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annotate app/src/main/java/ch/ethz/ssh2/transport/ServerKexManager.java @ 500:11d714165a2d

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updates for android10+
author Carl Byington <carl@five-ten-sg.com>
date Tue, 07 Jun 2022 16:10:58 -0700
parents d29cce60f393
children
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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.interfaces.DSAPrivateKey;
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10 import java.security.interfaces.DSAPublicKey;
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11 import java.security.interfaces.ECPrivateKey;
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12 import java.security.interfaces.ECPublicKey;
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13 import java.security.interfaces.RSAPrivateKey;
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14 import java.security.interfaces.RSAPublicKey;
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15 import java.math.BigInteger;
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16
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17 import ch.ethz.ssh2.ConnectionInfo;
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18 import ch.ethz.ssh2.PacketTypeException;
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19 import ch.ethz.ssh2.auth.ServerAuthenticationManager;
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20 import ch.ethz.ssh2.crypto.cipher.BlockCipher;
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21 import ch.ethz.ssh2.crypto.cipher.BlockCipherFactory;
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22 import ch.ethz.ssh2.crypto.dh.GenericDhExchange;
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23 import ch.ethz.ssh2.crypto.digest.MAC;
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24 import ch.ethz.ssh2.packets.PacketKexDHInit;
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25 import ch.ethz.ssh2.packets.PacketKexDHReply;
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26 import ch.ethz.ssh2.packets.PacketKexInit;
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27 import ch.ethz.ssh2.packets.Packets;
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28 import ch.ethz.ssh2.server.ServerConnectionState;
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29 import ch.ethz.ssh2.signature.DSASHA1Verify;
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30 import ch.ethz.ssh2.signature.ECDSASHA2Verify;
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31 import ch.ethz.ssh2.signature.RSASHA1Verify;
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32
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33 /**
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34 * @version $Id: ServerKexManager.java 160 2014-05-01 14:30:26Z dkocher@sudo.ch $
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35 */
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36 public class ServerKexManager extends KexManager {
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37
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38 private final ServerConnectionState state;
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39
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40 private boolean authenticationStarted = false;
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41
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42 public ServerKexManager(ServerConnectionState state) {
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43 super(state.tm, state.csh, state.next_cryptoWishList, state.generator);
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44 this.state = state;
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45 }
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46
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47 public void handleFailure(final IOException failure) {
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48 synchronized (accessLock) {
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49 connectionClosed = true;
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50 accessLock.notifyAll();
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51 }
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52 }
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53
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54 public void handleMessage(byte[] msg) throws IOException {
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55 PacketKexInit kip;
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56
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57 if (msg == null) {
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58 synchronized (accessLock) {
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59 connectionClosed = true;
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60 accessLock.notifyAll();
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61 return;
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62 }
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63 }
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64
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65 if ((kxs == null) && (msg[0] != Packets.SSH_MSG_KEXINIT)) {
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66 throw new PacketTypeException(msg[0]);
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67 }
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68
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69 if (ignore_next_kex_packet) {
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70 ignore_next_kex_packet = false;
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71 return;
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72 }
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73
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74 if (msg[0] == Packets.SSH_MSG_KEXINIT) {
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75 if ((kxs != null) && (kxs.state != 0)) {
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76 throw new PacketTypeException(msg[0]);
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77 }
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78
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79 if (kxs == null) {
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80 /*
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81 * Ah, OK, peer wants to do KEX. Let's be nice and play
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82 * together.
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83 */
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84 kxs = new KexState();
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85 kxs.local_dsa_key = nextKEXdsakey;
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86 kxs.local_rsa_key = nextKEXrsakey;
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87 kxs.local_ec_key = nextKEXeckey;
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88 kxs.dhgexParameters = nextKEXdhgexParameters;
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89 kip = new PacketKexInit(nextKEXcryptoWishList, rnd);
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90 kxs.localKEX = kip;
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91 tm.sendKexMessage(kip.getPayload());
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92 }
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93
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94 kip = new PacketKexInit(msg);
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95 kxs.remoteKEX = kip;
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96 kxs.np = mergeKexParameters(kxs.remoteKEX.getKexParameters(), kxs.localKEX.getKexParameters());
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97
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98 if (kxs.remoteKEX.isFirst_kex_packet_follows() && (kxs.np.guessOK == false)) {
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99 // Guess was wrong, we need to ignore the next kex packet.
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100 ignore_next_kex_packet = true;
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101 }
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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.np.kex_algo.equals("diffie-hellman-group14-sha1") ||
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105 kxs.np.kex_algo.equals("ecdh-sha2-nistp256") ||
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106 kxs.np.kex_algo.equals("ecdh-sha2-nistp384") ||
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107 kxs.np.kex_algo.equals("ecdh-sha2-nistp521")) {
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108 kxs.dhx = GenericDhExchange.getInstance(kxs.np.kex_algo);
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109 kxs.dhx.init(kxs.np.kex_algo);
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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 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 ConnectionInfo sci = new ConnectionInfo();
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142 kexCount++;
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Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
143 sci.keyExchangeAlgorithm = kxs.np.kex_algo;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
144 sci.keyExchangeCounter = kexCount;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
145 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
146 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
147 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
148 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
149 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
150 sci.serverHostKey = kxs.remote_hostkey;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
151
330
6740870cf268 fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 316
diff changeset
152 synchronized (accessLock) {
273
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
153 lastConnInfo = sci;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
154 accessLock.notifyAll();
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 kxs = null;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
158 return;
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
330
6740870cf268 fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 316
diff changeset
161 if ((kxs == null) || (kxs.state == 0)) {
273
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
162 throw new IOException("Unexpected Kex submessage!");
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
306
90e47d99ea54 add ecdsa key support everywhere
Carl Byington <carl@five-ten-sg.com>
parents: 305
diff changeset
165 if (kxs.np.kex_algo.equals("diffie-hellman-group1-sha1") ||
330
6740870cf268 fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 316
diff changeset
166 kxs.np.kex_algo.equals("diffie-hellman-group14-sha1") ||
6740870cf268 fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 316
diff changeset
167 kxs.np.kex_algo.equals("ecdh-sha2-nistp256") ||
6740870cf268 fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 316
diff changeset
168 kxs.np.kex_algo.equals("ecdh-sha2-nistp384") ||
6740870cf268 fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 316
diff changeset
169 kxs.np.kex_algo.equals("ecdh-sha2-nistp521")) {
6740870cf268 fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 316
diff changeset
170 if (kxs.state == 1) {
273
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 kxs.dhx.setE(dhi.getE());
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
173 byte[] hostKey = null;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
174
298
ab3a99f11a36 add ecdsa key support everywhere
Carl Byington <carl@five-ten-sg.com>
parents: 287
diff changeset
175 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
176 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
177 }
ab3a99f11a36 add ecdsa key support everywhere
Carl Byington <carl@five-ten-sg.com>
parents: 287
diff changeset
178
330
6740870cf268 fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 316
diff changeset
179 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
180 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
181 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
182
330
6740870cf268 fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 316
diff changeset
183 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
184 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
185 }
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 try {
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
188 kxs.H = kxs.dhx.calculateH(csh.getClientString(), csh.getServerString(),
330
6740870cf268 fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 316
diff changeset
189 kxs.remoteKEX.getPayload(), kxs.localKEX.getPayload(), hostKey);
273
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
190 }
330
6740870cf268 fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 316
diff changeset
191 catch (IllegalArgumentException e) {
273
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
192 throw new IOException("KEX error.", e);
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 kxs.K = kxs.dhx.getK();
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
196 byte[] signature = null;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
197
298
ab3a99f11a36 add ecdsa key support everywhere
Carl Byington <carl@five-ten-sg.com>
parents: 287
diff changeset
198 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
199 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
200 byte[] es = ECDSASHA2Verify.generateSignature(kxs.H, pk);
beaccc9df37b add ecdsa key support everywhere
Carl Byington <carl@five-ten-sg.com>
parents: 298
diff changeset
201 signature = ECDSASHA2Verify.encodeSSHECDSASignature(es, pk.getParams());
298
ab3a99f11a36 add ecdsa key support everywhere
Carl Byington <carl@five-ten-sg.com>
parents: 287
diff changeset
202 }
ab3a99f11a36 add ecdsa key support everywhere
Carl Byington <carl@five-ten-sg.com>
parents: 287
diff changeset
203
ab3a99f11a36 add ecdsa key support everywhere
Carl Byington <carl@five-ten-sg.com>
parents: 287
diff changeset
204 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
205 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
206 signature = RSASHA1Verify.encodeSSHRSASignature(rs);
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
207 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
208
298
ab3a99f11a36 add ecdsa key support everywhere
Carl Byington <carl@five-ten-sg.com>
parents: 287
diff changeset
209 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
210 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
211 signature = DSASHA1Verify.encodeSSHDSASignature(ds);
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
314
d85bc45139f2 add ecdsa key support everywhere
Carl Byington <carl@five-ten-sg.com>
parents: 311
diff changeset
214 PacketKexDHReply dhr = new PacketKexDHReply(hostKey, new BigInteger(kxs.dhx.getF()), signature);
273
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
215 tm.sendKexMessage(dhr.getPayload());
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
216 finishKex(false);
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
217 kxs.state = -1;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
218
330
6740870cf268 fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 316
diff changeset
219 if (authenticationStarted == false) {
273
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
220 authenticationStarted = true;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
221 state.am = new ServerAuthenticationManager(state);
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
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
224 return;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
225 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
226 }
330
6740870cf268 fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 316
diff changeset
227
273
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
228 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
229 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
230 }