private static final String KEY = "xxxxxx"; // KEY的字节长度必须超过24
public DESUtil(){
super();
}
/** DES加密
* @param str 要加密的内容
*/
public String getDES(String str){
if(TextUtils.isEmpty(str)){
return null;
}
try {
byte[] data = str.getBytes("UTF-8");
byte[] key = KEY.getBytes();
LogUtil.info("json", "length= " + key.length);
return Base64.encodeToString(des3EncodeECB(key,data), Base64.DEFAULT);
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
}
return null;
}
/**
* ECB加密,不要IV
* @param key 密钥
* @param data 明文
* @return Base64编码的密文
* @throws Exception
*/
private byte[] des3EncodeECB(byte[] key, byte[] data)
throws Exception {
Key deskey = null;
DESedeKeySpec spec = new DESedeKeySpec(key);
SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("desede");
deskey = keyfactory.generateSecret(spec);
Cipher cipher = Cipher.getInstance("desede" + "/ECB/PKCS5Padding");
cipher.init(Cipher.ENCRYPT_MODE, deskey);
byte[] bOut = cipher.doFinal(data);
return bOut;
}
/**
* ECB解密,不要IV
* @param key 密钥
* @param data Base64编码的密文
* @return 明文
* @throws Exception
*/
private byte[] ees3DecodeECB(byte[] key, byte[] data)
throws Exception {
Key deskey = null;
DESedeKeySpec spec = new DESedeKeySpec(key);
SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("desede");
deskey = keyfactory.generateSecret(spec);
Cipher cipher = Cipher.getInstance("desede" + "/ECB/PKCS5Padding");
cipher.init(Cipher.DECRYPT_MODE, deskey);
byte[] bOut = cipher.doFinal(data);
return bOut;
}
/**
* CBC加密
* @param key 密钥
* @param keyiv IV
* @param data 明文
* @return Base64编码的密文
* @throws Exception
*/
private byte[] des3EncodeCBC(byte[] key, byte[] keyiv, byte[] data)
throws Exception {
Key deskey = null;
DESedeKeySpec spec = new DESedeKeySpec(key);
SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("desede");
deskey = keyfactory.generateSecret(spec);
Cipher cipher = Cipher.getInstance("desede" + "/CBC/PKCS5Padding");
IvParameterSpec ips = new IvParameterSpec(keyiv);
cipher.init(Cipher.ENCRYPT_MODE, deskey, ips);
byte[] bOut = cipher.doFinal(data);
return bOut;
}
/**
* CBC解密
* @param key 密钥
* @param keyiv IV
* @param data Base64编码的密文
* @return 明文
* @throws Exception
*/
private byte[] des3DecodeCBC(byte[] key, byte[] keyiv, byte[] data)
throws Exception {
Key deskey = null;
DESedeKeySpec spec = new DESedeKeySpec(key);
SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("desede");
deskey = keyfactory.generateSecret(spec);
Cipher cipher = Cipher.getInstance("desede" + "/CBC/PKCS5Padding");
IvParameterSpec ips = new IvParameterSpec(keyiv);
cipher.init(Cipher.DECRYPT_MODE, deskey, ips);
byte[] bOut = cipher.doFinal(data);
return bOut;
}
