Mercurial > 510Connectbot
annotate src/com/five_ten_sg/connectbot/transport/SSH.java @ 291:9c202256d102 ganymed
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| author | Carl Byington <carl@five-ten-sg.com> |
|---|---|
| date | Fri, 18 Jul 2014 20:35:20 -0700 |
| parents | 91a31873c42a |
| children | 8c55d7714d03 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 * ConnectBot: simple, powerful, open-source SSH client for Android | |
| 3 * Copyright 2007 Kenny Root, Jeffrey Sharkey | |
| 4 * | |
| 5 * Licensed under the Apache License, Version 2.0 (the "License"); | |
| 6 * you may not use this file except in compliance with the License. | |
| 7 * You may obtain a copy of the License at | |
| 8 * | |
| 9 * http://www.apache.org/licenses/LICENSE-2.0 | |
| 10 * | |
| 11 * Unless required by applicable law or agreed to in writing, software | |
| 12 * distributed under the License is distributed on an "AS IS" BASIS, | |
| 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| 14 * See the License for the specific language governing permissions and | |
| 15 * limitations under the License. | |
| 16 */ | |
| 17 | |
| 18 package com.five_ten_sg.connectbot.transport; | |
| 19 | |
| 20 import java.io.File; | |
| 21 import java.io.IOException; | |
| 22 import java.io.InputStream; | |
| 23 import java.io.OutputStream; | |
| 24 import java.net.InetAddress; | |
| 25 import java.net.InetSocketAddress; | |
| 26 import java.net.URL; | |
| 27 import java.net.MalformedURLException; | |
| 28 import java.security.KeyPair; | |
| 29 import java.security.NoSuchAlgorithmException; | |
| 30 import java.security.PrivateKey; | |
| 31 import java.security.PublicKey; | |
| 32 import java.security.interfaces.DSAPrivateKey; | |
| 33 import java.security.interfaces.DSAPublicKey; | |
| 34 import java.security.interfaces.RSAPrivateKey; | |
| 35 import java.security.interfaces.RSAPublicKey; | |
| 36 import java.security.spec.InvalidKeySpecException; | |
| 37 import java.util.Arrays; | |
| 38 import java.util.HashMap; | |
| 39 import java.util.LinkedList; | |
| 40 import java.util.List; | |
| 41 import java.util.Locale; | |
| 42 import java.util.Map; | |
| 43 import java.util.Map.Entry; | |
| 44 import java.util.regex.Matcher; | |
| 45 import java.util.regex.Pattern; | |
| 46 | |
| 47 import com.five_ten_sg.connectbot.R; | |
| 48 import com.five_ten_sg.connectbot.bean.HostBean; | |
| 49 import com.five_ten_sg.connectbot.bean.PortForwardBean; | |
| 50 import com.five_ten_sg.connectbot.bean.PubkeyBean; | |
| 51 import com.five_ten_sg.connectbot.service.TerminalBridge; | |
| 52 import com.five_ten_sg.connectbot.service.TerminalManager; | |
| 53 import com.five_ten_sg.connectbot.service.TerminalManager.KeyHolder; | |
| 54 import com.five_ten_sg.connectbot.util.HostDatabase; | |
| 55 import com.five_ten_sg.connectbot.util.PubkeyDatabase; | |
| 56 import com.five_ten_sg.connectbot.util.PubkeyUtils; | |
| 57 import android.content.Context; | |
| 58 import android.net.Uri; | |
| 59 import android.os.Environment; | |
| 60 import android.util.Log; | |
| 61 | |
|
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62 import ch.ethz.ssh2.AuthAgentCallback; |
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63 import ch.ethz.ssh2.ChannelCondition; |
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64 import ch.ethz.ssh2.Connection; |
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65 import ch.ethz.ssh2.ConnectionInfo; |
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66 import ch.ethz.ssh2.ConnectionMonitor; |
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67 import ch.ethz.ssh2.DynamicPortForwarder; |
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68 import ch.ethz.ssh2.InteractiveCallback; |
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69 import ch.ethz.ssh2.KnownHosts; |
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70 import ch.ethz.ssh2.LocalPortForwarder; |
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71 import ch.ethz.ssh2.SCPClient; |
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72 import ch.ethz.ssh2.ServerHostKeyVerifier; |
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73 import ch.ethz.ssh2.Session; |
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74 import ch.ethz.ssh2.HTTPProxyData; |
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75 import ch.ethz.ssh2.HTTPProxyException; |
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76 import ch.ethz.ssh2.crypto.PEMDecoder; |
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77 import ch.ethz.ssh2.signature.DSASHA1Verify; |
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78 import ch.ethz.ssh2.signature.RSASHA1Verify; |
| 0 | 79 |
| 80 /** | |
| 81 * @author Kenny Root | |
| 82 * | |
| 83 */ | |
| 84 public class SSH extends AbsTransport implements ConnectionMonitor, InteractiveCallback, AuthAgentCallback { | |
| 85 private static final String PROTOCOL = "ssh"; | |
| 86 private static final String TAG = "ConnectBot.SSH"; | |
| 87 private static final int DEFAULT_PORT = 22; | |
| 88 | |
| 89 private static final String AUTH_PUBLICKEY = "publickey", | |
| 90 AUTH_PASSWORD = "password", | |
| 91 AUTH_KEYBOARDINTERACTIVE = "keyboard-interactive"; | |
| 92 | |
| 93 private final static int AUTH_TRIES = 20; | |
| 94 | |
| 95 static final Pattern hostmask; | |
| 96 static { | |
| 97 hostmask = Pattern.compile("^(.+)@([0-9a-z.-]+)(:(\\d+))?$", Pattern.CASE_INSENSITIVE); | |
| 98 } | |
| 99 | |
| 100 private boolean compression = false; | |
| 101 private String httpproxy = null; | |
| 102 private volatile boolean authenticated = false; | |
| 103 private volatile boolean connected = false; | |
| 104 private volatile boolean sessionOpen = false; | |
| 105 | |
| 106 private boolean pubkeysExhausted = false; | |
| 107 private boolean interactiveCanContinue = true; | |
| 108 | |
| 109 private Connection connection; | |
| 110 private Session session; | |
| 111 private ConnectionInfo connectionInfo; | |
| 112 | |
| 113 private OutputStream stdin; | |
| 114 private InputStream stdout; | |
| 115 private InputStream stderr; | |
| 116 | |
| 117 private static final int conditions = ChannelCondition.STDOUT_DATA | |
| 118 | ChannelCondition.STDERR_DATA | |
| 119 | ChannelCondition.CLOSED | |
| 120 | ChannelCondition.EOF; | |
| 121 | |
| 122 private List<PortForwardBean> portForwards = new LinkedList<PortForwardBean>(); | |
| 123 | |
| 124 private int columns; | |
| 125 private int rows; | |
| 126 | |
| 127 private int width; | |
| 128 private int height; | |
| 129 | |
| 130 private String useAuthAgent = HostDatabase.AUTHAGENT_NO; | |
| 131 private String agentLockPassphrase; | |
| 132 | |
| 133 public class HostKeyVerifier implements ServerHostKeyVerifier { | |
| 134 public boolean verifyServerHostKey(String hostname, int port, | |
| 135 String serverHostKeyAlgorithm, byte[] serverHostKey) throws IOException { | |
| 136 // read in all known hosts from hostdb | |
| 137 KnownHosts hosts = manager.hostdb.getKnownHosts(); | |
| 138 Boolean result; | |
| 139 String matchName = String.format(Locale.US, "%s:%d", hostname, port); | |
| 140 String fingerprint = KnownHosts.createHexFingerprint(serverHostKeyAlgorithm, serverHostKey); | |
| 141 String algorithmName; | |
| 142 | |
| 143 if ("ssh-rsa".equals(serverHostKeyAlgorithm)) | |
| 144 algorithmName = "RSA"; | |
| 145 else if ("ssh-dss".equals(serverHostKeyAlgorithm)) | |
| 146 algorithmName = "DSA"; | |
| 147 else if (serverHostKeyAlgorithm.startsWith("ecdsa-")) | |
| 148 algorithmName = "EC"; | |
| 149 else | |
| 150 algorithmName = serverHostKeyAlgorithm; | |
| 151 | |
| 152 switch (hosts.verifyHostkey(matchName, serverHostKeyAlgorithm, serverHostKey)) { | |
| 153 case KnownHosts.HOSTKEY_IS_OK: | |
| 154 bridge.outputLine(manager.res.getString(R.string.terminal_sucess, algorithmName, fingerprint)); | |
| 155 return true; | |
| 156 | |
| 157 case KnownHosts.HOSTKEY_IS_NEW: | |
| 158 // prompt user | |
| 159 bridge.outputLine(manager.res.getString(R.string.host_authenticity_warning, hostname)); | |
| 160 bridge.outputLine(manager.res.getString(R.string.host_fingerprint, algorithmName, fingerprint)); | |
| 161 result = bridge.promptHelper.requestBooleanPrompt(null, manager.res.getString(R.string.prompt_continue_connecting)); | |
| 162 | |
| 163 if (result == null) return false; | |
| 164 | |
| 165 if (result.booleanValue()) { | |
| 166 // save this key in known database | |
| 167 manager.hostdb.saveKnownHost(hostname, port, serverHostKeyAlgorithm, serverHostKey); | |
| 168 } | |
| 169 | |
| 170 return result.booleanValue(); | |
| 171 | |
| 172 case KnownHosts.HOSTKEY_HAS_CHANGED: | |
| 173 String header = String.format("@ %s @", | |
| 174 manager.res.getString(R.string.host_verification_failure_warning_header)); | |
| 175 char[] atsigns = new char[header.length()]; | |
| 176 Arrays.fill(atsigns, '@'); | |
| 177 String border = new String(atsigns); | |
| 178 bridge.outputLine(border); | |
| 179 bridge.outputLine(manager.res.getString(R.string.host_verification_failure_warning)); | |
| 180 bridge.outputLine(border); | |
| 181 bridge.outputLine(String.format(manager.res.getString(R.string.host_fingerprint), | |
| 182 algorithmName, fingerprint)); | |
| 183 // Users have no way to delete keys, so we'll prompt them for now. | |
| 184 result = bridge.promptHelper.requestBooleanPrompt(null, manager.res.getString(R.string.prompt_continue_connecting)); | |
| 185 | |
| 186 if (result == null) return false; | |
| 187 | |
| 188 if (result.booleanValue()) { | |
| 189 // save this key in known database | |
| 190 manager.hostdb.saveKnownHost(hostname, port, serverHostKeyAlgorithm, serverHostKey); | |
| 191 } | |
| 192 | |
| 193 return result.booleanValue(); | |
| 194 | |
| 195 default: | |
| 196 return false; | |
| 197 } | |
| 198 } | |
| 199 | |
| 200 } | |
| 201 | |
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202 |
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203 public SSH() { |
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204 super(); |
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205 } |
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206 |
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207 |
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208 /** |
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209 * @return protocol part of the URI |
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210 */ |
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211 public static String getProtocolName() { |
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212 return PROTOCOL; |
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213 } |
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214 |
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215 |
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216 public Uri getUri(String input) { |
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217 Matcher matcher = hostmask.matcher(input); |
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218 |
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219 if (!matcher.matches()) |
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220 return null; |
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221 |
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222 StringBuilder sb = new StringBuilder(); |
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223 sb.append(PROTOCOL) |
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224 .append("://") |
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225 .append(Uri.encode(matcher.group(1))) |
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226 .append('@') |
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227 .append(matcher.group(2)); |
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228 String portString = matcher.group(4); |
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229 int port = DEFAULT_PORT; |
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230 |
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231 if (portString != null) { |
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232 try { |
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233 port = Integer.parseInt(portString); |
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234 |
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235 if (port < 1 || port > 65535) { |
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236 port = DEFAULT_PORT; |
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237 } |
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238 } |
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239 catch (NumberFormatException nfe) { |
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240 // Keep the default port |
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241 } |
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242 } |
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243 |
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244 if (port != DEFAULT_PORT) { |
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245 sb.append(':') |
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246 .append(port); |
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247 } |
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248 |
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249 sb.append("/#") |
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250 .append(Uri.encode(input)); |
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251 Uri uri = Uri.parse(sb.toString()); |
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252 return uri; |
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253 } |
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254 |
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255 |
| 0 | 256 private void authenticate() { |
| 257 try { | |
| 258 if (connection.authenticateWithNone(host.getUsername())) { | |
| 259 finishConnection(); | |
| 260 return; | |
| 261 } | |
| 262 } | |
| 263 catch (Exception e) { | |
| 264 Log.d(TAG, "Host does not support 'none' authentication."); | |
| 265 } | |
| 266 | |
| 267 bridge.outputLine(manager.res.getString(R.string.terminal_auth)); | |
| 268 | |
| 269 try { | |
| 270 long pubkeyId = host.getPubkeyId(); | |
| 271 | |
| 272 if (!pubkeysExhausted && | |
| 273 pubkeyId != HostDatabase.PUBKEYID_NEVER && | |
| 274 connection.isAuthMethodAvailable(host.getUsername(), AUTH_PUBLICKEY)) { | |
| 275 // if explicit pubkey defined for this host, then prompt for password as needed | |
| 276 // otherwise just try all in-memory keys held in terminalmanager | |
| 277 if (pubkeyId == HostDatabase.PUBKEYID_ANY) { | |
| 278 // try each of the in-memory keys | |
| 279 bridge.outputLine(manager.res | |
| 280 .getString(R.string.terminal_auth_pubkey_any)); | |
| 281 | |
| 282 for (Entry<String, KeyHolder> entry : manager.loadedKeypairs.entrySet()) { | |
| 283 if (entry.getValue().bean.isConfirmUse() | |
| 284 && !promptForPubkeyUse(entry.getKey())) | |
| 285 continue; | |
| 286 | |
| 287 if (this.tryPublicKey(host.getUsername(), entry.getKey(), | |
| 288 entry.getValue().pair)) { | |
| 289 finishConnection(); | |
| 290 break; | |
| 291 } | |
| 292 } | |
| 293 } | |
| 294 else { | |
| 295 bridge.outputLine(manager.res.getString(R.string.terminal_auth_pubkey_specific)); | |
| 296 // use a specific key for this host, as requested | |
| 297 PubkeyBean pubkey = manager.pubkeydb.findPubkeyById(pubkeyId); | |
| 298 | |
| 299 if (pubkey == null) | |
| 300 bridge.outputLine(manager.res.getString(R.string.terminal_auth_pubkey_invalid)); | |
| 301 else if (tryPublicKey(pubkey)) | |
| 302 finishConnection(); | |
| 303 } | |
| 304 | |
| 305 pubkeysExhausted = true; | |
| 306 } | |
| 307 else if (interactiveCanContinue && | |
| 308 connection.isAuthMethodAvailable(host.getUsername(), AUTH_KEYBOARDINTERACTIVE)) { | |
| 309 // this auth method will talk with us using InteractiveCallback interface | |
| 310 // it blocks until authentication finishes | |
| 311 bridge.outputLine(manager.res.getString(R.string.terminal_auth_ki)); | |
| 312 interactiveCanContinue = false; | |
| 313 | |
| 314 if (connection.authenticateWithKeyboardInteractive(host.getUsername(), this)) { | |
| 315 finishConnection(); | |
| 316 } | |
| 317 else { | |
| 318 bridge.outputLine(manager.res.getString(R.string.terminal_auth_ki_fail)); | |
| 319 } | |
| 320 } | |
| 321 else if (connection.isAuthMethodAvailable(host.getUsername(), AUTH_PASSWORD)) { | |
| 322 bridge.outputLine(manager.res.getString(R.string.terminal_auth_pass)); | |
| 323 String password = bridge.getPromptHelper().requestPasswordPrompt(null, | |
| 324 manager.res.getString(R.string.prompt_password)); | |
| 325 | |
| 326 if (password != null | |
| 327 && connection.authenticateWithPassword(host.getUsername(), password)) { | |
| 328 finishConnection(); | |
| 329 } | |
| 330 else { | |
| 331 bridge.outputLine(manager.res.getString(R.string.terminal_auth_pass_fail)); | |
| 332 } | |
| 333 } | |
| 334 else { | |
| 335 bridge.outputLine(manager.res.getString(R.string.terminal_auth_fail)); | |
| 336 } | |
| 337 } | |
| 338 catch (IllegalStateException e) { | |
| 339 Log.e(TAG, "Connection went away while we were trying to authenticate", e); | |
| 340 return; | |
| 341 } | |
| 342 catch (Exception e) { | |
| 343 Log.e(TAG, "Problem during handleAuthentication()", e); | |
| 344 } | |
| 345 } | |
| 346 | |
|
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347 |
| 0 | 348 /** |
| 349 * Attempt connection with database row pointed to by cursor. | |
| 350 * @param cursor | |
| 351 * @return true for successful authentication | |
| 352 * @throws NoSuchAlgorithmException | |
| 353 * @throws InvalidKeySpecException | |
| 354 * @throws IOException | |
| 355 */ | |
| 356 private boolean tryPublicKey(PubkeyBean pubkey) throws NoSuchAlgorithmException, InvalidKeySpecException, IOException { | |
| 357 KeyPair pair = null; | |
| 358 | |
| 359 if (manager.isKeyLoaded(pubkey.getNickname())) { | |
| 360 // load this key from memory if its already there | |
| 361 Log.d(TAG, String.format("Found unlocked key '%s' already in-memory", pubkey.getNickname())); | |
| 362 | |
| 363 if (pubkey.isConfirmUse()) { | |
| 364 if (!promptForPubkeyUse(pubkey.getNickname())) | |
| 365 return false; | |
| 366 } | |
| 367 | |
| 368 pair = manager.getKey(pubkey.getNickname()); | |
| 369 } | |
| 370 else { | |
| 371 // otherwise load key from database and prompt for password as needed | |
| 372 String password = null; | |
| 373 | |
| 374 if (pubkey.isEncrypted()) { | |
| 375 password = bridge.getPromptHelper().requestPasswordPrompt(null, | |
| 376 manager.res.getString(R.string.prompt_pubkey_password, pubkey.getNickname())); | |
| 377 | |
| 378 // Something must have interrupted the prompt. | |
| 379 if (password == null) | |
| 380 return false; | |
| 381 } | |
| 382 | |
| 383 if (PubkeyDatabase.KEY_TYPE_IMPORTED.equals(pubkey.getType())) { | |
| 384 // load specific key using pem format | |
| 385 pair = PEMDecoder.decode(new String(pubkey.getPrivateKey()).toCharArray(), password); | |
| 386 } | |
| 387 else { | |
| 388 // load using internal generated format | |
| 389 PrivateKey privKey; | |
| 390 | |
| 391 try { | |
| 392 privKey = PubkeyUtils.decodePrivate(pubkey.getPrivateKey(), | |
| 393 pubkey.getType(), password); | |
| 394 } | |
| 395 catch (Exception e) { | |
| 396 String message = String.format("Bad password for key '%s'. Authentication failed.", pubkey.getNickname()); | |
| 397 Log.e(TAG, message, e); | |
| 398 bridge.outputLine(message); | |
| 399 return false; | |
| 400 } | |
| 401 | |
| 402 PublicKey pubKey = PubkeyUtils.decodePublic(pubkey.getPublicKey(), pubkey.getType()); | |
| 403 // convert key to trilead format | |
| 404 pair = new KeyPair(pubKey, privKey); | |
| 405 Log.d(TAG, "Unlocked key " + PubkeyUtils.formatKey(pubKey)); | |
| 406 } | |
| 407 | |
| 408 Log.d(TAG, String.format("Unlocked key '%s'", pubkey.getNickname())); | |
| 409 // save this key in memory | |
| 410 manager.addKey(pubkey, pair); | |
| 411 } | |
| 412 | |
| 413 return tryPublicKey(host.getUsername(), pubkey.getNickname(), pair); | |
| 414 } | |
| 415 | |
|
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416 |
| 0 | 417 private boolean tryPublicKey(String username, String keyNickname, KeyPair pair) throws IOException { |
| 418 //bridge.outputLine(String.format("Attempting 'publickey' with key '%s' [%s]...", keyNickname, trileadKey.toString())); | |
| 419 boolean success = connection.authenticateWithPublicKey(username, pair); | |
| 420 | |
| 421 if (!success) | |
| 422 bridge.outputLine(manager.res.getString(R.string.terminal_auth_pubkey_fail, keyNickname)); | |
| 423 | |
| 424 return success; | |
| 425 } | |
| 426 | |
|
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427 |
| 0 | 428 /** |
| 429 * Internal method to request actual PTY terminal once we've finished | |
| 430 * authentication. If called before authenticated, it will just fail. | |
| 431 */ | |
| 432 private void finishConnection() { | |
| 433 authenticated = true; | |
| 434 | |
| 435 for (PortForwardBean portForward : portForwards) { | |
| 436 try { | |
| 437 enablePortForward(portForward); | |
| 438 bridge.outputLine(manager.res.getString(R.string.terminal_enable_portfoward, portForward.getDescription())); | |
| 439 } | |
| 440 catch (Exception e) { | |
| 441 Log.e(TAG, "Error setting up port forward during connect", e); | |
| 442 } | |
| 443 } | |
| 444 | |
| 445 if (!host.getWantSession()) { | |
| 446 bridge.outputLine(manager.res.getString(R.string.terminal_no_session)); | |
| 447 bridge.onConnected(); | |
| 448 return; | |
| 449 } | |
| 450 | |
| 451 try { | |
| 452 session = connection.openSession(); | |
| 453 | |
| 454 if (!useAuthAgent.equals(HostDatabase.AUTHAGENT_NO)) | |
| 455 session.requestAuthAgentForwarding(this); | |
| 456 | |
| 457 if (host.getWantX11Forward()) { | |
| 458 try { | |
| 459 session.requestX11Forwarding(host.getX11Host(), host.getX11Port(), null, false); | |
| 460 } | |
| 461 catch (IOException e2) { | |
| 462 Log.e(TAG, "Problem while trying to setup X11 forwarding in finishConnection()", e2); | |
| 463 } | |
| 464 } | |
| 465 | |
| 466 session.requestPTY(getEmulation(), columns, rows, width, height, null); | |
| 467 session.startShell(); | |
| 468 stdin = session.getStdin(); | |
| 469 stdout = session.getStdout(); | |
| 470 stderr = session.getStderr(); | |
| 471 sessionOpen = true; | |
| 472 bridge.onConnected(); | |
| 473 } | |
| 474 catch (IOException e1) { | |
| 475 Log.e(TAG, "Problem while trying to create PTY in finishConnection()", e1); | |
| 476 } | |
| 477 } | |
| 478 | |
|
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479 |
| 0 | 480 @Override |
| 481 public void connect() { | |
| 482 connection = new Connection(host.getHostname(), host.getPort()); | |
| 483 connection.addConnectionMonitor(this); | |
| 484 | |
| 485 try { | |
| 486 connection.setCompression(compression); | |
| 487 } | |
| 488 catch (IOException e) { | |
| 489 Log.e(TAG, "Could not enable compression!", e); | |
| 490 } | |
| 491 | |
| 492 if (httpproxy != null && httpproxy.length() > 0) { | |
| 493 Log.d(TAG, "Want HTTP Proxy: " + httpproxy, null); | |
| 494 | |
| 495 try { | |
| 496 URL u; | |
| 497 | |
| 498 if (httpproxy.startsWith("http://")) { | |
| 499 u = new URL(httpproxy); | |
| 500 } | |
| 501 else { | |
| 502 u = new URL("http://" + httpproxy); | |
| 503 } | |
| 504 | |
| 505 connection.setProxyData(new HTTPProxyData( | |
| 506 u.getHost(), | |
| 507 u.getPort(), | |
| 508 u.getUserInfo(), | |
| 509 u.getAuthority())); | |
| 510 bridge.outputLine("Connecting via proxy: " + httpproxy); | |
| 511 } | |
| 512 catch (MalformedURLException e) { | |
| 513 Log.e(TAG, "Could not parse proxy " + httpproxy, e); | |
| 514 // Display the reason in the text. | |
| 515 bridge.outputLine("Bad proxy URL: " + httpproxy); | |
| 516 onDisconnect(); | |
| 517 return; | |
| 518 } | |
| 519 } | |
| 520 | |
| 521 try { | |
| 522 /* Uncomment when debugging SSH protocol: | |
| 523 DebugLogger logger = new DebugLogger() { | |
| 524 | |
| 525 public void log(int level, String className, String message) { | |
| 526 Log.d("SSH", message); | |
| 527 } | |
| 528 | |
| 529 }; | |
| 530 Logger.enabled = true; | |
| 531 Logger.logger = logger; | |
| 532 */ | |
| 533 connectionInfo = connection.connect(new HostKeyVerifier()); | |
| 534 connected = true; | |
| 535 | |
| 536 if (connectionInfo.clientToServerCryptoAlgorithm | |
| 537 .equals(connectionInfo.serverToClientCryptoAlgorithm) | |
| 538 && connectionInfo.clientToServerMACAlgorithm | |
| 539 .equals(connectionInfo.serverToClientMACAlgorithm)) { | |
| 540 bridge.outputLine(manager.res.getString(R.string.terminal_using_algorithm, | |
| 541 connectionInfo.clientToServerCryptoAlgorithm, | |
| 542 connectionInfo.clientToServerMACAlgorithm)); | |
| 543 } | |
| 544 else { | |
| 545 bridge.outputLine(manager.res.getString( | |
| 546 R.string.terminal_using_c2s_algorithm, | |
| 547 connectionInfo.clientToServerCryptoAlgorithm, | |
| 548 connectionInfo.clientToServerMACAlgorithm)); | |
| 549 bridge.outputLine(manager.res.getString( | |
| 550 R.string.terminal_using_s2c_algorithm, | |
| 551 connectionInfo.serverToClientCryptoAlgorithm, | |
| 552 connectionInfo.serverToClientMACAlgorithm)); | |
| 553 } | |
| 554 } | |
| 555 catch (HTTPProxyException e) { | |
| 556 Log.e(TAG, "Failed to connect to HTTP Proxy", e); | |
| 557 // Display the reason in the text. | |
| 558 bridge.outputLine("Failed to connect to HTTP Proxy."); | |
| 559 onDisconnect(); | |
| 560 return; | |
| 561 } | |
| 562 catch (IOException e) { | |
| 563 Log.e(TAG, "Problem in SSH connection thread during authentication", e); | |
| 564 // Display the reason in the text. | |
| 565 bridge.outputLine(e.getCause().getMessage()); | |
| 566 onDisconnect(); | |
| 567 return; | |
| 568 } | |
| 569 | |
| 570 try { | |
| 571 // enter a loop to keep trying until authentication | |
| 572 int tries = 0; | |
| 573 | |
| 574 while (connected && !connection.isAuthenticationComplete() && tries++ < AUTH_TRIES) { | |
| 575 authenticate(); | |
| 576 // sleep to make sure we dont kill system | |
| 577 Thread.sleep(1000); | |
| 578 } | |
| 579 } | |
| 580 catch (Exception e) { | |
| 581 Log.e(TAG, "Problem in SSH connection thread during authentication", e); | |
| 582 } | |
| 583 } | |
| 584 | |
| 585 | |
| 586 @Override | |
| 587 public boolean willBlock() { | |
| 588 if (stdout == null) return true; | |
|
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589 |
| 0 | 590 try { |
| 591 return stdout.available() == 0; | |
|
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592 } |
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593 catch (Exception e) { |
| 0 | 594 return true; |
| 595 } | |
| 596 } | |
| 597 | |
|
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598 |
| 0 | 599 @Override |
| 600 public int read(byte[] buffer, int start, int len) throws IOException { | |
| 601 int bytesRead = 0; | |
| 602 | |
| 603 if (session == null) | |
| 604 return 0; | |
| 605 | |
| 606 int newConditions = session.waitForCondition(conditions, 0); | |
| 607 | |
| 608 if ((newConditions & ChannelCondition.STDOUT_DATA) != 0) { | |
| 609 bytesRead = stdout.read(buffer, start, len); | |
| 610 } | |
| 611 | |
| 612 if ((newConditions & ChannelCondition.STDERR_DATA) != 0) { | |
| 613 byte discard[] = new byte[256]; | |
| 614 | |
| 615 while (stderr.available() > 0) { | |
| 616 stderr.read(discard); | |
| 617 } | |
| 618 } | |
| 619 | |
| 620 if ((newConditions & ChannelCondition.EOF) != 0) { | |
| 621 onDisconnect(); | |
| 622 throw new IOException("Remote end closed connection"); | |
| 623 } | |
| 624 | |
| 625 return bytesRead; | |
| 626 } | |
| 627 | |
|
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628 |
| 0 | 629 @Override |
| 630 public void write(byte[] buffer) throws IOException { | |
| 631 if (stdin != null) | |
| 632 stdin.write(buffer); | |
| 633 } | |
| 634 | |
|
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635 |
| 0 | 636 @Override |
| 637 public void write(int c) throws IOException { | |
| 638 if (stdin != null) | |
| 639 stdin.write(c); | |
| 640 } | |
| 641 | |
|
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642 |
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643 @Override |
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644 public void flush() throws IOException { |
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645 if (stdin != null) |
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646 stdin.flush(); |
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647 } |
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648 |
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649 |
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650 public void connectionLost(Throwable reason) { |
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651 onDisconnect(); |
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652 } |
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653 |
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654 |
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655 private void onDisconnect() { |
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656 close(); |
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657 bridge.dispatchDisconnect(false); |
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658 } |
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659 |
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660 |
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661 @Override |
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662 public void close() { |
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663 connected = false; |
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664 |
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665 if (session != null) { |
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666 session.close(); |
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667 session = null; |
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668 } |
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669 |
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670 if (connection != null) { |
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671 connection.close(); |
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672 connection = null; |
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673 } |
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674 } |
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675 |
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676 |
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677 @Override |
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678 public void setDimensions(int columns, int rows, int width, int height) { |
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679 this.columns = columns; |
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680 this.rows = rows; |
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681 |
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682 if (sessionOpen) { |
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683 try { |
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684 session.resizePTY(columns, rows, width, height); |
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685 } |
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686 catch (IOException e) { |
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687 Log.e(TAG, "Couldn't send resize PTY packet", e); |
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688 } |
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689 } |
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690 } |
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691 |
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692 |
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693 @Override |
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694 public void setOptions(Map<String, String> options) { |
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695 if (options.containsKey("compression")) |
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696 compression = Boolean.parseBoolean(options.get("compression")); |
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697 |
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698 if (options.containsKey("httpproxy")) |
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699 httpproxy = options.get("httpproxy"); |
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700 } |
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701 |
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702 |
| 0 | 703 @Override |
| 704 public Map<String, String> getOptions() { | |
| 705 Map<String, String> options = new HashMap<String, String>(); | |
| 706 options.put("compression", Boolean.toString(compression)); | |
| 707 | |
| 708 if (httpproxy != null) | |
| 709 options.put("httpproxy", httpproxy); | |
| 710 | |
| 711 return options; | |
| 712 } | |
| 713 | |
|
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714 |
| 0 | 715 @Override |
|
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716 public void setCompression(boolean compression) { |
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717 this.compression = compression; |
| 0 | 718 } |
| 719 | |
| 720 | |
| 721 @Override | |
|
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722 public void setHttpproxy(String httpproxy) { |
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723 this.httpproxy = httpproxy; |
| 0 | 724 } |
| 725 | |
|
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726 |
| 0 | 727 @Override |
|
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728 public void setUseAuthAgent(String useAuthAgent) { |
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729 this.useAuthAgent = useAuthAgent; |
| 0 | 730 } |
| 731 | |
| 732 @Override | |
| 733 public boolean canForwardPorts() { | |
| 734 return true; | |
| 735 } | |
| 736 | |
| 737 @Override | |
| 738 public List<PortForwardBean> getPortForwards() { | |
| 739 return portForwards; | |
| 740 } | |
| 741 | |
| 742 @Override | |
| 743 public boolean addPortForward(PortForwardBean portForward) { | |
| 744 return portForwards.add(portForward); | |
| 745 } | |
| 746 | |
| 747 @Override | |
| 748 public boolean removePortForward(PortForwardBean portForward) { | |
| 749 // Make sure we don't have a phantom forwarder. | |
| 750 disablePortForward(portForward); | |
| 751 return portForwards.remove(portForward); | |
| 752 } | |
| 753 | |
| 754 @Override | |
| 755 public boolean enablePortForward(PortForwardBean portForward) { | |
| 756 if (!portForwards.contains(portForward)) { | |
| 757 Log.e(TAG, "Attempt to enable port forward not in list"); | |
| 758 return false; | |
| 759 } | |
| 760 | |
| 761 if (!authenticated) | |
| 762 return false; | |
| 763 | |
| 764 if (HostDatabase.PORTFORWARD_LOCAL.equals(portForward.getType())) { | |
| 765 LocalPortForwarder lpf = null; | |
| 766 | |
| 767 try { | |
| 768 lpf = connection.createLocalPortForwarder( | |
| 769 new InetSocketAddress(InetAddress.getLocalHost(), portForward.getSourcePort()), | |
| 770 portForward.getDestAddr(), portForward.getDestPort()); | |
| 771 } | |
| 772 catch (Exception e) { | |
| 773 Log.e(TAG, "Could not create local port forward", e); | |
| 774 return false; | |
| 775 } | |
| 776 | |
| 777 if (lpf == null) { | |
| 778 Log.e(TAG, "returned LocalPortForwarder object is null"); | |
| 779 return false; | |
| 780 } | |
| 781 | |
| 782 portForward.setIdentifier(lpf); | |
| 783 portForward.setEnabled(true); | |
| 784 return true; | |
| 785 } | |
| 786 else if (HostDatabase.PORTFORWARD_REMOTE.equals(portForward.getType())) { | |
| 787 try { | |
| 788 connection.requestRemotePortForwarding("", portForward.getSourcePort(), portForward.getDestAddr(), portForward.getDestPort()); | |
| 789 } | |
| 790 catch (Exception e) { | |
| 791 Log.e(TAG, "Could not create remote port forward", e); | |
| 792 return false; | |
| 793 } | |
| 794 | |
| 795 portForward.setEnabled(true); | |
| 796 return true; | |
| 797 } | |
| 798 else if (HostDatabase.PORTFORWARD_DYNAMIC5.equals(portForward.getType())) { | |
| 799 DynamicPortForwarder dpf = null; | |
| 800 | |
| 801 try { | |
| 802 dpf = connection.createDynamicPortForwarder( | |
| 803 new InetSocketAddress(InetAddress.getLocalHost(), portForward.getSourcePort())); | |
| 804 } | |
| 805 catch (Exception e) { | |
| 806 Log.e(TAG, "Could not create dynamic port forward", e); | |
| 807 return false; | |
| 808 } | |
| 809 | |
| 810 portForward.setIdentifier(dpf); | |
| 811 portForward.setEnabled(true); | |
| 812 return true; | |
| 813 } | |
| 814 else { | |
| 815 // Unsupported type | |
| 816 Log.e(TAG, String.format("attempt to forward unknown type %s", portForward.getType())); | |
| 817 return false; | |
| 818 } | |
| 819 } | |
| 820 | |
| 821 @Override | |
| 822 public boolean disablePortForward(PortForwardBean portForward) { | |
| 823 if (!portForwards.contains(portForward)) { | |
| 824 Log.e(TAG, "Attempt to disable port forward not in list"); | |
| 825 return false; | |
| 826 } | |
| 827 | |
| 828 if (!authenticated) | |
| 829 return false; | |
| 830 | |
| 831 if (HostDatabase.PORTFORWARD_LOCAL.equals(portForward.getType())) { | |
| 832 LocalPortForwarder lpf = null; | |
| 833 lpf = (LocalPortForwarder)portForward.getIdentifier(); | |
| 834 | |
| 835 if (!portForward.isEnabled() || lpf == null) { | |
| 836 Log.d(TAG, String.format("Could not disable %s; it appears to be not enabled or have no handler", portForward.getNickname())); | |
| 837 return false; | |
| 838 } | |
| 839 | |
| 840 portForward.setEnabled(false); | |
| 841 | |
| 842 try { | |
| 843 lpf.close(); | |
| 844 } | |
| 845 catch (IOException e) { | |
| 846 Log.e(TAG, "Could not stop local port forwarder, setting enabled to false", e); | |
| 847 return false; | |
| 848 } | |
| 849 | |
| 850 return true; | |
| 851 } | |
| 852 else if (HostDatabase.PORTFORWARD_REMOTE.equals(portForward.getType())) { | |
| 853 portForward.setEnabled(false); | |
| 854 | |
| 855 try { | |
| 856 connection.cancelRemotePortForwarding(portForward.getSourcePort()); | |
| 857 } | |
| 858 catch (IOException e) { | |
| 859 Log.e(TAG, "Could not stop remote port forwarding, setting enabled to false", e); | |
| 860 return false; | |
| 861 } | |
| 862 | |
| 863 return true; | |
| 864 } | |
| 865 else if (HostDatabase.PORTFORWARD_DYNAMIC5.equals(portForward.getType())) { | |
| 866 DynamicPortForwarder dpf = null; | |
| 867 dpf = (DynamicPortForwarder)portForward.getIdentifier(); | |
| 868 | |
| 869 if (!portForward.isEnabled() || dpf == null) { | |
| 870 Log.d(TAG, String.format("Could not disable %s; it appears to be not enabled or have no handler", portForward.getNickname())); | |
| 871 return false; | |
| 872 } | |
| 873 | |
| 874 portForward.setEnabled(false); | |
| 875 | |
| 876 try { | |
| 877 dpf.close(); | |
| 878 } | |
| 879 catch (IOException e) { | |
| 880 Log.e(TAG, "Could not stop dynamic port forwarder, setting enabled to false", e); | |
| 881 return false; | |
| 882 } | |
| 883 | |
| 884 return true; | |
| 885 } | |
| 886 else { | |
| 887 // Unsupported type | |
| 888 Log.e(TAG, String.format("attempt to forward unknown type %s", portForward.getType())); | |
| 889 return false; | |
| 890 } | |
| 891 } | |
| 892 | |
| 893 @Override | |
| 894 public boolean canTransferFiles() { | |
| 895 return true; | |
| 896 } | |
| 897 | |
| 898 @Override | |
| 899 public boolean downloadFile(String remoteFile, String localFolder) { | |
| 900 try { | |
| 901 SCPClient client = new SCPClient(connection); | |
| 902 | |
| 903 if (localFolder == null || localFolder == "") | |
| 904 localFolder = Environment.getExternalStorageDirectory().getAbsolutePath(); | |
| 905 | |
| 906 File dir = new File(localFolder); | |
| 907 dir.mkdirs(); | |
| 908 client.get(remoteFile, localFolder); | |
| 909 return true; | |
| 910 } | |
| 911 catch (IOException e) { | |
| 912 Log.e(TAG, "Could not download remote file", e); | |
| 913 return false; | |
| 914 } | |
| 915 } | |
| 916 | |
| 917 @Override | |
| 918 public boolean uploadFile(String localFile, String remoteFile, | |
| 919 String remoteFolder, String mode) { | |
| 920 try { | |
| 921 SCPClient client = new SCPClient(connection); | |
| 922 | |
| 923 if (remoteFolder == null) | |
| 924 remoteFolder = ""; | |
| 925 | |
| 926 if (remoteFile == null || remoteFile == "") | |
| 927 client.put(localFile, remoteFolder, mode); | |
| 928 else | |
| 929 client.put(localFile, remoteFile, remoteFolder, mode); | |
| 930 | |
| 931 return true; | |
| 932 } | |
| 933 catch (IOException e) { | |
| 934 Log.e(TAG, "Could not upload local file", e); | |
| 935 return false; | |
| 936 } | |
| 937 } | |
| 938 | |
| 939 | |
| 940 @Override | |
| 941 public int getDefaultPort() { | |
| 942 return DEFAULT_PORT; | |
| 943 } | |
| 944 | |
|
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945 |
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946 @Override |
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947 public boolean isConnected() { |
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948 return connected; |
|
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949 } |
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950 |
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951 |
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952 @Override |
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953 public boolean isSessionOpen() { |
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954 return sessionOpen; |
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955 } |
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956 |
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957 |
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958 @Override |
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959 public boolean isAuthenticated() { |
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960 return authenticated; |
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961 } |
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962 |
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963 |
| 0 | 964 @Override |
| 965 public String getDefaultNickname(String username, String hostname, int port) { | |
| 966 if (port == DEFAULT_PORT) { | |
| 967 return String.format(Locale.US, "%s@%s", username, hostname); | |
| 968 } | |
| 969 else { | |
| 970 return String.format(Locale.US, "%s@%s:%d", username, hostname, port); | |
| 971 } | |
| 972 } | |
| 973 | |
| 974 | |
|
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975 @Override |
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976 public void getSelectionArgs(Uri uri, Map<String, String> selection) { |
|
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977 selection.put(HostDatabase.FIELD_HOST_PROTOCOL, PROTOCOL); |
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978 selection.put(HostDatabase.FIELD_HOST_NICKNAME, uri.getFragment()); |
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979 selection.put(HostDatabase.FIELD_HOST_HOSTNAME, uri.getHost()); |
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980 int port = uri.getPort(); |
| 0 | 981 |
|
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982 if (port < 0) |
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983 port = DEFAULT_PORT; |
| 0 | 984 |
|
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985 selection.put(HostDatabase.FIELD_HOST_PORT, Integer.toString(port)); |
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986 selection.put(HostDatabase.FIELD_HOST_USERNAME, uri.getUserInfo()); |
| 0 | 987 } |
| 988 | |
| 989 | |
| 990 @Override | |
| 991 public HostBean createHost(Uri uri) { | |
| 992 HostBean host = new HostBean(); | |
| 993 host.setProtocol(PROTOCOL); | |
| 994 host.setHostname(uri.getHost()); | |
| 995 int port = uri.getPort(); | |
| 996 | |
| 997 if (port < 0) | |
| 998 port = DEFAULT_PORT; | |
| 999 | |
| 1000 host.setPort(port); | |
| 1001 host.setUsername(uri.getUserInfo()); | |
| 1002 String nickname = uri.getFragment(); | |
| 1003 | |
| 1004 if (nickname == null || nickname.length() == 0) { | |
| 1005 host.setNickname(getDefaultNickname(host.getUsername(), | |
| 1006 host.getHostname(), host.getPort())); | |
| 1007 } | |
| 1008 else { | |
| 1009 host.setNickname(uri.getFragment()); | |
| 1010 } | |
| 1011 | |
| 1012 return host; | |
| 1013 } | |
| 1014 | |
| 1015 | |
| 12 | 1016 public String getFormatHint(Context context) { |
| 0 | 1017 return String.format("%s@%s:%s", |
| 1018 context.getString(R.string.format_username), | |
| 1019 context.getString(R.string.format_hostname), | |
| 1020 context.getString(R.string.format_port)); | |
| 1021 } | |
| 1022 | |
|
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1023 |
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1024 /** |
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1025 * @return do we use the network |
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1026 */ |
| 0 | 1027 @Override |
|
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1028 public boolean usesNetwork() { |
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1029 return true; |
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1030 } |
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1031 |
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1032 |
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1033 /** |
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1034 * Handle challenges from keyboard-interactive authentication mode. |
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1035 */ |
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1036 public String[] replyToChallenge(String name, String instruction, int numPrompts, String[] prompt, boolean[] echo) { |
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1037 interactiveCanContinue = true; |
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1038 String[] responses = new String[numPrompts]; |
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1039 |
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1040 for (int i = 0; i < numPrompts; i++) { |
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1041 // request response from user for each prompt |
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1042 responses[i] = bridge.promptHelper.requestPasswordPrompt(instruction, prompt[i]); |
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1043 } |
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1044 |
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1045 return responses; |
| 0 | 1046 } |
| 1047 | |
| 1048 public Map<String, byte[]> retrieveIdentities() { | |
| 1049 Map<String, byte[]> pubKeys = new HashMap<String, byte[]> (manager.loadedKeypairs.size()); | |
| 1050 | |
| 1051 for (Entry<String, KeyHolder> entry : manager.loadedKeypairs.entrySet()) { | |
| 1052 KeyPair pair = entry.getValue().pair; | |
| 1053 | |
| 1054 try { | |
| 1055 PrivateKey privKey = pair.getPrivate(); | |
| 1056 | |
| 1057 if (privKey instanceof RSAPrivateKey) { | |
| 1058 RSAPublicKey pubkey = (RSAPublicKey) pair.getPublic(); | |
| 1059 pubKeys.put(entry.getKey(), RSASHA1Verify.encodeSSHRSAPublicKey(pubkey)); | |
| 1060 } | |
| 1061 else if (privKey instanceof DSAPrivateKey) { | |
| 1062 DSAPublicKey pubkey = (DSAPublicKey) pair.getPublic(); | |
| 1063 pubKeys.put(entry.getKey(), DSASHA1Verify.encodeSSHDSAPublicKey(pubkey)); | |
| 1064 } | |
| 1065 else | |
| 1066 continue; | |
| 1067 } | |
| 1068 catch (IOException e) { | |
| 1069 continue; | |
| 1070 } | |
| 1071 } | |
| 1072 | |
| 1073 return pubKeys; | |
| 1074 } | |
| 1075 | |
| 1076 public KeyPair getKeyPair(byte[] publicKey) { | |
| 1077 String nickname = manager.getKeyNickname(publicKey); | |
| 1078 | |
| 1079 if (nickname == null) | |
| 1080 return null; | |
| 1081 | |
| 1082 if (useAuthAgent.equals(HostDatabase.AUTHAGENT_NO)) { | |
| 1083 Log.e(TAG, ""); | |
| 1084 return null; | |
| 1085 } | |
| 1086 else if (useAuthAgent.equals(HostDatabase.AUTHAGENT_CONFIRM) || | |
| 1087 manager.loadedKeypairs.get(nickname).bean.isConfirmUse()) { | |
| 1088 if (!promptForPubkeyUse(nickname)) | |
| 1089 return null; | |
| 1090 } | |
| 1091 | |
| 1092 return manager.getKey(nickname); | |
| 1093 } | |
| 1094 | |
| 1095 private boolean promptForPubkeyUse(String nickname) { | |
| 1096 Boolean result = bridge.promptHelper.requestBooleanPrompt(null, | |
| 1097 manager.res.getString(R.string.prompt_allow_agent_to_use_key, | |
| 1098 nickname)); | |
| 1099 return result; | |
| 1100 } | |
| 1101 | |
| 1102 public boolean addIdentity(KeyPair pair, String comment, boolean confirmUse, int lifetime) { | |
| 1103 PubkeyBean pubkey = new PubkeyBean(); | |
| 1104 // pubkey.setType(PubkeyDatabase.KEY_TYPE_IMPORTED); | |
| 1105 pubkey.setNickname(comment); | |
| 1106 pubkey.setConfirmUse(confirmUse); | |
| 1107 pubkey.setLifetime(lifetime); | |
| 1108 manager.addKey(pubkey, pair); | |
| 1109 return true; | |
| 1110 } | |
| 1111 | |
| 1112 public boolean removeAllIdentities() { | |
| 1113 manager.loadedKeypairs.clear(); | |
| 1114 return true; | |
| 1115 } | |
| 1116 | |
| 1117 public boolean removeIdentity(byte[] publicKey) { | |
| 1118 return manager.removeKey(publicKey); | |
| 1119 } | |
| 1120 | |
| 1121 public boolean isAgentLocked() { | |
| 1122 return agentLockPassphrase != null; | |
| 1123 } | |
| 1124 | |
| 1125 public boolean requestAgentUnlock(String unlockPassphrase) { | |
| 1126 if (agentLockPassphrase == null) | |
| 1127 return false; | |
| 1128 | |
| 1129 if (agentLockPassphrase.equals(unlockPassphrase)) | |
| 1130 agentLockPassphrase = null; | |
| 1131 | |
| 1132 return agentLockPassphrase == null; | |
| 1133 } | |
| 1134 | |
| 1135 public boolean setAgentLock(String lockPassphrase) { | |
| 1136 if (agentLockPassphrase != null) | |
| 1137 return false; | |
| 1138 | |
| 1139 agentLockPassphrase = lockPassphrase; | |
| 1140 return true; | |
| 1141 } | |
| 1142 | |
| 1143 } |