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// Copyright 2014 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_LOCAL_DISCOVERY_PRIVETV3_CRYPTO_PROVIDER_H_
#define CHROME_BROWSER_LOCAL_DISCOVERY_PRIVETV3_CRYPTO_PROVIDER_H_
#include <string>
#include <vector>
#include "base/memory/scoped_ptr.h"
namespace local_discovery {
class PrivetV3CryptoProvider {
public:
enum HandshakeState {
// Handshake still in progress. Call |GetNextStep| to send next handshake
// step.
IN_PROGRESS,
// Handshake in progress, waiting for response. Call |SetStepResponse| to
// set the step response.
AWAITING_RESPONSE,
// Handshake in progress, need to wait for user verification to
// continue. Call |GetVerificationCode| to get the verification code and
// |AcceptVerificationCode| to signify the code is accepted.
AWAITING_USER_VERIFICATION,
// Handshake complete. Call |EncryptData| to encrypt the data.
HANDSHAKE_COMPLETE,
// Handshake error.
HANDSHAKE_ERROR
};
virtual ~PrivetV3CryptoProvider() {}
static scoped_ptr<PrivetV3CryptoProvider> Create(
const std::vector<std::string>& available_auth_methods);
// Return the current state of the crypto provider.
virtual HandshakeState GetState() = 0;
// Return the authentication method used.
virtual std::string GetAuthMethod() = 0;
// Get the next handshake command. |step| is the step number to send,
// |package| is a base64-encoded package to send with the step. Return
// |true| if a package is generated or |false| in case of an error.
virtual HandshakeState GetNextStep(int* step, std::string* package) = 0;
// Input the response to the handshake command. |step| is the received step
// number, |state| is the received state string, |package| is the received
// base64-encoded package. Return the current handshake state.
virtual HandshakeState SetStepResponse(int step,
const std::string& state,
const std::string& package) = 0;
// Get the verification code to be displayed on the screen.
virtual std::string GetVerificationCode() = 0;
// Signal that the verification code is accepted. Returns the current
// handshake state.
virtual HandshakeState AcceptVerificationCode() = 0;
// Encrypt a string using the session key.
virtual bool EncryptData(const std::string& input, std::string* output) = 0;
};
} // namespace local_discovery
#endif // CHROME_BROWSER_LOCAL_DISCOVERY_PRIVETV3_CRYPTO_PROVIDER_H_
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