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annotate src/ch/ethz/ssh2/transport/ClientKexManager.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 ab3a99f11a36
children d2b303406d63
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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.SecureRandom;
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10
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11 import ch.ethz.ssh2.ConnectionInfo;
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12 import ch.ethz.ssh2.PacketTypeException;
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13 import ch.ethz.ssh2.ServerHostKeyVerifier;
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14 import ch.ethz.ssh2.compression.CompressionFactory;
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15 import ch.ethz.ssh2.compression.Compressor;
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16 import ch.ethz.ssh2.crypto.CryptoWishList;
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17 import ch.ethz.ssh2.crypto.cipher.BlockCipher;
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18 import ch.ethz.ssh2.crypto.cipher.BlockCipherFactory;
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19 import ch.ethz.ssh2.crypto.dh.DhExchange;
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20 import ch.ethz.ssh2.crypto.dh.DhGroupExchange;
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21 import ch.ethz.ssh2.crypto.digest.MAC;
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22 import ch.ethz.ssh2.packets.PacketKexDHInit;
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23 import ch.ethz.ssh2.packets.PacketKexDHReply;
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24 import ch.ethz.ssh2.packets.PacketKexDhGexGroup;
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25 import ch.ethz.ssh2.packets.PacketKexDhGexInit;
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26 import ch.ethz.ssh2.packets.PacketKexDhGexReply;
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27 import ch.ethz.ssh2.packets.PacketKexDhGexRequest;
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28 import ch.ethz.ssh2.packets.PacketKexDhGexRequestOld;
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29 import ch.ethz.ssh2.packets.PacketKexInit;
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30 import ch.ethz.ssh2.packets.Packets;
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31 import java.security.interfaces.DSAPublicKey;
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32 import java.security.interfaces.ECPublicKey;
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33 import java.security.interfaces.RSAPublicKey;
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34 import ch.ethz.ssh2.signature.DSASHA1Verify;
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35 import ch.ethz.ssh2.signature.ECDSASHA2Verify;
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36 import ch.ethz.ssh2.signature.RSASHA1Verify;
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37
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38 /**
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39 * @version $Id: ClientKexManager.java 160 2014-05-01 14:30:26Z dkocher@sudo.ch $
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40 */
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41 public class ClientKexManager extends KexManager {
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42
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43 private final ServerHostKeyVerifier verifier;
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44
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45 private final String hostname;
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46
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47 private final int port;
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48
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49 public ClientKexManager(TransportManager tm, ClientServerHello csh, CryptoWishList initialCwl, String hostname, int port,
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50 ServerHostKeyVerifier keyVerifier, SecureRandom rnd) {
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51 super(tm, csh, initialCwl, rnd);
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52 this.hostname = hostname;
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53 this.port = port;
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54 this.verifier = keyVerifier;
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55 }
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56
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57 protected boolean verifySignature(byte[] sig, byte[] hostkey) throws IOException {
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58 if (kxs.np.server_host_key_algo.startsWith("ecdsa-sha2-")) {
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59 byte[] rs = ECDSASHA2Verify.decodeSSHECDSASignature(sig);
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60 ECPublicKey epk = ECDSASHA2Verify.decodeSSHECDSAPublicKey(hostkey);
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61 log.debug("Verifying ecdsa signature");
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62 return ECDSASHA2Verify.verifySignature(kxs.H, rs, epk);
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63 }
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64
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65 if (kxs.np.server_host_key_algo.equals("ssh-rsa")) {
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66 byte[] rs = RSASHA1Verify.decodeSSHRSASignature(sig);
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67 RSAPublicKey rpk = RSASHA1Verify.decodeSSHRSAPublicKey(hostkey);
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68
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69 log.debug("Verifying ssh-rsa signature");
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70
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71 return RSASHA1Verify.verifySignature(kxs.H, rs, rpk);
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72 }
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73
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74 if (kxs.np.server_host_key_algo.equals("ssh-dss")) {
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75 byte[] ds = DSASHA1Verify.decodeSSHDSASignature(sig);
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76 DSAPublicKey dpk = DSASHA1Verify.decodeSSHDSAPublicKey(hostkey);
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77
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78 log.debug("Verifying ssh-dss signature");
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79
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80 return DSASHA1Verify.verifySignature(kxs.H, ds, dpk);
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81 }
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82
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83 throw new IOException("Unknown server host key algorithm '" + kxs.np.server_host_key_algo + "'");
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84 }
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85
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86 @Override
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87 public void handleFailure(final IOException failure) {
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88 synchronized(accessLock) {
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89 connectionClosed = true;
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90 accessLock.notifyAll();
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91 }
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92 }
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93
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94 @Override
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95 public synchronized void handleMessage(byte[] msg) throws IOException {
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96 PacketKexInit kip;
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97
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98 if((kxs == null) && (msg[0] != Packets.SSH_MSG_KEXINIT)) {
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99 throw new PacketTypeException(msg[0]);
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100 }
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101
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102 if(ignore_next_kex_packet) {
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103 ignore_next_kex_packet = false;
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104 return;
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105 }
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106
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107 if(msg[0] == Packets.SSH_MSG_KEXINIT) {
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108 if((kxs != null) && (kxs.state != 0)) {
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109 throw new PacketTypeException(msg[0]);
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110 }
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111
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112 if(kxs == null) {
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113 /*
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114 * Ah, OK, peer wants to do KEX. Let's be nice and play
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115 * together.
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116 */
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117 kxs = new KexState();
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118 kxs.dhgexParameters = nextKEXdhgexParameters;
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119 kip = new PacketKexInit(nextKEXcryptoWishList, rnd);
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120 kxs.localKEX = kip;
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121 tm.sendKexMessage(kip.getPayload());
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122 }
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123
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124 kip = new PacketKexInit(msg);
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125 kxs.remoteKEX = kip;
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126
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127 kxs.np = mergeKexParameters(kxs.localKEX.getKexParameters(), kxs.remoteKEX.getKexParameters());
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128
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129 if(kxs.remoteKEX.isFirst_kex_packet_follows() && (kxs.np.guessOK == false)) {
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130 // Guess was wrong, we need to ignore the next kex packet.
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131 ignore_next_kex_packet = true;
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132 }
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133
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134 if(kxs.np.kex_algo.equals("diffie-hellman-group-exchange-sha1")) {
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135 if(kxs.dhgexParameters.getMin_group_len() == 0) {
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136 PacketKexDhGexRequestOld dhgexreq = new PacketKexDhGexRequestOld(kxs.dhgexParameters);
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137 tm.sendKexMessage(dhgexreq.getPayload());
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
138
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
139 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
140 else {
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
141 PacketKexDhGexRequest dhgexreq = new PacketKexDhGexRequest(kxs.dhgexParameters);
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
142 tm.sendKexMessage(dhgexreq.getPayload());
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
143 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
144 kxs.state = 1;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
145 return;
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
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
148 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
149 || 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
150 kxs.dhx = new DhExchange();
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 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
153 kxs.dhx.clientInit(1, rnd);
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 else {
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
156 kxs.dhx.clientInit(14, rnd);
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
157 }
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 PacketKexDHInit kp = new PacketKexDHInit(kxs.dhx.getE());
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
160 tm.sendKexMessage(kp.getPayload());
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
161 kxs.state = 1;
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 throw new IllegalStateException("Unkown KEX method!");
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(msg[0] == Packets.SSH_MSG_NEWKEYS) {
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
169 if(km == null) {
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
170 throw new IOException("Peer sent SSH_MSG_NEWKEYS, but I have no key material ready!");
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
171 }
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 BlockCipher cbc;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
174 MAC mac;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
175 Compressor comp;
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 try {
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
178 cbc = BlockCipherFactory.createCipher(kxs.np.enc_algo_server_to_client, false,
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
179 km.enc_key_server_to_client, km.initial_iv_server_to_client);
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 try {
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
182 mac = new MAC(kxs.np.mac_algo_server_to_client, km.integrity_key_server_to_client);
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 catch(DigestException e) {
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
185 throw new IOException(e);
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
186 }
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 comp = CompressionFactory.createCompressor(kxs.np.comp_algo_server_to_client);
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 catch(IllegalArgumentException e) {
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
191 throw new IOException(e.getMessage());
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
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
194 tm.changeRecvCipher(cbc, mac);
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
195 tm.changeRecvCompression(comp);
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 ConnectionInfo sci = new ConnectionInfo();
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 kexCount++;
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 sci.keyExchangeAlgorithm = kxs.np.kex_algo;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
202 sci.keyExchangeCounter = kexCount;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
203 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
204 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
205 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
206 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
207 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
208 sci.serverHostKey = kxs.remote_hostkey;
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 synchronized(accessLock) {
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
211 lastConnInfo = sci;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
212 accessLock.notifyAll();
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
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
215 kxs = null;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
216 return;
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
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
219 if((kxs == null) || (kxs.state == 0)) {
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
220 throw new IOException("Unexpected Kex submessage!");
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
221 }
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 if(kxs.np.kex_algo.equals("diffie-hellman-group-exchange-sha1")) {
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
224 if(kxs.state == 1) {
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
225 PacketKexDhGexGroup dhgexgrp = new PacketKexDhGexGroup(msg);
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
226 kxs.dhgx = new DhGroupExchange(dhgexgrp.getP(), dhgexgrp.getG());
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
227 kxs.dhgx.init(rnd);
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
228 PacketKexDhGexInit dhgexinit = new PacketKexDhGexInit(kxs.dhgx.getE());
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
229 tm.sendKexMessage(dhgexinit.getPayload());
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
230 kxs.state = 2;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
231 return;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
232 }
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 if(kxs.state == 2) {
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
235 PacketKexDhGexReply dhgexrpl = new PacketKexDhGexReply(msg);
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
236
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
237 kxs.remote_hostkey = dhgexrpl.getHostKey();
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
238
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
239 if(verifier != null) {
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
240 try {
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
241 if(!verifier.verifyServerHostKey(hostname, port, kxs.np.server_host_key_algo, kxs.remote_hostkey)) {
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
242 throw new IOException("The server host key was not accepted by the verifier callback");
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
243 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
244 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
245 catch(Exception e) {
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
246 throw new IOException(
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
247 "The server host key was not accepted by the verifier callback.", e);
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
248 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
249 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
250
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
251 kxs.dhgx.setF(dhgexrpl.getF());
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
252
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
253 try {
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
254 kxs.H = kxs.dhgx.calculateH(csh.getClientString(), csh.getServerString(),
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
255 kxs.localKEX.getPayload(), kxs.remoteKEX.getPayload(), dhgexrpl.getHostKey(),
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
256 kxs.dhgexParameters);
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
257 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
258 catch(IllegalArgumentException e) {
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
259 throw new IOException("KEX error.", e);
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
260 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
261 if(!verifySignature(dhgexrpl.getSignature(), kxs.remote_hostkey)) {
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
262 throw new IOException("Invalid remote host key signature");
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
263 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
264 kxs.K = kxs.dhgx.getK();
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
265 finishKex(true);
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
266 kxs.state = -1;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
267 return;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
268 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
269
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
270 throw new IllegalStateException("Illegal State in KEX Exchange!");
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
271 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
272
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
273 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
274 || 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
275 if(kxs.state == 1) {
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
276
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
277 PacketKexDHReply dhr = new PacketKexDHReply(msg);
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
278
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
279 kxs.remote_hostkey = dhr.getHostKey();
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
280
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
281 if(verifier != null) {
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
282 try {
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
283 if(!verifier.verifyServerHostKey(hostname, port, kxs.np.server_host_key_algo, kxs.remote_hostkey)) {
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
284 throw new IOException("The server host key was not accepted by the verifier callback");
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
285 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
286 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
287 catch(Exception e) {
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
288 throw new IOException("The server host key was not accepted by the verifier callback", e);
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
289 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
290 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
291 kxs.dhx.setF(dhr.getF());
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
292 try {
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
293 kxs.H = kxs.dhx.calculateH(csh.getClientString(), csh.getServerString(), kxs.localKEX.getPayload(),
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
294 kxs.remoteKEX.getPayload(), dhr.getHostKey());
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
295 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
296 catch(IllegalArgumentException e) {
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
297 throw new IOException("KEX error.", e);
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
298 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
299 if(!verifySignature(dhr.getSignature(), kxs.remote_hostkey)) {
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
300 throw new IOException("Invalid remote host key signature");
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
301 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
302 kxs.K = kxs.dhx.getK();
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
303 finishKex(true);
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
304 kxs.state = -1;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
305 return;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
306 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
307 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
308 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
309 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
310 }