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From:   Luiz Augusto von Dentz <luiz.dentz@gmail.com>
To:     linux-bluetooth@vger.kernel.org
Subject: [PATCH v3 2/2] input: Add LEAutoSecurity setting to input.conf
Date:   Thu, 12 Mar 2020 15:38:39 -0700
Message-Id: <20200312223839.6236-2-luiz.dentz@gmail.com>
In-Reply-To: <20200312223839.6236-1-luiz.dentz@gmail.com>
References: <20200312223839.6236-1-luiz.dentz@gmail.com>
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From: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>

LEAutoSecurity can be used to enable/disable automatic upgrades of
security for LE devices, by default it is enabled so existing devices
that did not require security and were not bonded will automatically
upgrade the security.

Note: Platforms disabling this setting would require users to manually
bond the device which may require changes to the user interface to
always force bonding for input devices as APIs such as Device.Connect
will no longer work which maybe perceived as a regression.
---
 profiles/input/device.h   |  1 +
 profiles/input/hog.c      | 13 +++++++++++--
 profiles/input/input.conf |  5 +++++
 profiles/input/manager.c  | 11 ++++++++++-
 4 files changed, 27 insertions(+), 3 deletions(-)

diff --git a/profiles/input/device.h b/profiles/input/device.h
index 3044db673..5a077f92a 100644
--- a/profiles/input/device.h
+++ b/profiles/input/device.h
@@ -30,6 +30,7 @@ struct input_conn;
 void input_set_idle_timeout(int timeout);
 void input_enable_userspace_hid(bool state);
 void input_set_classic_bonded_only(bool state);
+void input_set_auto_sec(bool state);
 
 int input_device_register(struct btd_service *service);
 void input_device_unregister(struct btd_service *service);
diff --git a/profiles/input/hog.c b/profiles/input/hog.c
index f0226ebbd..327a1d1c3 100644
--- a/profiles/input/hog.c
+++ b/profiles/input/hog.c
@@ -53,6 +53,7 @@
 #include "src/shared/gatt-client.h"
 #include "src/plugin.h"
 
+#include "device.h"
 #include "suspend.h"
 #include "attrib/att.h"
 #include "attrib/gattrib.h"
@@ -67,8 +68,14 @@ struct hog_device {
 };
 
 static gboolean suspend_supported = FALSE;
+static bool auto_sec = true;
 static struct queue *devices = NULL;
 
+void input_set_auto_sec(bool state)
+{
+	auto_sec = state;
+}
+
 static void hog_device_accept(struct hog_device *dev, struct gatt_db *db)
 {
 	char name[248];
@@ -192,11 +199,13 @@ static int hog_accept(struct btd_service *service)
 	if (!device_is_bonded(device, btd_device_get_bdaddr_type(device))) {
 		struct bt_gatt_client *client;
 
+		if (!auto_sec)
+			return -ECONNREFUSED;
+
 		client = btd_device_get_gatt_client(device);
 		if (!bt_gatt_client_set_security(client,
-						BT_ATT_SECURITY_MEDIUM)) {
+						BT_ATT_SECURITY_MEDIUM))
 			return -ECONNREFUSED;
-		}
 	}
 
 	/* TODO: Replace GAttrib with bt_gatt_client */
diff --git a/profiles/input/input.conf b/profiles/input/input.conf
index 166aff4a4..4c70bc561 100644
--- a/profiles/input/input.conf
+++ b/profiles/input/input.conf
@@ -19,3 +19,8 @@
 # pairing/encryption.
 # Defaults to false to maximize device compatibility.
 #ClassicBondedOnly=true
+
+# LE upgrade security
+# Enables upgrades of security automatically if required.
+# Defaults to true to maximize device compatibility.
+#LEAutoSecurity=true
diff --git a/profiles/input/manager.c b/profiles/input/manager.c
index 5cd27b839..bf4acb4ed 100644
--- a/profiles/input/manager.c
+++ b/profiles/input/manager.c
@@ -96,7 +96,7 @@ static int input_init(void)
 	config = load_config_file(CONFIGDIR "/input.conf");
 	if (config) {
 		int idle_timeout;
-		gboolean uhid_enabled, classic_bonded_only;
+		gboolean uhid_enabled, classic_bonded_only, auto_sec;
 
 		idle_timeout = g_key_file_get_integer(config, "General",
 							"IdleTimeout", &err);
@@ -125,6 +125,15 @@ static int input_init(void)
 		} else
 			g_clear_error(&err);
 
+		auto_sec = g_key_file_get_boolean(config, "General",
+						"LEAutoSecurity", &err);
+		if (!err) {
+			DBG("input.conf: LEAutoSecurity=%s",
+					auto_sec ? "true" : "false");
+			input_set_auto_sec(auto_sec);
+		} else
+			g_clear_error(&err);
+
 	}
 
 	btd_profile_register(&input_profile);
-- 
2.21.1