线程“main”中的异常java.security.InvalidKeyException：非法的密钥大小或默认参数 [英] Exception in thread "main" java.security.InvalidKeyException: Illegal key size or default parameters

问题描述

以下代码抛出此错误消息：

The code belows is throwing this error message:

线程main中的异常java.security.InvalidKeyException：非法密钥大小或默认值参数

Cipher dcipher;

byte[] salt = new String("12345678").getBytes();
int iterationCount = 1024;
int keyStrength = 256;
SecretKey key;
byte[] iv;

Decrypter(String passPhrase) throws Exception {
    SecretKeyFactory factory = SecretKeyFactory
            .getInstance("PBKDF2WithHmacSHA1");
    System.out.println("factory +" + factory);
    KeySpec spec = new PBEKeySpec(passPhrase.toCharArray(), salt,
            iterationCount, keyStrength);
    System.out.println("spec  " + spec);
    SecretKey tmp = factory.generateSecret(spec);
    System.out.println();
    key = new SecretKeySpec(tmp.getEncoded(), "AES");
    dcipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
}

public String encrypt(String data) throws Exception {
    dcipher.init(Cipher.ENCRYPT_MODE, key);
    AlgorithmParameters params = dcipher.getParameters();
    iv = params.getParameterSpec(IvParameterSpec.class).getIV();
    byte[] utf8EncryptedData = dcipher.doFinal(data.getBytes());
    String base64EncryptedData = new sun.misc.BASE64Encoder()
            .encodeBuffer(utf8EncryptedData);

    System.out.println("IV "
            + new sun.misc.BASE64Encoder().encodeBuffer(iv));
    System.out.println("Encrypted Data " + base64EncryptedData);
    return base64EncryptedData;

有人知道我为什么会收到这个错误吗？

Does anybody know why I get that error?

推荐答案

可能您还没有安装JCE策略文件。

Probably you did not install the JCE Policy file yet.

下载此文件：

• Java 6

Java 7

Java 8

并在 $ {java.home} / jre / lib / security /中安装文件。

$ {java.home} 指的是Java的安装目录

${java.home} refers to your installation directory of Java

for mac：

• open finder


• 按命令 + shift + g


• 类型 / Library / Java / JavaVirtualMachines


• 导航到您的JDK版本


• 然后目录/主页/ jre / lib / security


• 解压缩下载的文件并将所有文件放入ide here

• open finder
• press command + shift + g
• type /Library/Java/JavaVirtualMachines
• navigate to your version of JDK
• then Contents/Home/jre/lib/security
• unzip the downloaded file and place all files inside here

用于CLI

unzip downloaded_policy_file.zip  -d /Library/Java/JavaVirtualMachines/<JDK_VERSION>/Contents/Home/jre/lib/security/

mv /Library/Java/JavaVirtualMachines/<JDK_VERSION>/Contents/Home/jre/lib/security/UnlimitedJCEPolicyJDK<VERSION>/* /Library/Java/JavaVirtualMachines/<JDK_VERSION>/Contents/Home/jre/lib/security  

rm -rf Library/Java/JavaVirtualMachines/<JDK_VERSION>/Contents/Home/jre/lib/security/UnlimitedJCEPolicyJDK<VERSION>/

这篇关于线程“main”中的异常java.security.InvalidKeyException：非法的密钥大小或默认参数的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！