qxl: check release info object
[qemu.git] / crypto / afalg.c
1 /*
2 * QEMU Crypto af_alg support
3 *
4 * Copyright (c) 2017 HUAWEI TECHNOLOGIES CO., LTD.
5 *
6 * Authors:
7 * Longpeng(Mike) <longpeng2@huawei.com>
8 *
9 * This work is licensed under the terms of the GNU GPL, version 2 or
10 * (at your option) any later version. See the COPYING file in the
11 * top-level directory.
12 */
13 #include "qemu/osdep.h"
14 #include "qemu/cutils.h"
15 #include "qemu/sockets.h"
16 #include "qapi/error.h"
17 #include "afalgpriv.h"
18
19 static bool
20 qcrypto_afalg_build_saddr(const char *type, const char *name,
21 struct sockaddr_alg *salg, Error **errp)
22 {
23 salg->salg_family = AF_ALG;
24
25 if (strnlen(type, SALG_TYPE_LEN_MAX) >= SALG_TYPE_LEN_MAX) {
26 error_setg(errp, "Afalg type(%s) is larger than %d bytes",
27 type, SALG_TYPE_LEN_MAX);
28 return false;
29 }
30
31 if (strnlen(name, SALG_NAME_LEN_MAX) >= SALG_NAME_LEN_MAX) {
32 error_setg(errp, "Afalg name(%s) is larger than %d bytes",
33 name, SALG_NAME_LEN_MAX);
34 return false;
35 }
36
37 pstrcpy((char *)salg->salg_type, SALG_TYPE_LEN_MAX, type);
38 pstrcpy((char *)salg->salg_name, SALG_NAME_LEN_MAX, name);
39
40 return true;
41 }
42
43 static int
44 qcrypto_afalg_socket_bind(const char *type, const char *name,
45 Error **errp)
46 {
47 int sbind;
48 struct sockaddr_alg salg = {0};
49
50 if (!qcrypto_afalg_build_saddr(type, name, &salg, errp)) {
51 return -1;
52 }
53
54 sbind = qemu_socket(AF_ALG, SOCK_SEQPACKET, 0);
55 if (sbind < 0) {
56 error_setg_errno(errp, errno, "Failed to create socket");
57 return -1;
58 }
59
60 if (bind(sbind, (const struct sockaddr *)&salg, sizeof(salg)) != 0) {
61 error_setg_errno(errp, errno, "Failed to bind socket");
62 closesocket(sbind);
63 return -1;
64 }
65
66 return sbind;
67 }
68
69 QCryptoAFAlg *
70 qcrypto_afalg_comm_alloc(const char *type, const char *name,
71 Error **errp)
72 {
73 QCryptoAFAlg *afalg;
74
75 afalg = g_new0(QCryptoAFAlg, 1);
76 /* initilize crypto API socket */
77 afalg->opfd = -1;
78 afalg->tfmfd = qcrypto_afalg_socket_bind(type, name, errp);
79 if (afalg->tfmfd == -1) {
80 goto error;
81 }
82
83 afalg->opfd = qemu_accept(afalg->tfmfd, NULL, 0);
84 if (afalg->opfd == -1) {
85 error_setg_errno(errp, errno, "Failed to accept socket");
86 goto error;
87 }
88
89 return afalg;
90
91 error:
92 qcrypto_afalg_comm_free(afalg);
93 return NULL;
94 }
95
96 void qcrypto_afalg_comm_free(QCryptoAFAlg *afalg)
97 {
98 if (!afalg) {
99 return;
100 }
101
102 if (afalg->msg) {
103 g_free(afalg->msg->msg_control);
104 g_free(afalg->msg);
105 }
106
107 if (afalg->tfmfd != -1) {
108 closesocket(afalg->tfmfd);
109 }
110
111 if (afalg->opfd != -1) {
112 closesocket(afalg->opfd);
113 }
114
115 g_free(afalg);
116 }