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crypto: sahara - Use skcipher for fallback

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This patch replaces use of the obsolete ablkcipher with skcipher.

It also removes shash_fallback which is totally unused.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu 2016-06-29 18:04:05 +08:00
parent 2d20ce070d
commit 678adecd11
1 changed files with 50 additions and 62 deletions
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112
drivers/crypto/sahara.c
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@ -14,10 +14,9 @@
* Based on omap-aes.c and tegra-aes.c
*/
#include <crypto/algapi.h>
#include <crypto/aes.h>
#include <crypto/hash.h>
#include <crypto/internal/hash.h>
#include <crypto/internal/skcipher.h>
#include <crypto/scatterwalk.h>
#include <crypto/sha.h>
@ -150,10 +149,7 @@ struct sahara_ctx {
/* AES-specific context */
int keylen;
u8 key[AES_KEYSIZE_128];
struct crypto_ablkcipher *fallback;
/* SHA-specific context */
struct crypto_shash *shash_fallback;
struct crypto_skcipher *fallback;
};
struct sahara_aes_reqctx {
@ -620,25 +616,21 @@ static int sahara_aes_setkey(struct crypto_ablkcipher *tfm, const u8 *key,
return 0;
}
if (keylen != AES_KEYSIZE_128 &&
keylen != AES_KEYSIZE_192 && keylen != AES_KEYSIZE_256)
if (keylen != AES_KEYSIZE_192 && keylen != AES_KEYSIZE_256)
return -EINVAL;
/*
* The requested key size is not supported by HW, do a fallback.
*/
ctx->fallback->base.crt_flags &= ~CRYPTO_TFM_REQ_MASK;
ctx->fallback->base.crt_flags |=
(tfm->base.crt_flags & CRYPTO_TFM_REQ_MASK);
crypto_skcipher_clear_flags(ctx->fallback, CRYPTO_TFM_REQ_MASK);
crypto_skcipher_set_flags(ctx->fallback, tfm->base.crt_flags &
CRYPTO_TFM_REQ_MASK);
ret = crypto_ablkcipher_setkey(ctx->fallback, key, keylen);
if (ret) {
struct crypto_tfm *tfm_aux = crypto_ablkcipher_tfm(tfm);
ret = crypto_skcipher_setkey(ctx->fallback, key, keylen);
tfm_aux->crt_flags &= ~CRYPTO_TFM_RES_MASK;
tfm_aux->crt_flags |=
(ctx->fallback->base.crt_flags & CRYPTO_TFM_RES_MASK);
}
tfm->base.crt_flags &= ~CRYPTO_TFM_RES_MASK;
tfm->base.crt_flags |= crypto_skcipher_get_flags(ctx->fallback) &
CRYPTO_TFM_RES_MASK;
return ret;
}
@ -670,16 +662,20 @@ static int sahara_aes_crypt(struct ablkcipher_request *req, unsigned long mode)
static int sahara_aes_ecb_encrypt(struct ablkcipher_request *req)
{
struct crypto_tfm *tfm =
crypto_ablkcipher_tfm(crypto_ablkcipher_reqtfm(req));
struct sahara_ctx *ctx = crypto_ablkcipher_ctx(
crypto_ablkcipher_reqtfm(req));
int err;
if (unlikely(ctx->keylen != AES_KEYSIZE_128)) {
ablkcipher_request_set_tfm(req, ctx->fallback);
err = crypto_ablkcipher_encrypt(req);
ablkcipher_request_set_tfm(req, __crypto_ablkcipher_cast(tfm));
SKCIPHER_REQUEST_ON_STACK(subreq, ctx->fallback);
skcipher_request_set_tfm(subreq, ctx->fallback);
skcipher_request_set_callback(subreq, req->base.flags,
NULL, NULL);
skcipher_request_set_crypt(subreq, req->src, req->dst,
req->nbytes, req->info);
err = crypto_skcipher_encrypt(subreq);
skcipher_request_zero(subreq);
return err;
}
@ -688,16 +684,20 @@ static int sahara_aes_ecb_encrypt(struct ablkcipher_request *req)
static int sahara_aes_ecb_decrypt(struct ablkcipher_request *req)
{
struct crypto_tfm *tfm =
crypto_ablkcipher_tfm(crypto_ablkcipher_reqtfm(req));
struct sahara_ctx *ctx = crypto_ablkcipher_ctx(
crypto_ablkcipher_reqtfm(req));
int err;
if (unlikely(ctx->keylen != AES_KEYSIZE_128)) {
ablkcipher_request_set_tfm(req, ctx->fallback);
err = crypto_ablkcipher_decrypt(req);
ablkcipher_request_set_tfm(req, __crypto_ablkcipher_cast(tfm));
SKCIPHER_REQUEST_ON_STACK(subreq, ctx->fallback);
skcipher_request_set_tfm(subreq, ctx->fallback);
skcipher_request_set_callback(subreq, req->base.flags,
NULL, NULL);
skcipher_request_set_crypt(subreq, req->src, req->dst,
req->nbytes, req->info);
err = crypto_skcipher_decrypt(subreq);
skcipher_request_zero(subreq);
return err;
}
@ -706,16 +706,20 @@ static int sahara_aes_ecb_decrypt(struct ablkcipher_request *req)
static int sahara_aes_cbc_encrypt(struct ablkcipher_request *req)
{
struct crypto_tfm *tfm =
crypto_ablkcipher_tfm(crypto_ablkcipher_reqtfm(req));
struct sahara_ctx *ctx = crypto_ablkcipher_ctx(
crypto_ablkcipher_reqtfm(req));
int err;
if (unlikely(ctx->keylen != AES_KEYSIZE_128)) {
ablkcipher_request_set_tfm(req, ctx->fallback);
err = crypto_ablkcipher_encrypt(req);
ablkcipher_request_set_tfm(req, __crypto_ablkcipher_cast(tfm));
SKCIPHER_REQUEST_ON_STACK(subreq, ctx->fallback);
skcipher_request_set_tfm(subreq, ctx->fallback);
skcipher_request_set_callback(subreq, req->base.flags,
NULL, NULL);
skcipher_request_set_crypt(subreq, req->src, req->dst,
req->nbytes, req->info);
err = crypto_skcipher_encrypt(subreq);
skcipher_request_zero(subreq);
return err;
}
@ -724,16 +728,20 @@ static int sahara_aes_cbc_encrypt(struct ablkcipher_request *req)
static int sahara_aes_cbc_decrypt(struct ablkcipher_request *req)
{
struct crypto_tfm *tfm =
crypto_ablkcipher_tfm(crypto_ablkcipher_reqtfm(req));
struct sahara_ctx *ctx = crypto_ablkcipher_ctx(
crypto_ablkcipher_reqtfm(req));
int err;
if (unlikely(ctx->keylen != AES_KEYSIZE_128)) {
ablkcipher_request_set_tfm(req, ctx->fallback);
err = crypto_ablkcipher_decrypt(req);
ablkcipher_request_set_tfm(req, __crypto_ablkcipher_cast(tfm));
SKCIPHER_REQUEST_ON_STACK(subreq, ctx->fallback);
skcipher_request_set_tfm(subreq, ctx->fallback);
skcipher_request_set_callback(subreq, req->base.flags,
NULL, NULL);
skcipher_request_set_crypt(subreq, req->src, req->dst,
req->nbytes, req->info);
err = crypto_skcipher_decrypt(subreq);
skcipher_request_zero(subreq);
return err;
}
@ -745,8 +753,9 @@ static int sahara_aes_cra_init(struct crypto_tfm *tfm)
const char *name = crypto_tfm_alg_name(tfm);
struct sahara_ctx *ctx = crypto_tfm_ctx(tfm);
ctx->fallback = crypto_alloc_ablkcipher(name, 0,
CRYPTO_ALG_ASYNC | CRYPTO_ALG_NEED_FALLBACK);
ctx->fallback = crypto_alloc_skcipher(name, 0,
CRYPTO_ALG_ASYNC |
CRYPTO_ALG_NEED_FALLBACK);
if (IS_ERR(ctx->fallback)) {
pr_err("Error allocating fallback algo %s\n", name);
return PTR_ERR(ctx->fallback);
@ -761,9 +770,7 @@ static void sahara_aes_cra_exit(struct crypto_tfm *tfm)
{
struct sahara_ctx *ctx = crypto_tfm_ctx(tfm);
if (ctx->fallback)
crypto_free_ablkcipher(ctx->fallback);
ctx->fallback = NULL;
crypto_free_skcipher(ctx->fallback);
}
static u32 sahara_sha_init_hdr(struct sahara_dev *dev,
@ -1180,15 +1187,6 @@ static int sahara_sha_import(struct ahash_request *req, const void *in)
static int sahara_sha_cra_init(struct crypto_tfm *tfm)
{
const char *name = crypto_tfm_alg_name(tfm);
struct sahara_ctx *ctx = crypto_tfm_ctx(tfm);
ctx->shash_fallback = crypto_alloc_shash(name, 0,
CRYPTO_ALG_NEED_FALLBACK);
if (IS_ERR(ctx->shash_fallback)) {
pr_err("Error allocating fallback algo %s\n", name);
return PTR_ERR(ctx->shash_fallback);
}
crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
sizeof(struct sahara_sha_reqctx) +
SHA_BUFFER_LEN + SHA256_BLOCK_SIZE);
@ -1196,14 +1194,6 @@ static int sahara_sha_cra_init(struct crypto_tfm *tfm)
return 0;
}
static void sahara_sha_cra_exit(struct crypto_tfm *tfm)
{
struct sahara_ctx *ctx = crypto_tfm_ctx(tfm);
crypto_free_shash(ctx->shash_fallback);
ctx->shash_fallback = NULL;
}
static struct crypto_alg aes_algs[] = {
{
.cra_name = "ecb(aes)",
@ -1272,7 +1262,6 @@ static struct ahash_alg sha_v3_algs[] = {
.cra_alignmask = 0,
.cra_module = THIS_MODULE,
.cra_init = sahara_sha_cra_init,
.cra_exit = sahara_sha_cra_exit,
}
},
};
@ -1300,7 +1289,6 @@ static struct ahash_alg sha_v4_algs[] = {
.cra_alignmask = 0,
.cra_module = THIS_MODULE,
.cra_init = sahara_sha_cra_init,
.cra_exit = sahara_sha_cra_exit,
}
},
};