1 files changed, 157 insertions, 0 deletions
diff --git a/libraries/libldap/getattr.c b/libraries/libldap/getattr.c
new file mode 100644
index 0000000..07398df
--- /dev/null
+++ b/libraries/libldap/getattr.c
@@ -0,0 +1,157 @@
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1998-2022 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) 1990 Regents of the University of Michigan.
+ * All rights reserved.
+ */
+
+#include "portable.h"
+
+#include <stdio.h>
+#include <ac/stdlib.h>
+
+#include <ac/socket.h>
+#include <ac/string.h>
+#include <ac/time.h>
+
+#include "ldap-int.h"
+
+char *
+ldap_first_attribute( LDAP *ld, LDAPMessage *entry, BerElement **berout )
+{
+	int rc;
+	ber_tag_t tag;
+	ber_len_t len = 0;
+	char *attr;
+	BerElement *ber;
+
+	Debug0( LDAP_DEBUG_TRACE, "ldap_first_attribute\n" );
+
+	assert( ld != NULL );
+	assert( LDAP_VALID( ld ) );
+	assert( entry != NULL );
+	assert( berout != NULL );
+
+	*berout = NULL;
+
+	ber = ldap_alloc_ber_with_options( ld );
+	if( ber == NULL ) {
+		return NULL;
+	}
+
+	*ber = *entry->lm_ber;
+
+	/* 
+	 * Skip past the sequence, dn, sequence of sequence leaving
+	 * us at the first attribute.
+	 */
+
+	tag = ber_scanf( ber, "{xl{" /*}}*/, &len );
+	if( tag == LBER_ERROR ) {
+		ld->ld_errno = LDAP_DECODING_ERROR;
+		ber_free( ber, 0 );
+		return NULL;
+	}
+
+	/* set the length to avoid overrun */
+	rc = ber_set_option( ber, LBER_OPT_REMAINING_BYTES, &len );
+	if( rc != LBER_OPT_SUCCESS ) {
+		ld->ld_errno = LDAP_LOCAL_ERROR;
+		ber_free( ber, 0 );
+		return NULL;
+	}
+
+	if ( ber_pvt_ber_remaining( ber ) == 0 ) {
+		assert( len == 0 );
+		ber_free( ber, 0 );
+		return NULL;
+	}
+	assert( len != 0 );
+
+	/* snatch the first attribute */
+	tag = ber_scanf( ber, "{ax}", &attr );
+	if( tag == LBER_ERROR ) {
+		ld->ld_errno = LDAP_DECODING_ERROR;
+		ber_free( ber, 0 );
+		return NULL;
+	}
+
+	*berout = ber;
+	return attr;
+}
+
+/* ARGSUSED */
+char *
+ldap_next_attribute( LDAP *ld, LDAPMessage *entry, BerElement *ber )
+{
+	ber_tag_t tag;
+	char *attr;
+
+	Debug0( LDAP_DEBUG_TRACE, "ldap_next_attribute\n" );
+
+	assert( ld != NULL );
+	assert( LDAP_VALID( ld ) );
+	assert( entry != NULL );
+	assert( ber != NULL );
+
+	if ( ber_pvt_ber_remaining( ber ) == 0 ) {
+		return NULL;
+	}
+
+	/* skip sequence, snarf attribute type, skip values */
+	tag = ber_scanf( ber, "{ax}", &attr ); 
+	if( tag == LBER_ERROR ) {
+		ld->ld_errno = LDAP_DECODING_ERROR;
+		return NULL;
+	}
+
+	return attr;
+}
+
+/* Fetch attribute type and optionally fetch values. The type
+ * and values are referenced in-place from the BerElement, they are
+ * not dup'd into malloc'd memory.
+ */
+/* ARGSUSED */
+int
+ldap_get_attribute_ber( LDAP *ld, LDAPMessage *entry, BerElement *ber,
+	BerValue *attr, BerVarray *vals )
+{
+	ber_tag_t tag;
+	int rc = LDAP_SUCCESS;
+
+	Debug0( LDAP_DEBUG_TRACE, "ldap_get_attribute_ber\n" );
+
+	assert( ld != NULL );
+	assert( LDAP_VALID( ld ) );
+	assert( entry != NULL );
+	assert( ber != NULL );
+	assert( attr != NULL );
+
+	attr->bv_val = NULL;
+	attr->bv_len = 0;
+
+	if ( ber_pvt_ber_remaining( ber ) ) {
+		ber_len_t siz = sizeof( BerValue );
+
+		/* skip sequence, snarf attribute type */
+		tag = ber_scanf( ber, vals ? "{mM}" : "{mx}", attr, vals,
+			&siz, (ber_len_t)0 );
+		if( tag == LBER_ERROR ) {
+			rc = ld->ld_errno = LDAP_DECODING_ERROR;
+		}
+	}
+
+	return rc;
+}