时间：2021-07-01 10:21:17 帮助过：9人阅读
下面是java的代码片段：
public static String DES_KEY="36位的key";
执行方法：
DesUtil.decrypt(rs.getString(i+1),Global.DES_KEY );
类：
public class DesUtil {
private final static String DES = "DES";
private final static String PADDING="DES/ECB/PKCS5Padding";
private final static Log log= LogFactory.getLog(DesUtil.class);
public static byte[] encrypt(byte[] src, byte[] key)throws Exception {
SecureRandom sr = new SecureRandom();
DESKeySpec dks = new DESKeySpec(key);
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(DES);
SecretKey securekey = keyFactory.generateSecret(dks);
Cipher cipher = Cipher.getInstance(PADDING);
cipher.init(Cipher.ENCRYPT_MODE, securekey, sr);
return cipher.doFinal(src);
}
public static byte[] decrypt(byte[] src, byte[] key)throws Exception {
SecureRandom sr = new SecureRandom();
DESKeySpec dks = new DESKeySpec(key);
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(DES);
SecretKey securekey = keyFactory.generateSecret(dks);
Cipher cipher = Cipher.getInstance(PADDING);
cipher.init(Cipher.DECRYPT_MODE, securekey, sr);
return cipher.doFinal(src);
}
public final static String decrypt(String data,String key){
try {
return new String(decrypt(Base64.decode(data.getBytes()),
key.getBytes()));
}catch(Exception e) {
log.error("Exception -->DesUtil");
e.printStackTrace();
}
return null;
}
public final static String decrypt(String data,String key, String charset){
try {
return new String(decrypt(Base64.decode(data.getBytes()),
key.getBytes()), charset);
}catch(Exception e) {
log.error("Exception -->DesUtil ");
e.printStackTrace();
}
return null;
}
public final static String encrypt(String code,String key){
try {
return Base64.encodeBytes(encrypt(code.getBytes("utf-8"), key.getBytes()));
}catch(Exception e) {
log.error("Exception -->DesUtil");
e.printStackTrace();
}
return null;
}
/*
public static void main(String[] args) {
/**
* Convert byte[] string
*
* @param src
* @return
*/
public static String bytesTo16HexString(byte[] src) {
StringBuilder stringBuilder = new StringBuilder("");
if (src == null || src.length <= 0) {
return "";
}
for (int i = 0; i < src.length; i++) {
int v = src[i] & 0xFF;
String hv = Integer.toHexString(v);
if (hv.length() < 2) {
stringBuilder.append(0);
}
stringBuilder.append(hv);
}
return stringBuilder.toString();
}
}
和java端进行对接的，我用php解密，key是36字节的，所以没有头绪了。我想着是不是有把这36字节转化成16或者32字节的通用方法？先谢谢大家了。
下面是java的代码片段：
public static String DES_KEY="36位的key";
执行方法：
DesUtil.decrypt(rs.getString(i+1),Global.DES_KEY );
类：
public class DesUtil {
private final static String DES = "DES";
private final static String PADDING="DES/ECB/PKCS5Padding";
private final static Log log= LogFactory.getLog(DesUtil.class);
public static byte[] encrypt(byte[] src, byte[] key)throws Exception {
SecureRandom sr = new SecureRandom();
DESKeySpec dks = new DESKeySpec(key);
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(DES);
SecretKey securekey = keyFactory.generateSecret(dks);
Cipher cipher = Cipher.getInstance(PADDING);
cipher.init(Cipher.ENCRYPT_MODE, securekey, sr);
return cipher.doFinal(src);
}
public static byte[] decrypt(byte[] src, byte[] key)throws Exception {
SecureRandom sr = new SecureRandom();
DESKeySpec dks = new DESKeySpec(key);
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(DES);
SecretKey securekey = keyFactory.generateSecret(dks);
Cipher cipher = Cipher.getInstance(PADDING);
cipher.init(Cipher.DECRYPT_MODE, securekey, sr);
return cipher.doFinal(src);
}
public final static String decrypt(String data,String key){
try {
return new String(decrypt(Base64.decode(data.getBytes()),
key.getBytes()));
}catch(Exception e) {
log.error("Exception -->DesUtil");
e.printStackTrace();
}
return null;
}
public final static String decrypt(String data,String key, String charset){
try {
return new String(decrypt(Base64.decode(data.getBytes()),
key.getBytes()), charset);
}catch(Exception e) {
log.error("Exception -->DesUtil ");
e.printStackTrace();
}
return null;
}
public final static String encrypt(String code,String key){
try {
return Base64.encodeBytes(encrypt(code.getBytes("utf-8"), key.getBytes()));
}catch(Exception e) {
log.error("Exception -->DesUtil");
e.printStackTrace();
}
return null;
}
/*
public static void main(String[] args) {
/**
* Convert byte[] string
*
* @param src
* @return
*/
public static String bytesTo16HexString(byte[] src) {
StringBuilder stringBuilder = new StringBuilder("");
if (src == null || src.length <= 0) {
return "";
}
for (int i = 0; i < src.length; i++) {
int v = src[i] & 0xFF;
String hv = Integer.toHexString(v);
if (hv.length() < 2) {
stringBuilder.append(0);
}
stringBuilder.append(hv);
}
return stringBuilder.toString();
}
}
用冗余字符补全到48字节。