线程“main”中的异常 java.security.InvalidKeyException：非法密钥大小或默认参数
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Exception in thread "main" java.security.InvalidKeyException: Illegal key size or default parameters
提问by user2968404
The code belows is throwing this error message:
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
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;
Does anybody know why I get that error?
有人知道我为什么会收到那个错误吗？
回答by CodeFanatic
Probably you did not install the JCE Policy file yet.
可能您还没有安装 JCE 策略文件。
Download this file:
下载此文件：
And Install the file in ${java.home}/jre/lib/security/.
并将文件安装在 ${java.home}/jre/lib/security/.
${java.home}refers to your installation directory of Java
${java.home}指的是你的Java安装目录
for mac:
对于 Mac：
- 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
- 打开取景器
- 按command+ shift+g
- 类型
/Library/Java/JavaVirtualMachines - 导航到您的 JDK 版本
- 然后
Contents/Home/jre/lib/security - 解压缩下载的文件并将所有文件放在此处
for CLI
命令行界面
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>/
回答by Rajeev
For JAVA 7 the download link is jce-7-download
对于 JAVA 7，下载链接是jce-7-download
Copy the two downloaded jars in Java\jdk1.7.0_10\jre\lib\security Take a backup of older jars to be on safer side.
将下载的两个 jar 复制到 Java\jdk1.7.0_10\jre\lib\security 备份旧的 jar 以确保安全。
回答by Lucky
Download the JCE for Java 7 from this link http://www.oracle.com/technetwork/java/javase/downloads/jce-7-download-432124.html
从此链接下载 Java 7 的 JCE http://www.oracle.com/technetwork/java/javase/downloads/jce-7-download-432124.html
and open the path C:\Program Files\Java\jdk1.7.0_80\jre\lib\securityand paste the two jars here.(Even if the two jars were already present replace those two jars)
并打开路径C:\Program Files\Java\jdk1.7.0_80\jre\lib\security并将两个罐子粘贴到此处。（即使两个罐子已经存在，也请替换这两个罐子）
回答by Neftanic
In case you using Mac with homebrew
如果您使用带有自制软件的 Mac
brew cask install jce-unlimited-strength-policy
回答by Fredric Doddridge
As of JDK 1.8u151 it is not necessary to download the JCE libraries separately. Simply edit:
从 JDK 1.8u151 开始，不需要单独下载 JCE 库。简单编辑：
$JDK_HOME/jre/lib/security/java.security
and uncomment the line:
并取消注释该行：
crypto.policy=unlimited
