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annotate src/ch/ethz/ssh2/transport/ServerKexManager.java @ 304:abad243cb341 ganymed

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add ecdsa key support everywhere
author Carl Byington <carl@five-ten-sg.com>
date Tue, 29 Jul 2014 20:28:01 -0700
parents beaccc9df37b
children d2b303406d63
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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 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.local_ec_key = nextKEXeckey;
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83 kxs.dhgexParameters = nextKEXdhgexParameters;
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84 kip = new PacketKexInit(nextKEXcryptoWishList, rnd);
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85 kxs.localKEX = kip;
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86 tm.sendKexMessage(kip.getPayload());
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87 }
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88
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89 kip = new PacketKexInit(msg);
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90 kxs.remoteKEX = kip;
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91
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92 kxs.np = mergeKexParameters(kxs.remoteKEX.getKexParameters(), kxs.localKEX.getKexParameters());
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93
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94 if(kxs.remoteKEX.isFirst_kex_packet_follows() && (kxs.np.guessOK == false)) {
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95 // Guess was wrong, we need to ignore the next kex packet.
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96 ignore_next_kex_packet = true;
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97 }
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98
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99 if(kxs.np.kex_algo.equals("diffie-hellman-group1-sha1")
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100 || kxs.np.kex_algo.equals("diffie-hellman-group14-sha1")) {
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101 kxs.dhx = new DhExchange();
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102
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103 if(kxs.np.kex_algo.equals("diffie-hellman-group1-sha1")) {
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104 kxs.dhx.serverInit(1, rnd);
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105 }
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106 else {
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107 kxs.dhx.serverInit(14, rnd);
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108 }
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109
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110 kxs.state = 1;
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111 return;
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112 }
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113
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114 throw new IllegalStateException("Unkown KEX method!");
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115 }
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116
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117 if(msg[0] == Packets.SSH_MSG_NEWKEYS) {
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118 if(km == null) {
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119 throw new IOException("Peer sent SSH_MSG_NEWKEYS, but I have no key material ready!");
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120 }
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121
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122 BlockCipher cbc;
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123 MAC mac;
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124
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125 try {
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126 cbc = BlockCipherFactory.createCipher(kxs.np.enc_algo_client_to_server, false,
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127 km.enc_key_client_to_server, km.initial_iv_client_to_server);
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128
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129 try {
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130 mac = new MAC(kxs.np.mac_algo_client_to_server, km.integrity_key_client_to_server);
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131 }
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132 catch(DigestException e) {
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133 throw new IOException(e);
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134 }
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135
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136 }
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137 catch(IllegalArgumentException e) {
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138 throw new IOException(e);
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139 }
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140
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141 tm.changeRecvCipher(cbc, mac);
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142
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diff changeset
143 ConnectionInfo sci = new ConnectionInfo();
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
144
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
145 kexCount++;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
146
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
147 sci.keyExchangeAlgorithm = kxs.np.kex_algo;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
148 sci.keyExchangeCounter = kexCount;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
149 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
150 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
151 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
152 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
153 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
154 sci.serverHostKey = kxs.remote_hostkey;
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 synchronized(accessLock) {
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
157 lastConnInfo = sci;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
158 accessLock.notifyAll();
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 kxs = null;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
162 return;
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
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
165 if((kxs == null) || (kxs.state == 0)) {
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
166 throw new IOException("Unexpected Kex submessage!");
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
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
169 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
170 || 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
171 if(kxs.state == 1) {
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
172 PacketKexDHInit dhi = new PacketKexDHInit(msg);
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 kxs.dhx.setE(dhi.getE());
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
175
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
176 byte[] hostKey = null;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
177
298
ab3a99f11a36 add ecdsa key support everywhere
Carl Byington <carl@five-ten-sg.com>
parents: 287
diff changeset
178 if (kxs.np.server_host_key_algo.startsWith("ecdsa-sha2-")) {
302
beaccc9df37b add ecdsa key support everywhere
Carl Byington <carl@five-ten-sg.com>
parents: 298
diff changeset
179 hostKey = ECDSASHA2Verify.encodeSSHECDSAPublicKey((ECPublicKey)kxs.local_ec_key.getPublic());
298
ab3a99f11a36 add ecdsa key support everywhere
Carl Byington <carl@five-ten-sg.com>
parents: 287
diff changeset
180 }
ab3a99f11a36 add ecdsa key support everywhere
Carl Byington <carl@five-ten-sg.com>
parents: 287
diff changeset
181
273
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
182 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
183 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
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 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
187 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
188 }
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 try {
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
191 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
192 kxs.remoteKEX.getPayload(), kxs.localKEX.getPayload(), hostKey);
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 catch(IllegalArgumentException e) {
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
195 throw new IOException("KEX error.", e);
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
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
198 kxs.K = kxs.dhx.getK();
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 byte[] signature = null;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
201
298
ab3a99f11a36 add ecdsa key support everywhere
Carl Byington <carl@five-ten-sg.com>
parents: 287
diff changeset
202 if (kxs.np.server_host_key_algo.startsWith("ecdsa-sha2-")) {
302
beaccc9df37b add ecdsa key support everywhere
Carl Byington <carl@five-ten-sg.com>
parents: 298
diff changeset
203 ECPrivateKey pk = (ECPrivateKey)kxs.local_ec_key.getPrivate();
beaccc9df37b add ecdsa key support everywhere
Carl Byington <carl@five-ten-sg.com>
parents: 298
diff changeset
204 byte[] es = ECDSASHA2Verify.generateSignature(kxs.H, pk);
beaccc9df37b add ecdsa key support everywhere
Carl Byington <carl@five-ten-sg.com>
parents: 298
diff changeset
205 signature = ECDSASHA2Verify.encodeSSHECDSASignature(es, pk.getParams());
298
ab3a99f11a36 add ecdsa key support everywhere
Carl Byington <carl@five-ten-sg.com>
parents: 287
diff changeset
206 }
ab3a99f11a36 add ecdsa key support everywhere
Carl Byington <carl@five-ten-sg.com>
parents: 287
diff changeset
207
ab3a99f11a36 add ecdsa key support everywhere
Carl Byington <carl@five-ten-sg.com>
parents: 287
diff changeset
208 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
209 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
210 signature = RSASHA1Verify.encodeSSHRSASignature(rs);
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
211 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
212
298
ab3a99f11a36 add ecdsa key support everywhere
Carl Byington <carl@five-ten-sg.com>
parents: 287
diff changeset
213 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
214 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
215 signature = DSASHA1Verify.encodeSSHDSASignature(ds);
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 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
219 tm.sendKexMessage(dhr.getPayload());
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 finishKex(false);
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
222 kxs.state = -1;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
223
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
224 if(authenticationStarted == false) {
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
225 authenticationStarted = true;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
226 state.am = new ServerAuthenticationManager(state);
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
227 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
228
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
229 return;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
230 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
231 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
232 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
233 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
234 }