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From:   Luiz Augusto von Dentz <luiz.dentz@gmail.com>
To:     linux-bluetooth@vger.kernel.org
Subject: [PATCH BlueZ 4/6] device: Add btd_device_get_ltk
Date:   Mon,  2 Oct 2023 16:13:08 -0700
Message-ID: <20231002231311.3104749-4-luiz.dentz@gmail.com>
In-Reply-To: <20231002231311.3104749-1-luiz.dentz@gmail.com>
References: <20231002231311.3104749-1-luiz.dentz@gmail.com>
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From: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>

This adds btd_device_get_ltk function which can be used by plugins to
access the LTK key.
---
 src/device.c | 17 +++++++++++++++++
 src/device.h |  2 ++
 2 files changed, 19 insertions(+)

diff --git a/src/device.c b/src/device.c
index 35ce1df0fe74..a734fff0dc73 100644
--- a/src/device.c
+++ b/src/device.c
@@ -1938,6 +1938,23 @@ void device_set_ltk(struct btd_device *device, const uint8_t val[16],
 	queue_foreach(device->sirks, add_set, device);
 }
 
+bool btd_device_get_ltk(struct btd_device *device, uint8_t key[16],
+				bool *central, uint8_t *enc_size)
+{
+	if (!device || !device->ltk || !key)
+		return false;
+
+	memcpy(key, device->ltk->key, sizeof(device->ltk->key));
+
+	if (central)
+		*central = device->ltk->central;
+
+	if (enc_size)
+		*enc_size = device->ltk->enc_size;
+
+	return true;
+}
+
 static bool match_sirk(const void *data, const void *match_data)
 {
 	const struct sirk_info *sirk = data;
diff --git a/src/device.h b/src/device.h
index 0a9e51533ca5..8bb38669d457 100644
--- a/src/device.h
+++ b/src/device.h
@@ -132,6 +132,8 @@ void device_request_disconnect(struct btd_device *device, DBusMessage *msg);
 bool device_is_disconnecting(struct btd_device *device);
 void device_set_ltk(struct btd_device *device, const uint8_t val[16],
 				bool central, uint8_t enc_size);
+bool btd_device_get_ltk(struct btd_device *device, uint8_t val[16],
+				bool *central, uint8_t *enc_size);
 bool btd_device_add_set(struct btd_device *device, bool encrypted,
 				uint8_t sirk[16], uint8_t size, uint8_t rank);
 void device_store_svc_chng_ccc(struct btd_device *device, uint8_t bdaddr_type,
-- 
2.41.0