线程“main”中的exceptionjava.security.InvalidKeyException：非法的键大小或默认参数
下面的代码抛出此错误消息：
Exception in thread "main" java.security.InvalidKeyException: Illegal key size or default parameters
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？
可能你还没有安装JCE Policy文件。
下载此文件：
-
Java 6
-
Java 7
-
Java 8
并在${java.home}/jre/lib/security/.安装该文件${java.home}/jre/lib/security/.
${java.home}指的是Java的安装目录
对于mac：
- 开放式发现者
- 按命令 + shift + g
- type
/Library/Java/JavaVirtualMachines - 导航到您的JDK版本
- 然后是
Contents/Home/jre/lib/security - 解压缩下载的文件并将所有文件放在此处
用于CLI
unzip downloaded_policy_file.zip -d /Library/Java/JavaVirtualMachines//Contents/Home/jre/lib/security/ mv /Library/Java/JavaVirtualMachines/ /Contents/Home/jre/lib/security/UnlimitedJCEPolicyJDK/* /Library/Java/JavaVirtualMachines//Contents/Home/jre/lib/security rm -rf Library/Java/JavaVirtualMachines/ /Contents/Home/jre/lib/security/UnlimitedJCEPolicyJDK/
从此链接下载JCE for Java 7 http://www.oracle.com/technetwork/java/javase/downloads/jce-7-download-432124.html
并打开路径C:\Program Files\Java\jdk1.7.0_80\jre\lib\security并粘贴这两个jar子。（即使两个jar子已经存在， C:\Program Files\Java\jdk1.7.0_80\jre\lib\security替换这两个jar子）
对于JAVA 7，下载链接是jce-7-download
将两个下载的jar复制到Java \ jdk1.7.0_10 \ jre \ lib \ security中。将旧jar的备份放在更安全的一侧。
如果您使用自制的Mac
brew cask install jce-unlimited-strength-policy
从JDK 1.8u151开始，没有必要单独下载JCE库。 只需编辑：
$JDK_HOME/jre/lib/security/java.security
并取消注释该行：
crypto.policy=unlimited