GATT will take CSRK key and sign counter each time it needs it to sign
att package or to verify att package
---
android/bluetooth.c | 30 ++++++++++++++++++++++++++++++
android/bluetooth.h | 3 +++
2 files changed, 33 insertions(+)
diff --git a/android/bluetooth.c b/android/bluetooth.c
index 379d8ea..6a10e83 100644
--- a/android/bluetooth.c
+++ b/android/bluetooth.c
@@ -116,6 +116,14 @@ struct device {
bool found; /* if device is found in current discovery session */
unsigned int confirm_id; /* mgtm command id if command pending */
+
+ bool valid_remote_csrk;
+ uint8_t remote_csrk[16];
+ uint32_t remote_sign_cnt;
+
+ bool valid_local_csrk;
+ uint8_t local_csrk[16];
+ uint32_t local_sign_cnt;
};
struct browse_req {
@@ -3199,6 +3207,28 @@ bool bt_read_device_rssi(const bdaddr_t *addr, bt_read_device_rssi_done cb,
return true;
}
+bool bt_get_csrk(const bdaddr_t *addr, bool local, uint8_t key[16],
+ uint32_t *sign_cnt)
+{
+ struct device *dev;
+
+ dev = find_device(addr);
+ if (!dev)
+ return false;
+
+ if (local && dev->valid_local_csrk) {
+ memcpy(key, dev->local_csrk, 16);
+ *sign_cnt = dev->local_sign_cnt;
+ } else if (!local && dev->valid_remote_csrk) {
+ memcpy(key, dev->remote_csrk, 16);
+ *sign_cnt = dev->remote_sign_cnt;
+ } else {
+ return false;
+ }
+
+ return true;
+}
+
static uint8_t set_adapter_scan_mode(const void *buf, uint16_t len)
{
const uint8_t *mode = buf;
diff --git a/android/bluetooth.h b/android/bluetooth.h
index 6a3e766..8462770 100644
--- a/android/bluetooth.h
+++ b/android/bluetooth.h
@@ -55,3 +55,6 @@ typedef void (*bt_read_device_rssi_done)(uint8_t status, const bdaddr_t *addr,
int8_t rssi, void *user_data);
bool bt_read_device_rssi(const bdaddr_t *addr, bt_read_device_rssi_done cb,
void *user_data);
+
+bool bt_get_csrk(const bdaddr_t *addr, bool local, uint8_t key[16],
+ uint32_t *sign_cnt);
--
1.8.4
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