3-DES加密解密

/** * @author Collus * */import java.io.IOException;import java.io.UnsupportedEncodingException;import java.net.URLDecoder;import java.net.URLEncoder;import java.security.MessageDigest;import java.security.NoSuchAlgorithmException;import java.text.SimpleDateFormat;import java.util.Calendar;import javax.crypto.Cipher;import javax.crypto.SecretKey;import javax.crypto.SecretKeyFactory;import javax.crypto.spec.DESedeKeySpec;import sun.misc.BASE64Decoder;import sun.misc.BASE64Encoder;/** * <p> * Title:加密解密测试 * </p> * * <p> * Description: 加密解密 */public class Endecrypt {/** * 进行MD5加密 * * @param String * 原始的SPKEY * @return byte[] 指定加密方式为md5后的byte[] */private byte[] md5(String strSrc) {byte[] returnByte = null;try {MessageDigest md5 = MessageDigest.getInstance("MD5");returnByte = md5.digest(strSrc.getBytes("GBK"));} catch (Exception e) {e.printStackTrace();}return returnByte;}/** * 得到3-DES的密钥匙 根据接口规范，密钥匙为24个字节，md5加密出来的是16个字节，因此后面补8个字节的0 * * @param String * 原始的SPKEY * @return byte[] 指定加密方式为md5后的byte[] */private byte[] getEnKey(String spKey) {byte[] desKey = null;try {byte[] desKey1 = md5(spKey);desKey = new byte[24];int i = 0;while (i < desKey1.length && i < 24) {desKey[i] = desKey1[i];i++;}if (i < 24) {desKey[i] = 0;i++;}} catch (Exception e) {e.printStackTrace();}return desKey;}/** * 3-DES加密 * * @param byte[] src 要进行3-DES加密的byte[] * @param byte[] enKey 3-DES加密密钥 * @return byte[] 3-DES加密后的byte[] */public byte[] Encrypt(byte[] src, byte[] enKey) {byte[] encryptedData = null;try {DESedeKeySpec dks = new DESedeKeySpec(enKey);SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DESede");SecretKey key = keyFactory.generateSecret(dks);Cipher cipher = Cipher.getInstance("DESede");cipher.init(Cipher.ENCRYPT_MODE, key);encryptedData = cipher.doFinal(src);} catch (Exception e) {e.printStackTrace();}return encryptedData;}/** * 对字符串进行Base64编码 * * @param byte[] src 要进行编码的字符 * * @return String 进行编码后的字符串 */public String getBase64Encode(byte[] src) {String requestValue = "";try {BASE64Encoder base64en = new BASE64Encoder();requestValue = base64en.encode(src);// System.out.println(requestValue);} catch (Exception e) {e.printStackTrace();}return requestValue;}/** * 去掉字符串的换行符号 base64编码3-DES的数据时，得到的字符串有换行符号 ，一定要去掉，否则uni-wise平台解析票根不会成功， * 提示“sp验证失败”。在开发的过程中，因为这个问题让我束手无策， 一个朋友告诉我可以问联通要一段加密后 的文字，然后去和自己生成的字符串比较， * 这是个不错的调试方法。我最后比较发现我生成的字符串唯一不同的 是多了换行。 我用c#语言也写了票根请求程序，没有发现这个问题。 * */private String filter(String str) {String output = null;StringBuffer sb = new StringBuffer();for (int i = 0; i < str.length(); i++) {int asc = str.charAt(i);if (asc != 10 && asc != 13)sb.append(str.subSequence(i, i + 1));}output = new String(sb);return output;}/** * 对字符串进行URLDecoder.encode(strEncoding)编码 * * @param String * src 要进行编码的字符串 * * @return String 进行编码后的字符串 */public String getURLEncode(String src) {String requestValue = "";try {requestValue = URLEncoder.encode(src);} catch (Exception e) {e.printStackTrace();}return requestValue;}/** * 3-DES加密 * * @param String * src 要进行3-DES加密的String * @param String * spkey分配的SPKEY * @return String 3-DES加密后的String */public String get3DESEncrypt(String src, String spkey) {String requestValue = "";try {// 得到3-DES的密钥匙byte[] enKey = getEnKey(spkey);// 要进行3-DES加密的内容在进行/"UTF-16LE/"取字节byte[] src2 = src.getBytes("UTF-16LE");// 进行3-DES加密后的内容的字节byte[] encryptedData = Encrypt(src2, enKey);// 进行3-DES加密后的内容进行BASE64编码String base64String = getBase64Encode(encryptedData);// BASE64编码去除换行符后String base64Encrypt = filter(base64String);// 对BASE64编码中的HTML控制码进行转义的过程requestValue = getURLEncode(base64Encrypt);// System.out.println(requestValue);} catch (Exception e) {e.printStackTrace();}return requestValue;}/** * 对字符串进行URLDecoder.decode(strEncoding)解码 * * @param String * src 要进行解码的字符串 * * @return String 进行解码后的字符串 */public String getURLDecoderdecode(String src) {String requestValue = "";try {requestValue = URLDecoder.decode(src);} catch (Exception e) {e.printStackTrace();}return requestValue;}/** * *进行3-DES解密（密钥匙等同于加密的密钥匙）。 * * @param byte[] src 要进行3-DES解密byte[] * @param String * spkey分配的SPKEY * @return String 3-DES解密后的String */public String deCrypt(byte[] debase64, String spKey) {String strDe = null;Cipher cipher = null;try {cipher = Cipher.getInstance("DESede");byte[] key = getEnKey(spKey);DESedeKeySpec dks = new DESedeKeySpec(key);SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DESede");SecretKey sKey = keyFactory.generateSecret(dks);cipher.init(Cipher.DECRYPT_MODE, sKey);byte ciphertext[] = cipher.doFinal(debase64);strDe = new String(ciphertext, "UTF-16LE");} catch (Exception ex) {strDe = "";ex.printStackTrace();}return strDe;}/** * 3-DES解密 * * @param String * src 要进行3-DES解密的String * @param String * spkey分配的SPKEY * @return String 3-DES加密后的String */public String get3DESDecrypt(String src, String spkey) {String requestValue = "";try {// 得到3-DES的密钥匙// URLDecoder.decodeTML控制码进行转义的过程String URLValue = getURLDecoderdecode(src);// 进行3-DES加密后的内容进行BASE64编码BASE64Decoder base64Decode = new BASE64Decoder();byte[] base64DValue = base64Decode.decodeBuffer(URLValue);// 要进行3-DES加密的内容在进行/"UTF-16LE/"取字节requestValue = deCrypt(base64DValue, spkey);} catch (Exception e) {e.printStackTrace();}return requestValue;}public static void main(String[] args) {Endecrypt test = new Endecrypt();String oldString = "你好，世界杯！";String SPKEY = "1234";System.out.println("1。分配的SPKEY为: " + SPKEY);System.out.println("2。的内容为: " + oldString);String reValue = test.get3DESEncrypt(oldString, SPKEY);reValue = reValue.trim().intern();System.out.println("进行3-DES加密后的内容: " + reValue);String reValue2 = test.get3DESDecrypt(reValue, SPKEY);System.out.println("进行3-DES解密后的内容: " + reValue2);}}