---
android/gatt.c | 36 ++++++++++++++++++++++++++++++++++++
1 file changed, 36 insertions(+)
diff --git a/android/gatt.c b/android/gatt.c
index 9e65fb5..33e1db9 100644
--- a/android/gatt.c
+++ b/android/gatt.c
@@ -2610,6 +2610,38 @@ static void write_char_cb(guint8 status, const guint8 *pdu, guint16 len,
free(data);
}
+static bool signed_write_cmd(struct gatt_device *dev, uint16_t handle,
+ const uint8_t *value, uint16_t vlen)
+{
+ uint8_t s[ATT_SIGNATURE_LEN];
+ uint8_t csrk[16];
+ uint32_t sign_cnt;
+
+ memset(csrk, 0, 16);
+
+ if (!bt_get_csrk(&dev->bdaddr, LOCAL_CSRK, csrk, &sign_cnt)) {
+ error("gatt: Could not get csrk key");
+ return false;
+ }
+
+ memset(s, 0, ATT_SIGNATURE_LEN);
+
+ if (!bt_crypto_sign_att(crypto, csrk, value, vlen, sign_cnt, s)) {
+ error("gatt: Could not sign att data");
+ return false;
+ }
+
+ if (!gatt_signed_write_cmd(dev->attrib, handle, value, vlen, s, NULL,
+ NULL)) {
+ error("gatt: Could write signed cmd");
+ return false;
+ }
+
+ bt_update_sign_counter(&dev->bdaddr, LOCAL_CSRK);
+
+ return true;
+}
+
static void handle_client_write_characteristic(const void *buf, uint16_t len)
{
const struct hal_cmd_gatt_client_write_characteristic *cmd = buf;
@@ -2674,6 +2706,10 @@ static void handle_client_write_characteristic(const void *buf, uint16_t len)
cmd->value, cmd->len,
write_char_cb, cb_data);
break;
+ case GATT_WRITE_TYPE_SIGNED:
+ res = signed_write_cmd(conn->device, ch->ch.value_handle,
+ cmd->value, cmd->len);
+ break;
default:
error("gatt: Write type %d unsupported", cmd->write_type);
status = HAL_STATUS_UNSUPPORTED;
--
1.8.4
--
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