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Доделан KeyShareExtension

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serega6531
2020-04-20 16:09:42 +03:00
parent 686ebc10b5
commit c72e7b1da9
8 changed files with 72 additions and 22 deletions
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5
src/main/java/ru/serega6531/packmate/service/optimization/tls/extensions/TlsExtension.java
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@@ -9,13 +9,14 @@ public abstract class TlsExtension {
protected ExtensionType type;
protected short extensionLength;
public static TlsExtension newInstance(ExtensionType type, byte[] rawData, int offset, short extensionLength) {
public static TlsExtension newInstance(ExtensionType type, byte[] rawData, int offset,
short extensionLength, boolean client) {
if (extensionLength > 0) {
ByteArrays.validateBounds(rawData, offset, extensionLength);
}
if (type == ExtensionType.KEY_SHARE) {
return new KeyShareExtension(type, rawData, offset, extensionLength);
return KeyShareExtension.newInstance(type, rawData, offset, extensionLength, client);
} else {
return new UnimplementedTlsExtension(type, rawData, offset, extensionLength);
}

4
src/main/java/ru/serega6531/packmate/service/optimization/tls/extensions/UnimplementedTlsExtension.java
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@@ -15,6 +15,10 @@ public class UnimplementedTlsExtension extends TlsExtension {
@Override
public String toString() {
if(extensionLength > 0) {
return type.name() + " [" + extensionLength + " bytes]";
} else {
return type.name();
}
}
}

23
src/main/java/ru/serega6531/packmate/service/optimization/tls/extensions/keyshare/ClientKeyShareExtension.java Normal file
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@@ -0,0 +1,23 @@
package ru.serega6531.packmate.service.optimization.tls.extensions.keyshare;
import org.pcap4j.util.ByteArrays;
import ru.serega6531.packmate.service.optimization.tls.numbers.ExtensionType;
import static org.pcap4j.util.ByteArrays.SHORT_SIZE_IN_BYTES;
public class ClientKeyShareExtension extends KeyShareExtension {
private static final int KEY_SHARE_LENGTH_OFFSET = 0;
private static final int KEY_SHARE_ENTRY_OFFSET = KEY_SHARE_LENGTH_OFFSET + SHORT_SIZE_IN_BYTES;
private short keyShareLength;
public ClientKeyShareExtension(ExtensionType type, byte[] rawData, int offset, short extensionLength) {
super(type, extensionLength);
this.keyShareLength = ByteArrays.getShort(rawData, KEY_SHARE_LENGTH_OFFSET + offset); // the field is not always there
int cursor = KEY_SHARE_ENTRY_OFFSET + offset;
ByteArrays.validateBounds(rawData, cursor + offset, keyShareLength);
readEntries(rawData, KEY_SHARE_ENTRY_OFFSET + offset, offset + keyShareLength);
}
}

37
src/main/java/ru/serega6531/packmate/service/optimization/tls/extensions/keyshare/KeyShareExtension.java
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@@ -7,31 +7,38 @@ import ru.serega6531.packmate.service.optimization.tls.numbers.ExtensionType;
import java.util.ArrayList;
import java.util.List;
import static org.pcap4j.util.ByteArrays.SHORT_SIZE_IN_BYTES;
public abstract class KeyShareExtension extends TlsExtension {
public class KeyShareExtension extends TlsExtension {
private final List<KeyShareEntry> entries = new ArrayList<>();
private static final int KEY_SHARE_LENGTH_OFFSET = 0;
private static final int KEY_SHARE_ENTRY_OFFSET = KEY_SHARE_LENGTH_OFFSET + SHORT_SIZE_IN_BYTES;
public static KeyShareExtension newInstance(ExtensionType type, byte[] rawData, int offset,
short extensionLength, boolean client) {
ByteArrays.validateBounds(rawData, offset, extensionLength);
private short keyShareLength;
private List<KeyShareEntry> entries = new ArrayList<>();
if(client) {
return new ClientKeyShareExtension(type, rawData, offset, extensionLength);
} else {
return new ServerKeyShareExtension(type, rawData, offset, extensionLength);
}
}
public KeyShareExtension(ExtensionType type, byte[] rawData, int offset, short extensionLength) {
protected KeyShareExtension(ExtensionType type, short extensionLength) {
super(type, extensionLength);
}
this.keyShareLength = ByteArrays.getShort(rawData, KEY_SHARE_LENGTH_OFFSET + offset); // the field is not always there
ByteArrays.validateBounds(rawData, KEY_SHARE_ENTRY_OFFSET + offset, keyShareLength);
int cursor = KEY_SHARE_ENTRY_OFFSET + offset;
while (cursor < offset + this.keyShareLength) {
KeyShareEntry entry = new KeyShareEntry(rawData, cursor);
entries.add(entry);
protected void readEntries(byte[] rawData, int cursor, int end) {
while (cursor < end) {
KeyShareEntry entry = readEntry(rawData, cursor);
cursor += entry.size();
}
}
protected KeyShareEntry readEntry(byte[] rawData, int cursor) {
KeyShareEntry entry = new KeyShareEntry(rawData, cursor);
entries.add(entry);
return entry;
}
@Override
public String toString() {
return type.name() + " " + entries.toString();

14
src/main/java/ru/serega6531/packmate/service/optimization/tls/extensions/keyshare/ServerKeyShareExtension.java Normal file
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@@ -0,0 +1,14 @@
package ru.serega6531.packmate.service.optimization.tls.extensions.keyshare;
import ru.serega6531.packmate.service.optimization.tls.numbers.ExtensionType;
public class ServerKeyShareExtension extends KeyShareExtension {
private static final int KEY_SHARE_ENTRY_OFFSET = 0;
public ServerKeyShareExtension(ExtensionType type, byte[] rawData, int offset, short extensionLength) {
super(type, extensionLength);
readEntry(rawData, KEY_SHARE_ENTRY_OFFSET + offset);
}
}

3
src/main/java/ru/serega6531/packmate/service/optimization/tls/records/handshakes/ClientHelloHandshakeRecordContent.java
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@@ -56,7 +56,8 @@ public class ClientHelloHandshakeRecordContent extends HelloHandshakeRecordConte
this.extensionsLength = ByteArrays.getShort(rawData,
EXTENSIONS_LENGTH_OFFSET + compressionMethodsLength + sessionIdLength + cipherSuitesLength + offset);
readExtensions(rawData, EXTENSIONS_OFFSET + compressionMethodsLength + sessionIdLength + cipherSuitesLength + offset);
readExtensions(rawData, EXTENSIONS_OFFSET + compressionMethodsLength +
sessionIdLength + cipherSuitesLength + offset, true);
}
@Override

4
src/main/java/ru/serega6531/packmate/service/optimization/tls/records/handshakes/HelloHandshakeRecordContent.java
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@@ -37,7 +37,7 @@ public abstract class HelloHandshakeRecordContent implements HandshakeRecordCont
}
}
protected void readExtensions(byte[] rawData, int offset) {
protected void readExtensions(byte[] rawData, int offset, boolean client) {
extensions = new ArrayList<>(extensionsLength);
int cursor = offset;
@@ -49,7 +49,7 @@ public abstract class HelloHandshakeRecordContent implements HandshakeRecordCont
short extensionLength = ByteArrays.getShort(rawData, cursor);
cursor += SHORT_SIZE_IN_BYTES;
extensions.add(TlsExtension.newInstance(extensionType, rawData, cursor, extensionLength));
extensions.add(TlsExtension.newInstance(extensionType, rawData, cursor, extensionLength, client));
cursor += extensionLength;
}

2
src/main/java/ru/serega6531/packmate/service/optimization/tls/records/handshakes/ServerHelloHandshakeRecordContent.java
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@@ -32,7 +32,7 @@ public class ServerHelloHandshakeRecordContent extends HelloHandshakeRecordConte
this.extensionsLength = ByteArrays.getShort(rawData,
EXTENSIONS_LENGTH_OFFSET + sessionIdLength + offset);
readExtensions(rawData, EXTENSIONS_OFFSET + sessionIdLength + offset);
readExtensions(rawData, EXTENSIONS_OFFSET + sessionIdLength + offset, false);
}
@Override