fs/crypto/Kconfig

   1 # SPDX-License-Identifier: GPL-2.0-only
   2 config FS_ENCRYPTION
   3         bool "FS Encryption (Per-file encryption)"
   4         select CRYPTO
   5         select CRYPTO_HASH
   6         select CRYPTO_SKCIPHER
   7         select CRYPTO_LIB_SHA256
   8         select KEYS
   9         help
  10           Enable encryption of files and directories.  This
  11           feature is similar to ecryptfs, but it is more memory
  12           efficient since it avoids caching the encrypted and
  13           decrypted pages in the page cache.  Currently Ext4,
  14           F2FS and UBIFS make use of this feature.
  15
  16 # Filesystems supporting encryption must select this if FS_ENCRYPTION.  This
  17 # allows the algorithms to be built as modules when all the filesystems are,
  18 # whereas selecting them from FS_ENCRYPTION would force them to be built-in.
  19 #
  20 # Note: this option only pulls in the algorithms that filesystem encryption
  21 # needs "by default".  If userspace will use "non-default" encryption modes such
  22 # as Adiantum encryption, then those other modes need to be explicitly enabled
  23 # in the crypto API; see Documentation/filesystems/fscrypt.rst for details.
  24 #
  25 # Also note that this option only pulls in the generic implementations of the
  26 # algorithms, not any per-architecture optimized implementations.  It is
  27 # strongly recommended to enable optimized implementations too.  It is safe to
  28 # disable these generic implementations if corresponding optimized
  29 # implementations will always be available too; for this reason, these are soft
  30 # dependencies ('imply' rather than 'select').  Only disable these generic
  31 # implementations if you're sure they will never be needed, though.
  32 config FS_ENCRYPTION_ALGS
  33         tristate
  34         imply CRYPTO_AES
  35         imply CRYPTO_CBC
  36         imply CRYPTO_CTS
  37         imply CRYPTO_ECB
  38         imply CRYPTO_HMAC
  39         imply CRYPTO_SHA512
  40         imply CRYPTO_XTS
  41
  42 config FS_ENCRYPTION_INLINE_CRYPT
  43         bool "Enable fscrypt to use inline crypto"
  44         depends on FS_ENCRYPTION && BLK_INLINE_ENCRYPTION
  45         help
  46           Enable fscrypt to use inline encryption hardware if available.