diff options
Diffstat (limited to 'drivers/crypto/virtio/virtio_crypto_algs.c')
| -rw-r--r-- | drivers/crypto/virtio/virtio_crypto_algs.c | 109 |
1 files changed, 87 insertions, 22 deletions
diff --git a/drivers/crypto/virtio/virtio_crypto_algs.c b/drivers/crypto/virtio/virtio_crypto_algs.c index 49defda4e03d..5035b0dc1e40 100644 --- a/drivers/crypto/virtio/virtio_crypto_algs.c +++ b/drivers/crypto/virtio/virtio_crypto_algs.c @@ -27,12 +27,68 @@ #include <uapi/linux/virtio_crypto.h> #include "virtio_crypto_common.h" + +struct virtio_crypto_ablkcipher_ctx { + struct virtio_crypto *vcrypto; + struct crypto_tfm *tfm; + + struct virtio_crypto_sym_session_info enc_sess_info; + struct virtio_crypto_sym_session_info dec_sess_info; +}; + +struct virtio_crypto_sym_request { + struct virtio_crypto_request base; + + /* Cipher or aead */ + uint32_t type; + struct virtio_crypto_ablkcipher_ctx *ablkcipher_ctx; + struct ablkcipher_request *ablkcipher_req; + uint8_t *iv; + /* Encryption? */ + bool encrypt; +}; + /* * The algs_lock protects the below global virtio_crypto_active_devs * and crypto algorithms registion. */ static DEFINE_MUTEX(algs_lock); static unsigned int virtio_crypto_active_devs; +static void virtio_crypto_ablkcipher_finalize_req( + struct virtio_crypto_sym_request *vc_sym_req, + struct ablkcipher_request *req, + int err); + +static void virtio_crypto_dataq_sym_callback + (struct virtio_crypto_request *vc_req, int len) +{ + struct virtio_crypto_sym_request *vc_sym_req = + container_of(vc_req, struct virtio_crypto_sym_request, base); + struct ablkcipher_request *ablk_req; + int error; + + /* Finish the encrypt or decrypt process */ + if (vc_sym_req->type == VIRTIO_CRYPTO_SYM_OP_CIPHER) { + switch (vc_req->status) { + case VIRTIO_CRYPTO_OK: + error = 0; + break; + case VIRTIO_CRYPTO_INVSESS: + case VIRTIO_CRYPTO_ERR: + error = -EINVAL; + break; + case VIRTIO_CRYPTO_BADMSG: + error = -EBADMSG; + break; + default: + error = -EIO; + break; + } + ablk_req = vc_sym_req->ablkcipher_req; + virtio_crypto_ablkcipher_finalize_req(vc_sym_req, + ablk_req, error); + } +} static u64 virtio_crypto_alg_sg_nents_length(struct scatterlist *sg) { @@ -286,13 +342,14 @@ static int virtio_crypto_ablkcipher_setkey(struct crypto_ablkcipher *tfm, } static int -__virtio_crypto_ablkcipher_do_req(struct virtio_crypto_request *vc_req, +__virtio_crypto_ablkcipher_do_req(struct virtio_crypto_sym_request *vc_sym_req, struct ablkcipher_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 virtio_crypto_request *vc_req = &vc_sym_req->base; unsigned int ivsize = crypto_ablkcipher_ivsize(tfm); - struct virtio_crypto_ablkcipher_ctx *ctx = vc_req->ablkcipher_ctx; struct virtio_crypto *vcrypto = ctx->vcrypto; struct virtio_crypto_op_data_req *req_data; int src_nents, dst_nents; @@ -326,9 +383,9 @@ __virtio_crypto_ablkcipher_do_req(struct virtio_crypto_request *vc_req, } vc_req->req_data = req_data; - vc_req->type = VIRTIO_CRYPTO_SYM_OP_CIPHER; + vc_sym_req->type = VIRTIO_CRYPTO_SYM_OP_CIPHER; /* Head of operation */ - if (vc_req->encrypt) { + if (vc_sym_req->encrypt) { req_data->header.session_id = cpu_to_le64(ctx->enc_sess_info.session_id); req_data->header.opcode = @@ -383,7 +440,7 @@ __virtio_crypto_ablkcipher_do_req(struct virtio_crypto_request *vc_req, memcpy(iv, req->info, ivsize); sg_init_one(&iv_sg, iv, ivsize); sgs[num_out++] = &iv_sg; - vc_req->iv = iv; + vc_sym_req->iv = iv; /* Source data */ for (i = 0; i < src_nents; i++) @@ -421,15 +478,18 @@ static int virtio_crypto_ablkcipher_encrypt(struct ablkcipher_request *req) { struct crypto_ablkcipher *atfm = crypto_ablkcipher_reqtfm(req); struct virtio_crypto_ablkcipher_ctx *ctx = crypto_ablkcipher_ctx(atfm); - struct virtio_crypto_request *vc_req = ablkcipher_request_ctx(req); + struct virtio_crypto_sym_request *vc_sym_req = + ablkcipher_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]; - vc_req->ablkcipher_ctx = ctx; - vc_req->ablkcipher_req = req; - vc_req->encrypt = true; 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->encrypt = true; return crypto_transfer_cipher_request_to_engine(data_vq->engine, req); } @@ -438,16 +498,18 @@ static int virtio_crypto_ablkcipher_decrypt(struct ablkcipher_request *req) { struct crypto_ablkcipher *atfm = crypto_ablkcipher_reqtfm(req); struct virtio_crypto_ablkcipher_ctx *ctx = crypto_ablkcipher_ctx(atfm); - struct virtio_crypto_request *vc_req = ablkcipher_request_ctx(req); + struct virtio_crypto_sym_request *vc_sym_req = + ablkcipher_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]; - vc_req->ablkcipher_ctx = ctx; - vc_req->ablkcipher_req = req; - - vc_req->encrypt = false; 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->encrypt = false; return crypto_transfer_cipher_request_to_engine(data_vq->engine, req); } @@ -456,7 +518,7 @@ static int virtio_crypto_ablkcipher_init(struct crypto_tfm *tfm) { struct virtio_crypto_ablkcipher_ctx *ctx = crypto_tfm_ctx(tfm); - tfm->crt_ablkcipher.reqsize = sizeof(struct virtio_crypto_request); + tfm->crt_ablkcipher.reqsize = sizeof(struct virtio_crypto_sym_request); ctx->tfm = tfm; return 0; @@ -479,11 +541,13 @@ int virtio_crypto_ablkcipher_crypt_req( struct crypto_engine *engine, struct ablkcipher_request *req) { - struct virtio_crypto_request *vc_req = ablkcipher_request_ctx(req); + struct virtio_crypto_sym_request *vc_sym_req = + ablkcipher_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_req, req, data_vq); + ret = __virtio_crypto_ablkcipher_do_req(vc_sym_req, req, data_vq); if (ret < 0) return ret; @@ -492,14 +556,15 @@ int virtio_crypto_ablkcipher_crypt_req( return 0; } -void virtio_crypto_ablkcipher_finalize_req( - struct virtio_crypto_request *vc_req, +static void virtio_crypto_ablkcipher_finalize_req( + struct virtio_crypto_sym_request *vc_sym_req, struct ablkcipher_request *req, int err) { - crypto_finalize_cipher_request(vc_req->dataq->engine, req, err); - - virtcrypto_clear_request(vc_req); + crypto_finalize_cipher_request(vc_sym_req->base.dataq->engine, + req, err); + kzfree(vc_sym_req->iv); + virtcrypto_clear_request(&vc_sym_req->base); } static struct crypto_alg virtio_crypto_algs[] = { { |