Mercurial > 510Connectbot
annotate src/com/five_ten_sg/connectbot/transport/SSH.java @ 296:8c55d7714d03 ganymed
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| author | Carl Byington <carl@five-ten-sg.com> |
|---|---|
| date | Tue, 29 Jul 2014 16:35:48 -0700 |
| parents | 91a31873c42a |
| children | 4c3a4e88c027 |
| 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; | |
|
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34 import java.security.interfaces.ECPrivateKey; |
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35 import java.security.interfaces.ECPublicKey; |
| 0 | 36 import java.security.interfaces.RSAPrivateKey; |
| 37 import java.security.interfaces.RSAPublicKey; | |
| 38 import java.security.spec.InvalidKeySpecException; | |
| 39 import java.util.Arrays; | |
| 40 import java.util.HashMap; | |
| 41 import java.util.LinkedList; | |
| 42 import java.util.List; | |
| 43 import java.util.Locale; | |
| 44 import java.util.Map; | |
| 45 import java.util.Map.Entry; | |
| 46 import java.util.regex.Matcher; | |
| 47 import java.util.regex.Pattern; | |
| 48 | |
| 49 import com.five_ten_sg.connectbot.R; | |
| 50 import com.five_ten_sg.connectbot.bean.HostBean; | |
| 51 import com.five_ten_sg.connectbot.bean.PortForwardBean; | |
| 52 import com.five_ten_sg.connectbot.bean.PubkeyBean; | |
| 53 import com.five_ten_sg.connectbot.service.TerminalBridge; | |
| 54 import com.five_ten_sg.connectbot.service.TerminalManager; | |
| 55 import com.five_ten_sg.connectbot.service.TerminalManager.KeyHolder; | |
| 56 import com.five_ten_sg.connectbot.util.HostDatabase; | |
| 57 import com.five_ten_sg.connectbot.util.PubkeyDatabase; | |
| 58 import com.five_ten_sg.connectbot.util.PubkeyUtils; | |
| 59 import android.content.Context; | |
| 60 import android.net.Uri; | |
| 61 import android.os.Environment; | |
| 62 import android.util.Log; | |
| 63 | |
|
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64 import ch.ethz.ssh2.AuthAgentCallback; |
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65 import ch.ethz.ssh2.ChannelCondition; |
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66 import ch.ethz.ssh2.Connection; |
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67 import ch.ethz.ssh2.ConnectionInfo; |
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68 import ch.ethz.ssh2.ConnectionMonitor; |
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69 import ch.ethz.ssh2.DynamicPortForwarder; |
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70 import ch.ethz.ssh2.InteractiveCallback; |
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71 import ch.ethz.ssh2.KnownHosts; |
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72 import ch.ethz.ssh2.LocalPortForwarder; |
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73 import ch.ethz.ssh2.SCPClient; |
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74 import ch.ethz.ssh2.ServerHostKeyVerifier; |
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75 import ch.ethz.ssh2.Session; |
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76 import ch.ethz.ssh2.HTTPProxyData; |
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77 import ch.ethz.ssh2.HTTPProxyException; |
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78 import ch.ethz.ssh2.crypto.PEMDecoder; |
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79 import ch.ethz.ssh2.signature.DSASHA1Verify; |
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80 import ch.ethz.ssh2.signature.ECDSASHA2Verify; |
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81 import ch.ethz.ssh2.signature.RSASHA1Verify; |
| 0 | 82 |
| 83 /** | |
| 84 * @author Kenny Root | |
| 85 * | |
| 86 */ | |
| 87 public class SSH extends AbsTransport implements ConnectionMonitor, InteractiveCallback, AuthAgentCallback { | |
| 88 private static final String PROTOCOL = "ssh"; | |
| 89 private static final String TAG = "ConnectBot.SSH"; | |
| 90 private static final int DEFAULT_PORT = 22; | |
| 91 | |
| 92 private static final String AUTH_PUBLICKEY = "publickey", | |
| 93 AUTH_PASSWORD = "password", | |
| 94 AUTH_KEYBOARDINTERACTIVE = "keyboard-interactive"; | |
| 95 | |
| 96 private final static int AUTH_TRIES = 20; | |
| 97 | |
| 98 static final Pattern hostmask; | |
| 99 static { | |
| 100 hostmask = Pattern.compile("^(.+)@([0-9a-z.-]+)(:(\\d+))?$", Pattern.CASE_INSENSITIVE); | |
| 101 } | |
| 102 | |
| 103 private boolean compression = false; | |
| 104 private String httpproxy = null; | |
| 105 private volatile boolean authenticated = false; | |
| 106 private volatile boolean connected = false; | |
| 107 private volatile boolean sessionOpen = false; | |
| 108 | |
| 109 private boolean pubkeysExhausted = false; | |
| 110 private boolean interactiveCanContinue = true; | |
| 111 | |
| 112 private Connection connection; | |
| 113 private Session session; | |
| 114 private ConnectionInfo connectionInfo; | |
| 115 | |
| 116 private OutputStream stdin; | |
| 117 private InputStream stdout; | |
| 118 private InputStream stderr; | |
| 119 | |
| 120 private static final int conditions = ChannelCondition.STDOUT_DATA | |
| 121 | ChannelCondition.STDERR_DATA | |
| 122 | ChannelCondition.CLOSED | |
| 123 | ChannelCondition.EOF; | |
| 124 | |
| 125 private List<PortForwardBean> portForwards = new LinkedList<PortForwardBean>(); | |
| 126 | |
| 127 private int columns; | |
| 128 private int rows; | |
| 129 | |
| 130 private int width; | |
| 131 private int height; | |
| 132 | |
| 133 private String useAuthAgent = HostDatabase.AUTHAGENT_NO; | |
| 134 private String agentLockPassphrase; | |
| 135 | |
| 136 public class HostKeyVerifier implements ServerHostKeyVerifier { | |
| 137 public boolean verifyServerHostKey(String hostname, int port, | |
| 138 String serverHostKeyAlgorithm, byte[] serverHostKey) throws IOException { | |
| 139 // read in all known hosts from hostdb | |
| 140 KnownHosts hosts = manager.hostdb.getKnownHosts(); | |
| 141 Boolean result; | |
| 142 String matchName = String.format(Locale.US, "%s:%d", hostname, port); | |
| 143 String fingerprint = KnownHosts.createHexFingerprint(serverHostKeyAlgorithm, serverHostKey); | |
| 144 String algorithmName; | |
| 145 | |
| 146 if ("ssh-rsa".equals(serverHostKeyAlgorithm)) | |
| 147 algorithmName = "RSA"; | |
| 148 else if ("ssh-dss".equals(serverHostKeyAlgorithm)) | |
| 149 algorithmName = "DSA"; | |
| 150 else if (serverHostKeyAlgorithm.startsWith("ecdsa-")) | |
| 151 algorithmName = "EC"; | |
| 152 else | |
| 153 algorithmName = serverHostKeyAlgorithm; | |
| 154 | |
| 155 switch (hosts.verifyHostkey(matchName, serverHostKeyAlgorithm, serverHostKey)) { | |
| 156 case KnownHosts.HOSTKEY_IS_OK: | |
| 157 bridge.outputLine(manager.res.getString(R.string.terminal_sucess, algorithmName, fingerprint)); | |
| 158 return true; | |
| 159 | |
| 160 case KnownHosts.HOSTKEY_IS_NEW: | |
| 161 // prompt user | |
| 162 bridge.outputLine(manager.res.getString(R.string.host_authenticity_warning, hostname)); | |
| 163 bridge.outputLine(manager.res.getString(R.string.host_fingerprint, algorithmName, fingerprint)); | |
| 164 result = bridge.promptHelper.requestBooleanPrompt(null, manager.res.getString(R.string.prompt_continue_connecting)); | |
| 165 | |
| 166 if (result == null) return false; | |
| 167 | |
| 168 if (result.booleanValue()) { | |
| 169 // save this key in known database | |
| 170 manager.hostdb.saveKnownHost(hostname, port, serverHostKeyAlgorithm, serverHostKey); | |
| 171 } | |
| 172 | |
| 173 return result.booleanValue(); | |
| 174 | |
| 175 case KnownHosts.HOSTKEY_HAS_CHANGED: | |
| 176 String header = String.format("@ %s @", | |
| 177 manager.res.getString(R.string.host_verification_failure_warning_header)); | |
| 178 char[] atsigns = new char[header.length()]; | |
| 179 Arrays.fill(atsigns, '@'); | |
| 180 String border = new String(atsigns); | |
| 181 bridge.outputLine(border); | |
| 182 bridge.outputLine(manager.res.getString(R.string.host_verification_failure_warning)); | |
| 183 bridge.outputLine(border); | |
| 184 bridge.outputLine(String.format(manager.res.getString(R.string.host_fingerprint), | |
| 185 algorithmName, fingerprint)); | |
| 186 // Users have no way to delete keys, so we'll prompt them for now. | |
| 187 result = bridge.promptHelper.requestBooleanPrompt(null, manager.res.getString(R.string.prompt_continue_connecting)); | |
| 188 | |
| 189 if (result == null) return false; | |
| 190 | |
| 191 if (result.booleanValue()) { | |
| 192 // save this key in known database | |
| 193 manager.hostdb.saveKnownHost(hostname, port, serverHostKeyAlgorithm, serverHostKey); | |
| 194 } | |
| 195 | |
| 196 return result.booleanValue(); | |
| 197 | |
| 198 default: | |
| 199 return false; | |
| 200 } | |
| 201 } | |
| 202 | |
| 203 } | |
| 204 | |
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205 |
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206 public SSH() { |
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207 super(); |
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208 } |
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209 |
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210 |
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211 /** |
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212 * @return protocol part of the URI |
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213 */ |
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214 public static String getProtocolName() { |
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215 return PROTOCOL; |
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216 } |
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217 |
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218 |
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219 public Uri getUri(String input) { |
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220 Matcher matcher = hostmask.matcher(input); |
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221 |
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222 if (!matcher.matches()) |
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223 return null; |
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224 |
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225 StringBuilder sb = new StringBuilder(); |
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226 sb.append(PROTOCOL) |
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227 .append("://") |
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228 .append(Uri.encode(matcher.group(1))) |
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229 .append('@') |
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230 .append(matcher.group(2)); |
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231 String portString = matcher.group(4); |
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232 int port = DEFAULT_PORT; |
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233 |
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234 if (portString != null) { |
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235 try { |
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236 port = Integer.parseInt(portString); |
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237 |
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238 if (port < 1 || port > 65535) { |
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239 port = DEFAULT_PORT; |
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240 } |
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241 } |
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242 catch (NumberFormatException nfe) { |
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243 // Keep the default port |
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244 } |
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245 } |
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246 |
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247 if (port != DEFAULT_PORT) { |
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248 sb.append(':') |
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249 .append(port); |
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250 } |
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251 |
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252 sb.append("/#") |
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253 .append(Uri.encode(input)); |
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254 Uri uri = Uri.parse(sb.toString()); |
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255 return uri; |
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256 } |
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257 |
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258 |
| 0 | 259 private void authenticate() { |
| 260 try { | |
| 261 if (connection.authenticateWithNone(host.getUsername())) { | |
| 262 finishConnection(); | |
| 263 return; | |
| 264 } | |
| 265 } | |
| 266 catch (Exception e) { | |
| 267 Log.d(TAG, "Host does not support 'none' authentication."); | |
| 268 } | |
| 269 | |
| 270 bridge.outputLine(manager.res.getString(R.string.terminal_auth)); | |
| 271 | |
| 272 try { | |
| 273 long pubkeyId = host.getPubkeyId(); | |
| 274 | |
| 275 if (!pubkeysExhausted && | |
| 276 pubkeyId != HostDatabase.PUBKEYID_NEVER && | |
| 277 connection.isAuthMethodAvailable(host.getUsername(), AUTH_PUBLICKEY)) { | |
| 278 // if explicit pubkey defined for this host, then prompt for password as needed | |
| 279 // otherwise just try all in-memory keys held in terminalmanager | |
| 280 if (pubkeyId == HostDatabase.PUBKEYID_ANY) { | |
| 281 // try each of the in-memory keys | |
| 282 bridge.outputLine(manager.res | |
| 283 .getString(R.string.terminal_auth_pubkey_any)); | |
| 284 | |
| 285 for (Entry<String, KeyHolder> entry : manager.loadedKeypairs.entrySet()) { | |
| 286 if (entry.getValue().bean.isConfirmUse() | |
| 287 && !promptForPubkeyUse(entry.getKey())) | |
| 288 continue; | |
| 289 | |
| 290 if (this.tryPublicKey(host.getUsername(), entry.getKey(), | |
| 291 entry.getValue().pair)) { | |
| 292 finishConnection(); | |
| 293 break; | |
| 294 } | |
| 295 } | |
| 296 } | |
| 297 else { | |
| 298 bridge.outputLine(manager.res.getString(R.string.terminal_auth_pubkey_specific)); | |
| 299 // use a specific key for this host, as requested | |
| 300 PubkeyBean pubkey = manager.pubkeydb.findPubkeyById(pubkeyId); | |
| 301 | |
| 302 if (pubkey == null) | |
| 303 bridge.outputLine(manager.res.getString(R.string.terminal_auth_pubkey_invalid)); | |
| 304 else if (tryPublicKey(pubkey)) | |
| 305 finishConnection(); | |
| 306 } | |
| 307 | |
| 308 pubkeysExhausted = true; | |
| 309 } | |
| 310 else if (interactiveCanContinue && | |
| 311 connection.isAuthMethodAvailable(host.getUsername(), AUTH_KEYBOARDINTERACTIVE)) { | |
| 312 // this auth method will talk with us using InteractiveCallback interface | |
| 313 // it blocks until authentication finishes | |
| 314 bridge.outputLine(manager.res.getString(R.string.terminal_auth_ki)); | |
| 315 interactiveCanContinue = false; | |
| 316 | |
| 317 if (connection.authenticateWithKeyboardInteractive(host.getUsername(), this)) { | |
| 318 finishConnection(); | |
| 319 } | |
| 320 else { | |
| 321 bridge.outputLine(manager.res.getString(R.string.terminal_auth_ki_fail)); | |
| 322 } | |
| 323 } | |
| 324 else if (connection.isAuthMethodAvailable(host.getUsername(), AUTH_PASSWORD)) { | |
| 325 bridge.outputLine(manager.res.getString(R.string.terminal_auth_pass)); | |
| 326 String password = bridge.getPromptHelper().requestPasswordPrompt(null, | |
| 327 manager.res.getString(R.string.prompt_password)); | |
| 328 | |
| 329 if (password != null | |
| 330 && connection.authenticateWithPassword(host.getUsername(), password)) { | |
| 331 finishConnection(); | |
| 332 } | |
| 333 else { | |
| 334 bridge.outputLine(manager.res.getString(R.string.terminal_auth_pass_fail)); | |
| 335 } | |
| 336 } | |
| 337 else { | |
| 338 bridge.outputLine(manager.res.getString(R.string.terminal_auth_fail)); | |
| 339 } | |
| 340 } | |
| 341 catch (IllegalStateException e) { | |
| 342 Log.e(TAG, "Connection went away while we were trying to authenticate", e); | |
| 343 return; | |
| 344 } | |
| 345 catch (Exception e) { | |
| 346 Log.e(TAG, "Problem during handleAuthentication()", e); | |
| 347 } | |
| 348 } | |
| 349 | |
|
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350 |
| 0 | 351 /** |
| 352 * Attempt connection with database row pointed to by cursor. | |
| 353 * @param cursor | |
| 354 * @return true for successful authentication | |
| 355 * @throws NoSuchAlgorithmException | |
| 356 * @throws InvalidKeySpecException | |
| 357 * @throws IOException | |
| 358 */ | |
| 359 private boolean tryPublicKey(PubkeyBean pubkey) throws NoSuchAlgorithmException, InvalidKeySpecException, IOException { | |
| 360 KeyPair pair = null; | |
| 361 | |
| 362 if (manager.isKeyLoaded(pubkey.getNickname())) { | |
| 363 // load this key from memory if its already there | |
| 364 Log.d(TAG, String.format("Found unlocked key '%s' already in-memory", pubkey.getNickname())); | |
| 365 | |
| 366 if (pubkey.isConfirmUse()) { | |
| 367 if (!promptForPubkeyUse(pubkey.getNickname())) | |
| 368 return false; | |
| 369 } | |
| 370 | |
| 371 pair = manager.getKey(pubkey.getNickname()); | |
| 372 } | |
| 373 else { | |
| 374 // otherwise load key from database and prompt for password as needed | |
| 375 String password = null; | |
| 376 | |
| 377 if (pubkey.isEncrypted()) { | |
| 378 password = bridge.getPromptHelper().requestPasswordPrompt(null, | |
| 379 manager.res.getString(R.string.prompt_pubkey_password, pubkey.getNickname())); | |
| 380 | |
| 381 // Something must have interrupted the prompt. | |
| 382 if (password == null) | |
| 383 return false; | |
| 384 } | |
| 385 | |
| 386 if (PubkeyDatabase.KEY_TYPE_IMPORTED.equals(pubkey.getType())) { | |
| 387 // load specific key using pem format | |
| 388 pair = PEMDecoder.decode(new String(pubkey.getPrivateKey()).toCharArray(), password); | |
| 389 } | |
| 390 else { | |
| 391 // load using internal generated format | |
| 392 PrivateKey privKey; | |
| 393 | |
| 394 try { | |
| 395 privKey = PubkeyUtils.decodePrivate(pubkey.getPrivateKey(), | |
| 396 pubkey.getType(), password); | |
| 397 } | |
| 398 catch (Exception e) { | |
| 399 String message = String.format("Bad password for key '%s'. Authentication failed.", pubkey.getNickname()); | |
| 400 Log.e(TAG, message, e); | |
| 401 bridge.outputLine(message); | |
| 402 return false; | |
| 403 } | |
| 404 | |
| 405 PublicKey pubKey = PubkeyUtils.decodePublic(pubkey.getPublicKey(), pubkey.getType()); | |
| 406 // convert key to trilead format | |
| 407 pair = new KeyPair(pubKey, privKey); | |
| 408 Log.d(TAG, "Unlocked key " + PubkeyUtils.formatKey(pubKey)); | |
| 409 } | |
| 410 | |
| 411 Log.d(TAG, String.format("Unlocked key '%s'", pubkey.getNickname())); | |
| 412 // save this key in memory | |
| 413 manager.addKey(pubkey, pair); | |
| 414 } | |
| 415 | |
| 416 return tryPublicKey(host.getUsername(), pubkey.getNickname(), pair); | |
| 417 } | |
| 418 | |
|
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419 |
| 0 | 420 private boolean tryPublicKey(String username, String keyNickname, KeyPair pair) throws IOException { |
| 421 //bridge.outputLine(String.format("Attempting 'publickey' with key '%s' [%s]...", keyNickname, trileadKey.toString())); | |
| 422 boolean success = connection.authenticateWithPublicKey(username, pair); | |
| 423 | |
| 424 if (!success) | |
| 425 bridge.outputLine(manager.res.getString(R.string.terminal_auth_pubkey_fail, keyNickname)); | |
| 426 | |
| 427 return success; | |
| 428 } | |
| 429 | |
|
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430 |
| 0 | 431 /** |
| 432 * Internal method to request actual PTY terminal once we've finished | |
| 433 * authentication. If called before authenticated, it will just fail. | |
| 434 */ | |
| 435 private void finishConnection() { | |
| 436 authenticated = true; | |
| 437 | |
| 438 for (PortForwardBean portForward : portForwards) { | |
| 439 try { | |
| 440 enablePortForward(portForward); | |
| 441 bridge.outputLine(manager.res.getString(R.string.terminal_enable_portfoward, portForward.getDescription())); | |
| 442 } | |
| 443 catch (Exception e) { | |
| 444 Log.e(TAG, "Error setting up port forward during connect", e); | |
| 445 } | |
| 446 } | |
| 447 | |
| 448 if (!host.getWantSession()) { | |
| 449 bridge.outputLine(manager.res.getString(R.string.terminal_no_session)); | |
| 450 bridge.onConnected(); | |
| 451 return; | |
| 452 } | |
| 453 | |
| 454 try { | |
| 455 session = connection.openSession(); | |
| 456 | |
| 457 if (!useAuthAgent.equals(HostDatabase.AUTHAGENT_NO)) | |
| 458 session.requestAuthAgentForwarding(this); | |
| 459 | |
| 460 if (host.getWantX11Forward()) { | |
| 461 try { | |
| 462 session.requestX11Forwarding(host.getX11Host(), host.getX11Port(), null, false); | |
| 463 } | |
| 464 catch (IOException e2) { | |
| 465 Log.e(TAG, "Problem while trying to setup X11 forwarding in finishConnection()", e2); | |
| 466 } | |
| 467 } | |
| 468 | |
| 469 session.requestPTY(getEmulation(), columns, rows, width, height, null); | |
| 470 session.startShell(); | |
| 471 stdin = session.getStdin(); | |
| 472 stdout = session.getStdout(); | |
| 473 stderr = session.getStderr(); | |
| 474 sessionOpen = true; | |
| 475 bridge.onConnected(); | |
| 476 } | |
| 477 catch (IOException e1) { | |
| 478 Log.e(TAG, "Problem while trying to create PTY in finishConnection()", e1); | |
| 479 } | |
| 480 } | |
| 481 | |
|
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482 |
| 0 | 483 @Override |
| 484 public void connect() { | |
| 485 connection = new Connection(host.getHostname(), host.getPort()); | |
| 486 connection.addConnectionMonitor(this); | |
| 487 | |
| 488 try { | |
| 489 connection.setCompression(compression); | |
| 490 } | |
| 491 catch (IOException e) { | |
| 492 Log.e(TAG, "Could not enable compression!", e); | |
| 493 } | |
| 494 | |
| 495 if (httpproxy != null && httpproxy.length() > 0) { | |
| 496 Log.d(TAG, "Want HTTP Proxy: " + httpproxy, null); | |
| 497 | |
| 498 try { | |
| 499 URL u; | |
| 500 | |
| 501 if (httpproxy.startsWith("http://")) { | |
| 502 u = new URL(httpproxy); | |
| 503 } | |
| 504 else { | |
| 505 u = new URL("http://" + httpproxy); | |
| 506 } | |
| 507 | |
| 508 connection.setProxyData(new HTTPProxyData( | |
| 509 u.getHost(), | |
| 510 u.getPort(), | |
| 511 u.getUserInfo(), | |
| 512 u.getAuthority())); | |
| 513 bridge.outputLine("Connecting via proxy: " + httpproxy); | |
| 514 } | |
| 515 catch (MalformedURLException e) { | |
| 516 Log.e(TAG, "Could not parse proxy " + httpproxy, e); | |
| 517 // Display the reason in the text. | |
| 518 bridge.outputLine("Bad proxy URL: " + httpproxy); | |
| 519 onDisconnect(); | |
| 520 return; | |
| 521 } | |
| 522 } | |
| 523 | |
| 524 try { | |
| 525 /* Uncomment when debugging SSH protocol: | |
| 526 DebugLogger logger = new DebugLogger() { | |
| 527 | |
| 528 public void log(int level, String className, String message) { | |
| 529 Log.d("SSH", message); | |
| 530 } | |
| 531 | |
| 532 }; | |
| 533 Logger.enabled = true; | |
| 534 Logger.logger = logger; | |
| 535 */ | |
| 536 connectionInfo = connection.connect(new HostKeyVerifier()); | |
| 537 connected = true; | |
| 538 | |
| 539 if (connectionInfo.clientToServerCryptoAlgorithm | |
| 540 .equals(connectionInfo.serverToClientCryptoAlgorithm) | |
| 541 && connectionInfo.clientToServerMACAlgorithm | |
| 542 .equals(connectionInfo.serverToClientMACAlgorithm)) { | |
| 543 bridge.outputLine(manager.res.getString(R.string.terminal_using_algorithm, | |
| 544 connectionInfo.clientToServerCryptoAlgorithm, | |
| 545 connectionInfo.clientToServerMACAlgorithm)); | |
| 546 } | |
| 547 else { | |
| 548 bridge.outputLine(manager.res.getString( | |
| 549 R.string.terminal_using_c2s_algorithm, | |
| 550 connectionInfo.clientToServerCryptoAlgorithm, | |
| 551 connectionInfo.clientToServerMACAlgorithm)); | |
| 552 bridge.outputLine(manager.res.getString( | |
| 553 R.string.terminal_using_s2c_algorithm, | |
| 554 connectionInfo.serverToClientCryptoAlgorithm, | |
| 555 connectionInfo.serverToClientMACAlgorithm)); | |
| 556 } | |
| 557 } | |
| 558 catch (HTTPProxyException e) { | |
| 559 Log.e(TAG, "Failed to connect to HTTP Proxy", e); | |
| 560 // Display the reason in the text. | |
| 561 bridge.outputLine("Failed to connect to HTTP Proxy."); | |
| 562 onDisconnect(); | |
| 563 return; | |
| 564 } | |
| 565 catch (IOException e) { | |
| 566 Log.e(TAG, "Problem in SSH connection thread during authentication", e); | |
| 567 // Display the reason in the text. | |
| 568 bridge.outputLine(e.getCause().getMessage()); | |
| 569 onDisconnect(); | |
| 570 return; | |
| 571 } | |
| 572 | |
| 573 try { | |
| 574 // enter a loop to keep trying until authentication | |
| 575 int tries = 0; | |
| 576 | |
| 577 while (connected && !connection.isAuthenticationComplete() && tries++ < AUTH_TRIES) { | |
| 578 authenticate(); | |
| 579 // sleep to make sure we dont kill system | |
| 580 Thread.sleep(1000); | |
| 581 } | |
| 582 } | |
| 583 catch (Exception e) { | |
| 584 Log.e(TAG, "Problem in SSH connection thread during authentication", e); | |
| 585 } | |
| 586 } | |
| 587 | |
| 588 | |
| 589 @Override | |
| 590 public boolean willBlock() { | |
| 591 if (stdout == null) return true; | |
|
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592 |
| 0 | 593 try { |
| 594 return stdout.available() == 0; | |
|
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595 } |
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596 catch (Exception e) { |
| 0 | 597 return true; |
| 598 } | |
| 599 } | |
| 600 | |
|
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601 |
| 0 | 602 @Override |
| 603 public int read(byte[] buffer, int start, int len) throws IOException { | |
| 604 int bytesRead = 0; | |
| 605 | |
| 606 if (session == null) | |
| 607 return 0; | |
| 608 | |
| 609 int newConditions = session.waitForCondition(conditions, 0); | |
| 610 | |
| 611 if ((newConditions & ChannelCondition.STDOUT_DATA) != 0) { | |
| 612 bytesRead = stdout.read(buffer, start, len); | |
| 613 } | |
| 614 | |
| 615 if ((newConditions & ChannelCondition.STDERR_DATA) != 0) { | |
| 616 byte discard[] = new byte[256]; | |
| 617 | |
| 618 while (stderr.available() > 0) { | |
| 619 stderr.read(discard); | |
| 620 } | |
| 621 } | |
| 622 | |
| 623 if ((newConditions & ChannelCondition.EOF) != 0) { | |
| 624 onDisconnect(); | |
| 625 throw new IOException("Remote end closed connection"); | |
| 626 } | |
| 627 | |
| 628 return bytesRead; | |
| 629 } | |
| 630 | |
|
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631 |
| 0 | 632 @Override |
| 633 public void write(byte[] buffer) throws IOException { | |
| 634 if (stdin != null) | |
| 635 stdin.write(buffer); | |
| 636 } | |
| 637 | |
|
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638 |
| 0 | 639 @Override |
| 640 public void write(int c) throws IOException { | |
| 641 if (stdin != null) | |
| 642 stdin.write(c); | |
| 643 } | |
| 644 | |
|
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645 |
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646 @Override |
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647 public void flush() throws IOException { |
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648 if (stdin != null) |
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649 stdin.flush(); |
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650 } |
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651 |
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652 |
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653 public void connectionLost(Throwable reason) { |
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654 onDisconnect(); |
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655 } |
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656 |
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657 |
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658 private void onDisconnect() { |
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659 close(); |
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660 bridge.dispatchDisconnect(false); |
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661 } |
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662 |
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663 |
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664 @Override |
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665 public void close() { |
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666 connected = false; |
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667 |
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668 if (session != null) { |
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669 session.close(); |
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670 session = null; |
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671 } |
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672 |
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673 if (connection != null) { |
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674 connection.close(); |
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675 connection = null; |
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676 } |
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677 } |
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678 |
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679 |
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680 @Override |
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681 public void setDimensions(int columns, int rows, int width, int height) { |
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682 this.columns = columns; |
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683 this.rows = rows; |
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684 |
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685 if (sessionOpen) { |
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686 try { |
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687 session.resizePTY(columns, rows, width, height); |
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688 } |
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689 catch (IOException e) { |
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690 Log.e(TAG, "Couldn't send resize PTY packet", e); |
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691 } |
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692 } |
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693 } |
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694 |
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695 |
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696 @Override |
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697 public void setOptions(Map<String, String> options) { |
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698 if (options.containsKey("compression")) |
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699 compression = Boolean.parseBoolean(options.get("compression")); |
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700 |
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701 if (options.containsKey("httpproxy")) |
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702 httpproxy = options.get("httpproxy"); |
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703 } |
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704 |
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705 |
| 0 | 706 @Override |
| 707 public Map<String, String> getOptions() { | |
| 708 Map<String, String> options = new HashMap<String, String>(); | |
| 709 options.put("compression", Boolean.toString(compression)); | |
| 710 | |
| 711 if (httpproxy != null) | |
| 712 options.put("httpproxy", httpproxy); | |
| 713 | |
| 714 return options; | |
| 715 } | |
| 716 | |
|
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717 |
| 0 | 718 @Override |
|
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719 public void setCompression(boolean compression) { |
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720 this.compression = compression; |
| 0 | 721 } |
| 722 | |
| 723 | |
| 724 @Override | |
|
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725 public void setHttpproxy(String httpproxy) { |
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726 this.httpproxy = httpproxy; |
| 0 | 727 } |
| 728 | |
|
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729 |
| 0 | 730 @Override |
|
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731 public void setUseAuthAgent(String useAuthAgent) { |
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732 this.useAuthAgent = useAuthAgent; |
| 0 | 733 } |
| 734 | |
| 735 @Override | |
| 736 public boolean canForwardPorts() { | |
| 737 return true; | |
| 738 } | |
| 739 | |
| 740 @Override | |
| 741 public List<PortForwardBean> getPortForwards() { | |
| 742 return portForwards; | |
| 743 } | |
| 744 | |
| 745 @Override | |
| 746 public boolean addPortForward(PortForwardBean portForward) { | |
| 747 return portForwards.add(portForward); | |
| 748 } | |
| 749 | |
| 750 @Override | |
| 751 public boolean removePortForward(PortForwardBean portForward) { | |
| 752 // Make sure we don't have a phantom forwarder. | |
| 753 disablePortForward(portForward); | |
| 754 return portForwards.remove(portForward); | |
| 755 } | |
| 756 | |
| 757 @Override | |
| 758 public boolean enablePortForward(PortForwardBean portForward) { | |
| 759 if (!portForwards.contains(portForward)) { | |
| 760 Log.e(TAG, "Attempt to enable port forward not in list"); | |
| 761 return false; | |
| 762 } | |
| 763 | |
| 764 if (!authenticated) | |
| 765 return false; | |
| 766 | |
| 767 if (HostDatabase.PORTFORWARD_LOCAL.equals(portForward.getType())) { | |
| 768 LocalPortForwarder lpf = null; | |
| 769 | |
| 770 try { | |
| 771 lpf = connection.createLocalPortForwarder( | |
| 772 new InetSocketAddress(InetAddress.getLocalHost(), portForward.getSourcePort()), | |
| 773 portForward.getDestAddr(), portForward.getDestPort()); | |
| 774 } | |
| 775 catch (Exception e) { | |
| 776 Log.e(TAG, "Could not create local port forward", e); | |
| 777 return false; | |
| 778 } | |
| 779 | |
| 780 if (lpf == null) { | |
| 781 Log.e(TAG, "returned LocalPortForwarder object is null"); | |
| 782 return false; | |
| 783 } | |
| 784 | |
| 785 portForward.setIdentifier(lpf); | |
| 786 portForward.setEnabled(true); | |
| 787 return true; | |
| 788 } | |
| 789 else if (HostDatabase.PORTFORWARD_REMOTE.equals(portForward.getType())) { | |
| 790 try { | |
| 791 connection.requestRemotePortForwarding("", portForward.getSourcePort(), portForward.getDestAddr(), portForward.getDestPort()); | |
| 792 } | |
| 793 catch (Exception e) { | |
| 794 Log.e(TAG, "Could not create remote port forward", e); | |
| 795 return false; | |
| 796 } | |
| 797 | |
| 798 portForward.setEnabled(true); | |
| 799 return true; | |
| 800 } | |
| 801 else if (HostDatabase.PORTFORWARD_DYNAMIC5.equals(portForward.getType())) { | |
| 802 DynamicPortForwarder dpf = null; | |
| 803 | |
| 804 try { | |
| 805 dpf = connection.createDynamicPortForwarder( | |
| 806 new InetSocketAddress(InetAddress.getLocalHost(), portForward.getSourcePort())); | |
| 807 } | |
| 808 catch (Exception e) { | |
| 809 Log.e(TAG, "Could not create dynamic port forward", e); | |
| 810 return false; | |
| 811 } | |
| 812 | |
| 813 portForward.setIdentifier(dpf); | |
| 814 portForward.setEnabled(true); | |
| 815 return true; | |
| 816 } | |
| 817 else { | |
| 818 // Unsupported type | |
| 819 Log.e(TAG, String.format("attempt to forward unknown type %s", portForward.getType())); | |
| 820 return false; | |
| 821 } | |
| 822 } | |
| 823 | |
| 824 @Override | |
| 825 public boolean disablePortForward(PortForwardBean portForward) { | |
| 826 if (!portForwards.contains(portForward)) { | |
| 827 Log.e(TAG, "Attempt to disable port forward not in list"); | |
| 828 return false; | |
| 829 } | |
| 830 | |
| 831 if (!authenticated) | |
| 832 return false; | |
| 833 | |
| 834 if (HostDatabase.PORTFORWARD_LOCAL.equals(portForward.getType())) { | |
| 835 LocalPortForwarder lpf = null; | |
| 836 lpf = (LocalPortForwarder)portForward.getIdentifier(); | |
| 837 | |
| 838 if (!portForward.isEnabled() || lpf == null) { | |
| 839 Log.d(TAG, String.format("Could not disable %s; it appears to be not enabled or have no handler", portForward.getNickname())); | |
| 840 return false; | |
| 841 } | |
| 842 | |
| 843 portForward.setEnabled(false); | |
| 844 | |
| 845 try { | |
| 846 lpf.close(); | |
| 847 } | |
| 848 catch (IOException e) { | |
| 849 Log.e(TAG, "Could not stop local port forwarder, setting enabled to false", e); | |
| 850 return false; | |
| 851 } | |
| 852 | |
| 853 return true; | |
| 854 } | |
| 855 else if (HostDatabase.PORTFORWARD_REMOTE.equals(portForward.getType())) { | |
| 856 portForward.setEnabled(false); | |
| 857 | |
| 858 try { | |
| 859 connection.cancelRemotePortForwarding(portForward.getSourcePort()); | |
| 860 } | |
| 861 catch (IOException e) { | |
| 862 Log.e(TAG, "Could not stop remote port forwarding, setting enabled to false", e); | |
| 863 return false; | |
| 864 } | |
| 865 | |
| 866 return true; | |
| 867 } | |
| 868 else if (HostDatabase.PORTFORWARD_DYNAMIC5.equals(portForward.getType())) { | |
| 869 DynamicPortForwarder dpf = null; | |
| 870 dpf = (DynamicPortForwarder)portForward.getIdentifier(); | |
| 871 | |
| 872 if (!portForward.isEnabled() || dpf == null) { | |
| 873 Log.d(TAG, String.format("Could not disable %s; it appears to be not enabled or have no handler", portForward.getNickname())); | |
| 874 return false; | |
| 875 } | |
| 876 | |
| 877 portForward.setEnabled(false); | |
| 878 | |
| 879 try { | |
| 880 dpf.close(); | |
| 881 } | |
| 882 catch (IOException e) { | |
| 883 Log.e(TAG, "Could not stop dynamic port forwarder, setting enabled to false", e); | |
| 884 return false; | |
| 885 } | |
| 886 | |
| 887 return true; | |
| 888 } | |
| 889 else { | |
| 890 // Unsupported type | |
| 891 Log.e(TAG, String.format("attempt to forward unknown type %s", portForward.getType())); | |
| 892 return false; | |
| 893 } | |
| 894 } | |
| 895 | |
| 896 @Override | |
| 897 public boolean canTransferFiles() { | |
| 898 return true; | |
| 899 } | |
| 900 | |
| 901 @Override | |
| 902 public boolean downloadFile(String remoteFile, String localFolder) { | |
| 903 try { | |
| 904 SCPClient client = new SCPClient(connection); | |
| 905 | |
| 906 if (localFolder == null || localFolder == "") | |
| 907 localFolder = Environment.getExternalStorageDirectory().getAbsolutePath(); | |
| 908 | |
| 909 File dir = new File(localFolder); | |
| 910 dir.mkdirs(); | |
| 911 client.get(remoteFile, localFolder); | |
| 912 return true; | |
| 913 } | |
| 914 catch (IOException e) { | |
| 915 Log.e(TAG, "Could not download remote file", e); | |
| 916 return false; | |
| 917 } | |
| 918 } | |
| 919 | |
| 920 @Override | |
| 921 public boolean uploadFile(String localFile, String remoteFile, | |
| 922 String remoteFolder, String mode) { | |
| 923 try { | |
| 924 SCPClient client = new SCPClient(connection); | |
| 925 | |
| 926 if (remoteFolder == null) | |
| 927 remoteFolder = ""; | |
| 928 | |
| 929 if (remoteFile == null || remoteFile == "") | |
| 930 client.put(localFile, remoteFolder, mode); | |
| 931 else | |
| 932 client.put(localFile, remoteFile, remoteFolder, mode); | |
| 933 | |
| 934 return true; | |
| 935 } | |
| 936 catch (IOException e) { | |
| 937 Log.e(TAG, "Could not upload local file", e); | |
| 938 return false; | |
| 939 } | |
| 940 } | |
| 941 | |
| 942 | |
| 943 @Override | |
| 944 public int getDefaultPort() { | |
| 945 return DEFAULT_PORT; | |
| 946 } | |
| 947 | |
|
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948 |
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949 @Override |
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950 public boolean isConnected() { |
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951 return connected; |
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952 } |
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953 |
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954 |
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955 @Override |
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956 public boolean isSessionOpen() { |
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957 return sessionOpen; |
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958 } |
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959 |
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960 |
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961 @Override |
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962 public boolean isAuthenticated() { |
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963 return authenticated; |
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964 } |
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965 |
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966 |
| 0 | 967 @Override |
| 968 public String getDefaultNickname(String username, String hostname, int port) { | |
| 969 if (port == DEFAULT_PORT) { | |
| 970 return String.format(Locale.US, "%s@%s", username, hostname); | |
| 971 } | |
| 972 else { | |
| 973 return String.format(Locale.US, "%s@%s:%d", username, hostname, port); | |
| 974 } | |
| 975 } | |
| 976 | |
| 977 | |
|
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978 @Override |
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979 public void getSelectionArgs(Uri uri, Map<String, String> selection) { |
|
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980 selection.put(HostDatabase.FIELD_HOST_PROTOCOL, PROTOCOL); |
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981 selection.put(HostDatabase.FIELD_HOST_NICKNAME, uri.getFragment()); |
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982 selection.put(HostDatabase.FIELD_HOST_HOSTNAME, uri.getHost()); |
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983 int port = uri.getPort(); |
| 0 | 984 |
|
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985 if (port < 0) |
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986 port = DEFAULT_PORT; |
| 0 | 987 |
|
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988 selection.put(HostDatabase.FIELD_HOST_PORT, Integer.toString(port)); |
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989 selection.put(HostDatabase.FIELD_HOST_USERNAME, uri.getUserInfo()); |
| 0 | 990 } |
| 991 | |
| 992 | |
| 993 @Override | |
| 994 public HostBean createHost(Uri uri) { | |
| 995 HostBean host = new HostBean(); | |
| 996 host.setProtocol(PROTOCOL); | |
| 997 host.setHostname(uri.getHost()); | |
| 998 int port = uri.getPort(); | |
| 999 | |
| 1000 if (port < 0) | |
| 1001 port = DEFAULT_PORT; | |
| 1002 | |
| 1003 host.setPort(port); | |
| 1004 host.setUsername(uri.getUserInfo()); | |
| 1005 String nickname = uri.getFragment(); | |
| 1006 | |
| 1007 if (nickname == null || nickname.length() == 0) { | |
| 1008 host.setNickname(getDefaultNickname(host.getUsername(), | |
| 1009 host.getHostname(), host.getPort())); | |
| 1010 } | |
| 1011 else { | |
| 1012 host.setNickname(uri.getFragment()); | |
| 1013 } | |
| 1014 | |
| 1015 return host; | |
| 1016 } | |
| 1017 | |
| 1018 | |
| 12 | 1019 public String getFormatHint(Context context) { |
| 0 | 1020 return String.format("%s@%s:%s", |
| 1021 context.getString(R.string.format_username), | |
| 1022 context.getString(R.string.format_hostname), | |
| 1023 context.getString(R.string.format_port)); | |
| 1024 } | |
| 1025 | |
|
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1026 |
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1027 /** |
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1028 * @return do we use the network |
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1029 */ |
| 0 | 1030 @Override |
|
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1031 public boolean usesNetwork() { |
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1032 return true; |
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1033 } |
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1034 |
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1035 |
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1036 /** |
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1037 * Handle challenges from keyboard-interactive authentication mode. |
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1038 */ |
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1039 public String[] replyToChallenge(String name, String instruction, int numPrompts, String[] prompt, boolean[] echo) { |
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1040 interactiveCanContinue = true; |
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1041 String[] responses = new String[numPrompts]; |
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1042 |
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1043 for (int i = 0; i < numPrompts; i++) { |
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1044 // request response from user for each prompt |
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1045 responses[i] = bridge.promptHelper.requestPasswordPrompt(instruction, prompt[i]); |
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1046 } |
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1047 |
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1048 return responses; |
| 0 | 1049 } |
| 1050 | |
| 1051 public Map<String, byte[]> retrieveIdentities() { | |
| 1052 Map<String, byte[]> pubKeys = new HashMap<String, byte[]> (manager.loadedKeypairs.size()); | |
| 1053 | |
| 1054 for (Entry<String, KeyHolder> entry : manager.loadedKeypairs.entrySet()) { | |
| 1055 KeyPair pair = entry.getValue().pair; | |
| 1056 | |
| 1057 try { | |
| 1058 PrivateKey privKey = pair.getPrivate(); | |
| 1059 | |
| 1060 if (privKey instanceof RSAPrivateKey) { | |
| 1061 RSAPublicKey pubkey = (RSAPublicKey) pair.getPublic(); | |
| 1062 pubKeys.put(entry.getKey(), RSASHA1Verify.encodeSSHRSAPublicKey(pubkey)); | |
| 1063 } | |
| 1064 else if (privKey instanceof DSAPrivateKey) { | |
| 1065 DSAPublicKey pubkey = (DSAPublicKey) pair.getPublic(); | |
| 1066 pubKeys.put(entry.getKey(), DSASHA1Verify.encodeSSHDSAPublicKey(pubkey)); | |
| 1067 } | |
|
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parents:
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1068 else if (privKey instanceof ECPrivateKey) { |
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parents:
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1069 ECPublicKey pubkey = (ECPublicKey) pair.getPublic(); |
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parents:
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1070 pubKeys.put(entry.getKey(), ECDSASHA2Verify.encodeSSHECDSAPublicKey(pubkey)); |
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parents:
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1071 } |
| 0 | 1072 else |
| 1073 continue; | |
| 1074 } | |
| 1075 catch (IOException e) { | |
| 1076 continue; | |
| 1077 } | |
| 1078 } | |
| 1079 | |
| 1080 return pubKeys; | |
| 1081 } | |
| 1082 | |
| 1083 public KeyPair getKeyPair(byte[] publicKey) { | |
| 1084 String nickname = manager.getKeyNickname(publicKey); | |
| 1085 | |
| 1086 if (nickname == null) | |
| 1087 return null; | |
| 1088 | |
| 1089 if (useAuthAgent.equals(HostDatabase.AUTHAGENT_NO)) { | |
| 1090 Log.e(TAG, ""); | |
| 1091 return null; | |
| 1092 } | |
| 1093 else if (useAuthAgent.equals(HostDatabase.AUTHAGENT_CONFIRM) || | |
| 1094 manager.loadedKeypairs.get(nickname).bean.isConfirmUse()) { | |
| 1095 if (!promptForPubkeyUse(nickname)) | |
| 1096 return null; | |
| 1097 } | |
| 1098 | |
| 1099 return manager.getKey(nickname); | |
| 1100 } | |
| 1101 | |
| 1102 private boolean promptForPubkeyUse(String nickname) { | |
| 1103 Boolean result = bridge.promptHelper.requestBooleanPrompt(null, | |
| 1104 manager.res.getString(R.string.prompt_allow_agent_to_use_key, | |
| 1105 nickname)); | |
| 1106 return result; | |
| 1107 } | |
| 1108 | |
| 1109 public boolean addIdentity(KeyPair pair, String comment, boolean confirmUse, int lifetime) { | |
| 1110 PubkeyBean pubkey = new PubkeyBean(); | |
| 1111 // pubkey.setType(PubkeyDatabase.KEY_TYPE_IMPORTED); | |
| 1112 pubkey.setNickname(comment); | |
| 1113 pubkey.setConfirmUse(confirmUse); | |
| 1114 pubkey.setLifetime(lifetime); | |
| 1115 manager.addKey(pubkey, pair); | |
| 1116 return true; | |
| 1117 } | |
| 1118 | |
| 1119 public boolean removeAllIdentities() { | |
| 1120 manager.loadedKeypairs.clear(); | |
| 1121 return true; | |
| 1122 } | |
| 1123 | |
| 1124 public boolean removeIdentity(byte[] publicKey) { | |
| 1125 return manager.removeKey(publicKey); | |
| 1126 } | |
| 1127 | |
| 1128 public boolean isAgentLocked() { | |
| 1129 return agentLockPassphrase != null; | |
| 1130 } | |
| 1131 | |
| 1132 public boolean requestAgentUnlock(String unlockPassphrase) { | |
| 1133 if (agentLockPassphrase == null) | |
| 1134 return false; | |
| 1135 | |
| 1136 if (agentLockPassphrase.equals(unlockPassphrase)) | |
| 1137 agentLockPassphrase = null; | |
| 1138 | |
| 1139 return agentLockPassphrase == null; | |
| 1140 } | |
| 1141 | |
| 1142 public boolean setAgentLock(String lockPassphrase) { | |
| 1143 if (agentLockPassphrase != null) | |
| 1144 return false; | |
| 1145 | |
| 1146 agentLockPassphrase = lockPassphrase; | |
| 1147 return true; | |
| 1148 } | |
| 1149 | |
| 1150 } |