原文:php中des加密解密 匹配C#des加密解密 对称加密
网上找来的 php des加密解密 完全匹配上一篇C# 字符串加密解密函数 可以用于C#和php通信 对数据进行加密，其中$key 是加密密钥，$iv 是偏移量，默认偏移量和加密密匙是一样的，
<?php
class DES
{
var $key;
var $iv; //偏移量
function DES( $key, $iv=0) {
//key长度8例如:1234abcd
$this->key = $key;
if( $iv == 0 ) {
$this->iv = $key; //默认以$key 作为 iv
} else {
$this->iv = $iv; //mcrypt_create_iv ( mcrypt_get_block_size (MCRYPT_DES, MCRYPT_MODE_CBC), MCRYPT_DEV_RANDOM );
}
}
function encrypt($str) {
//加密，返回大写十六进制字符串
$size = mcrypt_get_block_size(MCRYPT_DES,MCRYPT_MODE_CBC);
$str = $this->pkcs5Pad ( $str, $size );
return strtoupper( bin2hex( mcrypt_cbc(MCRYPT_DES, $this->key, $str, MCRYPT_ENCRYPT, $this->iv ) ) );
}
function decrypt($str) {
//解密
$strBin = $this->hex2bin( strtolower( $str ) );
$str = mcrypt_cbc( MCRYPT_DES, $this->key, $strBin, 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, 0, - 1
* $pad );
}
}
?>
测试
$str = "xublog";
$key = '12345678';
$crypt = new DES($key);
$mstr = $crypt->encrypt($str);
echo "[ $str ]加密:[ $mstr
]<br>";
$str = $crypt->decrypt($mstr);
echo "[ $mstr ]解密:[ $str
]<br>";