前后端AES加密解密 前端使用CryptoJS 后端Java实现

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前端使用CryptoJS

下载CryptoJS, Github : https://github.com/brix/crypto-js

一、使用CBC模式

1、前端实现

引入JS

<script src="./js/crypto-js.js"></script>
<script src="./js/aes.js"></script>
<script>
    var key = '3132333435363738393041424344454631323334353637383930414243444566';
     console.log('密钥:', key);
     key = CryptoJS.enc.Hex.parse(key)
     iv = CryptoJS.enc.Hex.parse("30313233343536373839414243444546")
     var src = "werty7890";
     console.log('原字符串:', src);
     var enc = CryptoJS.AES.encrypt(src ,key,{
         iv:iv,
         mode: CryptoJS.mode.CBC,  
         padding: CryptoJS.pad.Pkcs7
     })

     //console.log('加密:',enc.toString());
     var enced = enc.ciphertext.toString()
     console.log("加密:", enced);

     var dec = CryptoJS.AES.decrypt(CryptoJS.format.Hex.parse(enced), key,{
         iv:iv,
         mode: CryptoJS.mode.CBC,  
         padding: CryptoJS.pad.Pkcs7
     })
     console.log('解密:',CryptoJS.enc.Utf8.stringify(dec));
</script>
这里写图片描述

结果:

2、后端Java实现


import java.io.UnsupportedEncodingException;
import java.nio.charset.Charset;
import java.security.InvalidAlgorithmParameterException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;

import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.KeyGenerator;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.SecretKey;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;

public class AES {

    private static String iv = "0123456789ABCDEF";//偏移量字符串必须是16位 当模式是CBC的时候必须设置偏移量
    private static String Algorithm = "AES";
    private static String AlgorithmProvider = "AES/CBC/PKCS5Padding"; //算法/模式/补码方式

    public static byte[] generatorKey() throws NoSuchAlgorithmException {
        KeyGenerator keyGenerator = KeyGenerator.getInstance(Algorithm);
        keyGenerator.init(256);//默认128,获得无政策权限后可为192或256
        SecretKey secretKey = keyGenerator.generateKey();
        return secretKey.getEncoded();
    }

    public static IvParameterSpec getIv() throws UnsupportedEncodingException {
        IvParameterSpec ivParameterSpec = new IvParameterSpec(iv.getBytes("utf-8"));
        System.out.println("偏移量:"+byteToHexString(ivParameterSpec.getIV()));
        return ivParameterSpec;
    }

    public static byte[] encrypt(String src, byte[] key) throws NoSuchAlgorithmException, NoSuchPaddingException,
            InvalidKeyException, IllegalBlockSizeException, BadPaddingException, UnsupportedEncodingException, InvalidAlgorithmParameterException {
        SecretKey secretKey = new SecretKeySpec(key, Algorithm);
        IvParameterSpec ivParameterSpec = getIv();
        Cipher cipher = Cipher.getInstance(AlgorithmProvider);
        cipher.init(Cipher.ENCRYPT_MODE, secretKey, ivParameterSpec);
        byte[] cipherBytes = cipher.doFinal(src.getBytes(Charset.forName("utf-8")));
        return cipherBytes;
    }

    public static byte[] decrypt(String src, byte[] key) throws Exception {
        SecretKey secretKey = new SecretKeySpec(key, Algorithm);

        IvParameterSpec ivParameterSpec = getIv();
        Cipher cipher = Cipher.getInstance(AlgorithmProvider);
        cipher.init(Cipher.DECRYPT_MODE, secretKey, ivParameterSpec);
        byte[] hexBytes = hexStringToBytes(src);
        byte[] plainBytes = cipher.doFinal(hexBytes);
        return plainBytes;
    }

    /**
     * 将byte转换为16进制字符串
     * @param src
     * @return
     */
    public static String byteToHexString(byte[] src) {
        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < src.length; i++) {
            int v = src[i] & 0xff;
            String hv = Integer.toHexString(v);
            if (hv.length() < 2) {
                sb.append("0");
            }
            sb.append(hv);
        }
        return sb.toString();
    }

    /**
     * 将16进制字符串装换为byte数组
     * @param hexString
     * @return
     */
    public static byte[] hexStringToBytes(String hexString) {
        hexString = hexString.toUpperCase();
        int length = hexString.length() / 2;
        char[] hexChars = hexString.toCharArray();
        byte[] b = new byte[length];
        for (int i = 0; i < length; i++) {
            int pos = i * 2;
            b[i] = (byte) (charToByte(hexChars[pos]) << 4 | charToByte(hexChars[pos + 1]));
        }
        return b;
    }

    private static byte charToByte(char c) {
        return (byte) "0123456789ABCDEF".indexOf(c);
    }

    public static void main(String[] args) {
        try {
            // byte key[] = generatorKey();
            // 密钥必须是16的倍数
            byte key[] = "1234567890ABCDEF1234567890ABCDEf".getBytes("utf-8");//hexStringToBytes("0123456789ABCDEF");
            String src = "werty7890";
            System.out.println("密钥:"+byteToHexString(key));
            System.out.println("原字符串:"+src);

            String enc = byteToHexString(encrypt(src, key));
            System.out.println("加密:"+enc);
            System.out.println("解密:"+new String(decrypt(enc, key), "utf-8"));
        } catch (InvalidKeyException e) {
            e.printStackTrace();
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        } catch (NoSuchPaddingException e) {
            e.printStackTrace();
        } catch (IllegalBlockSizeException e) {
            e.printStackTrace();
        } catch (BadPaddingException e) {
            e.printStackTrace();
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}
这里写图片描述

结果

二、使用ECB模式

1、前端实现

引入JS

<script src="./js/crypto-js.js"></script>
<script src="./js/aes.js"></script>
<script>
   var key = '3132333435363738393041424344454631323334353637383930414243444566';
   console.log('密钥:', key);
   key = CryptoJS.enc.Hex.parse(key)
   //iv = CryptoJS.enc.Hex.parse("30313233343536373839414243444546")
   //console.log('偏移量:',CryptoJS.enc.Hex.stringify(iv));
   var src = "werty7890";
   console.log('原字符串:', src);
   var enc = CryptoJS.AES.encrypt(src ,key,{
       //iv:iv,
       mode: CryptoJS.mode.ECB,  
       padding: CryptoJS.pad.Pkcs7
   })

   //console.log('加密:',enc.toString());
   var enced = enc.ciphertext.toString()
   console.log("加密:", enced);

   var dec = CryptoJS.AES.decrypt(CryptoJS.format.Hex.parse(enced), key,{
       //iv:iv,
       mode: CryptoJS.mode.ECB,  
       padding: CryptoJS.pad.Pkcs7
   })
   console.log('解密:',CryptoJS.enc.Utf8.stringify(dec));
</script>
这里写图片描述

结果:

2、后端实现


import java.io.UnsupportedEncodingException;
import java.nio.charset.Charset;
import java.security.InvalidAlgorithmParameterException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;

import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.KeyGenerator;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.SecretKey;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;

public class AES {

    private static String iv = "0123456789ABCDEF";//偏移量字符串必须是16位 当模式是CBC的时候必须设置偏移量
    private static String Algorithm = "AES";
    private static String AlgorithmProvider = "AES/ECB/PKCS5Padding"; // 算法/模式/补码方式

    public static byte[] generatorKey() throws NoSuchAlgorithmException {
        KeyGenerator keyGenerator = KeyGenerator.getInstance(Algorithm);
        keyGenerator.init(256);//默认128,获得无政策权限后可为192或256
        SecretKey secretKey = keyGenerator.generateKey();
        return secretKey.getEncoded();
    }

    public static IvParameterSpec getIv() throws UnsupportedEncodingException {
        IvParameterSpec ivParameterSpec = new IvParameterSpec(iv.getBytes("utf-8"));
        System.out.println("偏移量:"+byteToHexString(ivParameterSpec.getIV()));
        return ivParameterSpec;
    }

    public static byte[] encrypt(String src, byte[] key) throws NoSuchAlgorithmException, NoSuchPaddingException,
            InvalidKeyException, IllegalBlockSizeException, BadPaddingException, UnsupportedEncodingException, InvalidAlgorithmParameterException {
        SecretKey secretKey = new SecretKeySpec(key, Algorithm);
        //IvParameterSpec ivParameterSpec = getIv();
        Cipher cipher = Cipher.getInstance(AlgorithmProvider);
        cipher.init(Cipher.ENCRYPT_MODE, secretKey);
        byte[] cipherBytes = cipher.doFinal(src.getBytes(Charset.forName("utf-8")));
        return cipherBytes;
    }

    public static byte[] decrypt(String src, byte[] key) throws Exception {
        SecretKey secretKey = new SecretKeySpec(key, Algorithm);

        //IvParameterSpec ivParameterSpec = getIv();
        Cipher cipher = Cipher.getInstance(AlgorithmProvider);
        cipher.init(Cipher.DECRYPT_MODE, secretKey);
        byte[] hexBytes = hexStringToBytes(src);
        byte[] plainBytes = cipher.doFinal(hexBytes);
        return plainBytes;
    }

    /**
     * 将byte转换为16进制字符串
     * @param src
     * @return
     */
    public static String byteToHexString(byte[] src) {
        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < src.length; i++) {
            int v = src[i] & 0xff;
            String hv = Integer.toHexString(v);
            if (hv.length() < 2) {
                sb.append("0");
            }
            sb.append(hv);
        }
        return sb.toString();
    }

    /**
     * 将16进制字符串装换为byte数组
     * @param hexString
     * @return
     */
    public static byte[] hexStringToBytes(String hexString) {
        hexString = hexString.toUpperCase();
        int length = hexString.length() / 2;
        char[] hexChars = hexString.toCharArray();
        byte[] b = new byte[length];
        for (int i = 0; i < length; i++) {
            int pos = i * 2;
            b[i] = (byte) (charToByte(hexChars[pos]) << 4 | charToByte(hexChars[pos + 1]));
        }
        return b;
    }

    private static byte charToByte(char c) {
        return (byte) "0123456789ABCDEF".indexOf(c);
    }

    public static void main(String[] args) {
        try {
            // byte key[] = generatorKey();
            // 密钥必须是16的倍数
            byte key[] = "1234567890ABCDEF1234567890ABCDEf".getBytes("utf-8");//hexStringToBytes("0123456789ABCDEF");
            String src = "werty7890";
            System.out.println("密钥:"+byteToHexString(key));
            System.out.println("原字符串:"+src);

            String enc = byteToHexString(encrypt(src, key));
            System.out.println("加密:"+enc);
            System.out.println("解密:"+new String(decrypt(enc, key), "utf-8"));
        } catch (InvalidKeyException e) {
            e.printStackTrace();
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        } catch (NoSuchPaddingException e) {
            e.printStackTrace();
        } catch (IllegalBlockSizeException e) {
            e.printStackTrace();
        } catch (BadPaddingException e) {
            e.printStackTrace();
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}
这里写图片描述

结果

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