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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.
#include "chrome/browser/local_discovery/privetv3_crypto_provider.h"
#include "base/logging.h"
namespace local_discovery {
namespace {
// A stub session type used for development/debugging.
const char kAuthMethodEmpty[] = "empty";
const char kHandshakeStateComplete[] = "complete";
const char kStubVerificationCode[] = "SAMPLE";
}
class PrivetV3CryptoProviderEmpty : public PrivetV3CryptoProvider {
public:
PrivetV3CryptoProviderEmpty();
virtual ~PrivetV3CryptoProviderEmpty();
// PrivetV3CryptoProvider implementation.
virtual HandshakeState GetState() OVERRIDE;
virtual std::string GetAuthMethod() OVERRIDE;
virtual HandshakeState GetNextStep(int* step, std::string* package) OVERRIDE;
virtual HandshakeState SetStepResponse(int step,
const std::string& state,
const std::string& package) OVERRIDE;
virtual std::string GetVerificationCode() OVERRIDE;
virtual HandshakeState AcceptVerificationCode() OVERRIDE;
virtual bool EncryptData(const std::string& input,
std::string* output) OVERRIDE;
private:
HandshakeState state_;
};
scoped_ptr<PrivetV3CryptoProvider> Create(
const std::vector<std::string>& available_auth_methods) {
for (size_t i = 0; i < available_auth_methods.size(); i++) {
if (available_auth_methods[i] == kAuthMethodEmpty) {
return scoped_ptr<PrivetV3CryptoProvider>(
new PrivetV3CryptoProviderEmpty());
}
}
return scoped_ptr<PrivetV3CryptoProvider>();
}
PrivetV3CryptoProviderEmpty::PrivetV3CryptoProviderEmpty()
: state_(IN_PROGRESS) {
}
PrivetV3CryptoProviderEmpty::~PrivetV3CryptoProviderEmpty() {
}
PrivetV3CryptoProvider::HandshakeState PrivetV3CryptoProviderEmpty::GetState() {
return state_;
}
std::string PrivetV3CryptoProviderEmpty::GetAuthMethod() {
return kAuthMethodEmpty;
}
PrivetV3CryptoProvider::HandshakeState PrivetV3CryptoProviderEmpty::GetNextStep(
int* step,
std::string* package) {
DCHECK(state_ == IN_PROGRESS);
*step = 0;
package->clear();
state_ = AWAITING_RESPONSE;
return state_;
}
PrivetV3CryptoProvider::HandshakeState
PrivetV3CryptoProviderEmpty::SetStepResponse(int step,
const std::string& state,
const std::string& package) {
DCHECK(state_ == AWAITING_RESPONSE);
bool success =
(step == 0 && package.empty() && state == kHandshakeStateComplete);
if (success) {
state_ = AWAITING_USER_VERIFICATION;
} else {
state_ = HANDSHAKE_ERROR;
}
return state_;
}
std::string PrivetV3CryptoProviderEmpty::GetVerificationCode() {
DCHECK(state_ == AWAITING_USER_VERIFICATION);
return kStubVerificationCode;
}
PrivetV3CryptoProvider::HandshakeState
PrivetV3CryptoProviderEmpty::AcceptVerificationCode() {
DCHECK(state_ == AWAITING_USER_VERIFICATION);
return (state_ = HANDSHAKE_COMPLETE);
}
bool PrivetV3CryptoProviderEmpty::EncryptData(const std::string& input,
std::string* output) {
*output = input;
return true;
}
} // namespace local_discovery
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