As per spec (BT spec 4.1 Vol[3], Part F, chapter 3.4.5.4) message which
should be taken to generate signature is opcode, handle and parameters
---
android/gatt.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/android/gatt.c b/android/gatt.c
index d93bdcb..b18ca4a 100644
--- a/android/gatt.c
+++ b/android/gatt.c
@@ -5059,8 +5059,9 @@ static void write_signed_cmd_request(const uint8_t *cmd, uint16_t cmd_len,
}
/* Generate signature and verify it */
- if (!bt_crypto_sign_att(crypto, csrk, value, vlen, sign_cnt,
- t)) {
+ if (!bt_crypto_sign_att(crypto, csrk, cmd,
+ cmd_len - ATT_SIGNATURE_LEN,
+ sign_cnt, t)) {
error("gatt: Error when generating att signature");
return;
}
--
1.8.4
--
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