PHP7中使用“DES

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PHP7中使用“DES

1. 条件约束

之前PHP5上常使用的mcrypt库在PHP7.1+上已经被移除，故我们采用openssl对数据进行加解密。

加密方式采用DES-EDE-CBC方式。

密钥填充方式为：采用24位密钥，先将key进行MD5校验取值，得出16位字串，再取key MD5校验值前8位追加到先前的取值后面。由此组装出24位的密钥。

2. 代码分享

<?phpclass DesEdeCbc {private $cipher, $key, $iv;/*** DesEdeCbc constructor.* @param $cipher* @param $key* @param $iv*/
public function __construct($cipher, $key, $iv) {
$this->cipher = $cipher;
$this->key= $this->getFormatKey($key);
$this->iv = $iv;
}/*** @func  加密* @param $msg* @return string*/
public function encrypt($msg) {
$des = @openssl_encrypt($msg, $this->cipher, $this->key, OPENSSL_RAW_DATA, $this->iv);
return base64_encode($des);
}/*** @func  解密* @param $msg* @return string*/
public function decrypt($msg) {
return @openssl_decrypt(base64_decode($msg), $this->cipher, $this->key, OPENSSL_RAW_DATA, $this->iv);}/*** @func  生成24位长度的key* @param $skey* @return bool|string*/
private function getFormatKey($skey) {
$md5Value= md5($skey);
$md5ValueLen = strlen($md5Value);
$key = $md5Value . substr($md5Value, 0, $md5ValueLen / 2);return hex2bin($key);
}}$cipher = 'DES-EDE-CBC';
$msg = 'HelloWorld';
$key = '12345678';
$iv  = "\x00\x00\x00\x00\x00\x00\x00\x00";$des = new DesEdeCbc($cipher, $key, $iv);// 加密
$msg = $des->encrypt($msg);
echo '加密后: ' . $msg . PHP_EOL;// 解密
$src = $des->decrypt($msg);
echo '解密后: ' . $src . PHP_EOL;

3. 一点说明

可以根据实际情况调整加密方式、key的填充方式、及iv向量来满足不同的需求。

支持的算法有：。非对称加密：。RSA：。公钥加密，私钥解密。私钥加密，公钥解密。对称加密：。AES：。AES-128-ECB,AES-128-CBC,AES-128-OFB,AES-128-CFB,AES-128-CTR。AES-192-ECB,AES-192-CBC,AES-192-OFB,AES-192-CFB,AES-192-CTR。AES-256-ECB,AES-256-CBC,AES-256-OFB,AES-256-CFB,AES-256-CTR。DES：。DES-ECB，DES-CBC，DES-OFB，DES-CFB，。3DES:。3DES-ECB，3DES-CBC，3DES-OFB，3DES-CFB，。数据摘要算法：。md5，sha，sha1，sha256，sha512。Hamc算法：。Hamc-md5，Hamc-sha，Hamc-sha1，Hamc-sha256，Hamc-sha512。签名：。RSA签名， 验签。另外还有 PEM文件读取，写出等操作。@落款hMZ。Tags：OPENSSL加密解密。

PHP实现DES、ECB、PKCS5Padding加密兼容Java SHA1PRNG算法

额外：

public static final String ALGORITHM = "DES";
public static final String TRANSFORMATION = "DES/ECB/PKCS5Padding";public static String encrypt(String contents, String password) throws Exception {try{Cipher cipher = Cipher.getInstance(TRANSFORMATION);cipher.init(Cipher.ENCRYPT_MODE, generateKey(password));byte[] output = cipher.doFinal(contents.getBytes("utf-8"));return new String(Base64.encodeBase64(output), "utf-8");}catch (Exception e){logger.error("加密失败:{}",e);}return null;}public static Key generateKey(String password) throws Exception {return generateKey(password.getBytes());}public static Key generateKey(byte[] seed) throws Exception {KeyGenerator keyGenerator = KeyGenerator.getInstance(ALGORITHM);SecureRandom secureRandom = SecureRandom.getInstance("SHA1PRNG");secureRandom.setSeed(seed);keyGenerator.init(56,secureRandom);Key key = keyGenerator.generateKey();return key;}

php加密

$key = "012345";  
$data = "1866666345";
$key = substr(openssl_digest(openssl_digest($key, 'sha1', true), 'sha1', true), 0, 16);
$out = openssl_encrypt($data, 'DES-ECB', $key, OPENSSL_RAW_DATA);
echo base64_encode($out);