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| author | Vladis Dronov <vdronov@redhat.com> | 2022-12-29 22:17:06 +0100 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2023-01-06 17:15:47 +0800 |
| commit | 0ee433676e4f499cb65f3d375a60a0ac54af4c47 (patch) | |
| tree | 39a9fa290f98b70faf6b409f9e9344109834bcb6 /include/crypto | |
| parent | 1c4428b295884316eaff16be9c1d85f7c2361696 (diff) | |
| download | linux-next-0ee433676e4f499cb65f3d375a60a0ac54af4c47.tar.gz | |
crypto: xts - drop xts_check_key()
xts_check_key() is obsoleted by xts_verify_key(). Over time XTS crypto
drivers adopted the newer xts_verify_key() variant, but xts_check_key()
is still used by a number of drivers. Switch drivers to use the newer
xts_verify_key() and make a couple of cleanups. This allows us to drop
xts_check_key() completely and avoid redundancy.
Signed-off-by: Vladis Dronov <vdronov@redhat.com>
Reviewed-by: Eric Biggers <ebiggers@google.com>
Reviewed-by: Nicolai Stange <nstange@suse.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'include/crypto')
| -rw-r--r-- | include/crypto/xts.h | 22 |
1 files changed, 4 insertions, 18 deletions
diff --git a/include/crypto/xts.h b/include/crypto/xts.h index a233c1054df2..15b16c4853d8 100644 --- a/include/crypto/xts.h +++ b/include/crypto/xts.h @@ -8,23 +8,6 @@ #define XTS_BLOCK_SIZE 16 -static inline int xts_check_key(struct crypto_tfm *tfm, - const u8 *key, unsigned int keylen) -{ - /* - * key consists of keys of equal size concatenated, therefore - * the length must be even. - */ - if (keylen % 2) - return -EINVAL; - - /* ensure that the AES and tweak key are not identical */ - if (fips_enabled && !crypto_memneq(key, key + (keylen / 2), keylen / 2)) - return -EINVAL; - - return 0; -} - static inline int xts_verify_key(struct crypto_skcipher *tfm, const u8 *key, unsigned int keylen) { @@ -42,7 +25,10 @@ static inline int xts_verify_key(struct crypto_skcipher *tfm, if (fips_enabled && keylen != 32 && keylen != 64) return -EINVAL; - /* ensure that the AES and tweak key are not identical */ + /* + * Ensure that the AES and tweak key are not identical when + * in FIPS mode or the FORBID_WEAK_KEYS flag is set. + */ if ((fips_enabled || (crypto_skcipher_get_flags(tfm) & CRYPTO_TFM_REQ_FORBID_WEAK_KEYS)) && !crypto_memneq(key, key + (keylen / 2), keylen / 2)) |