Reapply "[F] Fix aimedb memory leak"

This reverts commit fec3480963.

src/main/java/icu/samnyan/aqua/sega/aimedb/AimeDB.kt

@@ -46,7 +46,7 @@ class AimeDB(
         keychipId = readPaddedString(12u)       // 14 12b
     )
 
-    fun ByteBuf.readPaddedString(maxLen: UInt) = readBytes(maxLen.toInt()).toString(US_ASCII).trimEnd('\u0000')
+    fun ByteBuf.readPaddedString(maxLen: UInt) = readCharSequence(maxLen.toInt(), US_ASCII).toString().trimEnd('\u0000')
 
     data class Handler(val name: String, val fn: (ByteBuf) -> ByteBuf?)
 

src/main/java/icu/samnyan/aqua/sega/aimedb/AimeDbDecoder.kt

@@ -28,8 +28,11 @@ class AimeDbDecoder : ByteToMessageDecoder() {
 
         // Create a byte array to store the encrypted data
         val d = input.readBytes(length)
-        val result = AimeDbEncryption.decrypt(d)
+        val result = try {
-        d.release()
+            AimeDbEncryption.decrypt(d)
+        } finally {
+            d.release()
+        }
 
         val resultMap = mapOf(
             "type" to result.getShortLE(0x04).toInt(),
@@ -50,13 +53,16 @@ class AimeDbDecoder : ByteToMessageDecoder() {
     private fun getLength(input: ByteBuf): Int = try {
         val currentPos = input.readerIndex()
         val result = AimeDbEncryption.decrypt(input)
+        try {
+            // Check the header
+            val header = result.getByte(0).toInt()
+            assert(header == 0x3e) { "AimeDB: Invalid header $header" }
 
-        // Check the header
+            // Read the length from offset 6
-        val header = result.getByte(0).toInt()
+            result.getShortLE(currentPos + 6).toInt()
-        assert(header == 0x3e) { "AimeDB: Invalid header $header" }
+        } finally {
-
+            result.release()
-        // Read the length from offset 6
+        }
-        result.getShortLE(currentPos + 6).toInt()
     } catch (e: Exception) {
         logger.info("AimeDB: Invalid request received")
         logger.debug("AimeDB: Invalid request received: ${input.toString(Charsets.UTF_8)}")