If CSRK is valid between sessions we should remember sign counter.
Therefor store it.
---
android/bluetooth.c | 41 +++++++++++++++++++++++++++++++++++++++--
1 file changed, 39 insertions(+), 2 deletions(-)
diff --git a/android/bluetooth.c b/android/bluetooth.c
index f8a7b3d..445aceb 100644
--- a/android/bluetooth.c
+++ b/android/bluetooth.c
@@ -1878,8 +1878,6 @@ static void new_csrk_callback(uint16_t index, uint16_t length,
if (ev->store_hint)
store_csrk(dev);
-
- /*TODO: Store sign counter */
}
static void register_mgmt_handlers(void)
@@ -2353,6 +2351,9 @@ static struct device *create_device_from_info(GKeyFile *key_file,
sscanf(str + (i * 2), "%02hhX", &dev->local_csrk[i]);
g_free(str);
+
+ dev->local_sign_cnt = g_key_file_get_integer(key_file, peer,
+ "LocalCSRKSignCounter", NULL);
}
str = g_key_file_get_string(key_file, peer, "RemoteCSRK", NULL);
@@ -2364,6 +2365,9 @@ static struct device *create_device_from_info(GKeyFile *key_file,
sscanf(str + (i * 2), "%02hhX", &dev->remote_csrk[i]);
g_free(str);
+
+ dev->remote_sign_cnt = g_key_file_get_integer(key_file, peer,
+ "RemoteCSRKSignCounter", NULL);
}
str = g_key_file_get_string(key_file, peer, "Name", NULL);
@@ -3334,6 +3338,37 @@ bool bt_get_csrk(const bdaddr_t *addr, enum bt_csrk_type type, uint8_t key[16],
return true;
}
+static void store_sign_counter(struct device *dev, enum bt_csrk_type type)
+{
+ const char *sign_cnt_s;
+ uint32_t sign_cnt;
+ GKeyFile *key_file;
+ bool local = (type == LOCAL_CSRK);
+
+ gsize length = 0;
+ char addr[18];
+ char *data;
+
+ key_file = g_key_file_new();
+ if (!g_key_file_load_from_file(key_file, DEVICES_FILE, 0, NULL)) {
+ g_key_file_free(key_file);
+ return;
+ }
+
+ ba2str(&dev->bdaddr, addr);
+
+ sign_cnt_s = local ? "LocalCSRKSignCounter" : "RemoteCSRKSignCounter";
+ sign_cnt = local ? dev->local_sign_cnt : dev->remote_sign_cnt;
+
+ g_key_file_set_integer(key_file, addr, sign_cnt_s, sign_cnt);
+
+ data = g_key_file_to_data(key_file, &length, NULL);
+ g_file_set_contents(DEVICES_FILE, data, length, NULL);
+ g_free(data);
+
+ g_key_file_free(key_file);
+}
+
void bt_update_sign_counter(const bdaddr_t *addr, enum bt_csrk_type type)
{
struct device *dev;
@@ -3346,6 +3381,8 @@ void bt_update_sign_counter(const bdaddr_t *addr, enum bt_csrk_type type)
dev->local_sign_cnt++;
else
dev->remote_sign_cnt++;
+
+ store_sign_counter(dev, type);
}
static uint8_t set_adapter_scan_mode(const void *buf, uint16_t len)
--
1.8.4
--
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