An example to how encrypt or decrypt using sodium:
<?php
$key = random_bytes(SODIUM_CRYPTO_SECRETBOX_KEYBYTES);
$nonce = random_bytes(SODIUM_CRYPTO_SECRETBOX_NONCEBYTES);
$ciphertext = sodium_crypto_secretbox("Hello World !", $nonce, $key);
$plaintext = sodium_crypto_secretbox_open($ciphertext, $nonce, $key);
if ($plaintext === false) {
throw new Exception("Bad ciphertext");
}
echo $plaintext;
sodium_crypto_secretbox
(PHP 7 >= 7.2.0, PHP 8)
sodium_crypto_secretbox — Authenticated shared-key encryption
Description
sodium_crypto_secretbox(string
$message, string $nonce, string $key): stringEncrypt a message with a symmetric (shared) key.
Parameters
-
message -
The plaintext message to encrypt.
-
nonce -
A number that must be only used once, per message. 24 bytes long. This is a large enough bound to generate randomly (i.e. random_bytes()).
-
key -
Encryption key (256-bit).
Return Values
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celso fontes ¶
3 years ago
