javades加密解密包_DES加密解密Java中运用

packagecom.blog.d201706.encrypt;importjavax.crypto.Cipher;importjavax.crypto.SecretKey;importjavax.crypto.SecretKeyFactory;importjavax.crypto.spec.DESKeySpec;importjavax.crypto.spec.IvParameterSpec;public classDes {/*** 加密

*&＃64;paramdata

*&＃64;paramsKey

*&＃64;return

*/

public static byte[] encrypt(byte[] data, String sKey) {try{byte[] key &＃61;sKey.getBytes();//初始化向量

IvParameterSpec iv &＃61; newIvParameterSpec(key);

DESKeySpec desKey&＃61; newDESKeySpec(key);//创建一个密匙工厂&＃xff0c;然后用它把DESKeySpec转换成securekey

SecretKeyFactory keyFactory &＃61; SecretKeyFactory.getInstance("DES");

SecretKey securekey&＃61;keyFactory.generateSecret(desKey);//Cipher对象实际完成加密操作

Cipher cipher &＃61; Cipher.getInstance("DES/CBC/PKCS5Padding");//用密匙初始化Cipher对象

cipher.init(Cipher.ENCRYPT_MODE, securekey, iv);//现在&＃xff0c;获取数据并加密//正式执行加密操作

returncipher.doFinal(data);

}catch(Throwable e) {

e.printStackTrace();

}return null;

}/*** 解密

*&＃64;paramsrc

*&＃64;paramsKey

*&＃64;return*&＃64;throwsException*/

public static byte[] decrypt(byte[] src, String sKey) throwsException {byte[] key &＃61;sKey.getBytes();//初始化向量

IvParameterSpec iv &＃61; newIvParameterSpec(key);//创建一个DESKeySpec对象

DESKeySpec desKey &＃61; newDESKeySpec(key);//创建一个密匙工厂

SecretKeyFactory keyFactory &＃61; SecretKeyFactory.getInstance("DES");//将DESKeySpec对象转换成SecretKey对象

SecretKey securekey &＃61;keyFactory.generateSecret(desKey);//Cipher对象实际完成解密操作

Cipher cipher &＃61; Cipher.getInstance("DES/CBC/PKCS5Padding");//用密匙初始化Cipher对象

cipher.init(Cipher.DECRYPT_MODE, securekey, iv);//真正开始解密操作

returncipher.doFinal(src);

}/*** 将二进制转换成16进制

*

*&＃64;parambuf

*&＃64;return

*/

public static String parseByte2HexStr(bytebuf[]) {

StringBuffer sb&＃61; newStringBuffer();for (int i &＃61; 0; i

String hex&＃61; Integer.toHexString(buf[i] & 0xFF);if (hex.length() &＃61;&＃61; 1) {

hex&＃61; &＃39;0&＃39; &＃43;hex;

}

sb.append(hex.toUpperCase());

}returnsb.toString();

}/*** 将16进制转换为二进制

*

*&＃64;paramhexStr

*&＃64;return

*/

public static byte[] parseHexStr2Byte(String hexStr) {if (hexStr.length() <1) return null;byte[] result &＃61; new byte[hexStr.length() / 2];for (int i &＃61; 0; i

result[i]&＃61; (byte) (high * 16 &＃43;low);

}returnresult;

}

}