How To Add AES128 bit encription in my Application

RE: How To Add AES128 bit encription in my Application

Amanda Hsieh — Tue, 12 May 2020 07:24:04 GMT

Hi Murugan,

Decimal 4352 is 0x1100. The following defines and reasoning for this error in peer_manager_types.h:

#define PM_CONN_SEC_ERROR_BASE 0x1000  /**< @brief The base for Peer Manager defined errors. See @ref PM_SEC_ERRORS and @ref pm_sec_error_code_t. */
#define PM_CONN_SEC_ERROR_DISCONNECT         (PM_CONN_SEC_ERROR_BASE + 0x100) /**< @brief Pairing or encryption did not finish before the link disconnected for an unrelated reason. */

So it looks like the device disconnects before the pairing or encryption procedure completed.

Can you provide the full log output from the failing device? If you could set NRF_LOG_DEFAULT_LEVEL to 4 in your sdk_config.h file, that should provide more details.

What device are you testing against?

Can you provide a sniffer trace between the two devices when trying to perform bonding? You can use nRFSniffer v2 for that.

This thread might help.

-Amanda H.

RE: How To Add AES128 bit encription in my Application

Murugan — Tue, 12 May 2020 04:15:08 GMT

Thanks for reply. I add AES128 encryption in my application (BLE_UART) both peripheral and central code. Peripheral side working good. But central side facing connection error.

0> <info> app: BLE UART central example started.
0> <info> app: C42CA8A1FD6A
0> <info> app: ATT MTU exchange completed.
0> <info> app: Ble NUS max data length set to 0xF4(244)
0> <info> app: Discovery complete.
0> <info> app: Connected to device with Nordic UART Service.
0> <info> peer_manager_handler: Connection security failed: role: Central, conn_handle: 0x0, procedure: Bonding, error: 4352
0> <warning> peer_manager_handler: Disconnecting conn_handle 0.
0> <info> app: Disconnected.
0> <info> app: Erase bonds
0> <info> peer_manager_handler: All peers deleted.
0> <error> app: Fatal error

My SDK 15.2

Example : ble_app_uart_c and ble_app_uart

please support solve this issue.

RE: How To Add AES128 bit encription in my Application

Amanda Hsieh — Mon, 20 Apr 2020 08:03:04 GMT

Hi,

[quote user=""]I want support for AES18bit Encription. Need basic tutorials and how to add my existing code.[/quote]

Please see the AES Example. If you want to encrypt advertisement data you need to do that in your application. Something like this might do the trick: https://devzone.nordicsemi.com/f/nordic-q-a/13429/aes-encryption-with-sd

-Amanda H.

RE: How To Add AES128 bit encription in my Application

Murugan — Wed, 15 Apr 2020 03:48:49 GMT

This encryption is also affect advertising data ?

RE: How To Add AES128 bit encription in my Application

Murugan — Wed, 15 Apr 2020 03:45:38 GMT

Thanks for reply. I will check and update you.

RE: How To Add AES128 bit encription in my Application

Jimmy Wong — Wed, 15 Apr 2020 03:28:11 GMT

Hi,

you can use the crypto library.

https://jimmywongiot.com/2019/07/30/how-to-use-the-ecdh-and-aes128-for-the-data-encryption/

or the SDK 16.0 examples

examples\crypto\nrf_crypto\aes\aes_all_cli