Help¶

Enable support for zeros and length padding for CBC cipher functions in mbedTLS. That is, fill buffer with 00 .. 00 ll, where ll is padding length.

Direct dependencies¶

MBEDTLS_CIPHER_MODE_CBC && MBEDTLS_CIPHER_MODE_CBC && MBEDTLS_AES_C && NRF_SECURITY_ANY_BACKEND && NORDIC_SECURITY_BACKEND

(Includes any dependencies from ifs and menus.)

Default¶

y

Kconfig definition¶

At <nrfxlib>/nrf_security/Kconfig:415

Included via <Zephyr>/Kconfig:8 → <Zephyr>/Kconfig.zephyr:9 → <BuildDir>/Kconfig/Kconfig.modules:5 → <nrfxlib>/Kconfig.nrfxlib:13

Menu path: (Top) → Modules → Nordic nrfxlib → Nordic Security → Use Nordic provided security backend → AES - Advanced Encryption Standard → AES-CBC - AES Cipher Block Chaining mode → CBC cipher padding modes

config MBEDTLS_CIPHER_PADDING_ZEROS_AND_LEN
    bool "Enable MBEDTLS_CIPHER_PADDING_ZEROS_AND_LEN"
    default y
    depends on MBEDTLS_CIPHER_MODE_CBC && MBEDTLS_CIPHER_MODE_CBC && MBEDTLS_AES_C && NRF_SECURITY_ANY_BACKEND && NORDIC_SECURITY_BACKEND
    help
      Enable support for zeros and length padding for CBC cipher functions in mbedTLS.
      That is, fill buffer with 00 .. 00 ll, where ll is padding length.

(The ‘depends on’ condition includes propagated dependencies from ifs and menus.)