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crypto: ccree - allow bigger than sector XTS op

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The ccree driver had a sanity check that we are not asked
to encrypt an XTS buffer bigger than a sane sector size
since XTS IV needs to include the sector number in the IV
so this is not expected in any real use case.

Unfortunately, this breaks cryptsetup benchmark test which
has a synthetic performance test using 64k buffer of data
with the same IV.

Remove the sanity check and allow the user to hang themselves
and/or run benchmarks if they so wish.

Reported-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Gilad Ben-Yossef 2018-07-24 15:12:46 +01:00 committed by Herbert Xu
parent e30368f3f3
commit f53ad3e1b3
1 changed files with 1 additions and 4 deletions
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5
drivers/crypto/ccree/cc_cipher.c
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@ -19,8 +19,6 @@
#define template_skcipher template_u.skcipher
#define CC_MIN_AES_XTS_SIZE 0x10
#define CC_MAX_AES_XTS_SIZE 0x2000
struct cc_cipher_handle {
struct list_head alg_list;
};
@ -98,8 +96,7 @@ static int validate_data_size(struct cc_cipher_ctx *ctx_p,
case S_DIN_to_AES:
switch (ctx_p->cipher_mode) {
case DRV_CIPHER_XTS:
if (size >= CC_MIN_AES_XTS_SIZE &&
size <= CC_MAX_AES_XTS_SIZE &&
if (size >= AES_BLOCK_SIZE &&
IS_ALIGNED(size, AES_BLOCK_SIZE))
return 0;
break;