Re: Encrypt then decrypt yields extra dots at end

> I thought this code: > > $enc=mcrypt_ecb(MCRYPT_RIJNDAEL_256,"salt123","encrypt_me",MCRYPT_ENCRYPT); > $dec=mcrypt_ecb(MCRYPT_RIJNDAEL_256,"salt123",$enc,MCRYPT_DECRYPT); > echo $dec; > > would yield "encrypt_me". The actual result is > "encrypt_me......................" (bunch of extra dots). > > Why, and how do I fix it? The manual says that mcrypt_ecb() is deprecated and recommends mcrypt_generic() instead. Its page mentions that the input string will be padded to the next-highest multiple of the current block size, and points out: 'Note the string returned by mdecrypt_generic() will be [padded] as well...use rtrim($str, "\0") to remove the padding' http://us3.php.net/manual/en/function.mcrypt-generic.php So I would guess that mcrypt_ecb() operates in a similar way, which can be solved with rtrim(). Does your script actually echo "." characters (ASCII 0x2E), or is that your terminal's way of representing some non-printable character? It would surprise me if mcrypt_ecb() used the "." character as its pad, but maybe it does. Ben