DES加密+Base64转换转实现代码

来源：互联网发布：链轮尺寸计算软件编辑：程序博客网时间：2024/05/22 02:27
首先，对用户输入的password进行MD5转换，然后，对用户输入的Data进行des加密，最后进行base64转换为密文；解密，对用户输入的password进行MD5转换，然后，对用户输入的Data进行base64解密，最后进行des解密为明文；现在提供这样一个帮助类，进行类似操作！
package httpVisit.action;  import javax.crypto.Cipher;import javax.crypto.SecretKey;import javax.crypto.SecretKeyFactory;import javax.crypto.spec.DESKeySpec;import javax.crypto.spec.IvParameterSpec;  import sun.misc.BASE64Decoder;import sun.misc.BASE64Encoder;  /** * @author：Heweipo * @version 1.00 * */public class DesCoderUtil {      private static byte[] keys = { 1, -1, 1, -1, 1, -1, 1, -1 };      private static String key = "leagsoft";      public static String getKey() {        return key;    }      public static void setKey(String key) {        DesCoderUtil.key = key;    }      /**     *     * <p>     * 对password进行MD5加密     * @param source     * @return     * @return byte[]        * author: Heweipo     */    public static byte[] getMD5(byte[] source) {        byte tmp[] = null;        try {            java.security.MessageDigest md = java.security.MessageDigest                    .getInstance("MD5");            md.update(source);            tmp = md.digest();        } catch (Exception e) {            e.printStackTrace();        }        return tmp;    }      /**     *     * <p>     * 采用JDK内置类进行真正的加密操作     * @param byteS     * @param password     * @return     * @return byte[]        * author: Heweipo     */    private static byte[] encryptByte(byte[] byteS, byte password[]) {        byte[] byteFina = null;        try {// 初始化加密/解密工具            Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");            DESKeySpec desKeySpec = new DESKeySpec(password);            SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");            SecretKey secretKey = keyFactory.generateSecret(desKeySpec);            IvParameterSpec iv = new IvParameterSpec(keys);            cipher.init(Cipher.ENCRYPT_MODE, secretKey, iv);            byteFina = cipher.doFinal(byteS);        } catch (Exception e) {            throw new RuntimeException(e);        }        return byteFina;    }      /**     *     * <p>     * 采用JDK对应的内置类进行解密操作     * @param byteS     * @param password     * @return     * @return byte[]        * author: Heweipo     */    private static byte[] decryptByte(byte[] byteS, byte password[]) {        byte[] byteFina = null;        try {// 初始化加密/解密工具            Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");            DESKeySpec desKeySpec = new DESKeySpec(password);            SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");            SecretKey secretKey = keyFactory.generateSecret(desKeySpec);            IvParameterSpec iv = new IvParameterSpec(keys);            cipher.init(Cipher.DECRYPT_MODE, secretKey, iv);            byteFina = cipher.doFinal(byteS);        } catch (Exception e) {            throw new RuntimeException(e);        }        return byteFina;    }      /**     *     * <p>     * Des加密strMing，然后base64转换     * @param strMing     * @param md5key     * @return     * @return String        * author: Heweipo     */    public static String encryptStr(String strMing, byte md5key[]) {        byte[] byteMi = null;        byte[] byteMing = null;        String strMi = "";        try {            byteMing = strMing.getBytes("utf-8");            byteMi = encryptByte(byteMing, md5key);            BASE64Encoder base64Encoder = new BASE64Encoder();            strMi = base64Encoder.encode(byteMi);        } catch (Exception e) {            throw new RuntimeException(e);        } finally {            byteMing = null;            byteMi = null;        }        return strMi;    }      /**     *     * <p>     * Base64转换strMi,然后进行des解密     * @param strMi     * @param md5key     * @return     * @return String        * author: Heweipo     */    public static String decryptStr(String strMi, byte md5key[]) {        byte[] byteMing = null;        String strMing = "";        try {            BASE64Decoder decoder = new BASE64Decoder();            byteMing = decoder.decodeBuffer(strMi);            byteMing = decryptByte(byteMing, md5key);            strMing = new String(byteMing);        } catch (Exception e) {            throw new RuntimeException(e);        } finally {            byteMing = null;        }        return strMing;    }          public static void main(String[] args) {                  String[] keys = {"leagsoft","leagsoftpo","leagsoftiu","leagsoftyy","leagsoftew","leagsoftmm"};        for(String key : keys){            String data = "我是learn_more，who are you?";            try{                System.out.println(DesCoderUtil.encryptStr(data, DesCoderUtil.getMD5(key.getBytes("utf-8"))));                System.out.println("--------------");                System.out.println(DesCoderUtil.decryptStr(DesCoderUtil.encryptStr(data, DesCoderUtil.getMD5(key.getBytes("utf-8"))),                        DesCoderUtil.getMD5(key.getBytes("utf-8"))));            }catch(Exception e){                e.printStackTrace();            }        }    }  }
转自【http://my.oschina.net/u/1989321/blog/335210】
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