php des加解密类封装
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2024-03-14 13:21:04
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php des加解密类封装
<?php
namespace Des;
class JoDES
{
public $key;
public $iv;
function __construct($key) {
$this->key = $key;
$this->iv = '';
}
/**
* DES 解密函数
*
* @param string $ciphertext 密文
* @param string $method 加密方式
* @param string $password **
*/
function decrypt($ciphertext, $method = 'DES-ECB', $options = OPENSSL_ZERO_PADDING) {
$password = $this->key;
$hex = hex2bin($ciphertext);
$data = base64_encode($hex);
$plaintext = openssl_decrypt($data, $method, $password, $options);
return trim($plaintext);
}
/**
* DES 加密函数
*
* @param string $plaintext 明文
* @param string $method 解密方式
* @param string $password **
*/
function encrypt($plaintext, $method = 'DES-ECB', $options = OPENSSL_ZERO_PADDING) {
return strtoupper(bin2hex(mcrypt_encrypt(MCRYPT_DES, $this->key, $plaintext,'ecb', $this->iv)));
$password = $this->key;
//字符串长度要求是8的倍数,不够要空值补足
if ($m = strlen($plaintext) % 8) {
$plaintext .= str_repeat("\x00", 8 - $m);//双字节字符
}
$encResult = openssl_encrypt($plaintext, $method, $password, $options);
$ciphertext = bin2hex(base64_decode($encResult));
return $ciphertext;
}
function pkcs5_unpad($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, 0, -1 * $pad);
}
function strToHex($string) {
$hex = "";
for ($i = 0; $i < strlen($string); $i++)
$hex .= dechex(ord($string[$i]));
$hex = strtoupper($hex);
return $hex;
}
function hexToStr($hex) { //十六进制转字符串
$string = "";
for ($i = 0; $i < strlen($hex) - 1; $i += 2)
$string .= chr(hexdec($hex[$i] . $hex[$i + 1]));
return $string;
}
}
注:mcrypt_encrypt()函数在php5.6版本不再接受解密key后面补\0的做法,如果位数不足8位,会返回false
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