Mercurial > 510Connectbot
annotate app/src/main/java/ch/ethz/ssh2/transport/ClientServerHello.java @ 474:e5f8d879543f
add fg/bg color setting to global:// section of deployment.connections file
author | Carl Byington <carl@five-ten-sg.com> |
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date | Sun, 20 Oct 2019 14:08:00 -0700 |
parents | d29cce60f393 |
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rev | line source |
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1 /* |
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2 * Copyright (c) 2006-2011 Christian Plattner. All rights reserved. |
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3 * Please refer to the LICENSE.txt for licensing details. |
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4 */ |
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5 |
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6 package ch.ethz.ssh2.transport; |
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7 |
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8 import java.io.IOException; |
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9 import java.io.InputStream; |
337 | 10 import java.io.InputStreamReader; |
11 import java.io.LineNumberReader; | |
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12 import java.io.OutputStream; |
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13 |
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14 import ch.ethz.ssh2.util.StringEncoder; |
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15 |
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16 /** |
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17 * @author Christian Plattner |
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18 * @version $Id: ClientServerHello.java 155 2014-04-28 12:01:19Z dkocher@sudo.ch $ |
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19 */ |
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20 public class ClientServerHello { |
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21 private final String client_line; |
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22 private final String server_line; |
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23 |
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24 public final static int readLineRN(InputStream is, byte[] buffer) throws IOException { |
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25 int pos = 0; |
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26 boolean need10 = false; |
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27 int len = 0; |
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28 |
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29 while (true) { |
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30 int c = is.read(); |
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31 |
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32 if (c == -1) |
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33 throw new IOException("Premature connection close"); |
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34 |
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35 buffer[pos++] = (byte) c; |
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36 |
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37 if (c == 13) { |
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38 need10 = true; |
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39 continue; |
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40 } |
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41 |
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42 if (c == 10) |
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43 break; |
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44 |
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45 if (need10 == true) |
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46 throw new IOException("Malformed line sent by the server, the line does not end correctly."); |
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47 |
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48 len++; |
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49 |
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50 if (pos >= buffer.length) |
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51 throw new IOException("The server sent a too long line."); |
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52 } |
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53 |
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54 return len; |
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55 } |
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56 |
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57 private ClientServerHello(String client_line, String server_line) { |
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58 this.client_line = client_line; |
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59 this.server_line = server_line; |
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60 } |
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61 |
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62 public static ClientServerHello clientHello(String softwareversion, InputStream bi, OutputStream bo) |
307 | 63 throws IOException { |
273
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64 return exchange(softwareversion, bi, bo, true); |
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65 } |
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66 |
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67 public static ClientServerHello serverHello(String softwareversion, InputStream bi, OutputStream bo) |
307 | 68 throws IOException { |
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69 return exchange(softwareversion, bi, bo, false); |
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70 } |
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71 |
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72 private static ClientServerHello exchange(String softwareversion, InputStream bi, OutputStream bo, boolean clientMode) |
307 | 73 throws IOException { |
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74 String localIdentifier = String.format("SSH-2.0-%s", softwareversion); |
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75 bo.write(StringEncoder.GetBytes(String.format("%s\r\n", localIdentifier))); |
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76 bo.flush(); |
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77 // Expect SSH-protoversion-softwareversion SP comments CR LF |
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78 byte[] serverVersion = new byte[512]; |
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79 String remoteIdentifier = null; |
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80 for (int i = 0; i < 50; i++) { |
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81 int len = readLineRN(bi, serverVersion); |
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82 remoteIdentifier = new String(serverVersion, 0, len, "ISO-8859-1"); |
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83 if (remoteIdentifier.startsWith("SSH-")) break; |
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84 } |
307 | 85 |
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86 if (remoteIdentifier.equals("")) { |
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87 throw new IOException("Premature connection close"); |
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88 } |
307 | 89 |
90 if (!remoteIdentifier.startsWith("SSH-")) { | |
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91 throw new IOException(String.format("Malformed SSH identification %s", remoteIdentifier)); |
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92 } |
307 | 93 |
94 if (!remoteIdentifier.startsWith("SSH-1.99-") | |
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95 && !remoteIdentifier.startsWith("SSH-2.0-")) { |
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96 throw new IOException(String.format("Incompatible remote protocol version %s", remoteIdentifier)); |
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97 } |
307 | 98 |
99 if (clientMode) { | |
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100 return new ClientServerHello(localIdentifier, remoteIdentifier); |
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101 } |
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102 else { |
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103 return new ClientServerHello(remoteIdentifier, localIdentifier); |
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104 } |
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105 } |
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106 |
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107 /** |
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108 * @return Returns the client_versioncomment. |
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109 */ |
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110 public byte[] getClientString() { |
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111 return StringEncoder.GetBytes(client_line); |
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112 } |
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113 |
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114 /** |
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115 * @return Returns the server_versioncomment. |
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116 */ |
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117 public byte[] getServerString() { |
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118 return StringEncoder.GetBytes(server_line); |
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119 } |
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120 } |