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// Copyright 2013 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 "remoting/protocol/third_party_client_authenticator.h"
#include "base/base64.h"
#include "base/bind.h"
#include "base/callback.h"
#include "base/logging.h"
#include "googleurl/src/gurl.h"
#include "remoting/base/constants.h"
#include "remoting/base/rsa_key_pair.h"
#include "remoting/protocol/channel_authenticator.h"
#include "remoting/protocol/v2_authenticator.h"
#include "third_party/libjingle/source/talk/xmllite/xmlelement.h"
namespace remoting {
namespace protocol {
ThirdPartyClientAuthenticator::ThirdPartyClientAuthenticator(
scoped_ptr<TokenFetcher> token_fetcher)
: ThirdPartyAuthenticatorBase(WAITING_MESSAGE),
token_fetcher_(token_fetcher.Pass()) {
}
ThirdPartyClientAuthenticator::~ThirdPartyClientAuthenticator() {
}
void ThirdPartyClientAuthenticator::ProcessTokenMessage(
const buzz::XmlElement* message,
const base::Closure& resume_callback) {
std::string token_url = message->TextNamed(kTokenUrlTag);
std::string token_scope = message->TextNamed(kTokenScopeTag);
if (token_url.empty() || token_scope.empty()) {
LOG(ERROR) << "Third-party authentication protocol error: "
"missing token verification URL or scope.";
token_state_ = REJECTED;
rejection_reason_ = PROTOCOL_ERROR;
resume_callback.Run();
return;
}
token_state_ = PROCESSING_MESSAGE;
// |token_fetcher_| is owned, so Unretained() is safe here.
token_fetcher_->FetchThirdPartyToken(
GURL(token_url), token_scope, base::Bind(
&ThirdPartyClientAuthenticator::OnThirdPartyTokenFetched,
base::Unretained(this), resume_callback));
}
void ThirdPartyClientAuthenticator::AddTokenElements(
buzz::XmlElement* message) {
DCHECK_EQ(token_state_, MESSAGE_READY);
DCHECK(!token_.empty());
buzz::XmlElement* token_tag = new buzz::XmlElement(kTokenTag);
token_tag->SetBodyText(token_);
message->AddElement(token_tag);
token_state_ = ACCEPTED;
}
void ThirdPartyClientAuthenticator::OnThirdPartyTokenFetched(
const base::Closure& resume_callback,
const std::string& third_party_token,
const std::string& shared_secret) {
token_ = third_party_token;
if (token_.empty() || shared_secret.empty()) {
token_state_ = REJECTED;
rejection_reason_ = INVALID_CREDENTIALS;
} else {
token_state_ = MESSAGE_READY;
underlying_ = V2Authenticator::CreateForClient(
shared_secret, MESSAGE_READY);
}
resume_callback.Run();
}
} // namespace protocol
} // namespace remoting
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