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Commit 678adecd authored by Herbert Xu's avatar Herbert Xu
Browse files

crypto: sahara - Use skcipher for fallback 



This patch replaces use of the obsolete ablkcipher with skcipher.

It also removes shash_fallback which is totally unused.

Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 2d20ce07

drivers/crypto/sahara.c

+50 −62
Original line number Diff line number Diff line
@@ -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,

	}

},

};