1 files changed, 458 insertions, 0 deletions
diff --git a/libotr/libgcrypt-1.8.7/tests/t-lock.c b/libotr/libgcrypt-1.8.7/tests/t-lock.c
new file mode 100644
index 0000000..7e5732e
--- /dev/null
+++ b/libotr/libgcrypt-1.8.7/tests/t-lock.c
@@ -0,0 +1,458 @@
+/* t-lock.c - Check the lock functions
+ * Copyright (C) 2014 g10 Code GmbH
+ *
+ * This file is part of Libgcrypt.
+ *
+ * Libgcrypt is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public License
+ * as published by the Free Software Foundation; either version 2.1 of
+ * the License, or (at your option) any later version.
+ *
+ * Libgcrypt 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#if HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+#include <errno.h>
+#include <unistd.h>
+#if HAVE_PTHREAD
+# include <pthread.h>
+#endif
+
+#define PGM "t-lock"
+
+#include "t-common.h"
+#include "../src/gcrypt-testapi.h"
+
+/* Mingw requires us to include windows.h after winsock2.h which is
+   included by gcrypt.h.  */
+#ifdef _WIN32
+# include <windows.h>
+#endif
+
+#ifdef _WIN32
+# define THREAD_RET_TYPE  DWORD WINAPI
+# define THREAD_RET_VALUE 0
+#else
+# define THREAD_RET_TYPE  void *
+# define THREAD_RET_VALUE NULL
+#endif
+
+
+/* Number of threads to run.  */
+#define N_NONCE_THREADS 8
+/* Number of interations.  */
+#define N_NONCE_ITERATIONS 1000
+/* Requested nonce size.  */
+#define NONCE_SIZE  11
+
+
+/* This tests works by having a a couple of accountant threads which do
+   random transactions between accounts and a revision threads which
+   checks that the balance of all accounts is invariant.  The idea for
+   this check is due to Bruno Haible.  */
+#define N_ACCOUNT 8
+#define ACCOUNT_VALUE 42
+static int account[N_ACCOUNT];
+
+/* Number of transactions done by each accountant.  */
+#define N_TRANSACTIONS 1000
+
+/* Number of accountants to run.  */
+#define N_ACCOUNTANTS 5
+
+/* Maximum transaction value.  A quite low value is used so that we
+   would get an integer overflow.  */
+#define MAX_TRANSACTION_VALUE 50
+
+/* Flag to tell the revision thread to finish.  */
+static volatile int stop_revision_thread;
+
+
+struct thread_arg_s
+{
+  int no;
+};
+
+
+
+
+/* Wrapper functions to access Libgcrypt's internal test lock.  */
+static void
+external_lock_test_init (int line)
+{
+  gpg_error_t err;
+
+  err = gcry_control (PRIV_CTL_EXTERNAL_LOCK_TEST, EXTERNAL_LOCK_TEST_INIT);
+  if (err)
+    fail ("init lock failed at %d: %s", line, gpg_strerror (err));
+}
+
+static void
+external_lock_test_lock (int line)
+{
+  gpg_error_t err;
+
+  err = gcry_control (PRIV_CTL_EXTERNAL_LOCK_TEST, EXTERNAL_LOCK_TEST_LOCK);
+  if (err)
+    fail ("taking lock failed at %d: %s", line, gpg_strerror (err));
+}
+
+static void
+external_lock_test_unlock (int line)
+{
+  gpg_error_t err;
+
+  err = gcry_control (PRIV_CTL_EXTERNAL_LOCK_TEST, EXTERNAL_LOCK_TEST_UNLOCK);
+  if (err)
+    fail ("releasing lock failed at %d: %s", line, gpg_strerror (err));
+
+}
+
+static void
+external_lock_test_destroy (int line)
+{
+  gpg_error_t err;
+
+  err = gcry_control (PRIV_CTL_EXTERNAL_LOCK_TEST, EXTERNAL_LOCK_TEST_DESTROY);
+  if (err)
+    fail ("destroying lock failed at %d: %s", line, gpg_strerror (err));
+}
+
+
+
+
+/* The nonce thread.  We simply request a couple of nonces and
+   return.  */
+static THREAD_RET_TYPE
+nonce_thread (void *argarg)
+{
+  struct thread_arg_s *arg = argarg;
+  int i;
+  char nonce[NONCE_SIZE];
+
+  for (i = 0; i < N_NONCE_ITERATIONS; i++)
+    {
+      gcry_create_nonce (nonce, sizeof nonce);
+      if (i && !(i%100))
+        info ("thread %d created %d nonces so far", arg->no, i);
+    }
+
+  gcry_free (arg);
+  return THREAD_RET_VALUE;
+}
+
+
+/* To check our locking function we run several threads all accessing
+   the nonce functions.  If this function returns we know that there
+   are no obvious deadlocks or failed lock initialization.  */
+static void
+check_nonce_lock (void)
+{
+  struct thread_arg_s *arg;
+#ifdef _WIN32
+  HANDLE threads[N_NONCE_THREADS];
+  int i;
+  int rc;
+
+  for (i=0; i < N_NONCE_THREADS; i++)
+    {
+      arg = gcry_xmalloc (sizeof *arg);
+      arg->no = i;
+      threads[i] = CreateThread (NULL, 0, nonce_thread, arg, 0, NULL);
+      if (!threads[i])
+        die ("error creating nonce thread %d: rc=%d",
+             i, (int)GetLastError ());
+    }
+
+  for (i=0; i < N_NONCE_THREADS; i++)
+    {
+      rc = WaitForSingleObject (threads[i], INFINITE);
+      if (rc == WAIT_OBJECT_0)
+        info ("nonce thread %d has terminated", i);
+      else
+        fail ("waiting for nonce thread %d failed: %d",
+              i, (int)GetLastError ());
+      CloseHandle (threads[i]);
+    }
+
+#elif HAVE_PTHREAD
+  pthread_t threads[N_NONCE_THREADS];
+  int rc, i;
+
+  for (i=0; i < N_NONCE_THREADS; i++)
+    {
+      arg = gcry_xmalloc (sizeof *arg);
+      arg->no = i;
+      pthread_create (&threads[i], NULL, nonce_thread, arg);
+    }
+
+  for (i=0; i < N_NONCE_THREADS; i++)
+    {
+      rc = pthread_join (threads[i], NULL);
+      if (rc)
+        fail ("pthread_join failed for nonce thread %d: %s",
+              i, strerror (errno));
+      else
+        info ("nonce thread %d has terminated", i);
+    }
+
+#endif /*!_WIN32*/
+}
+
+
+/* Initialize all accounts.  */
+static void
+init_accounts (void)
+{
+  int i;
+
+  for (i=0; i < N_ACCOUNT; i++)
+    account[i] = ACCOUNT_VALUE;
+}
+
+
+/* Check that the sum of all accounts matches the initial sum.  */
+static void
+check_accounts (void)
+{
+  int i, sum;
+
+  sum = 0;
+  for (i = 0; i < N_ACCOUNT; i++)
+    sum += account[i];
+  if (sum != N_ACCOUNT * ACCOUNT_VALUE)
+    die ("accounts out of balance");
+}
+
+
+static void
+print_accounts (void)
+{
+  int i;
+
+  for (i=0; i < N_ACCOUNT; i++)
+    printf ("account %d: %6d\n", i, account[i]);
+}
+
+
+/* Get a a random integer value in the range 0 to HIGH.  */
+static unsigned int
+get_rand (int high)
+{
+  return (unsigned int)(1+(int)((double)(high+1)*rand ()/(RAND_MAX+1.0))) - 1;
+}
+
+
+/* Pick a random account.  Note that this function is not
+   thread-safe. */
+static int
+pick_account (void)
+{
+  return get_rand (N_ACCOUNT - 1);
+}
+
+
+/* Pick a random value for a transaction.  This is not thread-safe.  */
+static int
+pick_value (void)
+{
+  return get_rand (MAX_TRANSACTION_VALUE);
+}
+
+
+/* This is the revision department.  */
+static THREAD_RET_TYPE
+revision_thread (void *arg)
+{
+  (void)arg;
+
+  while (!stop_revision_thread)
+    {
+      external_lock_test_lock (__LINE__);
+      check_accounts ();
+      external_lock_test_unlock (__LINE__);
+    }
+  return THREAD_RET_VALUE;
+}
+
+
+/* This is one of our accountants.  */
+static THREAD_RET_TYPE
+accountant_thread (void *arg)
+{
+  int i;
+  int acc1, acc2;
+  int value;
+
+  (void)arg;
+
+  for (i = 0; i < N_TRANSACTIONS; i++)
+    {
+      external_lock_test_lock (__LINE__);
+      acc1 = pick_account ();
+      acc2 = pick_account ();
+      value = pick_value ();
+      account[acc1] += value;
+      account[acc2] -= value;
+      external_lock_test_unlock (__LINE__);
+    }
+  return THREAD_RET_VALUE;
+}
+
+
+static void
+run_test (void)
+{
+#ifdef _WIN32
+  HANDLE rthread;
+  HANDLE athreads[N_ACCOUNTANTS];
+  int i;
+  int rc;
+
+  external_lock_test_init (__LINE__);
+  stop_revision_thread = 0;
+  rthread = CreateThread (NULL, 0, revision_thread, NULL, 0, NULL);
+  if (!rthread)
+    die ("error creating revision thread: rc=%d", (int)GetLastError ());
+
+  for (i=0; i < N_ACCOUNTANTS; i++)
+    {
+      athreads[i] = CreateThread (NULL, 0, accountant_thread, NULL, 0, NULL);
+      if (!athreads[i])
+        die ("error creating accountant thread %d: rc=%d",
+             i, (int)GetLastError ());
+    }
+
+  for (i=0; i < N_ACCOUNTANTS; i++)
+    {
+      rc = WaitForSingleObject (athreads[i], INFINITE);
+      if (rc == WAIT_OBJECT_0)
+        info ("accountant thread %d has terminated", i);
+      else
+        fail ("waiting for accountant thread %d failed: %d",
+              i, (int)GetLastError ());
+      CloseHandle (athreads[i]);
+    }
+  stop_revision_thread = 1;
+
+  rc = WaitForSingleObject (rthread, INFINITE);
+  if (rc == WAIT_OBJECT_0)
+    info ("revision thread has terminated");
+  else
+    fail ("waiting for revision thread failed: %d", (int)GetLastError ());
+  CloseHandle (rthread);
+
+#else /*!_WIN32*/
+  pthread_t rthread;
+  pthread_t athreads[N_ACCOUNTANTS];
+  int rc, i;
+
+  external_lock_test_init (__LINE__);
+  stop_revision_thread = 0;
+  pthread_create (&rthread, NULL, revision_thread, NULL);
+
+  for (i=0; i < N_ACCOUNTANTS; i++)
+    pthread_create (&athreads[i], NULL, accountant_thread, NULL);
+
+  for (i=0; i < N_ACCOUNTANTS; i++)
+    {
+      rc = pthread_join (athreads[i], NULL);
+      if (rc)
+        fail ("pthread_join failed for accountant thread %d: %s",
+              i, strerror (errno));
+      else
+        info ("accountant thread %d has terminated", i);
+    }
+
+  stop_revision_thread = 1;
+  rc = pthread_join (rthread, NULL);
+  if (rc)
+    fail ("pthread_join failed for the revision thread: %s", strerror (errno));
+  else
+    info ("revision thread has terminated");
+
+#endif /*!_WIN32*/
+
+  external_lock_test_destroy (__LINE__);
+}
+
+
+
+int
+main (int argc, char **argv)
+{
+  int last_argc = -1;
+
+  if (argc)
+    {
+      argc--; argv++;
+    }
+  while (argc && last_argc != argc )
+    {
+      last_argc = argc;
+      if (!strcmp (*argv, "--help"))
+        {
+          puts (
+"usage: ./t-lock [options]\n"
+"\n"
+"Options:\n"
+"  --verbose      Show what is going on\n"
+"  --debug        Flyswatter\n"
+);
+          exit (0);
+        }
+      if (!strcmp (*argv, "--verbose"))
+        {
+          verbose = 1;
+          argc--; argv++;
+        }
+      else if (!strcmp (*argv, "--debug"))
+        {
+          verbose = debug = 1;
+          argc--; argv++;
+        }
+    }
+
+  srand (time(NULL)*getpid());
+
+  if (debug)
+    xgcry_control (GCRYCTL_SET_DEBUG_FLAGS, 1u, 0);
+  xgcry_control (GCRYCTL_DISABLE_SECMEM, 0);
+  if (!gcry_check_version (GCRYPT_VERSION))
+    die ("version mismatch");
+  /* We are using non-public interfaces - check the exact version.  */
+  if (strcmp (gcry_check_version (NULL), GCRYPT_VERSION))
+    die ("exact version match failed");
+  xgcry_control (GCRYCTL_ENABLE_QUICK_RANDOM, 0);
+  xgcry_control (GCRYCTL_INITIALIZATION_FINISHED, 0);
+
+  check_nonce_lock ();
+
+  init_accounts ();
+  check_accounts ();
+
+  run_test ();
+  check_accounts ();
+
+  /* Run a second time to check deinit code.  */
+  run_test ();
+  check_accounts ();
+
+  if (verbose)
+    print_accounts ();
+
+  return error_count ? 1 : 0;
+}