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
152
153
154
155
156
157
158
159
|
/*
* OpenVPN -- An application to securely tunnel IP networks
* over a single TCP/UDP port, with support for SSL/TLS-based
* session authentication and key exchange,
* packet encryption, packet authentication, and
* packet compression.
*
* Copyright (C) 2002-2018 OpenVPN Inc <sales@openvpn.net>
* Copyright (C) 2010-2018 Fox Crypto B.V. <openvpn@fox-it.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
/**
* @file PKCS #11 mbed TLS backend
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#elif defined(_MSC_VER)
#include "config-msvc.h"
#endif
#include "syshead.h"
#if defined(ENABLE_PKCS11) && defined(ENABLE_CRYPTO_MBEDTLS)
#include "errlevel.h"
#include "pkcs11_backend.h"
#include "ssl_verify_backend.h"
#include <mbedtls/x509.h>
static bool
pkcs11_get_x509_cert(pkcs11h_certificate_t pkcs11_cert, mbedtls_x509_crt *cert)
{
unsigned char *cert_blob = NULL;
size_t cert_blob_size = 0;
bool ret = false;
if (pkcs11h_certificate_getCertificateBlob(pkcs11_cert, NULL,
&cert_blob_size) != CKR_OK)
{
msg(M_WARN, "PKCS#11: Cannot retrieve certificate object size");
goto cleanup;
}
check_malloc_return((cert_blob = calloc(1, cert_blob_size)));
if (pkcs11h_certificate_getCertificateBlob(pkcs11_cert, cert_blob,
&cert_blob_size) != CKR_OK)
{
msg(M_WARN, "PKCS#11: Cannot retrieve certificate object");
goto cleanup;
}
if (!mbed_ok(mbedtls_x509_crt_parse(cert, cert_blob, cert_blob_size)))
{
msg(M_WARN, "PKCS#11: Could not parse certificate");
goto cleanup;
}
ret = true;
cleanup:
free(cert_blob);
return ret;
}
static bool
pkcs11_sign(void *pkcs11_cert, const void *src, size_t src_len,
void *dst, size_t dst_len)
{
return CKR_OK == pkcs11h_certificate_signAny(pkcs11_cert, CKM_RSA_PKCS,
src, src_len, dst, &dst_len);
}
int
pkcs11_init_tls_session(pkcs11h_certificate_t certificate,
struct tls_root_ctx *const ssl_ctx)
{
ASSERT(NULL != ssl_ctx);
ssl_ctx->pkcs11_cert = certificate;
ALLOC_OBJ_CLEAR(ssl_ctx->crt_chain, mbedtls_x509_crt);
if (!pkcs11_get_x509_cert(certificate, ssl_ctx->crt_chain))
{
msg(M_WARN, "PKCS#11: Cannot initialize certificate");
return 1;
}
if (tls_ctx_use_external_signing_func(ssl_ctx, pkcs11_sign, certificate))
{
msg(M_WARN, "PKCS#11: Cannot register signing function");
return 1;
}
return 0;
}
char *
pkcs11_certificate_dn(pkcs11h_certificate_t cert, struct gc_arena *gc)
{
char *ret = NULL;
mbedtls_x509_crt mbed_crt = { 0 };
if (!pkcs11_get_x509_cert(cert, &mbed_crt))
{
msg(M_WARN, "PKCS#11: Cannot retrieve mbed TLS certificate object");
goto cleanup;
}
if (!(ret = x509_get_subject(&mbed_crt, gc)))
{
msg(M_WARN, "PKCS#11: mbed TLS cannot parse subject");
goto cleanup;
}
cleanup:
mbedtls_x509_crt_free(&mbed_crt);
return ret;
}
int
pkcs11_certificate_serial(pkcs11h_certificate_t cert, char *serial,
size_t serial_len)
{
int ret = 1;
mbedtls_x509_crt mbed_crt = { 0 };
if (!pkcs11_get_x509_cert(cert, &mbed_crt))
{
msg(M_WARN, "PKCS#11: Cannot retrieve mbed TLS certificate object");
goto cleanup;
}
if (mbedtls_x509_serial_gets(serial, serial_len, &mbed_crt.serial) < 0)
{
msg(M_WARN, "PKCS#11: mbed TLS cannot parse serial");
goto cleanup;
}
ret = 0;
cleanup:
mbedtls_x509_crt_free(&mbed_crt);
return ret;
}
#endif /* defined(ENABLE_PKCS11) && defined(ENABLE_CRYPTO_MBEDTLS) */
|
