1 files changed, 66 insertions, 0 deletions
diff --git a/components/os_crypt/os_crypt_win.cc b/components/os_crypt/os_crypt_win.cc
new file mode 100644
index 0000000..1f4e749
--- /dev/null
+++ b/components/os_crypt/os_crypt_win.cc
@@ -0,0 +1,66 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "components/os_crypt/os_crypt.h"
+
+#include <windows.h>
+#include <wincrypt.h>
+
+#include "base/strings/utf_string_conversions.h"
+
+#pragma comment(lib, "crypt32.lib")
+
+bool OSCrypt::EncryptString16(const base::string16& plaintext,
+                              std::string* ciphertext) {
+  return EncryptString(base::UTF16ToUTF8(plaintext), ciphertext);
+}
+
+bool OSCrypt::DecryptString16(const std::string& ciphertext,
+                              base::string16* plaintext) {
+  std::string utf8;
+  if (!DecryptString(ciphertext, &utf8))
+    return false;
+
+  *plaintext = base::UTF8ToUTF16(utf8);
+  return true;
+}
+
+bool OSCrypt::EncryptString(const std::string& plaintext,
+                            std::string* ciphertext) {
+  DATA_BLOB input;
+  input.pbData = const_cast<BYTE*>(
+      reinterpret_cast<const BYTE*>(plaintext.data()));
+  input.cbData = static_cast<DWORD>(plaintext.length());
+
+  DATA_BLOB output;
+  BOOL result = CryptProtectData(&input, L"", NULL, NULL, NULL,
+                                 0, &output);
+  if (!result)
+    return false;
+
+  // this does a copy
+  ciphertext->assign(reinterpret_cast<std::string::value_type*>(output.pbData),
+                     output.cbData);
+
+  LocalFree(output.pbData);
+  return true;
+}
+
+bool OSCrypt::DecryptString(const std::string& ciphertext,
+                            std::string* plaintext) {
+  DATA_BLOB input;
+  input.pbData = const_cast<BYTE*>(
+      reinterpret_cast<const BYTE*>(ciphertext.data()));
+  input.cbData = static_cast<DWORD>(ciphertext.length());
+
+  DATA_BLOB output;
+  BOOL result = CryptUnprotectData(&input, NULL, NULL, NULL, NULL,
+                                   0, &output);
+  if (!result)
+    return false;
+
+  plaintext->assign(reinterpret_cast<char*>(output.pbData), output.cbData);
+  LocalFree(output.pbData);
+  return true;
+}