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TOMOYO Linux Cross Reference
Linux/fs/crypto/Kconfig

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  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, UBIFS, and CephFS 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.

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