1、简单的字符串加密、解密函数
/**
* 字符串加密、解密函数
*
*
* @param string $txt 字符串
* @param string $operation ENCODE为加密，DECODE为解密，可选参数，默认为ENCODE，
* @param string $key 密钥：数字、字母、下划线
* @param string $expiry 过期时间
* @return string
*/
function sys_auth($string, $operation = 'ENCODE', $key = '', $expiry = 0) {
$ckey_length = 4;
$key = md5($key != '' ? $key : pc_base::load_config('system', 'auth_key'));
$keya = md5(substr($key, 0, 16));
$keyb = md5(substr($key, 16, 16));
$keyc = $ckey_length ? ($operation == 'DECODE' ? substr($string, 0, $ckey_length): substr(md5(microtime()), -$ckey_length)) : '';
$cryptkey = $keya.md5($keya.$keyc);
$key_length = strlen($cryptkey);
$string = $operation == 'DECODE' ? base64_decode(strtr(substr($string, $ckey_length), '-_', '+/')) : sprintf('%010d', $expiry ? $expiry + time() : 0).substr(md5($string.$keyb), 0, 16).$string;
$string_length = strlen($string);
$result = '';
$box = range(0, 255);
$rndkey = array();
for($i = 0; $i <= 255; $i++) {
$rndkey[$i] = ord($cryptkey[$i % $key_length]);
}
for($j = $i = 0; $i < 256; $i++) {
$j = ($j + $box[$i] + $rndkey[$i]) % 256;
$tmp = $box[$i];
$box[$i] = $box[$j];
$box[$j] = $tmp;
}
for($a = $j = $i = 0; $i < $string_length; $i++) {
$a = ($a + 1) % 256;
$j = ($j + $box[$a]) % 256;
$tmp = $box[$a];
$box[$a] = $box[$j];
$box[$j] = $tmp;
$result .= chr(ord($string[$i]) ^ ($box[($box[$a] + $box[$j]) % 256]));
}
if($operation == 'DECODE') {
if((substr($result, 0, 10) == 0 || substr($result, 0, 10) - time() > 0) && substr($result, 10, 16) == substr(md5(substr($result, 26).$keyb), 0, 16)) {
return substr($result, 26);
} else {
return '';
}
} else {
return $keyc.rtrim(strtr(base64_encode($result), '+/', '-_'), '=');
}
}2、简单对称加密算法
$content = "12312312";
$key = "key";
/**
* 简单对称加密算法之加密
* @param String $string 需要加密的字串
* @param String $skey 加密EKY
* @return String
*/
function encode($string = '', $skey) {
$strArr = str_split(base64_encode($string));
$strCount = count($strArr);
foreach (str_split($skey) as $key => $value)
$key < $strCount && $strArr[$key].=$value;
return str_replace(array('=', '+', '/'), array('huihui', 'HUIHUI', 'HuiHii'), join('', $strArr));
}
/**
* 简单对称加密算法之解密
* @param String $string 需要解密的字串
* @param String $skey 解密KEY
* @return String
*/
function decode($string = '', $skey ) {
$strArr = str_split(str_replace(array('huihui', 'HUIHUI', 'HuiHii'), array('=', '+', '/'), $string), 2);
$strCount = count($strArr);
foreach (str_split($skey) as $key => $value)
$key <= $strCount && $strArr[$key][1] === $value && $strArr[$key] = $strArr[$key][0];
return base64_decode(join('', $strArr));
}
echo "string : " . $content . " <br />";
echo "encode : " . ($enstring = encode($content,$key)) . '<br />';
echo "decode : " . decode($enstring,$key);
exit();3、常用对称加密算法（DES/AES）类
<?php
/**
* 常用对称加密算法类
* 支持密钥：64/128/256 bit（字节长度8/16/32）
* 支持算法：DES/AES（根据密钥长度自动匹配使用：DES:64bit AES:128/256bit）
* 支持模式：CBC/ECB/OFB/CFB
* 密文编码：base64字符串/十六进制字符串/二进制字符串流
* 填充方式: PKCS5Padding（DES）
*/
class Xcrypt{
private $mcrypt;
private $key;
private $mode;
private $iv;
private $blocksize;
/**
* 构造函数
*
* @param string 密钥
* @param string 模式
* @param string 向量（"off":不使用 / "auto":自动 / 其他:指定值，长度同密钥）
*/
public function __construct($key, $mode = 'cbc', $iv = "off"){
switch (strlen($key)){
case 8:
$this->mcrypt = MCRYPT_DES;
break;
case 16:
$this->mcrypt = MCRYPT_RIJNDAEL_128;
break;
case 32:
$this->mcrypt = MCRYPT_RIJNDAEL_256;
break;
default:
die("Key size must be 8/16/32");
}
$this->key = $key;
switch (strtolower($mode)){
case 'ofb':
$this->mode = MCRYPT_MODE_OFB;
if ($iv == 'off') die('OFB must give a IV'); //OFB必须有向量
break;
case 'cfb':
$this->mode = MCRYPT_MODE_CFB;
if ($iv == 'off') die('CFB must give a IV'); //CFB必须有向量
break;
case 'ecb':
$this->mode = MCRYPT_MODE_ECB;
$iv = 'off'; //ECB不需要向量
break;
case 'cbc':
default:
$this->mode = MCRYPT_MODE_CBC;
}
switch (strtolower($iv)){
case "off":
$this->iv = null;
break;
case "auto":
$source = PHP_OS=='WINNT' ? MCRYPT_RAND : MCRYPT_DEV_RANDOM;
$this->iv = mcrypt_create_iv(mcrypt_get_block_size($this->mcrypt, $this->mode), $source);
break;
default:
$this->iv = $iv;
}
}
/**
* 获取向量值
* @param string 向量值编码（base64/hex/bin）
* @return string 向量值
*/
public function getIV($code = 'base64'){
switch ($code){
case 'base64':
$ret = base64_encode($this->iv);
break;
case 'hex':
$ret = bin2hex($this->iv);
break;
case 'bin':
default:
$ret = $this->iv;
}
return $ret;
}
/**
* 加密
* @param string 明文
* @param string 密文编码（base64/hex/bin）
* @return string 密文
*/
public function encrypt($str, $code = 'base64'){
if ($this->mcrypt == MCRYPT_DES) $str = $this->_pkcs5Pad($str);
if (isset($this->iv)) {
$result = mcrypt_encrypt($this->mcrypt, $this->key, $str, $this->mode, $this->iv);
} else {
@$result = mcrypt_encrypt($this->mcrypt, $this->key, $str, $this->mode);
}
switch ($code){
case 'base64':
$ret = base64_encode($result);
break;
case 'hex':
$ret = bin2hex($result);
break;
case 'bin':
default:
$ret = $result;
}
return $ret;
}
/**
* 解密
* @param string 密文
* @param string 密文编码（base64/hex/bin）
* @return string 明文
*/
public function decrypt($str, $code = "base64"){
$ret = false;
switch ($code){
case 'base64':
$str = base64_decode($str);
break;
case 'hex':
$str = $this->_hex2bin($str);
break;
case 'bin':
default:
}
if ($str !== false){
if (isset($this->iv)) {
$ret = mcrypt_decrypt($this->mcrypt, $this->key, $str, $this->mode, $this->iv);
} else {
@$ret = mcrypt_decrypt($this->mcrypt, $this->key, $str, $this->mode);
}
if ($this->mcrypt == MCRYPT_DES) $ret = $this->_pkcs5Unpad($ret);
}
return $ret;
}
private function _pkcs5Pad($text){
$this->blocksize = mcrypt_get_block_size($this->mcrypt, $this->mode);
$pad = $this->blocksize - (strlen($text) % $this->blocksize);
return $text . str_repeat(chr($pad), $pad);
}
private function _pkcs5Unpad($text){
$pad = ord($text{strlen($text) - 1});
if ($pad > strlen($text)) return false;
if (strspn($text, chr($pad), strlen($text) - $pad) != $pad) return false;
$ret = substr($text, 0, -1 * $pad);
return $ret;
}
private function _hex2bin($hex = false){
$ret = $hex !== false && preg_match('/^[0-9a-fA-F]+$/i', $hex) ? pack("H*", $hex) : false;
return $ret;
}
}<?php
header('Content-Type:text/html;Charset=utf-8;');
include "Xcrypt.class.php";
$a = isset($_GET['a']) ? $_GET['a'] : '测试123';
//密钥
$key1 = '12345678123456781234567812345678'; //256 bit
$key = '1234567812345678'; //128 bit
$key = '12345678'; //64 bit
//设置模式和IV
$m = new Xcrypt($key, 'cbc', 'auto');
//获取向量值
echo '向量：';
var_dump($m->getIV('base64'));
//加密
$b = $m->encrypt($a, 'base64');
var_dump($b);
//解密
$c = $m->decrypt($b, 'base64');
var_dump($c);4、PHP7.* DES的加密解密
//des加密（cbc模式）
public function encrypt($str,$key)
{
$str = $this->pkcsPadding($str, 8);
$v = pack('H*', "1234567890abcdef");
$key = str_pad($key, 8, '0'); //3DES加密将8改为24
$sign = openssl_encrypt($str, 'DES-CBC', $key,OPENSSL_RAW_DATA | OPENSSL_NO_PADDING,$v);
$sign = base64_encode($sign);
return $sign;
}
//des解密（cbc模式）
public function decrypt($encrypted,$key)
{
$encrypted = base64_decode($encrypted);
$v = pack('H*', "1234567890abcdef");
$key = str_pad($key, 8, '0'); //3DES加密将8改为24
$sign = @openssl_decrypt($encrypted, 'DES-CBC', $key,OPENSSL_RAW_DATA | OPENSSL_NO_PADDING,$v);
$sign = $this->unPkcsPadding($sign);
$sign = rtrim($sign);
return $sign;
}
/**
* 填充
*
* @param $str
* @param $blocksize
* @return string
*/
private function pkcsPadding($str, $blocksize)
{
$pad = $blocksize - (strlen($str) % $blocksize);
return $str . str_repeat(chr($pad), $pad);
}
/**
* 去填充
*
* @param $str
* @return string
*/
private function unPkcsPadding($str)
{
$pad = ord($str{strlen($str) - 1});
if ($pad > strlen($str)) {
return false;
}
return substr($str, 0, -1 * $pad);
}5、加密解密函数
© 版权声明
文章未经允许请勿转载。
THE END
![[PHP类]使用PHP将JPEG和PNG转换为WebP-小七笔记](https://www.snswm.com/wp-content/uploads/2024/07/d2b5ca33bd20240701222148-800x444.png)
![[PHP库]在图像上添加文字或图像水印-小七笔记](https://www.snswm.com/wp-content/uploads/2024/07/d2b5ca33bd20240701221537-800x457.png)
暂无评论内容