git.sur5r.net Git - openldap/blob - servers/slapd/back-sql/util.c

   1 /* $OpenLDAP$ */
   2 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   3  *
   4  * Copyright 1999-2016 The OpenLDAP Foundation.
   5  * Portions Copyright 1999 Dmitry Kovalev.
   6  * Portions Copyright 2002 Pierangelo Masarati.
   7  * All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted only as authorized by the OpenLDAP
  11  * Public License.
  12  *
  13  * A copy of this license is available in the file LICENSE in the
  14  * top-level directory of the distribution or, alternatively, at
  15  * <http://www.OpenLDAP.org/license.html>.
  16  */
  17 /* ACKNOWLEDGEMENTS:
  18  * This work was initially developed by Dmitry Kovalev for inclusion
  19  * by OpenLDAP Software.  Additional significant contributors include
  20  * Pierangelo Masarati.
  21  */
  22
  23 #include "portable.h"
  24
  25 #include <stdio.h>
  26 #include <sys/types.h>
  27 #include "ac/string.h"
  28 #include "ac/ctype.h"
  29 #include "ac/stdarg.h"
  30
  31 #include "slap.h"
  32 #include "proto-sql.h"
  33 #include "lutil.h"
  34
  35 #define BACKSQL_MAX(a,b) ((a)>(b)?(a):(b))
  36 #define BACKSQL_MIN(a,b) ((a)<(b)?(a):(b))
  37
  38 #define BACKSQL_STR_GROW 256
  39
  40 const char backsql_def_oc_query[] =
  41         "SELECT id,name,keytbl,keycol,create_proc,delete_proc,expect_return "
  42         "FROM ldap_oc_mappings";
  43 const char backsql_def_needs_select_oc_query[] =
  44         "SELECT id,name,keytbl,keycol,create_proc,create_keyval,delete_proc,"
  45         "expect_return FROM ldap_oc_mappings";
  46 const char backsql_def_at_query[] =
  47         "SELECT name,sel_expr,from_tbls,join_where,add_proc,delete_proc,"
  48         "param_order,expect_return,sel_expr_u FROM ldap_attr_mappings "
  49         "WHERE oc_map_id=?";
  50 const char backsql_def_delentry_stmt[] = "DELETE FROM ldap_entries WHERE id=?";
  51 const char backsql_def_renentry_stmt[] =
  52         "UPDATE ldap_entries SET dn=?,parent=?,keyval=? WHERE id=?";
  53 const char backsql_def_insentry_stmt[] =
  54         "INSERT INTO ldap_entries (dn,oc_map_id,parent,keyval) "
  55         "VALUES (?,?,?,?)";
  56 const char backsql_def_delobjclasses_stmt[] = "DELETE FROM ldap_entry_objclasses "
  57         "WHERE entry_id=?";
  58 const char backsql_def_subtree_cond[] = "ldap_entries.dn LIKE CONCAT('%',?)";
  59 const char backsql_def_upper_subtree_cond[] = "(ldap_entries.dn) LIKE CONCAT('%',?)";
  60 const char backsql_id_query[] = "SELECT id,keyval,oc_map_id,dn FROM ldap_entries WHERE ";
  61 /* better ?||? or cast(?||? as varchar) */
  62 const char backsql_def_concat_func[] = "CONCAT(?,?)";
  63
  64 /* TimesTen */
  65 const char backsql_check_dn_ru_query[] = "SELECT dn_ru FROM ldap_entries";
  66
  67 struct berbuf *
  68 backsql_strcat_x( struct berbuf *dest, void *memctx, ... )
  69 {
  70         va_list         strs;
  71         ber_len_t       cdlen, cslen, grow;
  72         char            *cstr;
  73
  74         assert( dest != NULL );
  75         assert( dest->bb_val.bv_val == NULL
  76                         || dest->bb_val.bv_len == strlen( dest->bb_val.bv_val ) );
  77
  78 #ifdef BACKSQL_TRACE
  79         Debug( LDAP_DEBUG_TRACE, "==>backsql_strcat()\n", 0, 0, 0 );
  80 #endif /* BACKSQL_TRACE */
  81
  82         va_start( strs, memctx );
  83         if ( dest->bb_val.bv_val == NULL || dest->bb_len == 0 ) {
  84                 dest->bb_val.bv_val = (char *)ber_memalloc_x( BACKSQL_STR_GROW * sizeof( char ), memctx );
  85                 dest->bb_val.bv_len = 0;
  86                 dest->bb_len = BACKSQL_STR_GROW;
  87         }
  88         cdlen = dest->bb_val.bv_len;
  89         while ( ( cstr = va_arg( strs, char * ) ) != NULL ) {
  90                 cslen = strlen( cstr );
  91                 grow = BACKSQL_MAX( BACKSQL_STR_GROW, cslen );
  92                 if ( dest->bb_len - cdlen <= cslen ) {
  93                         char    *tmp_dest;
  94
  95 #ifdef BACKSQL_TRACE
  96                         Debug( LDAP_DEBUG_TRACE, "backsql_strcat(): "
  97                                 "buflen=%d, cdlen=%d, cslen=%d "
  98                                 "-- reallocating dest\n",
  99                                 dest->bb_len, cdlen + 1, cslen );
 100 #endif /* BACKSQL_TRACE */
 101
 102                         tmp_dest = (char *)ber_memrealloc_x( dest->bb_val.bv_val,
 103                                         dest->bb_len + grow * sizeof( char ), memctx );
 104                         if ( tmp_dest == NULL ) {
 105                                 Debug( LDAP_DEBUG_ANY, "backsql_strcat(): "
 106                                         "could not reallocate string buffer.\n",
 107                                         0, 0, 0 );
 108                                 va_end( strs );
 109                                 return NULL;
 110                         }
 111                         dest->bb_val.bv_val = tmp_dest;
 112                         dest->bb_len += grow;
 113
 114 #ifdef BACKSQL_TRACE
 115                         Debug( LDAP_DEBUG_TRACE, "backsql_strcat(): "
 116                                 "new buflen=%d, dest=%p\n",
 117                                 dest->bb_len, dest, 0 );
 118 #endif /* BACKSQL_TRACE */
 119                 }
 120                 AC_MEMCPY( dest->bb_val.bv_val + cdlen, cstr, cslen + 1 );
 121                 cdlen += cslen;
 122         }
 123         va_end( strs );
 124
 125 #ifdef BACKSQL_TRACE
 126         Debug( LDAP_DEBUG_TRACE, "<==backsql_strcat() (dest=\"%s\")\n",
 127                         dest->bb_val.bv_val, 0, 0 );
 128 #endif /* BACKSQL_TRACE */
 129
 130         dest->bb_val.bv_len = cdlen;
 131
 132         return dest;
 133 }
 134
 135 struct berbuf *
 136 backsql_strfcat_x( struct berbuf *dest, void *memctx, const char *fmt, ... )
 137 {
 138         va_list         strs;
 139         ber_len_t       cdlen;
 140
 141         assert( dest != NULL );
 142         assert( fmt != NULL );
 143         assert( dest->bb_len == 0 || dest->bb_len > dest->bb_val.bv_len );
 144         assert( dest->bb_val.bv_val == NULL
 145                         || dest->bb_val.bv_len == strlen( dest->bb_val.bv_val ) );
 146
 147 #ifdef BACKSQL_TRACE
 148         Debug( LDAP_DEBUG_TRACE, "==>backsql_strfcat()\n", 0, 0, 0 );
 149 #endif /* BACKSQL_TRACE */
 150
 151         va_start( strs, fmt );
 152         if ( dest->bb_val.bv_val == NULL || dest->bb_len == 0 ) {
 153                 dest->bb_val.bv_val = (char *)ber_memalloc_x( BACKSQL_STR_GROW * sizeof( char ), memctx );
 154                 dest->bb_val.bv_len = 0;
 155                 dest->bb_len = BACKSQL_STR_GROW;
 156         }
 157
 158         cdlen = dest->bb_val.bv_len;
 159         for ( ; fmt[0]; fmt++ ) {
 160                 ber_len_t       cslen, grow;
 161                 char            *cstr, cc[ 2 ] = { '\0', '\0' };
 162                 struct berval   *cbv;
 163
 164                 switch ( fmt[ 0 ] ) {
 165
 166                 /* berval */
 167                 case 'b':
 168                         cbv = va_arg( strs, struct berval * );
 169                         cstr = cbv->bv_val;
 170                         cslen = cbv->bv_len;
 171                         break;
 172
 173                 /* length + string */
 174                 case 'l':
 175                         cslen = va_arg( strs, ber_len_t );
 176                         cstr = va_arg( strs, char * );
 177                         break;
 178
 179                 /* string */
 180                 case 's':
 181                         cstr = va_arg( strs, char * );
 182                         cslen = strlen( cstr );
 183                         break;
 184
 185                 /* char */
 186                 case 'c':
 187                         /*
 188                          * `char' is promoted to `int' when passed through `...'
 189                          */
 190                         cc[0] = va_arg( strs, int );
 191                         cstr = cc;
 192                         cslen = 1;
 193                         break;
 194
 195                 default:
 196                         assert( 0 );
 197                 }
 198
 199                 grow = BACKSQL_MAX( BACKSQL_STR_GROW, cslen );
 200                 if ( dest->bb_len - cdlen <= cslen ) {
 201                         char    *tmp_dest;
 202
 203 #ifdef BACKSQL_TRACE
 204                         Debug( LDAP_DEBUG_TRACE, "backsql_strfcat(): "
 205                                 "buflen=%d, cdlen=%d, cslen=%d "
 206                                 "-- reallocating dest\n",
 207                                 dest->bb_len, cdlen + 1, cslen );
 208 #endif /* BACKSQL_TRACE */
 209
 210                         tmp_dest = (char *)ber_memrealloc_x( dest->bb_val.bv_val,
 211                                         ( dest->bb_len ) + grow * sizeof( char ), memctx );
 212                         if ( tmp_dest == NULL ) {
 213                                 Debug( LDAP_DEBUG_ANY, "backsql_strfcat(): "
 214                                         "could not reallocate string buffer.\n",
 215                                         0, 0, 0 );
 216                                 va_end( strs );
 217                                 return NULL;
 218                         }
 219                         dest->bb_val.bv_val = tmp_dest;
 220                         dest->bb_len += grow * sizeof( char );
 221
 222 #ifdef BACKSQL_TRACE
 223                         Debug( LDAP_DEBUG_TRACE, "backsql_strfcat(): "
 224                                 "new buflen=%d, dest=%p\n", dest->bb_len, dest, 0 );
 225 #endif /* BACKSQL_TRACE */
 226                 }
 227
 228                 assert( cstr != NULL );
 229
 230                 AC_MEMCPY( dest->bb_val.bv_val + cdlen, cstr, cslen + 1 );
 231                 cdlen += cslen;
 232         }
 233
 234         va_end( strs );
 235
 236 #ifdef BACKSQL_TRACE
 237         Debug( LDAP_DEBUG_TRACE, "<==backsql_strfcat() (dest=\"%s\")\n",
 238                         dest->bb_val.bv_val, 0, 0 );
 239 #endif /* BACKSQL_TRACE */
 240
 241         dest->bb_val.bv_len = cdlen;
 242
 243         return dest;
 244 }
 245
 246 int
 247 backsql_entry_addattr(
 248         Entry                   *e,
 249         AttributeDescription    *ad,
 250         struct berval           *val,
 251         void                    *memctx )
 252 {
 253         int                     rc;
 254
 255 #ifdef BACKSQL_TRACE
 256         Debug( LDAP_DEBUG_TRACE, "backsql_entry_addattr(\"%s\"): %s=%s\n",
 257                 e->e_name.bv_val, ad->ad_cname.bv_val, val->bv_val );
 258 #endif /* BACKSQL_TRACE */
 259
 260         rc = attr_merge_normalize_one( e, ad, val, memctx );
 261
 262         if ( rc != LDAP_SUCCESS ) {
 263                 Debug( LDAP_DEBUG_TRACE, "backsql_entry_addattr(\"%s\"): "
 264                         "failed to merge value \"%s\" for attribute \"%s\"\n",
 265                         e->e_name.bv_val, val->bv_val, ad->ad_cname.bv_val );
 266                 return rc;
 267         }
 268
 269 #ifdef BACKSQL_TRACE
 270         Debug( LDAP_DEBUG_TRACE, "<==backsql_entry_addattr(\"%s\")\n",
 271                 e->e_name.bv_val, 0, 0 );
 272 #endif /* BACKSQL_TRACE */
 273
 274         return LDAP_SUCCESS;
 275 }
 276
 277 static char *
 278 backsql_get_table_spec( backsql_info *bi, char **p )
 279 {
 280         char            *s, *q;
 281         struct berbuf   res = BB_NULL;
 282
 283         assert( p != NULL );
 284         assert( *p != NULL );
 285
 286         s = *p;
 287         while ( **p && **p != ',' ) {
 288                 (*p)++;
 289         }
 290
 291         if ( **p ) {
 292                 *(*p)++ = '\0';
 293         }
 294
 295 #define BACKSQL_NEXT_WORD { \
 296                 while ( *s && isspace( (unsigned char)*s ) ) s++; \
 297                 if ( !*s ) return res.bb_val.bv_val; \
 298                 q = s; \
 299                 while ( *q && !isspace( (unsigned char)*q ) ) q++; \
 300                 if ( *q ) *q++='\0'; \
 301         }
 302
 303         BACKSQL_NEXT_WORD;
 304         /* table name */
 305         backsql_strcat_x( &res, NULL, s, NULL );
 306         s = q;
 307
 308         BACKSQL_NEXT_WORD;
 309         if ( strcasecmp( s, "AS" ) == 0 ) {
 310                 s = q;
 311                 BACKSQL_NEXT_WORD;
 312         }
 313
 314         /* oracle doesn't understand "AS" :( and other RDBMSes don't need it */
 315         backsql_strfcat_x( &res, NULL, "lbbsb",
 316                         STRLENOF( " " ), " ",
 317                         &bi->sql_aliasing,
 318                         &bi->sql_aliasing_quote,
 319                         s,
 320                         &bi->sql_aliasing_quote );
 321
 322         return res.bb_val.bv_val;
 323 }
 324
 325 int
 326 backsql_merge_from_clause(
 327         backsql_info    *bi,
 328         struct berbuf   *dest_from,
 329         struct berval   *src_from )
 330 {
 331         char            *s, *p, *srcc, *pos, e;
 332         struct berbuf   res = BB_NULL;
 333
 334 #ifdef BACKSQL_TRACE
 335         Debug( LDAP_DEBUG_TRACE, "==>backsql_merge_from_clause(): "
 336                 "dest_from=\"%s\",src_from=\"%s\"\n",
 337                 dest_from ? dest_from->bb_val.bv_val : "<NULL>",
 338                 src_from->bv_val, 0 );
 339 #endif /* BACKSQL_TRACE */
 340
 341         srcc = ch_strdup( src_from->bv_val );
 342         p = srcc;
 343
 344         if ( dest_from != NULL ) {
 345                 res = *dest_from;
 346         }
 347
 348         while ( *p ) {
 349                 s = backsql_get_table_spec( bi, &p );
 350
 351 #ifdef BACKSQL_TRACE
 352                 Debug( LDAP_DEBUG_TRACE, "backsql_merge_from_clause(): "
 353                         "p=\"%s\" s=\"%s\"\n", p, s, 0 );
 354 #endif /* BACKSQL_TRACE */
 355
 356                 if ( BER_BVISNULL( &res.bb_val ) ) {
 357                         backsql_strcat_x( &res, NULL, s, NULL );
 358
 359                 } else {
 360                         pos = strstr( res.bb_val.bv_val, s );
 361                         if ( pos == NULL || ( ( e = pos[ strlen( s ) ] ) != '\0' && e != ',' ) ) {
 362                                 backsql_strfcat_x( &res, NULL, "cs", ',', s );
 363                         }
 364                 }
 365
 366                 if ( s ) {
 367                         ch_free( s );
 368                 }
 369         }
 370
 371 #ifdef BACKSQL_TRACE
 372         Debug( LDAP_DEBUG_TRACE, "<==backsql_merge_from_clause()\n", 0, 0, 0 );
 373 #endif /* BACKSQL_TRACE */
 374
 375         free( srcc );
 376         *dest_from = res;
 377
 378         return 1;
 379 }
 380
 381 /*
 382  * splits a pattern in components separated by '?'
 383  * (double ?? are turned into single ? and left in the string)
 384  * expected contains the number of expected occurrences of '?'
 385  * (a negative value means parse as many as possible)
 386  */
 387
 388 int
 389 backsql_split_pattern(
 390         const char      *_pattern,
 391         BerVarray       *split_pattern,
 392         int             expected )
 393 {
 394         char            *pattern, *start, *end;
 395         struct berval   bv;
 396         int             rc = 0;
 397
 398 #define SPLIT_CHAR      '?'
 399
 400         assert( _pattern != NULL );
 401         assert( split_pattern != NULL );
 402
 403         pattern = ch_strdup( _pattern );
 404
 405         start = pattern;
 406         end = strchr( start, SPLIT_CHAR );
 407         for ( ; start; expected-- ) {
 408                 char            *real_end = end;
 409                 ber_len_t       real_len;
 410
 411                 if ( real_end == NULL ) {
 412                         real_end = start + strlen( start );
 413
 414                 } else if ( real_end[ 1 ] == SPLIT_CHAR ) {
 415                         expected++;
 416                         AC_MEMCPY( real_end, real_end + 1, strlen( real_end ) );
 417                         end = strchr( real_end + 1, SPLIT_CHAR );
 418                         continue;
 419                 }
 420
 421                 real_len = real_end - start;
 422                 if ( real_len == 0 ) {
 423                         ber_str2bv( "", 0, 1, &bv );
 424                 } else {
 425                         ber_str2bv( start, real_len, 1, &bv );
 426                 }
 427
 428                 ber_bvarray_add( split_pattern, &bv );
 429
 430                 if ( expected == 0 ) {
 431                         if ( end != NULL ) {
 432                                 rc = -1;
 433                                 goto done;
 434                         }
 435                         break;
 436                 }
 437
 438                 if ( end != NULL ) {
 439                         start = end + 1;
 440                         end = strchr( start, SPLIT_CHAR );
 441                 }
 442         }
 443
 444 done:;
 445
 446         ch_free( pattern );
 447
 448         return rc;
 449 }
 450
 451 int
 452 backsql_prepare_pattern(
 453         BerVarray       split_pattern,
 454         BerVarray       values,
 455         struct berval   *res )
 456 {
 457         int             i;
 458         struct berbuf   bb = BB_NULL;
 459
 460         assert( res != NULL );
 461
 462         for ( i = 0; values[i].bv_val; i++ ) {
 463                 if ( split_pattern[i].bv_val == NULL ) {
 464                         ch_free( bb.bb_val.bv_val );
 465                         return -1;
 466                 }
 467                 backsql_strfcat_x( &bb, NULL, "b", &split_pattern[ i ] );
 468                 backsql_strfcat_x( &bb, NULL, "b", &values[ i ] );
 469         }
 470
 471         if ( split_pattern[ i ].bv_val == NULL ) {
 472                 ch_free( bb.bb_val.bv_val );
 473                 return -1;
 474         }
 475
 476         backsql_strfcat_x( &bb, NULL, "b", &split_pattern[ i ] );
 477
 478         *res = bb.bb_val;
 479
 480         return 0;
 481 }
 482
 483 int
 484 backsql_entryUUID(
 485         backsql_info    *bi,
 486         backsql_entryID *id,
 487         struct berval   *entryUUID,
 488         void            *memctx )
 489 {
 490         char            uuidbuf[ LDAP_LUTIL_UUIDSTR_BUFSIZE ];
 491         struct berval   uuid;
 492 #ifdef BACKSQL_ARBITRARY_KEY
 493         int             i;
 494         ber_len_t       l, lmax;
 495 #endif /* BACKSQL_ARBITRARY_KEY */
 496
 497         /* entryUUID is generated as "%08x-%04x-%04x-0000-eaddrXXX"
 498          * with eid_oc_id as %08x and hi and lo eid_id as %04x-%04x */
 499         assert( bi != NULL );
 500         assert( id != NULL );
 501         assert( entryUUID != NULL );
 502
 503 #ifdef BACKSQL_ARBITRARY_KEY
 504         snprintf( uuidbuf, sizeof( uuidbuf ),
 505                         "%08x-0000-0000-0000-000000000000",
 506                         ( id->eid_oc_id & 0xFFFFFFFF ) );
 507         lmax = id->eid_keyval.bv_len < 12 ? id->eid_keyval.bv_len : 12;
 508         for ( l = 0, i = 9; l < lmax; l++, i += 2 ) {
 509                 switch ( i ) {
 510                 case STRLENOF( "00000000-0000" ):
 511                 case STRLENOF( "00000000-0000-0000" ):
 512                 case STRLENOF( "00000000-0000-0000-0000" ):
 513                         uuidbuf[ i++ ] = '-';
 514                 /* FALLTHRU */
 515
 516                 default:
 517                         snprintf( &uuidbuf[ i ], 3, "%2x", id->eid_keyval.bv_val[ l ] );
 518                         break;
 519                 }
 520         }
 521 #else /* ! BACKSQL_ARBITRARY_KEY */
 522         /* note: works only with 32 bit architectures... */
 523         snprintf( uuidbuf, sizeof( uuidbuf ),
 524                         "%08x-%04x-%04x-0000-000000000000",
 525                         ( (unsigned)id->eid_oc_id & 0xFFFFFFFF ),
 526                         ( ( (unsigned)id->eid_keyval & 0xFFFF0000 ) >> 020 /* 16 */ ),
 527                         ( (unsigned)id->eid_keyval & 0xFFFF ) );
 528 #endif /* ! BACKSQL_ARBITRARY_KEY */
 529
 530         uuid.bv_val = uuidbuf;
 531         uuid.bv_len = strlen( uuidbuf );
 532
 533         ber_dupbv_x( entryUUID, &uuid, memctx );
 534
 535         return 0;
 536 }
 537
 538 int
 539 backsql_entryUUID_decode(
 540         struct berval   *entryUUID,
 541         unsigned long   *oc_id,
 542 #ifdef BACKSQL_ARBITRARY_KEY
 543         struct berval   *keyval
 544 #else /* ! BACKSQL_ARBITRARY_KEY */
 545         unsigned long   *keyval
 546 #endif /* ! BACKSQL_ARBITRARY_KEY */
 547         )
 548 {
 549 #if 0
 550         fprintf( stderr, "==> backsql_entryUUID_decode()\n" );
 551 #endif
 552
 553         *oc_id = ( entryUUID->bv_val[0] << 030 /* 24 */ )
 554                 + ( entryUUID->bv_val[1] << 020 /* 16 */ )
 555                 + ( entryUUID->bv_val[2] << 010 /* 8 */ )
 556                 + entryUUID->bv_val[3];
 557
 558 #ifdef BACKSQL_ARBITRARY_KEY
 559         /* FIXME */
 560 #else /* ! BACKSQL_ARBITRARY_KEY */
 561         *keyval = ( entryUUID->bv_val[4] << 030 /* 24 */ )
 562                 + ( entryUUID->bv_val[5] << 020 /* 16 */ )
 563                 + ( entryUUID->bv_val[6] << 010 /* 8 */ )
 564                 + entryUUID->bv_val[7];
 565 #endif /* ! BACKSQL_ARBITRARY_KEY */
 566
 567 #if 0
 568         fprintf( stderr, "<== backsql_entryUUID_decode(): oc=%lu id=%lu\n",
 569                         *oc_id, *keyval );
 570 #endif
 571
 572         return LDAP_SUCCESS;
 573 }
 574