Check overhead in DTLS.

2 files changed, 355 insertions, 1 deletions

diff --git a/tests/Makefile.am b/tests/Makefile.am
index ff72b1ed92..60c8251d9e 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -69,7 +69,7 @@ ctests = mini-deflate simple gc set_pkcs12_cred certder certuniqueid	\
 	 x509cert x509cert-tl infoaccess mini-dtls-hello-verify \
 	 mini-tdb mini-dtls-rehandshake mini-alpn \
 	 mini-termination mini-x509-cas mini-x509-2 pkcs12_simple \
-	 mini-emsgsize-dtls chainverify-unsorted \
+	 mini-emsgsize-dtls chainverify-unsorted mini-overhead \
 	 mini-dtls-heartbeat mini-x509-callbacks key-openssl		\
 	 mini-dtls-srtp mini-xssl rsa-encrypt-decrypt mini-loss-time \
 	 mini-record mini-dtls-record mini-handshake-timeout mini-record-range
diff --git a/tests/mini-overhead.c b/tests/mini-overhead.c
new file mode 100644
index 0000000000..a6e599ce4c
--- /dev/null
+++ b/tests/mini-overhead.c
@@ -0,0 +1,354 @@
+/*
+ * Copyright (C) 2012 Free Software Foundation, Inc.
+ *
+ * Author: Nikos Mavrogiannopoulos
+ *
+ * This file is part of GnuTLS.
+ *
+ * GnuTLS is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * GnuTLS 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 GnuTLS; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#if defined(_WIN32)
+
+int main()
+{
+  exit(77);
+}
+
+#else
+
+#include <string.h>
+#include <sys/types.h>
+#include <netinet/in.h>
+#include <sys/socket.h>
+#include <sys/wait.h>
+#include <arpa/inet.h>
+#include <unistd.h>
+#include <gnutls/gnutls.h>
+#include <gnutls/dtls.h>
+#include <signal.h>
+
+#include "utils.h"
+
+static void terminate(void);
+
+/* This program tests the robustness of record
+ * decoding.
+ */
+
+static void
+server_log_func (int level, const char *str)
+{
+//  fprintf (stderr, "server|<%d>| %s", level, str);
+}
+
+static void
+client_log_func (int level, const char *str)
+{
+  fprintf (stderr, "client|<%d>| %s", level, str);
+}
+
+static unsigned char server_cert_pem[] =
+  "-----BEGIN CERTIFICATE-----\n"
+  "MIICVjCCAcGgAwIBAgIERiYdMTALBgkqhkiG9w0BAQUwGTEXMBUGA1UEAxMOR251\n"
+  "VExTIHRlc3QgQ0EwHhcNMDcwNDE4MTMyOTIxWhcNMDgwNDE3MTMyOTIxWjA3MRsw\n"
+  "GQYDVQQKExJHbnVUTFMgdGVzdCBzZXJ2ZXIxGDAWBgNVBAMTD3Rlc3QuZ251dGxz\n"
+  "Lm9yZzCBnDALBgkqhkiG9w0BAQEDgYwAMIGIAoGA17pcr6MM8C6pJ1aqU46o63+B\n"
+  "dUxrmL5K6rce+EvDasTaDQC46kwTHzYWk95y78akXrJutsoKiFV1kJbtple8DDt2\n"
+  "DZcevensf9Op7PuFZKBroEjOd35znDET/z3IrqVgbtm2jFqab7a+n2q9p/CgMyf1\n"
+  "tx2S5Zacc1LWn9bIjrECAwEAAaOBkzCBkDAMBgNVHRMBAf8EAjAAMBoGA1UdEQQT\n"
+  "MBGCD3Rlc3QuZ251dGxzLm9yZzATBgNVHSUEDDAKBggrBgEFBQcDATAPBgNVHQ8B\n"
+  "Af8EBQMDB6AAMB0GA1UdDgQWBBTrx0Vu5fglyoyNgw106YbU3VW0dTAfBgNVHSME\n"
+  "GDAWgBTpPBz7rZJu5gakViyi4cBTJ8jylTALBgkqhkiG9w0BAQUDgYEAaFEPTt+7\n"
+  "bzvBuOf7+QmeQcn29kT6Bsyh1RHJXf8KTk5QRfwp6ogbp94JQWcNQ/S7YDFHglD1\n"
+  "AwUNBRXwd3riUsMnsxgeSDxYBfJYbDLeohNBsqaPDJb7XailWbMQKfAbFQ8cnOxg\n"
+  "rOKLUQRWJ0K3HyXRMhbqjdLIaQiCvQLuizo=\n" "-----END CERTIFICATE-----\n";
+
+const gnutls_datum_t server_cert = { server_cert_pem,
+  sizeof (server_cert_pem)
+};
+
+static unsigned char server_key_pem[] =
+  "-----BEGIN RSA PRIVATE KEY-----\n"
+  "MIICXAIBAAKBgQDXulyvowzwLqknVqpTjqjrf4F1TGuYvkrqtx74S8NqxNoNALjq\n"
+  "TBMfNhaT3nLvxqResm62ygqIVXWQlu2mV7wMO3YNlx696ex/06ns+4VkoGugSM53\n"
+  "fnOcMRP/PciupWBu2baMWppvtr6far2n8KAzJ/W3HZLllpxzUtaf1siOsQIDAQAB\n"
+  "AoGAYAFyKkAYC/PYF8e7+X+tsVCHXppp8AoP8TEZuUqOZz/AArVlle/ROrypg5kl\n"
+  "8YunrvUdzH9R/KZ7saNZlAPLjZyFG9beL/am6Ai7q7Ma5HMqjGU8kTEGwD7K+lbG\n"
+  "iomokKMOl+kkbY/2sI5Czmbm+/PqLXOjtVc5RAsdbgvtmvkCQQDdV5QuU8jap8Hs\n"
+  "Eodv/tLJ2z4+SKCV2k/7FXSKWe0vlrq0cl2qZfoTUYRnKRBcWxc9o92DxK44wgPi\n"
+  "oMQS+O7fAkEA+YG+K9e60sj1K4NYbMPAbYILbZxORDecvP8lcphvwkOVUqbmxOGh\n"
+  "XRmTZUuhBrJhJKKf6u7gf3KWlPl6ShKEbwJASC118cF6nurTjuLf7YKARDjNTEws\n"
+  "qZEeQbdWYINAmCMj0RH2P0mvybrsXSOD5UoDAyO7aWuqkHGcCLv6FGG+qwJAOVqq\n"
+  "tXdUucl6GjOKKw5geIvRRrQMhb/m5scb+5iw8A4LEEHPgGiBaF5NtJZLALgWfo5n\n"
+  "hmC8+G8F0F78znQtPwJBANexu+Tg5KfOnzSILJMo3oXiXhf5PqXIDmbN0BKyCKAQ\n"
+  "LfkcEcUbVfmDaHpvzwY9VEaoMOKVLitETXdNSxVpvWM=\n"
+  "-----END RSA PRIVATE KEY-----\n";
+
+const gnutls_datum_t server_key = { server_key_pem,
+  sizeof (server_key_pem)
+};
+
+
+/* A very basic TLS client, with anonymous authentication.
+ */
+
+#define MAX_BUF 1024
+#define MTU 1500
+
+static void
+client (int fd, const char* prio, unsigned overhead)
+{
+  int ret;
+  gnutls_anon_client_credentials_t anoncred;
+  gnutls_certificate_credentials_t x509_cred;
+  gnutls_session_t session;
+  /* Need to enable anonymous KX specifically. */
+
+  global_init ();
+
+  if (debug)
+    {
+      gnutls_global_set_log_function (client_log_func);
+      gnutls_global_set_log_level (7);
+    }
+
+  gnutls_anon_allocate_client_credentials (&anoncred);
+  gnutls_certificate_allocate_credentials (&x509_cred);
+
+  /* Initialize TLS session
+   */
+  gnutls_init (&session, GNUTLS_CLIENT|GNUTLS_DATAGRAM);
+
+  /* Use default priorities */
+  ret = gnutls_priority_set_direct (session, prio, NULL);
+  if (ret < 0)
+    {
+      fail("error in setting priority: %s\n", prio);
+      exit(1);
+    }
+
+  /* put the anonymous credentials to the current session
+   */
+  gnutls_credentials_set (session, GNUTLS_CRD_ANON, anoncred);
+  gnutls_credentials_set (session, GNUTLS_CRD_CERTIFICATE, x509_cred);
+
+  gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) fd);
+
+  /* Perform the TLS handshake
+   */
+  do 
+    {
+      ret = gnutls_handshake (session);
+    }
+  while (ret < 0 && gnutls_error_is_fatal(ret) == 0);
+
+  if (ret < 0)
+    {
+      fail ("client: Handshake failed\n");
+      gnutls_perror (ret);
+      exit(1);
+    }
+  else
+    {
+      if (debug)
+        success ("client: Handshake was completed\n");
+    }
+
+  if (debug)
+    success ("client: TLS version is: %s\n",
+             gnutls_protocol_get_name (gnutls_protocol_get_version
+                                       (session)));
+
+  gnutls_dtls_set_mtu(session, MTU);
+  ret = gnutls_dtls_get_data_mtu(session);
+  
+  if (MTU-ret != (int)overhead)
+    {
+      fail("overhead for %s is %d, expected %u\n", prio, MTU-ret, overhead);
+      exit(1);
+    }
+  
+  close (fd);
+
+  gnutls_deinit (session);
+
+  gnutls_anon_free_client_credentials (anoncred);
+  gnutls_certificate_free_credentials (x509_cred);
+
+  gnutls_global_deinit ();
+}
+
+
+/* These are global */
+gnutls_anon_server_credentials_t anoncred;
+gnutls_certificate_credentials_t x509_cred;
+pid_t child;
+
+static gnutls_session_t
+initialize_tls_session (const char* prio)
+{
+  gnutls_session_t session;
+
+  gnutls_init (&session, GNUTLS_SERVER|GNUTLS_DATAGRAM);
+
+  /* avoid calling all the priority functions, since the defaults
+   * are adequate.
+   */
+  gnutls_priority_set_direct (session, prio, NULL);
+
+  gnutls_credentials_set (session, GNUTLS_CRD_ANON, anoncred);
+  gnutls_credentials_set (session, GNUTLS_CRD_CERTIFICATE, x509_cred);
+
+  return session;
+}
+
+static void terminate(void)
+{
+  kill(child, SIGTERM);
+  exit(1);
+}
+
+static void
+server (int fd, const char* prio)
+{
+int ret;
+char buffer[MAX_BUF + 1];
+gnutls_session_t session;
+
+  /* this must be called once in the program
+   */
+  global_init ();
+  memset(buffer, 0, sizeof(buffer));
+
+  if (debug)
+    {
+      gnutls_global_set_log_function (server_log_func);
+      gnutls_global_set_log_level (4711);
+    }
+
+  gnutls_certificate_allocate_credentials (&x509_cred);
+  gnutls_certificate_set_x509_key_mem (x509_cred, &server_cert, &server_key,
+                                       GNUTLS_X509_FMT_PEM);
+
+  gnutls_anon_allocate_server_credentials (&anoncred);
+
+  session = initialize_tls_session (prio);
+
+  gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) fd);
+
+  do 
+    {
+      ret = gnutls_handshake (session);
+    }
+  while (ret < 0 && gnutls_error_is_fatal(ret) == 0);
+  if (ret < 0)
+    {
+      close (fd);
+      gnutls_deinit (session);
+      fail ("server: Handshake has failed (%s)\n\n", gnutls_strerror (ret));
+      terminate();
+    }
+  if (debug)
+    success ("server: Handshake was completed\n");
+
+  if (debug)
+    success ("server: TLS version is: %s\n",
+             gnutls_protocol_get_name (gnutls_protocol_get_version
+                                       (session)));
+  close(fd);
+  gnutls_deinit (session);
+
+  gnutls_anon_free_server_credentials (anoncred);
+  gnutls_certificate_free_credentials (x509_cred);
+
+  gnutls_global_deinit ();
+
+  if (debug)
+    success ("server: finished\n");
+}
+
+static void start (const char* prio, unsigned overhead)
+{
+  int fd[2];
+  int ret;
+  
+  ret = socketpair(AF_UNIX, SOCK_STREAM, 0, fd);
+  if (ret < 0)
+    {
+      perror("socketpair");
+      exit(1);
+    }
+
+  child = fork ();
+  if (child < 0)
+    {
+      perror ("fork");
+      fail ("fork");
+      exit(1);
+    }
+
+  if (child)
+    {
+      /* parent */
+      close(fd[1]);
+      server (fd[0], prio);
+      waitpid(-1, NULL, 0);
+      //kill(child, SIGTERM);
+    }
+  else 
+    {
+      close(fd[0]);
+      client (fd[1], prio, overhead);
+      exit(0);
+    }
+}
+
+static void ch_handler(int sig)
+{
+int status = 0;
+
+  waitpid(-1, &status, 0);
+  if (WEXITSTATUS(status) != 0 ||
+      (WIFSIGNALED(status) && WTERMSIG(status) == SIGSEGV))
+    {
+      if (WIFSIGNALED(status))
+        fail("Child died with sigsegv\n");
+      else
+        fail("Child died with status %d\n", WEXITSTATUS(status));
+      terminate();
+    }
+  return;
+}
+
+void
+doit (void)
+{
+  signal(SIGCHLD, ch_handler);
+
+  start("NONE:+VERS-DTLS1.0:+AES-128-CBC:+SHA1:+SIGN-ALL:+COMP-NULL:+RSA", 65);
+  start("NONE:+VERS-DTLS1.0:+AES-128-GCM:+AEAD:+SIGN-ALL:+COMP-NULL:+RSA", 33);
+  start("NONE:+VERS-DTLS1.0:+SALSA20-256:+SHA1:+SIGN-ALL:+COMP-NULL:+RSA", 33);
+  start("NONE:+VERS-DTLS1.0:+SALSA20-256:+UMAC-96:+SIGN-ALL:+COMP-NULL:+RSA", 25);
+}
+
+#endif /* _WIN32 */