decode_response(struct tldap_req_state *state)
 879 {
 880         struct asn1_data *data = state->result->data;
 881         struct tldap_message *msg = state->result;
 882         int rc;
 883         bool ok = true;
 884
 885         ok &= asn1_read_enumerated(data, &rc);
 886         if (ok) {
 887                 msg->lderr = TLDAP_RC(rc);
 888         }
 889
 890         ok &= asn1_read_OctetString_talloc(msg, data, &msg->res_matcheddn);
 891         ok &= asn1_read_OctetString_talloc(msg, data,
 892                                            &msg->res_diagnosticmessage);
 893         if (!ok) return ok;
 894         if (asn1_peek_tag(data, ASN1_CONTEXT(3))) {
 895                 ok &= asn1_start_tag(data, ASN1_CONTEXT(3));
 896                 ok &= asn1_read_OctetString_talloc(msg, data,
 897                                                    &msg->res_referral);
 898                 ok &= asn1_end_tag(data);
 899         } else {
 900                 msg->res_referral = NULL;
 901         }
 902
 903         return ok;
 904 }
 905
 906 static void tldap_sasl_bind_done(struct tevent_req *subreq);
 907
 908 struct tevent_req *tldap_sasl_bind_send(TALLOC_CTX *mem_ctx,
 909                                         struct tevent_context *ev,
 910                                         struct tldap_context *ld,
 911                                         const char *dn,
 912                                         const char *mechanism,
 913                                         DATA_BLOB *creds,
 914                                         struct tldap_control *sctrls,
 915                                         int num_sctrls,
 916                                         struct tldap_control *cctrls,
 917                                         int num_cctrls)
 918 {
 919         struct tevent_req *req, *subreq;
 920         struct tldap_req_state *state;
 921
 922         req = tldap_req_create(mem_ctx, ld, &state);
 923         if (req == NULL) {
 924                 return NULL;
 925         }
 926
 927         if (dn == NULL) {
 928                 dn = "";
 929         }
 930
 931         if (!asn1_push_tag(state->out, TLDAP_REQ_BIND)) goto err;
 932         if (!asn1_write_Integer(state->out, ld->ld_version)) goto err;
 933         if (!asn1_write_OctetString(state->out, dn, strlen(dn))) goto err;
 934
 935         if (mechanism == NULL) {
 936                 if (!asn1_push_tag(state->out, ASN1_CONTEXT_SIMPLE(0))) goto err;
 937                 if (!asn1_write(state->out, creds->data, creds->length)) goto err;
 938                 if (!asn1_pop_tag(state->out)) goto err;
 939         } else {
 940                 if (!asn1_push_tag(state->out, ASN1_CONTEXT(3))) goto err;
 941                 if (!asn1_write_OctetString(state->out, mechanism,
 942                                        strlen(mechanism))) goto err;
 943                 if ((creds != NULL) && (creds->data != NULL)) {
 944                         if (!asn1_write_OctetString(state->out, creds->data,
 945                                                creds->length)) goto err;
 946                 }
 947                 if (!asn1_pop_tag(state->out)) goto err;
 948         }
 949
 950         if (!asn1_pop_tag(state->out)) goto err;
 951
 952         subreq = tldap_msg_send(state, ev, ld, state->id, state->out,
 953                                 sctrls, num_sctrls);
 954         if (tevent_req_nomem(subreq, req)) {
 955                 return tevent_req_post(req, ev);
 956         }
 957         tevent_req_set_callback(subreq, tldap_sasl_bind_done, req);
 958         return req;
 959
 960   err:
 961
 962         tevent_req_ldap_error(req, TLDAP_ENCODING_ERROR);
 963         return tevent_req_post(req, ev);
 964 }
 965
 966 static void tldap_sasl_bind_done(struct tevent_req *subreq)
 967 {
 968         struct tevent_req *req = tevent_req_callback_data(
 969                 subreq, struct tevent_req);
 970         struct tldap_req_state *state = tevent_req_data(
 971                 req, struct tldap_req_state);
 972         TLDAPRC rc;
 973         bool ok;
 974
 975         rc = tldap_msg_recv(subreq, state, &state->result);
 976         TALLOC_FREE(subreq);
 977         if (tevent_req_ldap_error(req, rc)) {
 978                 return;
 979         }
 980         if (state->result->type != TLDAP_RES_BIND) {
 981                 tevent_req_ldap_error(req, TLDAP_PROTOCOL_ERROR);
 982                 return;
 983         }
 984
 985         ok = asn1_start_tag(state->result->data, TLDAP_RES_BIND);
 986         ok &= tldap_decode_response(state);
 987
 988         if (asn1_peek_tag(state->result->data, ASN1_CONTEXT_SIMPLE(7))) {
 989                 int len;
 990
 991                 ok &= asn1_start_tag(state->result->data,
 992                                      ASN1_CONTEXT_SIMPLE(7));
 993                 if (!ok) {
 994                         goto decode_error;
 995                 }
 996
 997                 len = asn1_tag_remaining(state->result->data);
 998                 if (len == -1) {
 999                         goto decode_error;
1000                 }
1001
1002                 state->result->res_serverSaslCreds =
1003                         data_blob_talloc(state->result, NULL, len);
1004                 if (state->result->res_serverSaslCreds.data == NULL) {
1005                         goto decode_error;
1006                 }
1007
1008                 ok = asn1_read(state->result->data,
1009                                state->result->res_serverSaslCreds.data,
1010                                state->result->res_serverSaslCreds.length);
1011
1012                 ok &= asn1_end_tag(state->result->data);
1013         }
1014
1015         ok &= asn1_end_tag(state->result->data);
1016
1017         if (!ok) {
1018                 goto decode_error;
1019         }
1020
1021         if (!TLDAP_RC_IS_SUCCESS(state->result->lderr) &&
1022             !TLDAP_RC_EQUAL(state->result->lderr,
1023                             TLDAP_SASL_BIND_IN_PROGRESS)) {
1024                 tevent_req_ldap_error(req, state->result->lderr);
1025                 return;
1026         }
1027         tevent_req_done(req);
1028         return;
1029
1030 decode_error:
1031         tevent_req_ldap_error(req, TLDAP_DECODING_ERROR);
1032         return;
1033 }
1034
1035 TLDAPRC tldap_sasl_bind_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
1036                              DATA_BLOB *serverSaslCreds)
1037 {
1038         struct tldap_req_state *state = tevent_req_data(
1039                 req, struct tldap_req_state);
1040         TLDAPRC rc;
1041
1042         if (tevent_req_is_ldap_error(req, &rc)) {
1043                 return rc;
1044         }
1045
1046         if (serverSaslCreds != NULL) {
1047                 serverSaslCreds->data = talloc_move(
1048                         mem_ctx, &state->result->res_serverSaslCreds.data);
1049                 serverSaslCreds->length =
1050                         state->result->res_serverSaslCreds.length;
1051         }
1052
1053         return state->result->lderr;
1054 }
1055
1056 TLDAPRC tldap_sasl_bind(struct tldap_context *ld,
1057                         const char *dn,
1058                         const char *mechanism,
1059                         DATA_BLOB *creds,
1060                         struct tldap_control *sctrls,
1061                         int num_sctrls,
1062                         struct tldap_control *cctrls,
1063                         int num_cctrls,
1064                         TALLOC_CTX *mem_ctx,
1065                         DATA_BLOB *serverSaslCreds)
1066 {
1067         TALLOC_CTX *frame = talloc_stackframe();
1068         struct tevent_context *ev;
1069         struct tevent_req *req;
1070         TLDAPRC rc = TLDAP_NO_MEMORY;
1071
1072         ev = samba_tevent_context_init(frame);
1073         if (ev == NULL) {
1074                 goto fail;
1075         }
1076         req = tldap_sasl_bind_send(frame, ev, ld, dn, mechanism, creds,
1077                                    sctrls, num_sctrls, cctrls, num_cctrls);
1078         if (req == NULL) {
1079                 goto fail;
1080         }
1081         if (!tevent_req_poll(req, ev)) {
1082                 rc = TLDAP_OPERATIONS_ERROR;
1083                 goto fail;
1084         }
1085         rc = tldap_sasl_bind_recv(req, mem_ctx, serverSaslCreds);
1086         tldap_save_msg(ld, req);
1087  fail:
1088         TALLOC_FREE(frame);
1089         return rc;
1090 }
1091
1092 struct tevent_req *tldap_simple_bind_send(TALLOC_CTX *mem_ctx,
1093                                           struct tevent_context *ev,
1094                                           struct tldap_context *ld,
1095                                           const char *dn,
1096                                           const char *passwd)
1097 {
1098         DATA_BLOB cred;
1099
1100         if (passwd != NULL) {
1101                 cred.data = discard_const_p(uint8_t, passwd);
1102                 cred.length = strlen(passwd);
1103         } else {
1104                 cred.data = discard_const_p(uint8_t, "");
1105                 cred.length = 0;
1106         }
1107         return tldap_sasl_bind_send(mem_ctx, ev, ld, dn, NULL, &cred, NULL, 0,
1108                                     NULL, 0);
1109 }
1110
1111 TLDAPRC tldap_simple_bind_recv(struct tevent_req *req)
1112 {
1113         return tldap_sasl_bind_recv(req, NULL, NULL);
1114 }
1115
1116 TLDAPRC tldap_simple_bind(struct tldap_context *ld, const char *dn,
1117                           const char *passwd)
1118 {
1119         DATA_BLOB cred;
1120
1121         if (passwd != NULL) {
1122                 cred.data = discard_const_p(uint8_t, passwd);
1123                 cred.length = strlen(passwd);
1124         } else {
1125                 cred.data = discard_const_p(uint8_t, "");
1126                 cred.length = 0;
1127         }
1128         return tldap_sasl_bind(ld, dn, NULL, &cred, NULL, 0, NULL, 0,
1129                                NULL, NULL);
1130 }
1131
1132 /*****************************************************************************/
1133
1134 /* can't use isalpha() as only a strict set is valid for LDAP */
1135
1136 static bool tldap_is_alpha(char c)
1137 {
1138         return (((c >= 'a') && (c <= 'z')) || \
1139                 ((c >= 'A') && (c <= 'Z')));
1140 }
1141
1142 static bool tldap_is_adh(char c)
1143 {
1144         return tldap_is_alpha(c) || isdigit(c) || (c == '-');
1145 }
1146
1147 #define TLDAP_FILTER_AND  ASN1_CONTEXT(0)
1148 #define TLDAP_FILTER_OR   ASN1_CONTEXT(1)
1149 #define TLDAP_FILTER_NOT  ASN1_CONTEXT(2)
1150 #define TLDAP_FILTER_EQ   ASN1_CONTEXT(3)
1151 #define TLDAP_FILTER_SUB  ASN1_CONTEXT(4)
1152 #define TLDAP_FILTER_LE   ASN1_CONTEXT(5)
1153 #define TLDAP_FILTER_GE   ASN1_CONTEXT(6)
1154 #define TLDAP_FILTER_PRES ASN1_CONTEXT_SIMPLE(7)
1155 #define TLDAP_FILTER_APX  ASN1_CONTEXT(8)
1156 #define TLDAP_FILTER_EXT  ASN1_CONTEXT(9)
1157
1158 #define TLDAP_SUB_INI ASN1_CONTEXT_SIMPLE(0)
1159 #define TLDAP_SUB_ANY ASN1_CONTEXT_SIMPLE(1)
1160 #define TLDAP_SUB_FIN ASN1_CONTEXT_SIMPLE(2)
1161
1162
1163 /* oid's should be numerical only in theory,
1164  * but apparently some broken servers may have alphanum aliases instead.
1165  * Do like openldap libraries and allow alphanum aliases for oids, but
1166  * do not allow Tagging options in that case.
1167  */
1168 static bool tldap_is_attrdesc(const char *s, int len, bool no_tagopts)
1169 {
1170         bool is_oid = false;
1171         bool dot = false;
1172         int i;
1173
1174         /* first char has stricter rules */
1175         if (isdigit(*s)) {
1176                 is_oid = true;
1177         } else if (!tldap_is_alpha(*s)) {
1178                 /* bad first char */
1179                 return false;
1180         }
1181
1182         for (i = 1; i < len; i++) {
1183
1184                 if (is_oid) {
1185                         if (isdigit(s[i])) {
1186                                 dot = false;
1187                                 continue;
1188                         }
1189                         if (s[i] == '.') {
1190                                 if (dot) {
1191                                         /* malformed */
1192                                         return false;
1193                                 }
1194                                 dot = true;
1195                                 continue;
1196                         }
1197                 } else {
1198                         if (tldap_is_adh(s[i])) {
1199                                 continue;
1200                         }
1201                 }
1202
1203                 if (s[i] == ';') {
1204                         if (no_tagopts) {
1205                                 /* no tagging options */
1206                                 return false;
1207                         }
1208                         if (dot) {
1209                                 /* malformed */
1210                                 return false;
1211                         }
1212                         if ((i + 1) == len) {
1213                                 /* malformed */
1214                                 return false;
1215                         }
1216
1217                         is_oid = false;
1218                         continue;
1219                 }
1220         }
1221
1222         if (dot) {
1223                 /* malformed */
1224                 return false;
1225         }
1226
1227         return true;
1228 }
1229
1230 /* this function copies the value until the closing parenthesis is found. */
1231 static char *tldap_get_val(TALLOC_CTX *memctx,
1232                            const char *value, const char **_s)
1233 {
1234         const char *s = value;
1235
1236         /* find terminator */
1237         while (*s) {
1238                 s = strchr(s, ')');
1239                 if (s && (*(s - 1) == '\\')) {
1240                         continue;
1241                 }
1242                 break;
1243         }
1244         if (!s || !(*s == ')')) {
1245                 /* malformed filter */
1246                 return NULL;
1247         }
1248
1249         *_s = s;
1250
1251         return talloc_strndup(memctx, value, s - value);
1252 }
1253
1254 static int tldap_hex2char(const char *x)
1255 {
1256         if (isxdigit(x[0]) && isxdigit(x[1])) {
1257                 const char h1 = x[0], h2 = x[1];
1258                 int c = 0;
1259
1260                 if (h1 >= 'a') c = h1 - (int)'a' + 10;
1261                 else if (h1 >= 'A') c = h1 - (int)'A' + 10;
1262                 else if (h1 >= '0') c = h1 - (int)'0';
1263                 c = c << 4;
1264                 if (h2 >= 'a') c += h2 - (int)'a' + 10;
1265                 else if (h2 >= 'A') c += h2 - (int)'A' + 10;
1266                 else if (h2 >= '0') c += h2 - (int)'0';
1267
1268                 return c;
1269         }
1270
1271         return -1;
1272 }
1273
1274 static bool tldap_find_first_star(const char *val, const char **star)
1275 {
1276         const char *s;
1277
1278         for (s = val; *s; s++) {
1279                 switch (*s) {
1280                 case '\\':
1281                         if (isxdigit(s[1]) && isxdigit(s[2])) {
1282                                 s += 2;
1283                                 break;
1284                         }
1285                         /* not hex based escape, check older syntax */
1286                         switch (s[1]) {
1287                         case '(':
1288                         case ')':
1289                         case '*':
1290                         case '\\':
1291                                 s++;
1292                                 break;
1293                         default:
1294                                 /* invalid escape sequence */
1295                                 return false;
1296                         }
1297                         break;
1298                 case ')':
1299                         /* end of val, nothing found */
1300                         *star = s;
1301                         return true;
1302
1303                 case '*':
1304                         *star = s;
1305                         return true;
1306                 }
1307         }
1308
1309         /* string ended without closing parenthesis, filter is malformed */
1310         return false;
1311 }
1312
1313 static bool tldap_unescape_inplace(char *value, size_t *val_len)
1314 {
1315         int c;
1316         size_t i, p;
1317
1318         for (i = 0,p = 0; i < *val_len; i++) {
1319
1320                 switch (value[i]) {
1321                 case '(':
1322                 case ')':
1323                 case '*':
1324                         /* these must be escaped */
1325                         return false;
1326
1327                 case '\\':
1328                         if (!value[i + 1]) {
1329                                 /* invalid EOL */
1330                                 return false;
1331                         }
1332                         i++;
1333
1334                         /* LDAPv3 escaped */
1335                         c = tldap_hex2char(&value[i]);
1336                         if (c >= 0 && c < 256) {
1337                                 value[p] = c;
1338                                 i++;
1339                                 p++;
1340                                 break;
1341                         }
1342
1343                         /* LDAPv2 escaped */
1344                         switch (value[i]) {
1345                         case '(':
1346                         case ')':
1347                         case '*':
1348                         case '\\':
1349                                 value[p] = value[i];
1350                                 p++;
1351
1352                                 break;
1353                         default:
1354                                 /* invalid */
1355                                 return false;
1356                         }
1357                         break;
1358
1359                 default:
1360                         value[p] = value[i];
1361                         p++;
1362                 }
1363         }
1364         value[p] = '\0';
1365         *val_len = p;
1366         return true;
1367 }
1368
1369 static bool tldap_push_filter_basic(struct tldap_context *ld,
1370                                     struct asn1_data *data,
1371                                     const char **_s);
1372 static bool tldap_push_filter_substring(struct tldap_context *ld,
1373                                         struct asn1_data *data,
1374                                         const char *val,
1375                                         const char **_s);
1376 static bool tldap_push_filter_int(struct tldap_context *ld,
1377                                   struct asn1_data *data,
1378                                   const char **_s)
1379 {
1380         const char *s = *_s;
1381         bool ret;
1382
1383         if (*s != '(') {
1384                 tldap_debug(ld, TLDAP_DEBUG_ERROR,
1385                             "Incomplete or malformed filter\n");
1386                 return false;
1387         }
1388         s++;
1389
1390         /* we are right after a parenthesis,
1391          * find out what op we have at hand */
1392         switch (*s) {
1393         case '&':
1394                 tldap_debug(ld, TLDAP_DEBUG_TRACE, "Filter op: AND\n");
1395                 if (!asn1_push_tag(data, TLDAP_FILTER_AND)) return false;
1396                 s++;
1397                 break;
1398
1399         case '|':
1400                 tldap_debug(ld, TLDAP_DEBUG_TRACE, "Filter op: OR\n");
1401                 if (!asn1_push_tag(data, TLDAP_FILTER_OR)) return false;
1402                 s++;
1403                 break;
1404
1405         case '!':
1406                 tldap_debug(ld, TLDAP_DEBUG_TRACE, "Filter op: NOT\n");
1407                 if (!asn1_push_tag(data, TLDAP_FILTER_NOT)) return false;
1408                 s++;
1409                 ret = tldap_push_filter_int(ld, data, &s);
1410                 if (!ret) {
1411                         return false;
1412                 }
1413                 if (!asn1_pop_tag(data)) return false;
1414                 goto done;
1415
1416         case '(':
1417         case ')':
1418                 tldap_debug(ld, TLDAP_DEBUG_ERROR,
1419                             "Invalid parenthesis '%c'\n", *s);
1420                 return false;
1421
1422         case '\0':
1423                 tldap_debug(ld, TLDAP_DEBUG_ERROR,
1424                             "Invalid filter termination\n");
1425                 return false;
1426
1427         default:
1428                 ret = tldap_push_filter_basic(ld, data, &s);
1429                 if (!ret) {
1430                         return false;
1431                 }
1432                 goto done;
1433         }
1434
1435         /* only and/or filters get here.
1436          * go through the list of filters */
1437
1438         if (*s == ')') {
1439                 /* RFC 4526: empty and/or */
1440                 if (!asn1_pop_tag(data)) return false;
1441                 goto done;
1442         }
1443
1444         while (*s) {
1445                 ret = tldap_push_filter_int(ld, data, &s);
1446                 if (!ret) {
1447                         return false;
1448                 }
1449
1450                 if (*s == ')') {
1451                         /* end of list, return */
1452                         if (!asn1_pop_tag(data)) return false;
1453                         break;
1454                 }
1455         }
1456
1457 done:
1458         if (*s != ')') {
1459                 tldap_debug(ld, TLDAP_DEBUG_ERROR,
1460                             "Incomplete or malformed filter\n");
1461                 return false;
1462         }
1463         s++;
1464
1465         if (asn1_has_error(data)) {
1466                 return false;
1467         }
1468
1469         *_s = s;
1470         return true;
1471 }
1472
1473
1474 static bool tldap_push_filter_basic(struct tldap_context *ld,
1475                                     struct asn1_data *data,
1476                                     const char **_s)
1477 {
1478         TALLOC_CTX *tmpctx = talloc_tos();
1479         const char *s = *_s;
1480         const char *e;
1481         const char *eq;
1482         const char *val;
1483         const char *type;
1484         const char *dn;
1485         const char *rule;
1486         const char *star;
1487         size_t type_len = 0;
1488         char *uval;
1489         size_t uval_len;
1490         bool write_octect = true;
1491         bool ret;
1492
1493         eq = strchr(s, '=');
1494         if (!eq) {
1495                 tldap_debug(ld, TLDAP_DEBUG_ERROR,
1496                             "Invalid filter, missing equal sign\n");
1497                 return false;
1498         }
1499
1500         val = eq + 1;
1501         e = eq - 1;
1502
1503         switch (*e) {
1504         case '<':
1505                 if (!asn1_push_tag(data, TLDAP_FILTER_LE)) return false;
1506                 break;
1507
1508         case '>':
1509                 if (!asn1_push_tag(data, TLDAP_FILTER_GE)) return false;
1510                 break;
1511
1512         case '~':
1513                 if (!asn1_push_tag(data, TLDAP_FILTER_APX)) return false;
1514                 break;
1515
1516         case ':':
1517                 if (!asn1_push_tag(data, TLDAP_FILTER_EXT)) return false;
1518                 write_octect = false;
1519
1520                 type = NULL;
1521                 dn = NULL;
1522                 rule = NULL;
1523
1524                 if (*s == ':') { /* [:dn]:rule:= value */
1525                         if (s == e) {
1526                                 /* malformed filter */
1527                                 return false;
1528                         }
1529                         dn = s;
1530                 } else { /* type[:dn][:rule]:= value */
1531                         type = s;
1532                         dn = strchr(s, ':');
1533                         type_len = dn - type;
1534                         if (dn == e) { /* type:= value */
1535                                 dn = NULL;
1536                         }
1537                 }
1538                 if (dn) {
1539                         dn++;
1540
1541                         rule = strchr(dn, ':');
1542                         if (rule == NULL) {
1543                                 return false;
1544                         }
1545                         if ((rule == dn + 1) || rule + 1 == e) {
1546                                 /* malformed filter, contains "::" */
1547                                 return false;
1548                         }
1549
1550                         if (strncasecmp_m(dn, "dn:", 3) != 0) {
1551                                 if (rule == e) {
1552                                         rule = dn;
1553                                         dn = NULL;
1554                                 } else {
1555                                         /* malformed filter. With two
1556                                          * optionals, the first must be "dn"
1557                                          */
1558                                         return false;
1559                                 }
1560                         } else {
1561                                 if (rule == e) {
1562                                         rule = NULL;
1563                                 } else {
1564                                         rule++;
1565                                 }
1566                         }
1567                 }
1568
1569                 if (!type && !dn && !rule) {
1570                         /* malformed filter, there must be at least one */
1571                         return false;
1572                 }
1573
1574                 /*
1575                   MatchingRuleAssertion ::= SEQUENCE {
1576                   matchingRule    [1] MatchingRuleID OPTIONAL,
1577                   type      [2] AttributeDescription OPTIONAL,
1578                   matchValue      [3] AssertionValue,
1579                   dnAttributes    [4] BOOLEAN DEFAULT FALSE
1580                   }
1581                 */
1582
1583                 /* check and add rule */
1584                 if (rule) {
1585                         ret = tldap_is_attrdesc(rule, e - rule, true);
1586                         if (!ret) {
1587                                 return false;
1588                         }
1589                         if (!asn1_push_tag(data, ASN1_CONTEXT_SIMPLE(1))) return false;
1590                         if (!asn1_write(data, rule, e - rule)) return false;
1591                         if (!asn1_pop_tag(data)) return false;
1592                 }
1593
1594                 /* check and add type */
1595                 if (type) {
1596                         ret = tldap_is_attrdesc(type, type_len, false);
1597                         if (!ret) {
1598                                 return false;
1599                         }
1600                         if (!asn1_push_tag(data, ASN1_CONTEXT_SIMPLE(2))) return false;
1601                         if (!asn1_write(data, type, type_len)) return false;
1602                         if (!asn1_pop_tag(data)) return false;
1603                 }
1604
1605                 uval = tldap_get_val(tmpctx, val, _s);
1606                 if (!uval) {
1607                         return false;
1608                 }
1609                 uval_len = *_s - val;
1610                 ret = tldap_unescape_inplace(uval, &uval_len);
1611                 if (!ret) {
1612                         return false;
1613                 }
1614
1615                 if (!asn1_push_tag(data, ASN1_CONTEXT_SIMPLE(3))) return false;
1616                 if (!asn1_write(data, uval, uval_len)) return false;
1617                 if (!asn1_pop_tag(data)) return false;
1618
1619                 if (!asn1_push_tag(data, ASN1_CONTEXT_SIMPLE(4))) return false;
1620                 if (!asn1_write_uint8(data, dn?1:0)) return false;
1621                 if (!asn1_pop_tag(data)) return false;
1622                 break;
1623
1624         default:
1625                 e = eq;
1626
1627                 ret = tldap_is_attrdesc(s, e - s, false);
1628                 if (!ret) {
1629                         return false;
1630                 }
1631
1632                 if (strncmp(val, "*)", 2) == 0) {
1633                         /* presence */
1634                         if (!asn1_push_tag(data, TLDAP_FILTER_PRES)) return false;
1635                         if (!asn1_write(data, s, e - s)) return false;
1636                         *_s = val + 1;
1637                         write_octect = false;
1638                         break;
1639                 }
1640
1641                 ret = tldap_find_first_star(val, &star);
1642                 if (!ret) {
1643                         return false;
1644                 }
1645                 if (*star == '*') {
1646                         /* substring */
1647                         if (!asn1_push_tag(data, TLDAP_FILTER_SUB)) return false;
1648                         if (!asn1_write_OctetString(data, s, e - s)) return false;
1649                         ret = tldap_push_filter_substring(ld, data, val, &s);
1650                         if (!ret) {
1651                                 return false;
1652                         }
1653                         *_s = s;
1654                         write_octect = false;
1655                         break;
1656                 }
1657
1658                 /* if nothing else, then it is just equality */
1659                 if (!asn1_push_tag(data, TLDAP_FILTER_EQ)) return false;
1660                 write_octect = true;
1661                 break;
1662         }
1663
1664         if (write_octect) {
1665                 uval = tldap_get_val(tmpctx, val, _s);
1666                 if (!uval) {
1667                         return false;
1668                 }
1669                 uval_len = *_s - val;
1670                 ret = tldap_unescape_inplace(uval, &uval_len);
1671                 if (!ret) {
1672                         return false;
1673                 }
1674
1675                 if (!asn1_write_OctetString(data, s, e - s)) return false;
1676                 if (!asn1_write_OctetString(data, uval, uval_len)) return false;
1677         }
1678
1679         if (asn1_has_error(data)) {
1680                 return false;
1681         }
1682         return asn1_pop_tag(data);
1683 }
1684
1685 static bool tldap_push_filter_substring(struct tldap_context *ld,
1686                                         struct asn1_data *data,
1687                                         const char *val,
1688                                         const char **_s)
1689 {
1690         TALLOC_CTX *tmpctx = talloc_tos();
1691         bool initial = true;
1692         const char *star;
1693         char *chunk;
1694         size_t chunk_len;
1695         bool ret;
1696
1697         /*
1698           SubstringFilter ::= SEQUENCE {
1699                   type      AttributeDescription,
1700                   -- at least one must be present
1701                   substrings      SEQUENCE OF CHOICE {
1702                           initial [0] LDAPString,
1703                           any     [1] LDAPString,
1704                           final   [2] LDAPString } }
1705         */
1706         if (!asn1_push_tag(data, ASN1_SEQUENCE(0))) return false;
1707
1708         do {
1709                 ret = tldap_find_first_star(val, &star);
1710                 if (!ret) {
1711                         return false;
1712                 }
1713                 chunk_len = star - val;
1714
1715                 switch (*star) {
1716                 case '*':
1717                         if (!initial && chunk_len == 0) {
1718                                 /* found '**', which is illegal */
1719                                 return false;
1720                         }
1721                         break;
1722                 case ')':
1723                         if (initial) {
1724                                 /* no stars ?? */
1725                                 return false;
1726                         }
1727                         /* we are done */
1728                         break;
1729                 default:
1730                         /* ?? */
1731                         return false;
1732                 }
1733
1734                 if (initial && chunk_len == 0) {
1735                         val = star + 1;
1736                         initial = false;
1737                         continue;
1738                 }
1739
1740                 chunk = talloc_strndup(tmpctx, val, chunk_len);
1741                 if (!chunk) {
1742                         return false;
1743                 }
1744                 ret = tldap_unescape_inplace(chunk, &chunk_len);
1745                 if (!ret) {
1746                         return false;
1747                 }
1748                 switch (*star) {
1749                 case '*':
1750                         if (initial) {
1751                                 if (!asn1_push_tag(data, TLDAP_SUB_INI)) return false;
1752                                 initial = false;
1753                         } else {
1754                                 if (!asn1_push_tag(data, TLDAP_SUB_ANY)) return false;
1755                         }
1756                         break;
1757                 case ')':
1758                         if (!asn1_push_tag(data, TLDAP_SUB_FIN)) return false;
1759                         break;
1760                 default:
1761                         /* ?? */
1762                         return false;
1763                 }
1764                 if (!asn1_write(data, chunk, chunk_len)) return false;
1765                 if (!asn1_pop_tag(data)) return false;
1766
1767                 val = star + 1;
1768
1769         } while (*star == '*');
1770
1771         *_s = star;
1772
1773         /* end of sequence */
1774         return asn1_pop_tag(data);
1775 }
1776
1777 /* NOTE: although openldap libraries allow for spaces in some places, mosly
1778  * around parenthesis, we do not allow any spaces (except in values of
1779  * course) as I couldn't fine any place in RFC 4512 or RFC 4515 where
1780  * leading or trailing spaces where allowed.
1781  */
1782 static bool tldap_push_filter(struct tldap_context *ld,
1783                               struct asn1_data *data,
1784                               const char *filter)
1785 {
1786         const char *s = filter;
1787         bool ret;
1788
1789         ret = tldap_push_filter_int(ld, data, &s);
1790         if (ret && *s) {
1791                 tldap_debug(ld, TLDAP_DEBUG_ERROR,
1792                             "Incomplete or malformed filter\n");
1793                 return false;
1794         }
1795         return ret;
1796 }
1797
1798 /*****************************************************************************/
1799
1800 static void tldap_search_done(struct tevent_req *subreq);
1801
1802 struct tevent_req *tldap_search_send(TALLOC_CTX *mem_ctx,
1803                                      struct tevent_context *ev,
1804                                      struct tldap_context *ld,
1805                                      const char *base, int scope,
1806                                      const char *filter,
1807                                      const char **attrs,
1808                                      int num_attrs,
1809                                      int attrsonly,
1810                                      struct tldap_control *sctrls,
1811                                      int num_sctrls,
1812                                      struct tldap_control *cctrls,
1813                                      int num_cctrls,
1814                                      int timelimit,
1815                                      int sizelimit,
1816                                      int deref)
1817 {
1818         struct tevent_req *req, *subreq;
1819         struct tldap_req_state *state;
1820         int i;
1821
1822         req = tldap_req_create(mem_ctx, ld, &state);
1823         if (req == NULL) {
1824                 return NULL;
1825         }
1826
1827         if (!asn1_push_tag(state->out, TLDAP_REQ_SEARCH)) goto encoding_error;
1828         if (!asn1_write_OctetString(state->out, base, strlen(base))) goto encoding_error;
1829         if (!asn1_write_enumerated(state->out, scope)) goto encoding_error;
1830         if (!asn1_write_enumerated(state->out, deref)) goto encoding_error;
1831         if (!asn1_write_Integer(state->out, sizelimit)) goto encoding_error;
1832         if (!asn1_write_Integer(state->out, timelimit)) goto encoding_error;
1833         if (!asn1_write_BOOLEAN(state->out, attrsonly)) goto encoding_error;
1834
1835         if (!tldap_push_filter(ld, state->out, filter)) {
1836                 goto encoding_error;
1837         }
1838
1839         if (!asn1_push_tag(state->out, ASN1_SEQUENCE(0))) goto encoding_error;
1840         for (i=0; i<num_attrs; i++) {
1841                 if (!asn1_write_OctetString(state->out, attrs[i], strlen(attrs[i]))) goto encoding_error;
1842         }
1843         if (!asn1_pop_tag(state->out)) goto encoding_error;
1844         if (!asn1_pop_tag(state->out)) goto encoding_error;
1845
1846         subreq = tldap_msg_send(state, ev, ld, state->id, state->out,
1847                                 sctrls, num_sctrls);
1848         if (tevent_req_nomem(subreq, req)) {
1849                 return tevent_req_post(req, ev);
1850         }
1851         tevent_req_set_callback(subreq, tldap_search_done, req);
1852         return req;
1853
1854  encoding_error:
1855         tevent_req_ldap_error(req, TLDAP_ENCODING_ERROR);
1856         return tevent_req_post(req, ev);
1857 }
1858
1859 static void tldap_search_done(struct tevent_req *subreq)
1860 {
1861         struct tevent_req *req = tevent_req_callback_data(
1862                 subreq, struct tevent_req);
1863         struct tldap_req_state *state = tevent_req_data(
1864                 req, struct tldap_req_state);
1865         TLDAPRC rc;
1866
1867         rc = tldap_msg_recv(subreq, state, &state->result);
1868         if (tevent_req_ldap_error(req, rc)) {
1869                 return;
1870         }
1871         switch (state->result->type) {
1872         case TLDAP_RES_SEARCH_ENTRY:
1873         case TLDAP_RES_SEARCH_REFERENCE:
1874                 if (!tldap_msg_set_pending(subreq)) {
1875                         tevent_req_oom(req);
1876                         return;
1877                 }
1878                 tevent_req_notify_callback(req);
1879                 break;
1880         case TLDAP_RES_SEARCH_RESULT:
1881                 TALLOC_FREE(subreq);
1882                 if (!asn1_start_tag(state->result->data,
1883                                     state->result->type) ||
1884                     !tldap_decode_response(state) ||
1885                     !asn1_end_tag(state->result->data) ||
1886                     !tldap_decode_controls(state)) {
1887                         tevent_req_ldap_error(req, TLDAP_DECODING_ERROR);
1888                         return;
1889                 }
1890                 tevent_req_done(req);
1891                 break;
1892         default:
1893                 tevent_req_ldap_error(req, TLDAP_PROTOCOL_ERROR);
1894                 return;
1895         }
1896 }
1897
1898 TLDAPRC tldap_search_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
1899                           struct tldap_message **pmsg)
1900 {
1901         struct tldap_req_state *state = tevent_req_data(
1902                 req, struct tldap_req_state);
1903         TLDAPRC rc;
1904
1905         if (!tevent_req_is_in_progress(req)
1906             && tevent_req_is_ldap_error(req, &rc)) {
1907                 return rc;
1908         }
1909
1910         if (tevent_req_is_in_progress(req)) {
1911                 switch (state->result->type) {
1912                 case TLDAP_RES_SEARCH_ENTRY:
1913                 case TLDAP_RES_SEARCH_REFERENCE:
1914                         break;
1915                 default:
1916                         return TLDAP_OPERATIONS_ERROR;
1917                 }
1918         }
1919
1920         *pmsg = talloc_move(mem_ctx, &state->result);
1921         return TLDAP_SUCCESS;
1922 }
1923
1924 struct tldap_search_all_state {
1925         struct tldap_message **msgs;
1926         struct tldap_message *result;
1927 };
1928
1929 static void tldap_search_all_done(struct tevent_req *subreq);
1930
1931 struct tevent_req *tldap_search_all_send(
1932         TALLOC_CTX *mem_ctx, struct tevent_context *ev,
1933         struct tldap_context *ld, const char *base, int scope,
1934         const char *filter, const char **attrs, int num_attrs, int attrsonly,
1935         struct tldap_control *sctrls, int num_sctrls,
1936         struct tldap_control *cctrls, int num_cctrls,
1937         int timelimit, int sizelimit, int deref)
1938 {
1939         struct tevent_req *req, *subreq;
1940         struct tldap_search_all_state *state;
1941
1942         req = tevent_req_create(mem_ctx, &state,
1943                                 struct tldap_search_all_state);
1944         if (req == NULL) {
1945                 return NULL;
1946         }
1947
1948         subreq = tldap_search_send(state, ev, ld, base, scope, filter,
1949                                    attrs, num_attrs, attrsonly,
1950                                    sctrls, num_sctrls, cctrls, num_cctrls,
1951                                    timelimit, sizelimit, deref);
1952         if (tevent_req_nomem(subreq, req)) {
1953                 return tevent_req_post(req, ev);
1954         }
1955         tevent_req_set_callback(subreq, tldap_search_all_done, req);
1956         return req;
1957 }
1958
1959 static void tldap_search_all_done(struct tevent_req *subreq)
1960 {
1961         struct tevent_req *req = tevent_req_callback_data(
1962                 subreq, struct tevent_req);
1963         struct tldap_search_all_state *state = tevent_req_data(
1964                 req, struct tldap_search_all_state);
1965         struct tldap_message *msg, **tmp;
1966         size_t num_msgs;
1967         TLDAPRC rc;
1968         int msgtype;
1969
1970         rc = tldap_search_recv(subreq, state, &msg);
1971         /* No TALLOC_FREE(subreq), this is multi-step */
1972         if (tevent_req_ldap_error(req, rc)) {
1973                 return;
1974         }
1975
1976         msgtype = tldap_msg_type(msg);
1977         if (msgtype == TLDAP_RES_SEARCH_RESULT) {
1978                 state->result = msg;
1979                 tevent_req_done(req);
1980                 return;
1981         }
1982
1983         num_msgs = talloc_array_length(state->msgs);
1984
1985         tmp = talloc_realloc(state, state->msgs, struct tldap_message *,
1986                              num_msgs + 1);
1987         if (tevent_req_nomem(tmp, req)) {
1988                 return;
1989         }
1990         state->msgs = tmp;
1991         state->msgs[num_msgs] = talloc_move(state->msgs, &msg);
1992 }
1993
1994 TLDAPRC tldap_search_all_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
1995                               struct tldap_message ***msgs,
1996                               struct tldap_message **result)
1997 {
1998         struct tldap_search_all_state *state = tevent_req_data(
1999                 req, struct tldap_search_all_state);
2000         TLDAPRC rc;
2001
2002         if (tevent_req_is_ldap_error(req, &rc)) {
2003                 return rc;
2004         }
2005
2006         if (msgs != NULL) {
2007                 *msgs = talloc_move(mem_ctx, &state->msgs);
2008         }
2009         if (result != NULL) {
2010                 *result = talloc_move(mem_ctx, &state->result);
2011         }
2012
2013         return TLDAP_SUCCESS;
2014 }
2015
2016 TLDAPRC tldap_search(struct tldap_context *ld,
2017                      const char *base, int scope, const char *filter,
2018                      const char **attrs, int num_attrs, int attrsonly,
2019                      struct tldap_control *sctrls, int num_sctrls,
2020                      struct tldap_control *cctrls, int num_cctrls,
2021                      int timelimit, int sizelimit, int deref,
2022                      TALLOC_CTX *mem_ctx, struct tldap_message ***pmsgs)
2023 {
2024         TALLOC_CTX *frame;
2025         struct tevent_context *ev;
2026         struct tevent_req *req;
2027         TLDAPRC rc = TLDAP_NO_MEMORY;
2028         struct tldap_message **msgs;
2029         struct tldap_message *result;
2030
2031         if (tldap_pending_reqs(ld)) {
2032                 return TLDAP_BUSY;
2033         }
2034
2035         frame = talloc_stackframe();
2036
2037         ev = samba_tevent_context_init(frame);
2038         if (ev == NULL) {
2039                 goto fail;
2040         }
2041         req = tldap_search_all_send(frame, ev, ld, base, scope, filter,
2042                                     attrs, num_attrs, attrsonly,
2043                                     sctrls, num_sctrls, cctrls, num_cctrls,
2044                                     timelimit, sizelimit, deref);
2045         if (req == NULL) {
2046                 goto fail;
2047         }
2048         if (!tevent_req_poll(req, ev)) {
2049                 rc = TLDAP_OPERATIONS_ERROR;
2050                 goto fail;
2051         }
2052         rc = tldap_search_all_recv(req, frame, &msgs, &result);
2053         TALLOC_FREE(req);
2054         if (!TLDAP_RC_IS_SUCCESS(rc)) {
2055                 goto fail;
2056         }
2057
2058         TALLOC_FREE(ld->last_msg);
2059         ld->last_msg = talloc_move(ld, &result);
2060
2061         if (pmsgs != NULL) {
2062                 *pmsgs = talloc_move(mem_ctx, &msgs);
2063         }
2064 fail:
2065         TALLOC_FREE(frame);
2066         return rc;
2067 }
2068
2069 static bool tldap_parse_search_entry(struct tldap_message *msg)
2070 {
2071         int num_attribs = 0;
2072
2073         if (msg->type != TLDAP_RES_SEARCH_ENTRY) {
2074                 return false;
2075         }
2076         if (!asn1_start_tag(msg->data, TLDAP_RES_SEARCH_ENTRY)) {
2077                 return false;
2078         }
2079
2080         /* dn */
2081
2082         if (!asn1_read_OctetString_talloc(msg, msg->data, &msg->dn)) return false;
2083
2084         if (msg->dn == NULL) {
2085                 return false;
2086         }
2087
2088         /*
2089          * Attributes: We overallocate msg->attribs by one, so that while
2090          * looping over the attributes we can directly parse into the last
2091          * array element. Same for the values in the inner loop.
2092          */
2093
2094         msg->attribs = talloc_array(msg, struct tldap_attribute, 1);
2095         if (msg->attribs == NULL) {
2096                 return false;
2097         }
2098
2099         if (!asn1_start_tag(msg->data, ASN1_SEQUENCE(0))) return false;
2100         while (asn1_peek_tag(msg->data, ASN1_SEQUENCE(0))) {
2101                 struct tldap_attribute *attrib;
2102                 int num_values = 0;
2103
2104                 attrib = &msg->attribs[num_attribs];
2105                 attrib->values = talloc_array(msg->attribs, DATA_BLOB, 1);
2106                 if (attrib->values == NULL) {
2107                         return false;
2108                 }
2109                 if (!asn1_start_tag(msg->data, ASN1_SEQUENCE(0))) return false;
2110                 if (!asn1_read_OctetString_talloc(msg->attribs, msg->data,
2111                                              &attrib->name)) return false;
2112                 if (!asn1_start_tag(msg->data, ASN1_SET)) return false;
2113
2114                 while (asn1_peek_tag(msg->data, ASN1_OCTET_STRING)) {
2115                         if (!asn1_read_OctetString(msg->data, msg,
2116                                               &attrib->values[num_values])) return false;
2117
2118                         attrib->values = talloc_realloc(
2119                                 msg->attribs, attrib->values, DATA_BLOB,
2120                                 num_values + 2);
2121                         if (attrib->values == NULL) {
2122                                 return false;
2123                         }
2124                         num_values += 1;
2125                 }
2126                 attrib->values = talloc_realloc(msg->attribs, attrib->values,
2127                                                 DATA_BLOB, num_values);
2128                 attrib->num_values = num_values;
2129
2130                 if (!asn1_end_tag(msg->data)) return false; /* ASN1_SET */
2131                 if (!asn1_end_tag(msg->data)) return false; /* ASN1_SEQUENCE(0) */
2132                 msg->attribs = talloc_realloc(
2133                         msg, msg->attribs, struct tldap_attribute,
2134                         num_attribs + 2);
2135                 if (msg->attribs == NULL) {
2136                         return false;
2137                 }
2138                 num_attribs += 1;
2139         }
2140         msg->attribs = talloc_realloc(
2141                 msg, msg->attribs, struct tldap_attribute, num_attribs);
2142         return asn1_end_tag(msg->data);
2143 }
2144
2145 bool tldap_entry_dn(struct tldap_message *msg, char **dn)
2146 {
2147         if ((msg->dn == NULL) && (!tldap_parse_search_entry(msg))) {
2148                 return false;
2149         }
2150         *dn = msg->dn;
2151         return true;
2152 }
2153
2154 bool tldap_entry_attributes(struct tldap_message *msg,
2155                             struct tldap_attribute **attributes,
2156                             int *num_attributes)
2157 {
2158         if ((msg->dn == NULL) && (!tldap_parse_search_entry(msg))) {
2159                 return false;
2160         }
2161         *attributes = msg->attribs;
2162         *num_attributes = talloc_array_length(msg->attribs);
2163         return true;
2164 }
2165
2166 static bool tldap_decode_controls(struct tldap_req_state *state)
2167 {
2168         struct tldap_message *msg = state->result;
2169         struct asn1_data *data = msg->data;
2170         struct tldap_control *sctrls = NULL;
2171         int num_controls = 0;
2172         bool ret = false;
2173
2174         msg->res_sctrls = NULL;
2175
2176         if (!asn1_peek_tag(data, ASN1_CONTEXT(0))) {
2177                 return true;
2178         }
2179
2180         if (!asn1_start_tag(data, ASN1_CONTEXT(0))) goto out;
2181
2182         while (asn1_peek_tag(data, ASN1_SEQUENCE(0))) {
2183                 struct tldap_control *c;
2184                 char *oid = NULL;
2185
2186                 sctrls = talloc_realloc(msg, sctrls, struct tldap_control,
2187                                         num_controls + 1);
2188                 if (sctrls == NULL) {
2189                         goto out;
2190                 }
2191                 c = &sctrls[num_controls];
2192
2193                 if (!asn1_start_tag(data, ASN1_SEQUENCE(0))) goto out;
2194                 if (!asn1_read_OctetString_talloc(msg, data, &oid)) goto out;
2195                 if (asn1_has_error(data) || (oid == NULL)) {
2196                         goto out;
2197                 }
2198                 c->oid = oid;
2199                 if (asn1_peek_tag(data, ASN1_BOOLEAN)) {
2200                         if (!asn1_read_BOOLEAN(data, &c->critical)) goto out;
2201                 } else {
2202                         c->critical = false;
2203                 }
2204                 c->value = data_blob_null;
2205                 if (asn1_peek_tag(data, ASN1_OCTET_STRING) &&
2206                     !asn1_read_OctetString(data, msg, &c->value)) {
2207                         goto out;
2208                 }
2209                 if (!asn1_end_tag(data)) goto out; /* ASN1_SEQUENCE(0) */
2210
2211                 num_controls += 1;
2212         }
2213
2214         if (!asn1_end_tag(data)) goto out;      /* ASN1_CONTEXT(0) */
2215
2216         ret = true;
2217
2218  out:
2219
2220         if (ret) {
2221                 msg->res_sctrls = sctrls;
2222         } else {
2223                 TALLOC_FREE(sctrls);
2224         }
2225         return ret;
2226 }
2227
2228 static void tldap_simple_done(struct tevent_req *subreq, int type)
2229 {
2230         struct tevent_req *req = tevent_req_callback_data(
2231                 subreq, struct tevent_req);
2232         struct tldap_req_state *state = tevent_req_data(
2233                 req, struct tldap_req_state);
2234         TLDAPRC rc;
2235
2236         rc = tldap_msg_recv(subreq, state, &state->result);
2237         TALLOC_FREE(subreq);
2238         if (tevent_req_ldap_error(req, rc)) {
2239                 return;
2240         }
2241         if (state->result->type != type) {
2242                 tevent_req_ldap_error(req, TLDAP_PROTOCOL_ERROR);
2243                 return;
2244         }
2245         if (!asn1_start_tag(state->result->data, state->result->type) ||
2246             !tldap_decode_response(state) ||
2247             !asn1_end_tag(state->result->data) ||
2248             !tldap_decode_controls(state)) {
2249                 tevent_req_ldap_error(req, TLDAP_DECODING_ERROR);
2250                 return;
2251         }
2252         if (!TLDAP_RC_IS_SUCCESS(state->result->lderr)) {
2253                 tevent_req_ldap_error(req, state->result->lderr);
2254                 return;
2255         }
2256         tevent_req_done(req);
2257 }
2258
2259 static TLDAPRC tldap_simple_recv(struct tevent_req *req)
2260 {
2261         TLDAPRC rc;
2262         if (tevent_req_is_ldap_error(req, &rc)) {
2263                 return rc;
2264         }
2265         return TLDAP_SUCCESS;
2266 }
2267
2268 static void tldap_add_done(struct tevent_req *subreq);
2269
2270 struct tevent_req *tldap_add_send(TALLOC_CTX *mem_ctx,
2271                                   struct tevent_context *ev,
2272                                   struct tldap_context *ld,
2273                                   const char *dn,
2274                                   struct tldap_mod *attributes,
2275                                   int num_attributes,
2276                                   struct tldap_control *sctrls,
2277                                   int num_sctrls,
2278                                   struct tldap_control *cctrls,
2279                                   int num_cctrls)
2280 {
2281         struct tevent_req *req, *subreq;
2282         struct tldap_req_state *state;
2283         int i, j;
2284
2285         req = tldap_req_create(mem_ctx, ld, &state);
2286         if (req == NULL) {
2287                 return NULL;
2288         }
2289
2290         if (!asn1_push_tag(state->out, TLDAP_REQ_ADD)) goto err;
2291         if (!asn1_write_OctetString(state->out, dn, strlen(dn))) goto err;
2292         if (!asn1_push_tag(state->out, ASN1_SEQUENCE(0))) goto err;
2293
2294         for (i=0; i<num_attributes; i++) {
2295                 struct tldap_mod *attrib = &attributes[i];
2296                 if (!asn1_push_tag(state->out, ASN1_SEQUENCE(0))) goto err;
2297                 if (!asn1_write_OctetString(state->out, attrib->attribute,
2298                                        strlen(attrib->attribute))) goto err;
2299                 if (!asn1_push_tag(state->out, ASN1_SET)) goto err;
2300                 for (j=0; j<attrib->num_values; j++) {
2301                         if (!asn1_write_OctetString(state->out,
2302                                                attrib->values[j].data,
2303                                                attrib->values[j].length)) goto err;
2304                 }
2305                 if (!asn1_pop_tag(state->out)) goto err;
2306                 if (!asn1_pop_tag(state->out)) goto err;
2307         }
2308
2309         if (!asn1_pop_tag(state->out)) goto err;
2310         if (!asn1_pop_tag(state->out)) goto err;
2311
2312         subreq = tldap_msg_send(state, ev, ld, state->id, state->out,
2313                                 sctrls, num_sctrls);
2314         if (tevent_req_nomem(subreq, req)) {
2315                 return tevent_req_post(req, ev);
2316         }
2317         tevent_req_set_callback(subreq, tldap_add_done, req);
2318         return req;
2319
2320   err:
2321
2322         tevent_req_ldap_error(req, TLDAP_ENCODING_ERROR);
2323         return tevent_req_post(req, ev);
2324 }
2325
2326 static void tldap_add_done(struct tevent_req *subreq)
2327 {
2328         tldap_simple_done(subreq, TLDAP_RES_ADD);
2329 }
2330
2331 TLDAPRC tldap_add_recv(struct tevent_req *req)
2332 {
2333         return tldap_simple_recv(req);
2334 }
2335
2336 TLDAPRC tldap_add(struct tldap_context *ld, const char *dn,
2337                   struct tldap_mod *attributes, int num_attributes,
2338                   struct tldap_control *sctrls, int num_sctrls,
2339                   struct tldap_control *cctrls, int num_cctrls)
2340 {
2341         TALLOC_CTX *frame = talloc_stackframe();
2342         struct tevent_context *ev;
2343         struct tevent_req *req;
2344         TLDAPRC rc = TLDAP_NO_MEMORY;
2345
2346         ev = samba_tevent_context_init(frame);
2347         if (ev == NULL) {
2348                 goto fail;
2349         }
2350         req = tldap_add_send(frame, ev, ld, dn, attributes, num_attributes,
2351                              sctrls, num_sctrls, cctrls, num_cctrls);
2352         if (req == NULL) {
2353                 goto fail;
2354         }
2355         if (!tevent_req_poll(req, ev)) {
2356                 rc = TLDAP_OPERATIONS_ERROR;
2357                 goto fail;
2358         }
2359         rc = tldap_add_recv(req);
2360         tldap_save_msg(ld, req);
2361  fail:
2362         TALLOC_FREE(frame);
2363         return rc;
2364 }
2365
2366 static void tldap_modify_done(struct tevent_req *subreq);
2367
2368 struct tevent_req *tldap_modify_send(TALLOC_CTX *mem_ctx,
2369                                      struct tevent_context *ev,
2370                                      struct tldap_context *ld,
2371                                      const char *dn,
2372                                      struct tldap_mod *mods, int num_mods,
2373                                      struct tldap_control *sctrls,
2374                                      int num_sctrls,
2375                                      struct tldap_control *cctrls,
2376                                      int num_cctrls)
2377 {
2378         struct tevent_req *req, *subreq;
2379         struct tldap_req_state *state;
2380         int i, j;
2381
2382         req = tldap_req_create(mem_ctx, ld, &state);
2383         if (req == NULL) {
2384                 return NULL;
2385         }
2386
2387         if (!asn1_push_tag(state->out, TLDAP_REQ_MODIFY)) goto err;
2388         if (!asn1_write_OctetString(state->out, dn, strlen(dn))) goto err;
2389         if (!asn1_push_tag(state->out, ASN1_SEQUENCE(0))) goto err;
2390
2391         for (i=0; i<num_mods; i++) {
2392                 struct tldap_mod *mod = &mods[i];
2393                 if (!asn1_push_tag(state->out, ASN1_SEQUENCE(0))) goto err;
2394                 if (!asn1_write_enumerated(state->out, mod->mod_op)) goto err;
2395                 if (!asn1_push_tag(state->out, ASN1_SEQUENCE(0))) goto err;
2396                 if (!asn1_write_OctetString(state->out, mod->attribute,
2397                                        strlen(mod->attribute))) goto err;
2398                 if (!asn1_push_tag(state->out, ASN1_SET)) goto err;
2399                 for (j=0; j<mod->num_values; j++) {
2400                         if (!asn1_write_OctetString(state->out,
2401                                                mod->values[j].data,
2402                                                mod->values[j].length)) goto err;
2403                 }
2404                 if (!asn1_pop_tag(state->out)) goto err;
2405                 if (!asn1_pop_tag(state->out)) goto err;
2406                 if (!asn1_pop_tag(state->out)) goto err;
2407         }
2408
2409         if (!asn1_pop_tag(state->out)) goto err;
2410         if (!asn1_pop_tag(state->out)) goto err;
2411
2412         subreq = tldap_msg_send(state, ev, ld, state->id, state->out,
2413                                 sctrls, num_sctrls);
2414         if (tevent_req_nomem(subreq, req)) {
2415                 return tevent_req_post(req, ev);
2416         }
2417         tevent_req_set_callback(subreq, tldap_modify_done, req);
2418         return req;
2419
2420   err:
2421
2422         tevent_req_ldap_error(req, TLDAP_ENCODING_ERROR);
2423         return tevent_req_post(req, ev);
2424 }
2425
2426 static void tldap_modify_done(struct tevent_req *subreq)
2427 {
2428         tldap_simple_done(subreq, TLDAP_RES_MODIFY);
2429 }
2430
2431 TLDAPRC tldap_modify_recv(struct tevent_req *req)
2432 {
2433         return tldap_simple_recv(req);
2434 }
2435
2436 TLDAPRC tldap_modify(struct tldap_context *ld, const char *dn,
2437                      struct tldap_mod *mods, int num_mods,
2438                      struct tldap_control *sctrls, int num_sctrls,
2439                      struct tldap_control *cctrls, int num_cctrls)
2440  {
2441         TALLOC_CTX *frame = talloc_stackframe();
2442         struct tevent_context *ev;
2443         struct tevent_req *req;
2444         TLDAPRC rc = TLDAP_NO_MEMORY;
2445
2446         ev = samba_tevent_context_init(frame);
2447         if (ev == NULL) {
2448                 goto fail;
2449         }
2450         req = tldap_modify_send(frame, ev, ld, dn, mods, num_mods,
2451                                 sctrls, num_sctrls, cctrls, num_cctrls);
2452         if (req == NULL) {
2453                 goto fail;
2454         }
2455         if (!tevent_req_poll(req, ev)) {
2456                 rc = TLDAP_OPERATIONS_ERROR;
2457                 goto fail;
2458         }
2459         rc = tldap_modify_recv(req);
2460         tldap_save_msg(ld, req);
2461  fail:
2462         TALLOC_FREE(frame);
2463         return rc;
2464 }
2465
2466 static void tldap_delete_done(struct tevent_req *subreq);
2467
2468 struct tevent_req *tldap_delete_send(TALLOC_CTX *mem_ctx,
2469                                      struct tevent_context *ev,
2470                                      struct tldap_context *ld,
2471                                      const char *dn,
2472                                      struct tldap_control *sctrls,
2473                                      int num_sctrls,
2474                                      struct tldap_control *cctrls,
2475                                      int num_cctrls)
2476 {
2477         struct tevent_req *req, *subreq;
2478         struct tldap_req_state *state;
2479
2480         req = tldap_req_create(mem_ctx, ld, &state);
2481         if (req == NULL) {
2482                 return NULL;
2483         }
2484
2485         if (!asn1_push_tag(state->out, TLDAP_REQ_DELETE)) goto err;
2486         if (!asn1_write(state->out, dn, strlen(dn))) goto err;
2487         if (!asn1_pop_tag(state->out)) goto err;
2488
2489         subreq = tldap_msg_send(state, ev, ld, state->id, state->out,
2490                                 sctrls, num_sctrls);
2491         if (tevent_req_nomem(subreq, req)) {
2492                 return tevent_req_post(req, ev);
2493         }
2494         tevent_req_set_callback(subreq, tldap_delete_done, req);
2495         return req;
2496
2497   err:
2498
2499         tevent_req_ldap_error(req, TLDAP_ENCODING_ERROR);
2500         return tevent_req_post(req, ev);
2501 }
2502
2503 static void tldap_delete_done(struct tevent_req *subreq)
2504 {
2505         tldap_simple_done(subreq, TLDAP_RES_DELETE);
2506 }
2507
2508 TLDAPRC tldap_delete_recv(struct tevent_req *req)
2509 {
2510         return tldap_simple_recv(req);
2511 }
2512
2513 TLDAPRC tldap_delete(struct tldap_context *ld, const char *dn,
2514                      struct tldap_control *sctrls, int num_sctrls,
2515                      struct tldap_control *cctrls, int num_cctrls)
2516 {
2517         TALLOC_CTX *frame = talloc_stackframe();
2518         struct tevent_context *ev;
2519         struct tevent_req *req;
2520         TLDAPRC rc = TLDAP_NO_MEMORY;
2521
2522         ev = samba_tevent_context_init(frame);
2523         if (ev == NULL) {
2524                 goto fail;
2525         }
2526         req = tldap_delete_send(frame, ev, ld, dn, sctrls, num_sctrls,
2527                                 cctrls, num_cctrls);
2528         if (req == NULL) {
2529                 goto fail;
2530         }
2531         if (!tevent_req_poll(req, ev)) {
2532                 rc = TLDAP_OPERATIONS_ERROR;
2533                 goto fail;
2534         }
2535         rc = tldap_delete_recv(req);
2536         tldap_save_msg(ld, req);
2537  fail:
2538         TALLOC_FREE(frame);
2539         return rc;
2540 }
2541
2542 int tldap_msg_id(const struct tldap_message *msg)
2543 {
2544         return msg->id;
2545 }
2546
2547 int tldap_msg_type(const struct tldap_message *msg)
2548 {
2549         return msg->type;
2550 }
2551
2552 const char *tldap_msg_matcheddn(struct tldap_message *msg)
2553 {
2554         if (msg == NULL) {
2555                 return NULL;
2556         }
2557         return msg->res_matcheddn;
2558 }
2559
2560 const char *tldap_msg_diagnosticmessage(struct tldap_message *msg)
2561 {
2562         if (msg == NULL) {
2563                 return NULL;
2564         }
2565         return msg->res_diagnosticmessage;
2566 }
2567
2568 const char *tldap_msg_referral(struct tldap_message *msg)
2569 {
2570         if (msg == NULL) {
2571                 return NULL;
2572         }
2573         return msg->res_referral;
2574 }
2575
2576 void tldap_msg_sctrls(struct tldap_message *msg, int *num_sctrls,
2577                       struct tldap_control **sctrls)
2578 {
2579         if (msg == NULL) {
2580                 *sctrls = NULL;
2581                 *num_sctrls = 0;
2582                 return;
2583         }
2584         *sctrls = msg->res_sctrls;
2585         *num_sctrls = talloc_array_length(msg->res_sctrls);
2586 }
2587
2588 struct tldap_message *tldap_ctx_lastmsg(struct tldap_context *ld)
2589 {
2590         return ld->last_msg;
2591 }
2592
2593 static const struct { TLDAPRC rc; const char *string; } tldaprc_errmap[] =
2594 {
2595         { TLDAP_SUCCESS,
2596           "TLDAP_SUCCESS" },
2597         { TLDAP_OPERATIONS_ERROR,
2598           "TLDAP_OPERATIONS_ERROR" },
2599         { TLDAP_PROTOCOL_ERROR,
2600           "TLDAP_PROTOCOL_ERROR" },
2601         { TLDAP_TIMELIMIT_EXCEEDED,
2602           "TLDAP_TIMELIMIT_EXCEEDED" },
2603         { TLDAP_SIZELIMIT_EXCEEDED,
2604           "TLDAP_SIZELIMIT_EXCEEDED" },
2605         { TLDAP_COMPARE_FALSE,
2606           "TLDAP_COMPARE_FALSE" },
2607         { TLDAP_COMPARE_TRUE,
2608           "TLDAP_COMPARE_TRUE" },
2609         { TLDAP_STRONG_AUTH_NOT_SUPPORTED,
2610           "TLDAP_STRONG_AUTH_NOT_SUPPORTED" },
2611         { TLDAP_STRONG_AUTH_REQUIRED,
2612           "TLDAP_STRONG_AUTH_REQUIRED" },
2613         { TLDAP_REFERRAL,
2614           "TLDAP_REFERRAL" },
2615         { TLDAP_ADMINLIMIT_EXCEEDED,
2616           "TLDAP_ADMINLIMIT_EXCEEDED" },
2617         { TLDAP_UNAVAILABLE_CRITICAL_EXTENSION,
2618           "TLDAP_UNAVAILABLE_CRITICAL_EXTENSION" },
2619         { TLDAP_CONFIDENTIALITY_REQUIRED,
2620           "TLDAP_CONFIDENTIALITY_REQUIRED" },
2621         { TLDAP_SASL_BIND_IN_PROGRESS,
2622           "TLDAP_SASL_BIND_IN_PROGRESS" },
2623         { TLDAP_NO_SUCH_ATTRIBUTE,
2624           "TLDAP_NO_SUCH_ATTRIBUTE" },
2625         { TLDAP_UNDEFINED_TYPE,
2626           "TLDAP_UNDEFINED_TYPE" },
2627         { TLDAP_INAPPROPRIATE_MATCHING,
2628           "TLDAP_INAPPROPRIATE_MATCHING" },
2629         { TLDAP_CONSTRAINT_VIOLATION,
2630           "TLDAP_CONSTRAINT_VIOLATION" },
2631         { TLDAP_TYPE_OR_VALUE_EXISTS,
2632           "TLDAP_TYPE_OR_VALUE_EXISTS" },
2633         { TLDAP_INVALID_SYNTAX,
2634           "TLDAP_INVALID_SYNTAX" },
2635         { TLDAP_NO_SUCH_OBJECT,
2636           "TLDAP_NO_SUCH_OBJECT" },
2637         { TLDAP_ALIAS_PROBLEM,
2638           "TLDAP_ALIAS_PROBLEM" },
2639         { TLDAP_INVALID_DN_SYNTAX,
2640           "TLDAP_INVALID_DN_SYNTAX" },
2641         { TLDAP_IS_LEAF,
2642           "TLDAP_IS_LEAF" },
2643         { TLDAP_ALIAS_DEREF_PROBLEM,
2644           "TLDAP_ALIAS_DEREF_PROBLEM" },
2645         { TLDAP_INAPPROPRIATE_AUTH,
2646           "TLDAP_INAPPROPRIATE_AUTH" },
2647         { TLDAP_INVALID_CREDENTIALS,
2648           "TLDAP_INVALID_CREDENTIALS" },
2649         { TLDAP_INSUFFICIENT_ACCESS,
2650           "TLDAP_INSUFFICIENT_ACCESS" },
2651         { TLDAP_BUSY,
2652           "TLDAP_BUSY" },
2653         { TLDAP_UNAVAILABLE,
2654           "TLDAP_UNAVAILABLE" },
2655         { TLDAP_UNWILLING_TO_PERFORM,
2656           "TLDAP_UNWILLING_TO_PERFORM" },
2657         { TLDAP_LOOP_DETECT,
2658           "TLDAP_LOOP_DETECT" },
2659         { TLDAP_NAMING_VIOLATION,
2660           "TLDAP_NAMING_VIOLATION" },
2661         { TLDAP_OBJECT_CLASS_VIOLATION,
2662           "TLDAP_OBJECT_CLASS_VIOLATION" },
2663         { TLDAP_NOT_ALLOWED_ON_NONLEAF,
2664           "TLDAP_NOT_ALLOWED_ON_NONLEAF" },
2665         { TLDAP_NOT_ALLOWED_ON_RDN,
2666           "TLDAP_NOT_ALLOWED_ON_RDN" },
2667         { TLDAP_ALREADY_EXISTS,
2668           "TLDAP_ALREADY_EXISTS" },
2669         { TLDAP_NO_OBJECT_CLASS_MODS,
2670           "TLDAP_NO_OBJECT_CLASS_MODS" },
2671         { TLDAP_RESULTS_TOO_LARGE,
2672           "TLDAP_RESULTS_TOO_LARGE" },
2673         { TLDAP_AFFECTS_MULTIPLE_DSAS,
2674           "TLDAP_AFFECTS_MULTIPLE_DSAS" },
2675         { TLDAP_OTHER,
2676           "TLDAP_OTHER" },
2677         { TLDAP_SERVER_DOWN,
2678           "TLDAP_SERVER_DOWN" },
2679         { TLDAP_LOCAL_ERROR,
2680           "TLDAP_LOCAL_ERROR" },
2681         { TLDAP_ENCODING_ERROR,
2682           "TLDAP_ENCODING_ERROR" },
2683         { TLDAP_DECODING_ERROR,
2684           "TLDAP_DECODING_ERROR" },
2685         { TLDAP_TIMEOUT,
2686           "TLDAP_TIMEOUT" },
2687         { TLDAP_AUTH_UNKNOWN,
2688           "TLDAP_AUTH_UNKNOWN" },
2689         { TLDAP_FILTER_ERROR,
2690           "TLDAP_FILTER_ERROR" },
2691         { TLDAP_USER_CANCELLED,
2692           "TLDAP_USER_CANCELLED" },
2693         { TLDAP_PARAM_ERROR,
2694           "TLDAP_PARAM_ERROR" },
2695         { TLDAP_NO_MEMORY,
2696           "TLDAP_NO_MEMORY" },
2697         { TLDAP_CONNECT_ERROR,
2698           "TLDAP_CONNECT_ERROR" },
2699         { TLDAP_NOT_SUPPORTED,
2700           "TLDAP_NOT_SUPPORTED" },
2701         { TLDAP_CONTROL_NOT_FOUND,
2702           "TLDAP_CONTROL_NOT_FOUND" },
2703         { TLDAP_NO_RESULTS_RETURNED,
2704           "TLDAP_NO_RESULTS_RETURNED" },
2705         { TLDAP_MORE_RESULTS_TO_RETURN,
2706           "TLDAP_MORE_RESULTS_TO_RETURN" },
2707         { TLDAP_CLIENT_LOOP,
2708           "TLDAP_CLIENT_LOOP" },
2709         { TLDAP_REFERRAL_LIMIT_EXCEEDED,
2710           "TLDAP_REFERRAL_LIMIT_EXCEEDED" },
2711 };
2712
2713 const char *tldap_rc2string(TLDAPRC rc)
2714 {
2715         size_t i;
2716
2717         for (i=0; i<ARRAY_SIZE(tldaprc_errmap); i++) {
2718                 if (TLDAP_RC_EQUAL(rc, tldaprc_errmap[i].rc)) {
2719                         return tldaprc_errmap[i].string;
2720                 }
2721         }
2722
2723         return "Unknown LDAP Error";
2724 }