Exemple #1
0
 public function decrypt()
 {
     $des = new \phpseclib\Crypt\DES();
     $des->setKey($this->key);
     $ciphertext = file_get_contents($this->getFileUploadDir() . '/' . $this->file_name);
     $plaintext = $des->decrypt($ciphertext);
     $hash = md5($plaintext);
     $this->save_name = "DecryptedFile_" . $hash;
     file_put_contents($this->getFileRootDir() . '/' . $this->save_name, $plaintext);
     unlink($this->file->getPathname());
     return new CryptoFile($hash, $this->getWebPath() . '/' . $this->save_name);
 }
Exemple #2
0
$ivSize = 8;
$randomIV = phpseclib\Crypt\Random::string($ivSize);
echo 'Plaintext: ' . $plaintext . "\r\n";
//Create new DES object for encryption
$des_encrypt = new \phpseclib\Crypt\DES(\phpseclib\Crypt\DES::MODE_CBC);
//Set preferred engine to OPENSSL
$des_encrypt->setPreferredEngine(phpseclib\Crypt\DES::ENGINE_OPENSSL);
//set key length to 256
$des_encrypt->setKeyLength(64);
//set pbkdf2 with sha512 and 4096 iterations as default password hashing method
$des_encrypt->setPassword($password, 'pbkdf2', 'sha512', NULL, 4096);
$des_encrypt->setIV($randomIV);
$ciphertext_raw = $des_encrypt->encrypt($plaintext);
echo 'Ciphertext(RAW): ' . $ciphertext_raw . "\r\n";
$ciphertext = base64_encode($randomIV . $ciphertext_raw);
echo 'Ciphertext(base64): ' . $ciphertext . "\r\n";
//Create new DES object for decryption
$des_decrypt = new phpseclib\Crypt\DES(phpseclib\Crypt\DES::MODE_CBC);
//set OPENSSL as preferred engine
$des_decrypt->setPreferredEngine(phpseclib\Crypt\DES::ENGINE_OPENSSL);
//set key length to 256
$des_decrypt->setKeyLength(64);
//set pbkdf2 with sha512 and 4096 iterations as default password hashing method
$des_decrypt->setPassword($password, 'pbkdf2', 'sha512', NULL, 4096);
$ciphertext_decoded = base64_decode($ciphertext);
$des_decrypt->setIV(substr($ciphertext_decoded, 0, $ivSize));
//decode from base64 and decrypt
$decrypted = $des_decrypt->decrypt(substr($ciphertext_decoded, $ivSize));
echo 'Decrypted: ' . $decrypted . "\r\n";
//is everything ok?
var_dump($plaintext == $decrypted);