字符数据如何用DES加密 des数据加密算法

文章摘要：字符数据如何用DES加密 des数据加密算法

在Java中使用DES加密算法对字符数据进行加密，具体方法如下： public class DesTool { […]

在Java中使用DES加密算法对字符数据进行加密，具体方法如下：

public class DesTool {

private static final String PASSKEY = "afasdf";

private static final String DESKEY = "asfsdfsdf";

public static String encoderOrdecoder( String src, int mode) {

String tag="";

InputStream is = null;

OutputStream out = null;

CipherInputStream cis = null;

try {

SecureRandom sr = new SecureRandom();

DESKeySpec dks = new DESKeySpec(DESKEY.getBytes());

SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");

SecretKey securekey = keyFactory.generateSecret(dks);

IvParameterSpec iv = new IvParameterSpec(PASSKEY.getBytes());

Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");

cipher.init(mode, securekey, iv, sr);

cis = new CipherInputStream(new ByteArrayInputStream(src.getBytes()) , cipher);

out=new ByteArrayOutputStream();

byte[] buffer = new byte[1024];

int r;

while ((r = cis.read(buffer)) > 0) {

out.write(buffer, 0, r);

}

tag=out.toString();

} catch (Exception e) {

e.printStackTrace();

} finally {

try {

if (is != null) {

is.close();

}

if (cis != null) {

cis.close();

}

if (out != null) {

out.close();

}

} catch (Exception e1){

}

}

return tag;

}

public static void main(String[] args) {

System.out.println("aaa");

String t=encoderOrdecoder("aaa", Cipher.ENCRYPT_MODE );

System.out.println(t);

System.out.println(encoderOrdecoder(t, Cipher.DECRYPT_MODE ));

}

}