Embed AES/RSA/SHA-1 crypto implementation

example/JavaSocketNetworkEngine.kt

@@ -0,0 +1,89 @@
+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/9/7
+ */
+
+
+package engines
+
+import cn.rtast.libmc.network.RawSocket
+import cn.rtast.libmc.network.ReadChannel
+import cn.rtast.libmc.network.SocketEngine
+import cn.rtast.libmc.network.WriteChannel
+import java.io.InputStream
+import java.io.OutputStream
+import java.net.InetSocketAddress
+import java.net.Socket
+
+class JavaSocketEngine : SocketEngine {
+    override fun create(host: String, port: Int): RawSocket = JavaNetworkSocket(host, port)
+}
+
+class JavaNetworkSocket(
+    private val host: String,
+    private val port: Int,
+    private val connectTimeoutMs: Int = 10000,
+) : RawSocket {
+    private lateinit var socket: Socket
+    private lateinit var readChannel: JavaReadChannel
+    private lateinit var writeChannel: JavaWriteChannel
+
+    override suspend fun connect() {
+        val s = Socket()
+        s.tcpNoDelay = true
+        s.connect(InetSocketAddress(host, port), connectTimeoutMs)
+
+        socket = s
+        readChannel = JavaReadChannel(s.getInputStream())
+        writeChannel = JavaWriteChannel(s.getOutputStream())
+    }
+
+    override fun openReadChannel(): ReadChannel = readChannel
+    override fun openWriteChannel(): WriteChannel = writeChannel
+
+    override fun close() {
+        if (::socket.isInitialized && !socket.isClosed) {
+            runCatching { socket.close() }
+        }
+    }
+}
+
+class JavaReadChannel(private val inputStream: InputStream) : ReadChannel {
+    override suspend fun readByte(): Byte {
+        val b = inputStream.read()
+        if (b == -1) throw IllegalStateException("Socket stream reached EOF while reading byte")
+        return b.toByte()
+    }
+
+    override suspend fun readBytes(length: Int): ByteArray {
+        val buffer = ByteArray(length)
+        readFullyInternal(buffer, 0, length)
+        return buffer
+    }
+
+    override suspend fun readFully(out: ByteArray, start: Int, end: Int) {
+        readFullyInternal(out, start, end - start)
+    }
+
+    private fun readFullyInternal(out: ByteArray, offset: Int, length: Int) {
+        var bytesRead = 0
+        while (bytesRead < length) {
+            val count = inputStream.read(out, offset + bytesRead, length - bytesRead)
+            if (count == -1) {
+                throw IllegalStateException("Socket stream closed unexpectedly (read $bytesRead of $length bytes)")
+            }
+            bytesRead += count
+        }
+    }
+}
+
+class JavaWriteChannel(private val outputStream: OutputStream) : WriteChannel {
+    override suspend fun writeFully(value: ByteArray, startIndex: Int, endIndex: Int) {
+        outputStream.write(value, startIndex, endIndex - startIndex)
+    }
+
+    override suspend fun flush() {
+        outputStream.flush()
+    }
+}