1 /* 2 * Copyright (c) 2006-2011 Christian Plattner. All rights reserved. 3 * Please refer to the LICENSE.txt for licensing details. 4 */ 5 package ch.ethz.ssh2.packets; 6 7 import java.io.IOException; 8 import java.security.SecureRandom; 9 10 import ch.ethz.ssh2.crypto.CryptoWishList; 11 import ch.ethz.ssh2.transport.KexParameters; 12 13 /** 14 * PacketKexInit. 15 * 16 * @author Christian Plattner 17 * @version 2.50, 03/15/10 18 */ 19 public class PacketKexInit 20 { 21 byte[] payload; 22 23 KexParameters kp = new KexParameters(); 24 25 public PacketKexInit(CryptoWishList cwl, SecureRandom rnd) 26 { 27 kp.cookie = new byte[16]; 28 rnd.nextBytes(kp.cookie); 29 30 kp.kex_algorithms = cwl.kexAlgorithms; 31 kp.server_host_key_algorithms = cwl.serverHostKeyAlgorithms; 32 kp.encryption_algorithms_client_to_server = cwl.c2s_enc_algos; 33 kp.encryption_algorithms_server_to_client = cwl.s2c_enc_algos; 34 kp.mac_algorithms_client_to_server = cwl.c2s_mac_algos; 35 kp.mac_algorithms_server_to_client = cwl.s2c_mac_algos; 36 kp.compression_algorithms_client_to_server = new String[] { "none" }; 37 kp.compression_algorithms_server_to_client = new String[] { "none" }; 38 kp.languages_client_to_server = new String[] {}; 39 kp.languages_server_to_client = new String[] {}; 40 kp.first_kex_packet_follows = false; 41 kp.reserved_field1 = 0; 42 } 43 44 public PacketKexInit(byte payload[], int off, int len) throws IOException 45 { 46 this.payload = new byte[len]; 47 System.arraycopy(payload, off, this.payload, 0, len); 48 49 TypesReader tr = new TypesReader(payload, off, len); 50 51 int packet_type = tr.readByte(); 52 53 if (packet_type != Packets.SSH_MSG_KEXINIT) 54 throw new IOException("This is not a KexInitPacket! (" + packet_type + ")"); 55 56 kp.cookie = tr.readBytes(16); 57 kp.kex_algorithms = tr.readNameList(); 58 kp.server_host_key_algorithms = tr.readNameList(); 59 kp.encryption_algorithms_client_to_server = tr.readNameList(); 60 kp.encryption_algorithms_server_to_client = tr.readNameList(); 61 kp.mac_algorithms_client_to_server = tr.readNameList(); 62 kp.mac_algorithms_server_to_client = tr.readNameList(); 63 kp.compression_algorithms_client_to_server = tr.readNameList(); 64 kp.compression_algorithms_server_to_client = tr.readNameList(); 65 kp.languages_client_to_server = tr.readNameList(); 66 kp.languages_server_to_client = tr.readNameList(); 67 kp.first_kex_packet_follows = tr.readBoolean(); 68 kp.reserved_field1 = tr.readUINT32(); 69 70 if (tr.remain() != 0) 71 throw new IOException("Padding in KexInitPacket!"); 72 } 73 74 public byte[] getPayload() 75 { 76 if (payload == null) 77 { 78 TypesWriter tw = new TypesWriter(); 79 tw.writeByte(Packets.SSH_MSG_KEXINIT); 80 tw.writeBytes(kp.cookie, 0, 16); 81 tw.writeNameList(kp.kex_algorithms); 82 tw.writeNameList(kp.server_host_key_algorithms); 83 tw.writeNameList(kp.encryption_algorithms_client_to_server); 84 tw.writeNameList(kp.encryption_algorithms_server_to_client); 85 tw.writeNameList(kp.mac_algorithms_client_to_server); 86 tw.writeNameList(kp.mac_algorithms_server_to_client); 87 tw.writeNameList(kp.compression_algorithms_client_to_server); 88 tw.writeNameList(kp.compression_algorithms_server_to_client); 89 tw.writeNameList(kp.languages_client_to_server); 90 tw.writeNameList(kp.languages_server_to_client); 91 tw.writeBoolean(kp.first_kex_packet_follows); 92 tw.writeUINT32(kp.reserved_field1); 93 payload = tw.getBytes(); 94 } 95 return payload; 96 } 97 98 public KexParameters getKexParameters() 99 { 100 return kp; 101 } 102 103 public String[] getCompression_algorithms_client_to_server() 104 { 105 return kp.compression_algorithms_client_to_server; 106 } 107 108 public String[] getCompression_algorithms_server_to_client() 109 { 110 return kp.compression_algorithms_server_to_client; 111 } 112 113 public byte[] getCookie() 114 { 115 return kp.cookie; 116 } 117 118 public String[] getEncryption_algorithms_client_to_server() 119 { 120 return kp.encryption_algorithms_client_to_server; 121 } 122 123 public String[] getEncryption_algorithms_server_to_client() 124 { 125 return kp.encryption_algorithms_server_to_client; 126 } 127 128 public boolean isFirst_kex_packet_follows() 129 { 130 return kp.first_kex_packet_follows; 131 } 132 133 public String[] getKex_algorithms() 134 { 135 return kp.kex_algorithms; 136 } 137 138 public String[] getLanguages_client_to_server() 139 { 140 return kp.languages_client_to_server; 141 } 142 143 public String[] getLanguages_server_to_client() 144 { 145 return kp.languages_server_to_client; 146 } 147 148 public String[] getMac_algorithms_client_to_server() 149 { 150 return kp.mac_algorithms_client_to_server; 151 } 152 153 public String[] getMac_algorithms_server_to_client() 154 { 155 return kp.mac_algorithms_server_to_client; 156 } 157 158 public int getReserved_field1() 159 { 160 return kp.reserved_field1; 161 } 162 163 public String[] getServer_host_key_algorithms() 164 { 165 return kp.server_host_key_algorithms; 166 } 167 } 168
