git.sur5r.net Git - openldap/blob - libraries/libldap/schema.c

   1 /*
   2  * Copyright 1999 The OpenLDAP Foundation, All Rights Reserved.
   3  * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
   4  *
   5  * schema.c:  parsing routines used by servers and clients to process
   6  *      schema definitions
   7  */
   8
   9 #include "portable.h"
  10
  11 #include <stdio.h>
  12 #include <ac/stdlib.h>
  13
  14 #include <ac/ctype.h>
  15 #include <ac/string.h>
  16 #include <ac/time.h>
  17
  18 #include "ldap-int.h"
  19
  20 #include <ldap_schema.h>
  21
  22 /*
  23  * When pretty printing the entities we will be appending to a buffer.
  24  * Since checking for overflow, realloc'ing and checking if no error
  25  * is extremely boring, we will use a protection layer that will let
  26  * us blissfully ignore the error until the end.  This layer is
  27  * implemented with the help of the next type.
  28  */
  29
  30 typedef struct safe_string {
  31         char * val;
  32         ber_len_t size;
  33         ber_len_t pos;
  34         int at_whsp;
  35 } safe_string;
  36
  37 static safe_string *
  38 new_safe_string(int size)
  39 {
  40         safe_string * ss;
  41
  42         ss = LDAP_MALLOC(sizeof(safe_string));
  43         if ( !ss )
  44                 return(NULL);
  45
  46         ss->val = LDAP_MALLOC(size);
  47         if ( !ss->val ) {
  48                 LDAP_FREE(ss);
  49                 return(NULL);
  50         }
  51
  52         ss->size = size;
  53         ss->pos = 0;
  54         ss->at_whsp = 0;
  55
  56         return ss;
  57 }
  58
  59 static void
  60 safe_string_free(safe_string * ss)
  61 {
  62         if ( !ss )
  63                 return;
  64         LDAP_FREE(ss->val);
  65         LDAP_FREE(ss);
  66 }
  67
  68 static char *
  69 safe_string_val(safe_string * ss)
  70 {
  71         ss->val[ss->pos] = '\0';
  72         return(ss->val);
  73 }
  74
  75 static int
  76 append_to_safe_string(safe_string * ss, char * s)
  77 {
  78         int l = strlen(s);
  79         char * temp;
  80
  81         /*
  82          * Some runaway process is trying to append to a string that
  83          * overflowed and we could not extend.
  84          */
  85         if ( !ss->val )
  86                 return -1;
  87
  88         /* We always make sure there is at least one position available */
  89         if ( ss->pos + l >= ss->size-1 ) {
  90                 ss->size *= 2;
  91                 temp = LDAP_REALLOC(ss->val, ss->size);
  92                 if ( !temp ) {
  93                         /* Trouble, out of memory */
  94                         LDAP_FREE(ss->val);
  95                         return -1;
  96                 }
  97                 ss->val = temp;
  98         }
  99         strncpy(&ss->val[ss->pos], s, l);
 100         ss->pos += l;
 101         if ( ss->pos > 0 && isspace(ss->val[ss->pos-1]) )
 102                 ss->at_whsp = 1;
 103         else
 104                 ss->at_whsp = 0;
 105
 106         return 0;
 107 }
 108
 109 static int
 110 print_literal(safe_string *ss, char *s)
 111 {
 112         return(append_to_safe_string(ss,s));
 113 }
 114
 115 static int
 116 print_whsp(safe_string *ss)
 117 {
 118         if ( ss->at_whsp )
 119                 return(append_to_safe_string(ss,""));
 120         else
 121                 return(append_to_safe_string(ss," "));
 122 }
 123
 124 static int
 125 print_numericoid(safe_string *ss, char *s)
 126 {
 127         if ( s )
 128                 return(append_to_safe_string(ss,s));
 129         else
 130                 return(append_to_safe_string(ss,""));
 131 }
 132
 133 /* This one is identical to print_qdescr */
 134 static int
 135 print_qdstring(safe_string *ss, char *s)
 136 {
 137         print_whsp(ss);
 138         print_literal(ss,"'");
 139         append_to_safe_string(ss,s);
 140         print_literal(ss,"'");
 141         return(print_whsp(ss));
 142 }
 143
 144 static int
 145 print_qdescr(safe_string *ss, char *s)
 146 {
 147         print_whsp(ss);
 148         print_literal(ss,"'");
 149         append_to_safe_string(ss,s);
 150         print_literal(ss,"'");
 151         return(print_whsp(ss));
 152 }
 153
 154 static int
 155 print_qdescrlist(safe_string *ss, char **sa)
 156 {
 157         char **sp;
 158         int ret = 0;
 159
 160         for (sp=sa; *sp; sp++) {
 161                 ret = print_qdescr(ss,*sp);
 162         }
 163         /* If the list was empty, we return zero that is potentially
 164          * incorrect, but since we will be still appending things, the
 165          * overflow will be detected later.  Maybe FIX.
 166          */
 167         return(ret);
 168 }
 169
 170 static int
 171 print_qdescrs(safe_string *ss, char **sa)
 172 {
 173         /* The only way to represent an empty list is as a qdescrlist
 174          * so, if the list is empty we treat it as a long list.
 175          * Really, this is what the syntax mandates.  We should not
 176          * be here if the list was empty, but if it happens, a label
 177          * has already been output and we cannot undo it.
 178          */
 179         if ( !sa[0] || ( sa[0] && sa[1] ) ) {
 180                 print_whsp(ss);
 181                 print_literal(ss,"(");
 182                 print_qdescrlist(ss,sa);
 183                 print_literal(ss,")");
 184                 return(print_whsp(ss));
 185         } else {
 186           return(print_qdescr(ss,*sa));
 187         }
 188 }
 189
 190 static int
 191 print_woid(safe_string *ss, char *s)
 192 {
 193         print_whsp(ss);
 194         append_to_safe_string(ss,s);
 195         return print_whsp(ss);
 196 }
 197
 198 static int
 199 print_oidlist(safe_string *ss, char **sa)
 200 {
 201         char **sp;
 202
 203         for (sp=sa; *(sp+1); sp++) {
 204                 print_woid(ss,*sp);
 205                 print_literal(ss,"$");
 206         }
 207         return(print_woid(ss,*sp));
 208 }
 209
 210 static int
 211 print_oids(safe_string *ss, char **sa)
 212 {
 213         if ( sa[0] && sa[1] ) {
 214                 print_literal(ss,"(");
 215                 print_oidlist(ss,sa);
 216                 print_whsp(ss);
 217                 return(print_literal(ss,")"));
 218         } else {
 219                 return(print_woid(ss,*sa));
 220         }
 221 }
 222
 223 static int
 224 print_noidlen(safe_string *ss, char *s, int l)
 225 {
 226         char buf[64];
 227         int ret;
 228
 229         ret = print_numericoid(ss,s);
 230         if ( l ) {
 231                 sprintf(buf,"{%d}",l);
 232                 ret = print_literal(ss,buf);
 233         }
 234         return(ret);
 235 }
 236
 237 char *
 238 ldap_syntax2str( const LDAP_SYNTAX * syn )
 239 {
 240         safe_string * ss;
 241         char * retstring;
 242
 243         ss = new_safe_string(256);
 244         if ( !ss )
 245                 return NULL;
 246
 247         print_literal(ss,"(");
 248         print_whsp(ss);
 249
 250         print_numericoid(ss, syn->syn_oid);
 251         print_whsp(ss);
 252
 253         if ( syn->syn_desc ) {
 254                 print_literal(ss,"DESC");
 255                 print_qdstring(ss,syn->syn_desc);
 256         }
 257
 258         print_whsp(ss);
 259         print_literal(ss,")");
 260
 261         retstring = LDAP_STRDUP(safe_string_val(ss));
 262         safe_string_free(ss);
 263         return(retstring);
 264 }
 265
 266 char *
 267 ldap_matchingrule2str( const LDAP_MATCHING_RULE * mr )
 268 {
 269         safe_string * ss;
 270         char * retstring;
 271
 272         ss = new_safe_string(256);
 273         if ( !ss )
 274                 return NULL;
 275
 276         print_literal(ss,"(");
 277         print_whsp(ss);
 278
 279         print_numericoid(ss, mr->mr_oid);
 280         print_whsp(ss);
 281
 282         if ( mr->mr_names ) {
 283                 print_literal(ss,"NAME");
 284                 print_qdescrs(ss,mr->mr_names);
 285         }
 286
 287         if ( mr->mr_desc ) {
 288                 print_literal(ss,"DESC");
 289                 print_qdstring(ss,mr->mr_desc);
 290         }
 291
 292         if ( mr->mr_obsolete == LDAP_SCHEMA_YES ) {
 293                 print_literal(ss, "OBSOLETE");
 294                 print_whsp(ss);
 295         }
 296
 297         if ( mr->mr_syntax_oid ) {
 298                 print_literal(ss,"SYNTAX");
 299                 print_whsp(ss);
 300                 print_literal(ss, mr->mr_syntax_oid);
 301                 print_whsp(ss);
 302         }
 303
 304         print_whsp(ss);
 305         print_literal(ss,")");
 306
 307         retstring = LDAP_STRDUP(safe_string_val(ss));
 308         safe_string_free(ss);
 309         return(retstring);
 310 }
 311
 312 char *
 313 ldap_objectclass2str( const LDAP_OBJECT_CLASS * oc )
 314 {
 315         safe_string * ss;
 316         char * retstring;
 317
 318         ss = new_safe_string(256);
 319         if ( !ss )
 320                 return NULL;
 321
 322         print_literal(ss,"(");
 323         print_whsp(ss);
 324
 325         print_numericoid(ss, oc->oc_oid);
 326         print_whsp(ss);
 327
 328         if ( oc->oc_names ) {
 329                 print_literal(ss,"NAME");
 330                 print_qdescrs(ss,oc->oc_names);
 331         }
 332
 333         if ( oc->oc_desc ) {
 334                 print_literal(ss,"DESC");
 335                 print_qdstring(ss,oc->oc_desc);
 336         }
 337
 338         if ( oc->oc_obsolete == LDAP_SCHEMA_YES ) {
 339                 print_literal(ss, "OBSOLETE");
 340                 print_whsp(ss);
 341         }
 342
 343         if ( oc->oc_sup_oids ) {
 344                 print_literal(ss,"SUP");
 345                 print_whsp(ss);
 346                 print_oids(ss,oc->oc_sup_oids);
 347                 print_whsp(ss);
 348         }
 349
 350         switch (oc->oc_kind) {
 351         case LDAP_SCHEMA_ABSTRACT:
 352                 print_literal(ss,"ABSTRACT");
 353                 break;
 354         case LDAP_SCHEMA_STRUCTURAL:
 355                 print_literal(ss,"STRUCTURAL");
 356                 break;
 357         case LDAP_SCHEMA_AUXILIARY:
 358                 print_literal(ss,"AUXILIARY");
 359                 break;
 360         default:
 361                 print_literal(ss,"KIND-UNKNOWN");
 362                 break;
 363         }
 364         print_whsp(ss);
 365
 366         if ( oc->oc_at_oids_must ) {
 367                 print_literal(ss,"MUST");
 368                 print_whsp(ss);
 369                 print_oids(ss,oc->oc_at_oids_must);
 370                 print_whsp(ss);
 371         }
 372
 373         if ( oc->oc_at_oids_may ) {
 374                 print_literal(ss,"MAY");
 375                 print_whsp(ss);
 376                 print_oids(ss,oc->oc_at_oids_may);
 377                 print_whsp(ss);
 378         }
 379
 380         print_whsp(ss);
 381         print_literal(ss,")");
 382
 383         retstring = LDAP_STRDUP(safe_string_val(ss));
 384         safe_string_free(ss);
 385         return(retstring);
 386 }
 387
 388 char *
 389 ldap_attributetype2str( const LDAP_ATTRIBUTE_TYPE * at )
 390 {
 391         safe_string * ss;
 392         char * retstring;
 393
 394         ss = new_safe_string(256);
 395         if ( !ss )
 396                 return NULL;
 397
 398         print_literal(ss,"(");
 399         print_whsp(ss);
 400
 401         print_numericoid(ss, at->at_oid);
 402         print_whsp(ss);
 403
 404         if ( at->at_names ) {
 405                 print_literal(ss,"NAME");
 406                 print_qdescrs(ss,at->at_names);
 407         }
 408
 409         if ( at->at_desc ) {
 410                 print_literal(ss,"DESC");
 411                 print_qdstring(ss,at->at_desc);
 412         }
 413
 414         if ( at->at_obsolete == LDAP_SCHEMA_YES ) {
 415                 print_literal(ss, "OBSOLETE");
 416                 print_whsp(ss);
 417         }
 418
 419         if ( at->at_sup_oid ) {
 420                 print_literal(ss,"SUP");
 421                 print_woid(ss,at->at_sup_oid);
 422         }
 423
 424         if ( at->at_equality_oid ) {
 425                 print_literal(ss,"EQUALITY");
 426                 print_woid(ss,at->at_equality_oid);
 427         }
 428
 429         if ( at->at_ordering_oid ) {
 430                 print_literal(ss,"ORDERING");
 431                 print_woid(ss,at->at_ordering_oid);
 432         }
 433
 434         if ( at->at_substr_oid ) {
 435                 print_literal(ss,"SUBSTR");
 436                 print_woid(ss,at->at_substr_oid);
 437         }
 438
 439         if ( at->at_syntax_oid ) {
 440                 print_literal(ss,"SYNTAX");
 441                 print_whsp(ss);
 442                 print_noidlen(ss,at->at_syntax_oid,at->at_syntax_len);
 443                 print_whsp(ss);
 444         }
 445
 446         if ( at->at_single_value == LDAP_SCHEMA_YES ) {
 447                 print_literal(ss,"SINGLE-VALUE");
 448                 print_whsp(ss);
 449         }
 450
 451         if ( at->at_collective == LDAP_SCHEMA_YES ) {
 452                 print_literal(ss,"COLLECTIVE");
 453                 print_whsp(ss);
 454         }
 455
 456         if ( at->at_no_user_mod == LDAP_SCHEMA_YES ) {
 457                 print_literal(ss,"NO-USER-MODIFICATION");
 458                 print_whsp(ss);
 459         }
 460
 461         if ( at->at_usage != LDAP_SCHEMA_USER_APPLICATIONS ) {
 462                 print_literal(ss,"USAGE");
 463                 print_whsp(ss);
 464                 switch (at->at_usage) {
 465                 case LDAP_SCHEMA_DIRECTORY_OPERATION:
 466                         print_literal(ss,"directoryOperation");
 467                         break;
 468                 case LDAP_SCHEMA_DISTRIBUTED_OPERATION:
 469                         print_literal(ss,"distributedOperation");
 470                         break;
 471                 case LDAP_SCHEMA_DSA_OPERATION:
 472                         print_literal(ss,"dSAOperation");
 473                         break;
 474                 default:
 475                         print_literal(ss,"UNKNOWN");
 476                         break;
 477                 }
 478         }
 479
 480         print_whsp(ss);
 481         print_literal(ss,")");
 482
 483         retstring = LDAP_STRDUP(safe_string_val(ss));
 484         safe_string_free(ss);
 485         return(retstring);
 486 }
 487
 488 /*
 489  * Now come the parsers.  There is one parser for each entity type:
 490  * objectclasses, attributetypes, etc.
 491  *
 492  * Each of them is written as a recursive-descent parser, except that
 493  * none of them is really recursive.  But the idea is kept: there
 494  * is one routine per non-terminal that eithers gobbles lexical tokens
 495  * or calls lower-level routines, etc.
 496  *
 497  * The scanner is implemented in the routine get_token.  Actually,
 498  * get_token is more than a scanner and will return tokens that are
 499  * in fact non-terminals in the grammar.  So you can see the whole
 500  * approach as the combination of a low-level bottom-up recognizer
 501  * combined with a scanner and a number of top-down parsers.  Or just
 502  * consider that the real grammars recognized by the parsers are not
 503  * those of the standards.  As a matter of fact, our parsers are more
 504  * liberal than the spec when there is no ambiguity.
 505  *
 506  * The difference is pretty academic (modulo bugs or incorrect
 507  * interpretation of the specs).
 508  */
 509
 510 #define TK_NOENDQUOTE   -2
 511 #define TK_OUTOFMEM     -1
 512 #define TK_EOS          0
 513 #define TK_UNEXPCHAR    1
 514 #define TK_BAREWORD     2
 515 #define TK_QDSTRING     3
 516 #define TK_LEFTPAREN    4
 517 #define TK_RIGHTPAREN   5
 518 #define TK_DOLLAR       6
 519 #define TK_QDESCR       TK_QDSTRING
 520
 521 struct token {
 522         int type;
 523         char *sval;
 524 };
 525
 526 static int
 527 get_token(const char ** sp, char ** token_val)
 528 {
 529         int kind;
 530         const char * p;
 531         const char * q;
 532         char * res;
 533
 534         switch (**sp) {
 535         case '\0':
 536                 kind = TK_EOS;
 537                 (*sp)++;
 538                 break;
 539         case '(':
 540                 kind = TK_LEFTPAREN;
 541                 (*sp)++;
 542                 break;
 543         case ')':
 544                 kind = TK_RIGHTPAREN;
 545                 (*sp)++;
 546                 break;
 547         case '$':
 548                 kind = TK_DOLLAR;
 549                 (*sp)++;
 550                 break;
 551         case '\'':
 552                 kind = TK_QDSTRING;
 553                 (*sp)++;
 554                 p = *sp;
 555                 while ( **sp != '\'' && **sp != '\0' )
 556                         (*sp)++;
 557                 if ( **sp == '\'' ) {
 558                         q = *sp;
 559                         res = LDAP_MALLOC(q-p+1);
 560                         if ( !res ) {
 561                                 kind = TK_OUTOFMEM;
 562                         } else {
 563                                 strncpy(res,p,q-p);
 564                                 res[q-p] = '\0';
 565                                 *token_val = res;
 566                         }
 567                         (*sp)++;
 568                 } else {
 569                         kind = TK_NOENDQUOTE;
 570                 }
 571                 break;
 572         default:
 573                 kind = TK_BAREWORD;
 574                 p = *sp;
 575                 while ( !isspace(**sp) && **sp != '\0' )
 576                         (*sp)++;
 577                 q = *sp;
 578                 res = LDAP_MALLOC(q-p+1);
 579                 if ( !res ) {
 580                         kind = TK_OUTOFMEM;
 581                 } else {
 582                         strncpy(res,p,q-p);
 583                         res[q-p] = '\0';
 584                         *token_val = res;
 585                 }
 586                 break;
 587 /*              kind = TK_UNEXPCHAR; */
 588 /*              break; */
 589         }
 590
 591         return kind;
 592 }
 593
 594 /* Gobble optional whitespace */
 595 static void
 596 parse_whsp(const char **sp)
 597 {
 598         while (isspace(**sp))
 599                 (*sp)++;
 600 }
 601
 602 /* TBC:!!
 603  * General note for all parsers: to guarantee the algorithm halts they
 604  * must always advance the pointer even when an error is found.  For
 605  * this one is not that important since an error here is fatal at the
 606  * upper layers, but it is a simple strategy that will not get in
 607  * endless loops.
 608  */
 609
 610 /* Parse a sequence of dot-separated decimal strings */
 611 static char *
 612 parse_numericoid(const char **sp, int *code, const int allow_quoted)
 613 {
 614         char * res;
 615         const char * start = *sp;
 616         int len;
 617         int quoted = 0;
 618
 619         /* Netscape puts the SYNTAX value in quotes (incorrectly) */
 620         if ( allow_quoted && **sp == '\'' ) {
 621                 quoted = 1;
 622                 (*sp)++;
 623                 start++;
 624         }
 625         /* Each iteration of this loop gets one decimal string */
 626         while (**sp) {
 627                 if ( !isdigit(**sp) ) {
 628                         /*
 629                          * Initial char is not a digit or char after dot is
 630                          * not a digit
 631                          */
 632                         *code = LDAP_SCHERR_NODIGIT;
 633                         return NULL;
 634                 }
 635                 (*sp)++;
 636                 while ( isdigit(**sp) )
 637                         (*sp)++;
 638                 if ( **sp != '.' )
 639                         break;
 640                 /* Otherwise, gobble the dot and loop again */
 641                 (*sp)++;
 642         }
 643         /* Now *sp points at the char past the numericoid. Perfect. */
 644         len = *sp - start;
 645         res = LDAP_MALLOC(len+1);
 646         if (!res) {
 647                 *code = LDAP_SCHERR_OUTOFMEM;
 648                 return(NULL);
 649         }
 650         strncpy(res,start,len);
 651         res[len] = '\0';
 652         if ( allow_quoted && quoted ) {
 653                 if ( **sp == '\'' ) {
 654                         (*sp)++;
 655                 } else {
 656                         *code = LDAP_SCHERR_UNEXPTOKEN;
 657                         LDAP_FREE(res);
 658                         return NULL;
 659                 }
 660         }
 661         return(res);
 662 }
 663
 664 /* Parse a qdescr or a list of them enclosed in () */
 665 static char **
 666 parse_qdescrs(const char **sp, int *code)
 667 {
 668         char ** res;
 669         char ** res1;
 670         int kind;
 671         char * sval;
 672         int size;
 673         int pos;
 674
 675         parse_whsp(sp);
 676         kind = get_token(sp,&sval);
 677         if ( kind == TK_LEFTPAREN ) {
 678                 /* Let's presume there will be at least 2 entries */
 679                 size = 3;
 680                 res = LDAP_CALLOC(3,sizeof(char *));
 681                 if ( !res ) {
 682                         *code = LDAP_SCHERR_OUTOFMEM;
 683                         return NULL;
 684                 }
 685                 pos = 0;
 686                 while (1) {
 687                         parse_whsp(sp);
 688                         kind = get_token(sp,&sval);
 689                         if ( kind == TK_RIGHTPAREN )
 690                                 break;
 691                         if ( kind == TK_QDESCR ) {
 692                                 if ( pos == size-2 ) {
 693                                         size++;
 694                                         res1 = LDAP_REALLOC(res,size*sizeof(char *));
 695                                         if ( !res1 ) {
 696                                                 LDAP_VFREE(res);
 697                                                 *code = LDAP_SCHERR_OUTOFMEM;
 698                                                 return(NULL);
 699                                         }
 700                                         res = res1;
 701                                 }
 702                                 res[pos] = sval;
 703                                 pos++;
 704                                 parse_whsp(sp);
 705                         } else {
 706                                 LDAP_VFREE(res);
 707                                 *code = LDAP_SCHERR_UNEXPTOKEN;
 708                                 return(NULL);
 709                         }
 710                 }
 711                 res[pos] = NULL;
 712                 parse_whsp(sp);
 713                 return(res);
 714         } else if ( kind == TK_QDESCR ) {
 715                 res = LDAP_CALLOC(2,sizeof(char *));
 716                 if ( !res ) {
 717                         *code = LDAP_SCHERR_OUTOFMEM;
 718                         return NULL;
 719                 }
 720                 res[0] = sval;
 721                 res[1] = NULL;
 722                 parse_whsp(sp);
 723                 return res;
 724         } else {
 725                 *code = LDAP_SCHERR_BADNAME;
 726                 return NULL;
 727         }
 728 }
 729
 730 /* Parse a woid */
 731 static char *
 732 parse_woid(const char **sp, int *code)
 733 {
 734         char * sval;
 735         int kind;
 736
 737         parse_whsp(sp);
 738         kind = get_token(sp, &sval);
 739         if ( kind != TK_BAREWORD ) {
 740                 *code = LDAP_SCHERR_UNEXPTOKEN;
 741                 return NULL;
 742         }
 743         parse_whsp(sp);
 744         return sval;
 745 }
 746
 747 /* Parse a noidlen */
 748 static char *
 749 parse_noidlen(const char **sp, int *code, int *len, int allow_quoted)
 750 {
 751         char * sval;
 752         int quoted = 0;
 753
 754         *len = 0;
 755         /* Netscape puts the SYNTAX value in quotes (incorrectly) */
 756         if ( allow_quoted && **sp == '\'' ) {
 757                 quoted = 1;
 758                 (*sp)++;
 759         }
 760         sval = parse_numericoid(sp, code, 0);
 761         if ( !sval ) {
 762                 return NULL;
 763         }
 764         if ( **sp == '{' ) {
 765                 (*sp)++;
 766                 *len = atoi(*sp);
 767                 while ( isdigit(**sp) )
 768                         (*sp)++;
 769                 if ( **sp != '}' ) {
 770                         *code = LDAP_SCHERR_UNEXPTOKEN;
 771                         LDAP_FREE(sval);
 772                         return NULL;
 773                 }
 774                 (*sp)++;
 775         }
 776         if ( allow_quoted && quoted ) {
 777                 if ( **sp == '\'' ) {
 778                         (*sp)++;
 779                 } else {
 780                         *code = LDAP_SCHERR_UNEXPTOKEN;
 781                         LDAP_FREE(sval);
 782                         return NULL;
 783                 }
 784         }
 785         return sval;
 786 }
 787
 788 /*
 789  * Next routine will accept a qdstring in place of an oid if
 790  * allow_quoted is set.  This is necessary to interoperate with
 791  * Netscape Directory server that will improperly quote each oid (at
 792  * least those of the descr kind) in the SUP clause.
 793  */
 794
 795 /* Parse a woid or a $-separated list of them enclosed in () */
 796 static char **
 797 parse_oids(const char **sp, int *code, const int allow_quoted)
 798 {
 799         char ** res;
 800         char ** res1;
 801         int kind;
 802         char * sval;
 803         int size;
 804         int pos;
 805
 806         /*
 807          * Strictly speaking, doing this here accepts whsp before the
 808          * ( at the begining of an oidlist, but this is harmless.  Also,
 809          * we are very liberal in what we accept as an OID.  Maybe
 810          * refine later.
 811          */
 812         parse_whsp(sp);
 813         kind = get_token(sp,&sval);
 814         if ( kind == TK_LEFTPAREN ) {
 815                 /* Let's presume there will be at least 2 entries */
 816                 size = 3;
 817                 res = LDAP_CALLOC(3,sizeof(char *));
 818                 if ( !res ) {
 819                         *code = LDAP_SCHERR_OUTOFMEM;
 820                         return NULL;
 821                 }
 822                 pos = 0;
 823                 parse_whsp(sp);
 824                 kind = get_token(sp,&sval);
 825                 if ( kind == TK_BAREWORD ||
 826                      ( allow_quoted && kind == TK_QDSTRING ) ) {
 827                         res[pos] = sval;
 828                         pos++;
 829                 } else {
 830                         *code = LDAP_SCHERR_UNEXPTOKEN;
 831                         LDAP_VFREE(res);
 832                         return NULL;
 833                 }
 834                 parse_whsp(sp);
 835                 while (1) {
 836                         kind = get_token(sp,&sval);
 837                         if ( kind == TK_RIGHTPAREN )
 838                                 break;
 839                         if ( kind == TK_DOLLAR ) {
 840                                 parse_whsp(sp);
 841                                 kind = get_token(sp,&sval);
 842                                 if ( kind == TK_BAREWORD ||
 843                                      ( allow_quoted &&
 844                                        kind == TK_QDSTRING ) ) {
 845                                         if ( pos == size-2 ) {
 846                                                 size++;
 847                                                 res1 = LDAP_REALLOC(res,size*sizeof(char *));
 848                                                 if ( !res1 ) {
 849                                                   LDAP_VFREE(res);
 850                                                   *code = LDAP_SCHERR_OUTOFMEM;
 851                                                   return(NULL);
 852                                                 }
 853                                                 res = res1;
 854                                         }
 855                                         res[pos] = sval;
 856                                         pos++;
 857                                 } else {
 858                                         *code = LDAP_SCHERR_UNEXPTOKEN;
 859                                         LDAP_VFREE(res);
 860                                         return NULL;
 861                                 }
 862                                 parse_whsp(sp);
 863                         } else {
 864                                 *code = LDAP_SCHERR_UNEXPTOKEN;
 865                                 LDAP_VFREE(res);
 866                                 return NULL;
 867                         }
 868                 }
 869                 res[pos] = NULL;
 870                 parse_whsp(sp);
 871                 return(res);
 872         } else if ( kind == TK_BAREWORD ||
 873                     ( allow_quoted && kind == TK_QDSTRING ) ) {
 874                 res = LDAP_CALLOC(2,sizeof(char *));
 875                 if ( !res ) {
 876                         *code = LDAP_SCHERR_OUTOFMEM;
 877                         return NULL;
 878                 }
 879                 res[0] = sval;
 880                 res[1] = NULL;
 881                 parse_whsp(sp);
 882                 return res;
 883         } else {
 884                 *code = LDAP_SCHERR_BADNAME;
 885                 return NULL;
 886         }
 887 }
 888
 889 void
 890 ldap_syntax_free( LDAP_SYNTAX * syn )
 891 {
 892         LDAP_FREE(syn->syn_oid);
 893         LDAP_FREE(syn->syn_desc);
 894         LDAP_FREE(syn);
 895 }
 896
 897 LDAP_SYNTAX *
 898 ldap_str2syntax( const char * s, int * code, const char ** errp )
 899 {
 900         int kind;
 901         const char * ss = s;
 902         char * sval;
 903         int seen_desc = 0;
 904         LDAP_SYNTAX * syn;
 905         char ** ssdummy;
 906
 907         if ( !s ) {
 908                 *code = LDAP_SCHERR_EMPTY;
 909                 *errp = "";
 910                 return NULL;
 911         }
 912
 913         *errp = s;
 914         syn = LDAP_CALLOC(1,sizeof(LDAP_SYNTAX));
 915
 916         if ( !syn ) {
 917                 *code = LDAP_SCHERR_OUTOFMEM;
 918                 return NULL;
 919         }
 920
 921         kind = get_token(&ss,&sval);
 922         if ( kind != TK_LEFTPAREN ) {
 923                 *code = LDAP_SCHERR_NOLEFTPAREN;
 924                 ldap_syntax_free(syn);
 925                 return NULL;
 926         }
 927
 928         parse_whsp(&ss);
 929         syn->syn_oid = parse_numericoid(&ss,code,0);
 930         if ( !syn->syn_oid ) {
 931                 *errp = ss;
 932                 ldap_syntax_free(syn);
 933                 return NULL;
 934         }
 935         parse_whsp(&ss);
 936
 937         /*
 938          * Beyond this point we will be liberal and accept the items
 939          * in any order.
 940          */
 941         while (1) {
 942                 kind = get_token(&ss,&sval);
 943                 switch (kind) {
 944                 case TK_EOS:
 945                         *code = LDAP_SCHERR_NORIGHTPAREN;
 946                         *errp = ss;
 947                         ldap_syntax_free(syn);
 948                         return NULL;
 949                 case TK_RIGHTPAREN:
 950                         return syn;
 951                 case TK_BAREWORD:
 952                         if ( !strcmp(sval,"DESC") ) {
 953                                 if ( seen_desc ) {
 954                                         *code = LDAP_SCHERR_DUPOPT;
 955                                         *errp = ss;
 956                                         ldap_syntax_free(syn);
 957                                         return(NULL);
 958                                 }
 959                                 seen_desc = 1;
 960                                 parse_whsp(&ss);
 961                                 kind = get_token(&ss,&sval);
 962                                 if ( kind != TK_QDSTRING ) {
 963                                         *code = LDAP_SCHERR_UNEXPTOKEN;
 964                                         *errp = ss;
 965                                         ldap_syntax_free(syn);
 966                                         return NULL;
 967                                 }
 968                                 syn->syn_desc = sval;
 969                                 parse_whsp(&ss);
 970                         } else if ( sval[0] == 'X' && sval[1] == '-' ) {
 971                                 /* Should be parse_qdstrings */
 972                                 ssdummy = parse_qdescrs(&ss, code);
 973                                 if ( !ssdummy ) {
 974                                         *errp = ss;
 975                                         ldap_syntax_free(syn);
 976                                         return NULL;
 977                                 }
 978                         } else {
 979                                 *code = LDAP_SCHERR_UNEXPTOKEN;
 980                                 *errp = ss;
 981                                 ldap_syntax_free(syn);
 982                                 return NULL;
 983                         }
 984                         break;
 985                 default:
 986                         *code = LDAP_SCHERR_UNEXPTOKEN;
 987                         *errp = ss;
 988                         ldap_syntax_free(syn);
 989                         return NULL;
 990                 }
 991         }
 992 }
 993
 994 void
 995 ldap_matchingrule_free( LDAP_MATCHING_RULE * mr )
 996 {
 997         LDAP_FREE(mr->mr_oid);
 998         LDAP_VFREE(mr->mr_names);
 999         LDAP_FREE(mr->mr_desc);
1000         LDAP_FREE(mr->mr_syntax_oid);
1001         LDAP_FREE(mr);
1002 }
1003
1004 LDAP_MATCHING_RULE *
1005 ldap_str2matchingrule( const char * s, int * code, const char ** errp )
1006 {
1007         int kind;
1008         const char * ss = s;
1009         char * sval;
1010         int be_liberal = 1;     /* Future additional argument */
1011         int seen_name = 0;
1012         int seen_desc = 0;
1013         int seen_obsolete = 0;
1014         int seen_syntax = 0;
1015         LDAP_MATCHING_RULE * mr;
1016         char ** ssdummy;
1017         const char * savepos;
1018
1019         if ( !s ) {
1020                 *code = LDAP_SCHERR_EMPTY;
1021                 *errp = "";
1022                 return NULL;
1023         }
1024
1025         *errp = s;
1026         mr = LDAP_CALLOC(1,sizeof(LDAP_MATCHING_RULE));
1027
1028         if ( !mr ) {
1029                 *code = LDAP_SCHERR_OUTOFMEM;
1030                 return NULL;
1031         }
1032
1033         kind = get_token(&ss,&sval);
1034         if ( kind != TK_LEFTPAREN ) {
1035                 *code = LDAP_SCHERR_NOLEFTPAREN;
1036                 ldap_matchingrule_free(mr);
1037                 return NULL;
1038         }
1039
1040         parse_whsp(&ss);
1041         savepos = ss;
1042         mr->mr_oid = parse_numericoid(&ss,code,be_liberal);
1043         if ( !mr->mr_oid ) {
1044                 if ( be_liberal ) {
1045                         /* Backtracking */
1046                         ss = savepos;
1047                         kind = get_token(&ss,&sval);
1048                         if ( kind == TK_BAREWORD ) {
1049                                 if ( !strcmp(sval, "NAME") ||
1050                                      !strcmp(sval, "DESC") ||
1051                                      !strcmp(sval, "OBSOLETE") ||
1052                                      !strcmp(sval, "SYNTAX") ||
1053                                      !strncmp(sval, "X-", 2) ) {
1054                                         /* Missing OID, backtrack */
1055                                         ss = savepos;
1056                                 } else {
1057                                         /* Non-numerical OID, ignore */
1058                                 }
1059                           }
1060                 } else {
1061                         *errp = ss;
1062                         ldap_matchingrule_free(mr);
1063                         return NULL;
1064                 }
1065         }
1066         parse_whsp(&ss);
1067
1068         /*
1069          * Beyond this point we will be liberal and accept the items
1070          * in any order.
1071          */
1072         while (1) {
1073                 kind = get_token(&ss,&sval);
1074                 switch (kind) {
1075                 case TK_EOS:
1076                         *code = LDAP_SCHERR_NORIGHTPAREN;
1077                         *errp = ss;
1078                         ldap_matchingrule_free(mr);
1079                         return NULL;
1080                 case TK_RIGHTPAREN:
1081                         return mr;
1082                 case TK_BAREWORD:
1083                         if ( !strcmp(sval,"NAME") ) {
1084                                 if ( seen_name ) {
1085                                         *code = LDAP_SCHERR_DUPOPT;
1086                                         *errp = ss;
1087                                         ldap_matchingrule_free(mr);
1088                                         return(NULL);
1089                                 }
1090                                 seen_name = 1;
1091                                 mr->mr_names = parse_qdescrs(&ss,code);
1092                                 if ( !mr->mr_names ) {
1093                                         if ( *code != LDAP_SCHERR_OUTOFMEM )
1094                                                 *code = LDAP_SCHERR_BADNAME;
1095                                         *errp = ss;
1096                                         ldap_matchingrule_free(mr);
1097                                         return NULL;
1098                                 }
1099                         } else if ( !strcmp(sval,"DESC") ) {
1100                                 if ( seen_desc ) {
1101                                         *code = LDAP_SCHERR_DUPOPT;
1102                                         *errp = ss;
1103                                         ldap_matchingrule_free(mr);
1104                                         return(NULL);
1105                                 }
1106                                 seen_desc = 1;
1107                                 parse_whsp(&ss);
1108                                 kind = get_token(&ss,&sval);
1109                                 if ( kind != TK_QDSTRING ) {
1110                                         *code = LDAP_SCHERR_UNEXPTOKEN;
1111                                         *errp = ss;
1112                                         ldap_matchingrule_free(mr);
1113                                         return NULL;
1114                                 }
1115                                 mr->mr_desc = sval;
1116                                 parse_whsp(&ss);
1117                         } else if ( !strcmp(sval,"OBSOLETE") ) {
1118                                 if ( seen_obsolete ) {
1119                                         *code = LDAP_SCHERR_DUPOPT;
1120                                         *errp = ss;
1121                                         ldap_matchingrule_free(mr);
1122                                         return(NULL);
1123                                 }
1124                                 seen_obsolete = 1;
1125                                 mr->mr_obsolete = LDAP_SCHEMA_YES;
1126                                 parse_whsp(&ss);
1127                         } else if ( !strcmp(sval,"SYNTAX") ) {
1128                                 if ( seen_syntax ) {
1129                                         *code = LDAP_SCHERR_DUPOPT;
1130                                         *errp = ss;
1131                                         ldap_matchingrule_free(mr);
1132                                         return(NULL);
1133                                 }
1134                                 seen_syntax = 1;
1135                                 parse_whsp(&ss);
1136                                 mr->mr_syntax_oid =
1137                                         parse_numericoid(&ss,code,be_liberal);
1138                                 if ( !mr->mr_syntax_oid ) {
1139                                         *errp = ss;
1140                                         ldap_matchingrule_free(mr);
1141                                         return NULL;
1142                                 }
1143                                 parse_whsp(&ss);
1144                         } else if ( sval[0] == 'X' && sval[1] == '-' ) {
1145                                 /* Should be parse_qdstrings */
1146                                 ssdummy = parse_qdescrs(&ss, code);
1147                                 if ( !ssdummy ) {
1148                                         *errp = ss;
1149                                         ldap_matchingrule_free(mr);
1150                                         return NULL;
1151                                 }
1152                         } else {
1153                                 *code = LDAP_SCHERR_UNEXPTOKEN;
1154                                 *errp = ss;
1155                                 ldap_matchingrule_free(mr);
1156                                 return NULL;
1157                         }
1158                         break;
1159                 default:
1160                         *code = LDAP_SCHERR_UNEXPTOKEN;
1161                         *errp = ss;
1162                         ldap_matchingrule_free(mr);
1163                         return NULL;
1164                 }
1165         }
1166 }
1167
1168 void
1169 ldap_attributetype_free(LDAP_ATTRIBUTE_TYPE * at)
1170 {
1171         LDAP_FREE(at->at_oid);
1172         LDAP_VFREE(at->at_names);
1173         LDAP_FREE(at->at_desc);
1174         LDAP_FREE(at->at_sup_oid);
1175         LDAP_FREE(at->at_equality_oid);
1176         LDAP_FREE(at->at_ordering_oid);
1177         LDAP_FREE(at->at_substr_oid);
1178         LDAP_FREE(at->at_syntax_oid);
1179         LDAP_FREE(at);
1180 }
1181
1182 LDAP_ATTRIBUTE_TYPE *
1183 ldap_str2attributetype( const char * s, int * code, const char ** errp )
1184 {
1185         int kind;
1186         const char * ss = s;
1187         char * sval;
1188         int be_liberal = 1;     /* Future additional argument */
1189         int seen_name = 0;
1190         int seen_desc = 0;
1191         int seen_obsolete = 0;
1192         int seen_sup = 0;
1193         int seen_equality = 0;
1194         int seen_ordering = 0;
1195         int seen_substr = 0;
1196         int seen_syntax = 0;
1197         int seen_usage = 0;
1198         int seen_kind = 0;
1199         int seen_must = 0;
1200         int seen_may = 0;
1201         LDAP_ATTRIBUTE_TYPE * at;
1202         char ** ssdummy;
1203         const char * savepos;
1204
1205         if ( !s ) {
1206                 *code = LDAP_SCHERR_EMPTY;
1207                 *errp = "";
1208                 return NULL;
1209         }
1210
1211         *errp = s;
1212         at = LDAP_CALLOC(1,sizeof(LDAP_ATTRIBUTE_TYPE));
1213
1214         if ( !at ) {
1215                 *code = LDAP_SCHERR_OUTOFMEM;
1216                 return NULL;
1217         }
1218
1219         kind = get_token(&ss,&sval);
1220         if ( kind != TK_LEFTPAREN ) {
1221                 *code = LDAP_SCHERR_NOLEFTPAREN;
1222                 ldap_attributetype_free(at);
1223                 return NULL;
1224         }
1225
1226         /*
1227          * Definitions MUST begin with an OID in the numericoid format.
1228          * However, this routine is used by clients to parse the response
1229          * from servers and very well known servers will provide an OID
1230          * in the wrong format or even no OID at all.  We do our best to
1231          * extract info from those servers.
1232          */
1233         parse_whsp(&ss);
1234         savepos = ss;
1235         at->at_oid = parse_numericoid(&ss,code,0);
1236         if ( !at->at_oid ) {
1237                 if ( be_liberal ) {
1238                         /* Backtracking */
1239                         ss = savepos;
1240                         kind = get_token(&ss,&sval);
1241                         if ( kind == TK_BAREWORD ) {
1242                                 if ( !strcmp(sval, "NAME") ||
1243                                      !strcmp(sval, "DESC") ||
1244                                      !strcmp(sval, "OBSOLETE") ||
1245                                      !strcmp(sval, "SUP") ||
1246                                      !strcmp(sval, "EQUALITY") ||
1247                                      !strcmp(sval, "ORDERING") ||
1248                                      !strcmp(sval, "SUBSTR") ||
1249                                      !strcmp(sval, "SYNTAX") ||
1250                                      !strcmp(sval, "SINGLE-VALUE") ||
1251                                      !strcmp(sval, "COLLECTIVE") ||
1252                                      !strcmp(sval, "NO-USER-MODIFICATION") ||
1253                                      !strcmp(sval, "USAGE") ||
1254                                      !strncmp(sval, "X-", 2) ) {
1255                                         /* Missing OID, backtrack */
1256                                         ss = savepos;
1257                                 } else {
1258                                         /* Non-numerical OID, ignore */
1259                                 }
1260                           }
1261                 } else {
1262                         *errp = ss;
1263                         ldap_attributetype_free(at);
1264                         return NULL;
1265                 }
1266         }
1267         parse_whsp(&ss);
1268
1269         /*
1270          * Beyond this point we will be liberal and accept the items
1271          * in any order.
1272          */
1273         while (1) {
1274                 kind = get_token(&ss,&sval);
1275                 switch (kind) {
1276                 case TK_EOS:
1277                         *code = LDAP_SCHERR_NORIGHTPAREN;
1278                         *errp = ss;
1279                         ldap_attributetype_free(at);
1280                         return NULL;
1281                 case TK_RIGHTPAREN:
1282                         return at;
1283                 case TK_BAREWORD:
1284                         if ( !strcmp(sval,"NAME") ) {
1285                                 if ( seen_name ) {
1286                                         *code = LDAP_SCHERR_DUPOPT;
1287                                         *errp = ss;
1288                                         ldap_attributetype_free(at);
1289                                         return(NULL);
1290                                 }
1291                                 seen_name = 1;
1292                                 at->at_names = parse_qdescrs(&ss,code);
1293                                 if ( !at->at_names ) {
1294                                         if ( *code != LDAP_SCHERR_OUTOFMEM )
1295                                                 *code = LDAP_SCHERR_BADNAME;
1296                                         *errp = ss;
1297                                         ldap_attributetype_free(at);
1298                                         return NULL;
1299                                 }
1300                         } else if ( !strcmp(sval,"DESC") ) {
1301                                 if ( seen_desc ) {
1302                                         *code = LDAP_SCHERR_DUPOPT;
1303                                         *errp = ss;
1304                                         ldap_attributetype_free(at);
1305                                         return(NULL);
1306                                 }
1307                                 seen_desc = 1;
1308                                 parse_whsp(&ss);
1309                                 kind = get_token(&ss,&sval);
1310                                 if ( kind != TK_QDSTRING ) {
1311                                         *code = LDAP_SCHERR_UNEXPTOKEN;
1312                                         *errp = ss;
1313                                         ldap_attributetype_free(at);
1314                                         return NULL;
1315                                 }
1316                                 at->at_desc = sval;
1317                                 parse_whsp(&ss);
1318                         } else if ( !strcmp(sval,"OBSOLETE") ) {
1319                                 if ( seen_obsolete ) {
1320                                         *code = LDAP_SCHERR_DUPOPT;
1321                                         *errp = ss;
1322                                         ldap_attributetype_free(at);
1323                                         return(NULL);
1324                                 }
1325                                 seen_obsolete = 1;
1326                                 at->at_obsolete = LDAP_SCHEMA_YES;
1327                                 parse_whsp(&ss);
1328                         } else if ( !strcmp(sval,"SUP") ) {
1329                                 if ( seen_sup ) {
1330                                         *code = LDAP_SCHERR_DUPOPT;
1331                                         *errp = ss;
1332                                         ldap_attributetype_free(at);
1333                                         return(NULL);
1334                                 }
1335                                 seen_sup = 1;
1336                                 at->at_sup_oid = parse_woid(&ss,code);
1337                                 if ( !at->at_sup_oid ) {
1338                                         *errp = ss;
1339                                         ldap_attributetype_free(at);
1340                                         return NULL;
1341                                 }
1342                         } else if ( !strcmp(sval,"EQUALITY") ) {
1343                                 if ( seen_equality ) {
1344                                         *code = LDAP_SCHERR_DUPOPT;
1345                                         *errp = ss;
1346                                         ldap_attributetype_free(at);
1347                                         return(NULL);
1348                                 }
1349                                 seen_equality = 1;
1350                                 at->at_equality_oid = parse_woid(&ss,code);
1351                                 if ( !at->at_equality_oid ) {
1352                                         *errp = ss;
1353                                         ldap_attributetype_free(at);
1354                                         return NULL;
1355                                 }
1356                         } else if ( !strcmp(sval,"ORDERING") ) {
1357                                 if ( seen_ordering ) {
1358                                         *code = LDAP_SCHERR_DUPOPT;
1359                                         *errp = ss;
1360                                         ldap_attributetype_free(at);
1361                                         return(NULL);
1362                                 }
1363                                 seen_ordering = 1;
1364                                 at->at_ordering_oid = parse_woid(&ss,code);
1365                                 if ( !at->at_ordering_oid ) {
1366                                         *errp = ss;
1367                                         ldap_attributetype_free(at);
1368                                         return NULL;
1369                                 }
1370                         } else if ( !strcmp(sval,"SUBSTR") ) {
1371                                 if ( seen_substr ) {
1372                                         *code = LDAP_SCHERR_DUPOPT;
1373                                         *errp = ss;
1374                                         ldap_attributetype_free(at);
1375                                         return(NULL);
1376                                 }
1377                                 seen_substr = 1;
1378                                 at->at_substr_oid = parse_woid(&ss,code);
1379                                 if ( !at->at_substr_oid ) {
1380                                         *errp = ss;
1381                                         ldap_attributetype_free(at);
1382                                         return NULL;
1383                                 }
1384                         } else if ( !strcmp(sval,"SYNTAX") ) {
1385                                 if ( seen_syntax ) {
1386                                         *code = LDAP_SCHERR_DUPOPT;
1387                                         *errp = ss;
1388                                         ldap_attributetype_free(at);
1389                                         return(NULL);
1390                                 }
1391                                 seen_syntax = 1;
1392                                 parse_whsp(&ss);
1393                                 at->at_syntax_oid =
1394                                         parse_noidlen(&ss,
1395                                                       code,
1396                                                       &at->at_syntax_len,
1397                                                       be_liberal);
1398                                 if ( !at->at_syntax_oid ) {
1399                                         *errp = ss;
1400                                         ldap_attributetype_free(at);
1401                                         return NULL;
1402                                 }
1403                                 parse_whsp(&ss);
1404                         } else if ( !strcmp(sval,"SINGLE-VALUE") ) {
1405                                 if ( at->at_single_value ) {
1406                                         *code = LDAP_SCHERR_DUPOPT;
1407                                         *errp = ss;
1408                                         ldap_attributetype_free(at);
1409                                         return(NULL);
1410                                 }
1411                                 at->at_single_value = LDAP_SCHEMA_YES;
1412                                 parse_whsp(&ss);
1413                         } else if ( !strcmp(sval,"COLLECTIVE") ) {
1414                                 if ( at->at_collective ) {
1415                                         *code = LDAP_SCHERR_DUPOPT;
1416                                         *errp = ss;
1417                                         ldap_attributetype_free(at);
1418                                         return(NULL);
1419                                 }
1420                                 at->at_collective = LDAP_SCHEMA_YES;
1421                                 parse_whsp(&ss);
1422                         } else if ( !strcmp(sval,"NO-USER-MODIFICATION") ) {
1423                                 if ( at->at_no_user_mod ) {
1424                                         *code = LDAP_SCHERR_DUPOPT;
1425                                         *errp = ss;
1426                                         ldap_attributetype_free(at);
1427                                         return(NULL);
1428                                 }
1429                                 at->at_no_user_mod = LDAP_SCHEMA_YES;
1430                                 parse_whsp(&ss);
1431                         } else if ( !strcmp(sval,"USAGE") ) {
1432                                 if ( seen_usage ) {
1433                                         *code = LDAP_SCHERR_DUPOPT;
1434                                         *errp = ss;
1435                                         ldap_attributetype_free(at);
1436                                         return(NULL);
1437                                 }
1438                                 seen_usage = 1;
1439                                 parse_whsp(&ss);
1440                                 kind = get_token(&ss,&sval);
1441                                 if ( kind != TK_BAREWORD ) {
1442                                         *code = LDAP_SCHERR_UNEXPTOKEN;
1443                                         *errp = ss;
1444                                         ldap_attributetype_free(at);
1445                                         return NULL;
1446                                 }
1447                                 if ( !strcasecmp(sval,"userApplications") )
1448                                         at->at_usage =
1449                                             LDAP_SCHEMA_USER_APPLICATIONS;
1450                                 else if ( !strcasecmp(sval,"directoryOperation") )
1451                                         at->at_usage =
1452                                             LDAP_SCHEMA_DIRECTORY_OPERATION;
1453                                 else if ( !strcasecmp(sval,"distributedOperation") )
1454                                         at->at_usage =
1455                                             LDAP_SCHEMA_DISTRIBUTED_OPERATION;
1456                                 else if ( !strcasecmp(sval,"dSAOperation") )
1457                                         at->at_usage =
1458                                             LDAP_SCHEMA_DSA_OPERATION;
1459                                 else {
1460                                         *code = LDAP_SCHERR_UNEXPTOKEN;
1461                                         *errp = ss;
1462                                         ldap_attributetype_free(at);
1463                                         return NULL;
1464                                 }
1465                                 parse_whsp(&ss);
1466                         } else if ( sval[0] == 'X' && sval[1] == '-' ) {
1467                                 /* Should be parse_qdstrings */
1468                                 ssdummy = parse_qdescrs(&ss, code);
1469                                 if ( !ssdummy ) {
1470                                         *errp = ss;
1471                                         ldap_attributetype_free(at);
1472                                         return NULL;
1473                                 }
1474                         } else {
1475                                 *code = LDAP_SCHERR_UNEXPTOKEN;
1476                                 *errp = ss;
1477                                 ldap_attributetype_free(at);
1478                                 return NULL;
1479                         }
1480                         break;
1481                 default:
1482                         *code = LDAP_SCHERR_UNEXPTOKEN;
1483                         *errp = ss;
1484                         ldap_attributetype_free(at);
1485                         return NULL;
1486                 }
1487         }
1488 }
1489
1490 void
1491 ldap_objectclass_free(LDAP_OBJECT_CLASS * oc)
1492 {
1493         LDAP_FREE(oc->oc_oid);
1494         LDAP_VFREE(oc->oc_names);
1495         LDAP_FREE(oc->oc_desc);
1496         LDAP_VFREE(oc->oc_sup_oids);
1497         LDAP_VFREE(oc->oc_at_oids_must);
1498         LDAP_VFREE(oc->oc_at_oids_may);
1499         LDAP_FREE(oc);
1500 }
1501
1502 LDAP_OBJECT_CLASS *
1503 ldap_str2objectclass( const char * s, int * code, const char ** errp )
1504 {
1505         int kind;
1506         const char * ss = s;
1507         char * sval;
1508         int be_liberal = 1;     /* Future additional argument */
1509         int seen_name = 0;
1510         int seen_desc = 0;
1511         int seen_obsolete = 0;
1512         int seen_sup = 0;
1513         int seen_kind = 0;
1514         int seen_must = 0;
1515         int seen_may = 0;
1516         LDAP_OBJECT_CLASS * oc;
1517         char ** ssdummy;
1518         const char * savepos;
1519
1520         if ( !s ) {
1521                 *code = LDAP_SCHERR_EMPTY;
1522                 *errp = "";
1523                 return NULL;
1524         }
1525
1526         *errp = s;
1527         oc = LDAP_CALLOC(1,sizeof(LDAP_OBJECT_CLASS));
1528
1529         if ( !oc ) {
1530                 *code = LDAP_SCHERR_OUTOFMEM;
1531                 return NULL;
1532         }
1533
1534         kind = get_token(&ss,&sval);
1535         if ( kind != TK_LEFTPAREN ) {
1536                 *code = LDAP_SCHERR_NOLEFTPAREN;
1537                 ldap_objectclass_free(oc);
1538                 return NULL;
1539         }
1540
1541         /*
1542          * Definitions MUST begin with an OID in the numericoid format.
1543          * However, this routine is used by clients to parse the response
1544          * from servers and very well known servers will provide an OID
1545          * in the wrong format or even no OID at all.  We do our best to
1546          * extract info from those servers.
1547          */
1548         parse_whsp(&ss);
1549         savepos = ss;
1550         oc->oc_oid = parse_numericoid(&ss,code,0);
1551         if ( !oc->oc_oid ) {
1552                 if ( be_liberal ) {
1553                         /* Backtracking */
1554                         ss = savepos;
1555                         kind = get_token(&ss,&sval);
1556                         if ( kind == TK_BAREWORD ) {
1557                                 if ( !strcmp(sval, "NAME") ||
1558                                      !strcmp(sval, "DESC") ||
1559                                      !strcmp(sval, "OBSOLETE") ||
1560                                      !strcmp(sval, "SUP") ||
1561                                      !strcmp(sval, "ABSTRACT") ||
1562                                      !strcmp(sval, "STRUCTURAL") ||
1563                                      !strcmp(sval, "AUXILIARY") ||
1564                                      !strcmp(sval, "MUST") ||
1565                                      !strncmp(sval, "X-", 2) ) {
1566                                         /* Missing OID, backtrack */
1567                                         ss = savepos;
1568                                 } else {
1569                                         /* Non-numerical OID, ignore */
1570                                 }
1571                           }
1572                 } else {
1573                         *errp = ss;
1574                         ldap_objectclass_free(oc);
1575                         return NULL;
1576                 }
1577         }
1578         parse_whsp(&ss);
1579
1580         /*
1581          * Beyond this point we will be liberal an accept the items
1582          * in any order.
1583          */
1584         while (1) {
1585                 kind = get_token(&ss,&sval);
1586                 switch (kind) {
1587                 case TK_EOS:
1588                         *code = LDAP_SCHERR_NORIGHTPAREN;
1589                         *errp = ss;
1590                         ldap_objectclass_free(oc);
1591                         return NULL;
1592                 case TK_RIGHTPAREN:
1593                         return oc;
1594                 case TK_BAREWORD:
1595                         if ( !strcmp(sval,"NAME") ) {
1596                                 if ( seen_name ) {
1597                                         *code = LDAP_SCHERR_DUPOPT;
1598                                         *errp = ss;
1599                                         ldap_objectclass_free(oc);
1600                                         return(NULL);
1601                                 }
1602                                 seen_name = 1;
1603                                 oc->oc_names = parse_qdescrs(&ss,code);
1604                                 if ( !oc->oc_names ) {
1605                                         if ( *code != LDAP_SCHERR_OUTOFMEM )
1606                                                 *code = LDAP_SCHERR_BADNAME;
1607                                         *errp = ss;
1608                                         ldap_objectclass_free(oc);
1609                                         return NULL;
1610                                 }
1611                         } else if ( !strcmp(sval,"DESC") ) {
1612                                 if ( seen_desc ) {
1613                                         *code = LDAP_SCHERR_DUPOPT;
1614                                         *errp = ss;
1615                                         ldap_objectclass_free(oc);
1616                                         return(NULL);
1617                                 }
1618                                 seen_desc = 1;
1619                                 parse_whsp(&ss);
1620                                 kind = get_token(&ss,&sval);
1621                                 if ( kind != TK_QDSTRING ) {
1622                                         *code = LDAP_SCHERR_UNEXPTOKEN;
1623                                         *errp = ss;
1624                                         ldap_objectclass_free(oc);
1625                                         return NULL;
1626                                 }
1627                                 oc->oc_desc = sval;
1628                                 parse_whsp(&ss);
1629                         } else if ( !strcmp(sval,"OBSOLETE") ) {
1630                                 if ( seen_obsolete ) {
1631                                         *code = LDAP_SCHERR_DUPOPT;
1632                                         *errp = ss;
1633                                         ldap_objectclass_free(oc);
1634                                         return(NULL);
1635                                 }
1636                                 seen_obsolete = 1;
1637                                 oc->oc_obsolete = LDAP_SCHEMA_YES;
1638                                 parse_whsp(&ss);
1639                         } else if ( !strcmp(sval,"SUP") ) {
1640                                 if ( seen_sup ) {
1641                                         *code = LDAP_SCHERR_DUPOPT;
1642                                         *errp = ss;
1643                                         ldap_objectclass_free(oc);
1644                                         return(NULL);
1645                                 }
1646                                 seen_sup = 1;
1647                                 oc->oc_sup_oids = parse_oids(&ss,
1648                                                              code,
1649                                                              be_liberal);
1650                                 if ( !oc->oc_sup_oids ) {
1651                                         *errp = ss;
1652                                         ldap_objectclass_free(oc);
1653                                         return NULL;
1654                                 }
1655                         } else if ( !strcmp(sval,"ABSTRACT") ) {
1656                                 if ( seen_kind ) {
1657                                         *code = LDAP_SCHERR_DUPOPT;
1658                                         *errp = ss;
1659                                         ldap_objectclass_free(oc);
1660                                         return(NULL);
1661                                 }
1662                                 seen_kind = 1;
1663                                 oc->oc_kind = LDAP_SCHEMA_ABSTRACT;
1664                                 parse_whsp(&ss);
1665                         } else if ( !strcmp(sval,"STRUCTURAL") ) {
1666                                 if ( seen_kind ) {
1667                                         *code = LDAP_SCHERR_DUPOPT;
1668                                         *errp = ss;
1669                                         ldap_objectclass_free(oc);
1670                                         return(NULL);
1671                                 }
1672                                 seen_kind = 1;
1673                                 oc->oc_kind = LDAP_SCHEMA_STRUCTURAL;
1674                                 parse_whsp(&ss);
1675                         } else if ( !strcmp(sval,"AUXILIARY") ) {
1676                                 if ( seen_kind ) {
1677                                         *code = LDAP_SCHERR_DUPOPT;
1678                                         *errp = ss;
1679                                         ldap_objectclass_free(oc);
1680                                         return(NULL);
1681                                 }
1682                                 seen_kind = 1;
1683                                 oc->oc_kind = LDAP_SCHEMA_AUXILIARY;
1684                                 parse_whsp(&ss);
1685                         } else if ( !strcmp(sval,"MUST") ) {
1686                                 if ( seen_must ) {
1687                                         *code = LDAP_SCHERR_DUPOPT;
1688                                         *errp = ss;
1689                                         ldap_objectclass_free(oc);
1690                                         return(NULL);
1691                                 }
1692                                 seen_must = 1;
1693                                 oc->oc_at_oids_must = parse_oids(&ss,code,0);
1694                                 if ( !oc->oc_at_oids_must ) {
1695                                         *errp = ss;
1696                                         ldap_objectclass_free(oc);
1697                                         return NULL;
1698                                 }
1699                                 parse_whsp(&ss);
1700                         } else if ( !strcmp(sval,"MAY") ) {
1701                                 if ( seen_may ) {
1702                                         *code = LDAP_SCHERR_DUPOPT;
1703                                         *errp = ss;
1704                                         ldap_objectclass_free(oc);
1705                                         return(NULL);
1706                                 }
1707                                 seen_may = 1;
1708                                 oc->oc_at_oids_may = parse_oids(&ss,code,0);
1709                                 if ( !oc->oc_at_oids_may ) {
1710                                         *errp = ss;
1711                                         ldap_objectclass_free(oc);
1712                                         return NULL;
1713                                 }
1714                                 parse_whsp(&ss);
1715                         } else if ( sval[0] == 'X' && sval[1] == '-' ) {
1716                                 /* Should be parse_qdstrings */
1717                                 ssdummy = parse_qdescrs(&ss, code);
1718                                 if ( !ssdummy ) {
1719                                         *errp = ss;
1720                                         ldap_objectclass_free(oc);
1721                                         return NULL;
1722                                 }
1723                         } else {
1724                                 *code = LDAP_SCHERR_UNEXPTOKEN;
1725                                 *errp = ss;
1726                                 ldap_objectclass_free(oc);
1727                                 return NULL;
1728                         }
1729                         break;
1730                 default:
1731                         *code = LDAP_SCHERR_UNEXPTOKEN;
1732                         *errp = ss;
1733                         ldap_objectclass_free(oc);
1734                         return NULL;
1735                 }
1736         }
1737 }
1738
1739 static char *err2text[] = {
1740         "",
1741         "Out of memory",
1742         "Unexpected token",
1743         "Missing opening parenthesis",
1744         "Missing closing parenthesis",
1745         "Expecting digit",
1746         "Expecting a name",
1747         "Bad description",
1748         "Bad superiors",
1749         "Duplicate option",
1750         "Unexpected end of data"
1751 };
1752
1753 char *
1754 ldap_scherr2str(int code)
1755 {
1756         if ( code < 1 || code >= (sizeof(err2text)/sizeof(char *)) ) {
1757                 return "Unknown error";
1758         } else {
1759                 return err2text[code];
1760         }
1761 }