Encrypt dan Decrypt

<li>bin2hex
<br/>
<?php
$str = bin2hex('Ini siapa?');
echo $str;
echo '<br/>';
echo hex2bin('496e692073696170613f');
?>
</li>
<br/>

<li>based64
<br/>
<?php
$data = "Tutorial base64 di php www.malasngoding.com";
echo base64_encode($data);
echo '<br/>';
$data2 = "VHV0b3JpYWwgYmFzZTY0IGRpIHBocCB3d3cubWFsYXNuZ29kaW5nLmNvbQ==";
echo base64_decode($data2);
?>
</li>
<br/>

<li>sha1
<br/>
<?php
$str3 = "Hello";
echo sha1($str3);

if (sha1($str3) == "f7ff9e8b7bb2e09b70935a5d785e0cc5d9d0abf0")
    {
    echo "<br>Hello";
    }
?>
</li>
<br/>

<li>md5
<br/>
<?php
$str4 = "Hello";
echo md5($str4);

if (md5($str4) == "8b1a9953c4611296a827abf8c47804d7")
    {
    echo "<br>Hello";
    }
?>
</li>
<br/>

<li>Dibutuhkan
<br/>
sudo apt install php-dev libmcrypt-dev gcc make autoconf libc-dev pkg-config
<br/>
sudo pecl install mcrypt-1.0.1
<br/>
echo 'extension=mcrypt.so' | sudo tee -a /etc/php/7.3/apache2/conf.d/mcrypt.ini
</li>

<li>mcrypt_encrypt

<?php
$key = 'aNdRgUkXp2s5v8y/B?E(H+MbQeShVmYq';
$kunci = 'Ini siapa?';
$encrypted = mcrypt_encrypt(MCRYPT_RIJNDAEL_256, $key, $kunci, MCRYPT_MODE_ECB);
echo '<br/>';
echo $encrypted;
?>
</li>

<li>mcrypt_decrypt
<?php
echo '<br/>';
$decrypted = mcrypt_decrypt(MCRYPT_RIJNDAEL_256, $key, $encrypted, MCRYPT_MODE_ECB);
echo $decrypted;
?>
</li>
<li>mcrypt_encrypt dan mcrypt_decrypt
<br/>
<?php
$Pass = "aNdRgUkXp2s5v8y/B?E(H+MbQeShVmYq";
$Clear = "Klartext";

$crypted = fnEncrypt($Clear, $Pass);
echo "Encrypted: ".$crypted."</br>";

$newClear = fnDecrypt($crypted, $Pass);
echo "Decrypted: ".$newClear."</br>";

function fnEncrypt($sValue, $sSecretKey)
{
    return rtrim(
        base64_encode(
            mcrypt_encrypt(
                MCRYPT_RIJNDAEL_256,
                $sSecretKey, $sValue,
                MCRYPT_MODE_ECB,
                mcrypt_create_iv(
                    mcrypt_get_iv_size(
                        MCRYPT_RIJNDAEL_256,
                        MCRYPT_MODE_ECB
                    ),
                    MCRYPT_RAND)
                )
            ), "\0"
        );
}

function fnDecrypt($sValue, $sSecretKey)
{
    return rtrim(
        mcrypt_decrypt(
            MCRYPT_RIJNDAEL_256,
            $sSecretKey,
            base64_decode($sValue),
            MCRYPT_MODE_ECB,
            mcrypt_create_iv(
                mcrypt_get_iv_size(
                    MCRYPT_RIJNDAEL_256,
                    MCRYPT_MODE_ECB
                ),
                MCRYPT_RAND
            )
        ), "\0"
    );
}
?>
</li>
<li>mcrypt_encrypt dan mcrypt_decrypt
<br/>
<?php
define("ENCRYPTION_KEY", "!@#$%^&*");
$string = "Ini siapa?";

echo $encrypted = encrypt($string, ENCRYPTION_KEY);
echo "<br />";
echo $decrypted = decrypt($encrypted, ENCRYPTION_KEY);

/**
 * Returns an encrypted & utf8-encoded
 */
function encrypt($pure_string, $encryption_key) {
    $iv_size = mcrypt_get_iv_size(MCRYPT_BLOWFISH, MCRYPT_MODE_ECB);
    $iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);
    $encrypted_string = mcrypt_encrypt(MCRYPT_BLOWFISH, $encryption_key, utf8_encode($pure_string), MCRYPT_MODE_ECB, $iv);
    return $encrypted_string;
}

/**
 * Returns decrypted original string
 */
function decrypt($encrypted_string, $encryption_key) {
    $iv_size = mcrypt_get_iv_size(MCRYPT_BLOWFISH, MCRYPT_MODE_ECB);
    $iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);
    $decrypted_string = mcrypt_decrypt(MCRYPT_BLOWFISH, $encryption_key, $encrypted_string, MCRYPT_MODE_ECB, $iv);
    return $decrypted_string;
}
?>
</li>
<br/>

<li> openssl encrypt
<br/>
<?php
class Openssl_EncryptDecrypt {
    function encrypt ($pure_string, $encryption_key) {
        $cipher     = 'AES-256-CBC';
        $options    = OPENSSL_RAW_DATA;
        $hash_algo  = 'sha256';
        $sha2len    = 32;
        $ivlen = openssl_cipher_iv_length($cipher);
        $iv = openssl_random_pseudo_bytes($ivlen);
        $ciphertext_raw = openssl_encrypt($pure_string, $cipher, $encryption_key, $options, $iv);
        $hmac = hash_hmac($hash_algo, $ciphertext_raw, $encryption_key, true);
        return $iv.$hmac.$ciphertext_raw;
    }
    function decrypt ($encrypted_string, $encryption_key) {
        $cipher     = 'AES-256-CBC';
        $options    = OPENSSL_RAW_DATA;
        $hash_algo  = 'sha256';
        $sha2len    = 32;
        $ivlen = openssl_cipher_iv_length($cipher);
        $iv = substr($encrypted_string, 0, $ivlen);
        $hmac = substr($encrypted_string, $ivlen, $sha2len);
        $ciphertext_raw = substr($encrypted_string, $ivlen+$sha2len);
        $original_plaintext = openssl_decrypt($ciphertext_raw, $cipher, $encryption_key, $options, $iv);
        $calcmac = hash_hmac($hash_algo, $ciphertext_raw, $encryption_key, true);
        if(function_exists('hash_equals')) {
            if (hash_equals($hmac, $calcmac)) return $original_plaintext;
        } else {
            if ($this->hash_equals_custom($hmac, $calcmac)) return $original_plaintext;
        }
    }
    /**
     * (Optional)
     * hash_equals() function polyfilling.
     * PHP 5.6+ timing attack safe comparison
     */
    function hash_equals_custom($knownString, $userString) {
        if (function_exists('mb_strlen')) {
            $kLen = mb_strlen($knownString, '8bit');
            $uLen = mb_strlen($userString, '8bit');
        } else {
            $kLen = strlen($knownString);
            $uLen = strlen($userString);
        }
        if ($kLen !== $uLen) {
            return false;
        }
        $result = 0;
        for ($i = 0; $i < $kLen; $i++) {
            $result |= (ord($knownString[$i]) ^ ord($userString[$i]));
        }
        return 0 === $result;
    }
}

define('ENCRYPTION_KEY', '__^%&Q@$&*!@#$%^&*^__');
$string = "Ini siapa?";

$OpensslEncryption = new Openssl_EncryptDecrypt;
$encrypted = $OpensslEncryption->encrypt($string, ENCRYPTION_KEY);
$decrypted = $OpensslEncryption->decrypt($encrypted, ENCRYPTION_KEY);
echo $encrypted;
echo '<br/>';
echo $decrypted;
?>
</li>
<br/>

<li> aes-128, sha256, openssl
<br/>
<?php
$token = "Ini siapa?";

$cipher_method = 'aes-128-ctr';
$enc_key = openssl_digest(php_uname(), 'SHA256', TRUE);
$enc_iv = openssl_random_pseudo_bytes(openssl_cipher_iv_length($cipher_method));
$crypted_token = openssl_encrypt($token, $cipher_method, $enc_key, 0, $enc_iv) . "::" . bin2hex($enc_iv);
echo $crypted_token;
//unset($token, $cipher_method, $enc_key, $enc_iv);
echo '<br/>';
// Decrypt text  --

list($crypted_token, $enc_iv) = explode("::", $crypted_token);
$cipher_method = 'aes-128-ctr';
$enc_key = openssl_digest(php_uname(), 'SHA256', TRUE);
$token = openssl_decrypt($crypted_token, $cipher_method, $enc_key, 0, hex2bin($enc_iv));
echo $token;
?>
</li>