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crypto: picoxcell - Use skcipher for fallback

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This patch replaces use of the obsolete ablkcipher with skcipher.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu 2016-06-29 18:04:03 +08:00
parent 29406bb923
commit 1eb60ff82d
1 changed files with 31 additions and 29 deletions
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60
drivers/crypto/picoxcell_crypto.c
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@ -171,7 +171,7 @@ struct spacc_ablk_ctx {
* The fallback cipher. If the operation can't be done in hardware,
* fallback to a software version.
*/
struct crypto_ablkcipher *sw_cipher;
struct crypto_skcipher *sw_cipher;
};
/* AEAD cipher context. */
@ -789,33 +789,35 @@ static int spacc_aes_setkey(struct crypto_ablkcipher *cipher, const u8 *key,
* request for any other size (192 bits) then we need to do a software
* fallback.
*/
if (len != AES_KEYSIZE_128 && len != AES_KEYSIZE_256 &&
ctx->sw_cipher) {
if (len != AES_KEYSIZE_128 && len != AES_KEYSIZE_256) {
if (!ctx->sw_cipher)
return -EINVAL;
/*
* Set the fallback transform to use the same request flags as
* the hardware transform.
*/
ctx->sw_cipher->base.crt_flags &= ~CRYPTO_TFM_REQ_MASK;
ctx->sw_cipher->base.crt_flags |=
cipher->base.crt_flags & CRYPTO_TFM_REQ_MASK;
crypto_skcipher_clear_flags(ctx->sw_cipher,
CRYPTO_TFM_REQ_MASK);
crypto_skcipher_set_flags(ctx->sw_cipher,
cipher->base.crt_flags &
CRYPTO_TFM_REQ_MASK);
err = crypto_skcipher_setkey(ctx->sw_cipher, key, len);
tfm->crt_flags &= ~CRYPTO_TFM_RES_MASK;
tfm->crt_flags |=
crypto_skcipher_get_flags(ctx->sw_cipher) &
CRYPTO_TFM_RES_MASK;
err = crypto_ablkcipher_setkey(ctx->sw_cipher, key, len);
if (err)
goto sw_setkey_failed;
} else if (len != AES_KEYSIZE_128 && len != AES_KEYSIZE_256 &&
!ctx->sw_cipher)
err = -EINVAL;
}
memcpy(ctx->key, key, len);
ctx->key_len = len;
sw_setkey_failed:
if (err && ctx->sw_cipher) {
tfm->crt_flags &= ~CRYPTO_TFM_RES_MASK;
tfm->crt_flags |=
ctx->sw_cipher->base.crt_flags & CRYPTO_TFM_RES_MASK;
}
return err;
}
@ -910,20 +912,21 @@ static int spacc_ablk_do_fallback(struct ablkcipher_request *req,
struct crypto_tfm *old_tfm =
crypto_ablkcipher_tfm(crypto_ablkcipher_reqtfm(req));
struct spacc_ablk_ctx *ctx = crypto_tfm_ctx(old_tfm);
SKCIPHER_REQUEST_ON_STACK(subreq, ctx->sw_cipher);
int err;
if (!ctx->sw_cipher)
return -EINVAL;
/*
* Change the request to use the software fallback transform, and once
* the ciphering has completed, put the old transform back into the
* request.
*/
ablkcipher_request_set_tfm(req, ctx->sw_cipher);
err = is_encrypt ? crypto_ablkcipher_encrypt(req) :
crypto_ablkcipher_decrypt(req);
ablkcipher_request_set_tfm(req, __crypto_ablkcipher_cast(old_tfm));
skcipher_request_set_tfm(subreq, ctx->sw_cipher);
skcipher_request_set_callback(subreq, req->base.flags, NULL, NULL);
skcipher_request_set_crypt(subreq, req->src, req->dst,
req->nbytes, req->info);
err = is_encrypt ? crypto_skcipher_encrypt(subreq) :
crypto_skcipher_decrypt(subreq);
skcipher_request_zero(subreq);
return err;
}
@ -1015,12 +1018,13 @@ static int spacc_ablk_cra_init(struct crypto_tfm *tfm)
ctx->generic.flags = spacc_alg->type;
ctx->generic.engine = engine;
if (alg->cra_flags & CRYPTO_ALG_NEED_FALLBACK) {
ctx->sw_cipher = crypto_alloc_ablkcipher(alg->cra_name, 0,
CRYPTO_ALG_ASYNC | CRYPTO_ALG_NEED_FALLBACK);
ctx->sw_cipher = crypto_alloc_skcipher(
alg->cra_name, 0, CRYPTO_ALG_ASYNC |
CRYPTO_ALG_NEED_FALLBACK);
if (IS_ERR(ctx->sw_cipher)) {
dev_warn(engine->dev, "failed to allocate fallback for %s\n",
alg->cra_name);
ctx->sw_cipher = NULL;
return PTR_ERR(ctx->sw_cipher);
}
}
ctx->generic.key_offs = spacc_alg->key_offs;
@ -1035,9 +1039,7 @@ static void spacc_ablk_cra_exit(struct crypto_tfm *tfm)
{
struct spacc_ablk_ctx *ctx = crypto_tfm_ctx(tfm);
if (ctx->sw_cipher)
crypto_free_ablkcipher(ctx->sw_cipher);
ctx->sw_cipher = NULL;
crypto_free_skcipher(ctx->sw_cipher);
}
static int spacc_ablk_encrypt(struct ablkcipher_request *req)