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annotate src/ch/ethz/ssh2/packets/PacketKexInit.java @ 346:d6ab7b606a50

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compensate for SecureRandom bug on older devices
author Carl Byington <carl@five-ten-sg.com>
date Thu, 31 Jul 2014 18:51:21 -0700
parents 071eccdff8ea
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 /*
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2 * Copyright (c) 2006-2011 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.packets;
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6
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7 import java.io.IOException;
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8 import java.security.SecureRandom;
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9
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10 import ch.ethz.ssh2.PacketFormatException;
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11 import ch.ethz.ssh2.PacketTypeException;
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12 import ch.ethz.ssh2.crypto.CryptoWishList;
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13 import ch.ethz.ssh2.transport.KexParameters;
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14
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15 /**
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16 * @author Christian Plattner
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17 * @version $Id: PacketKexInit.java 160 2014-05-01 14:30:26Z dkocher@sudo.ch $
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18 */
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19 public final class PacketKexInit {
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20 private final byte[] payload;
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21
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22 KexParameters kp = new KexParameters();
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23
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24 public PacketKexInit(CryptoWishList cwl, SecureRandom rnd) {
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25 kp.cookie = new byte[16];
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26 rnd.nextBytes(kp.cookie);
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27 kp.kex_algorithms = cwl.kexAlgorithms;
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28 kp.server_host_key_algorithms = cwl.serverHostKeyAlgorithms;
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29 kp.encryption_algorithms_client_to_server = cwl.c2s_enc_algos;
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30 kp.encryption_algorithms_server_to_client = cwl.s2c_enc_algos;
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31 kp.mac_algorithms_client_to_server = cwl.c2s_mac_algos;
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32 kp.mac_algorithms_server_to_client = cwl.s2c_mac_algos;
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33 kp.compression_algorithms_client_to_server = cwl.c2s_comp_algos;
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34 kp.compression_algorithms_server_to_client = cwl.s2c_comp_algos;
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35 kp.languages_client_to_server = new String[] {""};
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36 kp.languages_server_to_client = new String[] {""};
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37 kp.first_kex_packet_follows = false;
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38 kp.reserved_field1 = 0;
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39 TypesWriter tw = new TypesWriter();
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40 tw.writeByte(Packets.SSH_MSG_KEXINIT);
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41 tw.writeBytes(kp.cookie, 0, 16);
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42 tw.writeNameList(kp.kex_algorithms);
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43 tw.writeNameList(kp.server_host_key_algorithms);
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44 tw.writeNameList(kp.encryption_algorithms_client_to_server);
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45 tw.writeNameList(kp.encryption_algorithms_server_to_client);
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46 tw.writeNameList(kp.mac_algorithms_client_to_server);
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47 tw.writeNameList(kp.mac_algorithms_server_to_client);
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48 tw.writeNameList(kp.compression_algorithms_client_to_server);
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49 tw.writeNameList(kp.compression_algorithms_server_to_client);
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50 tw.writeNameList(kp.languages_client_to_server);
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51 tw.writeNameList(kp.languages_server_to_client);
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52 tw.writeBoolean(kp.first_kex_packet_follows);
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53 tw.writeUINT32(kp.reserved_field1);
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54 payload = tw.getBytes();
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55 }
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56
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57 public PacketKexInit(byte payload[]) throws IOException {
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58 this.payload = payload;
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59 TypesReader tr = new TypesReader(payload);
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60 int packet_type = tr.readByte();
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61
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62 if (packet_type != Packets.SSH_MSG_KEXINIT) {
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63 throw new PacketTypeException(packet_type);
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64 }
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65
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66 kp.cookie = tr.readBytes(16);
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67 kp.kex_algorithms = tr.readNameList();
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68 kp.server_host_key_algorithms = tr.readNameList();
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69 kp.encryption_algorithms_client_to_server = tr.readNameList();
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70 kp.encryption_algorithms_server_to_client = tr.readNameList();
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71 kp.mac_algorithms_client_to_server = tr.readNameList();
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72 kp.mac_algorithms_server_to_client = tr.readNameList();
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73 kp.compression_algorithms_client_to_server = tr.readNameList();
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74 kp.compression_algorithms_server_to_client = tr.readNameList();
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75 kp.languages_client_to_server = tr.readNameList();
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76 kp.languages_server_to_client = tr.readNameList();
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77 kp.first_kex_packet_follows = tr.readBoolean();
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78 kp.reserved_field1 = tr.readUINT32();
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79
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80 if (tr.remain() != 0) {
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81 throw new PacketFormatException(String.format("Padding in %s", Packets.getMessageName(packet_type)));
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82 }
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83 }
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84
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85 public byte[] getPayload() {
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86 return payload;
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87 }
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88
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89 public KexParameters getKexParameters() {
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90 return kp;
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91 }
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92
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93 public String[] getCompression_algorithms_client_to_server() {
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94 return kp.compression_algorithms_client_to_server;
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95 }
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96
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97 public String[] getCompression_algorithms_server_to_client() {
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98 return kp.compression_algorithms_server_to_client;
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99 }
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100
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101 public byte[] getCookie() {
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102 return kp.cookie;
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103 }
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104
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105 public String[] getEncryption_algorithms_client_to_server() {
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106 return kp.encryption_algorithms_client_to_server;
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107 }
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108
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109 public String[] getEncryption_algorithms_server_to_client() {
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110 return kp.encryption_algorithms_server_to_client;
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111 }
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112
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113 public boolean isFirst_kex_packet_follows() {
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114 return kp.first_kex_packet_follows;
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115 }
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116
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117 public String[] getKex_algorithms() {
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118 return kp.kex_algorithms;
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119 }
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120
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121 public String[] getLanguages_client_to_server() {
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122 return kp.languages_client_to_server;
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123 }
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124
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125 public String[] getLanguages_server_to_client() {
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126 return kp.languages_server_to_client;
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127 }
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128
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129 public String[] getMac_algorithms_client_to_server() {
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130 return kp.mac_algorithms_client_to_server;
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131 }
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132
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133 public String[] getMac_algorithms_server_to_client() {
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134 return kp.mac_algorithms_server_to_client;
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135 }
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136
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137 public int getReserved_field1() {
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138 return kp.reserved_field1;
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139 }
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140
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Carl Byington <carl@five-ten-sg.com>
parents:
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141 public String[] getServer_host_key_algorithms() {
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
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142 return kp.server_host_key_algorithms;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
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143 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
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144 }