小编Luk*_*fer的帖子

我有很多非常小的数据(19字节)需要加密并通过tcp以加密格式发送到远程服务器.我正在使用下面的代码来执行此操作.

package aesclient;

import java.io.OutputStream;
import java.net.Socket;

import java.security.SecureRandom;
import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;

public class AESClient {
    static byte[] plaintext = new byte[] {0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, 0x50, 0x51, 0x52, 0x53};
    public static void main(String[] args) {
        try {
            Socket socket = new Socket("127.0.0.1", 1337); // connecting to server on localhost
            OutputStream outputStream = socket.getOutputStream();
            Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5PADDING");
            String s_key = "Random09" + "Random09"; // 16 …

我有 Java AES GCM 加密问题。我已按照此页面上的说明生成以下代码：

package aes;

import java.nio.ByteBuffer;
import java.security.SecureRandom;
import javax.crypto.Cipher;
import javax.crypto.spec.GCMParameterSpec;
import javax.crypto.spec.SecretKeySpec;

public class AES {
    private Cipher encryptCipher;
    private Cipher decryptCipher;
    private byte[] key;
    private int keyLength;
    private SecretKeySpec keySpec;
    private SecureRandom random;

    public AES(String key) {
        try {
            this.key = key.getBytes();
            this.keyLength = this.key.length*8; // key length in bits
            this.keySpec = new SecretKeySpec(this.key, "AES");
            this.encryptCipher = Cipher.getInstance("AES/GCM/NoPadding");
            this.decryptCipher = Cipher.getInstance("AES/GCM/NoPadding");
            this.random = SecureRandom.getInstance("SHA1PRNG");
        }
        catch (Exception e) {
            System.err.println(e.getMessage());
        }
    } …