- PHP code
<?php function encryptCookie($value){ if(!$value){return false;} $key = 'paxospass1234!'; $text = $value; $iv_size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_CBC); $iv = mcrypt_create_iv($iv_size, MCRYPT_RAND); $crypttext = mcrypt_encrypt(MCRYPT_RIJNDAEL_256, $key, $text, MCRYPT_MODE_CBC, $iv); return array(trim(base64_encode($crypttext)),$iv); //encode for cookie } function decryptCookie($value,$iv){ if(!$value){return false;} $value = base64_decode($value); $key = 'paxospass1234!'; $text = $value; // $iv_size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_CBC); // $iv = mcrypt_create_iv($iv_size, MCRYPT_RAND); $decrypttext = mcrypt_decrypt(MCRYPT_RIJNDAEL_256, $key, $text, MCRYPT_MODE_CBC, $iv); return $decrypttext; } $str="this is for encry"; $s=encryptCookie($str); echo decryptCookie($s[0],$s[1]); ?>
没错。这函数正确,但是问题是,我要发到邮件里的是加密的代码,但是解码要到另一个网页,
问题是这个iv 打印出来时很多的方框框乱码,,怎么处理,,或者怎么让iv固定,我直接写$iv='123' 还报警告
------解决方案--------------------
呵呵,你咋直接用了那个函数了,我只是提供下简单示例。
实际生产环境肯定是加密是一端,解密是另一端的。
所以你是问另一端怎么得到那个随机不定iv吧?
因为CBC的iv固定是32字节的,所以直接把它拼进加密串就行了
- PHP code
<?php function encryptCookie($value){ if(!$value){return false;} $key = 'paxospass1234!'; $text = $value; $iv_size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_CBC); $iv = mcrypt_create_iv($iv_size, MCRYPT_RAND); $crypttext = mcrypt_encrypt(MCRYPT_RIJNDAEL_256,$key,$text, MCRYPT_MODE_CBC, $iv); $ivencode = mcrypt_encrypt(MCRYPT_RIJNDAEL_256,$crypttext,$iv,MCRYPT_MODE_ECB);//其实直接拼接就可以,这里再做一次加密 return base64_encode($crypttext.$ivencode); //encode for cookie,iv拼接到串尾 } function decryptCookie($value){ if(!$value){return false;} $value = base64_decode($value); $rvalue = substr($value,0,-32);//原加密串 $iv = substr($value,-32);//iv $iv = mcrypt_decrypt(MCRYPT_RIJNDAEL_256,$rvalue,$iv,MCRYPT_MODE_ECB);//解密iv $key = 'paxospass1234!'; $text = $rvalue; // $iv_size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_CBC); // $iv = mcrypt_create_iv($iv_size, MCRYPT_RAND); $decrypttext = mcrypt_decrypt(MCRYPT_RIJNDAEL_256, $key, $text, MCRYPT_MODE_CBC, $iv); return $decrypttext; } $str="this is for encry"; $s=encryptCookie($str); echo "encrypt:".$s."<br/>"; echo "decrypt:".decryptCookie($s); ?>