请教这个怎么算出IV

qzbbs

package com.base.utils.http.impl;

import java.io.PrintStream;
import java.net.URLEncoder;
import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;

public final class a
{
  static byte[] a = { 85, 60, 12, 116, 99, -67, -83, 19, -118, -73, -24, -8, 82, -24, -56, -14 };
  static String b = "china1233_aeskey";

  public static String Decrypt(String paramString1, String paramString2)
  {
    if (paramString2 == null)
    {
      System.out.print("Key为空null");
      return null;
    }
    if (paramString2.length() != 16)
    {
      System.out.print("Key长度不是16位");
      return null;
    }
    SecretKeySpec localSecretKeySpec = new SecretKeySpec(paramString2.getBytes("ASCII"), "AES");
    Cipher localCipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
    localCipher.init(2, localSecretKeySpec, new IvParameterSpec(a));
    return new String(localCipher.doFinal(b.decode(paramString1, 0)));
  }

  public static String Encrypt(String paramString)
  {
    if (b == null)
    {
      System.out.print("Key为空null");
      return null;
    }
    if (b.length() != 16)
    {
      System.out.print("Key长度不是16位");
      return null;
    }
    System.out.println("------加密-----------");
    SecretKeySpec localSecretKeySpec = new SecretKeySpec(b.getBytes(), "AES");
    Cipher localCipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
    localCipher.init(1, localSecretKeySpec, new IvParameterSpec(a));
    return b.encodeToString(localCipher.doFinal(paramString.getBytes("UTF-8")), 0);
  }

  public static void main(String[] paramArrayOfString)
  {
    System.out.println("加密前：" + "AAAAAABBBBBBCCCCC");
    long l1 = System.currentTimeMillis();
    try
    {
      String str1 = Encrypt("AAAAAABBBBBBCCCCC");
      System.out.println("密文是：" + str1);
      long l2 = System.currentTimeMillis() - l1;
      System.out.println("加密耗时：" + l2 + "毫秒");
      System.out.println("密文URLEncode后是：" + URLEncoder.encode(str1, "UTF-8"));
      long l3 = System.currentTimeMillis();
      String str2 = Decrypt(str1, b);
      System.out.println("解密后的明文是：" + str2);
      long l4 = System.currentTimeMillis() - l3;
      System.out.println("解密耗时：" + l4 + "毫秒");
      return;
    }
    catch (Exception localException)
    {
      localException.printStackTrace();
    }
  }
}

ps122

new IvParameterSpec(a)
static byte[] a = { 85, 60, 12, 116, 99, -67, -83, 19, -118, -73, -24, -8, 82, -24, -56, -14 };
这不很明显了吗，还求啥

qzbbs

ps122 发表于 2020-2-13 11:18
new IvParameterSpec(a)
static byte[] a = { 85, 60, 12, 116, 99, -67, -83, 19, -118, -73, -24, -8,  ...

大神，请问怎么转换成16字节？