Mercurial > 510Connectbot
annotate src/com/five_ten_sg/connectbot/transport/SSH.java @ 31:139394237973 tn5250
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| author | Carl Byington <carl@five-ten-sg.com> |
|---|---|
| date | Tue, 10 Jun 2014 12:00:07 -0700 |
| parents | 6aaefb22d876 |
| children | 77ac18bc1b2f |
| 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 | |
| 62 import com.trilead.ssh2.AuthAgentCallback; | |
| 63 import com.trilead.ssh2.ChannelCondition; | |
| 64 import com.trilead.ssh2.Connection; | |
| 65 import com.trilead.ssh2.ConnectionInfo; | |
| 66 import com.trilead.ssh2.ConnectionMonitor; | |
| 67 import com.trilead.ssh2.DynamicPortForwarder; | |
| 68 import com.trilead.ssh2.InteractiveCallback; | |
| 69 import com.trilead.ssh2.KnownHosts; | |
| 70 import com.trilead.ssh2.LocalPortForwarder; | |
| 71 import com.trilead.ssh2.SCPClient; | |
| 72 import com.trilead.ssh2.ServerHostKeyVerifier; | |
| 73 import com.trilead.ssh2.Session; | |
| 74 import com.trilead.ssh2.HTTPProxyData; | |
| 75 import com.trilead.ssh2.HTTPProxyException; | |
| 76 import com.trilead.ssh2.crypto.PEMDecoder; | |
| 77 import com.trilead.ssh2.signature.DSASHA1Verify; | |
| 78 import com.trilead.ssh2.signature.RSASHA1Verify; | |
| 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; | |
| 589 try { | |
| 590 return stdout.available() == 0; | |
| 591 } catch (Exception e) { | |
| 592 return true; | |
| 593 } | |
| 594 } | |
| 595 | |
|
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596 |
| 0 | 597 @Override |
| 598 public int read(byte[] buffer, int start, int len) throws IOException { | |
| 599 int bytesRead = 0; | |
| 600 | |
| 601 if (session == null) | |
| 602 return 0; | |
| 603 | |
| 604 int newConditions = session.waitForCondition(conditions, 0); | |
| 605 | |
| 606 if ((newConditions & ChannelCondition.STDOUT_DATA) != 0) { | |
| 607 bytesRead = stdout.read(buffer, start, len); | |
| 608 } | |
| 609 | |
| 610 if ((newConditions & ChannelCondition.STDERR_DATA) != 0) { | |
| 611 byte discard[] = new byte[256]; | |
| 612 | |
| 613 while (stderr.available() > 0) { | |
| 614 stderr.read(discard); | |
| 615 } | |
| 616 } | |
| 617 | |
| 618 if ((newConditions & ChannelCondition.EOF) != 0) { | |
| 619 onDisconnect(); | |
| 620 throw new IOException("Remote end closed connection"); | |
| 621 } | |
| 622 | |
| 623 return bytesRead; | |
| 624 } | |
| 625 | |
|
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626 |
| 0 | 627 @Override |
| 628 public void write(byte[] buffer) throws IOException { | |
| 629 if (stdin != null) | |
| 630 stdin.write(buffer); | |
| 631 } | |
| 632 | |
|
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633 |
| 0 | 634 @Override |
| 635 public void write(int c) throws IOException { | |
| 636 if (stdin != null) | |
| 637 stdin.write(c); | |
| 638 } | |
| 639 | |
|
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640 |
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641 @Override |
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642 public void flush() throws IOException { |
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643 if (stdin != null) |
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644 stdin.flush(); |
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645 } |
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646 |
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647 |
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648 public void connectionLost(Throwable reason) { |
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649 onDisconnect(); |
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650 } |
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651 |
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652 |
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653 private void onDisconnect() { |
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654 close(); |
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655 bridge.dispatchDisconnect(false); |
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656 } |
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657 |
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658 |
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659 @Override |
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660 public void close() { |
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661 connected = false; |
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662 |
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663 if (session != null) { |
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664 session.close(); |
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665 session = null; |
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666 } |
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667 |
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668 if (connection != null) { |
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669 connection.close(); |
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670 connection = null; |
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671 } |
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672 } |
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673 |
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674 |
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675 @Override |
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676 public void setDimensions(int columns, int rows, int width, int height) { |
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677 this.columns = columns; |
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678 this.rows = rows; |
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679 |
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680 if (sessionOpen) { |
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681 try { |
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682 session.resizePTY(columns, rows, width, height); |
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683 } |
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684 catch (IOException e) { |
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685 Log.e(TAG, "Couldn't send resize PTY packet", e); |
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686 } |
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687 } |
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688 } |
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689 |
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690 |
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691 @Override |
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692 public void setOptions(Map<String, String> options) { |
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693 if (options.containsKey("compression")) |
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694 compression = Boolean.parseBoolean(options.get("compression")); |
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695 |
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696 if (options.containsKey("httpproxy")) |
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697 httpproxy = options.get("httpproxy"); |
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698 } |
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699 |
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700 |
| 0 | 701 @Override |
| 702 public Map<String, String> getOptions() { | |
| 703 Map<String, String> options = new HashMap<String, String>(); | |
| 704 options.put("compression", Boolean.toString(compression)); | |
| 705 | |
| 706 if (httpproxy != null) | |
| 707 options.put("httpproxy", httpproxy); | |
| 708 | |
| 709 return options; | |
| 710 } | |
| 711 | |
|
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712 |
| 0 | 713 @Override |
|
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714 public void setCompression(boolean compression) { |
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715 this.compression = compression; |
| 0 | 716 } |
| 717 | |
| 718 | |
| 719 @Override | |
|
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720 public void setHttpproxy(String httpproxy) { |
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721 this.httpproxy = httpproxy; |
| 0 | 722 } |
| 723 | |
|
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724 |
| 0 | 725 @Override |
|
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726 public void setUseAuthAgent(String useAuthAgent) { |
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727 this.useAuthAgent = useAuthAgent; |
| 0 | 728 } |
| 729 | |
| 730 @Override | |
| 731 public boolean canForwardPorts() { | |
| 732 return true; | |
| 733 } | |
| 734 | |
| 735 @Override | |
| 736 public List<PortForwardBean> getPortForwards() { | |
| 737 return portForwards; | |
| 738 } | |
| 739 | |
| 740 @Override | |
| 741 public boolean addPortForward(PortForwardBean portForward) { | |
| 742 return portForwards.add(portForward); | |
| 743 } | |
| 744 | |
| 745 @Override | |
| 746 public boolean removePortForward(PortForwardBean portForward) { | |
| 747 // Make sure we don't have a phantom forwarder. | |
| 748 disablePortForward(portForward); | |
| 749 return portForwards.remove(portForward); | |
| 750 } | |
| 751 | |
| 752 @Override | |
| 753 public boolean enablePortForward(PortForwardBean portForward) { | |
| 754 if (!portForwards.contains(portForward)) { | |
| 755 Log.e(TAG, "Attempt to enable port forward not in list"); | |
| 756 return false; | |
| 757 } | |
| 758 | |
| 759 if (!authenticated) | |
| 760 return false; | |
| 761 | |
| 762 if (HostDatabase.PORTFORWARD_LOCAL.equals(portForward.getType())) { | |
| 763 LocalPortForwarder lpf = null; | |
| 764 | |
| 765 try { | |
| 766 lpf = connection.createLocalPortForwarder( | |
| 767 new InetSocketAddress(InetAddress.getLocalHost(), portForward.getSourcePort()), | |
| 768 portForward.getDestAddr(), portForward.getDestPort()); | |
| 769 } | |
| 770 catch (Exception e) { | |
| 771 Log.e(TAG, "Could not create local port forward", e); | |
| 772 return false; | |
| 773 } | |
| 774 | |
| 775 if (lpf == null) { | |
| 776 Log.e(TAG, "returned LocalPortForwarder object is null"); | |
| 777 return false; | |
| 778 } | |
| 779 | |
| 780 portForward.setIdentifier(lpf); | |
| 781 portForward.setEnabled(true); | |
| 782 return true; | |
| 783 } | |
| 784 else if (HostDatabase.PORTFORWARD_REMOTE.equals(portForward.getType())) { | |
| 785 try { | |
| 786 connection.requestRemotePortForwarding("", portForward.getSourcePort(), portForward.getDestAddr(), portForward.getDestPort()); | |
| 787 } | |
| 788 catch (Exception e) { | |
| 789 Log.e(TAG, "Could not create remote port forward", e); | |
| 790 return false; | |
| 791 } | |
| 792 | |
| 793 portForward.setEnabled(true); | |
| 794 return true; | |
| 795 } | |
| 796 else if (HostDatabase.PORTFORWARD_DYNAMIC5.equals(portForward.getType())) { | |
| 797 DynamicPortForwarder dpf = null; | |
| 798 | |
| 799 try { | |
| 800 dpf = connection.createDynamicPortForwarder( | |
| 801 new InetSocketAddress(InetAddress.getLocalHost(), portForward.getSourcePort())); | |
| 802 } | |
| 803 catch (Exception e) { | |
| 804 Log.e(TAG, "Could not create dynamic port forward", e); | |
| 805 return false; | |
| 806 } | |
| 807 | |
| 808 portForward.setIdentifier(dpf); | |
| 809 portForward.setEnabled(true); | |
| 810 return true; | |
| 811 } | |
| 812 else { | |
| 813 // Unsupported type | |
| 814 Log.e(TAG, String.format("attempt to forward unknown type %s", portForward.getType())); | |
| 815 return false; | |
| 816 } | |
| 817 } | |
| 818 | |
| 819 @Override | |
| 820 public boolean disablePortForward(PortForwardBean portForward) { | |
| 821 if (!portForwards.contains(portForward)) { | |
| 822 Log.e(TAG, "Attempt to disable port forward not in list"); | |
| 823 return false; | |
| 824 } | |
| 825 | |
| 826 if (!authenticated) | |
| 827 return false; | |
| 828 | |
| 829 if (HostDatabase.PORTFORWARD_LOCAL.equals(portForward.getType())) { | |
| 830 LocalPortForwarder lpf = null; | |
| 831 lpf = (LocalPortForwarder)portForward.getIdentifier(); | |
| 832 | |
| 833 if (!portForward.isEnabled() || lpf == null) { | |
| 834 Log.d(TAG, String.format("Could not disable %s; it appears to be not enabled or have no handler", portForward.getNickname())); | |
| 835 return false; | |
| 836 } | |
| 837 | |
| 838 portForward.setEnabled(false); | |
| 839 | |
| 840 try { | |
| 841 lpf.close(); | |
| 842 } | |
| 843 catch (IOException e) { | |
| 844 Log.e(TAG, "Could not stop local port forwarder, setting enabled to false", e); | |
| 845 return false; | |
| 846 } | |
| 847 | |
| 848 return true; | |
| 849 } | |
| 850 else if (HostDatabase.PORTFORWARD_REMOTE.equals(portForward.getType())) { | |
| 851 portForward.setEnabled(false); | |
| 852 | |
| 853 try { | |
| 854 connection.cancelRemotePortForwarding(portForward.getSourcePort()); | |
| 855 } | |
| 856 catch (IOException e) { | |
| 857 Log.e(TAG, "Could not stop remote port forwarding, setting enabled to false", e); | |
| 858 return false; | |
| 859 } | |
| 860 | |
| 861 return true; | |
| 862 } | |
| 863 else if (HostDatabase.PORTFORWARD_DYNAMIC5.equals(portForward.getType())) { | |
| 864 DynamicPortForwarder dpf = null; | |
| 865 dpf = (DynamicPortForwarder)portForward.getIdentifier(); | |
| 866 | |
| 867 if (!portForward.isEnabled() || dpf == null) { | |
| 868 Log.d(TAG, String.format("Could not disable %s; it appears to be not enabled or have no handler", portForward.getNickname())); | |
| 869 return false; | |
| 870 } | |
| 871 | |
| 872 portForward.setEnabled(false); | |
| 873 | |
| 874 try { | |
| 875 dpf.close(); | |
| 876 } | |
| 877 catch (IOException e) { | |
| 878 Log.e(TAG, "Could not stop dynamic port forwarder, setting enabled to false", e); | |
| 879 return false; | |
| 880 } | |
| 881 | |
| 882 return true; | |
| 883 } | |
| 884 else { | |
| 885 // Unsupported type | |
| 886 Log.e(TAG, String.format("attempt to forward unknown type %s", portForward.getType())); | |
| 887 return false; | |
| 888 } | |
| 889 } | |
| 890 | |
| 891 @Override | |
| 892 public boolean canTransferFiles() { | |
| 893 return true; | |
| 894 } | |
| 895 | |
| 896 @Override | |
| 897 public boolean downloadFile(String remoteFile, String localFolder) { | |
| 898 try { | |
| 899 SCPClient client = new SCPClient(connection); | |
| 900 | |
| 901 if (localFolder == null || localFolder == "") | |
| 902 localFolder = Environment.getExternalStorageDirectory().getAbsolutePath(); | |
| 903 | |
| 904 File dir = new File(localFolder); | |
| 905 dir.mkdirs(); | |
| 906 client.get(remoteFile, localFolder); | |
| 907 return true; | |
| 908 } | |
| 909 catch (IOException e) { | |
| 910 Log.e(TAG, "Could not download remote file", e); | |
| 911 return false; | |
| 912 } | |
| 913 } | |
| 914 | |
| 915 @Override | |
| 916 public boolean uploadFile(String localFile, String remoteFile, | |
| 917 String remoteFolder, String mode) { | |
| 918 try { | |
| 919 SCPClient client = new SCPClient(connection); | |
| 920 | |
| 921 if (remoteFolder == null) | |
| 922 remoteFolder = ""; | |
| 923 | |
| 924 if (remoteFile == null || remoteFile == "") | |
| 925 client.put(localFile, remoteFolder, mode); | |
| 926 else | |
| 927 client.put(localFile, remoteFile, remoteFolder, mode); | |
| 928 | |
| 929 return true; | |
| 930 } | |
| 931 catch (IOException e) { | |
| 932 Log.e(TAG, "Could not upload local file", e); | |
| 933 return false; | |
| 934 } | |
| 935 } | |
| 936 | |
| 937 | |
| 938 @Override | |
| 939 public int getDefaultPort() { | |
| 940 return DEFAULT_PORT; | |
| 941 } | |
| 942 | |
|
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943 |
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944 @Override |
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945 public boolean isConnected() { |
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946 return connected; |
|
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947 } |
|
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948 |
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949 |
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950 @Override |
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951 public boolean isSessionOpen() { |
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952 return sessionOpen; |
|
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953 } |
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954 |
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955 |
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956 @Override |
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957 public boolean isAuthenticated() { |
|
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958 return authenticated; |
|
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959 } |
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960 |
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|
961 |
| 0 | 962 @Override |
| 963 public String getDefaultNickname(String username, String hostname, int port) { | |
| 964 if (port == DEFAULT_PORT) { | |
| 965 return String.format(Locale.US, "%s@%s", username, hostname); | |
| 966 } | |
| 967 else { | |
| 968 return String.format(Locale.US, "%s@%s:%d", username, hostname, port); | |
| 969 } | |
| 970 } | |
| 971 | |
| 972 | |
|
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973 @Override |
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974 public void getSelectionArgs(Uri uri, Map<String, String> selection) { |
|
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975 selection.put(HostDatabase.FIELD_HOST_PROTOCOL, PROTOCOL); |
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976 selection.put(HostDatabase.FIELD_HOST_NICKNAME, uri.getFragment()); |
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977 selection.put(HostDatabase.FIELD_HOST_HOSTNAME, uri.getHost()); |
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978 int port = uri.getPort(); |
| 0 | 979 |
|
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980 if (port < 0) |
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981 port = DEFAULT_PORT; |
| 0 | 982 |
|
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983 selection.put(HostDatabase.FIELD_HOST_PORT, Integer.toString(port)); |
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984 selection.put(HostDatabase.FIELD_HOST_USERNAME, uri.getUserInfo()); |
| 0 | 985 } |
| 986 | |
| 987 | |
| 988 @Override | |
| 989 public HostBean createHost(Uri uri) { | |
| 990 HostBean host = new HostBean(); | |
| 991 host.setProtocol(PROTOCOL); | |
| 992 host.setHostname(uri.getHost()); | |
| 993 int port = uri.getPort(); | |
| 994 | |
| 995 if (port < 0) | |
| 996 port = DEFAULT_PORT; | |
| 997 | |
| 998 host.setPort(port); | |
| 999 host.setUsername(uri.getUserInfo()); | |
| 1000 String nickname = uri.getFragment(); | |
| 1001 | |
| 1002 if (nickname == null || nickname.length() == 0) { | |
| 1003 host.setNickname(getDefaultNickname(host.getUsername(), | |
| 1004 host.getHostname(), host.getPort())); | |
| 1005 } | |
| 1006 else { | |
| 1007 host.setNickname(uri.getFragment()); | |
| 1008 } | |
| 1009 | |
| 1010 return host; | |
| 1011 } | |
| 1012 | |
| 1013 | |
| 12 | 1014 public String getFormatHint(Context context) { |
| 0 | 1015 return String.format("%s@%s:%s", |
| 1016 context.getString(R.string.format_username), | |
| 1017 context.getString(R.string.format_hostname), | |
| 1018 context.getString(R.string.format_port)); | |
| 1019 } | |
| 1020 | |
|
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1021 |
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1022 /** |
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1023 * @return do we use the network |
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1024 */ |
| 0 | 1025 @Override |
|
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1026 public boolean usesNetwork() { |
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1027 return true; |
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1028 } |
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1029 |
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1030 |
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1031 /** |
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1032 * Handle challenges from keyboard-interactive authentication mode. |
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1033 */ |
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1034 public String[] replyToChallenge(String name, String instruction, int numPrompts, String[] prompt, boolean[] echo) { |
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1035 interactiveCanContinue = true; |
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1036 String[] responses = new String[numPrompts]; |
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1037 |
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1038 for (int i = 0; i < numPrompts; i++) { |
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1039 // request response from user for each prompt |
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1040 responses[i] = bridge.promptHelper.requestPasswordPrompt(instruction, prompt[i]); |
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1041 } |
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1042 |
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1043 return responses; |
| 0 | 1044 } |
| 1045 | |
| 1046 public Map<String, byte[]> retrieveIdentities() { | |
| 1047 Map<String, byte[]> pubKeys = new HashMap<String, byte[]> (manager.loadedKeypairs.size()); | |
| 1048 | |
| 1049 for (Entry<String, KeyHolder> entry : manager.loadedKeypairs.entrySet()) { | |
| 1050 KeyPair pair = entry.getValue().pair; | |
| 1051 | |
| 1052 try { | |
| 1053 PrivateKey privKey = pair.getPrivate(); | |
| 1054 | |
| 1055 if (privKey instanceof RSAPrivateKey) { | |
| 1056 RSAPublicKey pubkey = (RSAPublicKey) pair.getPublic(); | |
| 1057 pubKeys.put(entry.getKey(), RSASHA1Verify.encodeSSHRSAPublicKey(pubkey)); | |
| 1058 } | |
| 1059 else if (privKey instanceof DSAPrivateKey) { | |
| 1060 DSAPublicKey pubkey = (DSAPublicKey) pair.getPublic(); | |
| 1061 pubKeys.put(entry.getKey(), DSASHA1Verify.encodeSSHDSAPublicKey(pubkey)); | |
| 1062 } | |
| 1063 else | |
| 1064 continue; | |
| 1065 } | |
| 1066 catch (IOException e) { | |
| 1067 continue; | |
| 1068 } | |
| 1069 } | |
| 1070 | |
| 1071 return pubKeys; | |
| 1072 } | |
| 1073 | |
| 1074 public KeyPair getKeyPair(byte[] publicKey) { | |
| 1075 String nickname = manager.getKeyNickname(publicKey); | |
| 1076 | |
| 1077 if (nickname == null) | |
| 1078 return null; | |
| 1079 | |
| 1080 if (useAuthAgent.equals(HostDatabase.AUTHAGENT_NO)) { | |
| 1081 Log.e(TAG, ""); | |
| 1082 return null; | |
| 1083 } | |
| 1084 else if (useAuthAgent.equals(HostDatabase.AUTHAGENT_CONFIRM) || | |
| 1085 manager.loadedKeypairs.get(nickname).bean.isConfirmUse()) { | |
| 1086 if (!promptForPubkeyUse(nickname)) | |
| 1087 return null; | |
| 1088 } | |
| 1089 | |
| 1090 return manager.getKey(nickname); | |
| 1091 } | |
| 1092 | |
| 1093 private boolean promptForPubkeyUse(String nickname) { | |
| 1094 Boolean result = bridge.promptHelper.requestBooleanPrompt(null, | |
| 1095 manager.res.getString(R.string.prompt_allow_agent_to_use_key, | |
| 1096 nickname)); | |
| 1097 return result; | |
| 1098 } | |
| 1099 | |
| 1100 public boolean addIdentity(KeyPair pair, String comment, boolean confirmUse, int lifetime) { | |
| 1101 PubkeyBean pubkey = new PubkeyBean(); | |
| 1102 // pubkey.setType(PubkeyDatabase.KEY_TYPE_IMPORTED); | |
| 1103 pubkey.setNickname(comment); | |
| 1104 pubkey.setConfirmUse(confirmUse); | |
| 1105 pubkey.setLifetime(lifetime); | |
| 1106 manager.addKey(pubkey, pair); | |
| 1107 return true; | |
| 1108 } | |
| 1109 | |
| 1110 public boolean removeAllIdentities() { | |
| 1111 manager.loadedKeypairs.clear(); | |
| 1112 return true; | |
| 1113 } | |
| 1114 | |
| 1115 public boolean removeIdentity(byte[] publicKey) { | |
| 1116 return manager.removeKey(publicKey); | |
| 1117 } | |
| 1118 | |
| 1119 public boolean isAgentLocked() { | |
| 1120 return agentLockPassphrase != null; | |
| 1121 } | |
| 1122 | |
| 1123 public boolean requestAgentUnlock(String unlockPassphrase) { | |
| 1124 if (agentLockPassphrase == null) | |
| 1125 return false; | |
| 1126 | |
| 1127 if (agentLockPassphrase.equals(unlockPassphrase)) | |
| 1128 agentLockPassphrase = null; | |
| 1129 | |
| 1130 return agentLockPassphrase == null; | |
| 1131 } | |
| 1132 | |
| 1133 public boolean setAgentLock(String lockPassphrase) { | |
| 1134 if (agentLockPassphrase != null) | |
| 1135 return false; | |
| 1136 | |
| 1137 agentLockPassphrase = lockPassphrase; | |
| 1138 return true; | |
| 1139 } | |
| 1140 | |
| 1141 } |