Re: PHP to decode AES

On Thu, Oct 18, 2012 at 12:06 PM, Rick Dwyer <rpdwyer@earthlink.net> wrote: > Hello all. > > Has anyone ever tried to decode a JAVA AES/CBC encrypted string with PHP before? > > I found a tutorial online with the following code to use as starting point, but it fails to > return anything readable: > > $code ='Hello World'; > $key = 'my key'; > > function decrypt($code, $key) { > $key = hex2bin($key); > $code = hex2bin($code); > $td = mcrypt_module_open("rijndael-128", "", "cbc", > ""); > mcrypt_generic_init($td, $key, "fedcba9876543210"); > $decrypted = mdecrypt_generic($td, $code); > mcrypt_generic_deinit($td); > mcrypt_module_close($td); > return utf8_encode(trim($decrypted)); > } > > > function hex2bin($hexdata) { > $bindata = ""; > for ($i = 0; $i < strlen($hexdata); $i += 2) { > $bindata .= chr(hexdec(substr($hexdata, $i, 2))); > } > return $bindata; > } > echo decrypt($code, $key); > > The above returns output containing a series of unprintable characters. > > I thought maybe it was due to $code not being in a hex format, but after converting to hex and > resubmitting, I still unprintable characters. > > Any info is appreciated. Can you post the Java code you're using? There are things such as the padding specification that could cause some issues. Adam -- Nephtali: A simple, flexible, fast, and security-focused PHP framework http://nephtaliproject.com