jdk加密无政策限制jar包及示例

## 文件使用说明 jdk6、jdk7、jdk8目录中分别是其对应版本的高位秘钥加密需要的无限制的jar包，根据自己的jdk版本选择一个就可以了。zip文件是对应的原包。 2个jar包分别是local_policy.jar、US_export_policy.jar，拷贝到JDK安装目录下的jdk目录下的jre目录下的lib目录下的security目录下。之前的同名包记得备份。 Windows下大概就是C:\Program Files\Java\jdk1.8.0_121\jre\lib\security这个目录。 如果，在加密算法中遇到：Illegal key size or default parameters这个错误，可能你就需要无限制文件了。 ## 官方无政策限制权限包下载地址 [jdk6](https://www.oracle.com/technetwork/java/javase/downloads/jce-6-download-429243.html) [jdK7](https://www.oracle.com/technetwork/java/javase/downloads/jce-7-download-432124.html) [jdk8](https://www.oracle.com/technetwork/java/javase/downloads/jce8-download-2133166.html) ## AES示例代码 ```java package org.curitis.symmetrical; import org.bouncycastle.jce.provider.BouncyCastleProvider; import javax.crypto.*; import javax.crypto.spec.SecretKeySpec; import java.security.InvalidKeyException; import java.security.NoSuchAlgorithmException; import java.security.NoSuchProviderException; import java.security.Security; import java.security.spec.InvalidKeySpecException; /** * AES(Advance Encryption Standard,高级数据加密标准) * * Java7 BouncyCastle * 秘钥长度 128、192、256 128、192、256 * * 默认秘钥长度 128 128 * * 工作模式 ECB CBC PCBC CTR CTS CFB CFB8至CFB128 OFB OFB8至OFB128 | 相同 * * 填充方式 NoPadding PKCS5Padding ISO10126Padding | PKCS7Padding ZeroBytePadding * * Java7 256位秘钥需要获取无政策限制权限文件,下载地址：放在jdk/jre/lib/security目录下 * jdk6:https://www.oracle.com/technetwork/java/javase/downloads/jce-6-download-429243.html * jdk7:https://www.oracle.com/technetwork/java/javase/downloads/jce-7-download-432124.html * jdk8:https://www.oracle.com/technetwork/java/javase/downloads/jce8-download-2133166.html */ public class AES { public static final String ALGORITHM = "AES"; public static final String CIPHER_ALGORITHM = "AES/ECB/PKCS5Padding"; public static byte[] decrypt(byte[] data,byte[] key) throws NoSuchAlgorithmException, InvalidKeyException, InvalidKeySpecException, NoSuchPaddingException, BadPaddingException, IllegalBlockSizeException { SecretKey secretKey = tokey(key); Cipher cipher = Cipher.getInstance(CIPHER_ALGORITHM); cipher.init(Cipher.DECRYPT_MODE,secretKey); return cipher.doFinal(data); } public static byte[] encrypt(byte[] data,byte[] key) throws NoSuchAlgorithmException, InvalidKeyException, InvalidKeySpecException, NoSuchPaddingException, BadPaddingException, IllegalBlockSizeException { SecretKey secretKey = tokey(key); Cipher cipher = Cipher.getInstance(CIPHER_ALGORITHM); cipher.init(Cipher.ENCRYPT_MODE,secretKey); return cipher.doFinal(data); } private static SecretKey tokey(byte[] key) throws NoSuchAlgorithmException, InvalidKeySpecException, InvalidKeyException { SecretKeySpec secretKeySpec = new SecretKeySpec(key, ALGORITHM); return secretKeySpec; } public static byte[] initKey() throws NoSuchAlgorithmException { KeyGenerator keyGenerator = KeyGenerator.getInstance(ALGORITHM); keyGenerator.init(256); SecretKey key = keyGenerator.generateKey(); byte[] encoded = key.getEncoded();//秘钥二进制编码 return encoded; } public static byte[] initBCKey() throws NoSuchProviderException, NoSuchAlgorithmException { KeyGenerator keyGenerator = KeyGenerator.getInstance(ALGORITHM, "BC"); keyGenerator.init(256); SecretKey key = keyGenerator.generateKey(); byte[] encoded = key.getEncoded();//秘钥二进制编码 return encoded; } public static byte[] initBCTwoKey() throws NoSuchProviderException, NoSuchAlgorithmException { Security.addProvider(new BouncyCastleProvider()); KeyGenerator keyGenerator = KeyGenerator.getInstance(ALGORITHM); keyGenerator.init(256); SecretKey key = keyGenerator.generateKey(); byte[] encoded = key.getEncoded();//秘钥二进制编码 return encoded; } } ``` 使用Bouncy Castle需要引入jar包，根据自己需要修改版本： ```xml <dependency> <groupId>org.bouncycastle</groupId> <artifactId>bcprov-jdk15on</artifactId> <version>1.60</version> </dependency> ```