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Diffstat (limited to 'servers/slapd/mods.c')
| -rw-r--r-- | servers/slapd/mods.c | 487 |
1 files changed, 487 insertions, 0 deletions
diff --git a/servers/slapd/mods.c b/servers/slapd/mods.c new file mode 100644 index 0000000..fbf821c --- /dev/null +++ b/servers/slapd/mods.c @@ -0,0 +1,487 @@ +/* $OpenLDAP$ */ +/* This work is part of OpenLDAP Software <http://www.openldap.org/>. + * + * Copyright 1998-2021 The OpenLDAP Foundation. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted only as authorized by the OpenLDAP + * Public License. + * + * A copy of this license is available in the file LICENSE in the + * top-level directory of the distribution or, alternatively, at + * <http://www.OpenLDAP.org/license.html>. + */ +/* Portions Copyright (c) 1995 Regents of the University of Michigan. + * All rights reserved. + * + * Redistribution and use in source and binary forms are permitted + * provided that this notice is preserved and that due credit is given + * to the University of Michigan at Ann Arbor. The name of the University + * may not be used to endorse or promote products derived from this + * software without specific prior written permission. This software + * is provided ``as is'' without express or implied warranty. + */ + +#include "portable.h" + +#include <ac/string.h> + +#include "slap.h" +#include "lutil.h" + +int +modify_add_values( + Entry *e, + Modification *mod, + int permissive, + const char **text, + char *textbuf, + size_t textlen ) +{ + int rc; + const char *op; + Attribute *a; + Modification pmod = *mod; + + switch ( mod->sm_op ) { + case LDAP_MOD_ADD: + op = "add"; + break; + case LDAP_MOD_REPLACE: + op = "replace"; + break; + default: + op = "?"; + assert( 0 ); + } + + /* FIXME: Catch old code that doesn't set sm_numvals. + */ + if ( !BER_BVISNULL( &mod->sm_values[mod->sm_numvals] )) { + unsigned i; + for ( i = 0; !BER_BVISNULL( &mod->sm_values[i] ); i++ ); + assert( mod->sm_numvals == i ); + } + + /* check if values to add exist in attribute */ + a = attr_find( e->e_attrs, mod->sm_desc ); + if ( a != NULL ) { + MatchingRule *mr; + struct berval *cvals; + int rc; + unsigned i, p, flags; + + mr = mod->sm_desc->ad_type->sat_equality; + if( mr == NULL || !mr->smr_match ) { + /* do not allow add of additional attribute + if no equality rule exists */ + *text = textbuf; + snprintf( textbuf, textlen, + "modify/%s: %s: no equality matching rule", + op, mod->sm_desc->ad_cname.bv_val ); + return LDAP_INAPPROPRIATE_MATCHING; + } + + if ( permissive ) { + i = mod->sm_numvals; + pmod.sm_values = (BerVarray)ch_malloc( + (i + 1) * sizeof( struct berval )); + if ( pmod.sm_nvalues != NULL ) { + pmod.sm_nvalues = (BerVarray)ch_malloc( + (i + 1) * sizeof( struct berval )); + } + } + + /* no normalization is done in this routine nor + * in the matching routines called by this routine. + * values are now normalized once on input to the + * server (whether from LDAP or from the underlying + * database). + */ + if ( a->a_desc == slap_schema.si_ad_objectClass ) { + /* Needed by ITS#5517 */ + flags = SLAP_MR_EQUALITY | SLAP_MR_VALUE_OF_ATTRIBUTE_SYNTAX; + + } else { + flags = SLAP_MR_EQUALITY | SLAP_MR_VALUE_OF_ASSERTION_SYNTAX; + } + if ( mod->sm_nvalues ) { + flags |= SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH | + SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH; + cvals = mod->sm_nvalues; + } else { + cvals = mod->sm_values; + } + for ( p = i = 0; i < mod->sm_numvals; i++ ) { + unsigned slot; + + rc = attr_valfind( a, flags, &cvals[i], &slot, NULL ); + if ( rc == LDAP_SUCCESS ) { + if ( !permissive ) { + /* value already exists */ + *text = textbuf; + snprintf( textbuf, textlen, + "modify/%s: %s: value #%u already exists", + op, mod->sm_desc->ad_cname.bv_val, i ); + return LDAP_TYPE_OR_VALUE_EXISTS; + } + } else if ( rc != LDAP_NO_SUCH_ATTRIBUTE ) { + return rc; + } + + if ( permissive && rc ) { + if ( pmod.sm_nvalues ) { + pmod.sm_nvalues[p] = mod->sm_nvalues[i]; + } + pmod.sm_values[p++] = mod->sm_values[i]; + } + } + + if ( permissive ) { + if ( p == 0 ) { + /* all new values match exist */ + ch_free( pmod.sm_values ); + if ( pmod.sm_nvalues ) ch_free( pmod.sm_nvalues ); + return LDAP_SUCCESS; + } + + BER_BVZERO( &pmod.sm_values[p] ); + if ( pmod.sm_nvalues ) { + BER_BVZERO( &pmod.sm_nvalues[p] ); + } + } + } + + /* no - add them */ + if ( mod->sm_desc->ad_type->sat_flags & SLAP_AT_ORDERED_VAL ) { + rc = ordered_value_add( e, mod->sm_desc, a, + pmod.sm_values, pmod.sm_nvalues ); + } else { + rc = attr_merge( e, mod->sm_desc, pmod.sm_values, pmod.sm_nvalues ); + } + + if ( a != NULL && permissive ) { + ch_free( pmod.sm_values ); + if ( pmod.sm_nvalues ) ch_free( pmod.sm_nvalues ); + } + + if ( rc != 0 ) { + /* this should return result of attr_merge */ + *text = textbuf; + snprintf( textbuf, textlen, + "modify/%s: %s: merge error (%d)", + op, mod->sm_desc->ad_cname.bv_val, rc ); + return LDAP_OTHER; + } + + return LDAP_SUCCESS; +} + +int +modify_delete_values( + Entry *e, + Modification *m, + int perm, + const char **text, + char *textbuf, size_t textlen ) +{ + return modify_delete_vindex( e, m, perm, text, textbuf, textlen, NULL ); +} + +int +modify_delete_vindex( + Entry *e, + Modification *mod, + int permissive, + const char **text, + char *textbuf, size_t textlen, + int *idx ) +{ + Attribute *a; + MatchingRule *mr = mod->sm_desc->ad_type->sat_equality; + struct berval *cvals; + int *id2 = NULL; + int rc = 0; + unsigned i, j, flags; + char dummy = '\0'; + + /* + * If permissive is set, then the non-existence of an + * attribute is not treated as an error. + */ + + /* delete the entire attribute */ + if ( mod->sm_values == NULL ) { + rc = attr_delete( &e->e_attrs, mod->sm_desc ); + + if( permissive ) { + rc = LDAP_SUCCESS; + } else if( rc != LDAP_SUCCESS ) { + *text = textbuf; + snprintf( textbuf, textlen, + "modify/delete: %s: no such attribute", + mod->sm_desc->ad_cname.bv_val ); + rc = LDAP_NO_SUCH_ATTRIBUTE; + } + return rc; + } + + /* FIXME: Catch old code that doesn't set sm_numvals. + */ + if ( !BER_BVISNULL( &mod->sm_values[mod->sm_numvals] )) { + for ( i = 0; !BER_BVISNULL( &mod->sm_values[i] ); i++ ); + assert( mod->sm_numvals == i ); + } + if ( !idx ) { + id2 = ch_malloc( mod->sm_numvals * sizeof( int )); + idx = id2; + } + + if( mr == NULL || !mr->smr_match ) { + /* disallow specific attributes from being deleted if + no equality rule */ + *text = textbuf; + snprintf( textbuf, textlen, + "modify/delete: %s: no equality matching rule", + mod->sm_desc->ad_cname.bv_val ); + rc = LDAP_INAPPROPRIATE_MATCHING; + goto return_result; + } + + /* delete specific values - find the attribute first */ + if ( (a = attr_find( e->e_attrs, mod->sm_desc )) == NULL ) { + if( permissive ) { + rc = LDAP_SUCCESS; + goto return_result; + } + *text = textbuf; + snprintf( textbuf, textlen, + "modify/delete: %s: no such attribute", + mod->sm_desc->ad_cname.bv_val ); + rc = LDAP_NO_SUCH_ATTRIBUTE; + goto return_result; + } + + if ( a->a_desc == slap_schema.si_ad_objectClass ) { + /* Needed by ITS#5517,ITS#5963 */ + flags = SLAP_MR_EQUALITY | SLAP_MR_VALUE_OF_ATTRIBUTE_SYNTAX; + + } else { + flags = SLAP_MR_EQUALITY | SLAP_MR_VALUE_OF_ASSERTION_SYNTAX; + } + if ( mod->sm_nvalues ) { + flags |= SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH + | SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH; + cvals = mod->sm_nvalues; + } else { + cvals = mod->sm_values; + } + + /* Locate values to delete */ + for ( i = 0; !BER_BVISNULL( &mod->sm_values[i] ); i++ ) { + unsigned sort; + rc = attr_valfind( a, flags, &cvals[i], &sort, NULL ); + if ( rc == LDAP_SUCCESS ) { + idx[i] = sort; + } else if ( rc == LDAP_NO_SUCH_ATTRIBUTE ) { + if ( permissive ) { + idx[i] = -1; + continue; + } + *text = textbuf; + snprintf( textbuf, textlen, + "modify/delete: %s: no such value", + mod->sm_desc->ad_cname.bv_val ); + goto return_result; + } else { + *text = textbuf; + snprintf( textbuf, textlen, + "modify/delete: %s: matching rule failed", + mod->sm_desc->ad_cname.bv_val ); + goto return_result; + } + } + + /* Delete the values */ + for ( i = 0; i < mod->sm_numvals; i++ ) { + /* Skip permissive values that weren't found */ + if ( idx[i] < 0 ) + continue; + /* Skip duplicate delete specs */ + if ( a->a_vals[idx[i]].bv_val == &dummy ) + continue; + /* delete value and mark it as gone */ + free( a->a_vals[idx[i]].bv_val ); + a->a_vals[idx[i]].bv_val = &dummy; + if( a->a_nvals != a->a_vals ) { + free( a->a_nvals[idx[i]].bv_val ); + a->a_nvals[idx[i]].bv_val = &dummy; + } + a->a_numvals--; + } + + /* compact array skipping dummies */ + for ( i = 0, j = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ ) { + /* skip dummies */ + if( a->a_vals[i].bv_val == &dummy ) { + assert( a->a_nvals[i].bv_val == &dummy ); + continue; + } + if ( j != i ) { + a->a_vals[ j ] = a->a_vals[ i ]; + if (a->a_nvals != a->a_vals) { + a->a_nvals[ j ] = a->a_nvals[ i ]; + } + } + j++; + } + + BER_BVZERO( &a->a_vals[j] ); + if (a->a_nvals != a->a_vals) { + BER_BVZERO( &a->a_nvals[j] ); + } + + /* if no values remain, delete the entire attribute */ + if ( !a->a_numvals ) { + if ( attr_delete( &e->e_attrs, mod->sm_desc ) ) { + /* Can never happen */ + *text = textbuf; + snprintf( textbuf, textlen, + "modify/delete: %s: no such attribute", + mod->sm_desc->ad_cname.bv_val ); + rc = LDAP_NO_SUCH_ATTRIBUTE; + } + } else if ( a->a_desc->ad_type->sat_flags & SLAP_AT_ORDERED_VAL ) { + /* For an ordered attribute, renumber the value indices */ + ordered_value_sort( a, 1 ); + } +return_result: + if ( id2 ) + ch_free( id2 ); + return rc; +} + +int +modify_replace_values( + Entry *e, + Modification *mod, + int permissive, + const char **text, + char *textbuf, size_t textlen ) +{ + (void) attr_delete( &e->e_attrs, mod->sm_desc ); + + if ( mod->sm_values ) { + return modify_add_values( e, mod, permissive, text, textbuf, textlen ); + } + + return LDAP_SUCCESS; +} + +int +modify_increment_values( + Entry *e, + Modification *mod, + int permissive, + const char **text, + char *textbuf, size_t textlen ) +{ + Attribute *a; + const char *syn_oid; + + a = attr_find( e->e_attrs, mod->sm_desc ); + if( a == NULL ) { + if ( permissive ) { + Modification modReplace = *mod; + + modReplace.sm_op = LDAP_MOD_REPLACE; + + return modify_add_values(e, &modReplace, permissive, text, textbuf, textlen); + } else { + *text = textbuf; + snprintf( textbuf, textlen, + "modify/increment: %s: no such attribute", + mod->sm_desc->ad_cname.bv_val ); + return LDAP_NO_SUCH_ATTRIBUTE; + } + } + + syn_oid = at_syntax( a->a_desc->ad_type ); + if ( syn_oid && !strcmp( syn_oid, SLAPD_INTEGER_SYNTAX )) { + int i; + char str[sizeof(long)*3 + 2]; /* overly long */ + long incr; + + if ( lutil_atol( &incr, mod->sm_values[0].bv_val ) != 0 ) { + *text = "modify/increment: invalid syntax of increment"; + return LDAP_INVALID_SYNTAX; + } + + /* treat zero and errors as a no-op */ + if( incr == 0 ) { + return LDAP_SUCCESS; + } + + for( i = 0; !BER_BVISNULL( &a->a_nvals[i] ); i++ ) { + char *tmp; + long value; + size_t strln; + if ( lutil_atol( &value, a->a_nvals[i].bv_val ) != 0 ) { + *text = "modify/increment: invalid syntax of original value"; + return LDAP_INVALID_SYNTAX; + } + strln = snprintf( str, sizeof(str), "%ld", value+incr ); + + tmp = SLAP_REALLOC( a->a_nvals[i].bv_val, strln+1 ); + if( tmp == NULL ) { + *text = "modify/increment: reallocation error"; + return LDAP_OTHER; + } + a->a_nvals[i].bv_val = tmp; + a->a_nvals[i].bv_len = strln; + + AC_MEMCPY( a->a_nvals[i].bv_val, str, strln+1 ); + } + + } else { + snprintf( textbuf, textlen, + "modify/increment: %s: increment not supported for value syntax %s", + mod->sm_desc->ad_cname.bv_val, + syn_oid ? syn_oid : "(NULL)" ); + return LDAP_CONSTRAINT_VIOLATION; + } + + return LDAP_SUCCESS; +} + +void +slap_mod_free( + Modification *mod, + int freeit ) +{ + if ( mod->sm_values != NULL ) ber_bvarray_free( mod->sm_values ); + mod->sm_values = NULL; + + if ( mod->sm_nvalues != NULL ) ber_bvarray_free( mod->sm_nvalues ); + mod->sm_nvalues = NULL; + + if( freeit ) free( mod ); +} + +void +slap_mods_free( + Modifications *ml, + int freevals ) +{ + Modifications *next; + + for ( ; ml != NULL; ml = next ) { + next = ml->sml_next; + + if ( freevals ) + slap_mod_free( &ml->sml_mod, 0 ); + free( ml ); + } +} + |