Move remaining Autofill code to //components/autofill.

chrome/browser/autofill/crypto/rc4_decryptor.h

-// Copyright (c) 2011 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.
-
-#ifndef CHROME_BROWSER_AUTOFILL_CRYPTO_RC4_DECRYPTOR_H_
-#define CHROME_BROWSER_AUTOFILL_CRYPTO_RC4_DECRYPTOR_H_
-
-#include <string>
-#include "base/basictypes.h"
-#include "base/memory/scoped_ptr.h"
-
-// This is modified RC4 decryption used for import of Toolbar autofill data
-// only. The difference from the Crypto Api implementation is twofold:
-// First, it uses a non-standard key size (160 bit), not supported by Microsoft
-// (it supports only 40 and 128 bit for RC4). Second, it codes 128 words with
-// value 0x0020 at the beginning of the code to enhance security.
-// This class used in chrome/browser/autofill/autofill_ie_toolbar_import_win.cc.
-// This class should not be used anywhere else!!!
-class RC4Decryptor {
- public:
-  explicit RC4Decryptor(wchar_t const* password) {
-    PrepareKey(reinterpret_cast<const uint8 *>(password),
-               wcslen(password) * sizeof(wchar_t));
-    std::wstring data;
-    // First 128 bytes should be spaces.
-    data.resize(128, L' ');
-    Run(data.c_str());
-  }
-
-  // Run the algorithm
-  std::wstring Run(const std::wstring& data) {
-    int data_size = data.length() * sizeof(wchar_t);
-
-    scoped_array<wchar_t> buffer(new wchar_t[data.length() + 1]);
-    memset(buffer.get(), 0, (data.length() + 1) * sizeof(wchar_t));
-    memcpy(buffer.get(), data.c_str(), data_size);
-
-    RunInternal(reinterpret_cast<uint8 *>(buffer.get()), data_size);
-
-    std::wstring result(buffer.get());
-
-    // Clear the memory
-    memset(buffer.get(), 0, data_size);
-    return result;
-  }
-
- private:
-  static const int kKeyDataSize = 256;
-  struct Rc4Key {
-    uint8 state[kKeyDataSize];
-    uint8 x;
-    uint8 y;
-  };
-
-  void SwapByte(uint8* byte1, uint8* byte2) {
-    uint8 temp = *byte1;
-    *byte1 = *byte2;
-    *byte2 = temp;
-  }
-
-  void PrepareKey(const uint8 *key_data, int key_data_len) {
-    uint8 index1 = 0;
-    uint8 index2 = 0;
-    uint8* state;
-    short counter;
-
-    state = &key_.state[0];
-    for (counter = 0; counter < kKeyDataSize; ++counter)
-      state[counter] = static_cast<uint8>(counter);
-
-    key_.x = key_.y = 0;
-
-    for (counter = 0; counter < kKeyDataSize; counter++) {
-      index2 = (key_data[index1] + state[counter] + index2) % kKeyDataSize;
-      SwapByte(&state[counter], &state[index2]);
-      index1 = (index1 + 1) % key_data_len;
-    }
-  }
-
-  void RunInternal(uint8 *buffer, int buffer_len) {
-    uint8 x, y;
-    uint8 xor_index = 0;
-    uint8* state;
-    int counter;
-
-    x = key_.x;
-    y = key_.y;
-    state = &key_.state[0];
-    for (counter = 0; counter < buffer_len; ++counter) {
-      x = (x + 1) % kKeyDataSize;
-      y = (state[x] + y) % kKeyDataSize;
-      SwapByte(&state[x], &state[y]);
-      xor_index = (state[x] + state[y]) % kKeyDataSize;
-      buffer[counter] ^= state[xor_index];
-    }
-    key_.x = x;
-    key_.y = y;
-  }
-
-  Rc4Key key_;
-};
-
-#endif  // CHROME_BROWSER_AUTOFILL_CRYPTO_RC4_DECRYPTOR_H_