/* search.c - ldap backend search function */ /* $OpenLDAP$ */ /* * Copyright 1998-2003 The OpenLDAP Foundation, All Rights Reserved. * COPYING RESTRICTIONS APPLY, see COPYRIGHT file */ /* This is an altered version */ /* * Copyright 1999, Howard Chu, All rights reserved. * * Permission is granted to anyone to use this software for any purpose * on any computer system, and to alter it and redistribute it, subject * to the following restrictions: * * 1. The author is not responsible for the consequences of use of this * software, no matter how awful, even if they arise from flaws in it. * * 2. The origin of this software must not be misrepresented, either by * explicit claim or by omission. Since few users ever read sources, * credits should appear in the documentation. * * 3. Altered versions must be plainly marked as such, and must not be * misrepresented as being the original software. Since few users * ever read sources, credits should appear in the documentation. * * 4. This notice may not be removed or altered. * * * * Copyright 2000, Pierangelo Masarati, All rights reserved. * * This software is being modified by Pierangelo Masarati. * The previously reported conditions apply to the modified code as well. * Changes in the original code are highlighted where required. * Credits for the original code go to the author, Howard Chu. */ #include "portable.h" #include #include #include #include #include "slap.h" #include "back-ldap.h" #undef ldap_debug /* silence a warning in ldap-int.h */ #include "../../../libraries/libldap/ldap-int.h" static int ldap_send_entry( Backend *be, Operation *op, struct ldapconn *lc, LDAPMessage *e, AttributeName *attrs, int attrsonly ); int ldap_back_search( Backend *be, Connection *conn, Operation *op, struct berval *base, struct berval *nbase, int scope, int deref, int slimit, int tlimit, Filter *filter, struct berval *filterstr, AttributeName *attrs, int attrsonly ) { struct ldapinfo *li = (struct ldapinfo *) be->be_private; struct ldapconn *lc; struct timeval tv; LDAPMessage *res, *e; int count, rc = 0, msgid, sres = LDAP_SUCCESS; char *match = NULL, *err = NULL; char *mapped_filter = NULL, **mapped_attrs = NULL; struct berval mbase; #ifdef ENABLE_REWRITE char *mmatch = NULL; struct berval mfilter = { 0, NULL }; #endif /* ENABLE_REWRITE */ struct slap_limits_set *limit = NULL; int isroot = 0; BerVarray v2refs = NULL; lc = ldap_back_getconn(li, conn, op); if ( !lc ) { return( -1 ); } /* * controls are set in ldap_back_dobind() * * FIXME: in case of values return filter, we might want * to map attrs and maybe rewrite value */ if ( !ldap_back_dobind( lc, op ) ) { return( -1 ); } /* if not root, get appropriate limits */ if ( be_isroot( be, &op->o_ndn ) ) { isroot = 1; } else { ( void ) get_limits( be, &op->o_ndn, &limit ); } /* if no time limit requested, rely on remote server limits */ /* if requested limit higher than hard limit, abort */ if ( !isroot && tlimit > limit->lms_t_hard ) { /* no hard limit means use soft instead */ if ( limit->lms_t_hard == 0 && limit->lms_t_soft > -1 && tlimit > limit->lms_t_soft ) { tlimit = limit->lms_t_soft; /* positive hard limit means abort */ } else if ( limit->lms_t_hard > 0 ) { send_ldap_result( conn, op, LDAP_ADMINLIMIT_EXCEEDED, NULL, NULL, NULL, NULL ); rc = 0; goto finish; } /* negative hard limit means no limit */ } /* if no size limit requested, rely on remote server limits */ /* if requested limit higher than hard limit, abort */ if ( !isroot && slimit > limit->lms_s_hard ) { /* no hard limit means use soft instead */ if ( limit->lms_s_hard == 0 && limit->lms_s_soft > -1 && slimit > limit->lms_s_soft ) { slimit = limit->lms_s_soft; /* positive hard limit means abort */ } else if ( limit->lms_s_hard > 0 ) { send_ldap_result( conn, op, LDAP_ADMINLIMIT_EXCEEDED, NULL, NULL, NULL, NULL ); rc = 0; goto finish; } /* negative hard limit means no limit */ } /* should we check return values? */ if (deref != -1) ldap_set_option( lc->ld, LDAP_OPT_DEREF, (void *)&deref); if (tlimit != -1) ldap_set_option( lc->ld, LDAP_OPT_TIMELIMIT, (void *)&tlimit); if (slimit != -1) ldap_set_option( lc->ld, LDAP_OPT_SIZELIMIT, (void *)&slimit); /* * Rewrite the search base, if required */ #ifdef ENABLE_REWRITE switch ( rewrite_session( li->rwinfo, "searchBase", base->bv_val, conn, &mbase.bv_val ) ) { case REWRITE_REGEXEC_OK: if ( mbase.bv_val == NULL ) { mbase = *base; } #ifdef NEW_LOGGING LDAP_LOG( BACK_LDAP, DETAIL1, "[rw] searchBase: \"%s\" -> \"%s\"\n", base->bv_val, mbase.bv_val, 0 ); #else /* !NEW_LOGGING */ Debug( LDAP_DEBUG_ARGS, "rw> searchBase: \"%s\" -> \"%s\"\n%s", base->bv_val, mbase.bv_val, "" ); #endif /* !NEW_LOGGING */ break; case REWRITE_REGEXEC_UNWILLING: send_ldap_result( conn, op, LDAP_UNWILLING_TO_PERFORM, NULL, "Operation not allowed", NULL, NULL ); rc = -1; goto finish; case REWRITE_REGEXEC_ERR: send_ldap_result( conn, op, LDAP_OTHER, NULL, "Rewrite error", NULL, NULL ); rc = -1; goto finish; } /* * Rewrite the search filter, if required */ switch ( rewrite_session( li->rwinfo, "searchFilter", filterstr->bv_val, conn, &mfilter.bv_val ) ) { case REWRITE_REGEXEC_OK: if ( mfilter.bv_val == NULL || mfilter.bv_val[0] == '\0') { if ( mfilter.bv_val != NULL ) { free( mfilter.bv_val ); } mfilter = *filterstr; } else { mfilter.bv_len = strlen( mfilter.bv_val ); } #ifdef NEW_LOGGING LDAP_LOG( BACK_LDAP, DETAIL1, "[rw] searchFilter: \"%s\" -> \"%s\"\n", filterstr->bv_val, mfilter.bv_val, 0 ); #else /* !NEW_LOGGING */ Debug( LDAP_DEBUG_ARGS, "rw> searchFilter: \"%s\" -> \"%s\"\n%s", filterstr->bv_val, mfilter.bv_val, "" ); #endif /* !NEW_LOGGING */ break; case REWRITE_REGEXEC_UNWILLING: send_ldap_result( conn, op, LDAP_UNWILLING_TO_PERFORM, NULL, "Operation not allowed", NULL, NULL ); rc = -1; goto finish; case REWRITE_REGEXEC_ERR: send_ldap_result( conn, op, LDAP_OTHER, NULL, "Rewrite error", NULL, NULL ); rc = -1; goto finish; } #else /* !ENABLE_REWRITE */ ldap_back_dn_massage( li, base, &mbase, 0, 1 ); #endif /* !ENABLE_REWRITE */ mapped_filter = ldap_back_map_filter(&li->at_map, &li->oc_map, #ifdef ENABLE_REWRITE &mfilter, #else /* !ENABLE_REWRITE */ filterstr, #endif /* !ENABLE_REWRITE */ 0); if ( mapped_filter == NULL ) { #ifdef ENABLE_REWRITE mapped_filter = mfilter.bv_val; #else /* !ENABLE_REWRITE */ mapped_filter = filterstr->bv_val; #endif /* !ENABLE_REWRITE */ } #ifdef ENABLE_REWRITE if ( mfilter.bv_val != filterstr->bv_val ) { free( mfilter.bv_val ); } #endif /* ENABLE_REWRITE */ mapped_attrs = ldap_back_map_attrs(&li->at_map, attrs, 0); if ( mapped_attrs == NULL && attrs) { for (count=0; attrs[count].an_name.bv_val; count++); mapped_attrs = ch_malloc( (count+1) * sizeof(char *)); for (count=0; attrs[count].an_name.bv_val; count++) { mapped_attrs[count] = attrs[count].an_name.bv_val; } mapped_attrs[count] = NULL; } msgid = ldap_search(lc->ld, mbase.bv_val, scope, mapped_filter, mapped_attrs, attrsonly); if ( msgid == -1 ) { fail:; rc = ldap_back_op_result(lc, op); goto finish; } /* We pull apart the ber result, stuff it into a slapd entry, and * let send_search_entry stuff it back into ber format. Slow & ugly, * but this is necessary for version matching, and for ACL processing. */ for ( count=0, rc=0; rc != -1; rc = ldap_result(lc->ld, msgid, 0, &tv, &res)) { /* check for abandon */ if (op->o_abandon) { ldap_abandon(lc->ld, msgid); rc = 0; goto finish; } if (rc == 0) { tv.tv_sec = 0; tv.tv_usec = 100000; ldap_pvt_thread_yield(); } else if (rc == LDAP_RES_SEARCH_ENTRY) { e = ldap_first_entry(lc->ld,res); if ( ldap_send_entry(be, op, lc, e, attrs, attrsonly) == LDAP_SUCCESS ) { count++; } ldap_msgfree(res); } else if ( rc == LDAP_RES_SEARCH_REFERENCE ) { char **references = NULL; LDAPControl **ctrls = NULL; BerVarray refs; int cnt; rc = ldap_parse_reference( lc->ld, res, &references, &ctrls, 1 ); if ( rc != LDAP_SUCCESS ) { continue; } if ( references == NULL ) { continue; } for ( cnt = 0; references[ cnt ]; cnt++ ) /* NO OP */ ; refs = ch_calloc( cnt + 1, sizeof( struct berval ) ); for ( cnt = 0; references[ cnt ]; cnt++ ) { refs[ cnt ].bv_val = references[ cnt ]; refs[ cnt ].bv_len = strlen( references[ cnt ] ); } /* ignore return value by now */ ( void )send_search_reference( be, conn, op, NULL, refs, ctrls, &v2refs ); /* cleanup */ if ( references ) { ldap_value_free( references ); ch_free( refs ); } if ( ctrls ) { ldap_controls_free( ctrls ); } } else { sres = ldap_result2error(lc->ld, res, 1); sres = ldap_back_map_result(sres); ldap_get_option(lc->ld, LDAP_OPT_ERROR_STRING, &err); ldap_get_option(lc->ld, LDAP_OPT_MATCHED_DN, &match); rc = 0; break; } } if (rc == -1) goto fail; #ifdef ENABLE_REWRITE /* * Rewrite the matched portion of the search base, if required */ if ( match != NULL ) { switch ( rewrite_session( li->rwinfo, "matchedDn", match, conn, &mmatch ) ) { case REWRITE_REGEXEC_OK: if ( mmatch == NULL ) { mmatch = ( char * )match; } #ifdef NEW_LOGGING LDAP_LOG( BACK_LDAP, DETAIL1, "[rw] matchedDn:" " \"%s\" -> \"%s\"\n", match, mmatch, 0 ); #else /* !NEW_LOGGING */ Debug( LDAP_DEBUG_ARGS, "rw> matchedDn:" " \"%s\" -> \"%s\"\n%s", match, mmatch, "" ); #endif /* !NEW_LOGGING */ break; case REWRITE_REGEXEC_UNWILLING: case REWRITE_REGEXEC_ERR: /* FIXME: no error, but no matched ... */ mmatch = NULL; break; } } if ( v2refs ) { sres = LDAP_REFERRAL; } send_search_result( conn, op, sres, mmatch, err, v2refs, NULL, count ); #else /* !ENABLE_REWRITE */ if ( v2refs ) { sres = LDAP_REFERRAL; } send_search_result( conn, op, sres, match, err, v2refs, NULL, count ); #endif /* !ENABLE_REWRITE */ finish:; if ( match ) { #ifdef ENABLE_REWRITE if ( mmatch != match ) { free( mmatch ); } #endif /* ENABLE_REWRITE */ LDAP_FREE(match); } if ( err ) { LDAP_FREE( err ); } if ( mapped_attrs ) { ch_free( mapped_attrs ); } if ( mapped_filter != filterstr->bv_val ) { ch_free( mapped_filter ); } if ( mbase.bv_val != base->bv_val ) { free( mbase.bv_val ); } return rc; } static int ldap_send_entry( Backend *be, Operation *op, struct ldapconn *lc, LDAPMessage *e, AttributeName *attrs, int attrsonly ) { struct ldapinfo *li = (struct ldapinfo *) be->be_private; struct berval a, mapped; Entry ent; BerElement ber = *e->lm_ber; Attribute *attr, **attrp; struct berval dummy = { 0, NULL }; struct berval *bv, bdn; const char *text; if ( ber_scanf( &ber, "{m{", &bdn ) == LBER_ERROR ) { return LDAP_DECODING_ERROR; } #ifdef ENABLE_REWRITE /* * Rewrite the dn of the result, if needed */ switch ( rewrite_session( li->rwinfo, "searchResult", bdn.bv_val, lc->conn, &ent.e_name.bv_val ) ) { case REWRITE_REGEXEC_OK: if ( ent.e_name.bv_val == NULL ) { ent.e_name = bdn; } else { #ifdef NEW_LOGGING LDAP_LOG( BACK_LDAP, DETAIL1, "[rw] searchResult: \"%s\"" " -> \"%s\"\n", bdn.bv_val, ent.e_dn, 0 ); #else /* !NEW_LOGGING */ Debug( LDAP_DEBUG_ARGS, "rw> searchResult: \"%s\"" " -> \"%s\"\n%s", bdn.bv_val, ent.e_dn, "" ); #endif /* !NEW_LOGGING */ ent.e_name.bv_len = strlen( ent.e_name.bv_val ); } break; case REWRITE_REGEXEC_ERR: case REWRITE_REGEXEC_UNWILLING: return LDAP_OTHER; } #else /* !ENABLE_REWRITE */ ldap_back_dn_massage( li, &bdn, &ent.e_name, 0, 0 ); #endif /* !ENABLE_REWRITE */ /* * Note: this may fail if the target host(s) schema differs * from the one known to the meta, and a DN with unknown * attributes is returned. * * FIXME: should we log anything, or delegate to dnNormalize2? */ if ( dnNormalize2( NULL, &ent.e_name, &ent.e_nname ) != LDAP_SUCCESS ) { return LDAP_INVALID_DN_SYNTAX; } ent.e_id = 0; ent.e_attrs = 0; ent.e_private = 0; attrp = &ent.e_attrs; while ( ber_scanf( &ber, "{m", &a ) != LBER_ERROR ) { ldap_back_map(&li->at_map, &a, &mapped, 1); if (mapped.bv_val == NULL) continue; attr = (Attribute *)ch_malloc( sizeof(Attribute) ); if (attr == NULL) continue; attr->a_flags = 0; attr->a_next = 0; attr->a_desc = NULL; if (slap_bv2ad(&mapped, &attr->a_desc, &text) != LDAP_SUCCESS) { if (slap_bv2undef_ad(&mapped, &attr->a_desc, &text) != LDAP_SUCCESS) { #ifdef NEW_LOGGING LDAP_LOG( BACK_LDAP, DETAIL1, "slap_bv2undef_ad(%s): %s\n", mapped.bv_val, text, 0 ); #else /* !NEW_LOGGING */ Debug( LDAP_DEBUG_ANY, "slap_bv2undef_ad(%s): " "%s\n%s", mapped.bv_val, text, "" ); #endif /* !NEW_LOGGING */ ch_free(attr); continue; } } /* no subschemaSubentry */ if ( attr->a_desc == slap_schema.si_ad_subschemaSubentry ) { ch_free(attr); continue; } if ( ber_scanf( &ber, "[W]", &attr->a_vals ) == LBER_ERROR || attr->a_vals == NULL ) { /* * Note: attr->a_vals can be null when using * values result filter */ attr->a_vals = &dummy; } else if ( attr->a_desc == slap_schema.si_ad_objectClass || attr->a_desc == slap_schema.si_ad_structuralObjectClass ) { int i, last; for ( last = 0; attr->a_vals[last].bv_val; last++ ) ; for ( i = 0, bv = attr->a_vals; bv->bv_val; bv++, i++ ) { ldap_back_map(&li->oc_map, bv, &mapped, 1); if (mapped.bv_val == NULL) { LBER_FREE(bv->bv_val); bv->bv_val = NULL; if (--last < 0) break; *bv = attr->a_vals[last]; attr->a_vals[last].bv_val = NULL; i--; } else if ( mapped.bv_val != bv->bv_val ) { /* * FIXME: after LBER_FREEing * the value is replaced by * ch_alloc'ed memory */ LBER_FREE(bv->bv_val); ber_dupbv( bv, &mapped ); } } /* * It is necessary to try to rewrite attributes with * dn syntax because they might be used in ACLs as * members of groups; since ACLs are applied to the * rewritten stuff, no dn-based subject clause could * be used at the ldap backend side (see * http://www.OpenLDAP.org/faq/data/cache/452.html) * The problem can be overcome by moving the dn-based * ACLs to the target directory server, and letting * everything pass thru the ldap backend. */ } else if ( strcmp( attr->a_desc->ad_type->sat_syntax->ssyn_oid, SLAPD_DN_SYNTAX ) == 0 ) { int i; for ( i = 0, bv = attr->a_vals; bv->bv_val; bv++, i++ ) { struct berval newval; #ifdef ENABLE_REWRITE switch ( rewrite_session( li->rwinfo, "searchResult", bv->bv_val, lc->conn, &newval.bv_val )) { case REWRITE_REGEXEC_OK: /* left as is */ if ( newval.bv_val == NULL ) { break; } newval.bv_len = strlen( newval.bv_val ); #ifdef NEW_LOGGING LDAP_LOG( BACK_LDAP, DETAIL1, "[rw] searchResult on attr=%s: \"%s\" -> \"%s\"\n", attr->a_desc->ad_type->sat_cname.bv_val, bv->bv_val, newval.bv_val ); #else /* !NEW_LOGGING */ Debug( LDAP_DEBUG_ARGS, "rw> searchResult on attr=%s: \"%s\" -> \"%s\"\n", attr->a_desc->ad_type->sat_cname.bv_val, bv->bv_val, newval.bv_val ); #endif /* !NEW_LOGGING */ free( bv->bv_val ); *bv = newval; break; case REWRITE_REGEXEC_UNWILLING: case REWRITE_REGEXEC_ERR: /* * FIXME: better give up, * skip the attribute * or leave it untouched? */ break; } #else /* !ENABLE_REWRITE */ ldap_back_dn_massage( li, bv, &newval, 0, 0 ); *bv = newval; #endif /* !ENABLE_REWRITE */ } } *attrp = attr; attrp = &attr->a_next; } send_search_entry( be, lc->conn, op, &ent, attrs, attrsonly, NULL ); while (ent.e_attrs) { attr = ent.e_attrs; ent.e_attrs = attr->a_next; if (attr->a_vals != &dummy) ber_bvarray_free(attr->a_vals); ch_free(attr); } if ( ent.e_dn && ( ent.e_dn != bdn.bv_val ) ) free( ent.e_dn ); if ( ent.e_ndn ) free( ent.e_ndn ); return LDAP_SUCCESS; }