ADDED   src/XMPPEXTERNALAuth.h
Index: src/XMPPEXTERNALAuth.h
==================================================================
--- /dev/null
+++ src/XMPPEXTERNALAuth.h
@@ -0,0 +1,44 @@
+/*
+ * Copyright (c) 2012, Florian Zeitz <florob@babelmonkeys.de>
+ *
+ * https://webkeks.org/hg/objxmpp/
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice is present in all copies.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#import <ObjFW/ObjFW.h>
+#import "XMPPAuthenticator.h"
+
+/**
+ * \brief A class to authenticate using SASL EXTERNAL
+ */
+@interface XMPPEXTERNALAuth: XMPPAuthenticator
+/**
+ * Creates a new autoreleased XMPPEXTERNALAuth.
+ *
+ * \return A new autoreleased XMPPEXTERNALAuth
+ */
++ EXTERNALAuth;
+
+/**
+ * Creates a new autoreleased XMPPEXTERNALAuth with an authzid.
+ *
+ * \param authzid The authzid to get authorization for
+ * \return A new autoreleased XMPPEXTERNALAuth
+ */
++ EXTERNALAuthWithAuthzid: (OFString*)authzid;
+@end

ADDED   src/XMPPEXTERNALAuth.m
Index: src/XMPPEXTERNALAuth.m
==================================================================
--- /dev/null
+++ src/XMPPEXTERNALAuth.m
@@ -0,0 +1,53 @@
+/*
+ * Copyright (c) 2012, Florian Zeitz <florob@babelmonkeys.de>
+ *
+ * https://webkeks.org/hg/objxmpp/
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice is present in all copies.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#import "XMPPEXTERNALAuth.h"
+
+@implementation XMPPEXTERNALAuth: XMPPAuthenticator
++ EXTERNALAuth
+{
+	return [[[self alloc] initWithAuthcid: nil
+				     password: nil] autorelease];
+}
+
++ EXTERNALAuthWithAuthzid: (OFString*)authzid_
+{
+	return [[[self alloc] initWithAuthzid: authzid_
+				      authcid: nil
+				     password: nil] autorelease];
+}
+
+- (OFDataArray*)initialMessage
+{
+	OFDataArray *message = [OFDataArray dataArrayWithItemSize: 1];
+
+	/* authzid */
+	if (authzid)
+		[message addItem: authzid];
+
+	return message;
+}
+@end