下面的代码是抛出这个错误信息：
线程中的异常“main”java.security.InvalidKeyException：非法键大小或默认参数
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;
有人知道为什么我得到这个错误吗？
解决方法
可能你还没有安装JCE策略文件.
下载此文件：
> Java 6
> Java 7
> Java 8
并将文件安装在${java.home} / jre / lib / security /中.
${java.home}指Java的安装目录
对于mac：
>打开查找器
>按命令shift g
>类型/库/ 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这里
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>/