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