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annotate src/ch/ethz/ssh2/transport/ServerKexManager.java @ 291:9c202256d102 ganymed

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start conversion from trilead to ganymed
author Carl Byington <carl@five-ten-sg.com>
date Fri, 18 Jul 2014 20:35:20 -0700
parents db9b028016de
children ab3a99f11a36
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rev   line source
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1 /*
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Carl Byington <carl@five-ten-sg.com>
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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 import java.security.KeyPair;
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10 import java.security.PublicKey;
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11 import java.security.SecureRandom;
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12 import java.security.interfaces.DSAPrivateKey;
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13 import java.security.interfaces.DSAPublicKey;
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14 import java.security.interfaces.ECPrivateKey;
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15 import java.security.interfaces.ECPublicKey;
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16 import java.security.interfaces.RSAPrivateKey;
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17 import java.security.interfaces.RSAPublicKey;
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18 import ch.ethz.ssh2.ConnectionInfo;
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19 import ch.ethz.ssh2.PacketTypeException;
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20 import ch.ethz.ssh2.auth.ServerAuthenticationManager;
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21 import ch.ethz.ssh2.crypto.cipher.BlockCipher;
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22 import ch.ethz.ssh2.crypto.cipher.BlockCipherFactory;
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23 import ch.ethz.ssh2.crypto.dh.DhExchange;
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24 import ch.ethz.ssh2.crypto.digest.MAC;
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25 import ch.ethz.ssh2.packets.PacketKexDHInit;
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26 import ch.ethz.ssh2.packets.PacketKexDHReply;
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27 import ch.ethz.ssh2.packets.PacketKexInit;
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28 import ch.ethz.ssh2.packets.Packets;
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29 import ch.ethz.ssh2.server.ServerConnectionState;
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30 import ch.ethz.ssh2.signature.DSASHA1Verify;
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31 import ch.ethz.ssh2.signature.ECDSASHA2Verify;
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32 import ch.ethz.ssh2.signature.RSASHA1Verify;
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33
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34 /**
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35 * @version $Id: ServerKexManager.java 160 2014-05-01 14:30:26Z dkocher@sudo.ch $
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36 */
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37 public class ServerKexManager extends KexManager {
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38
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39 private final ServerConnectionState state;
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40
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41 private boolean authenticationStarted = false;
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42
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43 public ServerKexManager(ServerConnectionState state) {
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44 super(state.tm, state.csh, state.next_cryptoWishList, state.generator);
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45 this.state = state;
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46 }
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47
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48 @Override
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49 public void handleFailure(final IOException failure) {
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50 synchronized(accessLock) {
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51 connectionClosed = true;
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52 accessLock.notifyAll();
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53 }
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54 }
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55
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56 @Override
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57 public void handleMessage(byte[] msg) throws IOException {
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58 PacketKexInit kip;
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59
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60 if((kxs == null) && (msg[0] != Packets.SSH_MSG_KEXINIT)) {
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61 throw new PacketTypeException(msg[0]);
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62 }
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63
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64 if(ignore_next_kex_packet) {
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65 ignore_next_kex_packet = false;
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66 return;
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67 }
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68
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69 if(msg[0] == Packets.SSH_MSG_KEXINIT) {
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70 if((kxs != null) && (kxs.state != 0)) {
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71 throw new PacketTypeException(msg[0]);
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72 }
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73
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74 if(kxs == null) {
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75 /*
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76 * Ah, OK, peer wants to do KEX. Let's be nice and play
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77 * together.
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78 */
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79 kxs = new KexState();
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80 kxs.local_dsa_key = nextKEXdsakey;
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81 kxs.local_rsa_key = nextKEXrsakey;
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82 kxs.dhgexParameters = nextKEXdhgexParameters;
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83 kip = new PacketKexInit(nextKEXcryptoWishList, rnd);
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84 kxs.localKEX = kip;
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85 tm.sendKexMessage(kip.getPayload());
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86 }
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87
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88 kip = new PacketKexInit(msg);
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89 kxs.remoteKEX = kip;
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90
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91 kxs.np = mergeKexParameters(kxs.remoteKEX.getKexParameters(), kxs.localKEX.getKexParameters());
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92
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93 if(kxs.remoteKEX.isFirst_kex_packet_follows() && (kxs.np.guessOK == false)) {
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94 // Guess was wrong, we need to ignore the next kex packet.
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95 ignore_next_kex_packet = true;
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96 }
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97
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98 if(kxs.np.kex_algo.equals("diffie-hellman-group1-sha1")
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99 || kxs.np.kex_algo.equals("diffie-hellman-group14-sha1")) {
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100 kxs.dhx = new DhExchange();
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101
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102 if(kxs.np.kex_algo.equals("diffie-hellman-group1-sha1")) {
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103 kxs.dhx.serverInit(1, rnd);
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104 }
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105 else {
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106 kxs.dhx.serverInit(14, rnd);
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107 }
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108
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109 kxs.state = 1;
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110 return;
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111 }
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112
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113 throw new IllegalStateException("Unkown KEX method!");
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114 }
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115
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116 if(msg[0] == Packets.SSH_MSG_NEWKEYS) {
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117 if(km == null) {
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118 throw new IOException("Peer sent SSH_MSG_NEWKEYS, but I have no key material ready!");
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119 }
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120
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121 BlockCipher cbc;
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122 MAC mac;
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123
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124 try {
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125 cbc = BlockCipherFactory.createCipher(kxs.np.enc_algo_client_to_server, false,
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126 km.enc_key_client_to_server, km.initial_iv_client_to_server);
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127
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128 try {
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129 mac = new MAC(kxs.np.mac_algo_client_to_server, km.integrity_key_client_to_server);
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130 }
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131 catch(DigestException e) {
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132 throw new IOException(e);
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133 }
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134
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135 }
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136 catch(IllegalArgumentException e) {
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137 throw new IOException(e);
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138 }
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139
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140 tm.changeRecvCipher(cbc, mac);
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141
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142 ConnectionInfo sci = new ConnectionInfo();
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143
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
144 kexCount++;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
145
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
146 sci.keyExchangeAlgorithm = kxs.np.kex_algo;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
147 sci.keyExchangeCounter = kexCount;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
148 sci.clientToServerCryptoAlgorithm = kxs.np.enc_algo_client_to_server;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
149 sci.serverToClientCryptoAlgorithm = kxs.np.enc_algo_server_to_client;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
150 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
151 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
152 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
153 sci.serverHostKey = kxs.remote_hostkey;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
154
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
155 synchronized(accessLock) {
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
156 lastConnInfo = sci;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
157 accessLock.notifyAll();
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
158 }
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 kxs = null;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
161 return;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
162 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
163
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
164 if((kxs == null) || (kxs.state == 0)) {
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
165 throw new IOException("Unexpected Kex submessage!");
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
166 }
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 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
169 || 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
170 if(kxs.state == 1) {
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
171 PacketKexDHInit dhi = new PacketKexDHInit(msg);
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 kxs.dhx.setE(dhi.getE());
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
174
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
175 byte[] hostKey = null;
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 if(kxs.np.server_host_key_algo.equals("ssh-rsa")) {
285
486df527ddc5 start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents: 284
diff changeset
178 hostKey = RSASHA1Verify.encodeSSHRSAPublicKey((RSAPublicKey)kxs.local_rsa_key.getPublic());
273
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
179 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
180
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
181 if(kxs.np.server_host_key_algo.equals("ssh-dss")) {
285
486df527ddc5 start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents: 284
diff changeset
182 hostKey = DSASHA1Verify.encodeSSHDSAPublicKey((DSAPublicKey)kxs.local_dsa_key.getPublic());
273
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
183 }
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 try {
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
186 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
187 kxs.remoteKEX.getPayload(), kxs.localKEX.getPayload(), hostKey);
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
188 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
189 catch(IllegalArgumentException e) {
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
190 throw new IOException("KEX error.", e);
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
191 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
192
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
193 kxs.K = kxs.dhx.getK();
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 byte[] signature = null;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
196
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
197 if(kxs.np.server_host_key_algo.equals("ssh-rsa")) {
285
486df527ddc5 start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents: 284
diff changeset
198 byte[] rs = RSASHA1Verify.generateSignature(kxs.H, (RSAPrivateKey)kxs.local_rsa_key.getPrivate());
273
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
199 signature = RSASHA1Verify.encodeSSHRSASignature(rs);
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
200 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
201
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
202 if(kxs.np.server_host_key_algo.equals("ssh-dss")) {
285
486df527ddc5 start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents: 284
diff changeset
203 byte[] ds = DSASHA1Verify.generateSignature(kxs.H, (DSAPrivateKey)kxs.local_dsa_key.getPrivate(), rnd);
273
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
204 signature = DSASHA1Verify.encodeSSHDSASignature(ds);
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
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
207 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
208 tm.sendKexMessage(dhr.getPayload());
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 finishKex(false);
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
211 kxs.state = -1;
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 if(authenticationStarted == false) {
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
214 authenticationStarted = true;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
215 state.am = new ServerAuthenticationManager(state);
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
216 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
217
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
218 return;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
219 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
220 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
221 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
222 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
223 }