js前端3des加密 后台java解密

import java.security.Key;
import java.security.SecureRandom;
import javax.crypto.Cipher;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESedeKeySpec;
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;

/**
 * des加密解密
 *
 * @author
 *
 */
public class DesEncrypt {  

    Key key;  

    public DesEncrypt(String str) {
        setKey(str);// 生成密匙
    }  

    public DesEncrypt() {
        setKey("abc123.*abc123.*abc123.*abc123.*");
    }  

    /**
     * 根据参数生成KEY
     */
    public void setKey(String strKey) {
        try {
        	//对比DES
            SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DESede");
            this.key  = keyFactory.generateSecret(new DESedeKeySpec(strKey.getBytes("UTF8")));
        } catch (Exception e) {
            throw new RuntimeException(
                    "Error initializing SqlMap class. Cause: " + e);
        }
    }  

    /**
     * 加密String明文输入,String密文输出
     */
    public String encrypt(String strMing) {
        byte[] byteMi = null;
        byte[] byteMing = null;
        String strMi = "";
        BASE64Encoder base64en = new BASE64Encoder();
        try {
            byteMing = strMing.getBytes("UTF8");
            byteMi = this.getEncCode(byteMing);
            strMi = base64en.encode(byteMi);
        } catch (Exception e) {
            throw new RuntimeException(
                    "Error initializing SqlMap class. Cause: " + e);
        } finally {
            base64en = null;
            byteMing = null;
            byteMi = null;
        }
        return strMi;
    }  

    /**
     * 解密 以String密文输入,String明文输出
     *
     * @param strMi
     * @return
     */
    public String decrypt(String strMi) {
        BASE64Decoder base64De = new BASE64Decoder();
        byte[] byteMing = null;
        byte[] byteMi = null;
        String strMing = "";
        try {
            byteMi = base64De.decodeBuffer(strMi);
            byteMing = this.getDesCode(byteMi);
            strMing = new String(byteMing, "UTF8");
        } catch (Exception e) {
            throw new RuntimeException(
                    "Error initializing SqlMap class. Cause: " + e);
        } finally {
            base64De = null;
            byteMing = null;
            byteMi = null;
        }
        return strMing;
    }  

    /**
     * 加密以byte[]明文输入,byte[]密文输出
     *
     * @param byteS
     * @return
     */
    private byte[] getEncCode(byte[] byteS) {
        byte[] byteFina = null;
        Cipher cipher;
        try {//对比DES
            cipher = Cipher.getInstance("DESede");
            cipher.init(Cipher.ENCRYPT_MODE, key,SecureRandom.getInstance("SHA1PRNG"));
            byteFina = cipher.doFinal(byteS);
        } catch (Exception e) {
            throw new RuntimeException(
                    "Error initializing SqlMap class. Cause: " + e);
        } finally {
            cipher = null;
        }
        return byteFina;
    }  

    /**
     * 解密以byte[]密文输入,以byte[]明文输出
     *
     * @param byteD
     * @return
     */
    private byte[] getDesCode(byte[] byteD) {
        Cipher cipher;
        byte[] byteFina = null;
        try {//对比DES
            cipher = Cipher.getInstance("DESede");
            cipher.init(Cipher.DECRYPT_MODE, key,SecureRandom.getInstance("SHA1PRNG"));
            byteFina = cipher.doFinal(byteD);
        } catch (Exception e) {
            throw new RuntimeException(
                    "Error initializing SqlMap class. Cause: " + e);
        } finally {
            cipher = null;
        }
        return byteFina;
    }  

    public static void main(String args[])  {
        DesEncrypt des = new DesEncrypt();  

        String str1 = "asssAAASSS.*/中";
        // DES加密
        String str2 = des.encrypt(str1);
        DesEncrypt des1 = new DesEncrypt();
        String deStr = des1.decrypt(str2);
        System.out.println("密文:" + str2);
        // DES解密
        System.out.println("明文:" + deStr);

    }  

}

DES的密钥长度为8位，3DES密钥长度为32位。

3DES密钥材料密钥工厂，加密算法不同。

前端js加密

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