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path: root/drivers/crypto/virtio/virtio_crypto_algs.c
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Diffstat (limited to 'drivers/crypto/virtio/virtio_crypto_algs.c')
-rw-r--r--drivers/crypto/virtio/virtio_crypto_algs.c192
1 files changed, 102 insertions, 90 deletions
diff --git a/drivers/crypto/virtio/virtio_crypto_algs.c b/drivers/crypto/virtio/virtio_crypto_algs.c
index 42d19205166b..4b71e80951b7 100644
--- a/drivers/crypto/virtio/virtio_crypto_algs.c
+++ b/drivers/crypto/virtio/virtio_crypto_algs.c
@@ -8,6 +8,7 @@
#include <linux/scatterlist.h>
#include <crypto/algapi.h>
+#include <crypto/internal/skcipher.h>
#include <linux/err.h>
#include <crypto/scatterwalk.h>
#include <linux/atomic.h>
@@ -16,10 +17,10 @@
#include "virtio_crypto_common.h"
-struct virtio_crypto_ablkcipher_ctx {
+struct virtio_crypto_skcipher_ctx {
struct crypto_engine_ctx enginectx;
struct virtio_crypto *vcrypto;
- struct crypto_tfm *tfm;
+ struct crypto_skcipher *tfm;
struct virtio_crypto_sym_session_info enc_sess_info;
struct virtio_crypto_sym_session_info dec_sess_info;
@@ -30,8 +31,8 @@ struct virtio_crypto_sym_request {
/* Cipher or aead */
uint32_t type;
- struct virtio_crypto_ablkcipher_ctx *ablkcipher_ctx;
- struct ablkcipher_request *ablkcipher_req;
+ struct virtio_crypto_skcipher_ctx *skcipher_ctx;
+ struct skcipher_request *skcipher_req;
uint8_t *iv;
/* Encryption? */
bool encrypt;
@@ -41,7 +42,7 @@ struct virtio_crypto_algo {
uint32_t algonum;
uint32_t service;
unsigned int active_devs;
- struct crypto_alg algo;
+ struct skcipher_alg algo;
};
/*
@@ -49,9 +50,9 @@ struct virtio_crypto_algo {
* and crypto algorithms registion.
*/
static DEFINE_MUTEX(algs_lock);
-static void virtio_crypto_ablkcipher_finalize_req(
+static void virtio_crypto_skcipher_finalize_req(
struct virtio_crypto_sym_request *vc_sym_req,
- struct ablkcipher_request *req,
+ struct skcipher_request *req,
int err);
static void virtio_crypto_dataq_sym_callback
@@ -59,7 +60,7 @@ static void virtio_crypto_dataq_sym_callback
{
struct virtio_crypto_sym_request *vc_sym_req =
container_of(vc_req, struct virtio_crypto_sym_request, base);
- struct ablkcipher_request *ablk_req;
+ struct skcipher_request *ablk_req;
int error;
/* Finish the encrypt or decrypt process */
@@ -79,8 +80,8 @@ static void virtio_crypto_dataq_sym_callback
error = -EIO;
break;
}
- ablk_req = vc_sym_req->ablkcipher_req;
- virtio_crypto_ablkcipher_finalize_req(vc_sym_req,
+ ablk_req = vc_sym_req->skcipher_req;
+ virtio_crypto_skcipher_finalize_req(vc_sym_req,
ablk_req, error);
}
}
@@ -105,15 +106,13 @@ virtio_crypto_alg_validate_key(int key_len, uint32_t *alg)
*alg = VIRTIO_CRYPTO_CIPHER_AES_CBC;
break;
default:
- pr_err("virtio_crypto: Unsupported key length: %d\n",
- key_len);
return -EINVAL;
}
return 0;
}
-static int virtio_crypto_alg_ablkcipher_init_session(
- struct virtio_crypto_ablkcipher_ctx *ctx,
+static int virtio_crypto_alg_skcipher_init_session(
+ struct virtio_crypto_skcipher_ctx *ctx,
uint32_t alg, const uint8_t *key,
unsigned int keylen,
int encrypt)
@@ -202,8 +201,8 @@ static int virtio_crypto_alg_ablkcipher_init_session(
return 0;
}
-static int virtio_crypto_alg_ablkcipher_close_session(
- struct virtio_crypto_ablkcipher_ctx *ctx,
+static int virtio_crypto_alg_skcipher_close_session(
+ struct virtio_crypto_skcipher_ctx *ctx,
int encrypt)
{
struct scatterlist outhdr, status_sg, *sgs[2];
@@ -263,8 +262,8 @@ static int virtio_crypto_alg_ablkcipher_close_session(
return 0;
}
-static int virtio_crypto_alg_ablkcipher_init_sessions(
- struct virtio_crypto_ablkcipher_ctx *ctx,
+static int virtio_crypto_alg_skcipher_init_sessions(
+ struct virtio_crypto_skcipher_ctx *ctx,
const uint8_t *key, unsigned int keylen)
{
uint32_t alg;
@@ -280,30 +279,30 @@ static int virtio_crypto_alg_ablkcipher_init_sessions(
goto bad_key;
/* Create encryption session */
- ret = virtio_crypto_alg_ablkcipher_init_session(ctx,
+ ret = virtio_crypto_alg_skcipher_init_session(ctx,
alg, key, keylen, 1);
if (ret)
return ret;
/* Create decryption session */
- ret = virtio_crypto_alg_ablkcipher_init_session(ctx,
+ ret = virtio_crypto_alg_skcipher_init_session(ctx,
alg, key, keylen, 0);
if (ret) {
- virtio_crypto_alg_ablkcipher_close_session(ctx, 1);
+ virtio_crypto_alg_skcipher_close_session(ctx, 1);
return ret;
}
return 0;
bad_key:
- crypto_tfm_set_flags(ctx->tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
+ crypto_skcipher_set_flags(ctx->tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
return -EINVAL;
}
/* Note: kernel crypto API realization */
-static int virtio_crypto_ablkcipher_setkey(struct crypto_ablkcipher *tfm,
+static int virtio_crypto_skcipher_setkey(struct crypto_skcipher *tfm,
const uint8_t *key,
unsigned int keylen)
{
- struct virtio_crypto_ablkcipher_ctx *ctx = crypto_ablkcipher_ctx(tfm);
+ struct virtio_crypto_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
uint32_t alg;
int ret;
@@ -325,11 +324,11 @@ static int virtio_crypto_ablkcipher_setkey(struct crypto_ablkcipher *tfm,
ctx->vcrypto = vcrypto;
} else {
/* Rekeying, we should close the created sessions previously */
- virtio_crypto_alg_ablkcipher_close_session(ctx, 1);
- virtio_crypto_alg_ablkcipher_close_session(ctx, 0);
+ virtio_crypto_alg_skcipher_close_session(ctx, 1);
+ virtio_crypto_alg_skcipher_close_session(ctx, 0);
}
- ret = virtio_crypto_alg_ablkcipher_init_sessions(ctx, key, keylen);
+ ret = virtio_crypto_alg_skcipher_init_sessions(ctx, key, keylen);
if (ret) {
virtcrypto_dev_put(ctx->vcrypto);
ctx->vcrypto = NULL;
@@ -341,14 +340,14 @@ static int virtio_crypto_ablkcipher_setkey(struct crypto_ablkcipher *tfm,
}
static int
-__virtio_crypto_ablkcipher_do_req(struct virtio_crypto_sym_request *vc_sym_req,
- struct ablkcipher_request *req,
+__virtio_crypto_skcipher_do_req(struct virtio_crypto_sym_request *vc_sym_req,
+ struct skcipher_request *req,
struct data_queue *data_vq)
{
- struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req);
- struct virtio_crypto_ablkcipher_ctx *ctx = vc_sym_req->ablkcipher_ctx;
+ struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
+ struct virtio_crypto_skcipher_ctx *ctx = vc_sym_req->skcipher_ctx;
struct virtio_crypto_request *vc_req = &vc_sym_req->base;
- unsigned int ivsize = crypto_ablkcipher_ivsize(tfm);
+ unsigned int ivsize = crypto_skcipher_ivsize(tfm);
struct virtio_crypto *vcrypto = ctx->vcrypto;
struct virtio_crypto_op_data_req *req_data;
int src_nents, dst_nents;
@@ -361,7 +360,7 @@ __virtio_crypto_ablkcipher_do_req(struct virtio_crypto_sym_request *vc_sym_req,
int sg_total;
uint8_t *iv;
- src_nents = sg_nents_for_len(req->src, req->nbytes);
+ src_nents = sg_nents_for_len(req->src, req->cryptlen);
dst_nents = sg_nents(req->dst);
pr_debug("virtio_crypto: Number of sgs (src_nents: %d, dst_nents: %d)\n",
@@ -398,7 +397,7 @@ __virtio_crypto_ablkcipher_do_req(struct virtio_crypto_sym_request *vc_sym_req,
req_data->u.sym_req.op_type = cpu_to_le32(VIRTIO_CRYPTO_SYM_OP_CIPHER);
req_data->u.sym_req.u.cipher.para.iv_len = cpu_to_le32(ivsize);
req_data->u.sym_req.u.cipher.para.src_data_len =
- cpu_to_le32(req->nbytes);
+ cpu_to_le32(req->cryptlen);
dst_len = virtio_crypto_alg_sg_nents_length(req->dst);
if (unlikely(dst_len > U32_MAX)) {
@@ -408,9 +407,9 @@ __virtio_crypto_ablkcipher_do_req(struct virtio_crypto_sym_request *vc_sym_req,
}
pr_debug("virtio_crypto: src_len: %u, dst_len: %llu\n",
- req->nbytes, dst_len);
+ req->cryptlen, dst_len);
- if (unlikely(req->nbytes + dst_len + ivsize +
+ if (unlikely(req->cryptlen + dst_len + ivsize +
sizeof(vc_req->status) > vcrypto->max_size)) {
pr_err("virtio_crypto: The length is too big\n");
err = -EINVAL;
@@ -436,7 +435,12 @@ __virtio_crypto_ablkcipher_do_req(struct virtio_crypto_sym_request *vc_sym_req,
err = -ENOMEM;
goto free;
}
- memcpy(iv, req->info, ivsize);
+ memcpy(iv, req->iv, ivsize);
+ if (!vc_sym_req->encrypt)
+ scatterwalk_map_and_copy(req->iv, req->src,
+ req->cryptlen - AES_BLOCK_SIZE,
+ AES_BLOCK_SIZE, 0);
+
sg_init_one(&iv_sg, iv, ivsize);
sgs[num_out++] = &iv_sg;
vc_sym_req->iv = iv;
@@ -473,83 +477,93 @@ free:
return err;
}
-static int virtio_crypto_ablkcipher_encrypt(struct ablkcipher_request *req)
+static int virtio_crypto_skcipher_encrypt(struct skcipher_request *req)
{
- struct crypto_ablkcipher *atfm = crypto_ablkcipher_reqtfm(req);
- struct virtio_crypto_ablkcipher_ctx *ctx = crypto_ablkcipher_ctx(atfm);
+ struct crypto_skcipher *atfm = crypto_skcipher_reqtfm(req);
+ struct virtio_crypto_skcipher_ctx *ctx = crypto_skcipher_ctx(atfm);
struct virtio_crypto_sym_request *vc_sym_req =
- ablkcipher_request_ctx(req);
+ skcipher_request_ctx(req);
struct virtio_crypto_request *vc_req = &vc_sym_req->base;
struct virtio_crypto *vcrypto = ctx->vcrypto;
/* Use the first data virtqueue as default */
struct data_queue *data_vq = &vcrypto->data_vq[0];
+ if (!req->cryptlen)
+ return 0;
+ if (req->cryptlen % AES_BLOCK_SIZE)
+ return -EINVAL;
+
vc_req->dataq = data_vq;
vc_req->alg_cb = virtio_crypto_dataq_sym_callback;
- vc_sym_req->ablkcipher_ctx = ctx;
- vc_sym_req->ablkcipher_req = req;
+ vc_sym_req->skcipher_ctx = ctx;
+ vc_sym_req->skcipher_req = req;
vc_sym_req->encrypt = true;
- return crypto_transfer_ablkcipher_request_to_engine(data_vq->engine, req);
+ return crypto_transfer_skcipher_request_to_engine(data_vq->engine, req);
}
-static int virtio_crypto_ablkcipher_decrypt(struct ablkcipher_request *req)
+static int virtio_crypto_skcipher_decrypt(struct skcipher_request *req)
{
- struct crypto_ablkcipher *atfm = crypto_ablkcipher_reqtfm(req);
- struct virtio_crypto_ablkcipher_ctx *ctx = crypto_ablkcipher_ctx(atfm);
+ struct crypto_skcipher *atfm = crypto_skcipher_reqtfm(req);
+ struct virtio_crypto_skcipher_ctx *ctx = crypto_skcipher_ctx(atfm);
struct virtio_crypto_sym_request *vc_sym_req =
- ablkcipher_request_ctx(req);
+ skcipher_request_ctx(req);
struct virtio_crypto_request *vc_req = &vc_sym_req->base;
struct virtio_crypto *vcrypto = ctx->vcrypto;
/* Use the first data virtqueue as default */
struct data_queue *data_vq = &vcrypto->data_vq[0];
+ if (!req->cryptlen)
+ return 0;
+ if (req->cryptlen % AES_BLOCK_SIZE)
+ return -EINVAL;
+
vc_req->dataq = data_vq;
vc_req->alg_cb = virtio_crypto_dataq_sym_callback;
- vc_sym_req->ablkcipher_ctx = ctx;
- vc_sym_req->ablkcipher_req = req;
+ vc_sym_req->skcipher_ctx = ctx;
+ vc_sym_req->skcipher_req = req;
vc_sym_req->encrypt = false;
- return crypto_transfer_ablkcipher_request_to_engine(data_vq->engine, req);
+ return crypto_transfer_skcipher_request_to_engine(data_vq->engine, req);
}
-static int virtio_crypto_ablkcipher_init(struct crypto_tfm *tfm)
+static int virtio_crypto_skcipher_init(struct crypto_skcipher *tfm)
{
- struct virtio_crypto_ablkcipher_ctx *ctx = crypto_tfm_ctx(tfm);
+ struct virtio_crypto_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
- tfm->crt_ablkcipher.reqsize = sizeof(struct virtio_crypto_sym_request);
+ crypto_skcipher_set_reqsize(tfm, sizeof(struct virtio_crypto_sym_request));
ctx->tfm = tfm;
- ctx->enginectx.op.do_one_request = virtio_crypto_ablkcipher_crypt_req;
+ ctx->enginectx.op.do_one_request = virtio_crypto_skcipher_crypt_req;
ctx->enginectx.op.prepare_request = NULL;
ctx->enginectx.op.unprepare_request = NULL;
return 0;
}
-static void virtio_crypto_ablkcipher_exit(struct crypto_tfm *tfm)
+static void virtio_crypto_skcipher_exit(struct crypto_skcipher *tfm)
{
- struct virtio_crypto_ablkcipher_ctx *ctx = crypto_tfm_ctx(tfm);
+ struct virtio_crypto_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
if (!ctx->vcrypto)
return;
- virtio_crypto_alg_ablkcipher_close_session(ctx, 1);
- virtio_crypto_alg_ablkcipher_close_session(ctx, 0);
+ virtio_crypto_alg_skcipher_close_session(ctx, 1);
+ virtio_crypto_alg_skcipher_close_session(ctx, 0);
virtcrypto_dev_put(ctx->vcrypto);
ctx->vcrypto = NULL;
}
-int virtio_crypto_ablkcipher_crypt_req(
+int virtio_crypto_skcipher_crypt_req(
struct crypto_engine *engine, void *vreq)
{
- struct ablkcipher_request *req = container_of(vreq, struct ablkcipher_request, base);
+ struct skcipher_request *req = container_of(vreq, struct skcipher_request, base);
struct virtio_crypto_sym_request *vc_sym_req =
- ablkcipher_request_ctx(req);
+ skcipher_request_ctx(req);
struct virtio_crypto_request *vc_req = &vc_sym_req->base;
struct data_queue *data_vq = vc_req->dataq;
int ret;
- ret = __virtio_crypto_ablkcipher_do_req(vc_sym_req, req, data_vq);
+ ret = __virtio_crypto_skcipher_do_req(vc_sym_req, req, data_vq);
if (ret < 0)
return ret;
@@ -558,12 +572,16 @@ int virtio_crypto_ablkcipher_crypt_req(
return 0;
}
-static void virtio_crypto_ablkcipher_finalize_req(
+static void virtio_crypto_skcipher_finalize_req(
struct virtio_crypto_sym_request *vc_sym_req,
- struct ablkcipher_request *req,
+ struct skcipher_request *req,
int err)
{
- crypto_finalize_ablkcipher_request(vc_sym_req->base.dataq->engine,
+ if (vc_sym_req->encrypt)
+ scatterwalk_map_and_copy(req->iv, req->dst,
+ req->cryptlen - AES_BLOCK_SIZE,
+ AES_BLOCK_SIZE, 0);
+ crypto_finalize_skcipher_request(vc_sym_req->base.dataq->engine,
req, err);
kzfree(vc_sym_req->iv);
virtcrypto_clear_request(&vc_sym_req->base);
@@ -573,27 +591,21 @@ static struct virtio_crypto_algo virtio_crypto_algs[] = { {
.algonum = VIRTIO_CRYPTO_CIPHER_AES_CBC,
.service = VIRTIO_CRYPTO_SERVICE_CIPHER,
.algo = {
- .cra_name = "cbc(aes)",
- .cra_driver_name = "virtio_crypto_aes_cbc",
- .cra_priority = 150,
- .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
- .cra_blocksize = AES_BLOCK_SIZE,
- .cra_ctxsize = sizeof(struct virtio_crypto_ablkcipher_ctx),
- .cra_alignmask = 0,
- .cra_module = THIS_MODULE,
- .cra_type = &crypto_ablkcipher_type,
- .cra_init = virtio_crypto_ablkcipher_init,
- .cra_exit = virtio_crypto_ablkcipher_exit,
- .cra_u = {
- .ablkcipher = {
- .setkey = virtio_crypto_ablkcipher_setkey,
- .decrypt = virtio_crypto_ablkcipher_decrypt,
- .encrypt = virtio_crypto_ablkcipher_encrypt,
- .min_keysize = AES_MIN_KEY_SIZE,
- .max_keysize = AES_MAX_KEY_SIZE,
- .ivsize = AES_BLOCK_SIZE,
- },
- },
+ .base.cra_name = "cbc(aes)",
+ .base.cra_driver_name = "virtio_crypto_aes_cbc",
+ .base.cra_priority = 150,
+ .base.cra_flags = CRYPTO_ALG_ASYNC,
+ .base.cra_blocksize = AES_BLOCK_SIZE,
+ .base.cra_ctxsize = sizeof(struct virtio_crypto_skcipher_ctx),
+ .base.cra_module = THIS_MODULE,
+ .init = virtio_crypto_skcipher_init,
+ .exit = virtio_crypto_skcipher_exit,
+ .setkey = virtio_crypto_skcipher_setkey,
+ .decrypt = virtio_crypto_skcipher_decrypt,
+ .encrypt = virtio_crypto_skcipher_encrypt,
+ .min_keysize = AES_MIN_KEY_SIZE,
+ .max_keysize = AES_MAX_KEY_SIZE,
+ .ivsize = AES_BLOCK_SIZE,
},
} };
@@ -613,14 +625,14 @@ int virtio_crypto_algs_register(struct virtio_crypto *vcrypto)
continue;
if (virtio_crypto_algs[i].active_devs == 0) {
- ret = crypto_register_alg(&virtio_crypto_algs[i].algo);
+ ret = crypto_register_skcipher(&virtio_crypto_algs[i].algo);
if (ret)
goto unlock;
}
virtio_crypto_algs[i].active_devs++;
dev_info(&vcrypto->vdev->dev, "Registered algo %s\n",
- virtio_crypto_algs[i].algo.cra_name);
+ virtio_crypto_algs[i].algo.base.cra_name);
}
unlock:
@@ -644,7 +656,7 @@ void virtio_crypto_algs_unregister(struct virtio_crypto *vcrypto)
continue;
if (virtio_crypto_algs[i].active_devs == 1)
- crypto_unregister_alg(&virtio_crypto_algs[i].algo);
+ crypto_unregister_skcipher(&virtio_crypto_algs[i].algo);
virtio_crypto_algs[i].active_devs--;
}
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