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annotate src/ch/ethz/ssh2/auth/ServerAuthenticationManager.java @ 273:91a31873c42a ganymed

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start conversion from trilead to ganymed
author Carl Byington <carl@five-ten-sg.com>
date Fri, 18 Jul 2014 11:21:46 -0700
parents
children d2b303406d63
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rev   line source
273
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1
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2 package ch.ethz.ssh2.auth;
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3
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4 import java.io.IOException;
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5 import java.util.Arrays;
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6 import java.util.HashSet;
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7 import java.util.Set;
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8
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9 import ch.ethz.ssh2.AuthenticationResult;
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10 import ch.ethz.ssh2.PacketTypeException;
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11 import ch.ethz.ssh2.ServerAuthenticationCallback;
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12 import ch.ethz.ssh2.channel.ChannelManager;
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13 import ch.ethz.ssh2.packets.PacketServiceAccept;
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14 import ch.ethz.ssh2.packets.PacketServiceRequest;
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15 import ch.ethz.ssh2.packets.PacketUserauthBanner;
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16 import ch.ethz.ssh2.packets.PacketUserauthFailure;
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17 import ch.ethz.ssh2.packets.PacketUserauthSuccess;
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18 import ch.ethz.ssh2.packets.Packets;
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19 import ch.ethz.ssh2.packets.TypesReader;
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20 import ch.ethz.ssh2.server.ServerConnectionState;
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21 import ch.ethz.ssh2.transport.MessageHandler;
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22
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23 public class ServerAuthenticationManager implements MessageHandler {
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24 private final ServerConnectionState state;
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25
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26 public ServerAuthenticationManager(ServerConnectionState state) {
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27 this.state = state;
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28 state.tm.registerMessageHandler(this, 0, 255);
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29 }
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30
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31 private void sendresult(AuthenticationResult result) throws IOException {
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32 if(AuthenticationResult.SUCCESS == result) {
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33 PacketUserauthSuccess pus = new PacketUserauthSuccess();
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34 state.tm.sendAsynchronousMessage(pus.getPayload());
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35
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36 state.tm.removeMessageHandler(this);
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37 state.tm.registerMessageHandler(this, 50, 79);
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38
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39 state.cm = new ChannelManager(state);
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40
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41 state.flag_auth_completed = true;
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42
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43 }
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44 else {
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45 Set<String> remaining_methods = new HashSet<String>();
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46
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47 if(state.cb_auth != null) {
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48 remaining_methods.addAll(Arrays.asList(
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49 state.cb_auth.getRemainingAuthMethods(state.conn)));
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50 }
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51 PacketUserauthFailure puf = new PacketUserauthFailure(remaining_methods,
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52 AuthenticationResult.PARTIAL_SUCCESS == result);
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53 state.tm.sendAsynchronousMessage(puf.getPayload());
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54 }
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55 }
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56
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57 @Override
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58 public void handleFailure(final IOException failure) {
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59 //
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60 }
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61
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62 @Override
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63 public void handleMessage(byte[] msg) throws IOException {
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64 /* Ignore all authentication messages after successful auth */
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65
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66 if(state.flag_auth_completed) {
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67 return;
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68 }
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69
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70 if(!state.flag_auth_serviceRequested) {
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71 /* Must be PacketServiceRequest */
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72
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73 PacketServiceRequest psr = new PacketServiceRequest(msg);
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74
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75 if(!"ssh-userauth".equals(psr.getServiceName())) {
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76 throw new IOException("SSH protocol error, expected ssh-userauth service request");
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77 }
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78
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79 PacketServiceAccept psa = new PacketServiceAccept("ssh-userauth");
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80 state.tm.sendAsynchronousMessage(psa.getPayload());
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81
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82 String banner = state.cb_auth.initAuthentication(state.conn);
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83
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84 if(banner != null) {
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85 PacketUserauthBanner pub = new PacketUserauthBanner(banner);
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86 state.tm.sendAsynchronousMessage(pub.getPayload());
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87 }
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88
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89 state.flag_auth_serviceRequested = true;
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90
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91 return;
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92 }
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93
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94 ServerAuthenticationCallback cb = state.cb_auth;
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95
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96 TypesReader tr = new TypesReader(msg);
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97 int packet_type = tr.readByte();
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98
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99 if(packet_type == Packets.SSH_MSG_USERAUTH_REQUEST) {
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100 String username = tr.readString("UTF-8");
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101 String service = tr.readString();
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102 String method = tr.readString();
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103
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104 if(!"ssh-connection".equals(service)) {
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105 sendresult(AuthenticationResult.FAILURE);
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106 return;
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107 }
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108
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109 if("none".equals(method)) {
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110 if(cb != null) {
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111 sendresult(cb.authenticateWithNone(state.conn, username));
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112 return;
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113 }
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114 }
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115
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116 if("password".equals(method)) {
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117 boolean flag_change_pass = tr.readBoolean();
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118
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119 if(flag_change_pass) {
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120 sendresult(AuthenticationResult.FAILURE);
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121 return;
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122 }
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123
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124 String password = tr.readString("UTF-8");
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125
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126 if(cb != null) {
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127 sendresult(cb.authenticateWithPassword(state.conn, username, password));
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128 return;
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129 }
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130 }
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131
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132 sendresult(AuthenticationResult.FAILURE);
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133 return;
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134 }
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135 throw new PacketTypeException(packet_type);
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136 }
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137 }