Add "xts(camellia)", "xts(serpent)", and "xts(twofish)" to the allowlist for af_alg_restrict=1. These niche AES alternatives have continued to see rare but persistent use via cryptsetup, which has historically relied on the AF_ALG support for these ciphers in XTS mode for performing the keyslot encryption. (cryptsetup v2.8.7 and later fall back to a temporary dm-crypt mapping, but that requires root.)
Signed-off-by: Eric Biggers <[email protected]> --- crypto/algif_skcipher.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/crypto/algif_skcipher.c b/crypto/algif_skcipher.c index 2b8069667974..49ae779b3b6b 100644 --- a/crypto/algif_skcipher.c +++ b/crypto/algif_skcipher.c @@ -45,6 +45,9 @@ static const struct af_alg_allowlist_entry skcipher_allowlist[] = { { "ecb(des)", true }, /* iwd */ { "hctr2(aes)", false }, /* cryptsetup */ { "xts(aes)", false }, /* cryptsetup benchmark */ + { "xts(camellia)", false }, /* cryptsetup */ + { "xts(serpent)", false }, /* cryptsetup */ + { "xts(twofish)", false }, /* cryptsetup */ {}, }; base-commit: e264401ce4776a288524e5b87593d4d864147115 -- 2.54.0
