function DES($key,$iv=0)
{
$this->key = $key;
if($iv == 0)
{
$this->iv = $key;
}
else
{
$this->iv = $iv;
}
}
//加密
function encrypt($str)
{
$size = mcrypt_get_block_size ( MCRYPT_DES,MCRYPT_MODE_CBC );
$str = $this->pkcs5Pad ( $str,$size );
$data=mcrypt_cbc(MCRYPT_DES,$this->key,$str,MCRYPT_ENCRYPT,$this->iv);
//$data=strtoupper(bin2hex($data)); //返回大写十六进制字符串
return base64_encode($data);
}
//解密
function decrypt($str)
{
$str = base64_decode ($str);
//$strBin = $this->hex2bin( strtolower($str));
$str = mcrypt_cbc(MCRYPT_DES,MCRYPT_DECRYPT,$this->iv );
$str = $this->pkcs5Unpad( $str );
return $str;
}
function hex2bin($hexData)
{
$binData = "";
for($i = 0; $i < strlen ( $hexData ); $i += 2)
{
$binData .= chr(hexdec(substr($hexData,$i,2)));
}
return $binData;
}
function pkcs5Pad($text,$blocksize)
{
$pad = $blocksize - (strlen ( $text ) % $blocksize);
return $text . str_repeat ( chr ( $pad ),$pad );
}
function pkcs5Unpad($text)
{
$pad = ord ( $text {strlen ( $text ) - 1} );
if ($pad > strlen ( $text ))
return false;
if (strspn ( $text,chr ( $pad ),strlen ( $text ) - $pad ) != $pad)
return false;
return substr ( $text,- 1 * $pad );
}
}
$str = 'abcd';
$key= 'asdfwef5';
$crypt = new DES($key);
$mstr = $crypt->encrypt($str);
$str = $crypt->decrypt($mstr);
echo $str.' <=> '.$mstr;
?>
java代码:
import java.security.Key;
import java.security.SecureRandom;
import java.security.spec.AlgorithmParameterSpec;
import javax.crypto.Cipher;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;
import javax.crypto.spec.IvParameterSpec;
public class Main
{
public static final String ALGORITHM_DES = "DES/CBC/PKCS5Padding";
/**
-
DES算法，加密
-
@param data 待加密字符串
-
@param key 加密私钥，长度不能够小于8位
-
@return 加密后的字节数组，一般结合Base64编码使用
-
@throws CryptException 异常
*/
public static String encode(String key,String data) throws Exception
{
return encode(key,data.getBytes());
}
/** -
DES算法，加密
-
@param data 待加密字符串
-
@param key 加密私钥，长度不能够小于8位
-
@return 加密后的字节数组，一般结合Base64编码使用
-
@throws CryptException 异常
*/
public static String encode(String key,byte[] data) throws Exception
{
try
{
DESKeySpec dks = new DESKeySpec(key.getBytes());SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");//key的长度不能够小于8位字节
Key secretKey = keyFactory.generateSecret(dks);
Cipher cipher = Cipher.getInstance(ALGORITHM_DES);
IvParameterSpec iv = new IvParameterSpec(key.getBytes());
AlgorithmParameterSpec paramSpec = iv;
cipher.init(Cipher.ENCRYPT_MODE,secretKey,paramSpec);
byte[] bytes = cipher.doFinal(data);
// return byte2hex(bytes);
return new String(Base64.encode(bytes));
} catch (Exception e)
{
throw new Exception(e);
}
}
/**
- DES算法，解密
- @param data 待解密字符串
- @param key 解密私钥，长度不能够小于8位
- @return 解密后的字节数组
- @throws Exception 异常
*/
public static byte[] decode(String key,byte[] data) throws Exception
{
try
{
SecureRandom sr = new SecureRandom();
DESKeySpec dks = new DESKeySpec(key.getBytes());
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
//key的长度不能够小于8位字节
Key secretKey = keyFactory.generateSecret(dks);
Cipher cipher = Cipher.getInstance(ALGORITHM_DES);
IvParameterSpec iv = new IvParameterSpec(key.getBytes());
AlgorithmParameterSpec paramSpec = iv;
cipher.init(Cipher.DECRYPT_MODE,paramSpec);
return cipher.doFinal(data);
} catch (Exception e)
{
throw new Exception(e);
}
}
/**
-
获取编码后的值
-
@param key
-
@param data
-
@return
-
@throws Exception
*/
public static String decodeValue(String key,String data)
{
byte[] datas;
String value = null;
try {datas = decode(key,Base64.decode(data.getBytes())); value = new String(datas); } catch (Exception e) { value = ""; }return value;
}
public static void main(String[] args) throws Exception
{
System.out.println("明：abcd ；密：" + Main.encode("asdfwef5","abcd"));
}
}
PS：关于加密技术，本站还提供了如下加密工具供大家参考使用：