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<?php
$lastivmd5 = "";
function test_mcrypt($func, $cipher, $needsiv = true) {
global $key, $data, $lastivmd5;
echo "testing cipher $cipher: ".mcrypt_get_cipher_name($cipher)." + $func\n";
$size = mcrypt_get_block_size($cipher);
echo " | blocksize is $size\n";
if($needsiv) {
$iv = mcrypt_create_iv($size, MCRYPT_DEV_URANDOM);
$ivmd5 = md5($iv);
if($lastivmd5 == $ivmd5) {
echo "VERY INSECURE initial vector!\n";
}
$lastivmd5 = $ivmd5;
$res = $func($cipher, $key, $data, MCRYPT_ENCRYPT, $iv);
} else {
$res = $func($cipher, $key, $data, MCRYPT_ENCRYPT);
}
if($needsiv) {
$back = $func($cipher, $key, $res, MCRYPT_DECRYPT, $iv);
} else {
$back = $func($cipher, $key, $res, MCRYPT_DECRYPT);
}
echo sprintf(" | key is %d bytes long, data %d, res %d, back %d\n",
strlen($key), strlen($data), strlen($res), strlen($back));
if($back != $data) {
echo "FAILED. data ain't back\n";
} else echo " | passed\n";
}
error_reporting(15);
$key = "this is a top secret key";
$datax = "1234567890abcdef";
$data = "";
for($i = 0; $i < 12; $i++) $data .= $datax;
for($i = 0; $i < 60; $i++) {
if(mcrypt_get_cipher_name($i) != false) {
test_mcrypt("mcrypt_ofb", $i);
test_mcrypt("mcrypt_cfb", $i);
test_mcrypt("mcrypt_cbc", $i);
test_mcrypt("mcrypt_cbc", $i, false);
test_mcrypt("mcrypt_ecb", $i, false);
}
}
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