Adding upstream version 2.4.57+dfsg.upstream/2.4.57+dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

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 );
+	}
+}
+