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Subject[PATCH 4.14 001/165] crypto: vmx - Use skcipher for ctr fallback
Date
4.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Paulo Flabiano Smorigo <pfsmorigo@linux.vnet.ibm.com>

commit e666d4e9ceec94c0a88c94b7db31d56474da43b3 upstream.

Signed-off-by: Paulo Flabiano Smorigo <pfsmorigo@linux.vnet.ibm.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>


---
drivers/crypto/vmx/aes_ctr.c | 31 ++++++++++++++++---------------
1 file changed, 16 insertions(+), 15 deletions(-)

--- a/drivers/crypto/vmx/aes_ctr.c
+++ b/drivers/crypto/vmx/aes_ctr.c
@@ -27,21 +27,23 @@
#include <asm/switch_to.h>
#include <crypto/aes.h>
#include <crypto/scatterwalk.h>
+#include <crypto/skcipher.h>
+
#include "aesp8-ppc.h"

struct p8_aes_ctr_ctx {
- struct crypto_blkcipher *fallback;
+ struct crypto_skcipher *fallback;
struct aes_key enc_key;
};

static int p8_aes_ctr_init(struct crypto_tfm *tfm)
{
const char *alg = crypto_tfm_alg_name(tfm);
- struct crypto_blkcipher *fallback;
+ struct crypto_skcipher *fallback;
struct p8_aes_ctr_ctx *ctx = crypto_tfm_ctx(tfm);

- fallback =
- crypto_alloc_blkcipher(alg, 0, CRYPTO_ALG_NEED_FALLBACK);
+ fallback = crypto_alloc_skcipher(alg, 0,
+ CRYPTO_ALG_ASYNC | CRYPTO_ALG_NEED_FALLBACK);
if (IS_ERR(fallback)) {
printk(KERN_ERR
"Failed to allocate transformation for '%s': %ld\n",
@@ -49,9 +51,9 @@ static int p8_aes_ctr_init(struct crypto
return PTR_ERR(fallback);
}

- crypto_blkcipher_set_flags(
+ crypto_skcipher_set_flags(
fallback,
- crypto_blkcipher_get_flags((struct crypto_blkcipher *)tfm));
+ crypto_skcipher_get_flags((struct crypto_skcipher *)tfm));
ctx->fallback = fallback;

return 0;
@@ -62,7 +64,7 @@ static void p8_aes_ctr_exit(struct crypt
struct p8_aes_ctr_ctx *ctx = crypto_tfm_ctx(tfm);

if (ctx->fallback) {
- crypto_free_blkcipher(ctx->fallback);
+ crypto_free_skcipher(ctx->fallback);
ctx->fallback = NULL;
}
}
@@ -81,7 +83,7 @@ static int p8_aes_ctr_setkey(struct cryp
pagefault_enable();
preempt_enable();

- ret += crypto_blkcipher_setkey(ctx->fallback, key, keylen);
+ ret += crypto_skcipher_setkey(ctx->fallback, key, keylen);
return ret;
}

@@ -115,15 +117,14 @@ static int p8_aes_ctr_crypt(struct blkci
struct blkcipher_walk walk;
struct p8_aes_ctr_ctx *ctx =
crypto_tfm_ctx(crypto_blkcipher_tfm(desc->tfm));
- struct blkcipher_desc fallback_desc = {
- .tfm = ctx->fallback,
- .info = desc->info,
- .flags = desc->flags
- };

if (in_interrupt()) {
- ret = crypto_blkcipher_encrypt(&fallback_desc, dst, src,
- nbytes);
+ SKCIPHER_REQUEST_ON_STACK(req, ctx->fallback);
+ skcipher_request_set_tfm(req, ctx->fallback);
+ skcipher_request_set_callback(req, desc->flags, NULL, NULL);
+ skcipher_request_set_crypt(req, src, dst, nbytes, desc->info);
+ ret = crypto_skcipher_encrypt(req);
+ skcipher_request_zero(req);
} else {
blkcipher_walk_init(&walk, dst, src, nbytes);
ret = blkcipher_walk_virt_block(desc, &walk, AES_BLOCK_SIZE);

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