Darin Petkov | 1c11520 | 2012-03-22 15:35:47 +0100 | [diff] [blame] | 1 | // Copyright (c) 2012 The Chromium OS Authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | #include "shill/openvpn_management_server.h" |
| 6 | |
Darin Petkov | 4646302 | 2012-03-29 14:57:32 +0200 | [diff] [blame] | 7 | #include <arpa/inet.h> |
Darin Petkov | 78f6326 | 2012-03-26 01:30:24 +0200 | [diff] [blame] | 8 | #include <netinet/in.h> |
| 9 | |
| 10 | #include <base/bind.h> |
Darin Petkov | 1c11520 | 2012-03-22 15:35:47 +0100 | [diff] [blame] | 11 | #include <base/logging.h> |
Darin Petkov | 4646302 | 2012-03-29 14:57:32 +0200 | [diff] [blame] | 12 | #include <base/string_number_conversions.h> |
Darin Petkov | 78f6326 | 2012-03-26 01:30:24 +0200 | [diff] [blame] | 13 | #include <base/string_split.h> |
| 14 | #include <base/string_util.h> |
| 15 | #include <base/stringprintf.h> |
Darin Petkov | 683942b | 2012-03-27 18:00:04 +0200 | [diff] [blame] | 16 | #include <chromeos/dbus/service_constants.h> |
Darin Petkov | 78f6326 | 2012-03-26 01:30:24 +0200 | [diff] [blame] | 17 | |
| 18 | #include "shill/event_dispatcher.h" |
Darin Petkov | 683942b | 2012-03-27 18:00:04 +0200 | [diff] [blame] | 19 | #include "shill/glib.h" |
Darin Petkov | 271fe52 | 2012-03-27 13:47:29 +0200 | [diff] [blame] | 20 | #include "shill/openvpn_driver.h" |
Darin Petkov | 78f6326 | 2012-03-26 01:30:24 +0200 | [diff] [blame] | 21 | #include "shill/sockets.h" |
| 22 | |
| 23 | using base::Bind; |
Darin Petkov | 4646302 | 2012-03-29 14:57:32 +0200 | [diff] [blame] | 24 | using base::IntToString; |
Darin Petkov | 78f6326 | 2012-03-26 01:30:24 +0200 | [diff] [blame] | 25 | using base::SplitString; |
| 26 | using base::StringPrintf; |
| 27 | using std::string; |
| 28 | using std::vector; |
Darin Petkov | 1c11520 | 2012-03-22 15:35:47 +0100 | [diff] [blame] | 29 | |
| 30 | namespace shill { |
| 31 | |
Darin Petkov | 683942b | 2012-03-27 18:00:04 +0200 | [diff] [blame] | 32 | OpenVPNManagementServer::OpenVPNManagementServer(OpenVPNDriver *driver, |
| 33 | GLib *glib) |
Darin Petkov | 78f6326 | 2012-03-26 01:30:24 +0200 | [diff] [blame] | 34 | : driver_(driver), |
Darin Petkov | 683942b | 2012-03-27 18:00:04 +0200 | [diff] [blame] | 35 | glib_(glib), |
Darin Petkov | 78f6326 | 2012-03-26 01:30:24 +0200 | [diff] [blame] | 36 | weak_ptr_factory_(this), |
| 37 | ready_callback_(Bind(&OpenVPNManagementServer::OnReady, |
| 38 | weak_ptr_factory_.GetWeakPtr())), |
| 39 | input_callback_(Bind(&OpenVPNManagementServer::OnInput, |
| 40 | weak_ptr_factory_.GetWeakPtr())), |
| 41 | sockets_(NULL), |
| 42 | socket_(-1), |
| 43 | dispatcher_(NULL), |
| 44 | connected_socket_(-1) {} |
Darin Petkov | 1c11520 | 2012-03-22 15:35:47 +0100 | [diff] [blame] | 45 | |
Darin Petkov | 78f6326 | 2012-03-26 01:30:24 +0200 | [diff] [blame] | 46 | OpenVPNManagementServer::~OpenVPNManagementServer() { |
Darin Petkov | 4646302 | 2012-03-29 14:57:32 +0200 | [diff] [blame] | 47 | OpenVPNManagementServer::Stop(); |
Darin Petkov | 78f6326 | 2012-03-26 01:30:24 +0200 | [diff] [blame] | 48 | } |
Darin Petkov | 1c11520 | 2012-03-22 15:35:47 +0100 | [diff] [blame] | 49 | |
Darin Petkov | 78f6326 | 2012-03-26 01:30:24 +0200 | [diff] [blame] | 50 | bool OpenVPNManagementServer::Start(EventDispatcher *dispatcher, |
Darin Petkov | 4646302 | 2012-03-29 14:57:32 +0200 | [diff] [blame] | 51 | Sockets *sockets, |
| 52 | vector<string> *options) { |
Darin Petkov | 1c11520 | 2012-03-22 15:35:47 +0100 | [diff] [blame] | 53 | VLOG(2) << __func__; |
Darin Petkov | 78f6326 | 2012-03-26 01:30:24 +0200 | [diff] [blame] | 54 | if (sockets_) { |
| 55 | return true; |
| 56 | } |
| 57 | |
Darin Petkov | 271fe52 | 2012-03-27 13:47:29 +0200 | [diff] [blame] | 58 | int socket = sockets->Socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); |
Darin Petkov | 78f6326 | 2012-03-26 01:30:24 +0200 | [diff] [blame] | 59 | if (socket < 0) { |
| 60 | PLOG(ERROR) << "Unable to create management server socket."; |
| 61 | return false; |
| 62 | } |
| 63 | |
| 64 | struct sockaddr_in addr; |
| 65 | socklen_t addrlen = sizeof(addr); |
| 66 | memset(&addr, 0, sizeof(addr)); |
| 67 | addr.sin_family = AF_INET; |
| 68 | addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK); |
| 69 | if (sockets->Bind( |
| 70 | socket, reinterpret_cast<struct sockaddr *>(&addr), addrlen) < 0 || |
| 71 | sockets->Listen(socket, 1) < 0 || |
| 72 | sockets->GetSockName( |
| 73 | socket, reinterpret_cast<struct sockaddr *>(&addr), &addrlen) < 0) { |
| 74 | PLOG(ERROR) << "Socket setup failed."; |
| 75 | sockets->Close(socket); |
| 76 | return false; |
| 77 | } |
| 78 | |
| 79 | VLOG(2) << "Listening socket: " << socket; |
Darin Petkov | 271fe52 | 2012-03-27 13:47:29 +0200 | [diff] [blame] | 80 | sockets_ = sockets; |
Darin Petkov | 78f6326 | 2012-03-26 01:30:24 +0200 | [diff] [blame] | 81 | socket_ = socket; |
| 82 | ready_handler_.reset( |
| 83 | dispatcher->CreateReadyHandler( |
| 84 | socket, IOHandler::kModeInput, ready_callback_)); |
| 85 | dispatcher_ = dispatcher; |
Darin Petkov | 4646302 | 2012-03-29 14:57:32 +0200 | [diff] [blame] | 86 | |
| 87 | // Append openvpn management API options. |
| 88 | options->push_back("--management"); |
| 89 | options->push_back(inet_ntoa(addr.sin_addr)); |
| 90 | options->push_back(IntToString(ntohs(addr.sin_port))); |
| 91 | options->push_back("--management-client"); |
| 92 | options->push_back("--management-query-passwords"); |
| 93 | driver_->AppendFlag( |
| 94 | flimflam::kOpenVPNAuthUserPassProperty, "--auth-user-pass", options); |
| 95 | if (driver_->AppendValueOption(flimflam::kOpenVPNStaticChallengeProperty, |
| 96 | "--static-challenge", |
| 97 | options)) { |
| 98 | options->push_back("1"); // Force echo. |
| 99 | } |
Darin Petkov | 78f6326 | 2012-03-26 01:30:24 +0200 | [diff] [blame] | 100 | return true; |
| 101 | } |
| 102 | |
| 103 | void OpenVPNManagementServer::Stop() { |
| 104 | VLOG(2) << __func__; |
| 105 | if (!sockets_) { |
| 106 | return; |
| 107 | } |
| 108 | input_handler_.reset(); |
| 109 | if (connected_socket_ >= 0) { |
| 110 | sockets_->Close(connected_socket_); |
| 111 | connected_socket_ = -1; |
| 112 | } |
| 113 | dispatcher_ = NULL; |
| 114 | ready_handler_.reset(); |
| 115 | if (socket_ >= 0) { |
| 116 | sockets_->Close(socket_); |
| 117 | socket_ = -1; |
| 118 | } |
| 119 | sockets_ = NULL; |
| 120 | } |
| 121 | |
| 122 | void OpenVPNManagementServer::OnReady(int fd) { |
| 123 | VLOG(2) << __func__ << "(" << fd << ")"; |
| 124 | connected_socket_ = sockets_->Accept(fd, NULL, NULL); |
| 125 | if (connected_socket_ < 0) { |
| 126 | PLOG(ERROR) << "Connected socket accept failed."; |
| 127 | return; |
| 128 | } |
| 129 | ready_handler_.reset(); |
| 130 | input_handler_.reset( |
| 131 | dispatcher_->CreateInputHandler(connected_socket_, input_callback_)); |
| 132 | SendState("on"); |
| 133 | } |
| 134 | |
| 135 | void OpenVPNManagementServer::OnInput(InputData *data) { |
| 136 | VLOG(2) << __func__ << "(" << data->len << ")"; |
| 137 | vector<string> messages; |
| 138 | SplitString( |
| 139 | string(reinterpret_cast<char *>(data->buf), data->len), '\n', &messages); |
| 140 | for (vector<string>::const_iterator it = messages.begin(); |
| 141 | it != messages.end(); ++it) { |
| 142 | ProcessMessage(*it); |
| 143 | } |
| 144 | } |
| 145 | |
| 146 | void OpenVPNManagementServer::ProcessMessage(const string &message) { |
| 147 | VLOG(2) << __func__ << "(" << message << ")"; |
Darin Petkov | 271fe52 | 2012-03-27 13:47:29 +0200 | [diff] [blame] | 148 | LOG_IF(WARNING, |
| 149 | !ProcessInfoMessage(message) && |
| 150 | !ProcessNeedPasswordMessage(message) && |
| 151 | !ProcessFailedPasswordMessage(message) && |
| 152 | !ProcessStateMessage(message)) |
| 153 | << "OpenVPN management message ignored: " << message; |
| 154 | } |
| 155 | |
| 156 | bool OpenVPNManagementServer::ProcessInfoMessage(const string &message) { |
| 157 | return StartsWithASCII(message, ">INFO:", true); |
| 158 | } |
| 159 | |
| 160 | bool OpenVPNManagementServer::ProcessNeedPasswordMessage( |
| 161 | const string &message) { |
| 162 | if (!StartsWithASCII(message, ">PASSWORD:Need ", true)) { |
| 163 | return false; |
Darin Petkov | 78f6326 | 2012-03-26 01:30:24 +0200 | [diff] [blame] | 164 | } |
Darin Petkov | e0d5dd1 | 2012-04-04 16:10:48 +0200 | [diff] [blame] | 165 | string tag = ParseNeedPasswordTag(message); |
| 166 | if (tag == "Auth") { |
Darin Petkov | 683942b | 2012-03-27 18:00:04 +0200 | [diff] [blame] | 167 | if (message.find("SC:") != string::npos) { |
Darin Petkov | e0d5dd1 | 2012-04-04 16:10:48 +0200 | [diff] [blame] | 168 | PerformStaticChallenge(tag); |
Darin Petkov | 683942b | 2012-03-27 18:00:04 +0200 | [diff] [blame] | 169 | } else { |
| 170 | NOTIMPLEMENTED() |
| 171 | << "User/password (no-OTP) authentication not implemented."; |
| 172 | } |
Darin Petkov | e0d5dd1 | 2012-04-04 16:10:48 +0200 | [diff] [blame] | 173 | } else if (StartsWithASCII(tag, "User-Specific TPM Token", true)) { |
| 174 | SupplyTPMToken(tag); |
Darin Petkov | 683942b | 2012-03-27 18:00:04 +0200 | [diff] [blame] | 175 | } |
Darin Petkov | 271fe52 | 2012-03-27 13:47:29 +0200 | [diff] [blame] | 176 | return true; |
| 177 | } |
| 178 | |
Darin Petkov | e0d5dd1 | 2012-04-04 16:10:48 +0200 | [diff] [blame] | 179 | // static |
| 180 | string OpenVPNManagementServer::ParseNeedPasswordTag(const string &message) { |
| 181 | size_t start = message.find('\''); |
| 182 | if (start == string::npos) { |
| 183 | return string(); |
| 184 | } |
| 185 | size_t end = message.find('\'', start + 1); |
| 186 | if (end == string::npos) { |
| 187 | return string(); |
| 188 | } |
| 189 | return message.substr(start + 1, end - start - 1); |
| 190 | } |
| 191 | |
| 192 | void OpenVPNManagementServer::PerformStaticChallenge(const string &tag) { |
Darin Petkov | 683942b | 2012-03-27 18:00:04 +0200 | [diff] [blame] | 193 | string user = |
| 194 | driver_->args()->LookupString(flimflam::kOpenVPNUserProperty, ""); |
| 195 | string password = |
| 196 | driver_->args()->LookupString(flimflam::kOpenVPNPasswordProperty, ""); |
| 197 | string otp = |
| 198 | driver_->args()->LookupString(flimflam::kOpenVPNOTPProperty, ""); |
| 199 | if (user.empty() || password.empty() || otp.empty()) { |
| 200 | NOTIMPLEMENTED() << "Missing credentials."; |
| 201 | return; |
| 202 | } |
| 203 | gchar *b64_password = |
| 204 | glib_->Base64Encode(reinterpret_cast<const guchar *>(password.data()), |
| 205 | password.size()); |
| 206 | gchar *b64_otp = |
| 207 | glib_->Base64Encode(reinterpret_cast<const guchar *>(otp.data()), |
| 208 | otp.size()); |
| 209 | if (!b64_password || !b64_otp) { |
| 210 | LOG(ERROR) << "Unable to base64-encode credentials."; |
| 211 | return; |
| 212 | } |
Darin Petkov | e0d5dd1 | 2012-04-04 16:10:48 +0200 | [diff] [blame] | 213 | SendUsername(tag, user); |
| 214 | SendPassword(tag, StringPrintf("SCRV1:%s:%s", b64_password, b64_otp)); |
Darin Petkov | 683942b | 2012-03-27 18:00:04 +0200 | [diff] [blame] | 215 | glib_->Free(b64_otp); |
| 216 | glib_->Free(b64_password); |
| 217 | // Don't reuse OTP. |
| 218 | driver_->args()->RemoveString(flimflam::kOpenVPNOTPProperty); |
| 219 | } |
| 220 | |
Darin Petkov | e0d5dd1 | 2012-04-04 16:10:48 +0200 | [diff] [blame] | 221 | void OpenVPNManagementServer::SupplyTPMToken(const string &tag) { |
| 222 | string pin = driver_->args()->LookupString(flimflam::kOpenVPNPinProperty, ""); |
| 223 | if (pin.empty()) { |
| 224 | NOTIMPLEMENTED() << "Missing PIN."; |
| 225 | return; |
| 226 | } |
| 227 | SendPassword(tag, pin); |
| 228 | } |
| 229 | |
Darin Petkov | 271fe52 | 2012-03-27 13:47:29 +0200 | [diff] [blame] | 230 | bool OpenVPNManagementServer::ProcessFailedPasswordMessage( |
| 231 | const string &message) { |
| 232 | if (!StartsWithASCII(message, ">PASSWORD:Verification Failed:", true)) { |
| 233 | return false; |
Darin Petkov | 78f6326 | 2012-03-26 01:30:24 +0200 | [diff] [blame] | 234 | } |
Darin Petkov | 271fe52 | 2012-03-27 13:47:29 +0200 | [diff] [blame] | 235 | NOTIMPLEMENTED(); |
| 236 | return true; |
| 237 | } |
| 238 | |
| 239 | // >STATE:* message support. State messages are of the form: |
| 240 | // >STATE:<date>,<state>,<detail>,<local-ip>,<remote-ip> |
| 241 | // where: |
| 242 | // <date> is the current time (since epoch) in seconds |
| 243 | // <state> is one of: |
| 244 | // INITIAL, CONNECTING, WAIT, AUTH, GET_CONFIG, ASSIGN_IP, ADD_ROUTES, |
| 245 | // CONNECTED, RECONNECTING, EXITING, RESOLVE, TCP_CONNECT |
| 246 | // <detail> is a free-form string giving details about the state change |
| 247 | // <local-ip> is a dotted-quad for the local IPv4 address (when available) |
| 248 | // <remote-ip> is a dotted-quad for the remote IPv4 address (when available) |
| 249 | bool OpenVPNManagementServer::ProcessStateMessage(const string &message) { |
| 250 | if (!StartsWithASCII(message, ">STATE:", true)) { |
| 251 | return false; |
Darin Petkov | 78f6326 | 2012-03-26 01:30:24 +0200 | [diff] [blame] | 252 | } |
Darin Petkov | 271fe52 | 2012-03-27 13:47:29 +0200 | [diff] [blame] | 253 | vector<string> details; |
| 254 | SplitString(message, ',', &details); |
| 255 | if (details.size() > 1) { |
| 256 | if (details[1] == "RECONNECTING") { |
| 257 | driver_->OnReconnecting(); |
| 258 | } |
| 259 | // The rest of the states are currently ignored. |
Darin Petkov | 78f6326 | 2012-03-26 01:30:24 +0200 | [diff] [blame] | 260 | } |
Darin Petkov | 271fe52 | 2012-03-27 13:47:29 +0200 | [diff] [blame] | 261 | return true; |
Darin Petkov | 78f6326 | 2012-03-26 01:30:24 +0200 | [diff] [blame] | 262 | } |
| 263 | |
| 264 | void OpenVPNManagementServer::Send(const string &data) { |
Darin Petkov | 683942b | 2012-03-27 18:00:04 +0200 | [diff] [blame] | 265 | VLOG(2) << __func__; |
Darin Petkov | 78f6326 | 2012-03-26 01:30:24 +0200 | [diff] [blame] | 266 | ssize_t len = sockets_->Send(connected_socket_, data.data(), data.size(), 0); |
| 267 | PLOG_IF(ERROR, len < 0 || static_cast<size_t>(len) != data.size()) |
Darin Petkov | 683942b | 2012-03-27 18:00:04 +0200 | [diff] [blame] | 268 | << "Send failed."; |
Darin Petkov | 78f6326 | 2012-03-26 01:30:24 +0200 | [diff] [blame] | 269 | } |
| 270 | |
| 271 | void OpenVPNManagementServer::SendState(const string &state) { |
| 272 | VLOG(2) << __func__ << "(" << state << ")"; |
| 273 | Send(StringPrintf("state %s\n", state.c_str())); |
Darin Petkov | 1c11520 | 2012-03-22 15:35:47 +0100 | [diff] [blame] | 274 | } |
| 275 | |
Darin Petkov | 683942b | 2012-03-27 18:00:04 +0200 | [diff] [blame] | 276 | void OpenVPNManagementServer::SendUsername(const string &tag, |
| 277 | const string &username) { |
| 278 | VLOG(2) << __func__; |
| 279 | Send(StringPrintf("username \"%s\" %s\n", tag.c_str(), username.c_str())); |
| 280 | } |
| 281 | |
| 282 | void OpenVPNManagementServer::SendPassword(const string &tag, |
| 283 | const string &password) { |
| 284 | VLOG(2) << __func__; |
| 285 | Send(StringPrintf("password \"%s\" \"%s\"\n", tag.c_str(), password.c_str())); |
| 286 | } |
| 287 | |
Darin Petkov | 1c11520 | 2012-03-22 15:35:47 +0100 | [diff] [blame] | 288 | } // namespace shill |