PHP中使用AES加密算法加密数据的例子

<?php
$privateKey = "1234567812345678";
$iv = "1234567812345678";
$data = "Test String";

//加密
$encrypted = mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $privateKey, $data, MCRYPT_MODE_CBC, $iv);
echo(base64_encode($encrypted));
echo '<br/>';

//解密
$encryptedData = base64_decode("2fbwW9+8vPId2/foafZq6Q==");
$decrypted = mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $privateKey, $encryptedData, MCRYPT_MODE_CBC, $iv);
echo($decrypted);
?>

<?php 
//加密   
$key = '1234567890123456';   
$content = 'hello';   
$padkey = pad2Length($key,16);   
$cipher = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_ECB, '');   
$iv_size = mcrypt_enc_get_iv_size($cipher);   
$iv = mcrypt_create_iv($iv_size, MCRYPT_RAND); #IV自动生成？   
echo '自动生成iv的长度:'.strlen($iv).'位:'.bin2hex($iv).'<br>';   
if (mcrypt_generic_init($cipher, pad2Length($key,16), $iv) != -1)   
{   
   // PHP pads with NULL bytes if $content is not a multiple of the block size..   
   $cipherText = mcrypt_generic($cipher,pad2Length($content,16) );   
   mcrypt_generic_deinit($cipher);   
   mcrypt_module_close($cipher);   
    
   // Display the result in hex.   
   printf("128-bit encrypted result:n%snn",bin2hex($cipherText));   
   print("<br />");   
    
}   
//解密   
$mw = bin2hex($cipherText);   
$td = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_ECB, '');   
if (mcrypt_generic_init($td, $padkey, $iv) != -1)   
{   
   $p_t = mdecrypt_generic($td, hexToStr($mw));   
   mcrypt_generic_deinit($td);   
   mcrypt_module_close($td);   
    
   $p_t = trimEnd($p_t);   
   echo '解密:';   
   print($p_t);   
   print("<br />");   
   print(bin2hex($p_t));   
   echo '<br><br>';   
}   
//将$text补足$padlen倍数的长度   
function pad2Length($text, $padlen){   
   $len = strlen($text)%$padlen;   
   $res = $text;   
   $span = $padlen-$len;   
   for($i=0; $i<$span; $i++){   
       $res .= chr($span);   
   }   
   return $res;   
}   
//将解密后多余的长度去掉(因为在加密的时候 补充长度满足block_size的长度)   
function trimEnd($text){   
   $len = strlen($text);   
   $c = $text[$len-1];   
   if(ord($c) <$len){   
       for($i=$len-ord($c); $i<$len; $i++){   
           if($text[$i] != $c){   
               return $text;   
           }   
       }   
       return substr($text, 0, $len-ord($c));   
   }   
   return $text;   
}   
//16进制的转为2进制字符串   
function hexToStr($hex)   
{   
   $bin="";   
   for($i=0; $i<strlen($hex)-1; $i+=2)   
   {   
       $bin.=chr(hexdec($hex[$i].$hex[$i+1]));   
   }   
   return $bin;   
}   

<?php       
$key = '1234567890123456';   
$key = pad2Length($key,16);   
$iv = 'asdff';   
$content = 'hello';   
$content = pad2Length($content,16);   
$AESed =  bin2hex( mcrypt_encrypt(MCRYPT_RIJNDAEL_128,$key,$content,MCRYPT_MODE_ECB,$iv) ); #加密   
echo "128-bit encrypted result:".$AESed.'<br>';   
$jiemi = mcrypt_decrypt(MCRYPT_RIJNDAEL_128,$key,hexToStr($AESed),MCRYPT_MODE_ECB,$iv); #解密   
echo '解密:';   
echo trimEnd($jiemi);     
?> 

# cd /usr/local/src
# wget http://cn.php.net/get/php-5.2.5.tar.gz/from/this/mirror
wget http://www.hardened-php.net/suhosin/_media/suhosin-patch-5.2.5-0.9.6.2.patch.gz //从官方下载补丁
# tar zxvf php-5.2.5.tar.gz
# gunzip suhosin-patch-5.2.5-0.9.6.2.patch.gz // 解压补丁
# cd php-5.2.5
# patch -p 1 -i ../suhosin-patch-5.2.5-0.9.6.2.patch // 给php打上补丁
# ./buildconf --force //一定要执行这一步。
# CHOST="i686-pc-linux-gnu" CFLAGS="-O3 -msse2 -mmmx -mfpmath=sse -mcpu=pentium4 -march=pentium4 -pipe -fomit-frame-pointer" CXXFLAGS="-O3 -msse2 -mmmx -mfpmath=sse -funroll-loops -mcpu=pentium4 -march=pentium4 -pipe -fomit-frame-pointer" ./configure --prefix=/usr/local/php --with-apxs2=/usr/local/apache2/bin/apxs --with-zlib-dir --with-bz2 --with-tiff-dir --with-libxml-dir=/usr/local/libxml2 --with-gd=/usr/local/gd2 --with-freetype-dir --with-jpeg-dir --with-png-dir --with-ttf --enable-mbstring --with-mysql=/usr/local/mysql --with-mysqli=/usr/local/mysql/bin/mysql_config --with-config-file-path=/etc --with-iconv --disable-ipv6 --enable-static --enable-maintainer-zts --enable-memory-limit --enable-zend-multibyte --enable-sockets --enable-soap --enable-suhosin // 配置选项
# make
# make install
重启apachectl,查看phpinfo信息，会出现
This server is protected with the Suhosin Patch 0.9.6.2
Copyright (c) 2006 Hardened-PHP Project
等许多Suhosin信息那么你就成功了。呵呵。
在这里也顺便说一下将suhosin安装成为php的动态扩展的方法。
wget http://download.suhosin.org/suhosin-0.9.23.tgz
tar zxvfsuhosin-0.9.23.tgz
cd suhosin-0.9.23
/usr/local/php/bin/phpize //这一步不能省
./configure --with-php-config=/usr/local/php/bin/php-config //必须在这儿注明php-config所在的绝对路径。
make
make install
会提示编译的模块存在的目录，记住它。
Installing shared extensions: /usr/local/php/lib/php/extensions/no-debug-non-zts-20060613/
然后在php.ini中增加一行下列语句。
extension=suhosin.so
suhosin.executor.disable_eval = on

suhosin.executor.disable_eval = on
[PATH=/htdocs/www/ex1/]
suhosin.executor.disable_eval = off

$stmt = $dbConnection->prepare('SELECT * FROM employees WHERE name = ?');
$stmt->bind_param('s', $name);
$stmt->execute();
$result = $stmt->get_result();
while ($row = $result->fetch_assoc()) {
    // do something with $row
}

function get_str($string)
{
    if (!get_magic_quotes_gpc())
    {
        return addslashes($string);
    }
    return $string;
}