Delete cryptstring.h and cryptstring.cc.

webrtc/base/cryptstring.h

-/*
- *  Copyright 2004 The WebRTC Project Authors. All rights reserved.
- *
- *  Use of this source code is governed by a BSD-style license
- *  that can be found in the LICENSE file in the root of the source
- *  tree. An additional intellectual property rights grant can be found
- *  in the file PATENTS.  All contributing project authors may
- *  be found in the AUTHORS file in the root of the source tree.
- */
-
-#ifndef _WEBRTC_BASE_CRYPTSTRING_H_
-#define _WEBRTC_BASE_CRYPTSTRING_H_
-
-#include <string.h>
-
-#include <memory>
-#include <string>
-#include <vector>
-
-namespace rtc {
-
-class CryptStringImpl {
-public:
-  virtual ~CryptStringImpl() {}
-  virtual size_t GetLength() const = 0;
-  virtual void CopyTo(char * dest, bool nullterminate) const = 0;
-  virtual std::string UrlEncode() const = 0;
-  virtual CryptStringImpl * Copy() const = 0;
-  virtual void CopyRawTo(std::vector<unsigned char> * dest) const = 0;
-};
-
-class EmptyCryptStringImpl : public CryptStringImpl {
-public:
-  ~EmptyCryptStringImpl() override {}
-  size_t GetLength() const override;
-  void CopyTo(char* dest, bool nullterminate) const override;
-  std::string UrlEncode() const override;
-  CryptStringImpl* Copy() const override;
-  void CopyRawTo(std::vector<unsigned char>* dest) const override;
-};
-
-class CryptString {
- public:
-  CryptString();
-  size_t GetLength() const { return impl_->GetLength(); }
-  void CopyTo(char * dest, bool nullterminate) const { impl_->CopyTo(dest, nullterminate); }
-  CryptString(const CryptString& other);
-  explicit CryptString(const CryptStringImpl& impl);
-  ~CryptString();
-  CryptString & operator=(const CryptString & other) {
-    if (this != &other) {
-      impl_.reset(other.impl_->Copy());
-    }
-    return *this;
-  }
-  void Clear() { impl_.reset(new EmptyCryptStringImpl()); }
-  std::string UrlEncode() const { return impl_->UrlEncode(); }
-  void CopyRawTo(std::vector<unsigned char> * dest) const {
-    return impl_->CopyRawTo(dest);
-  }
-
- private:
-  std::unique_ptr<const CryptStringImpl> impl_;
-};
-
-
-// Used for constructing strings where a password is involved and we
-// need to ensure that we zero memory afterwards
-class FormatCryptString {
-public:
-  FormatCryptString() {
-    storage_ = new char[32];
-    capacity_ = 32;
-    length_ = 0;
-    storage_[0] = 0;
-  }
-  
-  void Append(const std::string & text) {
-    Append(text.data(), text.length());
-  }
-
-  void Append(const char * data, size_t length) {
-    EnsureStorage(length_ + length + 1);
-    memcpy(storage_ + length_, data, length);
-    length_ += length;
-    storage_[length_] = '\0';
-  }
-  
-  void Append(const CryptString * password) {
-    size_t len = password->GetLength();
-    EnsureStorage(length_ + len + 1);
-    password->CopyTo(storage_ + length_, true);
-    length_ += len;
-  }
-
-  size_t GetLength() {
-    return length_;
-  }
-
-  const char * GetData() {
-    return storage_;
-  }
-
-
-  // Ensures storage of at least n bytes
-  void EnsureStorage(size_t n) {
-    if (capacity_ >= n) {
-      return;
-    }
-
-    size_t old_capacity = capacity_;
-    char * old_storage = storage_;
-
-    for (;;) {
-      capacity_ *= 2;
-      if (capacity_ >= n)
-        break;
-    }
-
-    storage_ = new char[capacity_];
-
-    if (old_capacity) {
-      memcpy(storage_, old_storage, length_);
-    
-      // zero memory in a way that an optimizer won't optimize it out
-      old_storage[0] = 0;
-      for (size_t i = 1; i < old_capacity; i++) {
-        old_storage[i] = old_storage[i - 1];
-      }
-      delete[] old_storage;
-    }
-  }  
-
-  ~FormatCryptString() {
-    if (capacity_) {
-      storage_[0] = 0;
-      for (size_t i = 1; i < capacity_; i++) {
-        storage_[i] = storage_[i - 1];
-      }
-    }
-    delete[] storage_;
-  }
-private:
-  char * storage_;
-  size_t capacity_;
-  size_t length_;
-};
-
-class InsecureCryptStringImpl : public CryptStringImpl {
- public:
-  std::string& password() { return password_; }
-  const std::string& password() const { return password_; }
-
-  ~InsecureCryptStringImpl() override = default;
-  size_t GetLength() const override;
-  void CopyTo(char* dest, bool nullterminate) const override;
-  std::string UrlEncode() const override;
-  CryptStringImpl* Copy() const override;
-  void CopyRawTo(std::vector<unsigned char>* dest) const override;
-
- private:
-  std::string password_;
-};
-
-}
-
-#endif  // _WEBRTC_BASE_CRYPTSTRING_H_