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-rw-r--r--crypto/encryptor_win.cc128
1 files changed, 0 insertions, 128 deletions
diff --git a/crypto/encryptor_win.cc b/crypto/encryptor_win.cc
deleted file mode 100644
index dc59519..0000000
--- a/crypto/encryptor_win.cc
+++ /dev/null
@@ -1,128 +0,0 @@
-// 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 "crypto/encryptor.h"
-
-#include <string.h>
-
-#include "base/string_util.h"
-#include "crypto/symmetric_key.h"
-
-namespace crypto {
-
-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 base::StringPiece& 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 base::StringPiece& plaintext,
- std::string* ciphertext) {
- DWORD data_len = plaintext.size();
- CHECK((data_len > 0u) || (mode_ == CBC));
- DWORD total_len = data_len + block_size_;
- CHECK_GT(total_len, 0u);
- CHECK_GT(total_len + 1, data_len);
-
- // CryptoAPI encrypts/decrypts in place.
- char* ciphertext_data = WriteInto(ciphertext, total_len + 1);
- memcpy(ciphertext_data, plaintext.data(), data_len);
-
- BOOL ok = CryptEncrypt(capi_key_.get(), NULL, TRUE, 0,
- reinterpret_cast<BYTE*>(ciphertext_data), &data_len,
- total_len);
- if (!ok) {
- ciphertext->clear();
- return false;
- }
-
- ciphertext->resize(data_len);
- return true;
-}
-
-bool Encryptor::Decrypt(const base::StringPiece& ciphertext,
- std::string* plaintext) {
- DWORD data_len = ciphertext.size();
- CHECK_GT(data_len, 0u);
- CHECK_GT(data_len + 1, data_len);
-
- // CryptoAPI encrypts/decrypts in place.
- char* plaintext_data = WriteInto(plaintext, data_len + 1);
- memcpy(plaintext_data, ciphertext.data(), data_len);
-
- BOOL ok = CryptDecrypt(capi_key_.get(), NULL, TRUE, 0,
- reinterpret_cast<BYTE*>(plaintext_data), &data_len);
- if (!ok) {
- plaintext->clear();
- return false;
- }
-
- plaintext->resize(data_len);
- return true;
-}
-
-} // namespace crypto