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// Copyright (c) 2012 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/me2me_host_authenticator_factory.h"
#include <utility>
#include "base/base64.h"
#include "base/memory/ptr_util.h"
#include "base/strings/string_util.h"
#include "remoting/base/rsa_key_pair.h"
#include "remoting/protocol/channel_authenticator.h"
#include "remoting/protocol/negotiating_host_authenticator.h"
#include "remoting/protocol/rejecting_authenticator.h"
#include "remoting/protocol/token_validator.h"
#include "remoting/signaling/jid_util.h"
#include "third_party/libjingle_xmpp/xmllite/xmlelement.h"
namespace remoting {
namespace protocol {
// static
std::unique_ptr<AuthenticatorFactory>
Me2MeHostAuthenticatorFactory::CreateWithPin(
bool use_service_account,
const std::string& host_owner,
const std::string& local_cert,
scoped_refptr<RsaKeyPair> key_pair,
const std::string& required_client_domain,
const std::string& pin_hash,
scoped_refptr<PairingRegistry> pairing_registry) {
std::unique_ptr<Me2MeHostAuthenticatorFactory> result(
new Me2MeHostAuthenticatorFactory());
result->use_service_account_ = use_service_account;
result->host_owner_ = host_owner;
result->local_cert_ = local_cert;
result->key_pair_ = key_pair;
result->required_client_domain_ = required_client_domain;
result->pin_hash_ = pin_hash;
result->pairing_registry_ = pairing_registry;
return std::move(result);
}
// static
std::unique_ptr<AuthenticatorFactory>
Me2MeHostAuthenticatorFactory::CreateWithThirdPartyAuth(
bool use_service_account,
const std::string& host_owner,
const std::string& local_cert,
scoped_refptr<RsaKeyPair> key_pair,
const std::string& required_client_domain,
scoped_refptr<TokenValidatorFactory> token_validator_factory) {
std::unique_ptr<Me2MeHostAuthenticatorFactory> result(
new Me2MeHostAuthenticatorFactory());
result->use_service_account_ = use_service_account;
result->host_owner_ = host_owner;
result->local_cert_ = local_cert;
result->key_pair_ = key_pair;
result->required_client_domain_ = required_client_domain;
result->token_validator_factory_ = token_validator_factory;
return std::move(result);
}
Me2MeHostAuthenticatorFactory::Me2MeHostAuthenticatorFactory() {}
Me2MeHostAuthenticatorFactory::~Me2MeHostAuthenticatorFactory() {}
std::unique_ptr<Authenticator>
Me2MeHostAuthenticatorFactory::CreateAuthenticator(
const std::string& local_jid,
const std::string& remote_jid) {
std::string remote_jid_prefix;
if (!use_service_account_) {
// JID prefixes may not match the host owner email, for example, in cases
// where the host owner account does not have an email associated with it.
// In those cases, the only guarantee we have is that JIDs for the same
// account will have the same prefix.
if (!SplitJidResource(local_jid, &remote_jid_prefix, nullptr)) {
LOG(DFATAL) << "Invalid local JID:" << local_jid;
return base::WrapUnique(
new RejectingAuthenticator(Authenticator::INVALID_CREDENTIALS));
}
} else {
// TODO(rmsousa): This only works for cases where the JID prefix matches
// the host owner email. Figure out a way to verify the JID in other cases.
remote_jid_prefix = host_owner_;
}
// Verify that the client's jid is an ASCII string, and then check that the
// client JID has the expected prefix. Comparison is case insensitive.
if (!base::IsStringASCII(remote_jid) ||
!base::StartsWith(remote_jid, remote_jid_prefix + '/',
base::CompareCase::INSENSITIVE_ASCII)) {
LOG(ERROR) << "Rejecting incoming connection from " << remote_jid
<< ": Prefix mismatch. Expected: " << remote_jid_prefix;
return base::WrapUnique(
new RejectingAuthenticator(Authenticator::INVALID_CREDENTIALS));
}
// If necessary, verify that the client's jid belongs to the correct domain.
if (!required_client_domain_.empty()) {
std::string client_username = remote_jid;
size_t pos = client_username.find('/');
if (pos != std::string::npos) {
client_username.replace(pos, std::string::npos, "");
}
if (!base::EndsWith(client_username,
std::string("@") + required_client_domain_,
base::CompareCase::INSENSITIVE_ASCII)) {
LOG(ERROR) << "Rejecting incoming connection from " << remote_jid
<< ": Domain mismatch.";
return base::WrapUnique(
new RejectingAuthenticator(Authenticator::INVALID_ACCOUNT));
}
}
if (!local_cert_.empty() && key_pair_.get()) {
std::string normalized_local_jid = NormalizeJid(local_jid);
std::string normalized_remote_jid = NormalizeJid(remote_jid);
if (token_validator_factory_) {
return NegotiatingHostAuthenticator::CreateWithThirdPartyAuth(
normalized_local_jid, normalized_remote_jid, local_cert_, key_pair_,
token_validator_factory_);
}
return NegotiatingHostAuthenticator::CreateWithSharedSecret(
normalized_local_jid, normalized_remote_jid, local_cert_, key_pair_,
pin_hash_, pairing_registry_);
}
return base::WrapUnique(
new RejectingAuthenticator(Authenticator::INVALID_CREDENTIALS));
}
} // namespace protocol
} // namespace remoting
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