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crypto: x86/aesni - Correct the data type in struct aesni_xts_ctx

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Currently, every field in struct aesni_xts_ctx is defined as a byte
array of the same size as struct crypto_aes_ctx. This data type
is obscure and the choice lacks justification.

To rectify this, update the field type in struct aesni_xts_ctx to
match its actual structure.

Suggested-by: Eric Biggers <ebiggers@kernel.org>
Link: https://lore.kernel.org/all/ZFWQ4sZEVu%2FLHq+Q@gmail.com/
Signed-off-by: Chang S. Bae <chang.seok.bae@intel.com>
Cc: linux-crypto@vger.kernel.org
Cc: x86@kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Chang S. Bae 2023-09-28 00:25:07 -07:00 committed by Herbert Xu
parent 62496a2dea
commit d148736ff1
1 changed files with 9 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
arch/x86/crypto/aesni-intel_glue.c
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@ -61,8 +61,8 @@ struct generic_gcmaes_ctx {
}; };
struct aesni_xts_ctx { struct aesni_xts_ctx {
u8 raw_tweak_ctx[sizeof(struct crypto_aes_ctx)] AESNI_ALIGN_ATTR; struct crypto_aes_ctx tweak_ctx AESNI_ALIGN_ATTR;
u8 raw_crypt_ctx[sizeof(struct crypto_aes_ctx)] AESNI_ALIGN_ATTR; struct crypto_aes_ctx crypt_ctx AESNI_ALIGN_ATTR;
}; };
#define GCM_BLOCK_LEN 16 #define GCM_BLOCK_LEN 16
@ -885,13 +885,12 @@ static int xts_aesni_setkey(struct crypto_skcipher *tfm, const u8 *key,
keylen /= 2; keylen /= 2;
/* first half of xts-key is for crypt */ /* first half of xts-key is for crypt */
err = aes_set_key_common(aes_ctx(ctx->raw_crypt_ctx), key, keylen); err = aes_set_key_common(aes_ctx(&ctx->crypt_ctx), key, keylen);
if (err) if (err)
return err; return err;
/* second half of xts-key is for tweak */ /* second half of xts-key is for tweak */
return aes_set_key_common(aes_ctx(ctx->raw_tweak_ctx), key + keylen, return aes_set_key_common(aes_ctx(&ctx->tweak_ctx), key + keylen, keylen);
keylen);
} }
static int xts_crypt(struct skcipher_request *req, bool encrypt) static int xts_crypt(struct skcipher_request *req, bool encrypt)
@ -933,7 +932,7 @@ static int xts_crypt(struct skcipher_request *req, bool encrypt)
kernel_fpu_begin(); kernel_fpu_begin();
/* calculate first value of T */ /* calculate first value of T */
aesni_enc(aes_ctx(ctx->raw_tweak_ctx), walk.iv, walk.iv); aesni_enc(aes_ctx(&ctx->tweak_ctx), walk.iv, walk.iv);
while (walk.nbytes > 0) { while (walk.nbytes > 0) {
int nbytes = walk.nbytes; int nbytes = walk.nbytes;
@ -942,11 +941,11 @@ static int xts_crypt(struct skcipher_request *req, bool encrypt)
nbytes &= ~(AES_BLOCK_SIZE - 1); nbytes &= ~(AES_BLOCK_SIZE - 1);
if (encrypt) if (encrypt)
aesni_xts_encrypt(aes_ctx(ctx->raw_crypt_ctx), aesni_xts_encrypt(aes_ctx(&ctx->crypt_ctx),
walk.dst.virt.addr, walk.src.virt.addr, walk.dst.virt.addr, walk.src.virt.addr,
nbytes, walk.iv); nbytes, walk.iv);
else else
aesni_xts_decrypt(aes_ctx(ctx->raw_crypt_ctx), aesni_xts_decrypt(aes_ctx(&ctx->crypt_ctx),
walk.dst.virt.addr, walk.src.virt.addr, walk.dst.virt.addr, walk.src.virt.addr,
nbytes, walk.iv); nbytes, walk.iv);
kernel_fpu_end(); kernel_fpu_end();
@ -974,11 +973,11 @@ static int xts_crypt(struct skcipher_request *req, bool encrypt)
kernel_fpu_begin(); kernel_fpu_begin();
if (encrypt) if (encrypt)
aesni_xts_encrypt(aes_ctx(ctx->raw_crypt_ctx), aesni_xts_encrypt(aes_ctx(&ctx->crypt_ctx),
walk.dst.virt.addr, walk.src.virt.addr, walk.dst.virt.addr, walk.src.virt.addr,
walk.nbytes, walk.iv); walk.nbytes, walk.iv);
else else
aesni_xts_decrypt(aes_ctx(ctx->raw_crypt_ctx), aesni_xts_decrypt(aes_ctx(&ctx->crypt_ctx),
walk.dst.virt.addr, walk.src.virt.addr, walk.dst.virt.addr, walk.src.virt.addr,
walk.nbytes, walk.iv); walk.nbytes, walk.iv);
kernel_fpu_end(); kernel_fpu_end();