添加DES算法验证

common/src/main/java/com/huaxu/util/DESUtil.java

@@ -0,0 +1,105 @@
+package com.huaxu.util;
+
+
+import javax.crypto.Cipher;
+import javax.crypto.SecretKey;
+import javax.crypto.SecretKeyFactory;
+import javax.crypto.spec.DESKeySpec;
+import javax.crypto.spec.IvParameterSpec;
+
+import org.apache.commons.codec.binary.Base64;
+
+import java.util.Date;
+
+
+public class DESUtil {
+
+    /** 允许最大的时间差 */
+    private static final int MAX_TIME = 5;
+
+    public final static String DES_KEY_STRING = "ABSujsuu" ;
+
+    public static String encrypt(String message, String key) throws Exception {
+        Cipher cipher = Cipher.getInstance( "DES/CBC/PKCS5Padding" );
+
+        DESKeySpec desKeySpec = new DESKeySpec(key.getBytes( "UTF-8" ));
+
+        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance( "DES" );
+        SecretKey secretKey = keyFactory.generateSecret(desKeySpec);
+        IvParameterSpec iv = new IvParameterSpec(key.getBytes( "UTF-8" ));
+        cipher.init(Cipher.ENCRYPT_MODE, secretKey, iv);
+
+        return encodeBase64(cipher.doFinal(message.getBytes( "UTF-8" )));
+    }
+
+    public static String decrypt(String message, String key) throws Exception {
+
+        byte [] bytesrc = decodeBase64(message); //convertHexString(message);
+        Cipher cipher = Cipher.getInstance( "DES/CBC/PKCS5Padding" );
+        DESKeySpec desKeySpec = new DESKeySpec(key.getBytes( "UTF-8" ));
+        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance( "DES" );
+        SecretKey secretKey = keyFactory.generateSecret(desKeySpec);
+        IvParameterSpec iv = new IvParameterSpec(key.getBytes( "UTF-8" ));
+
+        cipher.init(Cipher.DECRYPT_MODE, secretKey, iv);
+
+        byte [] retByte = cipher.doFinal(bytesrc);
+        return new String(retByte);
+    }
+
+    public static byte [] convertHexString(String ss) {
+        byte digest[] = new byte [ss.length() / 2 ];
+        for ( int i = 0 ; i < digest.length; i++) {
+            String byteString = ss.substring( 2 * i, 2 * i + 2 );
+            int byteValue = Integer.parseInt(byteString, 16 );
+            digest[i] = ( byte ) byteValue;
+        }
+
+        return digest;
+    }
+
+    public static String toHexString( byte b[]) {
+        StringBuffer hexString = new StringBuffer();
+        for ( int i = 0 ; i < b.length; i++) {
+            String plainText = Integer.toHexString( 0xff & b[i]);
+            if (plainText.length() < 2 )
+                plainText = "0" + plainText;
+            hexString.append(plainText);
+        }
+
+        return hexString.toString();
+    }
+
+    /**
+     * 数据验证:
+     * 传过来的时间跟当前的时间进行比较
+     * @param  date 加密的时间
+     */
+    public static boolean verifyTime(Long date) {
+        try {
+            // 获取当前时间
+            long differ   = Long.parseLong(DatesUtil.formatDate(new Date(), "yyyyMMddHHmm")) - date;
+            return !(differ > MAX_TIME || differ < 0);
+        } catch (Exception e) {
+            return false;
+        }
+    }
+
+
+    public static String encodeBase64( byte [] b) {
+        return Base64.encodeBase64String(b);
+    }
+
+    public static byte [] decodeBase64(String base64String) {
+        return Base64.decodeBase64(base64String);
+    }
+
+    public static void main(String[] args) {
+        String  pa = "12345678";
+        try {
+            System.out.println(decrypt("tCCAYj5jbjmEGiFogOsP9kRrdZvLrLf/HgaJQhR7T82xLkZ2U4nk4vc0ZN2i8WQxHZ/kh9YUjVI=", pa));
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
+}