echo "<strong>Hashing</strong><br />";
$password = '******';
// user generated password
$salt = openssl_random_pseudo_bytes(24);
echo "Salt= {$salt}<br />";
$md5 = md5($password . $salt);
echo "MD5 = {$md5}<br />";
$sha1 = sha1($password . $salt);
echo "SHA1 = {$sha1}<br />";
$sha512 = hash('sha512', $password . $salt);
echo "SHA512 = {$sha512}<br />";
echo "<br />-----------------------------------------<br />";
echo "<strong>Encryption</strong><br />";
$secretstring = "This is the secret string I want encrypting";
echo "Secret String = {$secretstring} <br />";
$encrypted_txt = public_encrypt($secretstring);
echo "Encrypted Text = {$encrypted_txt} <br />";
$decrypted_txt = private_decrypt($encrypted_txt);
echo "Decrypted Text = {$decrypted_txt} <br />";
echo "DECRYPTION ";
if ($secretstring === $decrypted_txt) {
echo "WORKED";
} else {
echo "FAILED";
}
function public_encrypt($plaintext)
{
$fp = fopen("./mykey.pub", "r");
$pub_key = fread($fp, 8192);
fclose($fp);
openssl_get_publickey($pub_key);
';
//208 characters, which is the up range my key can work with. Beyond that, it doesnot work.
//I use 2048 bit key, so it can enctry no more than 2048/8=256 byte data.
/*
<education>
humber
</education>
</resume>
';
*/
$encrypted = public_encrypt($str);
echo $encrypted;
echo "<br>";
echo private_decrypt($encrypted);
function public_encrypt($plaintext)
{
$fp = fopen("publickey", "r");
$pub_key = fread($fp, 8192);
fclose($fp);
openssl_get_publickey($pub_key);
openssl_public_encrypt($plaintext, $crypttext, $pub_key);
return base64_encode($crypttext);
}
function private_decrypt($encryptedext)
{
$fp = fopen("privatekey", "r");
