1 files changed, 289 insertions, 0 deletions
diff --git a/libraries/libldap/deref.c b/libraries/libldap/deref.c
new file mode 100644
index 0000000..f187a9f
--- /dev/null
+++ b/libraries/libldap/deref.c
@@ -0,0 +1,289 @@
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1998-2022 The OpenLDAP Foundation.
+ * Portions Copyright 2008 Pierangelo Masarati.
+ * 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>.
+ */
+/* ACKNOWLEDGEMENTS:
+ * This work was initially developed by Pierangelo Masarati
+ * for inclusion in OpenLDAP Software.
+ */
+
+#include "portable.h"
+
+#include <stdio.h>
+#include <ac/stdlib.h>
+#include <ac/string.h>
+#include <ac/time.h>
+
+#include "ldap-int.h"
+
+int
+ldap_create_deref_control_value(
+	LDAP		*ld,
+	LDAPDerefSpec	*ds,
+	struct berval	*value )
+{
+	BerElement	*ber = NULL;
+	ber_tag_t	tag;
+	int		i;
+
+	if ( ld == NULL || value == NULL || ds == NULL )
+	{
+		if ( ld )
+			ld->ld_errno = LDAP_PARAM_ERROR;
+		return LDAP_PARAM_ERROR;
+	}
+
+	assert( LDAP_VALID( ld ) );
+
+	value->bv_val = NULL;
+	value->bv_len = 0;
+	ld->ld_errno = LDAP_SUCCESS;
+
+	ber = ldap_alloc_ber_with_options( ld );
+	if ( ber == NULL ) {
+		ld->ld_errno = LDAP_NO_MEMORY;
+		return ld->ld_errno;
+	}
+
+	tag = ber_printf( ber, "{" /*}*/ );
+	if ( tag == LBER_ERROR ) {
+		ld->ld_errno = LDAP_ENCODING_ERROR;
+		goto done;
+	}
+
+	for ( i = 0; ds[i].derefAttr != NULL; i++ ) {
+		int j;
+
+		tag = ber_printf( ber, "{s{" /*}}*/ , ds[i].derefAttr );
+		if ( tag == LBER_ERROR ) {
+			ld->ld_errno = LDAP_ENCODING_ERROR;
+			goto done;
+		}
+
+		for ( j = 0; ds[i].attributes[j] != NULL; j++ ) {
+			tag = ber_printf( ber, "s", ds[i].attributes[ j ] );
+			if ( tag == LBER_ERROR ) {
+				ld->ld_errno = LDAP_ENCODING_ERROR;
+				goto done;
+			}
+		}
+
+		tag = ber_printf( ber, /*{{*/ "}N}" );
+		if ( tag == LBER_ERROR ) {
+			ld->ld_errno = LDAP_ENCODING_ERROR;
+			goto done;
+		}
+	}
+
+	tag = ber_printf( ber, /*{*/ "}" );
+	if ( tag == LBER_ERROR ) {
+		ld->ld_errno = LDAP_ENCODING_ERROR;
+		goto done;
+	}
+
+	if ( ber_flatten2( ber, value, 1 ) == -1 ) {
+		ld->ld_errno = LDAP_NO_MEMORY;
+	}
+
+done:;
+	if ( ber != NULL ) {
+		ber_free( ber, 1 );
+	}
+
+	return ld->ld_errno;
+}
+
+int
+ldap_create_deref_control(
+	LDAP		*ld,
+	LDAPDerefSpec	*ds,
+	int		iscritical,
+	LDAPControl	**ctrlp )
+{
+	struct berval	value;
+
+	if ( ctrlp == NULL ) {
+		ld->ld_errno = LDAP_PARAM_ERROR;
+		return ld->ld_errno;
+	}
+
+	ld->ld_errno = ldap_create_deref_control_value( ld, ds, &value );
+	if ( ld->ld_errno == LDAP_SUCCESS ) {
+		ld->ld_errno = ldap_control_create( LDAP_CONTROL_X_DEREF,
+			iscritical, &value, 0, ctrlp );
+		if ( ld->ld_errno != LDAP_SUCCESS ) {
+			LDAP_FREE( value.bv_val );
+		}
+	}
+
+	return ld->ld_errno;
+}
+
+void
+ldap_derefresponse_free( LDAPDerefRes *dr )
+{
+	for ( ; dr; ) {
+		LDAPDerefRes *drnext = dr->next;
+		LDAPDerefVal *dv;
+
+		LDAP_FREE( dr->derefAttr );
+		LDAP_FREE( dr->derefVal.bv_val );
+
+		for ( dv = dr->attrVals; dv; ) {
+			LDAPDerefVal *dvnext = dv->next;
+			LDAP_FREE( dv->type );
+			ber_bvarray_free( dv->vals );
+			LDAP_FREE( dv );
+			dv = dvnext;
+		}
+
+		LDAP_FREE( dr );
+
+		dr = drnext;
+	}
+}
+
+int
+ldap_parse_derefresponse_control(
+	LDAP		*ld,
+	LDAPControl	*ctrl,
+	LDAPDerefRes	**drp2 )
+{
+	BerElementBuffer berbuf;
+	BerElement *ber = (BerElement *)&berbuf;
+	ber_tag_t tag;
+	ber_len_t len;
+	char *last;
+	LDAPDerefRes *drhead = NULL, **drp;
+
+	if ( ld == NULL || ctrl == NULL || drp2 == NULL ) {
+		if ( ld )
+			ld->ld_errno = LDAP_PARAM_ERROR;
+		return LDAP_PARAM_ERROR;
+	}
+
+	/* Set up a BerElement from the berval returned in the control. */
+	ber_init2( ber, &ctrl->ldctl_value, 0 );
+
+	/* Extract the count and cookie from the control. */
+	drp = &drhead;
+	for ( tag = ber_first_element( ber, &len, &last );
+		tag != LBER_DEFAULT;
+		tag = ber_next_element( ber, &len, last ) )
+	{
+		LDAPDerefRes *dr;
+		LDAPDerefVal **dvp;
+		char *last2;
+
+		dr = LDAP_CALLOC( 1, sizeof(LDAPDerefRes) );
+		if ( dr == NULL ) {
+			ldap_derefresponse_free( drhead );
+			*drp2 = NULL;
+			ld->ld_errno = LDAP_NO_MEMORY;
+			return ld->ld_errno;
+		}
+		dvp = &dr->attrVals;
+
+		tag = ber_scanf( ber, "{ao", &dr->derefAttr, &dr->derefVal );
+		if ( tag == LBER_ERROR ) {
+			goto done;
+		}
+
+		tag = ber_peek_tag( ber, &len );
+		if ( tag == (LBER_CONSTRUCTED|LBER_CLASS_CONTEXT) ) {
+			for ( tag = ber_first_element( ber, &len, &last2 );
+				tag != LBER_DEFAULT;
+				tag = ber_next_element( ber, &len, last2 ) )
+			{
+				LDAPDerefVal *dv;
+
+				dv = LDAP_CALLOC( 1, sizeof(LDAPDerefVal) );
+				if ( dv == NULL ) {
+					ldap_derefresponse_free( drhead );
+					LDAP_FREE( dr );
+					*drp2 = NULL;
+					ld->ld_errno = LDAP_NO_MEMORY;
+					return ld->ld_errno;
+				}
+
+				tag = ber_scanf( ber, "{a[W]}", &dv->type, &dv->vals );
+				if ( tag == LBER_ERROR ) {
+					goto done;
+				}
+
+				*dvp = dv;
+				dvp = &dv->next;
+			}
+		}
+
+		tag = ber_scanf( ber, "}" );
+		if ( tag == LBER_ERROR ) {
+			goto done;
+		}
+
+		*drp = dr;
+		drp = &dr->next;
+	}
+
+	tag = 0;
+
+done:;
+	if ( tag == LBER_ERROR ) {
+		if ( drhead != NULL ) {
+			ldap_derefresponse_free( drhead );
+		}
+
+		*drp2 = NULL;
+		ld->ld_errno = LDAP_DECODING_ERROR;
+
+	} else {
+		*drp2 = drhead;
+		ld->ld_errno = LDAP_SUCCESS;
+	}
+
+	return ld->ld_errno;
+}
+
+int
+ldap_parse_deref_control(
+	LDAP		*ld,
+	LDAPControl	**ctrls,
+	LDAPDerefRes	**drp )
+{
+	LDAPControl *c;
+
+	if ( drp == NULL ) {
+		ld->ld_errno = LDAP_PARAM_ERROR;
+		return ld->ld_errno;
+	}
+
+	*drp = NULL;
+
+	if ( ctrls == NULL ) {
+		ld->ld_errno =  LDAP_CONTROL_NOT_FOUND;
+		return ld->ld_errno;
+	}
+
+	c = ldap_control_find( LDAP_CONTROL_X_DEREF, ctrls, NULL );
+	if ( c == NULL ) {
+		/* No deref control was found. */
+		ld->ld_errno = LDAP_CONTROL_NOT_FOUND;
+		return ld->ld_errno;
+	}
+
+	ld->ld_errno = ldap_parse_derefresponse_control( ld, c, drp );
+
+	return ld->ld_errno;
+}
+