1 files changed, 129 insertions, 0 deletions
diff --git a/src/openvpn/pkcs11_mbedtls.c b/src/openvpn/pkcs11_mbedtls.c
new file mode 100644
index 0000000..e208b61
--- /dev/null
+++ b/src/openvpn/pkcs11_mbedtls.c
@@ -0,0 +1,129 @@
+/*
+ *  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) 2002-2010 OpenVPN Technologies, Inc. <sales@openvpn.net>
+ *  Copyright (C) 2010 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) */