/**
* 3DES加解密类
* @Author: 黎志斌
* @version: v1.0
* 2016年7月21日
*/
class Encrypt
{
//加密秘钥，
private $_key
private $_iv
public function __construct($key, $iv)
{
$this->_key = $key
$this->_iv = $iv
}
/**
* 对字符串进行3DES加密
* @param string 要加密的字符串
* @return mixed 加密成功返回加密后的字符串，否则返回false
*/
public function encrypt3DES($str)
{
$td = mcrypt_module_open(MCRYPT_3DES, "", MCRYPT_MODE_CBC, "")
if ($td === false) {
return false
}
$key = $this->fixLen($this->_key, mcrypt_enc_get_key_size($td))
$iv = $this->fixLen($this->_iv, mcrypt_enc_get_iv_size($td))
//加密数据长度处理
$str = $this->strPad($str, mcrypt_enc_get_block_size($td))
if (mcrypt_generic_init($td, $key, $iv) !== 0) {
return false
}
$result = mcrypt_generic($td, $str)
mcrypt_generic_deinit($td)
mcrypt_module_close($td)
return $result
}
/**
* 对加密的字符串进行3DES解密
* @param string 要解密的字符串
* @return mixed 加密成功返回加密后的字符串，否则返回false
*/
public function decrypt3DES($str)
{
$td = mcrypt_module_open(MCRYPT_3DES, "", MCRYPT_MODE_CBC, "")
if ($td === false) {
return false
}
//检查加密key，iv的长度是否符合算法要求
$key = $this->fixLen($this->_key, mcrypt_enc_get_key_size($td))
$iv = $this->fixLen($this->_iv, mcrypt_enc_get_iv_size($td))
if (mcrypt_generic_init($td, $key, $iv) !== 0) {
return false
}
$result = mdecrypt_generic($td, $str)
mcrypt_generic_deinit($td)
mcrypt_module_close($td)
return $this->strUnPad($result)
}
/**
* 返回适合算法长度的key，iv字符串
* @param string $str key或iv的值
* @param int $td_len 符合条件的key或iv长度
* @return string 返回处理后的key或iv值
*/
private function fixLen($str, $td_len)
{
$str_len = strlen($str)
if ($str_len >$td_len) {
return substr($str, 0, $td_len)
} else if($str_len <$td_len) {
return str_pad($str, $td_len, '0')
}
return $str
}
/**
* 返回适合算法的分组大小的字符串长度，末尾使用\0补齐
* @param string $str 要加密的字符串
* @param int $td_group_len 符合算法的分组长度
* @return string 返回处理后字符串
*/
private function strPad($str, $td_group_len)
{
$padding_len = $td_group_len - (strlen($str) % $td_group_len)
return str_pad($str, strlen($str) + $padding_len, "\0")
}
/**
* 返回适合算法的分组大小的字符串长度，末尾使用\0补齐
* @param string $str 要加密的字符串
* @return string 返回处理后字符串
*/
private function strUnPad($str)
{
return rtrim($str)
}
}
$key = 'ABCEDFGHIJKLMNOPQ'
$iv= '0123456789'
$des = new Encrypt($key, $iv)
$str = "abcdefghijklmnopq"
echo "source: {$str},len: ",strlen($str),"\r\n"
$e_str = $des->encrypt3DES($str)
echo "entrypt: ", $e_str, "\r\n"
$d_str = $des->decrypt3DES($e_str)
echo "dntrypt: {$d_str},len: ",strlen($d_str),"\r\n"
有专门方法的，可以参考：import java.security.MessageDigest
import java.util.Arrays
import javax.crypto.Cipher
import javax.crypto.SecretKey
import javax.crypto.spec.IvParameterSpec
import javax.crypto.spec.SecretKeySpec
public class TripleDESTest {
public static void main(String[] args) throws Exception {
String text = "kyle boon"
byte[] codedtext = new TripleDESTest().encrypt(text)
String decodedtext = new TripleDESTest().decrypt(codedtext)
System.out.println(codedtext)// this is a byte array, you'll just see a reference to an array
System.out.println(decodedtext)// This correctly shows "kyle boon"
}
public byte[] encrypt(String message) throws Exception {
final MessageDigest md = MessageDigest.getInstance("md5")
final byte[] digestOfPassword = md.digest("HG58YZ3CR9"
.getBytes("utf-8"))
final byte[] keyBytes = Arrays.copyOf(digestOfPassword, 24)
for (int j = 0, k = 16j <8) {
keyBytes[k++] = keyBytes[j++]
}
final SecretKey key = new SecretKeySpec(keyBytes, "DESede")
final IvParameterSpec iv = new IvParameterSpec(new byte[8])
final Cipher cipher = Cipher.getInstance("DESede/CBC/PKCS5Padding")
cipher.init(Cipher.ENCRYPT_MODE, key, iv)
final byte[] plainTextBytes = message.getBytes("utf-8")
final byte[] cipherText = cipher.doFinal(plainTextBytes)
// final String encodedCipherText = new sun.misc.BASE64Encoder()
// .encode(cipherText)
return cipherText
}
public String decrypt(byte[] message) throws Exception {
final MessageDigest md = MessageDigest.getInstance("md5")
final byte[] digestOfPassword = md.digest("HG58YZ3CR9"
.getBytes("utf-8"))
final byte[] keyBytes = Arrays.copyOf(digestOfPassword, 24)
for (int j = 0, k = 16j <8) {
keyBytes[k++] = keyBytes[j++]
}
final SecretKey key = new SecretKeySpec(keyBytes, "DESede")
final IvParameterSpec iv = new IvParameterSpec(new byte[8])
final Cipher decipher = Cipher.getInstance("DESede/CBC/PKCS5Padding")
decipher.init(Cipher.DECRYPT_MODE, key, iv)
// final byte[] encData = new
// sun.misc.BASE64Decoder().decodeBuffer(message)
final byte[] plainText = decipher.doFinal(message)
return new String(plainText, "UTF-8")
}
}
