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The core module of Pcap4J.
/*_##########################################################################
_##
_## Copyright (C) 2014 Pcap4J.org
_##
_##########################################################################
*/
package org.pcap4j.packet;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import org.pcap4j.packet.namednumber.Ssh2MessageNumber;
import org.pcap4j.util.ByteArrays;
/**
* @author Kaito Yamada
* @since pcap4j 1.0.1
*/
public final class Ssh2KexInitPacket extends AbstractPacket {
/**
*
*/
private static final long serialVersionUID = -2424080361918022468L;
private final Ssh2KexInitHeader header;
/**
* A static factory method.
* This method validates the arguments by {@link ByteArrays#validateBounds(byte[], int, int)},
* which may throw exceptions undocumented here.
*
* @param rawData rawData
* @param offset offset
* @param length length
* @return a new Ssh2KexInitPacket object.
* @throws IllegalRawDataException if parsing the raw data fails.
*/
public static Ssh2KexInitPacket newPacket(
byte[] rawData, int offset, int length
) throws IllegalRawDataException {
ByteArrays.validateBounds(rawData, offset, length);
return new Ssh2KexInitPacket(rawData, offset, length);
}
private Ssh2KexInitPacket(
byte[] rawData, int offset, int length
) throws IllegalRawDataException {
this.header = new Ssh2KexInitHeader(rawData, offset, length);
}
private Ssh2KexInitPacket(Builder builder) {
if (
builder == null
|| builder.cookie == null
|| builder.kexAlgorithms == null
|| builder.serverHostKeyAlgorithms == null
|| builder.encryptionAlgorithmsClientToServer == null
|| builder.encryptionAlgorithmsServerToClient == null
|| builder.macAlgorithmsClientToServer == null
|| builder.macAlgorithmsServerToClient == null
|| builder.compressionAlgorithmsClientToServer == null
|| builder.compressionAlgorithmsServerToClient == null
|| builder.languagesClientToServer == null
|| builder.languagesServerToClient == null
|| builder.firstKexPacketFollows == null
) {
StringBuilder sb = new StringBuilder();
sb.append("builder: ").append(builder)
.append(" builder.cookie: ").append(builder.cookie)
.append(" builder.kexAlgorithms: ").append(builder.kexAlgorithms)
.append(" builder.serverHostKeyAlgorithms: ").append(builder.serverHostKeyAlgorithms)
.append(" builder.encryptionAlgorithmsClientToServer: ").append(builder.encryptionAlgorithmsClientToServer)
.append(" builder.encryptionAlgorithmsServerToClient: ").append(builder.encryptionAlgorithmsServerToClient)
.append(" builder.macAlgorithmsClientToServer: ").append(builder.macAlgorithmsClientToServer)
.append(" builder.macAlgorithmsServerToClient: ").append(builder.macAlgorithmsServerToClient)
.append(" builder.compressionAlgorithmsClientToServer: ").append(builder.compressionAlgorithmsClientToServer)
.append(" builder.compressionAlgorithmsServerToClient: ").append(builder.compressionAlgorithmsServerToClient)
.append(" builder.languagesClientToServer: ").append(builder.languagesClientToServer)
.append(" builder.languagesServerToClient: ").append(builder.languagesServerToClient)
.append(" builder.firstKexPacketFollows: ").append(builder.firstKexPacketFollows);
throw new NullPointerException(sb.toString());
}
this.header = new Ssh2KexInitHeader(builder);
}
@Override
public Ssh2KexInitHeader getHeader() {
return header;
}
@Override
public Builder getBuilder() {
return new Builder(this);
}
/**
*
* @author Kaito Yamada
* @since pcap4j 1.0.1
*/
public static final class Builder extends AbstractBuilder {
private byte[] cookie;
private Ssh2NameList kexAlgorithms;
private Ssh2NameList serverHostKeyAlgorithms;
private Ssh2NameList encryptionAlgorithmsClientToServer;
private Ssh2NameList encryptionAlgorithmsServerToClient;
private Ssh2NameList macAlgorithmsClientToServer;
private Ssh2NameList macAlgorithmsServerToClient;
private Ssh2NameList compressionAlgorithmsClientToServer;
private Ssh2NameList compressionAlgorithmsServerToClient;
private Ssh2NameList languagesClientToServer;
private Ssh2NameList languagesServerToClient;
private Ssh2Boolean firstKexPacketFollows;
private int reserved;
/**
*
*/
public Builder() {}
private Builder(Ssh2KexInitPacket packet) {
this.cookie = packet.header.cookie;
this.kexAlgorithms = packet.header.kexAlgorithms;
this.serverHostKeyAlgorithms = packet.header.serverHostKeyAlgorithms;
this.encryptionAlgorithmsClientToServer = packet.header.encryptionAlgorithmsClientToServer;
this.encryptionAlgorithmsServerToClient = packet.header.encryptionAlgorithmsServerToClient;
this.macAlgorithmsClientToServer = packet.header.macAlgorithmsClientToServer;
this.macAlgorithmsServerToClient = packet.header.macAlgorithmsServerToClient;
this.compressionAlgorithmsClientToServer = packet.header.compressionAlgorithmsClientToServer;
this.compressionAlgorithmsServerToClient = packet.header.compressionAlgorithmsServerToClient;
this.languagesClientToServer = packet.header.languagesClientToServer;
this.languagesServerToClient = packet.header.languagesServerToClient;
this.firstKexPacketFollows = packet.header.firstKexPacketFollows;
this.reserved = packet.header.reserved;
}
/**
*
* @param cookie cookie
* @return this Builder object for method chaining.
*/
public Builder cookie(byte[] cookie) {
this.cookie = cookie;
return this;
}
/**
*
* @param kexAlgorithms kexAlgorithms
* @return this Builder object for method chaining.
*/
public Builder kexAlgorithms(Ssh2NameList kexAlgorithms) {
this.kexAlgorithms = kexAlgorithms;
return this;
}
/**
*
* @param serverHostKeyAlgorithms serverHostKeyAlgorithms
* @return this Builder object for method chaining.
*/
public Builder serverHostKeyAlgorithms(Ssh2NameList serverHostKeyAlgorithms) {
this.serverHostKeyAlgorithms = serverHostKeyAlgorithms;
return this;
}
/**
*
* @param encryptionAlgorithmsClientToServer encryptionAlgorithmsClientToServer
* @return this Builder object for method chaining.
*/
public Builder encryptionAlgorithmsClientToServer(Ssh2NameList encryptionAlgorithmsClientToServer) {
this.encryptionAlgorithmsClientToServer = encryptionAlgorithmsClientToServer;
return this;
}
/**
*
* @param encryptionAlgorithmsServerToClient encryptionAlgorithmsServerToClient
* @return this Builder object for method chaining.
*/
public Builder encryptionAlgorithmsServerToClient(Ssh2NameList encryptionAlgorithmsServerToClient) {
this.encryptionAlgorithmsServerToClient = encryptionAlgorithmsServerToClient;
return this;
}
/**
*
* @param macAlgorithmsClientToServer macAlgorithmsClientToServer
* @return this Builder object for method chaining.
*/
public Builder macAlgorithmsClientToServer(Ssh2NameList macAlgorithmsClientToServer) {
this.macAlgorithmsClientToServer = macAlgorithmsClientToServer;
return this;
}
/**
*
* @param macAlgorithmsServerToClient macAlgorithmsServerToClient
* @return this Builder object for method chaining.
*/
public Builder macAlgorithmsServerToClient(Ssh2NameList macAlgorithmsServerToClient) {
this.macAlgorithmsServerToClient = macAlgorithmsServerToClient;
return this;
}
/**
*
* @param compressionAlgorithmsClientToServer compressionAlgorithmsClientToServer
* @return this Builder object for method chaining.
*/
public Builder compressionAlgorithmsClientToServer(
Ssh2NameList compressionAlgorithmsClientToServer
) {
this.compressionAlgorithmsClientToServer = compressionAlgorithmsClientToServer;
return this;
}
/**
*
* @param compressionAlgorithmsServerToClient compressionAlgorithmsServerToClient
* @return this Builder object for method chaining.
*/
public Builder compressionAlgorithmsServerToClient(
Ssh2NameList compressionAlgorithmsServerToClient
) {
this.compressionAlgorithmsServerToClient = compressionAlgorithmsServerToClient;
return this;
}
/**
*
* @param languagesClientToServer languagesClientToServer
* @return this Builder object for method chaining.
*/
public Builder languagesClientToServer(Ssh2NameList languagesClientToServer) {
this.languagesClientToServer = languagesClientToServer;
return this;
}
/**
*
* @param languagesServerToClient languagesServerToClient
* @return this Builder object for method chaining.
*/
public Builder languagesServerToClient(Ssh2NameList languagesServerToClient) {
this.languagesServerToClient = languagesServerToClient;
return this;
}
/**
*
* @param firstKexPacketFollows firstKexPacketFollows
* @return this Builder object for method chaining.
*/
public Builder firstKexPacketFollows(Ssh2Boolean firstKexPacketFollows) {
this.firstKexPacketFollows = firstKexPacketFollows;
return this;
}
/**
*
* @param reserved reserved
* @return this Builder object for method chaining.
*/
public Builder reserved(int reserved) {
this.reserved = reserved;
return this;
}
@Override
public Ssh2KexInitPacket build() {
return new Ssh2KexInitPacket(this);
}
}
/**
*
* @author Kaito Yamada
* @version pcap4j 1.0.1
*/
public static final class Ssh2KexInitHeader extends AbstractHeader {
/*
* http://tools.ietf.org/html/rfc4253
*
* byte SSH_MSG_KEXINIT
* byte[16] cookie (random bytes)
* name-list kex_algorithms
* name-list server_host_key_algorithms
* name-list encryption_algorithms_client_to_server
* name-list encryption_algorithms_server_to_client
* name-list mac_algorithms_client_to_server
* name-list mac_algorithms_server_to_client
* name-list compression_algorithms_client_to_server
* name-list compression_algorithms_server_to_client
* name-list languages_client_to_server
* name-list languages_server_to_client
* boolean first_kex_packet_follows
* uint32 0 (reserved for future extension)
*/
/**
*
*/
private static final long serialVersionUID = -2780304573850816908L;
private final Ssh2MessageNumber messageNumber = Ssh2MessageNumber.SSH_MSG_KEXINIT;
private final byte[] cookie;
private final Ssh2NameList kexAlgorithms;
private final Ssh2NameList serverHostKeyAlgorithms;
private final Ssh2NameList encryptionAlgorithmsClientToServer;
private final Ssh2NameList encryptionAlgorithmsServerToClient;
private final Ssh2NameList macAlgorithmsClientToServer;
private final Ssh2NameList macAlgorithmsServerToClient;
private final Ssh2NameList compressionAlgorithmsClientToServer;
private final Ssh2NameList compressionAlgorithmsServerToClient;
private final Ssh2NameList languagesClientToServer;
private final Ssh2NameList languagesServerToClient;
private final Ssh2Boolean firstKexPacketFollows;
private final int reserved;
private Ssh2KexInitHeader(
byte[] rawData, int offset, int length
) throws IllegalRawDataException {
if (length < 62) {
StringBuilder sb = new StringBuilder(120);
sb.append("The data is too short to build an SSH2 KEX init header. data: ")
.append(new String(rawData))
.append(", offset: ")
.append(offset)
.append(", length: ")
.append(length);
throw new IllegalRawDataException(sb.toString());
}
if (
!Ssh2MessageNumber.getInstance(rawData[offset])
.equals(Ssh2MessageNumber.SSH_MSG_KEXINIT)
) {
StringBuilder sb = new StringBuilder(120);
sb.append("The data is not an SSH2 KEX init message. data: ")
.append(new String(rawData))
.append(", offset: ")
.append(offset)
.append(", length: ")
.append(length);
throw new IllegalRawDataException(sb.toString());
}
int currentOffset = 1 + offset;
int remainingLength = length - 1;
this.cookie = ByteArrays.getSubArray(rawData, currentOffset, 16);
currentOffset += cookie.length;
remainingLength -= cookie.length;
this.kexAlgorithms = new Ssh2NameList(rawData, currentOffset, remainingLength);
currentOffset += kexAlgorithms.length();
remainingLength -= kexAlgorithms.length();
this.serverHostKeyAlgorithms = new Ssh2NameList(rawData, currentOffset, remainingLength);
currentOffset += serverHostKeyAlgorithms.length();
remainingLength -= serverHostKeyAlgorithms.length();
this.encryptionAlgorithmsClientToServer = new Ssh2NameList(rawData, currentOffset, remainingLength);
currentOffset += encryptionAlgorithmsClientToServer.length();
remainingLength -= encryptionAlgorithmsClientToServer.length();
this.encryptionAlgorithmsServerToClient = new Ssh2NameList(rawData, currentOffset, remainingLength);
currentOffset += encryptionAlgorithmsClientToServer.length();
remainingLength -= encryptionAlgorithmsClientToServer.length();
this.macAlgorithmsClientToServer = new Ssh2NameList(rawData, currentOffset, remainingLength);
currentOffset += macAlgorithmsClientToServer.length();
remainingLength -= macAlgorithmsClientToServer.length();
this.macAlgorithmsServerToClient = new Ssh2NameList(rawData, currentOffset, remainingLength);
currentOffset += macAlgorithmsServerToClient.length();
remainingLength -= macAlgorithmsServerToClient.length();
this.compressionAlgorithmsClientToServer = new Ssh2NameList(rawData, currentOffset, remainingLength);
currentOffset += compressionAlgorithmsClientToServer.length();
remainingLength -= compressionAlgorithmsClientToServer.length();
this.compressionAlgorithmsServerToClient = new Ssh2NameList(rawData, currentOffset, remainingLength);
currentOffset += compressionAlgorithmsServerToClient.length();
remainingLength -= compressionAlgorithmsServerToClient.length();
this.languagesClientToServer = new Ssh2NameList(rawData, currentOffset, remainingLength);
currentOffset += languagesClientToServer.length();
remainingLength -= languagesClientToServer.length();
this.languagesServerToClient = new Ssh2NameList(rawData, currentOffset, remainingLength);
currentOffset += languagesServerToClient.length();
remainingLength -= languagesServerToClient.length();
if (remainingLength < 5) {
StringBuilder sb = new StringBuilder(120);
sb.append("The data is too short to build an SSH2 KEX init header. data: ")
.append(new String(rawData))
.append(", offset: ")
.append(offset)
.append(", length: ")
.append(length);
throw new IllegalRawDataException(sb.toString());
}
this.firstKexPacketFollows = new Ssh2Boolean(rawData[currentOffset]);
currentOffset += 1;
this.reserved = ByteArrays.getInt(rawData, currentOffset);
}
private Ssh2KexInitHeader(Builder builder) {
this.cookie = ByteArrays.clone(builder.cookie);
if (cookie.length != 16) {
StringBuilder sb = new StringBuilder(100);
sb.append("cookie length must be 16. builder.cookie: ")
.append(ByteArrays.toHexString(builder.cookie, " "));
throw new IllegalArgumentException(sb.toString());
}
this.kexAlgorithms = builder.kexAlgorithms;
this.serverHostKeyAlgorithms = builder.serverHostKeyAlgorithms;
this.encryptionAlgorithmsClientToServer = builder.encryptionAlgorithmsClientToServer;
this.encryptionAlgorithmsServerToClient = builder.encryptionAlgorithmsServerToClient;
this.macAlgorithmsClientToServer = builder.macAlgorithmsClientToServer;
this.macAlgorithmsServerToClient = builder.macAlgorithmsServerToClient;
this.compressionAlgorithmsClientToServer = builder.compressionAlgorithmsClientToServer;
this.compressionAlgorithmsServerToClient = builder.compressionAlgorithmsServerToClient;
this.languagesClientToServer = builder.languagesClientToServer;
this.languagesServerToClient = builder.languagesServerToClient;
this.firstKexPacketFollows = builder.firstKexPacketFollows;
this.reserved = builder.reserved;
}
/**
*
* @return messageNumber
*/
public Ssh2MessageNumber getMessageNumber() {
return messageNumber;
}
/**
*
* @return cookie
*/
public byte[] getCookie() {
return ByteArrays.clone(cookie);
}
/**
*
* @return kexAlgorithms
*/
public Ssh2NameList getKexAlgorithms() {
return kexAlgorithms;
}
/**
*
* @return serverHostKeyAlgorithms
*/
public Ssh2NameList getServerHostKeyAlgorithms() {
return serverHostKeyAlgorithms;
}
/**
*
* @return encryptionAlgorithmsClientToServer
*/
public Ssh2NameList getEncryptionAlgorithmsClientToServer() {
return encryptionAlgorithmsClientToServer;
}
/**
*
* @return encryptionAlgorithmsServerToClient
*/
public Ssh2NameList getEncryptionAlgorithmsServerToClient() {
return encryptionAlgorithmsServerToClient;
}
/**
*
* @return macAlgorithmsClientToServer
*/
public Ssh2NameList getMacAlgorithmsClientToServer() {
return macAlgorithmsClientToServer;
}
/**
*
* @return macAlgorithmsServerToClient
*/
public Ssh2NameList getMacAlgorithmsServerToClient() {
return macAlgorithmsServerToClient;
}
/**
*
* @return compressionAlgorithmsClientToServer
*/
public Ssh2NameList getCompressionAlgorithmsClientToServer() {
return compressionAlgorithmsClientToServer;
}
/**
*
* @return compressionAlgorithmsServerToClient
*/
public Ssh2NameList getCompressionAlgorithmsServerToClient() {
return compressionAlgorithmsServerToClient;
}
/**
*
* @return languagesClientToServer
*/
public Ssh2NameList getLanguagesClientToServer() {
return languagesClientToServer;
}
/**
*
* @return languagesServerToClient
*/
public Ssh2NameList getLanguagesServerToClient() {
return languagesServerToClient;
}
/**
*
* @return firstKexPacketFollows
*/
public Ssh2Boolean getFirstKexPacketFollows() {
return firstKexPacketFollows;
}
/**
*
* @return reserved
*/
public int getReserved() {
return reserved;
}
@Override
protected List getRawFields() {
List rawFields = new ArrayList();
rawFields.add(new byte[] {messageNumber.value()});
rawFields.add(cookie);
rawFields.add(kexAlgorithms.getRawData());
rawFields.add(serverHostKeyAlgorithms.getRawData());
rawFields.add(encryptionAlgorithmsClientToServer.getRawData());
rawFields.add(encryptionAlgorithmsServerToClient.getRawData());
rawFields.add(macAlgorithmsClientToServer.getRawData());
rawFields.add(macAlgorithmsServerToClient.getRawData());
rawFields.add(compressionAlgorithmsClientToServer.getRawData());
rawFields.add(compressionAlgorithmsServerToClient.getRawData());
rawFields.add(languagesClientToServer.getRawData());
rawFields.add(languagesServerToClient.getRawData());
rawFields.add(firstKexPacketFollows.getRawData());
rawFields.add(ByteArrays.toByteArray(reserved));
return rawFields;
}
@Override
protected int calcLength() { return getRawData().length; }
@Override
protected String buildString() {
StringBuilder sb = new StringBuilder();
String ls = System.getProperty("line.separator");
sb.append("[SSH2 KEX init Header (")
.append(length())
.append(" bytes)]")
.append(ls);
sb.append(" Message Number: ")
.append(messageNumber)
.append(ls);
sb.append(" cookie: ")
.append(ByteArrays.toHexString(cookie, " "))
.append(ls);
sb.append(" kex_algorithms: ")
.append(kexAlgorithms)
.append(ls);
sb.append(" server_host_key_algorithms: ")
.append(serverHostKeyAlgorithms)
.append(ls);
sb.append(" encryption_algorithms_client_to_server: ")
.append(encryptionAlgorithmsClientToServer)
.append(ls);
sb.append(" encryption_algorithms_server_to_client: ")
.append(encryptionAlgorithmsServerToClient)
.append(ls);
sb.append(" mac_algorithms_client_to_server: ")
.append(macAlgorithmsClientToServer)
.append(ls);
sb.append(" mac_algorithms_server_to_client: ")
.append(macAlgorithmsServerToClient)
.append(ls);
sb.append(" compression_algorithms_client_to_server: ")
.append(compressionAlgorithmsClientToServer)
.append(ls);
sb.append(" compression_algorithms_server_to_client: ")
.append(compressionAlgorithmsServerToClient)
.append(ls);
sb.append(" languages_client_to_server: ")
.append(languagesClientToServer)
.append(ls);
sb.append(" languages_server_to_client: ")
.append(languagesServerToClient)
.append(ls);
sb.append(" first_kex_packet_follows: ")
.append(firstKexPacketFollows)
.append(ls);
sb.append(" reserved: ")
.append(ByteArrays.toHexString(reserved, " "))
.append(ls);
return sb.toString();
}
@Override
public boolean equals(Object obj) {
if (obj == this) { return true; }
if (!this.getClass().isInstance(obj)) { return false; }
Ssh2KexInitHeader other = (Ssh2KexInitHeader)obj;
return
Arrays.equals(cookie, other.cookie)
&& kexAlgorithms.equals(other.kexAlgorithms)
&& serverHostKeyAlgorithms.equals(other.serverHostKeyAlgorithms)
&& encryptionAlgorithmsClientToServer.equals(other.encryptionAlgorithmsClientToServer)
&& encryptionAlgorithmsServerToClient.equals(other.encryptionAlgorithmsServerToClient)
&& macAlgorithmsClientToServer.equals(other.macAlgorithmsClientToServer)
&& macAlgorithmsServerToClient.equals(other.macAlgorithmsServerToClient)
&& compressionAlgorithmsClientToServer.equals(other.compressionAlgorithmsClientToServer)
&& compressionAlgorithmsServerToClient.equals(other.compressionAlgorithmsServerToClient)
&& languagesClientToServer.equals(other.languagesClientToServer)
&& languagesServerToClient.equals(other.languagesServerToClient)
&& firstKexPacketFollows.equals(other.firstKexPacketFollows)
&& reserved == other.reserved;
}
@Override
protected int calcHashCode() {
int result = 17;
result = 31 * result + Arrays.hashCode(cookie);
result = 31 * result + kexAlgorithms.hashCode();
result = 31 * result + serverHostKeyAlgorithms.hashCode();
result = 31 * result + encryptionAlgorithmsClientToServer.hashCode();
result = 31 * result + encryptionAlgorithmsServerToClient.hashCode();
result = 31 * result + macAlgorithmsClientToServer.hashCode();
result = 31 * result + macAlgorithmsServerToClient.hashCode();
result = 31 * result + compressionAlgorithmsClientToServer.hashCode();
result = 31 * result + compressionAlgorithmsServerToClient.hashCode();
result = 31 * result + languagesClientToServer.hashCode();
result = 31 * result + languagesServerToClient.hashCode();
result = 31 * result + firstKexPacketFollows.hashCode();
result = 31 * result + reserved;
return result;
}
}
}
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