1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
|
/*************************************************************************/
/* ssl_context_mbedtls.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2019 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2019 Godot Engine contributors (cf. AUTHORS.md) */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#include "ssl_context_mbedtls.h"
static void my_debug(void *ctx, int level,
const char *file, int line,
const char *str) {
printf("%s:%04d: %s", file, line, str);
fflush(stdout);
}
Error SSLContextMbedTLS::_setup(int p_endpoint, int p_transport, int p_authmode) {
ERR_FAIL_COND_V_MSG(inited, ERR_ALREADY_IN_USE, "This SSL context is already active");
mbedtls_ssl_init(&ssl);
mbedtls_ssl_config_init(&conf);
mbedtls_ctr_drbg_init(&ctr_drbg);
mbedtls_entropy_init(&entropy);
inited = true;
int ret = mbedtls_ctr_drbg_seed(&ctr_drbg, mbedtls_entropy_func, &entropy, NULL, 0);
if (ret != 0) {
clear(); // Never leave unusable resources around.
ERR_FAIL_V_MSG(FAILED, "mbedtls_ctr_drbg_seed returned an error" + itos(ret));
}
ret = mbedtls_ssl_config_defaults(&conf, p_endpoint, p_transport, MBEDTLS_SSL_PRESET_DEFAULT);
if (ret != 0) {
clear();
ERR_FAIL_V_MSG(FAILED, "mbedtls_ssl_config_defaults returned an error" + itos(ret));
}
mbedtls_ssl_conf_authmode(&conf, p_authmode);
mbedtls_ssl_conf_rng(&conf, mbedtls_ctr_drbg_random, &ctr_drbg);
mbedtls_ssl_conf_dbg(&conf, my_debug, stdout);
return OK;
}
Error SSLContextMbedTLS::init_server(int p_transport, int p_authmode, Ref<CryptoKeyMbedTLS> p_pkey, Ref<X509CertificateMbedTLS> p_cert) {
ERR_FAIL_COND_V(!p_pkey.is_valid(), ERR_INVALID_PARAMETER);
ERR_FAIL_COND_V(!p_cert.is_valid(), ERR_INVALID_PARAMETER);
Error err = _setup(MBEDTLS_SSL_IS_SERVER, p_transport, p_authmode);
ERR_FAIL_COND_V(err != OK, err);
// Locking key and certificate(s)
pkey = p_pkey;
certs = p_cert;
if (pkey.is_valid())
pkey->lock();
if (certs.is_valid())
certs->lock();
// Adding key and certificate
int ret = mbedtls_ssl_conf_own_cert(&conf, &(certs->cert), &(pkey->pkey));
if (ret != 0) {
clear();
ERR_FAIL_V_MSG(ERR_INVALID_PARAMETER, "Invalid cert/key combination " + itos(ret));
}
// Adding CA chain if available.
if (certs->cert.next) {
mbedtls_ssl_conf_ca_chain(&conf, certs->cert.next, NULL);
}
mbedtls_ssl_setup(&ssl, &conf);
return OK;
}
Error SSLContextMbedTLS::init_client(int p_transport, int p_authmode, Ref<X509CertificateMbedTLS> p_valid_cas) {
Error err = _setup(MBEDTLS_SSL_IS_CLIENT, p_transport, p_authmode);
ERR_FAIL_COND_V(err != OK, err);
X509CertificateMbedTLS *cas = NULL;
if (p_valid_cas.is_valid()) {
// Locking CA certificates
certs = p_valid_cas;
certs->lock();
cas = certs.ptr();
} else {
// Fall back to default certificates (no need to lock those).
cas = CryptoMbedTLS::get_default_certificates();
if (cas == NULL) {
clear();
ERR_FAIL_V_MSG(ERR_UNCONFIGURED, "SSL module failed to initialize!");
}
}
// Set valid CAs
mbedtls_ssl_conf_ca_chain(&conf, &(cas->cert), NULL);
mbedtls_ssl_setup(&ssl, &conf);
return OK;
}
void SSLContextMbedTLS::clear() {
if (!inited)
return;
mbedtls_ssl_free(&ssl);
mbedtls_ssl_config_free(&conf);
mbedtls_ctr_drbg_free(&ctr_drbg);
mbedtls_entropy_free(&entropy);
// Unlock and key and certificates
if (certs.is_valid())
certs->unlock();
certs = Ref<X509Certificate>();
if (pkey.is_valid())
pkey->unlock();
pkey = Ref<CryptoKeyMbedTLS>();
inited = false;
}
mbedtls_ssl_context *SSLContextMbedTLS::get_context() {
ERR_FAIL_COND_V(!inited, NULL);
return &ssl;
}
SSLContextMbedTLS::SSLContextMbedTLS() {
inited = false;
}
SSLContextMbedTLS::~SSLContextMbedTLS() {
clear();
}
|