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AES encryption/decryption in PHP
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<?php | |
// DEFINE our cipher | |
define('AES_256_CBC', 'aes-256-cbc'); | |
// Generate a 256-bit encryption key | |
// This should be stored somewhere instead of recreating it each time | |
$encryption_key = openssl_random_pseudo_bytes(32); | |
// Generate an initialization vector | |
// This *MUST* be available for decryption as well | |
$iv = openssl_random_pseudo_bytes(openssl_cipher_iv_length(AES_256_CBC)); | |
// Create some data to encrypt | |
$data = "Encrypt me, please!"; | |
echo "Before encryption: $data\n"; | |
// Encrypt $data using aes-256-cbc cipher with the given encryption key and | |
// our initialization vector. The 0 gives us the default options, but can | |
// be changed to OPENSSL_RAW_DATA or OPENSSL_ZERO_PADDING | |
$encrypted = openssl_encrypt($data, AES_256_CBC, $encryption_key, 0, $iv); | |
echo "Encrypted: $encrypted\n"; | |
// If we lose the $iv variable, we can't decrypt this, so: | |
// - $encrypted is already base64-encoded from openssl_encrypt | |
// - Append a separator that we know won't exist in base64, ":" | |
// - And then append a base64-encoded $iv | |
$encrypted = $encrypted . ':' . base64_encode($iv); | |
// To decrypt, separate the encrypted data from the initialization vector ($iv). | |
$parts = explode(':', $encrypted); | |
// $parts[0] = encrypted data | |
// $parts[1] = base-64 encoded initialization vector | |
// Don't forget to base64-decode the $iv before feeding it back to | |
//openssl_decrypt | |
$decrypted = openssl_decrypt($parts[0], AES_256_CBC, $encryption_key, 0, base64_decode($parts[1])); | |
echo "Decrypted: $decrypted\n"; | |
?> |
How to make it into AES 128 ECB?
function decrypt($data, $key) {
return openssl_decrypt(base64_decode($data), 'aes-128-ecb', $key, OPENSSL_PKCS1_PADDING);
}
thanks a lot 👍
Hi! Please give advice on how to make it into AES 256 GCM?
thank you so much it working fine
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How to make it into AES 128 ECB?