-----Original Message-----
From: zhenwei pi [mailto:pizhenwei@bytedance.com]
Sent: Tuesday, May 31, 2022 9:48 AM
To: Gonglei (Arei) <arei.gonglei@huawei.com>
Cc: qemu-devel@nongnu.org; mst@redhat.com;
virtualization@lists.linux-foundation.org; helei.sig11@bytedance.com;
berrange@redhat.com
Subject: Re: RE: [PATCH v8 1/1] crypto: Introduce RSA algorithm
On 5/30/22 21:31, Gonglei (Arei) wrote:
-----Original Message-----
From: zhenwei pi [mailto:pizhenwei@bytedance.com]
Sent: Friday, May 27, 2022 4:48 PM
To: mst@redhat.com; Gonglei (Arei) <arei.gonglei@huawei.com>
Cc: qemu-devel@nongnu.org; virtualization@lists.linux-foundation.org;
helei.sig11@bytedance.com; berrange@redhat.com; zhenwei pi
<pizhenwei@bytedance.com>
Subject: [PATCH v8 1/1] crypto: Introduce RSA algorithm
Skip...
+static int64_t
+virtio_crypto_create_asym_session(VirtIOCrypto *vcrypto,
+ struct virtio_crypto_akcipher_create_session_req
*sess_req,
+ uint32_t queue_id, uint32_t opcode,
+ struct iovec *iov, unsigned int out_num) {
+ VirtIODevice *vdev = VIRTIO_DEVICE(vcrypto);
+ CryptoDevBackendSessionInfo info = {0};
+ CryptoDevBackendAsymSessionInfo *asym_info;
+ int64_t session_id;
+ int queue_index;
+ uint32_t algo, keytype, keylen;
+ g_autofree uint8_t *key = NULL;
+ Error *local_err = NULL;
+
+ algo = ldl_le_p(&sess_req->para.algo);
+ keytype = ldl_le_p(&sess_req->para.keytype);
+ keylen = ldl_le_p(&sess_req->para.keylen);
+
+ if ((keytype != VIRTIO_CRYPTO_AKCIPHER_KEY_TYPE_PUBLIC)
+ && (keytype !=
VIRTIO_CRYPTO_AKCIPHER_KEY_TYPE_PRIVATE)) {
+ error_report("unsupported asym keytype: %d", keytype);
+ return -VIRTIO_CRYPTO_NOTSUPP;
+ }
+
+ if (keylen) {
+ key = g_malloc(keylen);
+ if (iov_to_buf(iov, out_num, 0, key, keylen) != keylen) {
+ virtio_error(vdev, "virtio-crypto asym key incorrect");
+ return -EFAULT;
Memory leak.
+ }
+ iov_discard_front(&iov, &out_num, keylen);
+ }
+
+ info.op_code = opcode;
+ asym_info = &info.u.asym_sess_info;
+ asym_info->algo = algo;
+ asym_info->keytype = keytype;
+ asym_info->keylen = keylen;
+ asym_info->key = key;
+ switch (asym_info->algo) {
+ case VIRTIO_CRYPTO_AKCIPHER_RSA:
+ asym_info->u.rsa.padding_algo =
+ ldl_le_p(&sess_req->para.u.rsa.padding_algo);
+ asym_info->u.rsa.hash_algo =
+ ldl_le_p(&sess_req->para.u.rsa.hash_algo);
+ break;
+
+ /* TODO DSA&ECDSA handling */
+
+ default:
+ return -VIRTIO_CRYPTO_ERR;
+ }
+
+ queue_index = virtio_crypto_vq2q(queue_id);
+ session_id =
+ cryptodev_backend_create_session(vcrypto->cryptodev,
&info,
+ queue_index, &local_err);
+ if (session_id < 0) {
+ if (local_err) {
+ error_report_err(local_err);
+ }
+ return -VIRTIO_CRYPTO_ERR;
+ }
+
+ return session_id;
Where to free the key at both normal and exceptional paths?
Hi, Lei
The key is declared with g_autofree:
g_autofree uint8_t *key = NULL;