Define an interface for SASL mechanisms and provide a static factory

1 files changed, 88 insertions, 0 deletions

diff --git a/src/libpttls/sasl/sasl_mechanism.c b/src/libpttls/sasl/sasl_mechanism.c
new file mode 100644
index 000000000..4e0f876be
--- /dev/null
+++ b/src/libpttls/sasl/sasl_mechanism.c
@@ -0,0 +1,88 @@
+/*
+ * Copyright (C) 2013 Martin Willi
+ * Copyright (C) 2013 revosec AG
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ */
+
+#include "sasl_mechanism.h"
+
+/**
+ * Available SASL mechanisms.
+ */
+static struct {
+	char *name;
+	bool server;
+	sasl_mechanism_constructor_t create;
+} mechs[] = {
+};
+
+/**
+ * See header.
+ */
+sasl_mechanism_t *sasl_mechanism_create(char *name, identification_t *client)
+{
+	int i;
+
+	for (i = 0; i < countof(mechs); i++)
+	{
+		if (streq(mechs[i].name, name) && mechs[i].server == (client == NULL))
+		{
+			return mechs[i].create(name, client);
+		}
+	}
+	return NULL;
+}
+
+/**
+ * SASL mechanism enumerator
+ */
+typedef struct {
+	/** implements enumerator_t */
+	enumerator_t public;
+	/** looking for client or server? */
+	bool server;
+	/** position in mechs[] */
+	int i;
+} mech_enumerator_t;
+
+METHOD(enumerator_t, mech_enumerate, bool,
+	mech_enumerator_t *this, char **name)
+{
+	while (this->i < countof(mechs))
+	{
+		if (mechs[this->i].server == this->server)
+		{
+			*name = mechs[this->i].name;
+			this->i++;
+			return TRUE;
+		}
+		this->i++;
+	}
+	return FALSE;
+}
+
+/**
+ * See header.
+ */
+enumerator_t* sasl_mechanism_create_enumerator(bool server)
+{
+	mech_enumerator_t *enumerator;
+
+	INIT(enumerator,
+		.public = {
+			.enumerate = (void*)_mech_enumerate,
+			.destroy = (void*)free,
+		},
+		.server = server,
+	);
+	return &enumerator->public;
+}