java和js實現aes加密解密


由於公司安全測試,要對重要信息進行加密傳輸,使得java、android、ios一致。

java代碼

package gov.communitycloud.user.utils;

import java.math.BigInteger;

import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.spec.SecretKeySpec;

import org.apache.commons.codec.binary.Base64;
import org.apache.commons.lang3.StringUtils;

import sun.misc.BASE64Decoder;

/**
* 編碼工具類
* 實現aes加密、解密
*/
public class EncryptUtils {

/**
* 密鑰
*/
private static final String KEY = "abcdefgabcdefg12";

/**
* 算法
*/
private static final String ALGORITHMSTR = "AES/ECB/PKCS5Padding";

public static void main(String[] args) throws Exception {
String content = "我愛你";
System.out.println("加密前:" + content);

System.out.println("加密密鑰和解密密鑰:" + KEY);

String encrypt = aesEncrypt(content, KEY);
System.out.println("加密后:" + encrypt);

String decrypt = aesDecrypt(encrypt, KEY);
System.out.println("解密后:" + decrypt);
}

/**
* aes解密
* @param encrypt 內容
* @return
* @throws Exception
*/
public static String aesDecrypt(String encrypt) throws Exception {
return aesDecrypt(encrypt, KEY);
}

/**
* aes加密
* @param content
* @return
* @throws Exception
*/
public static String aesEncrypt(String content) throws Exception {
return aesEncrypt(content, KEY);
}

/**
* 將byte[]轉為各種進制的字符串
* @param bytes byte[]
* @param radix 可以轉換進制的范圍,從Character.MIN_RADIX到Character.MAX_RADIX,超出范圍后變為10進制
* @return 轉換后的字符串
*/
public static String binary(byte[] bytes, int radix){
return new BigInteger(1, bytes).toString(radix);// 這里的1代表正數
}

/**
* base 64 encode
* @param bytes 待編碼的byte[]
* @return 編碼后的base 64 code
*/
public static String base64Encode(byte[] bytes){
return Base64.encodeBase64String(bytes);
}

/**
* base 64 decode
* @param base64Code 待解碼的base 64 code
* @return 解碼后的byte[]
* @throws Exception
*/
public static byte[] base64Decode(String base64Code) throws Exception{
return StringUtils.isEmpty(base64Code) ? null : new BASE64Decoder().decodeBuffer(base64Code);
}


/**
* AES加密
* @param content 待加密的內容
* @param encryptKey 加密密鑰
* @return 加密后的byte[]
* @throws Exception
*/
public static byte[] aesEncryptToBytes(String content, String encryptKey) throws Exception {
KeyGenerator kgen = KeyGenerator.getInstance("AES");
kgen.init(128);
Cipher cipher = Cipher.getInstance(ALGORITHMSTR);
cipher.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(encryptKey.getBytes(), "AES"));

return cipher.doFinal(content.getBytes("utf-8"));
}


/**
* AES加密為base 64 code
* @param content 待加密的內容
* @param encryptKey 加密密鑰
* @return 加密后的base 64 code
* @throws Exception
*/
public static String aesEncrypt(String content, String encryptKey) throws Exception {
return base64Encode(aesEncryptToBytes(content, encryptKey));
}

/**
* AES解密
* @param encryptBytes 待解密的byte[]
* @param decryptKey 解密密鑰
* @return 解密后的String
* @throws Exception
*/
public static String aesDecryptByBytes(byte[] encryptBytes, String decryptKey) throws Exception {
KeyGenerator kgen = KeyGenerator.getInstance("AES");
kgen.init(128);

Cipher cipher = Cipher.getInstance(ALGORITHMSTR);
cipher.init(Cipher.DECRYPT_MODE, new SecretKeySpec(decryptKey.getBytes(), "AES"));
byte[] decryptBytes = cipher.doFinal(encryptBytes);

return new String(decryptBytes);
}


/**
* 將base 64 code AES解密
* @param encryptStr 待解密的base 64 code
* @param decryptKey 解密密鑰
* @return 解密后的string
* @throws Exception
*/
public static String aesDecrypt(String encryptStr, String decryptKey) throws Exception {
return StringUtils.isEmpty(encryptStr) ? null : aesDecryptByBytes(base64Decode(encryptStr), decryptKey);
}

}

js代碼

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>aes測試</title>
<script type="text/javascript" src="aes.js"></script>
<script type="text/javascript" src="../components/mode-ecb.js"></script>
</head>
<body>

</body>

<script type="text/javascript">


function Encrypt(word){
var key = CryptoJS.enc.Utf8.parse("abcdefgabcdefg12");

var srcs = CryptoJS.enc.Utf8.parse(word);
var encrypted = CryptoJS.AES.encrypt(srcs, key, {mode:CryptoJS.mode.ECB,padding: CryptoJS.pad.Pkcs7});
return encrypted.toString();
}
function Decrypt(word){
var key = CryptoJS.enc.Utf8.parse("abcdefgabcdefg12");

var decrypt = CryptoJS.AES.decrypt(word, key, {mode:CryptoJS.mode.ECB,padding: CryptoJS.pad.Pkcs7});
return CryptoJS.enc.Utf8.stringify(decrypt).toString();
}

alert(Encrypt("我愛你"));
alert(Decrypt(Encrypt("我愛你")))

</script>
</html>

注意點
  1. js中需要引入CryptoJS的架包,下載地址:點擊跳轉地址
  2. 使用aes時,js代碼不要暴漏在外面,不然key會被拿到
  3. PKCS5Padding和PKCS7Padding的結果是一樣



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