> 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'


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.


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