求PHP的AES 解密函数

[ron_xin]

六．证件号加密解密算法
证件号为AES 加密方式并以BASE64 编码为密文。只需要使用对应的密钥用AES
解密即可，详情如下：
加密算法：AES/ECB/PKCS5Padding (AES 加密，ECB模式，PKCS5 填充算法)
编码：UTF-8/BASE64
解密密钥：v074KOx28G46b6gH
解密调用事例：
var data = Convert.FromBase64String("加密后的身份证密文"); //密文需要先用
BASE64 解码转换为字节数组
using (var aes = Aes.Create())
{
aes.Key = Encoding.UTF8.GetBytes("解密密钥"); //密钥
aes.Mode = CipherMode.ECB; //ECB模式
aes.Padding = PaddingMode.PKCS7; //PKCS7(兼容PKCS5)
var content = aes.CreateDecryptor().TransformFinalBlock(data, 0, data.Length);
//AES 解密
var result = Encoding.UTF8.GetString(content); //明文
}

[qq_34139573]

https://blog.shiniv.com/2013/11/use-aes-encryption-algorithm-to-encrypt-data-in-php/

[ron_xin]

<?php
class CryptAES
{
    protected $cipher = MCRYPT_RIJNDAEL_128;
    protected $mode = MCRYPT_MODE_ECB;
    protected $pad_method = NULL;
    protected $secret_key = '';
    protected $iv = '';

    public function set_cipher($cipher)
    {
        $this->cipher = $cipher;
    }

    public function set_mode($mode)
    {
        $this->mode = $mode;
    }

    public function set_iv($iv)
    {
        $this->iv = $iv;
    }

    public function set_key($key)
    {
        $this->secret_key = $key;
    }

    public function require_pkcs5()
    {
        $this->pad_method = 'pkcs5';
    }

    protected function pad_or_unpad($str, $ext)
    {
        if ( is_null($this->pad_method) )
        {
            return $str;
        }
        else
        {
            $func_name = __CLASS__ . '::' . $this->pad_method . '_' . $ext . 'pad';
            if ( is_callable($func_name) )
            {
                $size = mcrypt_get_block_size($this->cipher, $this->mode);
                return call_user_func($func_name, $str, $size);
            }
        }
        return $str;
    }

    protected function pad($str)
    {
        return $this->pad_or_unpad($str, '');
    }

    protected function unpad($str)
    {
        return $this->pad_or_unpad($str, 'un');
    }

    public function encrypt($str)
    {
        $str = $this->pad($str);
        $td = mcrypt_module_open($this->cipher, '', $this->mode, '');

        if ( empty($this->iv) )
        {
            $iv = @mcrypt_create_iv(mcrypt_enc_get_iv_size($td), MCRYPT_RAND);
        }
        else
        {
            $iv = $this->iv;
        }

        mcrypt_generic_init($td, $this->secret_key, $iv);
        $cyper_text = mcrypt_generic($td, $str);
        $rt=base64_encode($cyper_text);
        //$rt = bin2hex($cyper_text);
        mcrypt_generic_deinit($td);
        mcrypt_module_close($td);

        return $rt;
    }

    public function decrypt($str){
        $td = mcrypt_module_open($this->cipher, '', $this->mode, '');

        if ( empty($this->iv) )
        {
            $iv = @mcrypt_create_iv(mcrypt_enc_get_iv_size($td), MCRYPT_RAND);
        }
        else
        {
            $iv = $this->iv;
        }

        mcrypt_generic_init($td, $this->secret_key, $iv);
        //$decrypted_text = mdecrypt_generic($td, self::hex2bin($str));
        $decrypted_text = mdecrypt_generic($td, base64_decode($str));
        $rt = $decrypted_text;
        mcrypt_generic_deinit($td);
        mcrypt_module_close($td);

        return $this->unpad($rt);
    }

    public static function hex2bin($hexdata) {
        $bindata = '';
        $length = strlen($hexdata);
        for ($i=0; $i< $length; $i += 2)
        {
            $bindata .= chr(hexdec(substr($hexdata, $i, 2)));
        }
        return $bindata;
    }

    public static function pkcs5_pad($text, $blocksize)
    {
        $pad = $blocksize - (strlen($text) % $blocksize);
        return $text . str_repeat(chr($pad), $pad);
    }

    public static 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);
    }
}
?>

下面调用时，前面是对的，但是会多出很多口口口口口口口口口口口口口口口

function smz_decrypt($plainText)
{
$keyStr = 'v074KOx28G46b6gH';

$aes = new CryptAES();
$aes->set_key($keyStr);
$aes->require_pkcs5();
//$encText = $aes->encrypt($plainText);
$decString = trimEnd($aes->decrypt($plainText));

return $decString;
}

echo smz_decrypt('Y6vcb/ins3u9+g9Sp1Eu4Q==');

[ron_xin]

<?php  

include 'CryptAES.class.php'; 

//Y6vcb/ins3u9+g9Sp1Eu4Q==
//P0o4r2F8qYYAcebNfu/wfQ==
//WhxmNg7v1V7+utvOrvz92A==
//YcF+g1XKUT4C30OepZRgrQ==
//o1PKwe6rt1cf1H1j2SszNQ==
//qFE4etxU1hGk1ZrKrmVy3Q==
$plainText ='1234578';
$keyStr = 'v074KOx28G46b6gH';
 
$aes = new CryptAES();
$aes->set_key($keyStr);
$aes->require_pkcs5();
$encText = $aes->encrypt($plainText);
$decString = $aes->decrypt($encText);
 
echo $encText.'</br>';
echo $decString.'</br>';

?>

ZIRU5+rM55t+O0KPLyzD1Q== 1234578

[ron_xin]

1234578 怎么将 去掉？

[xuzuning]

哪里有空格？ 这个类对你是否有效，要看你获取的密文是否能正确解密