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crypto: ccp - invoke fallback for XTS ciphertext stealing

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For correctness and compliance with the XTS-AES specification, we are
adding support for ciphertext stealing to XTS implementations, even
though no use cases are known that will be enabled by this.

Since the ccp driver already has a fallback skcipher standby for
dealing with input sizes other than [16, 512, 1024, 2048, 4096],
just drop the check against the block size.

Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: Gary Hook <gary.hook@amd.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Ard Biesheuvel 2019-08-22 18:47:31 +03:00 committed by Herbert Xu
parent 2be7f90161
commit c03a509304
1 changed files with 0 additions and 3 deletions
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3
drivers/crypto/ccp/ccp-crypto-aes-xts.c
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@ -116,9 +116,6 @@ static int ccp_aes_xts_crypt(struct ablkcipher_request *req,
if (!ctx->u.aes.key_len)
return -EINVAL;
if (req->nbytes & (AES_BLOCK_SIZE - 1))
return -EINVAL;
if (!req->info)
return -EINVAL;