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annotate src/ch/ethz/ssh2/transport/ServerKexManager.java @ 278:d7e088fa2123 ganymed

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start conversion from trilead to ganymed
author Carl Byington <carl@five-ten-sg.com>
date Fri, 18 Jul 2014 16:45:43 -0700
parents 91a31873c42a
children b4ca341c318d
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
273
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Carl Byington <carl@five-ten-sg.com>
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1 /*
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2 * Copyright (c) 2006-2013 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 package ch.ethz.ssh2.transport;
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6
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7 import java.io.IOException;
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8 import java.security.DigestException;
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9
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10 import ch.ethz.ssh2.ConnectionInfo;
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11 import ch.ethz.ssh2.PacketTypeException;
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12 import ch.ethz.ssh2.auth.ServerAuthenticationManager;
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13 import ch.ethz.ssh2.crypto.cipher.BlockCipher;
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14 import ch.ethz.ssh2.crypto.cipher.BlockCipherFactory;
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15 import ch.ethz.ssh2.crypto.dh.DhExchange;
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16 import ch.ethz.ssh2.crypto.digest.MAC;
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17 import ch.ethz.ssh2.packets.PacketKexDHInit;
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18 import ch.ethz.ssh2.packets.PacketKexDHReply;
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19 import ch.ethz.ssh2.packets.PacketKexInit;
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20 import ch.ethz.ssh2.packets.Packets;
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21 import ch.ethz.ssh2.server.ServerConnectionState;
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22 import ch.ethz.ssh2.signature.DSASHA1Verify;
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23 import ch.ethz.ssh2.signature.DSASignature;
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24 import ch.ethz.ssh2.signature.RSASHA1Verify;
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25 import ch.ethz.ssh2.signature.RSASignature;
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26
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27 /**
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28 * @version $Id: ServerKexManager.java 160 2014-05-01 14:30:26Z dkocher@sudo.ch $
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29 */
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30 public class ServerKexManager extends KexManager {
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31
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32 private final ServerConnectionState state;
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33
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34 private boolean authenticationStarted = false;
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35
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36 public ServerKexManager(ServerConnectionState state) {
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37 super(state.tm, state.csh, state.next_cryptoWishList, state.generator);
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38 this.state = state;
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39 }
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40
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41 @Override
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42 public void handleFailure(final IOException failure) {
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43 synchronized(accessLock) {
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44 connectionClosed = true;
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45 accessLock.notifyAll();
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46 }
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47 }
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48
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49 @Override
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50 public void handleMessage(byte[] msg) throws IOException {
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51 PacketKexInit kip;
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52
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53 if((kxs == null) && (msg[0] != Packets.SSH_MSG_KEXINIT)) {
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54 throw new PacketTypeException(msg[0]);
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55 }
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56
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57 if(ignore_next_kex_packet) {
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58 ignore_next_kex_packet = false;
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59 return;
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60 }
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61
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62 if(msg[0] == Packets.SSH_MSG_KEXINIT) {
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63 if((kxs != null) && (kxs.state != 0)) {
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64 throw new PacketTypeException(msg[0]);
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65 }
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66
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67 if(kxs == null) {
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68 /*
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69 * Ah, OK, peer wants to do KEX. Let's be nice and play
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70 * together.
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71 */
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72 kxs = new KexState();
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73 kxs.local_dsa_key = nextKEXdsakey;
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74 kxs.local_rsa_key = nextKEXrsakey;
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75 kxs.dhgexParameters = nextKEXdhgexParameters;
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76 kip = new PacketKexInit(nextKEXcryptoWishList, rnd);
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77 kxs.localKEX = kip;
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78 tm.sendKexMessage(kip.getPayload());
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79 }
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80
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81 kip = new PacketKexInit(msg);
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82 kxs.remoteKEX = kip;
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83
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84 kxs.np = mergeKexParameters(kxs.remoteKEX.getKexParameters(), kxs.localKEX.getKexParameters());
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85
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86 if(kxs.remoteKEX.isFirst_kex_packet_follows() && (kxs.np.guessOK == false)) {
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87 // Guess was wrong, we need to ignore the next kex packet.
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88 ignore_next_kex_packet = true;
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89 }
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90
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91 if(kxs.np.kex_algo.equals("diffie-hellman-group1-sha1")
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92 || kxs.np.kex_algo.equals("diffie-hellman-group14-sha1")) {
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93 kxs.dhx = new DhExchange();
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94
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95 if(kxs.np.kex_algo.equals("diffie-hellman-group1-sha1")) {
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96 kxs.dhx.serverInit(1, rnd);
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97 }
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98 else {
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99 kxs.dhx.serverInit(14, rnd);
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100 }
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101
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102 kxs.state = 1;
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103 return;
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104 }
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105
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106 throw new IllegalStateException("Unkown KEX method!");
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107 }
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108
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109 if(msg[0] == Packets.SSH_MSG_NEWKEYS) {
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110 if(km == null) {
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111 throw new IOException("Peer sent SSH_MSG_NEWKEYS, but I have no key material ready!");
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112 }
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113
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114 BlockCipher cbc;
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115 MAC mac;
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116
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117 try {
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118 cbc = BlockCipherFactory.createCipher(kxs.np.enc_algo_client_to_server, false,
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119 km.enc_key_client_to_server, km.initial_iv_client_to_server);
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120
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121 try {
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122 mac = new MAC(kxs.np.mac_algo_client_to_server, km.integrity_key_client_to_server);
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123 }
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124 catch(DigestException e) {
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125 throw new IOException(e);
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126 }
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127
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128 }
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129 catch(IllegalArgumentException e) {
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130 throw new IOException(e);
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131 }
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132
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133 tm.changeRecvCipher(cbc, mac);
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134
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135 ConnectionInfo sci = new ConnectionInfo();
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136
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137 kexCount++;
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138
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139 sci.keyExchangeAlgorithm = kxs.np.kex_algo;
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140 sci.keyExchangeCounter = kexCount;
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141 sci.clientToServerCryptoAlgorithm = kxs.np.enc_algo_client_to_server;
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142 sci.serverToClientCryptoAlgorithm = kxs.np.enc_algo_server_to_client;
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diff changeset
143 sci.clientToServerMACAlgorithm = kxs.np.mac_algo_client_to_server;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
144 sci.serverToClientMACAlgorithm = kxs.np.mac_algo_server_to_client;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
145 sci.serverHostKeyAlgorithm = kxs.np.server_host_key_algo;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
146 sci.serverHostKey = kxs.remote_hostkey;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
147
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
148 synchronized(accessLock) {
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
149 lastConnInfo = sci;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
150 accessLock.notifyAll();
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
151 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
152
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
153 kxs = null;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
154 return;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
155 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
156
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
157 if((kxs == null) || (kxs.state == 0)) {
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
158 throw new IOException("Unexpected Kex submessage!");
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
159 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
160
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
161 if(kxs.np.kex_algo.equals("diffie-hellman-group1-sha1")
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
162 || kxs.np.kex_algo.equals("diffie-hellman-group14-sha1")) {
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
163 if(kxs.state == 1) {
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
164 PacketKexDHInit dhi = new PacketKexDHInit(msg);
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
165
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
166 kxs.dhx.setE(dhi.getE());
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
167
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
168 byte[] hostKey = null;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
169
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
170 if(kxs.np.server_host_key_algo.equals("ssh-rsa")) {
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
171 hostKey = RSASHA1Verify.encodeSSHRSAPublicKey(kxs.local_rsa_key.getPublicKey());
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
172 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
173
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
174 if(kxs.np.server_host_key_algo.equals("ssh-dss")) {
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
175 hostKey = DSASHA1Verify.encodeSSHDSAPublicKey(kxs.local_dsa_key.getPublicKey());
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
176 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
177
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
178 try {
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
179 kxs.H = kxs.dhx.calculateH(csh.getClientString(), csh.getServerString(),
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
180 kxs.remoteKEX.getPayload(), kxs.localKEX.getPayload(), hostKey);
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
181 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
182 catch(IllegalArgumentException e) {
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
183 throw new IOException("KEX error.", e);
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
184 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
185
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
186 kxs.K = kxs.dhx.getK();
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
187
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
188 byte[] signature = null;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
189
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
190 if(kxs.np.server_host_key_algo.equals("ssh-rsa")) {
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
191 RSASignature rs = RSASHA1Verify.generateSignature(kxs.H, kxs.local_rsa_key);
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
192 signature = RSASHA1Verify.encodeSSHRSASignature(rs);
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
193 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
194
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
195 if(kxs.np.server_host_key_algo.equals("ssh-dss")) {
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
196 DSASignature ds = DSASHA1Verify.generateSignature(kxs.H, kxs.local_dsa_key, rnd);
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
197 signature = DSASHA1Verify.encodeSSHDSASignature(ds);
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
198 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
199
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
200 PacketKexDHReply dhr = new PacketKexDHReply(hostKey, kxs.dhx.getF(), signature);
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
201 tm.sendKexMessage(dhr.getPayload());
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
202
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
203 finishKex(false);
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
204 kxs.state = -1;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
205
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
206 if(authenticationStarted == false) {
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
207 authenticationStarted = true;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
208 state.am = new ServerAuthenticationManager(state);
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
209 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
210
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
211 return;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
212 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
213 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
214 throw new IllegalStateException(String.format("Unknown KEX method %s", kxs.np.kex_algo));
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
215 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
216 }