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/*
* 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 RTC_BASE_CRYPT_STRING_H_
#define RTC_BASE_CRYPT_STRING_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_;
};
} // namespace rtc
#endif // RTC_BASE_CRYPT_STRING_H_
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