Linux ip-172-26-7-228 5.4.0-1103-aws #111~18.04.1-Ubuntu SMP Tue May 23 20:04:10 UTC 2023 x86_64
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<?php
error_reporting(0);
function encrypt($plainText,$key)
{
$secretKey = hextobin(md5($key));
$initVector = pack("C*", 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f);
$openMode = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '','cbc', '');
$blockSize = mcrypt_get_block_size(MCRYPT_RIJNDAEL_128, 'cbc');
$plainPad = pkcs5_pad($plainText, $blockSize);
if (mcrypt_generic_init($openMode, $secretKey, $initVector) != -1)
{
$encryptedText = mcrypt_generic($openMode, $plainPad);
mcrypt_generic_deinit($openMode);
}
return bin2hex($encryptedText);
}
function decrypt($encryptedText,$key)
{
$secretKey = hextobin(md5($key));
$initVector = pack("C*", 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f);
$encryptedText=hextobin($encryptedText);
$openMode = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '','cbc', '');
mcrypt_generic_init($openMode, $secretKey, $initVector);
$decryptedText = mdecrypt_generic($openMode, $encryptedText);
$decryptedText = rtrim($decryptedText, "\0");
mcrypt_generic_deinit($openMode);
return $decryptedText;
}
//*********** Padding Function *********************
function pkcs5_pad ($plainText, $blockSize)
{
$pad = $blockSize - (strlen($plainText) % $blockSize);
return $plainText . str_repeat(chr($pad), $pad);
}
//********** Hexadecimal to Binary function for php 4.0 version ********
function hextobin($hexString)
{
$length = strlen($hexString);
$binString="";
$count=0;
while($count<$length)
{
$subString =substr($hexString,$count,2);
$packedString = pack("H*",$subString);
if ($count==0)
{
$binString=$packedString;
}
else
{
$binString.=$packedString;
}
$count+=2;
}
return $binString;
}
?>
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