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From: Ard Biesheuvel <ardb@kernel.org>
To: linux-crypto@vger.kernel.org
Cc: Ard Biesheuvel <ardb@kernel.org>,
	Herbert Xu <herbert@gondor.apana.org.au>,
	"David S. Miller" <davem@davemloft.net>,
	Eric Biggers <ebiggers@google.com>,
	linux-arm-kernel@lists.infradead.org,
	"Michael S. Tsirkin" <mst@redhat.com>,
	Jason Wang <jasowang@redhat.com>,
	Gonglei <arei.gonglei@huawei.com>,
	virtualization@lists.linux-foundation.org
Subject: [PATCH v4 01/29] crypto: virtio - implement missing support for output IVs
Date: Sat,  9 Nov 2019 18:09:26 +0100
Message-ID: <20191109170954.756-2-ardb@kernel.org> (raw)
In-Reply-To: <20191109170954.756-1-ardb@kernel.org>

In order to allow for CBC to be chained, which is something that the
CTS template relies upon, implementations of CBC need to pass the
IV to be used for subsequent invocations via the IV buffer. This was
not implemented yet for virtio-crypto so implement it now.

Fixes: dbaf0624ffa5 ("crypto: add virtio-crypto driver")
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Jason Wang <jasowang@redhat.com>
Cc: Gonglei <arei.gonglei@huawei.com>
Cc: virtualization@lists.linux-foundation.org
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
---
 drivers/crypto/virtio/virtio_crypto_algs.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/crypto/virtio/virtio_crypto_algs.c b/drivers/crypto/virtio/virtio_crypto_algs.c
index 42d19205166b..65ec10800137 100644
--- a/drivers/crypto/virtio/virtio_crypto_algs.c
+++ b/drivers/crypto/virtio/virtio_crypto_algs.c
@@ -437,6 +437,11 @@ __virtio_crypto_ablkcipher_do_req(struct virtio_crypto_sym_request *vc_sym_req,
 		goto free;
 	}
 	memcpy(iv, req->info, ivsize);
+	if (!vc_sym_req->encrypt)
+		scatterwalk_map_and_copy(req->info, req->src,
+					 req->nbytes - AES_BLOCK_SIZE,
+					 AES_BLOCK_SIZE, 0);
+
 	sg_init_one(&iv_sg, iv, ivsize);
 	sgs[num_out++] = &iv_sg;
 	vc_sym_req->iv = iv;
@@ -563,6 +568,10 @@ static void virtio_crypto_ablkcipher_finalize_req(
 	struct ablkcipher_request *req,
 	int err)
 {
+	if (vc_sym_req->encrypt)
+		scatterwalk_map_and_copy(req->info, req->dst,
+					 req->nbytes - AES_BLOCK_SIZE,
+					 AES_BLOCK_SIZE, 0);
 	crypto_finalize_ablkcipher_request(vc_sym_req->base.dataq->engine,
 					   req, err);
 	kzfree(vc_sym_req->iv);
-- 
2.17.1


  reply index

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-09 17:09 [PATCH v4 00/29] crypto: convert h/w accelerator drivers to skcipher API Ard Biesheuvel
2019-11-09 17:09 ` Ard Biesheuvel [this message]
2019-11-09 17:09 ` [PATCH v4 02/29] crypto: virtio - deal with unsupported input sizes Ard Biesheuvel
2019-11-09 17:09 ` [PATCH v4 03/29] crypto: virtio - switch to skcipher API Ard Biesheuvel
2019-11-09 17:09 ` [PATCH v4 04/29] crypto: ccp - switch from ablkcipher to skcipher Ard Biesheuvel
2019-11-09 17:09 ` [PATCH v4 05/29] crypto: omap - switch to skcipher API Ard Biesheuvel
2019-11-09 17:09 ` [PATCH v4 06/29] crypto: ux500 " Ard Biesheuvel
2019-11-09 17:09 ` [PATCH v4 07/29] crypto: s5p " Ard Biesheuvel
2019-11-09 17:09 ` [PATCH v4 08/29] crypto: atmel-aes " Ard Biesheuvel
2019-11-13 12:49   ` Tudor.Ambarus
2019-11-09 17:09 ` [PATCH v4 09/29] crypto: atmel-tdes " Ard Biesheuvel
2019-11-13 12:59   ` Tudor.Ambarus
2019-11-09 17:09 ` [PATCH v4 10/29] crypto: bcm-spu " Ard Biesheuvel
2019-11-09 17:09 ` [PATCH v4 11/29] crypto: nitrox - remove cra_type reference to ablkcipher Ard Biesheuvel
2019-11-09 17:09 ` [PATCH v4 12/29] crypto: cavium/cpt - switch to skcipher API Ard Biesheuvel
2019-11-09 17:09 ` [PATCH v4 13/29] crypto: chelsio " Ard Biesheuvel
2019-11-09 17:09 ` [PATCH v4 14/29] crypto: hifn " Ard Biesheuvel
2019-11-09 17:09 ` [PATCH v4 15/29] crypto: ixp4xx " Ard Biesheuvel
2019-11-09 17:09 ` [PATCH v4 16/29] crypto: mxs " Ard Biesheuvel
2019-11-09 17:09 ` [PATCH v4 17/29] crypto: mediatek " Ard Biesheuvel
2019-11-09 17:09 ` [PATCH v4 18/29] crypto: sahara " Ard Biesheuvel
2019-11-09 17:09 ` [PATCH v4 19/29] crypto: picoxcell " Ard Biesheuvel
2019-11-09 17:09 ` [PATCH v4 20/29] crypto: qce " Ard Biesheuvel
2019-11-09 17:09 ` [PATCH v4 21/29] crypto: stm32 " Ard Biesheuvel
2019-11-09 17:09 ` [PATCH v4 22/29] crypto: niagara2 " Ard Biesheuvel
2019-11-09 17:09 ` [PATCH v4 23/29] crypto: rockchip " Ard Biesheuvel
2019-11-09 17:09 ` [PATCH v4 24/29] crypto: talitos " Ard Biesheuvel
2019-11-09 17:09 ` [PATCH v4 25/29] crypto: qat " Ard Biesheuvel
2019-11-09 17:09 ` [PATCH v4 26/29] crypto: marvell/cesa - rename blkcipher to skcipher Ard Biesheuvel
2019-11-09 17:09 ` [PATCH v4 27/29] crypto: nx - remove stale comment referring to the blkcipher walk API Ard Biesheuvel
2019-11-09 17:09 ` [PATCH v4 28/29] crypto: remove deprecated and unused ablkcipher support Ard Biesheuvel
2019-11-09 17:09 ` [PATCH v4 29/29] crypto: ccree - update a stale reference to ablkcipher Ard Biesheuvel
2019-11-15  6:08 ` [PATCH v4 00/29] crypto: convert h/w accelerator drivers to skcipher API Herbert Xu

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