Base64.java
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.OutputStream;public class Base64 {
private static final char[] legalChars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"
.toCharArray();/**
* data[]进行编码
*
* @param data
* @return
*/
public static String encode(byte[] data) {
int start = 0;
int len = data.length;
StringBuffer buf = new StringBuffer(data.length * 3 / 2);int end = len - 3;
int i = start;
int n = 0;while (i <= end) {
int d = ((((int) data[i]) & 0x0ff) << 16)
| ((((int) data[i + 1]) & 0x0ff) << 8)
| (((int) data[i + 2]) & 0x0ff);buf.append(legalChars[(d >> 18) & 63]);
buf.append(legalChars[(d >> 12) & 63]);
buf.append(legalChars[(d >> 6) & 63]);
buf.append(legalChars[d & 63]);i += 3;
if (n++ >= 14) {
n = 0;
buf.append(" ");
}
}if (i == start + len - 2) {
int d = ((((int) data[i]) & 0x0ff) << 16)
| ((((int) data[i + 1]) & 255) << 8);buf.append(legalChars[(d >> 18) & 63]);
buf.append(legalChars[(d >> 12) & 63]);
buf.append(legalChars[(d >> 6) & 63]);
buf.append("=");
} else if (i == start + len - 1) {
int d = (((int) data[i]) & 0x0ff) << 16;buf.append(legalChars[(d >> 18) & 63]);
buf.append(legalChars[(d >> 12) & 63]);
buf.append("==");
}return buf.toString();
}private static int decode(char c) {
if (c >= ‘A‘ && c <= ‘Z‘)
return ((int) c) - 65;
else if (c >= ‘a‘ && c <= ‘z‘)
return ((int) c) - 97 + 26;
else if (c >= ‘0‘ && c <= ‘9‘)
return ((int) c) - 48 + 26 + 26;
else
switch (c) {
case ‘+‘:
return 62;
case ‘/‘:
return 63;
case ‘=‘:
return 0;
default:
throw new RuntimeException("unexpected code: " + c);
}
}/**
* Decodes the given Base64 encoded String to a new byte array. The byte
* array holding the decoded data is returned.
*/public static byte[] decode(String s) {
ByteArrayOutputStream bos = new ByteArrayOutputStream();
try {
decode(s, bos);
} catch (IOException e) {
throw new RuntimeException();
}
byte[] decodedBytes = bos.toByteArray();
try {
bos.close();
bos = null;
} catch (IOException ex) {
System.err.println("Error while decoding BASE64: " + ex.toString());
}
return decodedBytes;
}private static void decode(String s, OutputStream os) throws IOException {
int i = 0;int len = s.length();
while (true) {
while (i < len && s.charAt(i) <= ‘ ‘)
i++;if (i == len)
break;int tri = (decode(s.charAt(i)) << 18)
+ (decode(s.charAt(i + 1)) << 12)
+ (decode(s.charAt(i + 2)) << 6)
+ (decode(s.charAt(i + 3)));os.write((tri >> 16) & 255);
if (s.charAt(i + 2) == ‘=‘)
break;
os.write((tri >> 8) & 255);
if (s.charAt(i + 3) == ‘=‘)
break;
os.write(tri & 255);i += 4;
}
}}
DES.java
package cn.crane.game.puzzle.utils.security;
import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;public class DES {
private static byte[] iv = { 1, 2, 3, 4, 5, 6, 7, 8 };/**
* 加密
*
* @param encryptString
* @param encryptKey
* @return
* @throws Exception
*/
public static String encryptDES(String encryptString, String encryptKey) {
// IvParameterSpec zeroIv = new IvParameterSpec(new byte[8]);
try {
IvParameterSpec zeroIv = new IvParameterSpec(iv);
SecretKeySpec key = new SecretKeySpec(encryptKey.getBytes(), "DES");
Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
cipher.init(Cipher.ENCRYPT_MODE, key, zeroIv);
byte[] encryptedData = cipher.doFinal(encryptString.getBytes());return Base64.encode(encryptedData);
} catch (Exception e) {
e.printStackTrace();
}
return "";
}/**
* 解密
*
* @param decryptString
* @param decryptKey
* @return
* @throws Exception
*/
public static String decryptDES(String decryptString, String decryptKey) {
try {
byte[] byteMi = Base64.decode(decryptString);
IvParameterSpec zeroIv = new IvParameterSpec(iv);
// IvParameterSpec zeroIv = new IvParameterSpec(new byte[8]);
SecretKeySpec key = new SecretKeySpec(decryptKey.getBytes(), "DES");
Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");cipher.init(Cipher.DECRYPT_MODE, key, zeroIv);
byte decryptedData[] = cipher.doFinal(byteMi);return new String(decryptedData);
} catch (Exception e) {
e.printStackTrace();
}
return "";}
}