Move crypto files out of base, to a top level directory.

base/crypto/encryptor_win.cc

-// 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.
-
-#include "base/crypto/encryptor.h"
-
-#include <vector>
-
-#include "base/crypto/symmetric_key.h"
-
-namespace base {
-
-namespace {
-
-// On success, returns the block size (in bytes) for the algorithm that |key|
-// is for. On failure, returns 0.
-DWORD GetCipherBlockSize(HCRYPTKEY key) {
-  DWORD block_size_in_bits = 0;
-  DWORD param_size = sizeof(block_size_in_bits);
-  BOOL ok = CryptGetKeyParam(key, KP_BLOCKLEN,
-                             reinterpret_cast<BYTE*>(&block_size_in_bits),
-                             &param_size, 0);
-  if (!ok)
-    return 0;
-
-  return block_size_in_bits / 8;
-}
-
-}  // namespace
-
-Encryptor::Encryptor()
-    : key_(NULL),
-      mode_(CBC),
-      block_size_(0) {
-}
-
-Encryptor::~Encryptor() {
-}
-
-bool Encryptor::Init(SymmetricKey* key, Mode mode, const std::string& iv) {
-  DCHECK(key);
-  DCHECK_EQ(CBC, mode) << "Unsupported mode of operation";
-
-  // In CryptoAPI, the IV, padding mode, and feedback register (for a chaining
-  // mode) are properties of a key, so we have to create a copy of the key for
-  // the Encryptor.  See the Remarks section of the CryptEncrypt MSDN page.
-  BOOL ok = CryptDuplicateKey(key->key(), NULL, 0, capi_key_.receive());
-  if (!ok)
-    return false;
-
-  // CRYPT_MODE_CBC is the default for Microsoft Base Cryptographic Provider,
-  // but we set it anyway to be safe.
-  DWORD cipher_mode = CRYPT_MODE_CBC;
-  ok = CryptSetKeyParam(capi_key_.get(), KP_MODE,
-                        reinterpret_cast<BYTE*>(&cipher_mode), 0);
-  if (!ok)
-    return false;
-
-  block_size_ = GetCipherBlockSize(capi_key_.get());
-  if (block_size_ == 0)
-    return false;
-
-  if (iv.size() != block_size_)
-    return false;
-
-  ok = CryptSetKeyParam(capi_key_.get(), KP_IV,
-                        reinterpret_cast<const BYTE*>(iv.data()), 0);
-  if (!ok)
-    return false;
-
-  DWORD padding_method = PKCS5_PADDING;
-  ok = CryptSetKeyParam(capi_key_.get(), KP_PADDING,
-                        reinterpret_cast<BYTE*>(&padding_method), 0);
-  if (!ok)
-    return false;
-
-  return true;
-}
-
-bool Encryptor::Encrypt(const std::string& plaintext, std::string* ciphertext) {
-  DWORD data_len = plaintext.size();
-  DWORD total_len = data_len + block_size_;
-
-  // CryptoAPI encrypts/decrypts in place.
-  std::vector<BYTE> tmp(total_len);
-  memcpy(&tmp[0], plaintext.data(), data_len);
-
-  BOOL ok = CryptEncrypt(capi_key_.get(), NULL, TRUE, 0, &tmp[0],
-                         &data_len, total_len);
-  if (!ok)
-    return false;
-
-  ciphertext->assign(reinterpret_cast<char*>(&tmp[0]), data_len);
-  return true;
-}
-
-bool Encryptor::Decrypt(const std::string& ciphertext, std::string* plaintext) {
-  DWORD data_len = ciphertext.size();
-  if (data_len == 0)
-    return false;
-
-  std::vector<BYTE> tmp(data_len);
-  memcpy(&tmp[0], ciphertext.data(), data_len);
-
-  BOOL ok = CryptDecrypt(capi_key_.get(), NULL, TRUE, 0, &tmp[0], &data_len);
-  if (!ok)
-    return false;
-
-  DCHECK_GT(tmp.size(), data_len);
-
-  plaintext->assign(reinterpret_cast<char*>(&tmp[0]), data_len);
-  return true;
-}
-
-}  // namespace base