lib/ldb/common/ldb_ldif.c

   1 /*
   2    ldb database library
   3
   4    Copyright (C) Andrew Tridgell  2004
   5
   6      ** NOTE! The following LGPL license applies to the ldb
   7      ** library. This does NOT imply that all of Samba is released
   8      ** under the LGPL
   9
  10    This library is free software; you can redistribute it and/or
  11    modify it under the terms of the GNU Lesser General Public
  12    License as published by the Free Software Foundation; either
  13    version 3 of the License, or (at your option) any later version.
  14
  15    This library is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18    Lesser General Public License for more details.
  19
  20    You should have received a copy of the GNU Lesser General Public
  21    License along with this library; if not, see <http://www.gnu.org/licenses/>.
  22 */
  23
  24 /*
  25  *  Name: ldb
  26  *
  27  *  Component: ldif routines
  28  *
  29  *  Description: ldif pack/unpack routines
  30  *
  31  *  Author: Andrew Tridgell
  32  */
  33
  34 /*
  35   see RFC2849 for the LDIF format definition
  36 */
  37
  38 #include "ldb_private.h"
  39 #include "system/locale.h"
  40
  41 /*
  42
  43 */
  44 static int ldb_read_data_file(TALLOC_CTX *mem_ctx, struct ldb_val *value)
  45 {
  46         struct stat statbuf;
  47         char *buf;
  48         int count, size, bytes;
  49         int ret;
  50         int f;
  51         const char *fname = (const char *)value->data;
  52
  53         if (strncmp(fname, "file://", 7) != 0) {
  54                 return LDB_ERR_INVALID_ATTRIBUTE_SYNTAX;
  55         }
  56         fname += 7;
  57
  58         f = open(fname, O_RDONLY);
  59         if (f == -1) {
  60                 return -1;
  61         }
  62
  63         if (fstat(f, &statbuf) != 0) {
  64                 ret = -1;
  65                 goto done;
  66         }
  67
  68         if (statbuf.st_size == 0) {
  69                 ret = -1;
  70                 goto done;
  71         }
  72
  73         value->data = (uint8_t *)talloc_size(mem_ctx, statbuf.st_size + 1);
  74         if (value->data == NULL) {
  75                 ret = -1;
  76                 goto done;
  77         }
  78         value->data[statbuf.st_size] = 0;
  79
  80         count = 0;
  81         size = statbuf.st_size;
  82         buf = (char *)value->data;
  83         while (count < statbuf.st_size) {
  84                 bytes = read(f, buf, size);
  85                 if (bytes == -1) {
  86                         talloc_free(value->data);
  87                         ret = -1;
  88                         goto done;
  89                 }
  90                 count += bytes;
  91                 buf += bytes;
  92                 size -= bytes;
  93         }
  94
  95         value->length = statbuf.st_size;
  96         ret = statbuf.st_size;
  97
  98 done:
  99         close(f);
 100         return ret;
 101 }
 102
 103 /*
 104   this base64 decoder was taken from jitterbug (written by tridge).
 105   we might need to replace it with a new version
 106 */
 107 int ldb_base64_decode(char *s)
 108 {
 109         const char *b64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
 110         int bit_offset=0, byte_offset, idx, i, n;
 111         uint8_t *d = (uint8_t *)s;
 112         char *p=NULL;
 113
 114         n=i=0;
 115
 116         while (*s && (p=strchr(b64,*s))) {
 117                 idx = (int)(p - b64);
 118                 byte_offset = (i*6)/8;
 119                 bit_offset = (i*6)%8;
 120                 d[byte_offset] &= ~((1<<(8-bit_offset))-1);
 121                 if (bit_offset < 3) {
 122                         d[byte_offset] |= (idx << (2-bit_offset));
 123                         n = byte_offset+1;
 124                 } else {
 125                         d[byte_offset] |= (idx >> (bit_offset-2));
 126                         d[byte_offset+1] = 0;
 127                         d[byte_offset+1] |= (idx << (8-(bit_offset-2))) & 0xFF;
 128                         n = byte_offset+2;
 129                 }
 130                 s++; i++;
 131         }
 132         if (bit_offset >= 3) {
 133                 n--;
 134         }
 135
 136         if (*s && !p) {
 137                 /* the only termination allowed */
 138                 if (*s != '=') {
 139                         return -1;
 140                 }
 141         }
 142
 143         /* null terminate */
 144         d[n] = 0;
 145         return n;
 146 }
 147
 148
 149 /*
 150   encode as base64
 151   caller frees
 152 */
 153 char *ldb_base64_encode(TALLOC_CTX *mem_ctx, const char *buf, int len)
 154 {
 155         const char *b64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
 156         int bit_offset, byte_offset, idx, i;
 157         const uint8_t *d = (const uint8_t *)buf;
 158         int bytes = (len*8 + 5)/6, pad_bytes = (bytes % 4) ? 4 - (bytes % 4) : 0;
 159         char *out;
 160
 161         out = talloc_array(mem_ctx, char, bytes+pad_bytes+1);
 162         if (!out) return NULL;
 163
 164         for (i=0;i<bytes;i++) {
 165                 byte_offset = (i*6)/8;
 166                 bit_offset = (i*6)%8;
 167                 if (bit_offset < 3) {
 168                         idx = (d[byte_offset] >> (2-bit_offset)) & 0x3F;
 169                 } else {
 170                         idx = (d[byte_offset] << (bit_offset-2)) & 0x3F;
 171                         if (byte_offset+1 < len) {
 172                                 idx |= (d[byte_offset+1] >> (8-(bit_offset-2)));
 173                         }
 174                 }
 175                 out[i] = b64[idx];
 176         }
 177
 178         for (;i<bytes+pad_bytes;i++)
 179                 out[i] = '=';
 180         out[i] = 0;
 181
 182         return out;
 183 }
 184
 185 /*
 186   see if a buffer should be base64 encoded
 187 */
 188 int ldb_should_b64_encode(struct ldb_context *ldb, const struct ldb_val *val)
 189 {
 190         unsigned int i;
 191         uint8_t *p = val->data;
 192
 193         if (val->length == 0) {
 194                 return 0;
 195         }
 196
 197         if (p[0] == ' ' || p[0] == ':') {
 198                 return 1;
 199         }
 200
 201         for (i=0; i<val->length; i++) {
 202                 if (!isprint(p[i]) || p[i] == '\n') {
 203                         return 1;
 204                 }
 205         }
 206         return 0;
 207 }
 208
 209 /* this macro is used to handle the return checking on fprintf_fn() */
 210 #define CHECK_RET do { if (ret < 0) return ret; total += ret; } while (0)
 211
 212 /*
 213   write a line folded string onto a file
 214 */
 215 static int fold_string(int (*fprintf_fn)(void *, const char *, ...), void *private_data,
 216                         const char *buf, size_t length, int start_pos)
 217 {
 218         size_t i;
 219         int total=0, ret;
 220
 221         for (i=0;i<length;i++) {
 222                 ret = fprintf_fn(private_data, "%c", buf[i]);
 223                 CHECK_RET;
 224                 if (i != (length-1) && (i + start_pos) % 77 == 0) {
 225                         ret = fprintf_fn(private_data, "\n ");
 226                         CHECK_RET;
 227                 }
 228         }
 229
 230         return total;
 231 }
 232
 233 #undef CHECK_RET
 234
 235 /*
 236   encode as base64 to a file
 237 */
 238 static int base64_encode_f(struct ldb_context *ldb,
 239                            int (*fprintf_fn)(void *, const char *, ...),
 240                            void *private_data,
 241                            const char *buf, int len, int start_pos)
 242 {
 243         char *b = ldb_base64_encode(ldb, buf, len);
 244         int ret;
 245
 246         if (!b) {
 247                 return -1;
 248         }
 249
 250         ret = fold_string(fprintf_fn, private_data, b, strlen(b), start_pos);
 251
 252         talloc_free(b);
 253         return ret;
 254 }
 255
 256
 257 static const struct {
 258         const char *name;
 259         enum ldb_changetype changetype;
 260 } ldb_changetypes[] = {
 261         {"add",    LDB_CHANGETYPE_ADD},
 262         {"delete", LDB_CHANGETYPE_DELETE},
 263         {"modify", LDB_CHANGETYPE_MODIFY},
 264         {"modrdn", LDB_CHANGETYPE_MODRDN},
 265         {"moddn",  LDB_CHANGETYPE_MODRDN},
 266         {NULL, 0}
 267 };
 268
 269 /* this macro is used to handle the return checking on fprintf_fn() */
 270 #define CHECK_RET do { if (ret < 0) { talloc_free(mem_ctx); return ret; } total += ret; } while (0)
 271
 272 /*
 273   write to ldif, using a caller supplied write method, and only printing secrets if we are not in a trace
 274 */
 275 static int ldb_ldif_write_trace(struct ldb_context *ldb,
 276                                 int (*fprintf_fn)(void *, const char *, ...),
 277                                 void *private_data,
 278                                 const struct ldb_ldif *ldif,
 279                                 bool in_trace)
 280 {
 281         TALLOC_CTX *mem_ctx;
 282         unsigned int i, j;
 283         int total=0, ret;
 284         char *p;
 285         const struct ldb_message *msg;
 286         const char * const * secret_attributes = ldb_get_opaque(ldb, LDB_SECRET_ATTRIBUTE_LIST_OPAQUE);
 287
 288         mem_ctx = talloc_named_const(NULL, 0, "ldb_ldif_write");
 289
 290         msg = ldif->msg;
 291         p = ldb_dn_get_extended_linearized(mem_ctx, msg->dn, 1);
 292         ret = fprintf_fn(private_data, "dn: %s\n", p);
 293         talloc_free(p);
 294         CHECK_RET;
 295
 296         if (ldif->changetype != LDB_CHANGETYPE_NONE) {
 297                 for (i=0;ldb_changetypes[i].name;i++) {
 298                         if (ldb_changetypes[i].changetype == ldif->changetype) {
 299                                 break;
 300                         }
 301                 }
 302                 if (!ldb_changetypes[i].name) {
 303                         ldb_debug(ldb, LDB_DEBUG_ERROR, "Error: Invalid ldif changetype %d",
 304                                   ldif->changetype);
 305                         talloc_free(mem_ctx);
 306                         return -1;
 307                 }
 308                 ret = fprintf_fn(private_data, "changetype: %s\n", ldb_changetypes[i].name);
 309                 CHECK_RET;
 310         }
 311
 312         for (i=0;i<msg->num_elements;i++) {
 313                 const struct ldb_schema_attribute *a;
 314
 315                 a = ldb_schema_attribute_by_name(ldb, msg->elements[i].name);
 316
 317                 if (ldif->changetype == LDB_CHANGETYPE_MODIFY) {
 318                         switch (msg->elements[i].flags & LDB_FLAG_MOD_MASK) {
 319                         case LDB_FLAG_MOD_ADD:
 320                                 fprintf_fn(private_data, "add: %s\n",
 321                                            msg->elements[i].name);
 322                                 break;
 323                         case LDB_FLAG_MOD_DELETE:
 324                                 fprintf_fn(private_data, "delete: %s\n",
 325                                            msg->elements[i].name);
 326                                 break;
 327                         case LDB_FLAG_MOD_REPLACE:
 328                                 fprintf_fn(private_data, "replace: %s\n",
 329                                            msg->elements[i].name);
 330                                 break;
 331                         }
 332                 }
 333
 334                 if (in_trace && secret_attributes && ldb_attr_in_list(secret_attributes, msg->elements[i].name)) {
 335                         /* Deliberatly skip printing this password */
 336                         ret = fprintf_fn(private_data, "# %s::: REDACTED SECRET ATTRIBUTE\n",
 337                                          msg->elements[i].name);
 338                         CHECK_RET;
 339                         continue;
 340                 }
 341
 342                 for (j=0;j<msg->elements[i].num_values;j++) {
 343                         struct ldb_val v;
 344                         bool use_b64_encode;
 345                         ret = a->syntax->ldif_write_fn(ldb, mem_ctx, &msg->elements[i].values[j], &v);
 346                         if (ret != LDB_SUCCESS) {
 347                                 v = msg->elements[i].values[j];
 348                         }
 349                         use_b64_encode = !(ldb->flags & LDB_FLG_SHOW_BINARY)
 350                                         && ldb_should_b64_encode(ldb, &v);
 351                         if (ret != LDB_SUCCESS || use_b64_encode) {
 352                                 ret = fprintf_fn(private_data, "%s:: ",
 353                                                  msg->elements[i].name);
 354                                 CHECK_RET;
 355                                 ret = base64_encode_f(ldb, fprintf_fn, private_data,
 356                                                       (char *)v.data, v.length,
 357                                                       strlen(msg->elements[i].name)+3);
 358                                 CHECK_RET;
 359                                 ret = fprintf_fn(private_data, "\n");
 360                                 CHECK_RET;
 361                         } else {
 362                                 ret = fprintf_fn(private_data, "%s: ", msg->elements[i].name);
 363                                 CHECK_RET;
 364                                 if (ldb->flags & LDB_FLG_SHOW_BINARY) {
 365                                         ret = fprintf_fn(private_data, "%*.*s",
 366                                                          v.length, v.length, (char *)v.data);
 367                                 } else {
 368                                         ret = fold_string(fprintf_fn, private_data,
 369                                                           (char *)v.data, v.length,
 370                                                           strlen(msg->elements[i].name)+2);
 371                                 }
 372                                 CHECK_RET;
 373                                 ret = fprintf_fn(private_data, "\n");
 374                                 CHECK_RET;
 375                         }
 376                         if (v.data != msg->elements[i].values[j].data) {
 377                                 talloc_free(v.data);
 378                         }
 379                 }
 380                 if (ldif->changetype == LDB_CHANGETYPE_MODIFY) {
 381                         fprintf_fn(private_data, "-\n");
 382                 }
 383         }
 384         ret = fprintf_fn(private_data,"\n");
 385         CHECK_RET;
 386
 387         talloc_free(mem_ctx);
 388
 389         return total;
 390 }
 391
 392 #undef CHECK_RET
 393
 394
 395 /*
 396   write to ldif, using a caller supplied write method
 397 */
 398 int ldb_ldif_write(struct ldb_context *ldb,
 399                    int (*fprintf_fn)(void *, const char *, ...),
 400                    void *private_data,
 401                    const struct ldb_ldif *ldif)
 402 {
 403         return ldb_ldif_write_trace(ldb, fprintf_fn, private_data, ldif, false);
 404 }
 405
 406
 407 /*
 408   pull a ldif chunk, which is defined as a piece of data ending in \n\n or EOF
 409   this routine removes any RFC2849 continuations and comments
 410
 411   caller frees
 412 */
 413 static char *next_chunk(struct ldb_context *ldb,
 414                         int (*fgetc_fn)(void *), void *private_data)
 415 {
 416         size_t alloc_size=0, chunk_size = 0;
 417         char *chunk = NULL;
 418         int c;
 419         int in_comment = 0;
 420
 421         while ((c = fgetc_fn(private_data)) != EOF) {
 422                 if (chunk_size+1 >= alloc_size) {
 423                         char *c2;
 424                         alloc_size += 1024;
 425                         c2 = talloc_realloc(ldb, chunk, char, alloc_size);
 426                         if (!c2) {
 427                                 talloc_free(chunk);
 428                                 errno = ENOMEM;
 429                                 return NULL;
 430                         }
 431                         chunk = c2;
 432                 }
 433
 434                 if (in_comment) {
 435                         if (c == '\n') {
 436                                 in_comment = 0;
 437                         }
 438                         continue;
 439                 }
 440
 441                 /* handle continuation lines - see RFC2849 */
 442                 if (c == ' ' && chunk_size > 1 && chunk[chunk_size-1] == '\n') {
 443                         chunk_size--;
 444                         continue;
 445                 }
 446
 447                 /* chunks are terminated by a double line-feed */
 448                 if (c == '\n' && chunk_size > 0 && chunk[chunk_size-1] == '\n') {
 449                         chunk[chunk_size-1] = 0;
 450                         return chunk;
 451                 }
 452
 453                 if (c == '#' && (chunk_size == 0 || chunk[chunk_size-1] == '\n')) {
 454                         in_comment = 1;
 455                         continue;
 456                 }
 457
 458                 /* ignore leading blank lines */
 459                 if (chunk_size == 0 && c == '\n') {
 460                         continue;
 461                 }
 462
 463                 chunk[chunk_size++] = c;
 464         }
 465
 466         if (chunk) {
 467                 chunk[chunk_size] = 0;
 468         }
 469
 470         return chunk;
 471 }
 472
 473
 474 /* simple ldif attribute parser */
 475 static int next_attr(TALLOC_CTX *mem_ctx, char **s, const char **attr, struct ldb_val *value)
 476 {
 477         char *p;
 478         int base64_encoded = 0;
 479         int binary_file = 0;
 480
 481         if (strncmp(*s, "-\n", 2) == 0) {
 482                 value->length = 0;
 483                 *attr = "-";
 484                 *s += 2;
 485                 return 0;
 486         }
 487
 488         p = strchr(*s, ':');
 489         if (!p) {
 490                 return -1;
 491         }
 492
 493         *p++ = 0;
 494
 495         if (*p == ':') {
 496                 base64_encoded = 1;
 497                 p++;
 498         }
 499
 500         if (*p == '<') {
 501                 binary_file = 1;
 502                 p++;
 503         }
 504
 505         *attr = *s;
 506
 507         while (*p == ' ' || *p == '\t') {
 508                 p++;
 509         }
 510
 511         value->data = (uint8_t *)p;
 512
 513         p = strchr(p, '\n');
 514
 515         if (!p) {
 516                 value->length = strlen((char *)value->data);
 517                 *s = ((char *)value->data) + value->length;
 518         } else {
 519                 value->length = p - (char *)value->data;
 520                 *s = p+1;
 521                 *p = 0;
 522         }
 523
 524         if (base64_encoded) {
 525                 int len = ldb_base64_decode((char *)value->data);
 526                 if (len == -1) {
 527                         /* it wasn't valid base64 data */
 528                         return -1;
 529                 }
 530                 value->length = len;
 531         }
 532
 533         if (binary_file) {
 534                 int len = ldb_read_data_file(mem_ctx, value);
 535                 if (len == -1) {
 536                         /* an error occurred while trying to retrieve the file */
 537                         return -1;
 538                 }
 539         }
 540
 541         return 0;
 542 }
 543
 544
 545 /*
 546   free a message from a ldif_read
 547 */
 548 void ldb_ldif_read_free(struct ldb_context *ldb, struct ldb_ldif *ldif)
 549 {
 550         talloc_free(ldif);
 551 }
 552
 553 int ldb_ldif_parse_modrdn(struct ldb_context *ldb,
 554                           const struct ldb_ldif *ldif,
 555                           TALLOC_CTX *mem_ctx,
 556                           struct ldb_dn **_olddn,
 557                           struct ldb_dn **_newrdn,
 558                           bool *_deleteoldrdn,
 559                           struct ldb_dn **_newsuperior,
 560                           struct ldb_dn **_newdn)
 561 {
 562         struct ldb_message *msg = ldif->msg;
 563         struct ldb_val *newrdn_val = NULL;
 564         struct ldb_val *deleteoldrdn_val = NULL;
 565         struct ldb_val *newsuperior_val = NULL;
 566         struct ldb_dn *olddn = NULL;
 567         struct ldb_dn *newrdn = NULL;
 568         bool deleteoldrdn = true;
 569         struct ldb_dn *newsuperior = NULL;
 570         struct ldb_dn *newdn = NULL;
 571         struct ldb_val tmp_false;
 572         struct ldb_val tmp_true;
 573         bool ok;
 574         TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
 575
 576         if (tmp_ctx == NULL) {
 577                 ldb_debug(ldb, LDB_DEBUG_FATAL,
 578                           "Error: talloc_new() failed");
 579                 goto err_op;
 580         }
 581
 582         if (ldif->changetype != LDB_CHANGETYPE_MODRDN) {
 583                 ldb_debug(ldb, LDB_DEBUG_ERROR,
 584                           "Error: invalid changetype '%d'",
 585                           ldif->changetype);
 586                 goto err_other;
 587         }
 588
 589         if (msg->num_elements < 2) {
 590                 ldb_debug(ldb, LDB_DEBUG_ERROR,
 591                           "Error: num_elements[%u] < 2",
 592                           msg->num_elements);
 593                 goto err_other;
 594         }
 595
 596         if (msg->num_elements > 3) {
 597                 ldb_debug(ldb, LDB_DEBUG_ERROR,
 598                           "Error: num_elements[%u] > 3",
 599                           msg->num_elements);
 600                 goto err_other;
 601         }
 602
 603 #define CHECK_ELEMENT(i, _name, v, needed) do { \
 604         v = NULL; \
 605         if (msg->num_elements < (i + 1)) { \
 606                 if (needed) { \
 607                         ldb_debug(ldb, LDB_DEBUG_ERROR, \
 608                                   "Error: num_elements[%u] < (%u + 1)", \
 609                                   msg->num_elements, i); \
 610                         goto err_other; \
 611                 } \
 612         } else if (ldb_attr_cmp(msg->elements[i].name, _name) != 0) { \
 613                 ldb_debug(ldb, LDB_DEBUG_ERROR, \
 614                           "Error: elements[%u].name[%s] != [%s]", \
 615                           i, msg->elements[i].name, _name); \
 616                 goto err_other; \
 617         } else if (msg->elements[i].flags != 0) { \
 618                 ldb_debug(ldb, LDB_DEBUG_ERROR, \
 619                           "Error: elements[%u].flags[0x%X} != [0x0]", \
 620                           i, msg->elements[i].flags); \
 621                 goto err_other; \
 622         } else if (msg->elements[i].num_values != 1) { \
 623                 ldb_debug(ldb, LDB_DEBUG_ERROR, \
 624                           "Error: elements[%u].num_values[%u] != 1", \
 625                           i, msg->elements[i].num_values); \
 626                 goto err_other; \
 627         } else { \
 628                 v = &msg->elements[i].values[0]; \
 629         } \
 630 } while (0)
 631
 632         CHECK_ELEMENT(0, "newrdn", newrdn_val, true);
 633         CHECK_ELEMENT(1, "deleteoldrdn", deleteoldrdn_val, true);
 634         CHECK_ELEMENT(2, "newsuperior", newsuperior_val, false);
 635
 636 #undef CHECK_ELEMENT
 637
 638         olddn = ldb_dn_copy(tmp_ctx, msg->dn);
 639         if (olddn == NULL) {
 640                 ldb_debug(ldb, LDB_DEBUG_ERROR,
 641                           "Error: failed to copy olddn '%s'",
 642                           ldb_dn_get_linearized(msg->dn));
 643                 goto err_op;
 644         }
 645
 646         newrdn = ldb_dn_from_ldb_val(tmp_ctx, ldb, newrdn_val);
 647         if (!ldb_dn_validate(newrdn)) {
 648                 ldb_debug(ldb, LDB_DEBUG_ERROR,
 649                           "Error: Unable to parse dn '%s'",
 650                           (char *)newrdn_val->data);
 651                 goto err_dn;
 652         }
 653
 654         tmp_false.length = 1;
 655         tmp_false.data = discard_const_p(uint8_t, "0");
 656         tmp_true.length = 1;
 657         tmp_true.data = discard_const_p(uint8_t, "1");
 658         if (ldb_val_equal_exact(deleteoldrdn_val, &tmp_false) == 1) {
 659                 deleteoldrdn = false;
 660         } else if (ldb_val_equal_exact(deleteoldrdn_val, &tmp_true) == 1) {
 661                 deleteoldrdn = true;
 662         } else {
 663                 ldb_debug(ldb, LDB_DEBUG_ERROR,
 664                           "Error: deleteoldrdn value invalid '%s' not '0'/'1'",
 665                           (char *)deleteoldrdn_val->data);
 666                 goto err_attr;
 667         }
 668
 669         if (newsuperior_val) {
 670                 newsuperior = ldb_dn_from_ldb_val(tmp_ctx, ldb, newsuperior_val);
 671                 if (!ldb_dn_validate(newsuperior)) {
 672                         ldb_debug(ldb, LDB_DEBUG_ERROR,
 673                                   "Error: Unable to parse dn '%s'",
 674                                   (char *)newsuperior_val->data);
 675                         goto err_dn;
 676                 }
 677         } else {
 678                 newsuperior = ldb_dn_get_parent(tmp_ctx, msg->dn);
 679                 if (newsuperior == NULL) {
 680                         ldb_debug(ldb, LDB_DEBUG_ERROR,
 681                                   "Error: Unable to get parent dn '%s'",
 682                                   ldb_dn_get_linearized(msg->dn));
 683                         goto err_dn;
 684                 }
 685         }
 686
 687         newdn = ldb_dn_copy(tmp_ctx, newrdn);
 688         if (newdn == NULL) {
 689                 ldb_debug(ldb, LDB_DEBUG_ERROR,
 690                           "Error: failed to copy newrdn '%s'",
 691                           ldb_dn_get_linearized(newrdn));
 692                 goto err_op;
 693         }
 694
 695         ok = ldb_dn_add_base(newdn, newsuperior);
 696         if (!ok) {
 697                 ldb_debug(ldb, LDB_DEBUG_ERROR,
 698                           "Error: failed to base '%s' to newdn '%s'",
 699                           ldb_dn_get_linearized(newsuperior),
 700                           ldb_dn_get_linearized(newdn));
 701                 goto err_op;
 702         }
 703
 704         if (_olddn) {
 705                 *_olddn = talloc_move(mem_ctx, &olddn);
 706         }
 707         if (_newrdn) {
 708                 *_newrdn = talloc_move(mem_ctx, &newrdn);
 709         }
 710         if (_deleteoldrdn) {
 711                 *_deleteoldrdn = deleteoldrdn;
 712         }
 713         if (_newsuperior) {
 714                 if (newsuperior_val) {
 715                         *_newrdn = talloc_move(mem_ctx, &newrdn);
 716                 } else {
 717                         *_newrdn = NULL;
 718                 }
 719         }
 720         if (_newdn) {
 721                 *_newdn = talloc_move(mem_ctx, &newdn);
 722         }
 723
 724         talloc_free(tmp_ctx);
 725         return LDB_SUCCESS;
 726 err_other:
 727         talloc_free(tmp_ctx);
 728         return LDB_ERR_OTHER;
 729 err_op:
 730         talloc_free(tmp_ctx);
 731         return LDB_ERR_OPERATIONS_ERROR;
 732 err_attr:
 733         talloc_free(tmp_ctx);
 734         return LDB_ERR_INVALID_ATTRIBUTE_SYNTAX;
 735 err_dn:
 736         talloc_free(tmp_ctx);
 737         return LDB_ERR_INVALID_DN_SYNTAX;
 738 }
 739
 740 /*
 741  read from a LDIF source, creating a ldb_message
 742 */
 743 struct ldb_ldif *ldb_ldif_read(struct ldb_context *ldb,
 744                                int (*fgetc_fn)(void *), void *private_data)
 745 {
 746         struct ldb_ldif *ldif;
 747         struct ldb_message *msg;
 748         const char *attr=NULL;
 749         char *chunk=NULL, *s;
 750         struct ldb_val value;
 751         unsigned flags = 0;
 752         value.data = NULL;
 753
 754         ldif = talloc(ldb, struct ldb_ldif);
 755         if (!ldif) return NULL;
 756
 757         ldif->msg = talloc(ldif, struct ldb_message);
 758         if (ldif->msg == NULL) {
 759                 talloc_free(ldif);
 760                 return NULL;
 761         }
 762
 763         ldif->changetype = LDB_CHANGETYPE_NONE;
 764         msg = ldif->msg;
 765
 766         msg->dn = NULL;
 767         msg->elements = NULL;
 768         msg->num_elements = 0;
 769
 770         chunk = next_chunk(ldb, fgetc_fn, private_data);
 771         if (!chunk) {
 772                 goto failed;
 773         }
 774         talloc_steal(ldif, chunk);
 775
 776         s = chunk;
 777
 778         if (next_attr(ldif, &s, &attr, &value) != 0) {
 779                 goto failed;
 780         }
 781
 782         /* first line must be a dn */
 783         if (ldb_attr_cmp(attr, "dn") != 0) {
 784                 ldb_debug(ldb, LDB_DEBUG_ERROR, "Error: First line of ldif must be a dn not '%s'",
 785                           attr);
 786                 goto failed;
 787         }
 788
 789         msg->dn = ldb_dn_from_ldb_val(msg, ldb, &value);
 790
 791         if ( ! ldb_dn_validate(msg->dn)) {
 792                 ldb_debug(ldb, LDB_DEBUG_ERROR, "Error: Unable to parse dn '%s'",
 793                           (char *)value.data);
 794                 goto failed;
 795         }
 796
 797         while (next_attr(ldif, &s, &attr, &value) == 0) {
 798                 const struct ldb_schema_attribute *a;
 799                 struct ldb_message_element *el;
 800                 int ret, empty = 0;
 801
 802                 if (ldb_attr_cmp(attr, "changetype") == 0) {
 803                         int i;
 804                         for (i=0;ldb_changetypes[i].name;i++) {
 805                                 if (ldb_attr_cmp((char *)value.data, ldb_changetypes[i].name) == 0) {
 806                                         ldif->changetype = ldb_changetypes[i].changetype;
 807                                         break;
 808                                 }
 809                         }
 810                         if (!ldb_changetypes[i].name) {
 811                                 ldb_debug(ldb, LDB_DEBUG_ERROR,
 812                                           "Error: Bad ldif changetype '%s'",(char *)value.data);
 813                         }
 814                         flags = 0;
 815                         continue;
 816                 }
 817
 818                 if (ldb_attr_cmp(attr, "add") == 0) {
 819                         flags = LDB_FLAG_MOD_ADD;
 820                         empty = 1;
 821                 }
 822                 if (ldb_attr_cmp(attr, "delete") == 0) {
 823                         flags = LDB_FLAG_MOD_DELETE;
 824                         empty = 1;
 825                 }
 826                 if (ldb_attr_cmp(attr, "replace") == 0) {
 827                         flags = LDB_FLAG_MOD_REPLACE;
 828                         empty = 1;
 829                 }
 830                 if (ldb_attr_cmp(attr, "-") == 0) {
 831                         flags = 0;
 832                         continue;
 833                 }
 834
 835                 if (empty) {
 836                         if (ldb_msg_add_empty(msg, (char *)value.data, flags, NULL) != 0) {
 837                                 goto failed;
 838                         }
 839                         continue;
 840                 }
 841
 842                 el = &msg->elements[msg->num_elements-1];
 843
 844                 a = ldb_schema_attribute_by_name(ldb, attr);
 845
 846                 if (msg->num_elements > 0 && ldb_attr_cmp(attr, el->name) == 0 &&
 847                     flags == el->flags) {
 848                         /* its a continuation */
 849                         el->values =
 850                                 talloc_realloc(msg->elements, el->values,
 851                                                  struct ldb_val, el->num_values+1);
 852                         if (!el->values) {
 853                                 goto failed;
 854                         }
 855                         ret = a->syntax->ldif_read_fn(ldb, el->values, &value, &el->values[el->num_values]);
 856                         if (ret != 0) {
 857                                 goto failed;
 858                         }
 859                         if (value.length == 0) {
 860                                 ldb_debug(ldb, LDB_DEBUG_ERROR,
 861                                           "Error: Attribute value cannot be empty for attribute '%s'", el->name);
 862                                 goto failed;
 863                         }
 864                         if (value.data != el->values[el->num_values].data) {
 865                                 talloc_steal(el->values, el->values[el->num_values].data);
 866                         }
 867                         el->num_values++;
 868                 } else {
 869                         /* its a new attribute */
 870                         msg->elements = talloc_realloc(msg, msg->elements,
 871                                                          struct ldb_message_element,
 872                                                          msg->num_elements+1);
 873                         if (!msg->elements) {
 874                                 goto failed;
 875                         }
 876                         el = &msg->elements[msg->num_elements];
 877                         el->flags = flags;
 878                         el->name = talloc_strdup(msg->elements, attr);
 879                         el->values = talloc(msg->elements, struct ldb_val);
 880                         if (!el->values || !el->name) {
 881                                 goto failed;
 882                         }
 883                         el->num_values = 1;
 884                         ret = a->syntax->ldif_read_fn(ldb, el->values, &value, &el->values[0]);
 885                         if (ret != 0) {
 886                                 goto failed;
 887                         }
 888                         if (value.data != el->values[0].data) {
 889                                 talloc_steal(el->values, el->values[0].data);
 890                         }
 891                         msg->num_elements++;
 892                 }
 893         }
 894
 895         if (ldif->changetype == LDB_CHANGETYPE_MODRDN) {
 896                 int ret;
 897
 898                 ret = ldb_ldif_parse_modrdn(ldb, ldif, ldif,
 899                                             NULL, NULL, NULL, NULL, NULL);
 900                 if (ret != LDB_SUCCESS) {
 901                         goto failed;
 902                 }
 903         }
 904
 905         return ldif;
 906
 907 failed:
 908         talloc_free(ldif);
 909         return NULL;
 910 }
 911
 912
 913
 914 /*
 915   a wrapper around ldif_read() for reading from FILE*
 916 */
 917
 918 static int fgetc_file(void *private_data)
 919 {
 920         int c;
 921         struct ldif_read_file_state *state =
 922                 (struct ldif_read_file_state *)private_data;
 923         c = fgetc(state->f);
 924         if (c == '\n') {
 925                 state->line_no++;
 926         }
 927         return c;
 928 }
 929
 930 struct ldb_ldif *ldb_ldif_read_file_state(struct ldb_context *ldb,
 931                                           struct ldif_read_file_state *state)
 932 {
 933         return ldb_ldif_read(ldb, fgetc_file, state);
 934 }
 935
 936 struct ldb_ldif *ldb_ldif_read_file(struct ldb_context *ldb, FILE *f)
 937 {
 938         struct ldif_read_file_state state;
 939         state.f = f;
 940         return ldb_ldif_read_file_state(ldb, &state);
 941 }
 942
 943 /*
 944   a wrapper around ldif_read() for reading from const char*
 945 */
 946 struct ldif_read_string_state {
 947         const char *s;
 948 };
 949
 950 static int fgetc_string(void *private_data)
 951 {
 952         struct ldif_read_string_state *state =
 953                 (struct ldif_read_string_state *)private_data;
 954         if (state->s[0] != 0) {
 955                 return *state->s++;
 956         }
 957         return EOF;
 958 }
 959
 960 struct ldb_ldif *ldb_ldif_read_string(struct ldb_context *ldb, const char **s)
 961 {
 962         struct ldif_read_string_state state;
 963         struct ldb_ldif *ldif;
 964         state.s = *s;
 965         ldif = ldb_ldif_read(ldb, fgetc_string, &state);
 966         *s = state.s;
 967         return ldif;
 968 }
 969
 970
 971 /*
 972   wrapper around ldif_write() for a file
 973 */
 974 struct ldif_write_file_state {
 975         FILE *f;
 976 };
 977
 978 static int fprintf_file(void *private_data, const char *fmt, ...) PRINTF_ATTRIBUTE(2, 3);
 979
 980 static int fprintf_file(void *private_data, const char *fmt, ...)
 981 {
 982         struct ldif_write_file_state *state =
 983                 (struct ldif_write_file_state *)private_data;
 984         int ret;
 985         va_list ap;
 986
 987         va_start(ap, fmt);
 988         ret = vfprintf(state->f, fmt, ap);
 989         va_end(ap);
 990         return ret;
 991 }
 992
 993 int ldb_ldif_write_file(struct ldb_context *ldb, FILE *f, const struct ldb_ldif *ldif)
 994 {
 995         struct ldif_write_file_state state;
 996         state.f = f;
 997         return ldb_ldif_write(ldb, fprintf_file, &state, ldif);
 998 }
 999
1000 /*
1001   wrapper around ldif_write() for a string
1002 */
1003 struct ldif_write_string_state {
1004         char *string;
1005 };
1006
1007 static int ldif_printf_string(void *private_data, const char *fmt, ...) PRINTF_ATTRIBUTE(2, 3);
1008
1009 static int ldif_printf_string(void *private_data, const char *fmt, ...)
1010 {
1011         struct ldif_write_string_state *state =
1012                 (struct ldif_write_string_state *)private_data;
1013         va_list ap;
1014         size_t oldlen = talloc_get_size(state->string);
1015         va_start(ap, fmt);
1016
1017         state->string = talloc_vasprintf_append(state->string, fmt, ap);
1018         va_end(ap);
1019         if (!state->string) {
1020                 return -1;
1021         }
1022
1023         return talloc_get_size(state->string) - oldlen;
1024 }
1025
1026 char *ldb_ldif_write_redacted_trace_string(struct ldb_context *ldb, TALLOC_CTX *mem_ctx,
1027                                            const struct ldb_ldif *ldif)
1028 {
1029         struct ldif_write_string_state state;
1030         state.string = talloc_strdup(mem_ctx, "");
1031         if (!state.string) {
1032                 return NULL;
1033         }
1034         if (ldb_ldif_write_trace(ldb, ldif_printf_string, &state, ldif, true) == -1) {
1035                 return NULL;
1036         }
1037         return state.string;
1038 }
1039
1040 char *ldb_ldif_write_string(struct ldb_context *ldb, TALLOC_CTX *mem_ctx,
1041                             const struct ldb_ldif *ldif)
1042 {
1043         struct ldif_write_string_state state;
1044         state.string = talloc_strdup(mem_ctx, "");
1045         if (!state.string) {
1046                 return NULL;
1047         }
1048         if (ldb_ldif_write(ldb, ldif_printf_string, &state, ldif) == -1) {
1049                 return NULL;
1050         }
1051         return state.string;
1052 }
1053
1054 /*
1055   convenient function to turn a ldb_message into a string. Useful for
1056   debugging
1057  */
1058 char *ldb_ldif_message_string(struct ldb_context *ldb, TALLOC_CTX *mem_ctx,
1059                               enum ldb_changetype changetype,
1060                               const struct ldb_message *msg)
1061 {
1062         struct ldb_ldif ldif;
1063
1064         ldif.changetype = changetype;
1065         ldif.msg = discard_const_p(struct ldb_message, msg);
1066
1067         return ldb_ldif_write_string(ldb, mem_ctx, &ldif);
1068 }