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CYRUS-STUDIOCYRUS-STUDIO
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指令流加密
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‎app/src/main/assets/sign.key

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��\���`���ߖ

‎app/src/main/assets/sign.vmp

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�t����8��9E���Ę�X6 �UJ�Ʌ�ɚ
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K�I��o!]�4�l�Ndaz�*��G�

‎app/src/main/java/com/cyrus/example/vmp/AESUtils.kt

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package com.cyrus.example.vmp
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import android.content.Context
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import java.io.InputStream
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import javax.crypto.Cipher
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import javax.crypto.SecretKey
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import javax.crypto.spec.SecretKeySpec
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object AESUtils {
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private const val ALGORITHM = "AES"
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private const val TRANSFORMATION = "AES/ECB/PKCS5Padding"
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// 从 assets 中读取文件并解密
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fun decryptFileFromAssets(context: Context, vmpFileName: String, keyFileName: String): ByteArray? {
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// 读取密钥文件
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val key = loadKeyFromAssets(context, keyFileName)
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// 读取加密的 vmp 文件
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val encryptedData = readFileFromAssets(context, vmpFileName)
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// 解密
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return decrypt(encryptedData, key)
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}
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// 读取文件内容为字节数组
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private fun readFileFromAssets(context: Context, fileName: String): ByteArray {
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val inputStream: InputStream = context.assets.open(fileName)
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return inputStream.readBytes()
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}
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// 从 assets 中加载密钥文件
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private fun loadKeyFromAssets(context: Context, keyFileName: String): SecretKey {
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val keyBytes = readFileFromAssets(context, keyFileName)
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return SecretKeySpec(keyBytes, ALGORITHM)
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}
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// 解密
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private fun decrypt(data: ByteArray, key: SecretKey): ByteArray {
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val cipher = Cipher.getInstance(TRANSFORMATION)
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cipher.init(Cipher.DECRYPT_MODE, key)
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return cipher.doFinal(data)
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}
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}

‎app/src/main/java/com/cyrus/example/vmp/VMPActivity.kt

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Toast.makeText(this, result, Toast.LENGTH_SHORT).show()
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}
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// Sign算法（指令流加密 VMP）
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findViewById<Button>(R.id.button_sign_vmp_encrypted).setOnClickListener {
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// 解密并执行指令流
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val bytecode = readInstructionFromAssets()
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// 通过 VMP 解析器执行指令流
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if (bytecode != null) {
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val result = SimpleVMP.execute(bytecode, input)
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// 显示 Toast
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Toast.makeText(this, result, Toast.LENGTH_SHORT).show()
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}
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}
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// const-string 指令
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findViewById<Button>(R.id.button_const_string).setOnClickListener {
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// 模拟字节码输入
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}
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private fun readInstructionFromAssets(): ByteArray? {
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// 文件名：在 assets 中放置的加密文件和密钥文件
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val vmpFileName = "sign.vmp"
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val keyFileName = "sign.key"
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// 解密文件
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val decryptedData = AESUtils.decryptFileFromAssets(this, vmpFileName, keyFileName)
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return decryptedData
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}
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}

‎app/src/main/res/layout/activity_vmp.xml

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android:layout_marginTop="12dp"
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android:text="Sign算法（VMP）" />
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<Button
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android:id="@+id/button_sign_vmp_encrypted"
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android:layout_width="wrap_content"
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android:layout_height="wrap_content"
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android:layout_marginTop="12dp"
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android:text="Sign算法（指令流加密 VMP）" />
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<Button
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android:id="@+id/button_const_string"
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android:layout_width="wrap_content"

‎vmp/sign/sign

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‎vmp/src/main/java/com/cyrus/vmp/AESUtils.kt

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package com.cyrus.vmp
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import java.io.ByteArrayOutputStream
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import java.io.File
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import java.io.FileInputStream
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import java.io.FileOutputStream
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import javax.crypto.Cipher
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import javax.crypto.KeyGenerator
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import javax.crypto.SecretKey
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import javax.crypto.spec.SecretKeySpec
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object AESUtils {
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private const val ALGORITHM = "AES"
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private const val TRANSFORMATION = "AES/ECB/PKCS5Padding" // AES 加密模式
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// 生成一个 128 位的 AES 密钥
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fun generateSecretKey(): SecretKey {
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val keyGenerator = KeyGenerator.getInstance(ALGORITHM)
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keyGenerator.init(128) // AES 128 位
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return keyGenerator.generateKey()
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}
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// 使用给定的密钥加密数据
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fun encrypt(data: ByteArray, key: SecretKey): ByteArray {
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val cipher = Cipher.getInstance(TRANSFORMATION)
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cipher.init(Cipher.ENCRYPT_MODE, key)
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return cipher.doFinal(data)
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}
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// 使用给定的密钥解密数据
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fun decrypt(data: ByteArray, key: SecretKey): ByteArray {
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val cipher = Cipher.getInstance(TRANSFORMATION)
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cipher.init(Cipher.DECRYPT_MODE, key)
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return cipher.doFinal(data)
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}
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// 将文件内容加密并导出到新文件
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fun encryptFile(inputFile: File, outputFile: File, keyFile: File) {
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// 读取文件内容
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val fileData = readFile(inputFile)
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// 生成密钥
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val secretKey = generateSecretKey()
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// 加密文件内容
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val encryptedData = encrypt(fileData, secretKey)
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// 保存加密后的数据到新文件（.vmp 文件）
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writeFile(outputFile, encryptedData)
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// 保存密钥到文件
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saveKeyToFile(secretKey, keyFile)
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}
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// 解密文件内容并导出到新文件
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fun decryptFile(inputFile: File, outputFile: File, keyFile: File) {
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// 从文件加载密钥
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val secretKey = loadKeyFromFile(keyFile)
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// 读取加密后的文件内容
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val encryptedData = readFile(inputFile)
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// 解密文件内容
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val decryptedData = decrypt(encryptedData, secretKey)
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// 保存解密后的数据到文件
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writeFile(outputFile, decryptedData)
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}
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// 读取文件内容并返回字节数组
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fun readFile(file: File): ByteArray {
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val fis = FileInputStream(file)
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val baos = ByteArrayOutputStream()
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val buffer = ByteArray(1024)
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var bytesRead: Int
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while (fis.read(buffer).also { bytesRead = it } != -1) {
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baos.write(buffer, 0, bytesRead)
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}
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fis.close()
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return baos.toByteArray()
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}
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// 将字节数组写入到文件
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fun writeFile(file: File, data: ByteArray) {
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val fos = FileOutputStream(file)
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fos.write(data)
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fos.close()
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}
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// 保存密钥到文件
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private fun saveKeyToFile(key: SecretKey, keyFile: File) {
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val fos = FileOutputStream(keyFile)
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fos.write(key.encoded)
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fos.close()
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}
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// 从文件加载密钥
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fun loadKeyFromFile(keyFile: File): SecretKey {
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val keyBytes = ByteArray(keyFile.length().toInt())
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val fis = FileInputStream(keyFile)
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fis.read(keyBytes)
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fis.close()
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return SecretKeySpec(keyBytes, ALGORITHM)
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}
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}

‎vmp/src/main/java/com/cyrus/vmp/SignDecrypt.kt

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package com.cyrus.vmp
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import com.cyrus.vmp.AESUtils.loadKeyFromFile
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import com.cyrus.vmp.AESUtils.readFile
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import com.cyrus.vmp.AESUtils.writeFile
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import java.io.File
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fun main() {
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// 获取工程根目录路径
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val projectRoot = System.getProperty("user.dir")
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// 输入加密文件路径
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val encryptedFile = File(projectRoot, "vmp/sign/sign.vmp")
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// 密钥文件路径
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val keyFile = File(projectRoot, "vmp/sign/sign.key")
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// 输出解密文件路径
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val decryptedFile = File(projectRoot, "vmp/sign/sign_")
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try {
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// 从文件加载密钥
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val secretKey = loadKeyFromFile(keyFile)
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// 解密文件
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val encryptedData = readFile(encryptedFile)
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val decryptedData: ByteArray = AESUtils.decrypt(encryptedData, secretKey)
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// 保存解密后的文件
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writeFile(decryptedFile, decryptedData)
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println("File decryption completed, saved as: ${decryptedFile.absolutePath}")
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} catch (e: Exception) {
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e.printStackTrace()
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}
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}

‎vmp/src/main/java/com/cyrus/vmp/SignEncrypt.kt

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package com.cyrus.vmp
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import java.io.File
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fun main() {
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// 获取工程根目录路径
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val projectRoot = System.getProperty("user.dir")
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// 设置相对路径
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val encryptedFile = File(projectRoot, "vmp/sign/sign.vmp") // 相对路径
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val keyFile = File(projectRoot, "vmp/sign/sign.key") // 相对路径
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// 输入文件路径
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val inputFile = File(projectRoot, "vmp/sign/sign") // 需要加密的文件
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try {
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// 使用 AES 加密文件
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AESUtils.encryptFile(inputFile, encryptedFile, keyFile)
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println("File encryption completed, saved as: ${encryptedFile.absolutePath}")
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println("Key saved as: ${keyFile.absolutePath}")
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} catch (e: Exception) {
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e.printStackTrace()
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}
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}

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