Realize the symmetric algorithm control queue handler,
including plain cipher and chainning algorithms.
Currently the control queue is used to create and
close session for symmetric algorithm.
Signed-off-by: Gonglei <arei.gong...@huawei.com>
---
hw/virtio/virtio-crypto.c | 285 +++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 284 insertions(+), 1 deletion(-)
diff --git a/hw/virtio/virtio-crypto.c b/hw/virtio/virtio-crypto.c
index e2bc90e..98a7d60 100644
--- a/hw/virtio/virtio-crypto.c
+++ b/hw/virtio/virtio-crypto.c
@@ -23,6 +23,289 @@
#define VIRTIO_CRYPTO_VM_VERSION 1
+/*
+ * Transfer virtqueue index to crypto queue index.
+ * The control virtqueue is after the data virtqueues
+ * so the input value doesn't need to be adjusted
+ */
+static inline int virtio_crypto_vq2q(int queue_index)
+{
+ return queue_index;
+}
+
+static int
+virtio_crypto_cipher_session_helper(VirtIODevice *vdev,
+ CryptoDevBackendSymSessionInfo *info,
+ struct virtio_crypto_cipher_session_para *cipher_para,
+ struct iovec **iov, unsigned int *out_num)
+{
+ unsigned int num = *out_num;
+
+ info->cipher_alg = virtio_ldl_p(vdev, &cipher_para->algo);
+ info->key_len = virtio_ldl_p(vdev, &cipher_para->keylen);
+ info->direction = virtio_ldl_p(vdev, &cipher_para->op);
+ DPRINTF("cipher_alg=%" PRIu32 ", info->direction=%" PRIu32 "\n",
+ info->cipher_alg, info->direction);
+ /* Get cipher key */
+ if (info->key_len > 0) {
+ size_t s;
+ DPRINTF("keylen=%" PRIu32 "\n", info->key_len);
+
+ info->cipher_key = g_malloc(info->key_len);
+ s = iov_to_buf(*iov, num, 0, info->cipher_key, info->key_len);
+ if (unlikely(s != info->key_len)) {
+ virtio_error(vdev, "virtio-crypto cipher key incorrect");
+ return -EFAULT;
+ }
+ iov_discard_front(iov, &num, info->key_len);
+ *out_num = num;
+ }
+
+ return 0;
+}
+
+static int64_t
+virtio_crypto_create_sym_session(VirtIOCrypto *vcrypto,
+ struct virtio_crypto_sym_create_session_req *sess_req,
+ uint32_t queue_id,
+ uint32_t opcode,
+ struct iovec *iov, unsigned int out_num)
+{
+ VirtIODevice *vdev = VIRTIO_DEVICE(vcrypto);
+ CryptoDevBackendSymSessionInfo info;
+ int64_t session_id;
+ int queue_index;
+ uint32_t op_type;
+ Error *local_err = NULL;
+ int ret;
+
+ memset(&info, 0, sizeof(info));
+ op_type = virtio_ldl_p(vdev, &sess_req->op_type);
+ info.op_type = op_type;
+ info.op_code = opcode;
+
+ if (op_type == VIRTIO_CRYPTO_SYM_OP_CIPHER) {
+ ret = virtio_crypto_cipher_session_helper(vdev, &info,
+ &sess_req->u.cipher.para,
+ &iov, &out_num);
+ if (ret < 0) {
+ return -EFAULT;
+ }
+ } else if (op_type == VIRTIO_CRYPTO_SYM_OP_ALGORITHM_CHAINING) {
+ size_t s;
+ /* cipher part */
+ ret = virtio_crypto_cipher_session_helper(vdev, &info,
+ &sess_req->u.chain.para.cipher_param,
+ &iov, &out_num);
+ if (ret < 0) {
+ return -EFAULT;
+ }
+ /* hash part */
+ info.alg_chain_order = virtio_ldl_p(vdev,
+
&sess_req->u.chain.para.alg_chain_order);
+ info.add_len = virtio_ldl_p(vdev, &sess_req->u.chain.para.aad_len);
+ info.hash_mode = virtio_ldl_p(vdev, &sess_req->u.chain.para.hash_mode);
+ if (info.hash_mode == VIRTIO_CRYPTO_SYM_HASH_MODE_AUTH) {
+ info.hash_alg = virtio_ldl_p(vdev,
+ &sess_req->u.chain.para.u.mac_param.algo);
+ info.auth_key_len = virtio_ldl_p(vdev,
+ &sess_req->u.chain.para.u.mac_param.auth_key_len);
+ info.hash_result_len = virtio_ldl_p(vdev,
+
&sess_req->u.chain.para.u.mac_param.hash_result_len);
+ /* get auth key */
+ if (info.auth_key_len > 0) {
+ DPRINTF("auth_keylen=%" PRIu32 "\n", info.auth_key_len);
+ info.auth_key = g_malloc(info.auth_key_len);
+ s = iov_to_buf(iov, out_num, 0, info.auth_key,
+ info.auth_key_len);
+ if (unlikely(s != info.auth_key_len)) {
+ virtio_error(vdev,
+ "virtio-crypto authenticated key incorrect");
+ ret = -EFAULT;
+ goto err;
+ }
+ iov_discard_front(&iov, &out_num, info.auth_key_len);
+ }
+ } else if (info.hash_mode == VIRTIO_CRYPTO_SYM_HASH_MODE_PLAIN) {
+ info.hash_alg = virtio_ldl_p(vdev,
+ &sess_req->u.chain.para.u.hash_param.algo);
+ info.hash_result_len = virtio_ldl_p(vdev,
+ &sess_req->u.chain.para.u.hash_param.hash_result_len);
+ } else {
+ /* VIRTIO_CRYPTO_SYM_HASH_MODE_NESTED */
+ error_report("unsupported hash mode");
+ ret = -VIRTIO_CRYPTO_NOTSUPP;
+ goto err;
+ }
+ } else {
+ /* VIRTIO_CRYPTO_SYM_OP_NONE */
+ error_report("unsupported cipher op_type: VIRTIO_CRYPTO_SYM_OP_NONE");
+ ret = -VIRTIO_CRYPTO_NOTSUPP;
+ goto err;
+ }
+
+ queue_index = virtio_crypto_vq2q(queue_id);
+ session_id = cryptodev_backend_sym_create_session(
+ vcrypto->cryptodev,
+ &info, queue_index, &local_err);
+ if (session_id >= 0) {
+ DPRINTF("create session_id=%" PRIu64 " successfully\n",
+ session_id);
+
+ ret = session_id;
+ } else {
+ if (local_err) {
+ error_report_err(local_err);
+ }
+ ret = -VIRTIO_CRYPTO_ERR;
+ }
+
+err:
+ g_free(info.cipher_key);
+ g_free(info.auth_key);
+ return ret;
+}
+
+static uint32_t
+virtio_crypto_handle_close_session(VirtIOCrypto *vcrypto,
+ struct virtio_crypto_destroy_session_req *close_sess_req,
+ uint32_t queue_id)
+{
+ VirtIODevice *vdev = VIRTIO_DEVICE(vcrypto);
+ int ret;
+ uint64_t session_id;
+ uint32_t status;
+ Error *local_err = NULL;
+
+ session_id = virtio_ldq_p(vdev, &close_sess_req->session_id);
+ DPRINTF("close session, id=%" PRIu64 "\n", session_id);
+
+ ret = cryptodev_backend_sym_close_session(
+ vcrypto->cryptodev, session_id, queue_id, &local_err);
+ if (ret == 0) {
+ status = VIRTIO_CRYPTO_OK;
+ } else {
+ if (local_err) {
+ error_report_err(local_err);
+ } else {
+ error_report("destroy session failed");
+ }
+ status = VIRTIO_CRYPTO_ERR;
+ }
+
+ return status;
+}
+
+static void virtio_crypto_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq)
+{
+ VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(vdev);
+ struct virtio_crypto_op_ctrl_req ctrl;
+ VirtQueueElement *elem;
+ size_t in_len;
+ struct iovec *in_iov;
+ struct iovec *out_iov;
+ unsigned in_num;
+ unsigned out_num;
+ uint32_t queue_id;
+ uint32_t opcode;
+ struct virtio_crypto_session_input *input;
+ int64_t session_id;
+ uint32_t status;
+ size_t s;
+
+ for (;;) {
+ elem = virtqueue_pop(vq, sizeof(VirtQueueElement));
+ if (!elem) {
+ break;
+ }
+ if (elem->out_num < 1 || elem->in_num < 1) {
+ virtio_error(vdev, "virtio-crypto ctrl missing headers");
+ virtqueue_detach_element(vq, elem, 0);
+ g_free(elem);
+ break;
+ }
+
+ out_num = elem->out_num;
+ out_iov = elem->out_sg;
+ in_num = elem->in_num;
+ in_iov = elem->in_sg;
+ if (unlikely(iov_to_buf(out_iov, out_num, 0, &ctrl, sizeof(ctrl))
+ != sizeof(ctrl))) {
+ virtio_error(vdev, "virtio-crypto request ctrl_hdr too short");
+ virtqueue_detach_element(vq, elem, 0);
+ g_free(elem);
+ break;
+ }
+ iov_discard_front(&out_iov, &out_num, sizeof(ctrl));
+
+ opcode = virtio_ldl_p(vdev, &ctrl.header.opcode);
+ queue_id = virtio_ldl_p(vdev, &ctrl.header.queue_id);
+
+ switch (opcode) {
+ case VIRTIO_CRYPTO_CIPHER_CREATE_SESSION:
+ in_len = iov_size(in_iov, in_num);
+ input = (void *)in_iov[in_num - 1].iov_base
+ + in_iov[in_num - 1].iov_len
+ - sizeof(*input);
+ iov_discard_back(in_iov, &in_num, sizeof(*input));
+
+ session_id = virtio_crypto_create_sym_session(vcrypto,
+ &ctrl.u.sym_create_session,
+ queue_id, opcode,
+ out_iov, out_num);
+ /* Serious errors, need to reset virtio crypto device */
+ if (session_id == -EFAULT) {
+ virtqueue_detach_element(vq, elem, 0);
+ break;
+ } else if (session_id == -VIRTIO_CRYPTO_NOTSUPP) {
+ input->status = VIRTIO_CRYPTO_NOTSUPP;
+ } else if (session_id == -VIRTIO_CRYPTO_ERR) {
+ input->status = VIRTIO_CRYPTO_ERR;
+ } else {
+ input->session_id = session_id;
+ input->status = VIRTIO_CRYPTO_OK;
+ }
+
+ virtqueue_push(vq, elem, in_len);
+ virtio_notify(vdev, vq);
+ break;
+ case VIRTIO_CRYPTO_CIPHER_DESTROY_SESSION:
+ case VIRTIO_CRYPTO_HASH_DESTROY_SESSION:
+ case VIRTIO_CRYPTO_MAC_DESTROY_SESSION:
+ case VIRTIO_CRYPTO_AEAD_DESTROY_SESSION:
+ status = virtio_crypto_handle_close_session(vcrypto,
+ &ctrl.u.destroy_session, queue_id);
+
+ s = iov_from_buf(in_iov, in_num, 0, &status, sizeof(status));
+ if (unlikely(s != sizeof(status))) {
+ virtio_error(vdev, "virtio-crypto status incorrect");
+ virtqueue_detach_element(vq, elem, 0);
+ break;
+ }
+ virtqueue_push(vq, elem, sizeof(status));
+ virtio_notify(vdev, vq);
+ break;
+ case VIRTIO_CRYPTO_HASH_CREATE_SESSION:
+ case VIRTIO_CRYPTO_MAC_CREATE_SESSION:
+ case VIRTIO_CRYPTO_AEAD_CREATE_SESSION:
+ default:
+ in_len = iov_size(in_iov, in_num);
+ input = (void *)in_iov[in_num - 1].iov_base
+ + in_iov[in_num - 1].iov_len
+ - sizeof(*input);
+ error_report("virtio-crypto unsupported ctrl opcode: %d", opcode);
+
+ input->status = VIRTIO_CRYPTO_NOTSUPP;
+ virtqueue_push(vq, elem, in_len);
+ virtio_notify(vdev, vq);
+
+ break;
+ } /* end switch case */
+
+ g_free(elem);
+ } /* end for loop */
+}
+
static uint64_t virtio_crypto_get_features(VirtIODevice *vdev,
uint64_t features,
Error **errp)
@@ -85,7 +368,7 @@ static void virtio_crypto_device_realize(DeviceState *dev,
Error **errp)
virtio_add_queue(vdev, 1024, NULL);
}
- vcrypto->ctrl_vq = virtio_add_queue(vdev, 64, NULL);
+ vcrypto->ctrl_vq = virtio_add_queue(vdev, 64, virtio_crypto_handle_ctrl);
if (!vcrypto->cryptodev->ready) {
vcrypto->status &= ~VIRTIO_CRYPTO_S_HW_READY;
} else {
--
1.7.12.4
