Help¶

If this option is set TinyCrypt library is used for emulating the ECDH HCI commands and events needed by e.g. LE Secure Connections. In builds including the BLE Host, if not set the controller crypto is used for ECDH and if the controller doesn’t support the required HCI commands the LE Secure Connections support will be disabled. In builds including the HCI Raw interface and the BLE Controller, this option injects support for the 2 HCI commands required for LE Secure Connections so that Hosts can make use of those. The option defaults to enabled for a combined build with Zephyr’s own controller, since it does not have any special ECC support itself (at least not currently).

Direct dependencies¶

(BT_HCI_RAW || BT_HCI_HOST) && BT_HCI && BT

(Includes any dependencies from if’s and menus.)

Defaults¶

“y” if BT_CTLR && (BT_SMP || BT_MESH_PROV) && (BT_HCI_RAW || BT_HCI_HOST) && BT_HCI && BT

Symbols selected by this symbol¶

TINYCRYPT if (BT_HCI_RAW || BT_HCI_HOST) && BT_HCI && BT
TINYCRYPT_ECC_DH if (BT_HCI_RAW || BT_HCI_HOST) && BT_HCI && BT

Kconfig definition¶

At subsys/bluetooth/host/Kconfig:405

Included via Kconfig:10 → Kconfig.zephyr:35 → subsys/Kconfig:8 → subsys/bluetooth/Kconfig:155

Menu path: (top menu) → Bluetooth

config BT_TINYCRYPT_ECC
    bool
    prompt "Use TinyCrypt library for ECDH" if (BT_HCI_RAW || BT_HCI_HOST) && BT_HCI && BT
    default "y" if BT_CTLR && (BT_SMP || BT_MESH_PROV) && (BT_HCI_RAW || BT_HCI_HOST) && BT_HCI && BT
    select TINYCRYPT if (BT_HCI_RAW || BT_HCI_HOST) && BT_HCI && BT
    select TINYCRYPT_ECC_DH if (BT_HCI_RAW || BT_HCI_HOST) && BT_HCI && BT
    depends on (BT_HCI_RAW || BT_HCI_HOST) && BT_HCI && BT
    help
      If this option is set TinyCrypt library is used for emulating the
      ECDH HCI commands and events needed by e.g. LE Secure Connections.
      In builds including the BLE Host, if not set the controller crypto is
      used for ECDH and if the controller doesn't support the required HCI
      commands the LE Secure Connections support will be disabled.
      In builds including the HCI Raw interface and the BLE Controller, this
      option injects support for the 2 HCI commands required for LE Secure
      Connections so that Hosts can make use of those. The option defaults
      to enabled for a combined build with Zephyr's own controller, since it
      does not have any special ECC support itself (at least not currently).

(Definitions include propagated dependencies, including from if’s and menus.)