DES加密+Base64转换-白红宇

DES加密+Base64转换

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发布时间：2019-06-22

本文共 4900 字，大约阅读时间需要 16 分钟。

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;    }     /**     *      *      * 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;    }     /**     *      * 
     * 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;    }     /**     *      * 
     * 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;    }     /**     *      * 
     * 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;    }     /**     *      * 
     * 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();            }        }    } }