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comparison src/com/trilead/ssh2/packets/PacketKexInit.java @ 0:0ce5cc452d02

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initial version
author Carl Byington <carl@five-ten-sg.com>
date Thu, 22 May 2014 10:41:19 -0700
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1
2 package com.trilead.ssh2.packets;
3
4 import java.io.IOException;
5 import java.security.SecureRandom;
6
7 import com.trilead.ssh2.crypto.CryptoWishList;
8 import com.trilead.ssh2.transport.KexParameters;
9
10
11 /**
12 * PacketKexInit.
13 *
14 * @author Christian Plattner, plattner@trilead.com
15 * @version $Id: PacketKexInit.java,v 1.1 2007/10/15 12:49:55 cplattne Exp $
16 */
17 public class PacketKexInit {
18 byte[] payload;
19
20 KexParameters kp = new KexParameters();
21
22 public PacketKexInit(CryptoWishList cwl) {
23 kp.cookie = new byte[16];
24 new SecureRandom().nextBytes(kp.cookie);
25 kp.kex_algorithms = cwl.kexAlgorithms;
26 kp.server_host_key_algorithms = cwl.serverHostKeyAlgorithms;
27 kp.encryption_algorithms_client_to_server = cwl.c2s_enc_algos;
28 kp.encryption_algorithms_server_to_client = cwl.s2c_enc_algos;
29 kp.mac_algorithms_client_to_server = cwl.c2s_mac_algos;
30 kp.mac_algorithms_server_to_client = cwl.s2c_mac_algos;
31 kp.compression_algorithms_client_to_server = cwl.c2s_comp_algos;
32 kp.compression_algorithms_server_to_client = cwl.s2c_comp_algos;
33 kp.languages_client_to_server = new String[] {};
34 kp.languages_server_to_client = new String[] {};
35 kp.first_kex_packet_follows = false;
36 kp.reserved_field1 = 0;
37 }
38
39 public PacketKexInit(byte payload[], int off, int len) throws IOException {
40 this.payload = new byte[len];
41 System.arraycopy(payload, off, this.payload, 0, len);
42 TypesReader tr = new TypesReader(payload, off, len);
43 int packet_type = tr.readByte();
44
45 if (packet_type != Packets.SSH_MSG_KEXINIT)
46 throw new IOException("This is not a KexInitPacket! (" + packet_type + ")");
47
48 kp.cookie = tr.readBytes(16);
49 kp.kex_algorithms = tr.readNameList();
50 kp.server_host_key_algorithms = tr.readNameList();
51 kp.encryption_algorithms_client_to_server = tr.readNameList();
52 kp.encryption_algorithms_server_to_client = tr.readNameList();
53 kp.mac_algorithms_client_to_server = tr.readNameList();
54 kp.mac_algorithms_server_to_client = tr.readNameList();
55 kp.compression_algorithms_client_to_server = tr.readNameList();
56 kp.compression_algorithms_server_to_client = tr.readNameList();
57 kp.languages_client_to_server = tr.readNameList();
58 kp.languages_server_to_client = tr.readNameList();
59 kp.first_kex_packet_follows = tr.readBoolean();
60 kp.reserved_field1 = tr.readUINT32();
61
62 if (tr.remain() != 0)
63 throw new IOException("Padding in KexInitPacket!");
64 }
65
66 public byte[] getPayload() {
67 if (payload == null) {
68 TypesWriter tw = new TypesWriter();
69 tw.writeByte(Packets.SSH_MSG_KEXINIT);
70 tw.writeBytes(kp.cookie, 0, 16);
71 tw.writeNameList(kp.kex_algorithms);
72 tw.writeNameList(kp.server_host_key_algorithms);
73 tw.writeNameList(kp.encryption_algorithms_client_to_server);
74 tw.writeNameList(kp.encryption_algorithms_server_to_client);
75 tw.writeNameList(kp.mac_algorithms_client_to_server);
76 tw.writeNameList(kp.mac_algorithms_server_to_client);
77 tw.writeNameList(kp.compression_algorithms_client_to_server);
78 tw.writeNameList(kp.compression_algorithms_server_to_client);
79 tw.writeNameList(kp.languages_client_to_server);
80 tw.writeNameList(kp.languages_server_to_client);
81 tw.writeBoolean(kp.first_kex_packet_follows);
82 tw.writeUINT32(kp.reserved_field1);
83 payload = tw.getBytes();
84 }
85
86 return payload;
87 }
88
89 public KexParameters getKexParameters() {
90 return kp;
91 }
92
93 public String[] getCompression_algorithms_client_to_server() {
94 return kp.compression_algorithms_client_to_server;
95 }
96
97 public String[] getCompression_algorithms_server_to_client() {
98 return kp.compression_algorithms_server_to_client;
99 }
100
101 public byte[] getCookie() {
102 return kp.cookie;
103 }
104
105 public String[] getEncryption_algorithms_client_to_server() {
106 return kp.encryption_algorithms_client_to_server;
107 }
108
109 public String[] getEncryption_algorithms_server_to_client() {
110 return kp.encryption_algorithms_server_to_client;
111 }
112
113 public boolean isFirst_kex_packet_follows() {
114 return kp.first_kex_packet_follows;
115 }
116
117 public String[] getKex_algorithms() {
118 return kp.kex_algorithms;
119 }
120
121 public String[] getLanguages_client_to_server() {
122 return kp.languages_client_to_server;
123 }
124
125 public String[] getLanguages_server_to_client() {
126 return kp.languages_server_to_client;
127 }
128
129 public String[] getMac_algorithms_client_to_server() {
130 return kp.mac_algorithms_client_to_server;
131 }
132
133 public String[] getMac_algorithms_server_to_client() {
134 return kp.mac_algorithms_server_to_client;
135 }
136
137 public int getReserved_field1() {
138 return kp.reserved_field1;
139 }
140
141 public String[] getServer_host_key_algorithms() {
142 return kp.server_host_key_algorithms;
143 }
144 }