1 files changed, 128 insertions, 0 deletions

diff --git a/xbmc/utils/Base64.cpp b/xbmc/utils/Base64.cpp
new file mode 100644
index 0000000..6b41519
--- /dev/null
+++ b/xbmc/utils/Base64.cpp
@@ -0,0 +1,128 @@
+/*
+ *  Copyright (C) 2011-2018 Team Kodi
+ *  This file is part of Kodi - https://kodi.tv
+ *
+ *  SPDX-License-Identifier: GPL-2.0-or-later
+ *  See LICENSES/README.md for more information.
+ */
+
+#include "Base64.h"
+
+#define PADDING '='
+
+const std::string Base64::m_characters = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+                                         "abcdefghijklmnopqrstuvwxyz"
+                                         "0123456789+/";
+
+void Base64::Encode(const char* input, unsigned int length, std::string &output)
+{
+  if (input == NULL || length == 0)
+    return;
+
+  long l;
+  output.clear();
+  output.reserve(((length + 2) / 3) * 4);
+
+  for (unsigned int i = 0; i < length; i += 3)
+  {
+    l  = ((((unsigned long) input[i]) << 16) & 0xFFFFFF) |
+         ((((i + 1) < length) ? (((unsigned long) input[i + 1]) << 8) : 0) & 0xFFFF) |
+         ((((i + 2) < length) ? (((unsigned long) input[i + 2]) << 0) : 0) & 0x00FF);
+
+    output.push_back(m_characters[(l >> 18) & 0x3F]);
+    output.push_back(m_characters[(l >> 12) & 0x3F]);
+
+    if (i + 1 < length)
+      output.push_back(m_characters[(l >> 6) & 0x3F]);
+    if (i + 2 < length)
+      output.push_back(m_characters[(l >> 0) & 0x3F]);
+  }
+
+  int left = 3 - (length % 3);
+
+  if (length % 3)
+  {
+    for (int i = 0; i < left; i++)
+      output.push_back(PADDING);
+  }
+}
+
+std::string Base64::Encode(const char* input, unsigned int length)
+{
+  std::string output;
+  Encode(input, length, output);
+
+  return output;
+}
+
+void Base64::Encode(const std::string &input, std::string &output)
+{
+  Encode(input.c_str(), input.size(), output);
+}
+
+std::string Base64::Encode(const std::string &input)
+{
+  std::string output;
+  Encode(input, output);
+
+  return output;
+}
+
+void Base64::Decode(const char* input, unsigned int length, std::string &output)
+{
+  if (input == NULL || length == 0)
+    return;
+
+  long l;
+  output.clear();
+
+  for (unsigned int index = 0; index < length; index++)
+  {
+    if (input[index] == '=')
+    {
+      length = index;
+      break;
+    }
+  }
+
+  output.reserve(length - ((length + 2) / 4));
+
+  for (unsigned int i = 0; i < length; i += 4)
+  {
+    l = ((((unsigned long) m_characters.find(input[i])) & 0x3F) << 18);
+    l |= (((i + 1) < length) ? ((((unsigned long) m_characters.find(input[i + 1])) & 0x3F) << 12) : 0);
+    l |= (((i + 2) < length) ? ((((unsigned long) m_characters.find(input[i + 2])) & 0x3F) <<  6) : 0);
+    l |= (((i + 3) < length) ? ((((unsigned long) m_characters.find(input[i + 3])) & 0x3F) <<  0) : 0);
+
+    output.push_back((char)((l >> 16) & 0xFF));
+    if (i + 2 < length)
+      output.push_back((char)((l >> 8) & 0xFF));
+    if (i + 3 < length)
+      output.push_back((char)((l >> 0) & 0xFF));
+  }
+}
+
+std::string Base64::Decode(const char* input, unsigned int length)
+{
+  std::string output;
+  Decode(input, length, output);
+
+  return output;
+}
+
+void Base64::Decode(const std::string &input, std::string &output)
+{
+  size_t length = input.find_first_of(PADDING);
+  if (length == std::string::npos)
+    length = input.size();
+
+  Decode(input.c_str(), length, output);
+}
+
+std::string Base64::Decode(const std::string &input)
+{
+  std::string output;
+  Decode(input, output);
+
+  return output;
+}