js前端3des加密 后台java解密

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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

js前端3des加密 后台java解密

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原文地址：http://blog.csdn.net/u010081710/article/details/47398315