最近项目需要选择一套对称加密算法，来满足前后端之间的加解密操作。初步打算前端使用crypto-js来实现，后端使用java本身的加密算法实现,但遇到了一个问题：java本身只支持NoPadding和PKCS5Padding,而crypto-js提供的padding方式没有PKCS5Padding，所以不得以，前后端最终使用PKCS7Padding来实现功能.因此只能通过引入第三方jar包的方式让jave支持pkcs7padding
引入依赖
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<dependency>
<groupId>org.bouncycastle</groupId>
<artifactId>bcprov-jdk16</artifactId>
<version>1.46</version>
</dependency>
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完整代码
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package com.hzjd.miniapp.util;
import java.security.Security;
import java.security.spec.AlgorithmParameterSpec;
import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import org.apache.commons.codec.binary.Base64;
import org.apache.commons.lang.StringUtils;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
import com.sun.istack.internal.NotNull;
public class AESUtil {
private static final String CHARSET_NAME = "UTF-8";
private static final String AES_NAME = "AES";
// 加密模式
public static final String ALGORITHM = "AES/CBC/PKCS7Padding";
// 密钥
public static final String KEY = "1954682168745975";
// 偏移量
public static final String IV = "1954682168745975";
static {
Security.addProvider(new BouncyCastleProvider());
}
/**
* 加密
*
* @param content
* @param key
* @return
*/
public String encrypt(@NotNull String content) {
byte[] result = null;
try {
Cipher cipher = Cipher.getInstance(ALGORITHM);
SecretKeySpec keySpec = new SecretKeySpec(KEY.getBytes(CHARSET_NAME), AES_NAME);
AlgorithmParameterSpec paramSpec = new IvParameterSpec(IV.getBytes());
cipher.init(Cipher.ENCRYPT_MODE, keySpec, paramSpec);
result = cipher.doFinal(content.getBytes(CHARSET_NAME));
} catch (Exception e) {
e.printStackTrace();
}
return Base64.encodeBase64String(result);
}
/**
* 解密
*
* @param content
* @param key
* @return
*/
public String decrypt(@NotNull String content) {
try {
Cipher cipher = Cipher.getInstance(ALGORITHM);
SecretKeySpec keySpec = new SecretKeySpec(KEY.getBytes(CHARSET_NAME), AES_NAME);
AlgorithmParameterSpec paramSpec = new IvParameterSpec(IV.getBytes());
cipher.init(Cipher.DECRYPT_MODE, keySpec, paramSpec);
return new String(cipher.doFinal(Base64.decodeBase64(content)), CHARSET_NAME);
} catch (Exception e) {
e.printStackTrace();
}
return StringUtils.EMPTY;
}
public static void main(String[] args) {
AESUtil aes = new AESUtil();
String contents = "121456465";
String encrypt = aes.encrypt(contents);
System.out.println("加密后:" + encrypt);
String decrypt = aes.decrypt(encrypt);
System.out.println("解密后:" + decrypt);
}
}
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总结
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原文链接：https://www.cnblogs.com/tiro996/archive/2020/08/12/13488237.html