Merge remote-tracking branch 'remotes/philmd/tags/integration-testing-20210927' into...
[qemu.git] / crypto / tls-cipher-suites.c
1 /*
2 * QEMU TLS Cipher Suites
3 *
4 * Copyright (c) 2018-2020 Red Hat, Inc.
5 *
6 * Author: Philippe Mathieu-Daudé <philmd@redhat.com>
7 *
8 * SPDX-License-Identifier: GPL-2.0-or-later
9 */
10
11 #include "qemu/osdep.h"
12 #include "qapi/error.h"
13 #include "qom/object_interfaces.h"
14 #include "crypto/tlscreds.h"
15 #include "crypto/tls-cipher-suites.h"
16 #include "hw/nvram/fw_cfg.h"
17 #include "tlscredspriv.h"
18 #include "trace.h"
19
20 struct QCryptoTLSCipherSuites {
21 /* <private> */
22 QCryptoTLSCreds parent_obj;
23 /* <public> */
24 };
25
26 /*
27 * IANA registered TLS ciphers:
28 * https://www.iana.org/assignments/tls-parameters/tls-parameters.xhtml#tls-parameters-4
29 */
30 typedef struct {
31 uint8_t data[2];
32 } QEMU_PACKED IANA_TLS_CIPHER;
33
34 GByteArray *qcrypto_tls_cipher_suites_get_data(QCryptoTLSCipherSuites *obj,
35 Error **errp)
36 {
37 QCryptoTLSCreds *creds = QCRYPTO_TLS_CREDS(obj);
38 gnutls_priority_t pcache;
39 GByteArray *byte_array;
40 const char *err;
41 size_t i;
42 int ret;
43
44 trace_qcrypto_tls_cipher_suite_priority(creds->priority);
45 ret = gnutls_priority_init(&pcache, creds->priority, &err);
46 if (ret < 0) {
47 error_setg(errp, "Syntax error using priority '%s': %s",
48 creds->priority, gnutls_strerror(ret));
49 return NULL;
50 }
51
52 byte_array = g_byte_array_new();
53
54 for (i = 0;; i++) {
55 int ret;
56 unsigned idx;
57 const char *name;
58 IANA_TLS_CIPHER cipher;
59 gnutls_protocol_t protocol;
60 const char *version;
61
62 ret = gnutls_priority_get_cipher_suite_index(pcache, i, &idx);
63 if (ret == GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE) {
64 break;
65 }
66 if (ret == GNUTLS_E_UNKNOWN_CIPHER_SUITE) {
67 continue;
68 }
69
70 name = gnutls_cipher_suite_info(idx, (unsigned char *)&cipher,
71 NULL, NULL, NULL, &protocol);
72 if (name == NULL) {
73 continue;
74 }
75
76 version = gnutls_protocol_get_name(protocol);
77 g_byte_array_append(byte_array, cipher.data, 2);
78 trace_qcrypto_tls_cipher_suite_info(cipher.data[0],
79 cipher.data[1],
80 version, name);
81 }
82 trace_qcrypto_tls_cipher_suite_count(byte_array->len);
83 gnutls_priority_deinit(pcache);
84
85 return byte_array;
86 }
87
88 static void qcrypto_tls_cipher_suites_complete(UserCreatable *uc,
89 Error **errp)
90 {
91 QCryptoTLSCreds *creds = QCRYPTO_TLS_CREDS(uc);
92
93 if (!creds->priority) {
94 error_setg(errp, "'priority' property is not set");
95 return;
96 }
97 }
98
99 static GByteArray *qcrypto_tls_cipher_suites_fw_cfg_gen_data(Object *obj,
100 Error **errp)
101 {
102 return qcrypto_tls_cipher_suites_get_data(QCRYPTO_TLS_CIPHER_SUITES(obj),
103 errp);
104 }
105
106 static void qcrypto_tls_cipher_suites_class_init(ObjectClass *oc, void *data)
107 {
108 UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc);
109 FWCfgDataGeneratorClass *fwgc = FW_CFG_DATA_GENERATOR_CLASS(oc);
110
111 ucc->complete = qcrypto_tls_cipher_suites_complete;
112 fwgc->get_data = qcrypto_tls_cipher_suites_fw_cfg_gen_data;
113 }
114
115 static const TypeInfo qcrypto_tls_cipher_suites_info = {
116 .parent = TYPE_QCRYPTO_TLS_CREDS,
117 .name = TYPE_QCRYPTO_TLS_CIPHER_SUITES,
118 .instance_size = sizeof(QCryptoTLSCipherSuites),
119 .class_size = sizeof(QCryptoTLSCredsClass),
120 .class_init = qcrypto_tls_cipher_suites_class_init,
121 .interfaces = (InterfaceInfo[]) {
122 { TYPE_USER_CREATABLE },
123 { TYPE_FW_CFG_DATA_GENERATOR_INTERFACE },
124 { }
125 }
126 };
127
128 static void qcrypto_tls_cipher_suites_register_types(void)
129 {
130 type_register_static(&qcrypto_tls_cipher_suites_info);
131 }
132
133 type_init(qcrypto_tls_cipher_suites_register_types);