1 files changed, 129 insertions, 0 deletions
diff --git a/kopete/protocols/jabber/jingle/libjingle/talk/p2p/base/helpers.cpp b/kopete/protocols/jabber/jingle/libjingle/talk/p2p/base/helpers.cpp
new file mode 100644
index 00000000..83e02a27
--- /dev/null
+++ b/kopete/protocols/jabber/jingle/libjingle/talk/p2p/base/helpers.cpp
@@ -0,0 +1,129 @@
+/*
+ * libjingle
+ * Copyright 2004--2005, Google Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without 
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *  1. Redistributions of source code must retain the above copyright notice, 
+ *     this list of conditions and the following disclaimer.
+ *  2. Redistributions in binary form must reproduce the above copyright notice,
+ *     this list of conditions and the following disclaimer in the documentation
+ *     and/or other materials provided with the distribution.
+ *  3. The name of the author may not be used to endorse or promote products 
+ *     derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
+ * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "talk/p2p/base/helpers.h"
+#include "talk/base/jtime.h"
+#include <cstdlib>
+#include <cassert>
+
+// TODO: Change this implementation to use OpenSSL's RAND_bytes.  That will
+//       give cryptographically random values on all platforms.
+
+#ifdef WIN32
+#include <time.h>
+#include <windows.h>
+#endif
+
+namespace cricket {
+
+static long g_seed = 1L;
+
+int GetRandom() {
+  return ((g_seed = g_seed * 214013L + 2531011L) >> 16) & 0x7fff;
+}
+
+void SetRandomSeed(unsigned long seed)
+{
+  g_seed = (long)seed;
+}
+
+static bool s_initrandom;
+
+void InitRandom(const char *client_unique, size_t len) {
+  s_initrandom = true;
+
+  // Hash this string - unique per client
+
+  uint32 hash = 0;
+  if (client_unique != NULL) {
+    for (int i = 0; i < (int)len; i++)
+      hash = ((hash << 2) + hash) + client_unique[i];
+  }
+
+  // Now initialize the seed against a high resolution
+  // counter
+
+#ifdef WIN32
+  LARGE_INTEGER big;
+  QueryPerformanceCounter(&big);
+  SetRandomSeed(big.LowPart ^ hash);
+#else
+  SetRandomSeed(Time() ^ hash);
+#endif
+}
+
+const char BASE64[64] = {
+  'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M',
+  'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z',
+  'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm',
+  'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',
+  '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '+', '/'
+};
+
+// Generates a random string of the given length.  We generate base64 values so
+// that they will be printable, though that's not necessary.
+
+std::string CreateRandomString(int len) {
+  // Random number generator should of been initialized!
+  assert(s_initrandom);
+  if (!s_initrandom)
+    InitRandom(0, 0);
+
+  std::string str;
+  for (int i = 0; i < len; i++)
+#if defined(_MSC_VER) && _MSC_VER < 1300
+    str.insert(str.end(), BASE64[GetRandom() & 63]);
+#else
+    str.push_back(BASE64[GetRandom() & 63]);
+#endif
+  return str;
+}
+
+uint32 CreateRandomId() {
+  uint8 b1 = (uint8)(GetRandom() & 255);
+  uint8 b2 = (uint8)(GetRandom() & 255);
+  uint8 b3 = (uint8)(GetRandom() & 255);
+  uint8 b4 = (uint8)(GetRandom() & 255);
+  return b1 | (b2 << 8) | (b3 << 16) | (b4 << 24);
+}
+
+bool IsBase64Char(char ch) {
+  return (('A' <= ch) && (ch <= 'Z')) ||
+         (('a' <= ch) && (ch <= 'z')) ||
+         (('0' <= ch) && (ch <= '9')) ||
+         (ch == '+') || (ch == '/');
+}
+
+bool IsBase64Encoded(const std::string& str) {
+  for (size_t i = 0; i < str.size(); ++i) {
+    if (!IsBase64Char(str.at(i)))
+      return false;
+  }
+  return true;
+}
+
+} // namespace cricket