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/*
* 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) 2002-2017 OpenVPN Technologies, Inc. <sales@openvpn.net>
* Copyright (C) 2010-2017 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 (see the file COPYING included with this
* distribution); if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 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 <mbedtls/pkcs11.h>
#include <mbedtls/x509.h>
int
pkcs11_init_tls_session(pkcs11h_certificate_t certificate,
struct tls_root_ctx *const ssl_ctx)
{
int ret = 1;
ASSERT(NULL != ssl_ctx);
ALLOC_OBJ_CLEAR(ssl_ctx->crt_chain, mbedtls_x509_crt);
if (mbedtls_pkcs11_x509_cert_bind(ssl_ctx->crt_chain, certificate))
{
msg(M_FATAL, "PKCS#11: Cannot retrieve mbed TLS certificate object");
goto cleanup;
}
ALLOC_OBJ_CLEAR(ssl_ctx->priv_key_pkcs11, mbedtls_pkcs11_context);
if (mbedtls_pkcs11_priv_key_bind(ssl_ctx->priv_key_pkcs11, certificate))
{
msg(M_FATAL, "PKCS#11: Cannot initialize mbed TLS private key object");
goto cleanup;
}
ALLOC_OBJ_CLEAR(ssl_ctx->priv_key, mbedtls_pk_context);
if (!mbed_ok(mbedtls_pk_setup_rsa_alt(ssl_ctx->priv_key,
ssl_ctx->priv_key_pkcs11, mbedtls_ssl_pkcs11_decrypt,
mbedtls_ssl_pkcs11_sign, mbedtls_ssl_pkcs11_key_len)))
{
goto cleanup;
}
ret = 0;
cleanup:
return ret;
}
char *
pkcs11_certificate_dn(pkcs11h_certificate_t cert, struct gc_arena *gc)
{
char *ret = NULL;
char dn[1024] = {0};
mbedtls_x509_crt mbed_crt = {0};
if (mbedtls_pkcs11_x509_cert_bind(&mbed_crt, cert))
{
msg(M_FATAL, "PKCS#11: Cannot retrieve mbed TLS certificate object");
goto cleanup;
}
if (-1 == mbedtls_x509_dn_gets(dn, sizeof(dn), &mbed_crt.subject))
{
msg(M_FATAL, "PKCS#11: mbed TLS cannot parse subject");
goto cleanup;
}
ret = string_alloc(dn, gc);
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 (mbedtls_pkcs11_x509_cert_bind(&mbed_crt, cert))
{
msg(M_FATAL, "PKCS#11: Cannot retrieve mbed TLS certificate object");
goto cleanup;
}
if (-1 == mbedtls_x509_serial_gets(serial, serial_len, &mbed_crt.serial))
{
msg(M_FATAL, "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) */
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